技术领域technical field
本发明属于显示参数设定技术领域，具体涉及一种面板显示伽马校正的方法和装置。The invention belongs to the technical field of display parameter setting, in particular to a method and device for panel display gamma correction.
背景技术Background technique
显示面板出厂前需进行伽马(gamma)校正，即根据其实际显示亮度设定伽马参数(伽马向量在各绑点灰阶下的伽马值)，以使校正后的显示亮度符合预设的标准伽马曲线(即各绑点灰阶下的显示亮度为标准伽马曲线在相应绑点灰阶下的亮度)。Gamma correction is required before the display panel leaves the factory, that is, the gamma parameter (the gamma value of the gamma vector at each binding point gray scale) is set according to its actual display brightness, so that the corrected display brightness meets the preset value. The standard gamma curve is set (that is, the display brightness under the gray scale of each binding point is the brightness of the standard gamma curve under the corresponding gray scale of the binding point).
采用屏下传感器，例如屏下摄像头(FDC，Full Display with Camera)技术的显示装置中，摄像头(传感器)设于显示面板背侧(背离出光面侧)，通过显示面板的透过区(或称FDC区)采集图像，而透过区是显示区的一部分。为使透过区既透光又能显示，其像素设计需与除透过区外的主显示区(或称常规区，Normal区)不同，如透过区的像素密度较低，或透过区的每个驱动电路驱动多个像素等。In a display device using an under-screen sensor, such as an under-screen camera (FDC, Full Display with Camera) technology, the camera (sensor) is located on the back side of the display panel (the side away from the light-emitting surface), and passes through the transmission area of the display panel (or called FDC area) captures images, while the transmission area is part of the display area. In order to make the transmission area both transparent and displayable, its pixel design needs to be different from that of the main display area (or conventional area, Normal area) except for the transmission area. For example, the pixel density of the transmission area is low, or the transmission area Each drive circuit of the area drives a plurality of pixels and the like.
因像素设计不同，故透过区和主显示区在相同显示参数下的显示亮度不同，为保证两区的显示效果都符合标准伽马曲线，需分别对两个区进行伽马校正，导致校正用的Tact Time(节拍时间)长，生产效率低。Due to the different pixel designs, the display brightness of the transmission area and the main display area are different under the same display parameters. In order to ensure that the display effects of the two areas conform to the standard gamma curve, it is necessary to perform gamma correction on the two areas separately, resulting in the correction The Tact Time (tact time) used is long and the production efficiency is low.
发明内容Contents of the invention
本发明至少部分解决现有的面板显示伽马校正的方法耗时长、效率低的问题，提供一面板显示伽马校正的方法和装置。The present invention at least partly solves the problems of long time consumption and low efficiency of the existing panel display gamma correction method, and provides a panel display gamma correction method and device.
第一方面，本发明实施例提供一种面板显示伽马校正的方法，所述显示面板的显示区包括用于设置屏下传感器的透过区和除透过区外的主显示区，所述透过区中的像素电连接第一参考电压端，所述主显示区中的像素电连接第二参考电压端；所述方法包括：In the first aspect, an embodiment of the present invention provides a method for panel display gamma correction, wherein the display area of the display panel includes a transmission area for setting an under-screen sensor and a main display area except for the transmission area. The pixels in the transmission area are electrically connected to the first reference voltage terminal, and the pixels in the main display area are electrically connected to the second reference voltage terminal; the method includes:
根据所述透过区的显示亮度与主显示区的显示亮度的差值，确定提供给所述第一参考电压端的电压为第一校正参考电压；According to the difference between the display brightness of the transmission area and the display brightness of the main display area, determine the voltage provided to the first reference voltage terminal as the first calibration reference voltage;
根据所述主显示区的显示亮度分布与预设的标准伽马曲线，确定所述主显示区的伽马参数为主显示区校正伽马参数；determining the gamma parameter of the main display area and correcting the gamma parameter of the main display area according to the display brightness distribution of the main display area and the preset standard gamma curve;
根据所述主显示区校正伽马参数对透过区的初始伽马参数进行校正得到透过区校正伽马参数，确定所述透过区的伽马参数为透过区校正伽马参数。Correcting the initial gamma parameter of the transmission area according to the correction gamma parameter of the main display area to obtain the correction gamma parameter of the transmission area, and determining the gamma parameter of the transmission area as the correction gamma parameter of the transmission area.
可选的，所述根据所述透过区的显示亮度与主显示区的显示亮度的差值，确定提供给所述第一参考电压端的电压为第一校正参考电压包括：Optionally, the determining the voltage provided to the first reference voltage terminal as the first correction reference voltage according to the difference between the display brightness of the transmission area and the display brightness of the main display area includes:
根据预先获取的标准差值，确定提供给所述第一参考电压端的电压为第一校正参考电压；determining the voltage provided to the first reference voltage terminal as the first calibration reference voltage according to the pre-acquired standard deviation value;
其中，所述标准差值为在向第一参考电压端提供第一初始参考电压，向第二参考电压端提供第二初始参考电压，且透过区和主显示区均显示标准灰阶时，所述透过区的显示亮度与主显示区的显示亮度的差值。Wherein, the standard deviation value is when the first initial reference voltage is provided to the first reference voltage terminal, the second initial reference voltage is provided to the second reference voltage terminal, and both the transparent area and the main display area display standard gray scales, The difference between the display brightness of the transmission area and the display brightness of the main display area.
可选的，所述根据所述透过区的显示亮度与主显示区的显示亮度的差值，确定提供给所述第一参考电压端的电压为第一校正参考电压包括：Optionally, the determining the voltage provided to the first reference voltage terminal as the first correction reference voltage according to the difference between the display brightness of the transmission area and the display brightness of the main display area includes:
向所述第一参考电压端提供第一初始参考电压，向所述第二参考电压端提供第二初始参考电压，使所述透过区和主显示区均显示标准灰阶，测得所述透过区的显示亮度和主显示区的显示亮度，确定所述透过区的显示亮度与主显示区的显示亮度的标准差值；providing a first initial reference voltage to the first reference voltage terminal, providing a second initial reference voltage to the second reference voltage terminal, so that both the transmission area and the main display area display a standard gray scale, and the measured The display brightness of the transmission area and the display brightness of the main display area determine the standard deviation value of the display brightness of the transmission area and the display brightness of the main display area;
根据所述标准差值，确定提供给所述第一参考电压端的电压为第一校正参考电压。According to the standard deviation value, it is determined that the voltage provided to the first reference voltage terminal is the first calibration reference voltage.
可选的，所述标准灰阶为在向第二参考电压端提供第二初始参考电压时，使所述主显示区的显示亮度与预设的标准亮度最接近的灰阶。Optionally, the standard gray scale is the gray scale that makes the display brightness of the main display area closest to a preset standard brightness when the second initial reference voltage is supplied to the second reference voltage terminal.
可选的，所述根据所述主显示区的显示亮度分布与预设的标准伽马曲线，确定所述主显示区的伽马参数为主显示区校正伽马参数包括：Optionally, the determining the gamma parameter of the main display area and correcting the gamma parameter of the main display area according to the display brightness distribution of the main display area and the preset standard gamma curve include:
使所述主显示区显示预设的绑点灰阶，并检测所述主显示区的检测位置的绑点灰阶亮度；making the main display area display a preset gray scale of the binding point, and detecting the gray scale brightness of the binding point at the detection position of the main display area;
根据所述绑点灰阶亮度与标准伽马曲线在相应绑点灰阶的亮度间的差值，确定所述主显示区在该绑点灰阶下的伽马值。Determine the gamma value of the main display area at the gray scale of the binding point according to the difference between the gray scale brightness of the binding point and the brightness of the standard gamma curve at the gray scale of the binding point.
可选的，所述检测位置位于显示区的几何中心与透过区之间。Optionally, the detection position is located between the geometric center of the display area and the transmission area.
可选的，所述显示区具有相互垂直的高度方向和宽度方向；Optionally, the display area has a height direction and a width direction perpendicular to each other;
沿所述高度方向，所述透过区位于显示区的中心线的第一侧；Along the height direction, the transmission area is located on the first side of the center line of the display area;
沿所述高度方向，所述检测位置位于显示区的中心线的第一侧，且与所述中心线间的距离等于显示区沿高度方向的最大尺寸的四分之一；Along the height direction, the detection position is located on the first side of the center line of the display area, and the distance from the center line is equal to a quarter of the maximum dimension of the display area along the height direction;
沿所述宽度方向，所述检测位置位于显示区的中心线上。Along the width direction, the detection position is located on the center line of the display area.
可选的，所述根据所述主显示区校正伽马参数对透过区的初始伽马参数进行校正得到透过区校正伽马参数，确定所述透过区的伽马参数为透过区校正伽马参数包括：Optionally, the initial gamma parameter of the transmission area is corrected according to the correction gamma parameter of the main display area to obtain the correction gamma parameter of the transmission area, and the gamma parameter of the transmission area is determined as the transmission area Correction gamma parameters include:
根据所述主显示区校正伽马参数，通过二次非线性拟合对所述透过区的初始伽马参数进行校正得到透过区校正伽马参数，确定所述透过区的伽马参数为透过区校正伽马参数。Correct the gamma parameter according to the main display area, correct the initial gamma parameter of the transmission area by quadratic nonlinear fitting to obtain the correction gamma parameter of the transmission area, and determine the gamma parameter of the transmission area Corrects gamma parameters for transparent areas.
可选的，所述透过区校正伽马参数通过以下公式计算得到：Optionally, the correction gamma parameter of the transmission area is calculated by the following formula:
Y＝a(X+b)；Y=a(X+b);
其中，所述Y为表示透过区校正伽马参数的伽马向量，所述X为表示主显示区校正伽马参数的伽马向量，a、b分别为预设的系数。Wherein, the Y is a gamma vector representing the gamma parameter correction of the transmission area, the X is a gamma vector representing the gamma parameter correction of the main display area, and a and b are preset coefficients respectively.
第二方面，本发明实施例提供一种面板显示伽马校正的装置，所述显示面板的显示区包括用于设置屏下传感器的透过区和除透过区外的主显示区，所述透过区中的像素电连接第一参考电压端，所述主显示区中的像素电连接第二参考电压端；所述装置包括：In the second aspect, an embodiment of the present invention provides a panel display gamma correction device, the display area of the display panel includes a transmission area for setting an under-screen sensor and a main display area except for the transmission area. The pixels in the transmission area are electrically connected to the first reference voltage terminal, and the pixels in the main display area are electrically connected to the second reference voltage terminal; the device includes:
控制模块，用于执行以下步骤：根据所述透过区的显示亮度与主显示区的显示亮度的差值，确定提供给所述第一参考电压端的电压为第一校正参考电压；根据所述主显示区的显示亮度分布与预设的标准伽马曲线，确定所述主显示区的伽马参数为主显示区校正伽马参数；根据所述主显示区校正伽马参数对透过区的初始伽马参数进行校正得到透过区校正伽马参数，确定所述透过区的伽马参数为透过区校正伽马参数；The control module is used to perform the following steps: according to the difference between the display brightness of the transmission area and the display brightness of the main display area, determine that the voltage provided to the first reference voltage terminal is the first correction reference voltage; according to the The display brightness distribution of the main display area and the preset standard gamma curve determine the gamma parameters of the main display area to correct the gamma parameters of the main display area; The initial gamma parameter is corrected to obtain the gamma parameter for correction in the transmission area, and the gamma parameter for the transmission area is determined as the correction gamma parameter for the transmission area;
驱动模块，用于驱动所述显示面板进行显示；a driving module, configured to drive the display panel for display;
检测模块，用于检测所述显示面板的显示亮度。The detection module is used to detect the display brightness of the display panel.
附图说明Description of drawings
图1为本发明实施例的一种显示面板的显示区结构示意图；FIG. 1 is a schematic structural diagram of a display area of a display panel according to an embodiment of the present invention;
图2为本发明实施例的一种显示面板的像素的驱动电路的电路结构示意图；2 is a schematic circuit structure diagram of a pixel driving circuit of a display panel according to an embodiment of the present invention;
图3为本发明实施例的一种面板显示伽马校正的方法的流程图；FIG. 3 is a flowchart of a method for panel display gamma correction according to an embodiment of the present invention;
图4为本发明实施例的一种面板显示伽马校正的方法中，调整提供给第一参考电压端的电压前透过区和主显示区的伽马曲线；Fig. 4 is a panel display gamma correction method according to an embodiment of the present invention, adjusting the gamma curves of the front transmission area and the main display area of the voltage supplied to the first reference voltage terminal;
图5为本发明实施例的一种面板显示伽马校正的方法中，调整提供给第一参考电压端的电压后透过区和主显示区的伽马曲线；FIG. 5 is a gamma curve of the transmission area and the main display area after adjusting the voltage supplied to the first reference voltage terminal in a method of panel display gamma correction according to an embodiment of the present invention;
图6为本发明实施例的另一种面板显示伽马校正的方法的流程图；FIG. 6 is a flowchart of another method for panel display gamma correction according to an embodiment of the present invention;
图7为本发明实施例的一种面板显示伽马校正的装置的组成框图。FIG. 7 is a block diagram of a device for displaying gamma correction on a panel according to an embodiment of the present invention.
其中，附图标记为：11、透过区；12、主显示区；3、检测位置。Wherein, the reference signs are: 11, the transmission area; 12, the main display area; 3, the detection position.
具体实施方式Detailed ways
为使本领域技术人员更好地理解本发明的技术方案，下面结合附图和具体实施方式对本发明作进一步详细描述。In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
可以理解的是，此处描述的具体实施例和附图仅仅用于解释本发明，而非对本发明的限定。It should be understood that the specific embodiments and drawings described here are only for explaining the present invention, rather than limiting the present invention.
可以理解的是，在不冲突的情况下，本发明的各实施例及实施例中的各特征可相互组合。It can be understood that, in the case of no conflict, various embodiments of the present invention and various features in the embodiments can be combined with each other.
可以理解的是，为便于描述，本发明的附图中仅示出了与本发明实施例相关的部分，而与本发明实施例无关的部分未在附图中示出。It can be understood that, for the convenience of description, only the parts related to the embodiments of the present invention are shown in the drawings of the present invention, and the parts irrelevant to the embodiments of the present invention are not shown in the drawings.
可以理解的是，在不冲突的情况下，本发明实施例的流程图和框图中所标注的功能、步骤可按照不同于附图中所标注的顺序发生。It can be understood that, in the case of no conflict, the functions and steps marked in the flowcharts and block diagrams of the embodiments of the present invention may occur in a sequence different from that marked in the drawings.
可以理解的是，本发明实施例的流程图和框图中，示出了按照本发明各实施例的系统、装置、设备、方法的可能实现的体系架构、功能和操作。其中，流程图或框图中的每个方框可代表一个单元、模块、程序段、代码，其包含用于实现规定的功能的可执行指令。而且，框图和流程图中的每个方框或方框的组合，可用实现规定的功能的基于硬件的系统实现，也可用硬件与计算机指令的组合来实现。It can be understood that the flowcharts and block diagrams of the embodiments of the present invention show the possible implementation architecture, functions and operations of the systems, devices, devices, and methods according to the various embodiments of the present invention. Wherein, each block in the flowchart or block diagram may represent a unit, module, program segment, or code, which includes executable instructions for realizing specified functions. Furthermore, each block or combination of blocks in the block diagrams and flowcharts can be implemented by a hardware-based system which performs the specified function, or by a combination of hardware and computer instructions.
可以理解的是，本发明的实施例中所涉及的每个单元、模块可仅对应一个实体结构，也可由多个实体结构组成，或者，多个单元、模块也可集成为一个实体结构。It can be understood that each unit and module involved in the embodiments of the present invention may only correspond to one physical structure, or may be composed of multiple physical structures, or multiple units and modules may also be integrated into one physical structure.
可以理解的是，本发明实施例中所涉及的单元、模块可通过软件的方式实现，也可通过硬件的方式来实现，例如单元、模块可位于处理器中。It can be understood that the units and modules involved in the embodiments of the present invention may be implemented by means of software or hardware, for example, the units and modules may be located in a processor.
第一方面，本发明实施例提供一种面板显示伽马校正的方法。In a first aspect, an embodiment of the present invention provides a method for gamma correction of a panel display.
本发明实施例用于对显示面板进行伽马(gamma)校正，即，用于确定显示面板的伽马参数。The embodiment of the present invention is used to correct the gamma of the display panel, that is, to determine the gamma parameter of the display panel.
参照图1，本发明实施例适用的显示面板设置在采用屏下传感器，例如屏下摄像头(FDC，Full Display with Camera)技术的显示装置中。即，显示面板具有用于进行显示的显示区，显示区包括用于设置屏下传感器的“透过区11(或称FDC区)”，而显示区中除透过区11外的其它区域为“主显示区12(或称常规区，Normal区)”；其中，透过区11既可透光也能进行显示，而主显示区12能显示但不透光。由此，在显示装置中，摄像头(传感器)可设于显示面板背侧(背离出光面侧)对应透过区11的位置，通过透过区11采集外界的图像。Referring to FIG. 1 , a display panel applicable to an embodiment of the present invention is set in a display device using an under-display sensor, such as an under-display camera (FDC, Full Display with Camera) technology. That is, the display panel has a display area for displaying, and the display area includes a "transmission area 11 (or FDC area)" for setting the under-screen sensor, and other areas in the display area except the transmission area 11 are "Main display area 12 (or normal area, Normal area)"; wherein, the transmission area 11 can both transmit light and display, while the main display area 12 can display but not transmit light. Therefore, in the display device, the camera (sensor) can be installed at the position corresponding to the transmission area 11 on the back side of the display panel (the side away from the light-emitting surface), and collect images of the outside world through the transmission area 11 .
应当理解，由于摄像头设于透过区11中，故显示面板的整个显示侧可完全是显示区，以实现全屏显示。It should be understood that since the camera is located in the transmission area 11, the entire display side of the display panel can be completely a display area to achieve full-screen display.
示例性的，以上显示装置可为手机、平板电脑、台式电脑、笔记本电脑、电视机等任何具有显示功能的产品，在此不再详细描述。Exemplarily, the display device above can be any product with a display function such as a mobile phone, a tablet computer, a desktop computer, a notebook computer, and a television, and will not be described in detail here.
本发明实施例的显示面板的显示区中，设有多个用于进行显示的像素(或称子像素)，而每个像素可在对应的驱动电路的驱动下进行显示。而像素(驱动电路)需要在多个驱动信号的驱动下工作，其中一个驱动信号为“参考电压(Vref)”，或称“初始化电压(Vinit)”，该驱动信号通过参考电压端VREF(或称初始化电压端)提供。即，每个像素(驱动电路)中都有一个位置电连接参考电压端VREF。In the display area of the display panel in the embodiment of the present invention, a plurality of pixels (or called sub-pixels) for displaying are provided, and each pixel can display under the driving of a corresponding driving circuit. The pixel (drive circuit) needs to work under the drive of multiple drive signals, one of which is "reference voltage (Vref)", or "initialization voltage (Vinit)", which is passed through the reference voltage terminal VREF (or Called the initialization voltage terminal) to provide. That is, each pixel (driver circuit) has a position electrically connected to the reference voltage terminal VREF.
例如，参照图2所示的7T1C结构的驱动电路包括七个晶体管(第一晶体管T1、第二晶体管T2、第三晶体管T3、第四晶体管T4、第五晶体管T5、第六晶体管T6、第七晶体管T7)和一个存储电容CST，以及一个作为发光器件的有机发光二极管OLED，即显示面板可为有机发光二极管(OLED)显示面板。For example, referring to the driving circuit of the 7T1C structure shown in FIG. Transistor T7) and a storage capacitor CST, and an organic light emitting diode OLED as a light emitting device, that is, the display panel may be an organic light emitting diode (OLED) display panel.
其中，各晶体管的不同位置分别电连接至不同的信号源，如电连接至控制信号线EM、栅线GATE、数据线GATE、重置线RST、重置电压端VINT、第一电压端VDD、第二电压端VSS等；其中，第五晶体管T5的第一极电连接的就是参考电压端VREF。Wherein, different positions of each transistor are electrically connected to different signal sources, such as electrically connected to the control signal line EM, the gate line GATE, the data line GATE, the reset line RST, the reset voltage terminal VINT, the first voltage terminal VDD, The second voltage terminal VSS and so on; wherein, the first electrode of the fifth transistor T5 is electrically connected to the reference voltage terminal VREF.
在以上7T1C结构的驱动电路中，有机发光二极管OLED的发光亮度(即像素的显示亮度)是由其中驱动晶体管(即第三晶体管T3)的栅源电压Vgs决定的，而Vgs可通过以下公式计算：In the driving circuit of the above 7T1C structure, the luminance of the organic light emitting diode OLED (that is, the display brightness of the pixel) is determined by the gate-source voltage Vgs of the driving transistor (that is, the third transistor T3), and Vgs can be calculated by the following formula :
Vgs＝Vdata-|Vth|-Vref；Vgs=Vdata-|Vth |-Vref;
其中，Vdata为数据线GATE提供的数据电压，Vth为驱动晶体管的阈值电压，Vref即为参考电压端VREF提供的参考电压。Wherein, Vdata is the data voltage provided by the data line GATE, Vth is the threshold voltage of the driving transistor, and Vref is the reference voltage provided by the reference voltage terminal VREF.
由此可见，像素的显示亮度和与其电连接的参考电压端提供的参考电压相关，即，在其它参数不变的情况下，改变参考电压可改变像素的显示亮度。It can be seen that the display brightness of a pixel is related to the reference voltage provided by the reference voltage terminal electrically connected to it, that is, changing the reference voltage can change the display brightness of the pixel when other parameters remain unchanged.
应当理解，本发明实施例的显示面板不一定是有机发光二极管(OLED)显示面板，且其中的驱动电路也不限于以上7T1C的具体形式，其中驱动晶体管的栅源电压(Vgs)也不一定符合以上的具体公式。It should be understood that the display panel in the embodiment of the present invention is not necessarily an organic light emitting diode (OLED) display panel, and the driving circuit therein is not limited to the specific form of the above 7T1C, and the gate-source voltage (Vgs) of the driving transistor does not necessarily meet The specific formula above.
即，不论显示面板的类型如何，以及驱动电路的具体形式如何，只要其像素(驱动电路)电连接用于提供参考电压(Vref)的参考电压端VREF，且参考电压能影响像素的显示亮度，就是可行的。That is, regardless of the type of the display panel and the specific form of the driving circuit, as long as its pixel (driving circuit) is electrically connected to the reference voltage terminal VREF for providing a reference voltage (Vref), and the reference voltage can affect the display brightness of the pixel, It just works.
本发明实施例的显示面板中，透过区11和主显示区12均要进行显示，故其中均设有像素。显然，像素要进行显示则通常不透光，而透过区11要在显示的同时透光，故其需要具有较高的透过率，因此，透过区11中的像素设计与主显示区12的像素设计是不同的。In the display panel of the embodiment of the present invention, both the transmission area 11 and the main display area 12 are required to display, so pixels are provided therein. Apparently, the pixels are generally opaque to display, and the transmission area 11 needs to transmit light while displaying, so it needs to have a higher transmittance. Therefore, the pixel design in the transmission area 11 is consistent with the main display area. 12's pixel design is different.
例如，可以是透过区11中的像素密度比主显示区12的像素密度低，即，同样面积内透过区11的像素个数较少，从而透过区11的透过率高。For example, the pixel density in the transmissive region 11 may be lower than that in the main display region 12 , that is, the number of pixels in the transmissive region 11 is less in the same area, so that the transmittance of the transmissive region 11 is higher.
再如，也可以是透过区11中每个像素的面积较小，从而透过区11的透过率高。For another example, the area of each pixel in the transmission area 11 may be small, so that the transmittance of the transmission area 11 is high.
再如，也可以是透过区11中每个驱动电路驱动多个像素(主显示区12中的每个驱动电路驱动一个像素)，从而透过区11中驱动电路(如晶体管、走线等)所占的面积较小，透过率高。For another example, it is also possible to drive a plurality of pixels through each driving circuit in the area 11 (each driving circuit in the main display area 12 drives one pixel), so that through the driving circuits in the area 11 (such as transistors, wires, etc. ) occupies a small area and has a high transmittance.
本发明实施例适用的显示面板中，显示区包括用于设置屏下传感器(如摄像头)的透过区11和除透过区11外的主显示区12，透过区11中的像素电连接第一参考电压端，主显示区12中的像素电连接第二参考电压端。In the display panel to which the embodiment of the present invention is applicable, the display area includes a transmission area 11 for setting an under-screen sensor (such as a camera) and a main display area 12 except the transmission area 11, and the pixels in the transmission area 11 are electrically connected to The first reference voltage terminal and the pixels in the main display area 12 are electrically connected to the second reference voltage terminal.
本发明实施例中，透过区11和主显示区12的像素(驱动电路)是分别电连接不同的参考电压端(第一参考电压端、第二参考电压端)的，例如，透过区11的每个像素均通过第一参考电压线电连接至第一参考电压端；而主显示区12的每个像素均通过第二参考电压线电连接至第二参考电压端，且第一参考电压线和第二参考电压线相互绝缘。In the embodiment of the present invention, the pixels (driver circuits) in the transmission area 11 and the main display area 12 are respectively electrically connected to different reference voltage terminals (first reference voltage terminal, second reference voltage terminal), for example, the transmission area Each pixel of 11 is electrically connected to the first reference voltage end through the first reference voltage line; and each pixel of the main display area 12 is electrically connected to the second reference voltage end through the second reference voltage line, and the first reference The voltage line and the second reference voltage line are insulated from each other.
其中，第一参考电压端、第二参考电压端显然可分别独立的提供不同的参考电压。因此，本发明实施例中，驱动透过区11的像素和主显示区12的像素的获取的参考电压可以是不同的。Wherein, obviously, the first reference voltage terminal and the second reference voltage terminal can respectively and independently provide different reference voltages. Therefore, in the embodiment of the present invention, the obtained reference voltages for driving the pixels in the transmission area 11 and the pixels in the main display area 12 may be different.
在一些相关技术中，透过区和主显示区的像素(驱动电路)均电连接同一个参考电压端，例如是每个像素均通过参考电压线最终电连接至一个参考电压端。由此，在相关技术中，透过区和主显示区的像素获取的参考电压必然是相同的，不可能不同。In some related technologies, the pixels (driving circuits) in the transmission area and the main display area are electrically connected to the same reference voltage terminal, for example, each pixel is finally electrically connected to a reference voltage terminal through a reference voltage line. Therefore, in the related art, the reference voltages obtained by the pixels in the transmission area and the main display area must be the same and cannot be different.
应当理解，本发明实施例中的参考电压端个数是以其是否能提供不同的电压确定的，即，若物理上分开的多个“端口(接头)”，若是必然提供相同的电压，则它们是一个参考电压端。It should be understood that the number of reference voltage terminals in the embodiments of the present invention is determined by whether they can provide different voltages, that is, if multiple "ports (connectors)" that are physically separated must provide the same voltage, then They are a reference voltage terminal.
参照图3，本发明实施例的面板显示伽马校正的方法包括：Referring to FIG. 3, the method for panel display gamma correction according to the embodiment of the present invention includes:
S101、根据透过区11的显示亮度与主显示区12的显示亮度的差值，确定提供给第一参考电压端的电压为第一校正参考电压。S101. According to the difference between the display luminance of the transmission area 11 and the display luminance of the main display area 12, determine the voltage provided to the first reference voltage terminal as the first correction reference voltage.
如前，由于透过区11中的像素设计与主显示区12的像素设计不同，故在其它显示参数相同的情况下，两个区的显示亮度值(DBV)是不同的，从而导致两个区的亮度出现明显差别，影响显示效果，尤其是在显示纯色画面时更为明显。As before, since the pixel design in the transmission area 11 is different from the pixel design in the main display area 12, when other display parameters are the same, the display brightness values (DBV) of the two areas are different, resulting in two There is a significant difference in the brightness of the area, which affects the display effect, especially when displaying a solid color picture.
如前，参考电压能影响像素的显示亮度，且本发明实施例的显示面板中透过区11和主显示区12的像素电连接不同的参考电压端，能获得不同的参考电压；因此，可根据透过区11和主显示区12分别在各自原本的参考电压(第一初始参考电压、第二初始参考电压)下显示时的亮度差值，按照可减少显示亮度差异的方式，确定出新的提供给第一参考电压端的电压(第一校正参考电压)，也就是单独提供给透过区11的参考电压(Vref)。As before, the reference voltage can affect the display brightness of the pixels, and the pixels in the transmission area 11 and the main display area 12 of the display panel in the embodiment of the present invention are electrically connected to different reference voltage terminals, and different reference voltages can be obtained; therefore, it is possible According to the difference in luminance when the transmissive area 11 and the main display area 12 are displayed under their respective original reference voltages (the first initial reference voltage and the second initial reference voltage), a new method is determined in such a way that the difference in display luminance can be reduced. The voltage provided to the first reference voltage terminal (the first correction reference voltage), that is, the reference voltage (Vref) provided to the transparent region 11 alone.
由此，在该第一校正参考电压下，透过区11的显示亮度可接近主显示区12的显示亮度(主显示区12仍在第二初始参考电压下显示)。Therefore, under the first calibration reference voltage, the display brightness of the transmission region 11 can be close to the display brightness of the main display region 12 (the main display region 12 is still displaying under the second initial reference voltage).
例如，透过区11和主显示区12分别在第一初始参考电压、第二初始参考电压下的伽马曲线(即各灰阶下的显示亮度)可参照图4，其中两条伽马曲线差别很大；而在将第一初始参考电压调整为第一校正参考电压后，透过区11和主显示区12对应的伽马曲线可参照图5，其中两条伽马曲线间的差异大幅降低。For example, the gamma curves of the transmissive area 11 and the main display area 12 under the first initial reference voltage and the second initial reference voltage respectively (that is, the display brightness at each gray scale) can refer to FIG. 4, wherein two gamma curves The difference is very large; after adjusting the first initial reference voltage to the first correction reference voltage, the gamma curves corresponding to the transmission area 11 and the main display area 12 can refer to Figure 5, where the difference between the two gamma curves is large reduce.
因此，通过调整透过区11的参考电压，可大大降低透过区11和主显示区12显示亮度的差异，改善显示效果。Therefore, by adjusting the reference voltage of the transmissive area 11, the difference in display brightness between the transmissive area 11 and the main display area 12 can be greatly reduced and the display effect can be improved.
其中，以上第一初始参考电压、第二初始参考电压是指在进行调整前，透过区11、主显示区12分别设定的“原始”的参考电压，该第一初始参考电压和第二初始参考电压的值可以是相同的，也可以是不同的。Wherein, the first initial reference voltage and the second initial reference voltage above refer to the "original" reference voltages respectively set through the transmission area 11 and the main display area 12 before adjustment. The first initial reference voltage and the second initial reference voltage The values of the initial reference voltages can be the same or different.
S102、根据主显示区12的显示亮度分布与预设的标准伽马曲线，确定主显示区12的伽马参数为主显示区校正伽马参数。S102. According to the display brightness distribution of the main display area 12 and the preset standard gamma curve, determine the gamma parameter of the main display area 12 and correct the gamma parameter of the main display area.
根据主显示区12在各灰阶下显示亮度的分布情况，以及预设的标准伽马曲线，对主显示区12进行伽马校正(可为包括亮度检测的常规伽马校正)，得到主显示区12的伽马参数(主显示区校正伽马参数，例如是各绑点灰阶下的伽马值)。According to the distribution of brightness displayed in the main display area 12 at each gray scale and the preset standard gamma curve, perform gamma correction on the main display area 12 (it may be a conventional gamma correction including brightness detection) to obtain the main display The gamma parameter of area 12 (the main display area corrects the gamma parameter, for example, the gamma value under the gray scale of each binding point).
S103、根据主显示区校正伽马参数对透过区11的初始伽马参数进行校正得到透过区校正伽马参数，确定透过区11的伽马参数为透过区校正伽马参数。S103. Correct the initial gamma parameter of the transmission area 11 according to the correction gamma parameter of the main display area to obtain the correction gamma parameter of the transmission area, and determine the gamma parameter of the transmission area 11 as the correction gamma parameter of the transmission area.
在得到主显示区12的主显示区校正伽马参数后，还可根据其对透过区11的初始伽马参数进行调整，得到调整后的透过区11的伽马参数(透过区校正伽马参数)。After obtaining the main display area correction gamma parameter of the main display area 12, the initial gamma parameter of the transmission area 11 can also be adjusted according to it to obtain the adjusted gamma parameter of the transmission area 11 (transmission area correction gamma parameter).
由于透过区11的参考电压只有“一个值”，故参照图5，调整透过区11的参考电压能使两区的伽马曲线接近，但可能无法使透过区11的伽马曲线与标准伽马曲线的完全拟合。因此，可在计算得到主显示区校正伽马参数后，再根据其对透过区11的伽马参数进行“微调”，以进一步改善透过区11的显示效果。Since the reference voltage of the transmission area 11 has only "one value", referring to Fig. 5, adjusting the reference voltage of the transmission area 11 can make the gamma curves of the two areas close, but it may not be possible to make the gamma curve of the transmission area 11 and A full fit of the standard gamma curve. Therefore, after the correction gamma parameter of the main display area is calculated, the gamma parameter of the transmission area 11 can be “fine-tuned” according to it, so as to further improve the display effect of the transmission area 11 .
应当理解，本步骤是根据主显示区校正伽马参数、透过区11的初始伽马参数进行的“计算”过程，而没有实际测量透过区11的显示亮度，故相对于常规伽马校正过程，其耗时很短。It should be understood that this step is a "calculation" process based on correcting the gamma parameters of the main display area and the initial gamma parameters of the transmission area 11, without actually measuring the display brightness of the transmission area 11, so compared with conventional gamma correction process, which takes a short time.
应当理解，在得到第一校正参考电压、主显示区校正伽马参数、透过区校正伽马参数后，还可将它们写入(烧录)显示面板的驱动芯片中，以使显示面板后续按照相应的显示参数工作。It should be understood that after obtaining the first corrected reference voltage, the corrected gamma parameters of the main display area, and the corrected gamma parameters of the transmission area, they can also be written (burned) into the drive chip of the display panel, so that the subsequent Work according to the corresponding display parameters.
应当理解，以上S101步骤和S102步骤的编号和描述顺序，并不代表二者必然的执行顺序，即，本发明实施例中可以是先确定第一校正参考电压，也可以是先确定透过区校正伽马参数，或者是同时确定两个参数。It should be understood that the numbering and description order of the above steps S101 and S102 do not represent the necessary execution order of the two, that is, in the embodiment of the present invention, the first calibration reference voltage may be determined first, or the transmission region may be determined first Correct the gamma parameter, or determine both parameters at the same time.
本发明实施例中，对显示面板的主显示区12进行了伽马校正，保证主显示区12的显示亮度符合标准伽马曲线；同时，通过对透过区11进行参考电压调整和伽马参数调整，可保证其显示亮度也基本符合标准伽马曲线(透过区11面积很小，故即使稍有差距对整体显示效果的影响也很小)，从而使显示面板两个区的显示亮度接近，充分改善显示效果。In the embodiment of the present invention, gamma correction is performed on the main display area 12 of the display panel to ensure that the display brightness of the main display area 12 conforms to the standard gamma curve; Adjustment can ensure that the display brightness basically conforms to the standard gamma curve (the area of the transmission area 11 is very small, so even a slight difference has little influence on the overall display effect), so that the display brightness of the two areas of the display panel is close to , to fully improve the display effect.
另一方面，本发明实施例中只进行了一次需要进行亮度检测的伽马校正，而对透过区11的调整是通过简单的计算和参数设置完成的，几乎不耗时间，故其校正用的TactTime(节拍时间)短，生产效率高。On the other hand, in the embodiment of the present invention, the gamma correction that requires brightness detection is only performed once, and the adjustment to the transmission area 11 is completed through simple calculation and parameter setting, which takes almost no time, so the correction is used The TactTime (takt time) is short and the production efficiency is high.
可选的，参照图6，根据透过区11的显示亮度与主显示区12的显示亮度的差值，确定提供给第一参考电压端的电压为第一校正参考电压(S101)包括：Optionally, referring to FIG. 6, according to the difference between the display brightness of the transmission area 11 and the display brightness of the main display area 12, determining that the voltage provided to the first reference voltage terminal is the first correction reference voltage (S101) includes:
S1011、向第一参考电压端提供第一初始参考电压，向第二参考电压端提供第二初始参考电压，使透过区11和主显示区12均显示标准灰阶，测得透过区11的显示亮度和主显示区12的显示亮度，确定透过区11的显示亮度与主显示区12的显示亮度的标准差值。S1011. Provide the first initial reference voltage to the first reference voltage terminal, and provide the second initial reference voltage to the second reference voltage terminal, so that both the transmission area 11 and the main display area 12 display standard gray scales, and the transmission area 11 is measured. The display brightness of the transmission area 11 and the display brightness of the main display area 12 determine the standard deviation value of the display brightness of the transmission area 11 and the display brightness of the main display area 12.
S1012、根据标准差值，确定提供给第一参考电压端的电压为第一校正参考电压。S1012. According to the standard deviation value, determine that the voltage provided to the first reference voltage terminal is the first correction reference voltage.
第一校正参考电压用于使透过区11与主显示区12的显示亮度接近，故其应当根据透过区11和主显示区12“原本”显示亮度的差距确定。The first calibration reference voltage is used to make the display brightness of the transmission area 11 and the main display area 12 close, so it should be determined according to the "original" display brightness difference between the transmission area 11 and the main display area 12 .
为此，作为本发明实施例的一种方式，可在初始情况下(即透过区11采用第一初始参考电压而主显示区12采用第二初始参考电压的情况下)，使透过区11和主显示区12均显示一个确定的标准灰阶，并测出两区在该标灰阶下实际的显示亮度的差距(标准差值)，以根据该标准差值调整透过区11的参考电压，得到合理的第一校正参考电压。For this reason, as a method of the embodiment of the present invention, in the initial situation (that is, when the transmission area 11 adopts the first initial reference voltage and the main display area 12 adopts the second initial reference voltage), the transmission area 11 and the main display area 12 both display a certain standard gray scale, and measure the difference (standard deviation value) between the actual display brightness of the two areas under the standard gray scale, so as to adjust the transmission area 11 according to the standard deviation value. reference voltage to obtain a reasonable first corrected reference voltage.
例如，可以是根据该标准差值，确定透过区11的参考电压的调整方向(增大或减小)和调整量；之后，对第一初始参考电压进行相应调整(当然两区仍都显示标准灰阶，且主显示区12仍采用第二初始参考电压)；之后，再次确定两区的亮度差值，并根据新的亮度差值再次调整透过区11的参考电压；如此循环，直至两区的亮度差值达到预设范围之内时，以当前透过区11的参考电压为第一初始参考电压。For example, the adjustment direction (increase or decrease) and adjustment amount of the reference voltage of the transmissive area 11 can be determined according to the standard deviation value; after that, the first initial reference voltage is adjusted accordingly (of course both areas still display standard gray scale, and the main display area 12 still adopts the second initial reference voltage); afterward, the brightness difference between the two areas is determined again, and the reference voltage of the transmissive area 11 is adjusted again according to the new brightness difference; and so on, until When the luminance difference between the two areas falls within the preset range, the current reference voltage of the transmissive area 11 is used as the first initial reference voltage.
再如，也可根据标准差值，按照预先确定的计算公式(如理论公式)，直接计算出准确的调整量，对透过区11的参考电压进行相应调整后得到第一校正参考电压。For another example, the accurate adjustment amount can be directly calculated according to the standard deviation value according to a predetermined calculation formula (such as a theoretical formula), and the first corrected reference voltage can be obtained after correspondingly adjusting the reference voltage of the transmission area 11 .
可选的，根据透过区11的显示亮度与主显示区12的显示亮度的差值，确定提供给第一参考电压端的电压为第一校正参考电压(S101)包括：Optionally, according to the difference between the display brightness of the transmission area 11 and the display brightness of the main display area 12, determining the voltage provided to the first reference voltage terminal as the first correction reference voltage (S101) includes:
S1013、根据预先获取的标准差值，确定提供给第一参考电压端的电压为第一校正参考电压。S1013. Determine, according to the pre-acquired standard deviation value, that the voltage provided to the first reference voltage terminal is the first correction reference voltage.
其中，标准差值为在向第一参考电压端提供第一初始参考电压，向第二参考电压端提供第二初始参考电压，且透过区11和主显示区12均显示标准灰阶时，透过区11的显示亮度与主显示区12的显示亮度的差值。Wherein, the standard deviation value is when the first initial reference voltage is provided to the first reference voltage terminal, the second initial reference voltage is provided to the second reference voltage terminal, and when both the transmission area 11 and the main display area 12 display standard gray scales, The difference between the display brightness of the transmission area 11 and the display brightness of the main display area 12 .
对同样型号的多个显示面板，参考电压对它们显示效果的影响是基本相同的，即它们在初始情况下(透过区11采用第一初始参考电压而主显示区12采用第二初始参考电压时)，透过区11和主显示区12间显示亮度的差距(标准差值)是基本差不多的，相应的，它们的透过区11所需的参考电压(第一校正参考电压)也是差不多的。For a plurality of display panels of the same model, the influence of the reference voltage on their display effect is basically the same, that is, they are in the initial situation (transmission area 11 adopts the first initial reference voltage and main display area 12 adopts the second initial reference voltage time), the difference (standard deviation value) of display brightness between the transmission area 11 and the main display area 12 is basically the same, and correspondingly, the reference voltage (first calibration reference voltage) required by their transmission area 11 is also almost the same of.
因此，作为本发明实施例的另一种方式，可以是对某型号的显示面板，预先获取其中第一个显示面板的标准差值(例如采用以上步骤S1011的方式)；相应的，该型号的其它显示面板的第一校正参考电压，都可根据该预先获取的标准差值确定。Therefore, as another method of the embodiment of the present invention, for a certain type of display panel, the standard deviation value of the first display panel may be obtained in advance (for example, by the method of step S1011 above); correspondingly, the The first calibration reference voltages of other display panels can be determined according to the pre-acquired standard deviation value.
例如，其它显示面板可直接采用第一个显示面板的第一校正参考电压(这样其它显示面板的第一校正参考电压仍然是根据“预先获取的标准差值”得出的)。For example, other display panels may directly adopt the first calibration reference voltage of the first display panel (so that the first calibration reference voltages of other display panels are still obtained according to the "pre-acquired standard deviation value").
由此可见，对某型号的显示面板，除其中第一个显示面板外，其它该型号的显示面板的第一校正参考电压都可根据已知的标准差值直接“设定”，而不用进行实际的显示亮度采集等操作，从而可进一步提高校正过程的效率。It can be seen that, for a display panel of a certain type, except for the first display panel, the first calibration reference voltages of other display panels of this type can be directly "set" according to the known standard deviation value without performing The actual display brightness acquisition and other operations can further improve the efficiency of the correction process.
可选的，标准灰阶为在向第二参考电压端提供第二初始参考电压时，使主显示区12的显示亮度与预设的标准亮度最接近的灰阶。Optionally, the standard gray scale is the gray scale that makes the display brightness of the main display area 12 closest to the preset standard brightness when the second initial reference voltage is supplied to the second reference voltage terminal.
作为本发明实施例的一种方式，以上“标准灰阶”是使主显示区12的显示亮度与预设的标准亮度最接近的灰阶。As a method of the embodiment of the present invention, the above "standard grayscale" is the grayscale that makes the display brightness of the main display area 12 the closest to the preset standard brightness.
其中，标准亮度是预先设定的，例如是客户规定的一个亮度值(Lmax)；相应的，可向主显示区12提供第二初始参考电压，并检测其在多个灰阶下的显示亮度值，选出其中与Lmax亮度值最接近的亮度值对应的灰阶，作为标准灰阶。Wherein, the standard brightness is preset, such as a brightness value (Lmax) specified by the customer; correspondingly, the second initial reference voltage can be provided to the main display area 12, and its display brightness in multiple gray scales can be detected value, and select the gray scale corresponding to the brightness value closest to the Lmax brightness value as the standard gray scale.
当然，标准灰阶的选取方式不限于此，例如其也可为最大灰阶，或者是中值灰阶等。Of course, the selection method of the standard gray scale is not limited thereto, for example, it may also be the maximum gray scale, or the median gray scale.
可选的，参照图6，根据主显示区12的显示亮度分布与预设的标准伽马曲线，确定主显示区12的伽马参数为主显示区校正伽马参数(S102)包括：Optionally, referring to FIG. 6, according to the display brightness distribution of the main display area 12 and the preset standard gamma curve, determining the gamma parameters of the main display area 12 and correcting the gamma parameters of the main display area (S102) include:
S1021、使主显示区12显示预设的绑点灰阶，并检测主显示区12的检测位置3的绑点灰阶亮度。S1021 . Make the main display area 12 display a preset gray scale of the binding point, and detect the brightness of the gray scale of the binding point at the detection position 3 of the main display area 12 .
S1022、根据绑点灰阶亮度与标准伽马曲线在相应绑点灰阶的亮度间的差值，确定主显示区12在该绑点灰阶下的伽马值。S1022. Determine the gamma value of the main display area 12 at the gray scale of the binding point according to the difference between the brightness of the gray scale of the binding point and the brightness of the standard gamma curve at the gray scale of the binding point.
每个显示面板通常有部分特定灰阶能进行伽马值的设置，而这样的灰阶称为绑点灰阶；任意两个相邻的绑点灰阶的伽马值设置可影响期间各灰阶的显示亮度。例如，对有256个灰阶的显示面板，可以是预先确定14个绑点灰阶。Each display panel usually has some specific gray levels that can be set for gamma values, and such gray levels are called binding point gray levels; the gamma value settings of any two adjacent binding point gray levels can affect each gray level during the period. level of display brightness. For example, for a display panel with 256 gray levels, 14 gray levels of binding points may be predetermined.
其中，标准伽马曲线是预先设定的显示面板应具有的显示亮度值曲线(DBV曲线)，即，标准伽马曲线规定了显示面板在每个灰阶下应有的亮度。Wherein, the standard gamma curve is a preset display brightness value curve (DBV curve) that the display panel should have, that is, the standard gamma curve specifies the brightness that the display panel should have at each gray scale.
作为本发明实施例的一种方式，在对主显示区12进行伽马校正时，可以是分别使主显示区12显示(在第二初始参考电压下)各绑点灰阶，而在显示每个绑点灰阶时，通过亮度计等实际采集主显示区12的显示亮度(绑点灰阶亮度)，并根据绑点灰阶亮度与标准伽马曲线在相应绑点灰阶规定的亮度间的差值，设定该绑点灰阶下的伽马值；而所有绑点灰阶下的伽马值的总和构成主显示区校正伽马参数。As a method of the embodiment of the present invention, when performing gamma correction on the main display area 12, the main display area 12 can be respectively made to display (under the second initial reference voltage) the gray scales of each binding point, and each When there are two binding point gray scales, the display brightness (the binding point gray scale brightness) of the main display area 12 is actually collected by a luminance meter, etc., and according to the binding point gray scale brightness and the standard gamma curve, it is between the brightness specified by the corresponding binding point gray scale. The difference is to set the gamma value under the gray scale of the binding point; and the sum of the gamma values under all the gray scales of the binding point constitutes the correction gamma parameter of the main display area.
可选的，检测位置3位于显示区的几何中心与透过区11之间。Optionally, the detection position 3 is located between the geometric center of the display area and the transmission area 11 .
可选的，显示区具有相互垂直的高度方向和宽度方向；沿高度方向，透过区11位于显示区的中心线的第一侧；沿高度方向，检测位置3位于显示区的中心线的第一侧，且与中心线间的距离等于显示区沿高度方向的最大尺寸的四分之一；沿宽度方向，检测位置3位于显示区的中心线上。Optionally, the display area has a height direction and a width direction perpendicular to each other; along the height direction, the transmission area 11 is located on the first side of the center line of the display area; along the height direction, the detection position 3 is located on the first side of the center line of the display area One side, and the distance from the center line is equal to a quarter of the maximum size of the display area along the height direction; along the width direction, the detection position 3 is located on the center line of the display area.
作为本发明实施例的一种方式，参照图1，采集主显示区12的显示亮度时，其检测位置3(如亮度计对准的位置)可以是位于显示区几何中心与透过区11之间的。进一步可以是：检测位置3在宽度方向上位于显示区的中线上，而在高度方向上与透过区11位于中线的同一侧，且与中线间的距离等于显示区高度(h)的四分之一(h/4)。As a method of the embodiment of the present invention, with reference to Fig. 1, when collecting the display brightness of the main display area 12, its detection position 3 (such as the position where the luminance meter is aligned) can be located between the geometric center of the display area and the transmission area 11. Between. It may further be that: the detection position 3 is located on the center line of the display area in the width direction, and is located on the same side of the center line as the transmission area 11 in the height direction, and the distance from the center line is equal to a quarter of the height (h) of the display area One (h/4).
显然，由于引线电压降等原因，故在相同显示参数下，主显示区12内不同位置的显示亮度实际仍有细微差别，而从保证主显示区12整体显示亮度最接近标准伽马曲线和提高均一性的角度考虑，应当以显示区几何中心作为检测位置。Obviously, due to the voltage drop of the lead wires, etc., under the same display parameters, the display brightness of different positions in the main display area 12 actually still has slight differences, and the overall display brightness of the main display area 12 is the closest to the standard gamma curve and improved. From the perspective of uniformity, the geometric center of the display area should be used as the detection position.
但是，本发明实施例中，透过区11的伽马参数是根据主显示区校正伽马参数设定的，故确定该主显示区校正伽马参数所依据的采样点越接近透过区11，则根据其设定的透过区11的伽马参数越符合的要求。However, in the embodiment of the present invention, the gamma parameter of the transmission area 11 is set according to the corrected gamma parameter of the main display area, so the closer the sampling point on which the corrected gamma parameter of the main display area is determined is closer to the transmission area 11 , the gamma parameter of the transmission area 11 set according to it is more in line with the requirements.
为此，本发明实施例不是像一些相关技术中以显示区的几何中心作为检测位置，而是将检测位置设置在显示区的几何中心与透过区11之间，兼顾两方面的调整效果。For this reason, the embodiment of the present invention does not use the geometric center of the display area as the detection position as in some related technologies, but sets the detection position between the geometric center of the display area and the transmission area 11 , taking into account both adjustment effects.
可选的，参照图6，根据主显示区校正伽马参数对透过区11的初始伽马参数进行校正得到透过区校正伽马参数，确定透过区11的伽马参数为透过区校正伽马参数(S103)包括：Optionally, referring to FIG. 6 , correct the initial gamma parameter of the transmission area 11 according to the correction gamma parameter of the main display area to obtain the correction gamma parameter of the transmission area, and determine the gamma parameter of the transmission area 11 as the transmission area Correcting gamma parameters (S103) includes:
S1031、根据主显示区校正伽马参数，通过二次非线性拟合对透过区11的初始伽马参数进行校正得到透过区校正伽马参数，确定透过区11的伽马参数为透过区校正伽马参数。S1031. Correct the gamma parameter according to the main display area, correct the initial gamma parameter of the transmission area 11 through quadratic nonlinear fitting to obtain the correction gamma parameter of the transmission area, and determine that the gamma parameter of the transmission area 11 is the transmission area. Overshoot gamma parameter.
可选的，透过区校正伽马参数通过以下公式计算：Optionally, the correction gamma parameter through the region is calculated by the following formula:
Y＝a(X+b)；Y=a(X+b);
其中，Y为表示透过区校正伽马参数的伽马向量，X为表示主显示区校正伽马参数的伽马向量，a、b分别为预设的系数。Wherein, Y is a gamma vector representing the correction gamma parameter of the transmission area, X is a gamma vector representing the correction gamma parameter of the main display area, and a and b are preset coefficients respectively.
作为本发明实施例的一种方式，可以是根据已知的透过区校正伽马参数，对透过区11原本设置的初始伽马参数进行二次非线性拟合，以得到透过区校正伽马参数。As a method of the embodiment of the present invention, it can be based on the known gamma parameters of the transmission area correction, and perform quadratic nonlinear fitting on the initial gamma parameters originally set in the transmission area 11 to obtain the transmission area correction Gamma parameter.
进一步的，主显示区校正伽马参数采用伽马向量X(x1,x2…xn)的形式表示，其中每个x表示主显示区12中一个绑点灰阶的伽马值。由此，可通过公式Y＝a(X+b)计算表示透过区校正伽马参数的伽马向量Y(y1,y2…yn)，其中每个y表示透过区11中一个绑点灰阶的伽马值。Further, the corrected gamma parameters in the main display area are expressed in the form of gamma vectors X(x1, x2 . Thus, the gamma vector Y(y1,y2...yn) representing the corrected gamma parameters of the transmission area can be calculated by the formula Y=a(X+b), where each y represents a binding point gray in the transmission area 11 The gamma value of the order.
其中，a为对应透过区11和主显示区12整体亮度差别的调节因子，而b为对应各邦点灰阶的亮度差别的调节因子，它们是预先设定的经验值或统计值。Wherein, a is an adjustment factor corresponding to the overall brightness difference between the transmissive area 11 and the main display area 12, and b is an adjustment factor corresponding to the brightness difference of each dot gray scale, which are preset empirical or statistical values.
例如，可以是对多个同型号显示面板的实际显示亮度进行统计，并利用最小二乘法等统计计算方法计算得到a和b。其中，示例性的，a的取值范围通常在0.8～1.2之间，进一步在0.9～1.1之间；而b的取值范围(以最大伽马值是4096为例)通常在-15～15之间，进一步在-10～10之间。For example, the actual display luminance of a plurality of display panels of the same model may be counted, and a and b may be obtained by using statistical calculation methods such as the least square method. Among them, for example, the value range of a is usually between 0.8 and 1.2, and further between 0.9 and 1.1; and the value range of b (taking the maximum gamma value of 4096 as an example) is usually between -15 and 15 between, and further between -10 and 10.
第二方面，本发明实施例提供一种面板显示伽马校正的装置。In a second aspect, an embodiment of the present invention provides an apparatus for gamma correction of a panel display.
本发明实施例的面板显示伽马校正的装置适用的显示面板的显示区包括用于设置屏下传感器的透过区和除透过区外的主显示区，透过区中的像素电连接第一参考电压端，主显示区中的像素电连接第二参考电压端。The display area of the display panel to which the panel display gamma correction device of the embodiment of the present invention is applicable includes the transmission area for setting the under-screen sensor and the main display area except the transmission area, and the pixels in the transmission area are electrically connected to the second A reference voltage terminal, the pixels in the main display area are electrically connected to the second reference voltage terminal.
参照图7，本发明实施例面板显示伽马校正的装置包括：Referring to Fig. 7, the device for panel display gamma correction according to the embodiment of the present invention includes:
控制模块，用于执行以下步骤：根据所述透过区的显示亮度与主显示区的显示亮度的差值，确定提供给所述第一参考电压端的电压为第一校正参考电压；根据所述主显示区的显示亮度分布与预设的标准伽马曲线，确定所述主显示区的伽马参数为主显示区校正伽马参数；根据所述主显示区校正伽马参数对透过区的初始伽马参数进行校正得到透过区校正伽马参数，确定所述透过区的伽马参数为透过区校正伽马参数；The control module is used to perform the following steps: according to the difference between the display brightness of the transmission area and the display brightness of the main display area, determine that the voltage provided to the first reference voltage terminal is the first correction reference voltage; according to the The display brightness distribution of the main display area and the preset standard gamma curve determine the gamma parameters of the main display area to correct the gamma parameters of the main display area; The initial gamma parameter is corrected to obtain the gamma parameter for correction in the transmission area, and the gamma parameter for the transmission area is determined as the correction gamma parameter for the transmission area;
驱动模块，用于驱动显示面板进行显示；A driver module, used to drive the display panel for display;
检测模块，用于检测显示面板的显示亮度。The detection module is used for detecting the display brightness of the display panel.
本发明实施例的面板显示伽马校正的装置用于实现以上面板显示伽马校正的方法，其中包括用于控制显示面板按照所需方式进行显示的驱动模块，以及用于检测显示面板实际的显示亮度的检测模块；而这些模块可在控制模块的控制下，实现以上面板显示伽马校正的方法。The panel display gamma correction device of the embodiment of the present invention is used to implement the above panel display gamma correction method, which includes a driving module for controlling the display panel to display in a required manner, and for detecting the actual display of the display panel Brightness detection modules; and these modules can realize the gamma correction method displayed on the above panel under the control of the control module.
应当理解，以上控制模块具体还可执行以上面板显示伽马校正的方法中的任意步骤。It should be understood that the above control module may specifically execute any step in the above method for panel display gamma correction.
应当理解，本发明实施例的面板显示伽马校正的装置中还可包括其它结构，例如还可包括烧录模块，其用于向显示面板写入确定出的第一校正参考电压、主显示区校正伽马参数、透过区校正伽马参数。It should be understood that the panel display gamma correction device of the embodiment of the present invention may also include other structures, for example, may also include a burning module, which is used to write the determined first correction reference voltage, main display area Calibrate the gamma parameters, and correct the gamma parameters through the area.
可以理解的是，以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本发明的保护范围。It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.
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| CN202210264513.8ACN114582281B (en) | 2022-03-17 | 2022-03-17 | Method and apparatus for panel display gamma correction |
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