CN112351267A - Video display method, display controller, display control card and display control system - Google Patents

Abstract

The embodiment of the invention discloses a video display method and a display controller. Display control card and display control system. The video display method comprises the following steps: acquiring video frame pictures of an input source, wherein the video frame pictures comprise a left-eye video picture and a right-eye video picture; acquiring the input source frame frequency and the video format of the input source; respectively reading left eye image data and right eye image data from the left eye video image and the right eye video image of the video frame image; obtaining the output frequency of the left eye image data and the right eye image data according to a frame frequency threshold, an input source frame frequency and the video format so that the output frame frequency is not less than the frame frequency threshold; and outputting and displaying the left eye image data and the right eye image data according to the output frequency. The embodiment of the invention can improve the video display effect and the user experience.

Description

Video display method, display controller, display control card and display control system

Technical Field

The invention relates to the technical field of video processing and display, in particular to a video display method, a display controller, a display control card and a display control system.

Background

With the rapid development of display technology, the application fields of display systems are becoming wider and wider, such as cinemas, LED advertisement screens, and the like. And 3D (3 dimensional) display is a popular viewing mode at present. The existing 3D solution includes an input source, a display control system, and a display screen. The display control system comprises a display controller and a display control card connected with the display controller. To realize the 3D effect, the display controller needs to process the frame image of the input source to obtain a left-eye image and a right-eye image, and perform frequency doubling on the frame frequency of the input source to obtain the output frequencies of the left-eye image and the right-eye image, specifically, the display controller determines whether the frequency doubling on the frame frequency of the input source is needed to obtain the frame frequency of image output and display according to the video format of the input source, performs twice frequency doubling on the frame frequency of the input source if the frequency doubling is needed, and uses the frequency doubled frame frequency as the output frequency of image output and display, and uses the frame frequency of the input source as the output frequency of image output and display if the frequency doubling is not needed. The frame frequency of a cinema video source is generally lower, generally is 24-30 Hz, the frame frequency after frequency doubling processing is performed on an input source is 48-60 Hz, the display effect of a low-gray-scale image is not ideal when a display panel driving chip of a display screen such as an LED display screen is at a low frequency such as below 60Hz, and the flicker is serious when a user watches the low-gray-scale image.

Disclosure of Invention

In view of the above problems, embodiments of the present invention provide a video display method, a display controller, a display control card, and a display control system, so as to improve a video display effect and user experience.

In one aspect, a video display method provided in an embodiment of the present invention includes: acquiring video frame pictures of an input source, wherein the video frame pictures comprise a left-eye video picture and a right-eye video picture; acquiring the input source frame frequency and the video format of the input source; respectively reading left eye image data and right eye image data from the left eye video image and the right eye video image of the video frame image; obtaining the output frequency of the left eye image data and the right eye image data according to a frame frequency threshold, the input source frame frequency and the video format so that the output frame frequency is not less than the frame frequency threshold; and outputting and displaying the left eye image data and the right eye image data according to the output frequency.

According to the technical scheme, the output frequency of the left eye image data and the right eye image data is obtained according to the frame frequency threshold and the video format, the output frame frequency is not smaller than the frame frequency threshold, the left eye image and the right eye image in the video frame picture of the input source video are displayed at the output frequency not smaller than the frame frequency threshold, namely, the 3D display of the video can be controlled through the frame frequency threshold, the problem of low-gray flicker in 3D display of a cinema in the prior art is solved, and the 3D display effect is improved.

In one embodiment of the invention, the video display method is applied to a display control system, which comprises a display controller; wherein the obtaining the output frequencies of the left-eye image data and the right-eye image data according to the frame frequency threshold, the input source frame frequency, and the video format so that the output frame frequency is not less than the frame frequency threshold includes: the display controller compares the frame rate threshold to the input source frame rate based on the video format of the input source; when the input source frame frequency is smaller than the frame frequency threshold, the display controller obtains a first frequency difference value according to the input source frame frequency and the frame frequency threshold, determines a frequency multiplication factor according to the first frequency difference value, and obtains the output frequency according to the frequency multiplication factor; when the input source frame frequency is not less than the frame frequency threshold, the display controller takes the input source frame frequency as the output frequency.

In one embodiment of the invention, the video display method is applied to a display control system, and the display control system comprises a display control card; wherein the obtaining the output frequencies of the left-eye image data and the right-eye image data according to the frame frequency threshold, the input source frame frequency, and the video format so that the output frame frequency is not less than the frame frequency threshold includes: the display control card compares the frame frequency threshold value with the frame frequency of the input source based on the video format of the input source; when the input source frame frequency is smaller than the frame frequency threshold, the display control card determines a second frequency difference value according to the fact that the input source frame frequency is smaller than the frame frequency threshold, determines a frequency multiplication factor according to the second frequency difference value, and obtains the output frequency according to the frequency multiplication factor and the input source frame frequency; and when the input source frame frequency is not less than the frame frequency threshold, the display control card takes the input source frame frequency as the output frequency.

In one embodiment of the invention, the video display method is applied to a display control system, and the display control system comprises a display controller and a display control card connected with the display controller; wherein the obtaining the output frequencies of the left-eye image data and the right-eye image data according to the frame frequency threshold, the input source frame frequency, and the video format so that the output frame frequency is not less than the frame frequency threshold includes: the display controller performs first frequency doubling processing on the input source frame frequency based on the video format and a preset first frequency doubling factor to obtain a first frequency-doubled frame frequency, and sends the first frequency-doubled frame frequency to the display control card; the display control card compares the first frequency-doubled frame frequency with the frame frequency threshold; when the first frequency-doubled frame frequency is smaller than the frame frequency threshold, the display control card obtains a third frequency difference value according to the first frequency-doubled frame frequency and the frame frequency threshold, determines a second frequency multiplication factor according to the third frequency difference value, and obtains the output frequency according to the second frequency multiplication factor and the first frequency-doubled frame frequency; and when the first frequency-doubled frame frequency is not less than the frame frequency threshold, the display control card takes the first frequency-doubled frame frequency as the output frequency.

In one embodiment of the present invention, the deriving the output frequencies of the left eye image data and the right eye image data so that the output frame rate is not less than the frame rate threshold according to a frame rate threshold, the input source frame rate, and the video format includes: comparing the input source frame frequency with the frame frequency threshold value based on the video format to obtain a frequency multiplication factor; and obtaining the output frequency according to the frequency multiplication factor and the input source frame frequency.

In one embodiment of the invention, the video format includes the number of the input sources and the form of the video frame picture; the comparing the input source frame frequency and the frame frequency threshold value based on the video format to obtain a frequency multiplication factor comprises: when the number of the input sources is one, the left-eye video picture and the right-eye video picture are distributed in the video frame picture in a left-right or up-down mode, the frame frequency range of the input sources is 24-75Hz, and the frame frequency threshold is 100Hz, the range of the frequency multiplication factor is 2-6; when the number of the input sources is one, the video frame pictures comprise two continuous video frame pictures in the input source, one of the two video frame pictures comprises the left-eye video picture, the other of the two video frame pictures comprises the right-eye video picture, the frame frequency range of the input sources is 48-150Hz, and when the frame frequency threshold is 100Hz, the range of the frequency multiplication factor is 1-3; when the number of the input sources is two, the number of the video frame pictures is also two, the two input sources correspondingly comprise the two video frame pictures one by one, one of the two video frame pictures comprises the left-eye video picture, the other of the two video frame pictures comprises the right-eye video picture, the frame frequency range of the input sources is 24-75Hz, and when the frame frequency threshold is 100Hz, the range of the frequency multiplication factor is 2-6.

In another aspect, an embodiment of the present invention provides a display controller, including: the system comprises a first microcontroller and a first programmable logic device connected with the first microcontroller; wherein the first programmable logic device is to: the method comprises the steps that under the control of a first microcontroller, a video frame picture including a left eye video picture and a right eye video picture of an input source, an input source frame frequency and a video format are obtained, left eye image data and right eye image data are respectively read from the left eye video picture and the right eye video picture of the video frame picture, the output frequency of the left eye image data and the right eye image data is obtained according to a frame frequency threshold, the input source frame frequency and the video format, so that the output frame frequency is not smaller than the frame frequency threshold, and the left eye image data and the right eye image data are output according to the output frequency.

In one embodiment of the invention, the display controller further comprises a volatile memory coupled to the first programmable logic device; the first programmable logic device includes: the video decoding module, the image storage control module, the multiple frequency processing module and the image output module; the video decoding module is configured to decode the input source to obtain the video frame picture including the left-eye video picture and the right-eye video picture, the input source frame frequency, and the video format; the image storage control module is used for respectively reading the left eye image data and the right eye image data from the left eye video image and the right eye video image and storing the left eye image data and the right eye image data into the volatile memory; the frequency multiplication processing module is used for obtaining the output frequency according to the frame frequency threshold, the input source frame frequency and the video format so as to enable the output frequency not to be smaller than the frame frequency threshold; the image output module is used for reading the left eye image data and the right eye image data from the volatile memory under the control of the image storage control module, and packing and outputting the left eye image data and the right eye image data according to the output frequency.

In another aspect, an embodiment of the present invention provides a display control card, including: the second microcontroller and a second programmable logic device connected with the second microcontroller; wherein the second programmable logic device is to: under the control of the second microcontroller, acquiring and analyzing a frame image data packet sent by a display controller to obtain frame image data containing left-eye image data and right-eye image data and a field frequency and a video format of the frame image data, obtaining an output frequency of the frame image data according to a frame frequency threshold, the field frequency of the frame image data and the video format to enable the output frame frequency not to be smaller than the frame frequency threshold, and generating a driving time sequence according to the output frequency and outputting the driving time sequence together with the frame image data to a display screen.

In one embodiment of the invention, the display control card further comprises a volatile memory connected with the second programmable logic device; the second programmable logic device includes: the device comprises a data analysis module, a data storage control module, a multiple frequency processing module and a driving time sequence generation module; the data analysis module is used for analyzing the frame image data packet to obtain the frame image data containing the left eye image data and the right eye image data, the field frequency and the video format; the data storage control module is used for storing the frame image data to the volatile memory; the frequency multiplication processing module is used for determining the output frequency according to the frame frequency threshold, the field frequency and the video format; the driving time sequence generating module is used for generating a driving time sequence according to the output frequency, reading the frame image data from the volatile memory and outputting the driving time sequence and the frame image data to the display screen.

In another aspect, an embodiment of the present invention provides a display control system, including: the display controller and the display control card are connected with the display controller;

wherein the display controller is to: the method comprises the steps of obtaining a video frame picture including a left eye video picture and a right eye video picture of an input source, an input source frame frequency and a video format, respectively reading left eye image data and right eye image data from the left eye video picture and the right eye video picture of the video frame picture, carrying out first frequency doubling processing on the input source frame frequency based on the video format and a preset first frequency doubling factor to obtain a first frequency-doubled frame frequency, packaging the left eye image data and the right eye image data according to the first frequency-doubled frame frequency to obtain a frame image data packet, and sending the frame image data packet to a display control card;

the display control card is used for: analyzing the received frame image data packet to obtain frame image data for protecting the left eye image data and the right eye image data, obtaining the output frequency of the frame image data according to the first frequency-doubled frame frequency and the frame frequency threshold value to enable the output frame frequency not to be smaller than the frame frequency threshold value, generating a driving time sequence according to the output frequency, and sending the driving time sequence, the left eye image data and the right eye image data to a display screen for displaying.

One or more of the above technical solutions may have the following advantages or beneficial effects: according to the embodiment of the invention, the output frequency of the left eye image data and the right eye image data is obtained according to the frame frequency threshold and the video format, the output frame frequency is not less than the frame frequency threshold, and the left eye image and the right eye image in the video frame picture of the input source video are displayed at the output frequency not less than the frame frequency threshold, namely the 3D display of the video can be controlled through the frame frequency threshold, so that the problem of low-gray flicker in the 3D display of the cinema in the prior art is solved, and the 3D display effect is improved. In addition, the embodiment of the invention realizes the video display method provided by the invention through a plurality of different modes, is compatible with a display controller or a display control card in the prior art, and saves the cost. Furthermore, multiple frequency multiplication processing is carried out on the display control card, the transmission bandwidth of data transmitted to the display control card by the display controller is not wasted, the real-time performance of data transmission is improved, the 3D display effect is more favorably improved, and meanwhile the loading capacity of the display controller is also expanded in a phase-changing manner.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a display system according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a display control system in fig. 1.

Fig. 3a is a schematic structural diagram of a display controller in fig. 2.

Fig. 3b is a schematic diagram of a data processing procedure of the display controller shown in fig. 3 a.

FIG. 4a is a schematic structural diagram of a display control card in FIG. 2.

Fig. 4b is a schematic diagram of a data processing process of the display controller card shown in fig. 4 a.

Fig. 5 is a flowchart illustrating a video display method according to an embodiment of the present invention.

Fig. 6 is a detailed flowchart of step S17 in fig. 5.

Fig. 7 is a schematic diagram illustrating a video format of an input source and a corresponding image data output mode in the shutter 3D mode.

Fig. 8 is a schematic diagram illustrating a video format and an image data output mode of another input source in the shutter 3D mode.

Fig. 9 is a schematic diagram illustrating a video format and an image data output mode of another input source in the shutter 3D mode.

Fig. 10 is a schematic diagram illustrating a video format of an input source in the polarization 3D mode and a corresponding image data output method.

Fig. 11 is a schematic diagram of one data format of combined left-eye image data and right-eye image data in the polarization 3D mode.

Fig. 12 is a schematic diagram of a video format and an image data output mode of another input source in the polarization 3D mode.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

[ first embodiment ] A method for manufacturing a semiconductor device

As shown in fig. 1, an embodiment of the present invention provides adisplay system 10. Thedisplay system 10 is applicable to the playback and control of 3D movies in theaters, which serve as playback control devices for 3D movies.

Specifically, as shown in fig. 1, thedisplay system 10 includes: adisplay control system 100 and adisplay screen 300 connected to thedisplay control system 100. Further, as shown in fig. 2, thedisplay control system 100 includes, for example, adisplay controller 110 and adisplay control card 130. Thedisplay screen 300 is, for example, an LED display screen, and includes at least one LED lamp panel including at least one LED lamp bead. Of course, thedisplay system 10 may also include a front-end video processing device or a host computer such as a PC, a projection server (or called screen management system, SMS), etc. for providing an input source conforming to a 3D format, although the invention is not limited thereto.

Typically, as shown in fig. 3a, thedisplay controller 110 includes, for example, a microcontroller 111, a programmable logic device 113, and avolatile memory 115. The programmable logic device 113 is connected to the microcontroller 111 and thevolatile memory 115, respectively. The Programmable logic device 113 is, for example, an FPGA (Field Programmable Gate Array), and is mainly used to decode, process, and output processed image data and parameters to thedisplay control card 130 from an external input source such as an upper computer or a front-stage video processing device under the control of the microcontroller 111. The microcontroller 111 may be, for example, an MCU, which is mainly used for loading a programmable logic device program, communicating with the outside, transmitting control instructions, and the like. Thevolatile memory 115, which may be, for example, SDRAM or DDR, is used to buffer data during operation of thedisplay controller 110, and in particular the programmable logic device 113. Of course, thedisplay controller 110 may also include other components, such as a video input interface, such as an HDMI interface, a video output interface, such as a DVI interface, etc., which should not be construed as limiting the invention. More specifically, as shown in fig. 3b, the programmable logic device 113 may, for example, include: avideo decoding module 1131, an imagestorage control module 1132, a multiplefrequency processing module 1133, and animage output module 1134.

As shown in fig. 4a, thedisplay control card 130 includes, for example, a microcontroller 131, a programmable logic device 133, and avolatile memory 135. The programmable logic device 133 is, for example, an FPGA, and is mainly used for performing image data processing and the like on the frame image data sent by thedisplay controller 110 under the control of the microcontroller 131, such as converting the image data into display data and control signals and outputting the display data and control signals to thedisplay screen 300 for display. The microcontroller 131 may be, for example, an MCU, which is mainly used for loading a programmable logic device program, communicating with the outside, transmitting control instructions, and the like.Volatile memory 135, which may be, for example, SDRAM or DDR, is used to buffer data during operation ofdisplay control card 130, and in particular programmable logic device 133. Of course, thedisplay control card 130 may further include other components, such as an image data input interface, for example, an ethernet interface, a display data and control signal interface, etc., which is not limited by the invention.

The 3D film playing and controlling device in the prior art, such as a display system, has the problems that the display effect of a low-gray-scale image is not ideal when the frequency is low, such as below 60Hz, and the flicker is serious when a user watches the image. Therefore, the display system provided by the embodiment of the invention solves the problem. To realize that the user (viewer) sees the 3D image display, thedisplay system 10 outputs and displays the left-eye image and the right-eye image, and then the human eyes receive the two images and combine the two images into a whole in the brain to realize the 3D visual effect.

To solve this problem, the embodiment of the present invention may be implemented mainly by modifying thedisplay system 10. Specifically, as shown in fig. 5, an embodiment of the present invention provides a video display method, including:

s11: acquiring video frame pictures of an input source, wherein the video frame pictures comprise a left-eye video picture and a right-eye video picture;

s13: acquiring the input source frame frequency and the video format of the input source;

s15: respectively reading left eye image data and right eye image data from the left eye video image and the right eye video image of the video frame image;

s17: obtaining the output frequency of the left eye image data and the right eye image data according to a frame frequency threshold, the input source frame frequency and the video format so that the output frame frequency is not less than the frame frequency threshold; and

s19: and outputting and displaying the left eye image data and the right eye image data according to the output frequency.

According to the embodiment of the invention, the output frequency of the left eye image data and the right eye image data is obtained according to the frame frequency threshold and the video format, the output frame frequency is not less than the frame frequency threshold, and the left eye image and the right eye image in the video frame picture of the input source video are displayed at the output frequency not less than the frame frequency threshold, namely the 3D display of the video can be controlled through the frame frequency threshold, so that the problem of low-gray flicker in the 3D display of the cinema in the prior art is solved, the 3D display effect is improved, and the user experience is also improved. In addition, in this way, thedisplay system 10 may flexibly determine the output frequencies of the left-eye image and the right-eye image according to the video format, the frame frequency threshold, and the input source frame frequency, so as to avoid the above-mentioned problem caused by determining and performing double frequency or non-double frequency on the input source frame frequency according to the video format in the prior art.

More specifically, as shown in fig. 6, step S17 includes, for example, the steps of:

s171: comparing the input source frame frequency with the frame frequency threshold value based on the video format to obtain a frequency multiplication factor;

s173: and obtaining the output frequency according to the frequency multiplication factor and the input source frame frequency.

In this way,display system 10 may determine a multiplication factor based on the format of the input source and comparing the input source frame frequency to the frame frequency threshold, and then take the product of the multiplication factor and the input source frame frequency as the output frequency.

In addition, the process of frequency doubling the input source frame frequency may be implemented on thedisplay controller 110 and/or thedisplay control card 130 of thedisplay system 10. Which will be described separately below.

First, a process in which thedisplay controller 110 performs frequency doubling determination on the input source frame frequency will be described.

The input source is provided by a front-end video processing device or an upper computer.

As shown in fig. 3b, under the control of the microcontroller 111, the video decoding module 1131 of the programmable logic device 113 in the display controller 110 performs decoding processing on the received input source to obtain a video frame picture including a left-eye video picture and a right-eye video picture, an input source frame frequency, and a video format of the video source; the image storage control module 1132 respectively reads left eye image data and right eye image data from the left eye video picture and the right eye video picture of the video frame picture according to the video format, and temporarily stores the left eye image data and the right eye image data into a volatile memory; then, the multiple frequency processing module 1133 of the programmable logic device 113 of the display controller 110 obtains the output frequencies of the left eye image data and the right eye image data according to a frame frequency threshold, an input source frame frequency, and the video format, so that the output frame frequency is not less than the frame frequency threshold, and finally, the image output module 1134 of the programmable logic device 113 of the display controller 110 reads the left eye image data and the right eye image data from the nonvolatile memory under the control of the image storage control module, and packs and outputs the left eye image data and the right eye image data to the display control card 130 according to the output frequencies.

Specifically, the obtaining, by the programmable logic device 113 of thedisplay controller 110, the output frequencies of the left eye image data and the right eye image data according to the frame frequency threshold, the input source frame frequency, and the video format such that the output frame frequency is not less than the frame frequency threshold includes: the programmable logic device 113 of thedisplay controller 110 compares the frame rate threshold to the input source frame rate based on the video format of the input source; when the input source frame frequency is smaller than the frame frequency threshold, the display controller obtains a first frame frequency difference value according to the input source frame frequency and the frame frequency threshold, determines a frequency multiplication factor according to the first frequency difference value, and obtains the output frequency according to the frequency multiplication factor; when the input source frame frequency is not less than the frame frequency threshold, the programmable logic device 113 of thedisplay controller 110 takes the input source frame frequency as the output frequency, which in this case corresponds to the multiplication factor of 1. It should be noted that the frame rate threshold can be determined according to the actual situation of the user, for example, when the output frame rate (or called output frame rate) is over 100Hz, the 3D display effect is significantly improved. Preferably, the output frame frequency is 120Hz or more, and the 3D display effect is better. Therefore, the frame rate threshold may be 100Hz, preferably 120 Hz.

For shutter 3D, thedisplay controller 110 may have various implementations.

As shown in fig. 7, when the programmable logic device 113 of thedisplay controller 110 receives one video format as the input source, the video frame pictures including the left-eye video picture (L) and the right-eye video picture (L) are distributed left and right or up and down in the video frame picture. The programmable logic device 113 of the display controller (also called a sending card) 110 determines a frequency multiplication factor according to the frame frequency threshold and the video format, and then performs frequency multiplication processing on the input source frame frequency of the single input source to obtain an output frame frequency. Generally, the range of the frame frequency of the input source may be, for example, 24 to 75Hz, when the frame frequency threshold is 100Hz, the frequency doubling factor is determined according to the difference between the frame frequency threshold and the frame frequency of the input source, and the obtained range of the frequency doubling factor may be, for example, 2 to 6, so that the range of the output frame frequency of the image data output by the programmable logic device 113 of thedisplay controller 110 is 100 and 180Hz, as shown in table 1. Then, the programmable logic device 113 reads the corresponding image data from the volatile memory, such as SDRAM or DDR, according to the predetermined output mode and outputs the image data to thedisplay control card 130. The preset output mode here is, for example, a left-eye and right-eye priority output mode set by a user, and for example, the preset output mode includes a left-eye priority output mode and a right-eye priority output mode. In the left-eye priority output mode, when the programmable logic device 113 outputs image data, the odd-numbered frames output left-eye image data, and the even-numbered frames output right-eye image data. The right-eye preferential output mode is opposite thereto.

TABLE 1 first correspondence table of input source frame frequency and frequency multiplication factor and output frame frequency

Input source frame frequency (Hz)	24	25	30	50	60	75
							Frequency multiplication factor	6	6	6	2	2	2
Output frame frequency (Hz)	144	150	180	100	120	150

As shown in fig. 8, when the video format of the input source input to the programmable logic device 113 is 1 input source, that is, a single input source, the video frame pictures include two consecutive video frame pictures in the input source, one of the two video frame pictures includes the left-eye video picture (L), and the other of the two video frame pictures includes the right-eye video picture (R), the programmable logic device 113 determines a frequency multiplication factor according to the frame frequency threshold, the input source frame frequency, and the video format, and then performs frequency multiplication on the input source frame frequency of the single input source to obtain an output frame frequency. In general, the range of the input source frame frequency in this case may be, for example, 48 to 150Hz, when the frame frequency threshold is 100Hz, the frequency doubling factor is determined according to the difference between the frame frequency threshold and the input source frame frequency, and the obtained range of the frequency doubling factor may be, for example, 1 to 3, so that the range of the output frame frequency of the image data output by thedisplay controller 110 is 100 and 180Hz, as shown in table 2. Then, the programmable logic device 113 reads the image data from the volatile memory, such as SDRAM or DDR, according to the predetermined output mode and outputs the image data to thedisplay control card 130. The preset output mode here is determined, for example, according to the arrangement mode of the left-eye video picture and the right-eye video picture of the input source. For example, the left-eye video frame and the right-eye video frame in the input source are sequentially alternated, and the preset output mode is that when the programmable logic device 113 outputs the image data, the left-eye image data is output first, and then the right-eye image data is output and sequentially alternated. For another example, the right-eye video frame in the input source is sequentially alternated between the front-eye video frame and the rear-eye video frame, and the preset output mode is that when the programmable logic device 113 outputs the image data, the right-eye image data is output first, and then the left-eye image data is output and sequentially alternated.

TABLE 2 second table of input source frame frequency and frequency multiplication factor and output frame frequency

Input source frame frequency (Hz)	48	50	60	100	120	150
							Frequency multiplication factor	3	3	3	1	1	1
Output frame frequency (Hz)	144	150	180	100	120	150

In addition, as shown in fig. 9, when the number of the video formats received by the programmable logic device 113 is two, the number of the video frame pictures is also two, the two input sources correspond to each other one by one and include the two video frame pictures, one of the two video frame pictures includes the left-eye video picture, and the other of the two video frame pictures includes the right-eye video picture. The programmable logic device 113 determines a frequency multiplication factor according to the frame frequency threshold, the input source frame frequency and the video format, and then performs frequency multiplication on the input source frame frequency of the single input source to be used as an output frame frequency. In general, the range of the input source frame frequency in this case may be, for example, 24 to 75Hz, and when the frame frequency threshold is 100Hz, the frequency multiplication factor is determined according to the difference between the frame frequency threshold and the frame frequency of the input source, and the obtained frequency multiplication factor may be, for example, 2 to 6, as shown in table 1. Then, the programmable logic device 113 reads the corresponding image data from the volatile memory, such as SDRAM or DDR, according to the predetermined output mode and outputs the image data to thedisplay control card 130. The preset output mode here is, for example, a left-eye and right-eye priority output mode set by a user, and for example, the preset output mode includes a left-eye priority output mode and a right-eye priority output mode. When the left-eye priority output mode is that the programmable logic device 113 outputs image data, the left-eye image data corresponding to the input source including the left-eye video image is read and output, and then the left-eye image data corresponding to the input source including the left-eye video image is read and output. The right-eye preferential output mode is opposite thereto.

For polarized 3D, the programmable logic device 113 of thedisplay controller 110 may also have a corresponding implementation.

For example, as shown in fig. 10, when the number of the input sources is one in the video format received by the programmable logic device 113, the video frame frames including the left-eye video frame (L) and the right-eye video frame (L) are distributed left and right or up and down in the video frame. The programmable logic device 113 determines a frequency multiplication factor according to the frame frequency threshold, the input source frame frequency and the video format, and then performs frequency multiplication on the input source frame frequency of the single input source to be used as an output frame frequency. Generally, the range of the frame frequency of the input source may be, for example, 24 to 75Hz, when the frame frequency threshold is 100Hz, the frequency multiplication factor is determined according to the difference between the frame frequency threshold and the frame frequency of the input source, and the obtained range of the frequency multiplication factor may be, for example, 2 to 6, so that the range of the output frame frequency of the image data output by the programmable logic device 113 is 100 and 180Hz, which is specifically shown in table 1. Then, the programmable logic device 113 reads the corresponding left-eye image data and right-eye image data from the volatile memory, such as SDRAM or DDR, and combines them, and outputs them to thedisplay control card 130. For example, the resolution of the left-eye image data and the right-eye image data is 2048 × 1080, that is, 2048 pixels (pixel1-pixel2048) in the width direction and 1080 lines (line1-line1080) in the height direction. The combination here may be, for example, that the programmable logic device 113 separately reads and combines the first pixel (L1p1) of the first line in the left-eye image data and the first pixel (R1p1) of the first line in the right-eye image data, then reads and combines the second pixel (L1p2) of the first line in the left-eye image data and the second pixel (R1p2) of the first line in the right-eye image data, and combines and arranges the two after L1p1, R1p1, and repeats until the last pixels R2p2048 and L2p2048 are all read and combined. The data format of the combined image data can be seen in fig. 11. Of course, the data format shown in fig. 11 is only one example, and other data formats may be obtained by combination, which is not described herein again.

As shown in fig. 12, when the number of the video formats received by the programmable logic device 113 is two, the number of the video frame pictures is also two, the two input sources correspond to each other one by one and include the two video frame pictures, one of the two video frame pictures includes the left-eye video picture, and the other of the two video frame pictures includes the right-eye video picture. The programmable logic device 113 determines a frequency multiplication factor according to the frame frequency threshold, the input source frame frequency and the video format, and then performs frequency multiplication on the input source frame frequency of the single input source to be used as an output frame frequency. In general, the range of the input source frame frequency in this case may be, for example, 24 to 75Hz, and when the frame frequency threshold is 100Hz, the frequency multiplication factor is determined according to the difference between the frame frequency threshold and the input source frame frequency, and the obtained frequency multiplication factor may be, for example, 2 to 6, as shown in table 1. Then, the programmable logic device 113 reads the corresponding image data from the volatile memory such as SDRAM or DDR and outputs the image data to thedisplay control card 130. For example, the resolution of the left-eye image data and the right-eye image data is 2048 × 1080, that is, 2048 pixels (pixels) in the width direction and 1080 lines (lines) in the height direction. The combination here may be, for example, that the programmable logic device 113 separately reads the first pixel data (L1p1) of the first line in the left-eye image data and the first pixel data (R1p1) of the first line in the right-eye image data, combines them together, then reads the second pixel data (L1p2) of the first line in the left-eye image data and the second pixel data (R1p2) of the first line in the right-eye image data, combines them together and arranges them after L1p1, R1p1, and repeats until the last pixel data R2p2048 and L2p2048 are completely read and combined. The data format of the combined image data can be seen in fig. 11. Of course, the data format shown in fig. 11 is only one example, and other data formats may be obtained by combination, which is not described herein again.

Then, the programmable logic device 133 of thedisplay control card 130 processes the combined left-eye image data and the right-eye image data sent by thedisplay controller 110 to obtain display data and control signals (including signals such as driving timing) and sends the display data and the control signals to thedisplay screen 300 for display.

It is worth mentioning here that for the shutter 3D mode, thedisplay control system 100 may further include a 3D emitter (not shown in the figure). The 3D transmitter is connected with thedisplay controller 110 to receive the field synchronizing signal output by thedisplay controller 110, and generates a control signal according to the field synchronizing signal and sends the control signal to the 3D glasses worn by the viewer or the user to control the left glasses lens and the right glasses lens on the 3D glasses to open and close according to a preset mode, so that after the picture seen by the glasses of the viewer, the two images are combined into a whole in the brain to realize the 3D visual effect.

Thus, the video display method provided by the present invention can be implemented by matching thedisplay controller 110 provided by the present invention with a mature display control card in the prior art (i.e., a display control card that does not perform frequency doubling), that is, the video display method provided by the embodiment of the present invention is implemented by improving thedisplay controller 110 in the above-mentioned embodiment, and is compatible with a mature display control card in the prior art (i.e., a display control card that does not perform frequency doubling on the input source frame frequency).

In addition, in another embodiment of the present invention, the step S17 in the video display method may not be implemented by the programmable logic device 113 of thedisplay controller 110, and may be implemented by the programmable logic device 133 of thedisplay control card 130, so that the bandwidth of the data transmitted from thedisplay controller 110 to thedisplay control card 130 is not wasted, the real-time performance of data transmission is improved, and the 3D display effect is further improved. For example, when the output frequency of the output image data of thedisplay controller 110 is 30Hz, 130 ten thousand pixel points can be carried by the image data transmitted by a single transmission cable, for example, a network cable, and if the output frequency obtained after the frequency doubling processing is performed by thedisplay controller 110 is 60Hz, only 65 ten thousand pixel points can be carried by the image data transmitted by a single network cable, that is, the transmission bandwidth is wasted when the frequency doubling processing is performed on thedisplay controller 110. And the frequency doubling processing is performed on thedisplay control card 130, and the processed data is directly sent to the display screen, so that the transmission bandwidth is not wasted. That is, the steps S11, S13, S15 are completed in the programmable logic device 113 of thedisplay controller 110, and the input source frame rate of the input source is output to the programmable logic device 133 of thedisplay control card 130, while the steps S17 and S19 are performed by the programmable logic device 133.

Specifically, as shown in fig. 4b, thedata unpacking module 1331 of the programmable logic device 133 on thedisplay control card 130 receives a frame image data packet sent by thedisplay controller 110 to obtain frame image data and a field frequency (i.e., an input source frame frequency) of the frame image data, where the frame image data includes left-eye image data and right-eye image data; thedata storage module 1332 stores the frame image data in thevolatile memory 135; theimage processing module 1335 reads the frame image data from thevolatile memory 135, performs processing such as Gamma conversion, luminance and chrominance correction, and luminance and dark line adjustment on the frame image data to obtain processed frame image data, and stores the processed frame image data in thevolatile memory 135 again; the multiplefrequency processing module 1333 obtains an output frequency of the processed frame image data according to a frame frequency threshold, the field frequency and the video format; the drivingtiming generation module 1334 generates a corresponding driving timing according to the output frequency, and reads the processed frame image data from thevolatile memory 135 and sends the frame image data and the driving timing to a display screen for displaying.

Specifically, the obtaining, by the programmable logic device 133, the output frequencies of the left-eye image data and the right-eye image data according to a frame frequency threshold, an input source frame frequency (i.e., a field frequency of frame image data), and the video format so that the output frame frequency is not less than the frame frequency threshold includes: programmable logic device 133 compares the frame rate threshold to the input source frame rate based on the video format of the input source; when the input source frame frequency is smaller than the frame frequency threshold, the programmable logic device 133 obtains a second frequency difference value according to the input source frame frequency and the frame frequency threshold, determines a frequency multiplication factor according to the second frequency difference value, and obtains the output frequency according to the frequency multiplication factor and the input source frame frequency; when the input source frame frequency is not less than the frame frequency threshold, the programmable logic device 133 uses the input source frame frequency as the output frequency, which in this case corresponds to the frequency multiplication factor being 1. Finally, the programmable logic device 133 outputs the left-eye image data and the right-eye image data to thedisplay screen 300 according to the output frequency to implement 3D display.

Thus, the video display method provided by the present invention can be implemented by matching thedisplay control card 130 provided by the present invention with a mature display controller in the prior art (i.e., a display controller that does not amplify the input source frame frequency), that is, the video display method provided by the embodiment of the present invention is implemented by improving thedisplay control card 130 in the above-mentioned embodiment, and is compatible with the mature display controller in the prior art (i.e., a display controller that does not amplify the input source frame frequency).

Furthermore, in another embodiment of the present invention, for example, for the polarized 3D mode, the step S17 of the video display method may also be implemented by the programmable logic device 113 of thedisplay controller 110 and the programmable logic device 133 of thedisplay control card 130. That is, steps S11, S13, and S15 are completed in the programmable logic device 113 of thedisplay controller 110, step S17 is completed by the programmable logic device 113 and the programmable logic device 133, and step S19 is completed by the programmable logic device 133. Specifically, the input frame rate of the input source is output to the programmable logic device 133 of thedisplay control card 130, and steps S17 and S19 are performed by the programmable logic device 133. Specifically, the programmable logic device 113 obtains a video frame image of an input source including a left-eye video image and a right-eye video image, obtains an input source frame frequency and a video format of the input source, and obtains left-eye image data and right-eye image data from the left-eye video image and the right-eye video image of the video frame image respectively, and combines the left-eye image data and the right-eye image data to obtain combined left-eye image data and right-eye image data, and then the programmable logic device 113 performs a first frequency doubling process on the input source frame frequency based on the video format and a preset first frequency doubling factor to obtain a first frequency-doubled frame frequency. Here, the preset first frequency multiplication factor is equal to 2, that is, the programmable logic device 113 in thedisplay controller 110 first performs a doubling process on the input source frame frequency. That is, the first multiplied frame frequency is equal to the first multiplication factor × the input source frame frequency. The programmable logic device 113 then packages the first frequency-multiplied frame frequency and the combined left-eye image data and right-eye image data and sends the packaged data to thedisplay control card 130. Then, thedisplay control card 130 compares the first frequency-multiplied frame frequency with the frame frequency threshold. Specifically, when the first frequency-multiplied frame frequency is smaller than the frame frequency threshold, the programmable logic device 133 of thedisplay control card 130 obtains a third frequency difference according to the first frequency-multiplied frame frequency and the frame frequency threshold, determines a second frequency multiplication factor according to the third frequency difference, and obtains the output frequency according to the second frequency multiplication factor and the first frequency-multiplied frame frequency. Wherein, the output frequency is the second frequency multiplication factor multiplied by the first frequency multiplication frame frequency. When the first frequency-doubled frame frequency is not less than the frame frequency threshold, the programmable logic device 133 uses the first frequency-doubled frame frequency as the output frequency, which is also equivalent to a second frequency multiplication factor equal to 1. Finally, the programmable logic device 133 generates a driving timing sequence according to the output frequency, and outputs the driving timing sequence and the combined left-eye image data and right-eye image data to thedisplay screen 300 together after processing, so as to implement 3D display. Typically, the input source frame frequency in this case may be in the range of 24-75Hz, for example, when the frame frequency threshold is 100Hz, the first frequency multiplication factor is equal to 2, and the second frequency multiplication factor is in the range of 1-3, so that the total frequency multiplication factor of both thedisplay controller 110 and thedisplay control card 130 is in the range of 2-6, as detailed in table 3.

TABLE 3 first correspondence table of input source frame frequency and frequency multiplication factor and output frame frequency

Input source frame frequency (Hz)	24	25	30	50	60	75
							First frequency multiplication factor	2	2	2	2	2	2
Second frequency multiplication factor	3	3	3	1	1	1
							Total multiplication factor	6	6	6	2	2	2
Output frame frequency (Hz)	144	150	180	100	120	150

Thus, the video display method provided by the present invention can be implemented by matching thedisplay control card 130 provided by the present invention with a display controller having a frequency doubling function (i.e., a function of doubling the input source frame frequency), which is in the prior art, i.e., the video display method provided by the embodiment of the present invention is implemented by improving thedisplay control card 130 in the above-mentioned embodiment, and is compatible with the display controller having the frequency doubling function (i.e., a function of doubling the input source frame frequency).

It should be noted here that, for the polarized 3D mode, since thedisplay controller 110 has combined and spliced the left-eye image data and the right-eye image data according to the output requirement, the frequency doubling manner of the wholedisplay control system 100 may be in various manners, and the above embodiments are only some examples thereof, and the remaining manners are only to satisfy that the product of the first frequency doubling factor of thedisplay controller 110 and the second frequency doubling factor of thedisplay control card 130 is equal to the total frequency doubling factor.

In summary, the embodiment of the present invention solves the problem of low gray flicker in the cinema 3D display in the prior art by obtaining the output frequencies of the left eye image data and the right eye image data according to the frame frequency threshold, the input source frame frequency, and the video format, making the output frame frequency not less than the frame frequency threshold, and making the left eye image and the right eye image in the video frame picture of the input source video displayed at the output frequency not less than the frame frequency threshold. In addition, the embodiment of the invention realizes the video display method provided by the invention through a plurality of different modes, is compatible with a display controller or a display control card in the prior art, and saves the cost.

In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present invention, and the technical solutions of the embodiments can be arbitrarily combined and collocated without conflict between technical features and structural contradictions, which do not violate the purpose of the present invention.

In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a division of one logic function, and an actual implementation may have another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (11)

1. A video display method, comprising:

acquiring video frame pictures of an input source, wherein the video frame pictures comprise a left-eye video picture and a right-eye video picture;

acquiring the input source frame frequency and the video format of the input source;

respectively reading left eye image data and right eye image data from the left eye video image and the right eye video image of the video frame image;

obtaining the output frequency of the left eye image data and the right eye image data according to a frame frequency threshold, the input source frame frequency and the video format so that the output frame frequency is not less than the frame frequency threshold; and

and outputting and displaying the left eye image data and the right eye image data according to the output frequency.

2. The video display method of claim 1, wherein the video display method is applied to a display control system comprising a display controller;

wherein the obtaining the output frequencies of the left-eye image data and the right-eye image data according to the frame frequency threshold, the input source frame frequency, and the video format so that the output frame frequency is not less than the frame frequency threshold includes:

the display controller compares the frame rate threshold to the input source frame rate based on the video format of the input source;

when the input source frame frequency is smaller than the frame frequency threshold, the display controller obtains a first frequency difference value according to the input source frame frequency and the frame frequency threshold, determines a frequency multiplication factor according to the first frequency difference value, and obtains the output frequency according to the frequency multiplication factor;

when the input source frame frequency is not less than the frame frequency threshold, the display controller takes the input source frame frequency as the output frequency.

3. The video display method according to claim 1, wherein the video display method is applied to a display control system including a display control card;

wherein the obtaining the output frequencies of the left-eye image data and the right-eye image data according to the frame frequency threshold, the input source frame frequency, and the video format so that the output frame frequency is not less than the frame frequency threshold includes:

the display control card compares the frame frequency threshold value with the frame frequency of the input source based on the video format of the input source;

when the input source frame frequency is smaller than the frame frequency threshold, the display control card determines a second frequency difference value according to the fact that the input source frame frequency is smaller than the frame frequency threshold, determines a frequency multiplication factor according to the second frequency difference value, and obtains the output frequency according to the frequency multiplication factor and the input source frame frequency;

and when the input source frame frequency is not less than the frame frequency threshold, the display control card takes the input source frame frequency as the output frequency.

4. The video display method according to claim 1, wherein the video display method is applied to a display control system comprising a display controller and a display control card connected to the display controller;

wherein the obtaining the output frequencies of the left-eye image data and the right-eye image data according to the frame frequency threshold, the input source frame frequency, and the video format so that the output frame frequency is not less than the frame frequency threshold includes:

the display controller performs first frequency doubling processing on the input source frame frequency based on the video format and a preset first frequency doubling factor to obtain a first frequency-doubled frame frequency, and sends the first frequency-doubled frame frequency to the display control card;

the display control card compares the first frequency-doubled frame frequency with the frame frequency threshold;

when the first frequency-doubled frame frequency is smaller than the frame frequency threshold, the display control card obtains a third frequency difference value according to the first frequency-doubled frame frequency and the frame frequency threshold, determines a second frequency multiplication factor according to the third frequency difference value, and obtains the output frequency according to the second frequency multiplication factor and the first frequency-doubled frame frequency;

and when the first frequency-doubled frame frequency is not less than the frame frequency threshold, the display control card takes the first frequency-doubled frame frequency as the output frequency.

5. The video display method according to any one of claims 1 to 4, wherein said deriving the output frequencies of the left eye image data and the right eye image data so that the output frame rate is not less than the frame rate threshold according to the frame rate threshold, the input source frame rate, and the video format comprises:

comparing the input source frame frequency with the frame frequency threshold value based on the video format to obtain a frequency multiplication factor; and

and obtaining the output frequency according to the frequency multiplication factor and the input source frame frequency.

6. The video display method according to claim 5, wherein the video format includes the number of the input sources and the form of the video frame picture; the comparing the input source frame frequency and the frame frequency threshold value based on the video format to obtain a frequency multiplication factor comprises:

when the number of the input sources is one, the left-eye video picture and the right-eye video picture are distributed in the video frame picture in a left-right or up-down mode, the frame frequency range of the input sources is 24-75Hz, and the frame frequency threshold is 100Hz, the range of the frequency multiplication factor is 2-6;

when the number of the input sources is one, the video frame pictures comprise two continuous video frame pictures in the input source, one of the two video frame pictures comprises the left-eye video picture, the other of the two video frame pictures comprises the right-eye video picture, the frame frequency range of the input sources is 48-150Hz, and when the frame frequency threshold is 100Hz, the range of the frequency multiplication factor is 1-3;

when the number of the input sources is two, the number of the video frame pictures is also two, the two input sources correspondingly comprise the two video frame pictures one by one, one of the two video frame pictures comprises the left-eye video picture, the other of the two video frame pictures comprises the right-eye video picture, the frame frequency range of the input sources is 24-75Hz, and when the frame frequency threshold is 100Hz, the range of the frequency multiplication factor is 2-6.

7. A display controller, comprising: the system comprises a first microcontroller and a first programmable logic device connected with the first microcontroller;

wherein the first programmable logic device is to: the method comprises the steps that under the control of a first microcontroller, a video frame picture including a left eye video picture and a right eye video picture of an input source, an input source frame frequency and a video format are obtained, left eye image data and right eye image data are respectively read from the left eye video picture and the right eye video picture of the video frame picture, the output frequency of the left eye image data and the right eye image data is obtained according to a frame frequency threshold, the input source frame frequency and the video format, so that the output frame frequency is not smaller than the frame frequency threshold, and the left eye image data and the right eye image data are output according to the output frequency.

8. The display controller of claim 7, wherein the display controller further comprises a volatile memory coupled to the first programmable logic device; the first programmable logic device includes: the video decoding module, the image storage control module, the multiple frequency processing module and the image output module; wherein,

the video decoding module is used for decoding the input source to obtain the video frame picture including the left-eye video picture and the right-eye video picture, the input source frame frequency and the video format;

the image storage control module is used for respectively reading the left eye image data and the right eye image data from the left eye video image and the right eye video image and storing the left eye image data and the right eye image data into the volatile memory;

the frequency multiplication processing module is used for obtaining the output frequency according to the frame frequency threshold, the input source frame frequency and the video format so as to enable the output frequency not to be smaller than the frame frequency threshold;

the image output module is used for reading the left eye image data and the right eye image data from the volatile memory under the control of the image storage control module, and packing and outputting the left eye image data and the right eye image data according to the output frequency.

9. A display control card, comprising: the second microcontroller and a second programmable logic device connected with the second microcontroller;

wherein the second programmable logic device is to: under the control of the second microcontroller, acquiring and analyzing a frame image data packet sent by a display controller to obtain frame image data containing left-eye image data and right-eye image data and a field frequency and a video format of the frame image data, obtaining an output frequency of the frame image data according to a frame frequency threshold, the field frequency of the frame image data and the video format to enable the output frame frequency not to be smaller than the frame frequency threshold, and generating a driving time sequence according to the output frequency and outputting the driving time sequence together with the frame image data to a display screen.

10. The display control card of claim 9, further comprising a volatile memory connected to the second programmable logic device; the second programmable logic device includes: the device comprises a data analysis module, a data storage control module, a multiple frequency processing module and a driving time sequence generation module; wherein,

the data analysis module is used for analyzing the frame image data packet to obtain the frame image data containing the left eye image data and the right eye image data, the field frequency and the video format;

the data storage control module is used for storing the frame image data to the volatile memory;

the frequency multiplication processing module is used for determining the output frequency according to the frame frequency threshold, the field frequency and the video format;

the driving time sequence generating module is used for generating a driving time sequence according to the output frequency, reading the frame image data from the volatile memory and outputting the driving time sequence and the frame image data to the display screen.

11. A display control system, comprising: the display controller and the display control card are connected with the display controller;

wherein the display controller is to: the method comprises the steps of obtaining a video frame picture including a left eye video picture and a right eye video picture of an input source, an input source frame frequency and a video format, respectively reading left eye image data and right eye image data from the left eye video picture and the right eye video picture of the video frame picture, carrying out first frequency doubling processing on the input source frame frequency based on the video format and a preset first frequency doubling factor to obtain a first frequency-doubled frame frequency, packaging the left eye image data and the right eye image data according to the first frequency-doubled frame frequency to obtain a frame image data packet, and sending the frame image data packet to a display control card;

the display control card is used for: analyzing the received frame image data packet to obtain frame image data for protecting the left eye image data and the right eye image data, obtaining the output frequency of the frame image data according to the first frequency-doubled frame frequency and the frame frequency threshold value to enable the output frame frequency not to be smaller than the frame frequency threshold value, generating a driving time sequence according to the output frequency, and sending the driving time sequence, the left eye image data and the right eye image data to a display screen for displaying.

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