CN1877406A - Field sequential liquid crystal display device and driving method thereof - Google Patents

Abstract

Translated fromChinese

本发明提供了一种场序式液晶显示装置及其驱动方法，提供每一像素列的晶体管栅极充足的导通时间，并且可实现高分辨率的场序式液晶显示器。本发明实施例中的扫描驱动器，于每一扫描期间内同时扫描控制相邻的至少二像素列，以导通晶体管。同时于该扫描期间，分别传送图像数据给上述的至少二像素列，使得像素列内的电容可以根据图像数据作充电。The present invention provides a field sequential liquid crystal display device and a driving method thereof, which provides sufficient conduction time for the transistor gate of each pixel column and can realize a high-resolution field sequential liquid crystal display. The scanning driver in the embodiment of the present invention simultaneously scans and controls at least two adjacent pixel columns in each scanning period to turn on the transistors. At the same time, during the scanning period, image data is respectively transmitted to the above-mentioned at least two pixel columns, so that the capacitors in the pixel columns can be charged according to the image data.

Description

Field-sequential liquid crystal display and driving method thereof

Technical field

The present invention is relevant a kind of field sequence type Liquid Crystal Display And Method For Driving, particularly relevant for a kind of field sequence type LCD and driving method with many pixel columns of single scanning line traffic control.

Background technology

(Field-Sequential Color Liquid Crystal Display FSC-LCD) is a kind of display with plurality of advantages to the field sequence type LCD.Compared to traditional Thin Film Transistor-LCD (Thin Film Transistor Liquid Crystal Display, TFT-LCD), the field sequence type LCD is because have the back light of ruddiness, green glow, blue light, so do not need colored filter.Therefore, the light transmittance of panel can be than Thin Film Transistor-LCD height, and in addition, owing to there be not the absorption and the scattering of colored filter for polar biased light, contrast also relatively improves.

Fig. 1 shows known field sequence type LCD framework.As shown in the figure, wherein comprise liquid crystal panel 10, back lighting device 20, scanner driver 30, and data driver 40.Wherein liquid crystal panel 10 comprises common electrode (common electrode) 12, common electrode substrate (common electrodesubstrate) 14, liquid crystal layer 16, and matrix base plate (array substrate) 18.Back lighting device 20 has then comprised a multi-disc Polarizer 22 and a backlight 24.Backlight 24 can be launched the light source of redness, green, blue three kinds of colors.

Fig. 2 shows known field sequence type liquid crystal display-driving mode.As shown in the figure, each scanner driver 30 has many horizontal scan lines, and each bar sweep trace is coupled to the transistor gate of a column of pixels.And a data driver 40 has many longitudinal data lines, and each bar data line is coupled to the transistor source of an entire row of pixels.The sweep trace of scanner driver 30 can be sent trigger pip from top to bottom in regular turn, as shown by arrows, makes the transistor of column of pixels be switched on, and comes from the data that data driver 40 is sent with reception, and the electric capacity in each pixel is charged.

(under the sweep frequency of 60Hz, each demonstration time of opening picture frame (frame) is the 1/60=16.6 millisecond to the conventional thin film transistor LCD for Thin Film Transistor Liquid CrystalDisplay, type of drive TFT-LCD).If the hypothesis Thin Film Transistor-LCD has 1280 row *, 800 row (WXGA specification) individual pixels, then the ON time of each row pixel is the 16.6/800=20.75 microsecond.In 20.75 microseconds of each row pixel conducting, data driver can see through each bar data line and send data, and the electric capacity in the column of pixels is done effectively charging.

The signal timing diagram of Fig. 3 display field sequential liquid crystal display.Suppose that the field sequence type LCD has 1280 row *, 800 row (WXGA specification) individual pixels equally.And back lighting device to be divided into be four blocks, each block provides 1280 row * the light source of 200 a row pixel.The sweep frequency of known field sequence type LCD is 180Hz, so the demonstration time of each picture frame is the 1/180=5.6 millisecond.In these 5.6 milliseconds, need 2 milliseconds of reaction time as liquid crystal arrangement, and 2 milliseconds of times of opening as backlight, therefore only be left 1.6 milliseconds in order to drive the pixels of 200 row.So the ON time of each row pixel is the 1.6/200=8 microsecond.

In view of this, the utmost point need propose a kind of new field sequence type liquid crystal display-driving mode, the ON time of each rowed transistor grid abundance can be provided, and don't can increase circuit area, and can realize high-resolution field sequence type LCD.

Summary of the invention

One of purpose of the present invention can provide the ON time of each rowed transistor grid abundance, and can realize high-resolution field sequence type LCD at the driving method that proposes a kind of field sequence type LCD.

Another object of the present invention is to propose a kind of method of scanning lines that reduces scanner driver, can reduce the load of scanner driver.

According to above-described purpose, the invention provides a kind of field sequence type LCD, comprise liquid crystal panel, backlight, scanner driver, and data driver.Wherein liquid crystal panel comprises a plurality of pixels (pixel), and it is arranged in delegation's column matrix; Multi-strip scanning line, each sweep trace are to electrically connect at least two pixel columns; And the multi-group data line, each group data line to corresponding pixel column, and includes many data lines in each group data line in order to the transmitted image data, and it is connected to adjacent pixels in this pixel column respectively.Backlight then comprises a plurality of different colored light sources.Scanner driver is by the video picture scanning of above-mentioned multi-strip scanning line with the control pixel.And data driver is by above-mentioned multi-group data line transmitted image data, with video picture in corresponding pixel.

According to above-described purpose, the present invention also provides a kind of field sequence type LCD, comprises: liquid crystal panel comprises: a plurality of pixels, and it lines up the capable matrix of 2m row * n, and each wherein above-mentioned pixel comprises thin film transistor (TFT); M bar sweep trace, each this sweep trace is in order to control two adjacent pixel columns simultaneously, and wherein above-mentioned sweep trace is connected to the grid of this thin film transistor (TFT); And n group data line, wherein above-mentioned data line is connected to the source electrode of this thin film transistor (TFT), this each group data line to corresponding pixel column, and includes 2 data lines in each this group data line in order to the transmitted image data, and it is connected to strange pixel and dual pixel in this pixel column respectively; Backlight, it comprises redness, green and blue-light source; Scanner driver, it scans with the video picture of controlling this pixel by this m bar sweep trace; And data driver, it transmits this view data by this n group data line, with video picture in corresponding this pixel.

According to above-described purpose, the present invention also provides a kind of driving method of field sequence type LCD, this LCD comprises a plurality of pixels that are arranged in delegation's column matrix, and this driving method comprises: in each scan period, and at least two adjacent pixel columns of while scan control; In this scan period, the transmitted image data are given this at least two pixel column respectively; And in the cycle, provide a plurality of different colours light in regular turn to this pixel in each picture frame; The scanning of wherein above-mentioned at least two pixel columns is to control by same sweep trace, in above-mentioned scan period, is to give this at least two pixel column by multi-group data line difference transmitted image data.

Description of drawings

Fig. 1 shows known field sequence type LCD framework;

Fig. 2 shows known field sequence type liquid crystal display driving method;

The signal timing diagram of Fig. 3 display field sequential liquid crystal display;

Fig. 4 shows the field sequence type liquid crystal display driving method of one embodiment of the invention; And

Fig. 5 shows the process flow diagram of driving method of the present invention.

[main element label declaration]

10,60 liquid crystal panels

12 common electrode

14 common electrode substrates

16 liquid crystal layers

18 matrix base plates

20 back lighting devices

22 Polarizers

24 backlights

30,70 scanner drivers

40,80 data drivers

100 in each scan period, simultaneously at least two adjacent pixel columns of scan control

103 in this scan period, and the transmitted image data are given this at least two pixel column respectively

106 in the cycle, provide a plurality of different colours light to this pixel in each picture frame in regular turn

Embodiment

Some embodiments of the present invention are described in detail as follows.Yet except describing in detail, the present invention can also implement widely in other embodiments, and scope of the present invention do not limited, with after claim be as the criterion.

Fig. 4 shows the field sequence type liquid crystal display driving method that meets one embodiment of the invention.Comprisedliquid crystal panel 60,scanner driver 70 as shown in the figure, and data driver 80.Wherein liquid crystal panel has comprised a plurality of pixels, and all line of pixels align column matrix.Comprise the multi-strip scanning line in the liquid crystal panel, each bar sweep trace electrically connects at least two pixel columns; Be to be electrically connected at adjacent two pixel columns in the present embodiment.In addition, liquid crystal panel has also comprised the multi-group data line, and each group data line to corresponding pixel column, and includes many data lines in each group data line in order to the transmitted image data, and it is connected to adjacent pixels in this pixel column respectively.

Andscanner driver 70 is sent trigger pip, as shown by arrows from top to bottom in regular turn by above-mentioned multi-strip scanning line; In addition, does not limit to the direction of scanning, can from bottom to top send trigger pip in regular turn yet.In the present embodiment, each bar sweep trace is controlled two adjacent pixel columns simultaneously, so each trigger pip can be sent to all crystals tube grid in two pixel columns, makes that transistor is a conducting state.Simultaneously, 80 of data drivers offer all crystals pipe source electrode in two pixel columns by above-mentioned multi-group data line transmitted image data, are resent to the electric capacity that is coupled to transistor drain, and electric capacity can be charged according to view data.

Compared to traditional field sequence type LCD, the type of drive that present embodiment proposed is because each bar sweep trace can be controlled two adjacent pixel columns, so the ON time of each pixel column is the twice of known technology.For instance, suppose that the field sequence type LCD has 1280 row *, 800 row (WXGA specification) individual pixels.And back lighting device to be divided into be four blocks, each block provides 1280 row * the light source of 200 a row pixel.

The sweep frequency of field sequence type LCD is 180Hz, so the demonstration time of each picture frame is the 1/180=5.6 millisecond.In these 5.6 milliseconds, need 2 milliseconds of reaction time as liquid crystal arrangement, and 2 milliseconds of times of opening as backlight, therefore only be left 1.6 milliseconds in order to drive the pixels of 200 row.And each the bar sweep trace in the present embodiment can drive two pixel columns simultaneously, so the ON time of each pixel column is 1.6/ (200/2)=16 microsecond.In addition, the inventive method does not limit each sweep trace only can control two pixel columns, and those skilled in the art can use method of the present invention, makes each sweep trace control three pixel columns, four pixel columns, or more than five pixel columns or the like.

Fig. 5 is the process flow diagram that meets driving method of the present invention.At first, in each scan period, at least two adjacent pixel columns of scan control make that the transistor gate in two pixel columns receives trigger pip, with turn-on transistor (step 100) simultaneously; In this scan period, the transmitted image data are given at least two above-mentioned pixel columns respectively simultaneously, make that the electric capacity in two pixel columns can be done charging (step 103) according to view data; Last according to known field sequence type liquid crystal display displays principle, in the cycle, provide multiple different colours light in each picture frame (frame) in regular turn to this pixel (step 106).

The above is preferred embodiment of the present invention only, is not in order to limit the present invention; All other do not break away from the equivalence of being finished under the disclosed spirit and changes or modification, all should be included in the described claim scope.

Claims (9)

1. field sequence type LCD comprises:

Liquid crystal panel comprises:

A plurality of pixels, it is arranged in delegation's column matrix, and each above-mentioned pixel comprises thin film transistor (TFT);

Multi-strip scanning line, each this sweep trace are to electrically connect at least two pixel columns, and above-mentioned sweep trace is connected to the grid of this thin film transistor (TFT); And

The multi-group data line, above-mentioned data line is connected to the source electrode of this thin film transistor (TFT), this each group data line to corresponding pixel column, and includes many data lines in each this group data line in order to the transmitted image data, and it is connected to adjacent pixels in this pixel column respectively;

Backlight, it comprises a plurality of different colored light sources;

Scanner driver, it scans with the video picture of controlling this pixel by this multi-strip scanning line; And

Data driver, it transmits this view data by this multi-group data line, with video picture in corresponding this pixel.

2. field sequence type LCD according to claim 1, wherein above-mentioned backlight includes redness, green and blue-light source.

3. field sequence type LCD according to claim 1, wherein each this sweep trace is in order to control this adjacent at least two pixel column simultaneously.

4. field sequence type LCD comprises:

Liquid crystal panel comprises:

A plurality of pixels, it lines up the capable matrix of 2m row * n, and each wherein above-mentioned pixel comprises thin film transistor (TFT);

M bar sweep trace, each this sweep trace is in order to control two adjacent pixel columns simultaneously, and wherein above-mentioned sweep trace is connected to the grid of this thin film transistor (TFT); And

N organizes data line, wherein above-mentioned data line is connected to the source electrode of this thin film transistor (TFT), this each group data line to corresponding pixel column, and includes 2 data lines in each this group data line in order to the transmitted image data, and it is connected to strange pixel and dual pixel in this pixel column respectively;

Backlight, it comprises redness, green and blue-light source;

Scanner driver, it scans with the video picture of controlling this pixel by this m bar sweep trace; And

Data driver, it transmits this view data by this n group data line, with video picture in corresponding this pixel.

5. the driving method of a field sequence type LCD, this LCD comprises a plurality of pixels that are arranged in delegation's column matrix, and this driving method comprises:

In each scan period, at least two adjacent pixel columns of while scan control;

In this scan period, the transmitted image data are given this at least two pixel column respectively; And

In cycle, provide a plurality of different colours light in each picture frame in regular turn to this pixel;

The scanning of wherein above-mentioned at least two pixel columns is to control by same sweep trace, in above-mentioned scan period, is to give this at least two pixel column by multi-group data line difference transmitted image data.

6. according to the driving method of the described field sequence type LCD of claim 5, it is capable that wherein above-mentioned picture element matrix comprises 2m row * n.

7. according to the driving method of the described field sequence type LCD of claim 5, wherein above-mentioned LCD comprises m bar sweep trace, and each this sweep trace is in order to control two adjacent pixel columns simultaneously.

8. according to the driving method of the described field sequence type LCD of claim 5, wherein above-mentioned LCD comprises n group data line, this each group data line in order to the transmitted image data to corresponding pixel column, and include 2 data lines in each this group data line, it is connected to strange pixel and dual pixel in this pixel column respectively.

9. according to the driving method of the described field sequence type LCD of claim 5, wherein provide these a plurality of different colours light to the step of this pixel to comprise in regular turn:

Provide red light to this pixel;

Provide green light to this pixel; And

Provide blue ray to this pixel.

Images