WO2019218962A1 - 亮度补偿方法以及亮度补偿装置 - Google Patents

亮度补偿方法以及亮度补偿装置 Download PDF

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WO2019218962A1
WO2019218962A1 PCT/CN2019/086616 CN2019086616W WO2019218962A1 WO 2019218962 A1 WO2019218962 A1 WO 2019218962A1 CN 2019086616 W CN2019086616 W CN 2019086616W WO 2019218962 A1 WO2019218962 A1 WO 2019218962A1
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Prior art keywords
brightness
curved surface
pixels
surface area
display panel
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PCT/CN2019/086616
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English (en)
French (fr)
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金泰荣
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京东方科技集团股份有限公司
成都京东方光电科技有限公司
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Priority to US16/650,402 priority Critical patent/US11132976B2/en
Publication of WO2019218962A1 publication Critical patent/WO2019218962A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/03—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/14—Solving problems related to the presentation of information to be displayed

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a brightness compensation method and a brightness compensation device.
  • the display panel In the process of manufacturing the display panel, the display panel is unevenly displayed due to factors such as the process level and the purity of the raw material, and may also be referred to as the mura phenomenon.
  • the demura technique is used to compensate the display data of the pixels in the display panel.
  • the surface of the pixel is changed due to the existence of the curved surface area.
  • the brightness of the pixels of the curved area is lower than the brightness of the pixels of the planar area.
  • the demura compensation is performed according to the brightness data collected by the camera, it is easy to cause excessive compensation of the curved surface area.
  • the present disclosure provides a brightness compensation method for a curved display panel having a curved surface area.
  • the brightness compensation method includes: acquiring original brightness data of pixels of the curved surface area before forming the curved surface area; acquiring current brightness data of pixels of the curved surface area after forming the curved surface area; according to the original brightness Data and the current brightness data, determining a brightness compensation coefficient of a pixel of the curved surface region; and compensating the original brightness data according to the brightness compensation coefficient to obtain target brightness data of pixels of the curved surface region.
  • the original brightness data is a first average brightness of a column of pixels of the curved surface area before forming the curved surface area;
  • the current brightness data is a second average of the column of pixels after forming the curved surface area Brightness; wherein the curved display panel is obtained by the flat display panel after the cover is attached and subjected to bending treatment.
  • determining a brightness compensation coefficient of the pixel of the curved surface region according to the original brightness data and the current brightness data including: multiplying a ratio of the first average brightness to a second average brightness by the cover The plate corresponds to the transmittance of the column of pixels, thereby obtaining a brightness compensation coefficient for the column of pixels.
  • the method before acquiring the original luminance data before forming the curved region, the method further includes: performing demura compensation on the pixels in the planar display panel.
  • the brightness compensation method further includes: storing the brightness compensation coefficient in a driving chip of the curved display panel.
  • the present disclosure also provides a brightness compensation device for a curved display panel having a curved surface area.
  • the brightness compensation device includes: an acquisition module configured to acquire original brightness data of pixels of the curved surface area before forming the curved surface area, and collect current brightness of pixels of the curved surface area after forming the curved surface area a data determining unit configured to determine a brightness compensation coefficient of a pixel of the curved surface region based on the original brightness data and the current brightness data; and a compensation module configured to pair the original according to the brightness compensation coefficient
  • the luminance data is compensated to obtain target luminance data of pixels of the curved surface region.
  • the acquiring module includes: a first average brightness collecting sub-module configured to acquire a first average brightness of a column of pixels of the curved surface area before forming the curved surface area; and a second average brightness collecting sub-module And configured to collect a second average brightness of the column of pixels after forming the curved surface region; wherein the curved display panel is obtained by the flat display panel after the cover plate is attached and subjected to a bending process.
  • the determining module includes: a brightness compensation coefficient calculation unit configured to multiply a ratio of the first average brightness to a second average brightness by a transmittance of the cover plate corresponding to the column of pixels, thereby The brightness compensation coefficient of the column of pixels is obtained.
  • the brightness compensation device further comprises: a demura compensation module configured to perform demura compensation on pixels in the flat display panel.
  • the brightness compensation device further includes: a driving chip configured to drive the curved display panel and store the brightness compensation coefficient.
  • FIG. 1 is a flowchart of a brightness compensation method according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a curved display panel according to an embodiment of the present disclosure
  • Figure 3 is a cross-sectional view taken along line A-A' of the curved display panel shown in Figure 2;
  • FIG. 4 is a flowchart of a brightness compensation method according to another embodiment of the present disclosure.
  • FIG. 5 is a structural block diagram of a brightness compensation apparatus according to an embodiment of the present disclosure.
  • FIG. 6 is a structural block diagram of a brightness compensation apparatus according to another embodiment of the present disclosure.
  • the brightness compensation method may include the following steps.
  • Step 101 Acquire original brightness data of pixels of the curved surface area before forming the curved surface area; and collect current brightness data of pixels of the curved surface area after forming the curved surface area.
  • Step 102 Determine, according to the original brightness data and the current brightness data, a brightness compensation coefficient of a pixel of the curved surface area.
  • Step 103 Compensating the original brightness data according to the brightness compensation coefficient to obtain target brightness data of pixels of the curved surface area.
  • the curved display panel includes a planar area and a curved surface area.
  • the curved surface area may include a first curved surface area and a second curved surface area on both sides of the planar area, or may include only the first curved surface area or the second curved surface area located on one side of the planar area.
  • the brightness compensation coefficient c(x) may be stored in an external compensation device, and may also be stored in a Driver IC of the curved display panel.
  • FIG. 2 is a schematic structural view of a curved display panel according to an embodiment of the present disclosure
  • FIG. 3 is a cross-sectional view taken along line A-A' of the curved display panel shown in FIG. 2.
  • the lower left corner of the effective display area of the curved display panel is positioned as the coordinate origin 0, the short side is the x-axis, and the long side is the y-axis.
  • the first column of pixels x 1 x 2 columns of pixels to the second display plane located on the surface area of the panel
  • the main light exiting direction of the pixels on the first curved surface area and the pixels on the second curved surface area is not on the front side with respect to the pixels on the planar area.
  • the brightness of the pixels of the first curved surface area and the second curved surface area is lower than the brightness of the pixels of the planar area, and the brightness of the first curved surface area and the second curved surface area is attenuated. Therefore, it is necessary to compensate the luminance (ie, the current luminance data) of the attenuation region (ie, the first curved region and the second curved region), and obtain the luminance compensation coefficient c 1 (x) and the second of the pixels of the first curved region.
  • the brightness compensation coefficient c 2 (x) of the pixel of the curved surface area is necessary to compensate the luminance (ie, the current luminance data) of the attenuation region (ie, the first curved region and the second curved region.
  • the curved display panel shown in FIG. 2 and FIG. 3 has a curved surface area including a first curved surface area and a second curved surface area. It will be appreciated that when the surface area of the display surface of the panel only comprises a first surface region, and the first column to the pixel located in the first column of pixels x 1 first curved surface area of the panel display, the first column of pixels x 1 to the second column of pixels w When located in the plane area of the curved display panel, only the brightness compensation coefficient c 1 (x) of the pixels of the first curved area is obtained.
  • the surface area of the panel display surface comprises only a second surface region, and the first to the second column of pixels x 2 w columns of pixels located in the second curved surface area of the panel display, the first column of pixels x 2 columns of pixels to the second display panel located on the surface In the planar area, only the luminance compensation coefficient c 2 (x) of the pixels of the second curved surface region is acquired.
  • the first curved surface area and the second curved surface area may be symmetric with respect to the center of the curved display panel, that is, the bending of the first curved surface area and the second curved surface area
  • the shape is the same.
  • the first curved surface area and the second curved surface area may not be symmetrical to each other, that is, the curved shape of the first curved surface area and the second curved surface area are different, and the embodiment of the present disclosure does not limit this.
  • the camera is photographed from the front side, and the original luminance data L(x, y) of each pixel in the curved region is acquired.
  • the original brightness data L 1 (x, y) of each pixel in the first curved surface area is acquired, and each of the second curved surface areas is acquired
  • the raw luminance data L 2 (x, y) of the pixels is acquired.
  • the original luminance data L 1 (x, y) of each pixel in the first curved surface area is acquired.
  • the original luminance data L 2 (x, y) of each pixel in the second curved surface area is acquired.
  • the original luminance data L(x, y) of each pixel in the curved surface region is compensated according to the brightness compensation coefficient c(x) of the pixel of the curved surface region, and the target luminance data of the pixel of the curved surface region is obtained.
  • Lc(x, y) c(x) x L(x, y).
  • the brightness compensation coefficient c(x) when the brightness compensation coefficient c(x) is stored in the external compensation device, the original brightness data L(x, y) of each pixel in the curved surface region captured by the camera is input to the compensation device, in the compensation device The target luminance data Lc(x, y) of the pixel of the curved area is calculated.
  • the brightness compensation coefficient c(x) is stored in the Driver IC of the curved display panel
  • the demura compensation parameter is directly calculated from the original luminance data L(x, y) of each pixel in the curved surface region acquired by the camera.
  • the Driver IC corrects the demura compensation parameter according to the brightness compensation coefficient c(x), and corrects the demura compensation parameter to the demura compensation parameter corresponding to the target brightness data Lc(x, y).
  • the original luminance data L 1 (x, y) of the pixels of the first curved surface region is performed according to the brightness compensation coefficient c 1 (x) of the pixels of the first curved surface region.
  • the brightness attenuation of the first curved surface area and the second curved surface area after the curved surface region is formed is corrected by the brightness compensation coefficient, and the original brightness data of the pixels of the first curved surface area and the second curved surface area are compensated to the target brightness data in the front observation state.
  • the original luminance data L 1 (x, y) of each pixel in the first curved surface region is compensated according to the brightness compensation coefficient c 1 (x) of the pixel of the first curved surface region,
  • the target luminance data Lc 1 (x, y) of the pixels of the first curved surface region is obtained.
  • the original luminance data L 2 (x, y) of each pixel in the second curved surface region is compensated according to the brightness compensation coefficient c 2 (x) of the pixel of the second curved surface region
  • the target luminance data Lc 2 (x, y) of the pixel of the second curved surface region is obtained.
  • the brightness compensation coefficient c(x) of the pixel of the curved surface area may be a brightness compensation coefficient corresponding to each pixel, and the original brightness data of each pixel is multiplied by a corresponding brightness compensation coefficient to obtain target brightness data;
  • Each column of pixels corresponds to a compensation coefficient.
  • the same luminance compensation coefficient is multiplied by the original luminance data of each pixel to obtain target luminance data of each pixel.
  • step 101 when step 101 is performed, original luminance data of pixels of a planar area of the curved display panel may also be acquired. Since the pixels of the planar area have no change in the light-emitting direction, it is not necessary to compensate the pixels of the planar area, that is, the luminance compensation coefficient of the pixels of the planar area is 1. After the original luminance data of the pixels of the curved region is compensated to the target luminance data, demura compensation is performed on the pixels of the planar region and the curved region according to the original luminance data of the pixels of the planar region and the target luminance data of the pixels of the curved region.
  • the brightness compensation coefficient of the pixel of the curved surface area is determined according to the brightness of the pixel before the curved surface area is formed and the brightness of the pixel after the curved surface area is formed; and the original brightness data of the pixel of the curved surface area is collected;
  • the brightness compensation coefficient compensates the original brightness data to obtain the target brightness data of the pixels of the curved area.
  • the brightness compensation of the curved surface area is corrected by the brightness compensation coefficient, and the original brightness data of the pixels in the curved area is compensated to the target brightness data in the front observation state, thereby alleviating the excessive compensation of the curved surface area in the demura compensation operation.
  • the brightness compensation method may include the following steps.
  • Step 401 Acquire original brightness data of pixels of the curved surface area before forming the curved surface area; the original brightness data is a first average brightness of a column of pixels of the curved surface area before forming the curved surface area.
  • the first average brightness L p_avg (x) of each column of pixels is acquired.
  • the first average brightness refers to a flat display panel that does not have a cover plate, wherein an average value of brightness of all the pixels of one column, for example, a first average brightness of the pixels of the second column is all pixels of the second column.
  • the average brightness value refers to a flat display panel that does not have a cover plate, wherein an average value of brightness of all the pixels of one column, for example, a first average brightness of the pixels of the second column is all pixels of the second column. The average brightness value.
  • step 401 demura compensation is performed on pixels in the flat display panel.
  • demura compensation is performed on all the pixels in the flat display panel that are not attached to the cover, so that the flat display panel has good uniformity, and then the first average brightness of each column of pixels in the demura compensated flat display panel is collected.
  • Step 402 Acquire current brightness data of pixels of the curved surface area after forming the curved surface area; the current brightness data is a second average brightness of the column of pixels after forming the curved surface area.
  • the flat display panel is attached to the cover plate, and the curved display panel is obtained by bending, and the second average brightness L cover_avg (x) of each column of pixels in the curved display panel is collected again.
  • the second average brightness refers to the average value of the brightness of all the pixels of one column of the curved display panel.
  • the curved display panel is obtained by the flat display panel after the cover is attached and subjected to bending treatment.
  • Step 403 Determine, according to the first average brightness and the second average brightness of the pixels of the same column, respectively, corresponding brightness compensation coefficients of each column of pixels of the curved surface region.
  • the brightness compensation coefficient c(x) corresponding to each column of pixels of the curved surface area of the curved display panel is respectively calculated according to the first average brightness and the second average brightness of the pixels of the same column.
  • the brightness compensation coefficient of the first column pixel is calculated according to the first average brightness of the first column pixel and the second average brightness of the first column pixel, according to the second The first average luminance of the column pixels and the second average luminance of the pixels of the second column, the luminance compensation coefficients of the pixels of the second column are calculated, and so on, until the luminance compensation coefficients of the pixels of the 10th column are calculated.
  • step 401 may only acquire the first average brightness of each column of pixels in the curved surface area of the flat display panel, step 402 only Collecting a second average brightness of each column of pixels in the curved surface area of the curved display panel, and further calculating respective brightnesses of each column of the curved surface area according to the first average brightness and the second average brightness of the same column of pixels in the surface area Compensation factor.
  • the ratio of the first average brightness of the same column of pixels of the curved surface area to the second average brightness is multiplied by a specified coefficient, and the brightness compensation coefficients corresponding to each column of pixels of the curved surface area are respectively obtained.
  • the luminance compensation coefficient c(x) M(x) ⁇ L p_avg (x)/L cover_avg (x) corresponding to the pixel of the xth column, where M(x) is the xth column
  • M(x) is the xth column
  • the specified coefficient M(x) is a transmittance of the cover plate corresponding to a column of pixels.
  • M(x) specifically refers to the transmittance of the cover corresponding to the pixel of the xth column.
  • the thickness of the cover plate corresponding to each column of pixels is different, and the transmittance is also different.
  • the transmittance at the pixel of the xth column is unified into a constant M(x).
  • the curved display panel further includes a planar area, the specified coefficient M(x) of the planar area is a third average brightness of pixels of the planar area and a fourth pixel of the planar area a ratio of average brightness; wherein the third average brightness is an average of a second average brightness of each column of pixels in a planar area of the curved display panel, the fourth average brightness being a plane of the flat display panel The average of the first average brightness of the columns of pixels in the region.
  • the first average brightness a of each column of pixels is averaged.
  • the fourth average brightness obtained by the value is also a.
  • the curved display panel obtained by attaching the cover panel to the flat display panel and bending the same the second average brightness of each column of pixels in the planar area is b, and the second average brightness of each column of pixels b
  • the third average brightness obtained by averaging is also b.
  • the specified coefficient M(x) of the region can be calculated from the specified coefficient Mp of the planar region and the optical structure of the cover.
  • Step 404 Compensating the original brightness data according to the brightness compensation coefficient to obtain target brightness data of pixels of the curved surface area.
  • step 103 is similar to the principle of step 103 in the embodiment shown in FIG. 1, and details are not described herein again.
  • the corresponding brightness compensation coefficient of each column of pixels of the curved surface area is calculated.
  • the original luminance data of the pixels in the curved region is collected; the original luminance data is compensated according to the luminance compensation coefficient, and the target luminance data of the pixels in the curved region is obtained.
  • the brightness attenuation after forming the curved surface region is corrected by the brightness compensation coefficient, and the original brightness data of the pixels in the curved surface region is compensated to the target brightness data in the front observation state, thereby alleviating the excessive compensation of the curved surface region in the demura compensation operation.
  • FIG. 5 a structural block diagram of a brightness compensation apparatus 500 according to an embodiment of the present disclosure is provided.
  • the brightness compensation apparatus 500 is applied to a curved display panel having a curved surface area.
  • the brightness compensation device 500 of the embodiment of the present disclosure includes the following modules.
  • the collecting module 501 is configured to collect original brightness data of the pixels of the curved surface area before forming the curved surface area, and collect current brightness data of the pixels of the curved surface area after forming the curved surface area.
  • the determining module 502 is configured to determine a brightness compensation coefficient of a pixel of the curved surface area according to the original brightness data and the current brightness data.
  • the compensation module 503 is configured to compensate the original brightness data according to the brightness compensation coefficient to obtain target brightness data of pixels of the curved surface region.
  • FIG. 6 a structural block diagram of a brightness compensation apparatus 500 according to another embodiment of the present disclosure is shown.
  • the collection module 501 can include the following submodules.
  • the first average brightness collection sub-module 5011 is configured to acquire a first average brightness of a column of pixels of the curved surface area before forming the curved surface area; and a second average brightness collection sub-module 5012 configured to collect the column of pixels a second average brightness after forming the curved surface region; wherein the curved display panel is obtained by the flat display panel after the cover plate is attached and subjected to a bending process.
  • the determining module 502 includes: a brightness compensation coefficient calculation unit 5021 configured to multiply a ratio of the first average brightness to a second average brightness by a transmittance of the cover corresponding to the column of pixels Thereby obtaining the brightness compensation coefficient of the column of pixels.
  • the brightness compensation device 500 further includes: a demura compensation module 501' configured to perform demura compensation on pixels in the flat display panel.
  • the brightness compensation device 500 further includes a driving chip 504 configured to drive the curved display panel and store the brightness compensation coefficient.
  • the brightness compensation coefficient of the pixel of the curved area is determined, and the original brightness data of the pixel of the curved area is collected, according to The brightness compensation coefficient compensates the original brightness data to obtain the target brightness data of the pixels of the curved area.
  • the brightness attenuation after forming the curved surface region is corrected by the brightness compensation coefficient, and the original brightness data of the pixels in the curved surface region is compensated to the target brightness data in the front observation state, thereby alleviating the excessive compensation of the curved surface region in the demura compensation operation.
  • various "units” and “modules” in the embodiments may be implemented by a computer or a combination of a computer and appropriate sensors, each of which may be processed, for example, by a processor in the computer. to realise.

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Abstract

一种亮度补偿方法及装置（500），涉及显示技术领域。亮度补偿方法包括：采集曲面区域的像素在形成曲面区域前的原始亮度数据；采集曲面区域的像素在形成曲面区域后的当前亮度数据（101）；根据原始亮度数据和当前亮度数据，确定曲面区域的像素的亮度补偿系数（102）；以及根据亮度补偿系数对原始亮度数据进行补偿，得到曲面区域的像素的目标亮度数据（103）。

Description

亮度补偿方法以及亮度补偿装置
相关申请
本申请要求保护在2018年5月14日提交的申请号为201810455304.5的中国专利申请的优先权，该申请的全部内容以引用的方式结合到本文中。
技术领域
本公开涉及显示技术领域，特别是涉及一种亮度补偿方法以及亮度补偿装置。
背景技术
在制造显示面板的过程中，由于工艺水平、原材料纯度等因素易造成显示面板的显示不均匀现象，也可称为mura现象。为了减轻mura现象，采用demura技术对显示面板中的像素的显示数据进行补偿。
但是对于曲面显示面板，由于存在曲面区域，造成了像素的出光方向的改变。当采用相机从曲面显示面板的正面拍照时，曲面区域的像素的亮度低于平面区域的像素的亮度。根据相机采集到的亮度数据执行demura补偿时，易造成曲面区域的过度补偿。
发明内容
本公开提供了一种用于具有曲面区域的曲面显示面板的亮度补偿方法。所述亮度补偿方法包括：采集所述曲面区域的像素在形成所述曲面区域前的原始亮度数据；采集所述曲面区域的像素在形成所述曲面区域后的当前亮度数据；根据所述原始亮度数据和所述当前亮度数据，确定所述曲面区域的像素的亮度补偿系数；以及根据所述亮度补偿系数对所述原始亮度数据进行补偿，得到所述曲面区域的像素的目标亮度数据。
可选地，所述原始亮度数据是所述曲面区域的一列像素在形成所述曲面区域前的第一平均亮度；所述当前亮度数据是该列像素在形成所述曲面区域后的第二平均亮度；其中，所述曲面显示面板由平面显示面板在贴合盖板，并进行弯曲处理后得到。
可选地，根据所述原始亮度数据和所述当前亮度数据，确定所述曲面区域的像素的亮度补偿系数，包括：将所述第一平均亮度与第二平均亮度的比值乘以所述盖板对应于该列像素的透过率，从而得到该 列像素的亮度补偿系数。
可选地，采集所述曲面区域的像素在形成所述曲面区域前的原始亮度数据之前，所述方法还包括：对所述平面显示面板中的像素执行demura补偿。
可选地，所述亮度补偿方法还包括：将所述亮度补偿系数存储在所述曲面显示面板的驱动芯片中。
本公开还提供了一种用于具有曲面区域的曲面显示面板的亮度补偿装置。所述亮度补偿装置包括：采集模块，被配置为采集所述曲面区域的像素在形成所述曲面区域前的原始亮度数据，并采集所述曲面区域的像素在形成所述曲面区域后的当前亮度数据；确定模块，被配置为根据所述原始亮度数据和所述当前亮度数据，确定所述曲面区域的像素的亮度补偿系数；以及补偿模块，被配置为根据所述亮度补偿系数对所述原始亮度数据进行补偿，得到所述曲面区域的像素的目标亮度数据。
可选地，所述采集模块包括：第一平均亮度采集子模块，被配置为采集所述曲面区域的一列像素在形成所述曲面区域前的第一平均亮度；以及第二平均亮度采集子模块，被配置为采集该列像素在形成所述曲面区域后的第二平均亮度；其中，所述曲面显示面板由平面显示面板在贴合盖板，并进行弯曲处理后得到。
可选地，所述确定模块包括：亮度补偿系数计算单元，被配置为将所述第一平均亮度与第二平均亮度的比值乘以所述盖板对应于该列像素的透过率，从而得到该列像素的亮度补偿系数。
可选地，所述亮度补偿装置还包括：demura补偿模块，被配置为对所述平面显示面板中的像素执行demura补偿。
可选地，所述亮度补偿装置还包括：驱动芯片，被配置为驱动所述曲面显示面板并存储所述亮度补偿系数。
附图说明
图1示出了本公开实施例提供的一种亮度补偿方法的流程图；
图2示出了本公开实施例提供的一种曲面显示面板的结构示意图；
图3示出了图2所示的曲面显示面板中沿A-A’线的剖视图；
图4示出了本公开另一实施例提供的一种亮度补偿方法的流程图；
图5示出了本公开实施例提供的一种亮度补偿装置的结构框图；以 及
图6示出了本公开另一实施例提供的一种亮度补偿装置的结构框图。
具体实施方式
为使本公开的上述目的、特征和优点能够更加明显易懂，下面结合附图和具体实施方式对本公开作进一步详细的说明。
参照图1，示出了本公开实施例提供的一种亮度补偿方法的流程图，所述亮度补偿方法应用于具有曲面区域的曲面显示面板。所述亮度补偿方法可以包括如下步骤。
步骤101，采集所述曲面区域的像素在形成所述曲面区域前的原始亮度数据；采集所述曲面区域的像素在形成所述曲面区域后的当前亮度数据。
步骤102，根据所述原始亮度数据和所述当前亮度数据，确定所述曲面区域的像素的亮度补偿系数。
步骤103，根据所述亮度补偿系数对所述原始亮度数据进行补偿，得到所述曲面区域的像素的目标亮度数据。
在本公开实施例中，曲面显示面板包括平面区域和曲面区域。该曲面区域可以包括位于平面区域两侧的第一曲面区域和第二曲面区域，也可以只包括位于平面区域一侧的第一曲面区域或第二曲面区域。
根据曲面显示面板在形成曲面区域前的像素的亮度(即，原始亮度数据)和形成曲面区域后的像素的亮度(即，当前亮度数据)，确定曲面显示面板的曲面区域的像素的亮度补偿系数c(x)。
其中，在计算得到曲面区域的像素的亮度补偿系数c(x)后，亮度补偿系数c(x)可以存储在外部的补偿设备中，还可以存储在曲面显示面板的DriverIC(驱动芯片)内。
参照图2，示出了本公开实施例的一种曲面显示面板的结构示意图，图3为图2所示的曲面显示面板中沿A-A’线的剖视图。
如图2所示，曲面显示面板的有效显示区的左下角定位为坐标原点0，短边为x轴，长边为y轴。沿平行于x轴的A-A’线得到的剖视图如图3所示，第1列像素至第x 1列像素位于曲面显示面板的第一曲面区域，第x 2列像素至第w列像素位于曲面显示面板的第二曲面区域，第x 1列像素至第x 2列像素位于曲面显示面板的平面区域。
相对于平面区域上的像素，第一曲面区域上的像素和第二曲面区域上的像素的主要出光方向不在正面上。当采用相机从曲面显示面板的正面拍照时，第一曲面区域和第二曲面区域的像素的亮度低于平面区域的像素的亮度，拍照得到第一曲面区域和第二曲面区域的亮度发生衰减。因此，需要对衰减区域(即，第一曲面区域和第二曲面区域)的亮度(即，当前亮度数据)进行补偿，获取第一曲面区域的像素的亮度补偿系数c 1(x)和第二曲面区域的像素的亮度补偿系数c 2(x)。
需要说明的是，图2和图3中示出的曲面显示面板，其曲面区域包括第一曲面区域和第二曲面区域。可以理解的是，当曲面显示面板的曲面区域只包括第一曲面区域，且第1列像素至第x 1列像素位于曲面显示面板的第一曲面区域，第x 1列像素至第w列像素位于曲面显示面板的平面区域时，只获取第一曲面区域的像素的亮度补偿系数c 1(x)。当曲面显示面板的曲面区域只包括第二曲面区域，且第x 2列像素至第w列像素位于曲面显示面板的第二曲面区域，第1列像素至第x 2列像素位于曲面显示面板的平面区域时，只获取第二曲面区域的像素的亮度补偿系数c 2(x)。
当曲面显示面板的曲面区域包括第一曲面区域和第二曲面区域时，第一曲面区域和第二曲面区域可以相对于曲面显示面板的中心对称，即第一曲面区域和第二曲面区域的弯曲形状相同。当然，第一曲面区域和第二曲面区域也可以不相互对称，即第一曲面区域和第二曲面区域的弯曲形状不同，本公开实施例对此不做限制。
在本公开实施例中，使用相机从正面进行拍照，采集曲面区域中的每个像素的原始亮度数据L(x，y)。
当曲面显示面板的曲面区域包括第一曲面区域和第二曲面区域时，分别采集第一曲面区域中的每个像素的原始亮度数据L 1(x，y)，以及第二曲面区域中的每个像素的原始亮度数据L 2(x，y)。当曲面显示面板只具有第一曲面区域时，采集第一曲面区域中的每个像素的原始亮度数据L 1(x，y)。当曲面显示面板只具有第二曲面区域时，采集第二曲面区域中的每个像素的原始亮度数据L 2(x，y)。
在本公开实施例中，根据曲面区域的像素的亮度补偿系数c(x)对曲面区域中的每个像素的原始亮度数据L(x，y)进行补偿，得到曲面区域的像素的目标亮度数据Lc(x，y)，其中，Lc(x，y)＝c(x)×L(x， y)。
其中，当亮度补偿系数c(x)存储在外部的补偿设备中时，将相机采集到的曲面区域中的每个像素的原始亮度数据L(x，y)输入至补偿设备，在补偿设备中计算曲面区域的像素的目标亮度数据Lc(x，y)。当亮度补偿系数c(x)存储在曲面显示面板的Driver IC内，直接根据相机采集到的曲面区域中的每个像素的原始亮度数据L(x，y)计算demura补偿参数。在Driver IC内的demura功能中，Driver IC根据亮度补偿系数c(x)修正demura补偿参数，将demura补偿参数修正为目标亮度数据Lc(x，y)时对应的demura补偿参数。
当曲面区域包括第一曲面区域和第二曲面区域时，根据第一曲面区域的像素的亮度补偿系数c 1(x)对第一曲面区域的像素的原始亮度数据L 1(x，y)进行补偿，得到第一曲面区域的像素的目标亮度数据Lc 1(x，y)，以及根据第二曲面区域的像素的亮度补偿系数c 2(x)对第二曲面区域的像素的原始亮度数据L 2(x，y)进行补偿，得到第二曲面区域的像素的目标亮度数据Lc 2(x，y)，其中，Lc 1(x，y)＝c 1(x)×L 1(x，y)，Lc 2(x，y)＝c 2(x)×L 2(x，y)。
通过亮度补偿系数修正形成曲面区域后第一曲面区域和第二曲面区域的亮度衰减，将第一曲面区域和第二曲面区域的像素的原始亮度数据，补偿至正面观测状态下的目标亮度数据。
当曲面区域包括第一曲面区域时，根据第一曲面区域的像素的亮度补偿系数c 1(x)对第一曲面区域中的每个像素的原始亮度数据L 1(x，y)进行补偿，得到第一曲面区域的像素的目标亮度数据Lc 1(x，y)。当曲面区域包括第二曲面区域时，根据第二曲面区域的像素的亮度补偿系数c 2(x)对第二曲面区域中的每个像素的原始亮度数据L 2(x，y)进行补偿，得到第二曲面区域的像素的目标亮度数据Lc 2(x，y)。
其中，曲面区域的像素的亮度补偿系数c(x)，可以是每一个像素对应一个亮度补偿系数，对每一个像素的原始亮度数据乘以对应的亮度补偿系数，得到目标亮度数据；还可以是每一列像素对应一个补偿系数，对于同一列像素，根据各个像素的原始亮度数据乘以同一个亮度补偿系数，得到各个像素的目标亮度数据。
需要说明的是，在执行步骤101时，还可以采集曲面显示面板的平面区域的像素的原始亮度数据。由于平面区域的像素没有出光方向 的改变，因此，无需对平面区域的像素进行补偿，即平面区域的像素的亮度补偿系数为1。在将曲面区域的像素的原始亮度数据补偿至目标亮度数据之后，根据平面区域的像素的原始亮度数据和曲面区域的像素的目标亮度数据，对平面区域和曲面区域的像素执行demura补偿。
本公开实施例中，根据曲面显示面板在形成曲面区域前的像素的亮度和形成曲面区域后的像素的亮度，确定曲面区域的像素的亮度补偿系数；采集曲面区域的像素的原始亮度数据；根据亮度补偿系数对原始亮度数据进行补偿，得到曲面区域的像素的目标亮度数据。通过亮度补偿系数修正形成曲面区域后曲面区域的亮度衰减，将曲面区域的像素的原始亮度数据，补偿至正面观测状态下的目标亮度数据，减轻了demura补偿操作中对曲面区域的过度补偿。
参照图4，示出了本公开另一实施例提供的一种用于曲面显示面板的亮度补偿方法的流程图。所述亮度补偿方法可以包括如下步骤。
步骤401，采集所述曲面区域的像素在形成所述曲面区域前的原始亮度数据；所述原始亮度数据是所述曲面区域的一列像素在形成所述曲面区域前的第一平均亮度。
在本公开实施例中，针对未贴合盖板的平面显示面板，采集其每一列像素的第一平均亮度L p_avg(x)。
其中，对于第一曲面区域的每一列像素，即1≤x≤x 1，第一平均亮度L p_avg(x)＝g 1(x)；对于平面区域的每一列像素，即x 1＜x＜x 2，第一平均亮度L p_avg(x)＝a；对于第二曲面区域的每一列像素，即x 2≤x≤w，第一平均亮度L p_avg(x)＝g 2(x)。
需要说明的是，第一平均亮度指的是未贴合盖板的平面显示面板，其中一列的所有像素的亮度平均值，例如，第二列像素的第一平均亮度为第二列的所有像素的亮度平均值。
可选地，在执行步骤401之前，对所述平面显示面板中的像素执行demura补偿。
首先对未贴合盖板的平面显示面板中的所有像素执行demura补偿，使得平面显示面板具有良好的均一性，接着采集demura补偿后的平面显示面板中的每一列像素的第一平均亮度。
步骤402，采集所述曲面区域的像素在形成所述曲面区域后的当前亮度数据；所述当前亮度数据是该列像素在形成所述曲面区域后的第 二平均亮度。
在本公开实施例中，将平面显示面板与盖板贴合，并进行弯曲处理后得到曲面显示面板，再次采集曲面显示面板中的每一列像素的第二平均亮度L cover_avg(x)。
其中，对于第一曲面区域的每一列像素，即1≤x≤x 1，第二平均亮度L cover_avg(x)＝h 1(x)；对于平面区域的每一列像素，即x 1＜x＜x 2，由于将平面显示面板与盖板贴合并进行弯曲处理后得到的曲面显示面板，其平面区域依然为平面，因此，平面区域的每一列像素的第二平均亮度可使用同一平均值，即第二平均亮度L cover_avg(x)＝b，但是由于盖板会对光线的透过率有影响，因此，第二平均亮度b小于第一平均亮度a；对于第二曲面区域的每一列像素，即x 2≤x≤w，第二平均亮度L cover_avg(x)＝h 2(x)。
需要说明的是，第二平均亮度指的是曲面显示面板的其中一列的所有像素的亮度平均值。
其中，所述曲面显示面板由所述平面显示面板在贴合盖板，并进行弯曲处理后得到。
步骤403，根据同一列像素的第一平均亮度和第二平均亮度，分别确定所述曲面区域的每一列像素各自对应的亮度补偿系数。
在公开实施例中，根据同一列像素的第一平均亮度和第二平均亮度，分别计算曲面显示面板的曲面区域的每一列像素各自对应的亮度补偿系数c(x)。
例如，曲面区域包括第1列像素至第10列像素，则根据第1列像素的第一平均亮度和第1列像素的第二平均亮度，计算第1列像素的亮度补偿系数，根据第2列像素的第一平均亮度和第2列像素的第二平均亮度，计算第2列像素的亮度补偿系数，以此类推，直至计算得到第10列像素的亮度补偿系数。
在本公开另一种实施例中，由于只需对曲面区域的像素的亮度进行补偿，因此，步骤401可以只采集平面显示面板的曲面区域中的每一列像素的第一平均亮度，步骤402只采集曲面显示面板的曲面区域中的每一列像素的第二平均亮度，进而根据曲面区域中的同一列像素的第一平均亮度和第二平均亮度，分别计算曲面区域的每一列像素各自对应的亮度补偿系数。
具体的，将所述曲面区域的同一列像素的第一平均亮度与第二平均亮度的比值乘以指定系数，分别得到所述曲面区域的每一列像素各自对应的亮度补偿系数。
对于曲面显示面板的曲面区域，其第x列像素对应的亮度补偿系数c(x)＝M(x)×L p_avg(x)/L cover_avg(x)，其中，M(x)为第x列像素对应的指定系数。
由于曲面区域和平面区域对应的盖板厚度不同，且盖板会影响光线的透过率，因此，L p_avg(x)×M(x)＝L cover_avg(x)×c(x)，等式两侧的含义为在平面显示面板上贴合了盖板后的亮度，则可推知，c(x)＝M(x)×L p_avg(x)/L cover_avg(x)。
具体的，指定系数M(x)为所述盖板对应于一列像素的透过率。对于第x列像素对应的指定系数，M(x)具体指的是盖板对应于第x列像素的透过率。对于平面区域，盖板的厚度和透过率相同，即x 1＜x＜x 2时，M(x)＝Mp。对于曲面区域，其各列像素对应的盖板的厚度不相同，透过率也不相同。将第x列像素处的透过率统一为常数M(x)。当曲面显示面板包括第一曲面区域时，其每一列像素各自对应的亮度补偿系数c 1(x)＝M(x)×L p_avg(x)/L cover_avg(x)＝M(x)×g 1(x)/h 1(x)。当曲面显示面板包括第二曲面区域时，其每一列像素各自对应的亮度补偿系数c 2(x)＝M(x)×L p_avg(x)/L cover_avg(x)＝M(x)×g 2(x)/h 2(x)。当曲面显示面板包括第一曲面区域和第二曲面区域时，第一曲面区域中每一列像素各自对应的亮度补偿系数c 1(x)＝M(x)×g 1(x)/h 1(x)，第二曲面区域中每一列像素各自对应的亮度补偿系数c 2(x)＝M(x)×g 2(x)/h 2(x)。
在本公开实施例中，所述曲面显示面板还包括平面区域，所述平面区域的指定系数M(x)为所述平面区域的像素的第三平均亮度与所述平面区域的像素的第四平均亮度的比值；其中，所述第三平均亮度为所述曲面显示面板的平面区域中的各列像素的第二平均亮度的平均值，所述第四平均亮度为所述平面显示面板的平面区域中的各列像素的第一平均亮度的平均值。
对于未贴合盖板并进行弯曲处理前的平面显示面板，由于平面显示面板的平面区域中的每一列像素的第一平均亮度均为a，则对各列像素的第一平均亮度a取平均值得到的第四平均亮度也为a。相应的，对平面显示面板贴合盖板并进行弯曲处理后得到的曲面显示面板，其平 面区域中的每一列像素的第二平均亮度均为b，则对各列像素的第二平均亮度b取平均值得到的第三平均亮度也为b。
其中，平面区域的指定系数M(x)可以为平面区域的像素的第三平均亮度b与平面区域的像素的第四平均亮度a的比值，即M(x)＝Mp＝b/a；曲面区域的指定系数M(x)可根据平面区域的指定系数Mp和盖板的光学结构计算得到。
步骤404，根据所述亮度补偿系数对所述原始亮度数据进行补偿，得到所述曲面区域的像素的目标亮度数据。
此步骤与图1所示实施例的步骤103原理类似，在此不再赘述。
在本公开实施例中，根据平面显示面板中的每一列像素的第一平均亮度，以及曲面显示面板中的每一列像素的第二平均亮度，计算曲面区域的每一列像素各自对应的亮度补偿系数；采集曲面区域的像素的原始亮度数据；根据亮度补偿系数对原始亮度数据进行补偿，得到曲面区域的像素的目标亮度数据。通过亮度补偿系数修正形成曲面区域后的亮度衰减，将曲面区域的像素的原始亮度数据，补偿至正面观测状态下的目标亮度数据，减轻了demura补偿操作中对曲面区域的过度补偿。
参照图5，示出了本公开实施例提供的一种亮度补偿装置500的结构框图，该亮度补偿装置500应用于具有曲面区域的曲面显示面板。
本公开实施例的亮度补偿装置500包括以下模块。
采集模块501，被配置为采集所述曲面区域的像素在形成所述曲面区域前的原始亮度数据，并采集所述曲面区域的像素在形成所述曲面区域后的当前亮度数据。
确定模块502，被配置为根据所述原始亮度数据和所述当前亮度数据，确定所述曲面区域的像素的亮度补偿系数。
补偿模块503，被配置为根据所述亮度补偿系数对所述原始亮度数据进行补偿，得到所述曲面区域的像素的目标亮度数据。
参照图6，示出了本公开另一实施例提供的一种亮度补偿装置500的结构框图。
可选地，所述采集模块501可以包括以下子模块。
第一平均亮度采集子模块5011，被配置为采集所述曲面区域的一列像素在形成所述曲面区域前的第一平均亮度；以及第二平均亮度采 集子模块5012，被配置为采集该列像素在形成所述曲面区域后的第二平均亮度；其中，所述曲面显示面板由平面显示面板在贴合盖板，并进行弯曲处理后得到。
可选地，所述确定模块502包括：亮度补偿系数计算单元5021，被配置为将所述第一平均亮度与第二平均亮度的比值乘以所述盖板对应于该列像素的透过率，从而得到该列像素的亮度补偿系数。
可选地，所述亮度补偿装置500还包括：demura补偿模块501′，被配置为对所述平面显示面板中的像素执行demura补偿。
可选地，所述亮度补偿装置500还包括：驱动芯片504，被配置为驱动所述曲面显示面板并存储所述亮度补偿系数。
本公开实施例中，根据曲面显示面板在形成曲面区域前的像素的亮度和形成曲面区域后的像素的亮度，确定曲面区域的像素的亮度补偿系数，采集曲面区域的像素的原始亮度数据，根据亮度补偿系数对原始亮度数据进行补偿，得到曲面区域的像素的目标亮度数据。通过亮度补偿系数修正形成曲面区域后的亮度衰减，将曲面区域的像素的原始亮度数据，补偿至正面观测状态下的目标亮度数据，减轻了demura补偿操作中对曲面区域的过度补偿。
在本公开的上下文中，实施例中的各个“单元”和“模块”可以由计算机或者计算机与适当传感器的结合来实现，各个单元、模块的处理过程均可以例如由所述计算机中的处理器来实现。
对于前述的各方法实施例，为了简单描述，故将其都表述为一系列的动作组合，但是本领域技术人员应该知悉，本公开并不受所描述的动作顺序的限制，因为依据本公开，某些步骤可以采用其他顺序或者同时进行。其次，本领域技术人员也应该知悉，说明书中所描述的实施例均属于可选实施例，所涉及的动作和模块并不一定是本公开所必须的。
本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。
最后，还需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系 或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、商品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、商品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个......”限定的要素，并不排除在包括所述要素的过程、方法、商品或者设备中还存在另外的相同要素。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此。任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (10)

  1. 一种用于具有曲面区域的曲面显示面板的亮度补偿方法，包括：
    采集所述曲面区域的像素在形成所述曲面区域前的原始亮度数据；采集所述曲面区域的像素在形成所述曲面区域后的当前亮度数据；
    根据所述原始亮度数据和所述当前亮度数据，确定所述曲面区域的像素的亮度补偿系数；以及
    根据所述亮度补偿系数对所述原始亮度数据进行补偿，得到所述曲面区域的像素的目标亮度数据。
  2. 根据权利要求1所述的方法，其中，所述原始亮度数据是所述曲面区域的一列像素在形成所述曲面区域前的第一平均亮度；所述当前亮度数据是该列像素在形成所述曲面区域后的第二平均亮度；
    其中，所述曲面显示面板由平面显示面板在贴合盖板，并进行弯曲处理后得到。
  3. 根据权利要求2所述的方法，其中，根据所述原始亮度数据和所述当前亮度数据，确定所述曲面区域的像素的亮度补偿系数，包括：
    将所述第一平均亮度与第二平均亮度的比值乘以所述盖板对应于该列像素的透过率，从而得到该列像素的亮度补偿系数。
  4. 根据权利要求2所述的方法，其中，采集所述曲面区域的像素在形成所述曲面区域前的原始亮度数据之前，所述方法还包括：
    对所述平面显示面板中的像素执行demura补偿。
  5. 根据权利要求1-4任一项所述的方法，还包括：将所述亮度补偿系数存储在所述曲面显示面板的驱动芯片中。
  6. 一种用于具有曲面区域的曲面显示面板的亮度补偿装置，包括：
    采集模块，被配置为采集所述曲面区域的像素在形成所述曲面区域前的原始亮度数据，并采集所述曲面区域的像素在形成所述曲面区域后的当前亮度数据；
    确定模块，被配置为根据所述原始亮度数据和所述当前亮度数据，确定所述曲面区域的像素的亮度补偿系数；以及
    补偿模块，被配置为根据所述亮度补偿系数对所述原始亮度数据进行补偿，得到所述曲面区域的像素的目标亮度数据。
  7. 根据权利要求6所述的亮度补偿装置，其中，所述采集模块包括：
    第一平均亮度采集子模块，被配置为采集所述曲面区域的一列像素在形成所述曲面区域前的第一平均亮度；以及第二平均亮度采集子模块，被配置为采集该列像素在形成所述曲面区域后的第二平均亮度；
    其中，所述曲面显示面板由平面显示面板在贴合盖板，并进行弯曲处理后得到。
  8. 根据权利要求7所述的亮度补偿装置，其中，所述确定模块包括：
    亮度补偿系数计算单元，被配置为将所述第一平均亮度与第二平均亮度的比值乘以所述盖板对应于该列像素的透过率，从而得到该列像素的亮度补偿系数。
  9. 根据权利要求7所述的亮度补偿装置，还包括：
    demura补偿模块，被配置为对所述平面显示面板中的像素执行demura补偿。
  10. 根据权利要求6-9任一项所述的亮度补偿装置，还包括：
    驱动芯片，被配置为驱动所述曲面显示面板并存储所述亮度补偿系数。
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