WO2020177164A1 - 显示面板充电方法以及装置 - Google Patents

显示面板充电方法以及装置 Download PDF

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Publication number
WO2020177164A1
WO2020177164A1 PCT/CN2019/079469 CN2019079469W WO2020177164A1 WO 2020177164 A1 WO2020177164 A1 WO 2020177164A1 CN 2019079469 W CN2019079469 W CN 2019079469W WO 2020177164 A1 WO2020177164 A1 WO 2020177164A1
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Prior art keywords
display panel
pattern
charging time
charging
target
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PCT/CN2019/079469
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English (en)
French (fr)
Inventor
周亚萍
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Publication of WO2020177164A1 publication Critical patent/WO2020177164A1/zh
Anticipated expiration legal-status Critical
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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 by control of light from an independent source
    • G09G3/36Control 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 by control of light from an independent source using liquid crystals

Definitions

  • This application relates to the field of display, and in particular to a method and device for charging a display panel.
  • the data signal from the source driver needs to reach the gate drive circuit corresponding to the pixel circuit through a long transmission line. Affected by the resistance/capacitance on the transmission path such as the data line, the data signal reaches the gate drive circuit at different locations with delay.
  • the charging time of all pixels in the display panel is based on the standard charging time (the charging time required for the luminous brightness of the pixel to reach a specific brightness under a specific gray-scale voltage, the specific brightness is the specific gray-scale voltage in the gray-scale voltage-luminous brightness curve Corresponding brightness within), the delay of the data signal will cause some pixels to appear incorrectly charged.
  • the present application provides a method and device for charging a display panel, so as to solve the technical problem of incorrect charging when charging the existing display panel.
  • This application provides a method for charging a display panel, which includes:
  • each pixel in the display panel is charged according to the corresponding relationship between the driving voltage of the display panel and the charging time.
  • the step of determining the test pattern of the display panel includes:
  • the step of determining the test pattern of the display panel includes:
  • the step of determining the test pattern of the display panel includes:
  • the step of determining the test pattern of the display panel includes:
  • the step of determining the test pattern of the display panel includes:
  • a stripe pattern is used as the test pattern, and the stripe direction of the stripe pattern is the same as the pixel arrangement direction of the display panel.
  • the step of selecting reference pixels in the display panel includes:
  • the reference pixel is determined from the candidate points according to the change curve of the light-emitting brightness of each candidate point and the charging time.
  • the step of selecting reference pixels in the display panel includes:
  • a reference pixel is selected among all the pixels of the display panel.
  • the step of obtaining the target charging time required for the emission brightness of the reference pixel to reach the target brightness under the target driving voltage includes:
  • the target charging time is determined according to the change curve of the light-emitting brightness of the reference pixel and the charging time.
  • the step of determining the target charging time according to the change curve of the luminous brightness of the reference pixel and the charging time includes:
  • the charging time corresponding to the middle position of the gentle zone is selected as the target charging time
  • the charging time corresponding to the maximum occurrence brightness in the change curve is selected as the target charging time.
  • the present application provides a display panel charging device, which includes:
  • Pattern selection module used to determine the test pattern of the display panel
  • a pixel selection module for selecting reference pixels in the display panel
  • a pattern driving module for driving the display panel to display the test pattern
  • a time acquisition module for acquiring the target charging time required for the light-emitting brightness of the reference pixel to reach the target brightness under the target driving voltage
  • a time determining module configured to determine the corresponding relationship between the driving voltage of the display panel and the charging time according to the corresponding relationship between the target driving voltage of the reference pixel and the target charging time;
  • the pixel charging module is used to charge each pixel in the display panel according to the corresponding relationship between the driving voltage of the display panel and the charging time when a picture needs to be displayed.
  • the pattern selection module is used to: obtain the pixel arrangement of the display panel; according to the pixel arrangement, determine the signal of the data line when the display panel displays a preset pattern Change graph; select the corresponding preset pattern when the signal change graph meets the requirements as the test pattern.
  • the pattern selection module is used to: drive the display panel to display a preset pattern; obtain a signal change diagram of the data line when the display panel displays the preset pattern; select a signal change diagram The corresponding preset pattern when the requirement is met is used as the test pattern.
  • the pattern selection module is used to: acquire the process parameters of the display panel; find the preset pattern corresponding to the process parameter; use the found preset pattern as the test pattern.
  • the pattern selection module is used to: obtain the device type of the display panel; find a preset pattern corresponding to the device type; use the found preset pattern as the test pattern.
  • the pattern selection module is used to use a stripe pattern as the test pattern, and the stripe direction of the stripe pattern is the same as the pixel arrangement direction of the display panel.
  • the pixel selection module is used to: obtain candidate points of the display panel; drive the display panel to display the test pattern, and obtain the light emission of each candidate point under the target driving voltage
  • the change curve of brightness and charging time; the reference pixel is determined from the candidate points according to the change curve of the luminous brightness of each candidate point and the charging time.
  • the pixel selection module is used to: obtain the size and driving mode of the display panel; and select reference pixels among all pixels of the display panel according to the size and driving mode.
  • the time acquisition module is used to drive the display panel to display the test pattern, and acquire the change curve of the light-emitting brightness of the reference pixel and the charging time under the target driving voltage;
  • the target charging time is determined according to the change curve of the light-emitting brightness of the reference pixel and the charging time.
  • the time acquisition module is used to select the charging time corresponding to the middle position of the gentle zone as the target charging time when the change trend of the change curve is gentle;
  • the charging time corresponding to the maximum brightness in the change curve is used as the target charging time.
  • the present application provides a display panel charging method and device.
  • the method includes driving the display panel to display a test pattern, obtaining a target charging time required for the emission brightness of a reference pixel to reach the target brightness under a target driving voltage, according to the target of the reference pixel.
  • the corresponding relationship between the driving voltage and the target charging time is used to determine the corresponding relationship between the driving voltage and the charging time of each pixel in the display panel.
  • the corresponding relationship between the driving voltage of the display panel and the charging time is determined.
  • the pixels in the display panel are charged; that is, when charging in this application, the display panel is charged according to the charging time of the reference pixels, such as the pixels most likely to be mischarged in the display panel, instead of charging according to the standard charging time In this way, the phenomenon of incorrect charging of some pixels caused by the delay of the data signal can be overcome, and the technical problem of incorrect charging during charging of the existing display panel can be solved.
  • FIG. 1 is a flowchart of a display panel charging method provided by an embodiment of the application
  • FIG. 2 is a schematic structural diagram of a display panel charging device provided by an embodiment of the application.
  • FIG. 3 is a schematic diagram of a display panel provided by an embodiment of the application.
  • FIG. 4 is a schematic diagram of pixel arrangement provided by an embodiment of the application.
  • FIG. 5 is a signal change diagram of a data line provided by an embodiment of the application.
  • FIG. 6 is a variation curve of luminous intensity-charging time of candidate points provided by an embodiment of the application.
  • FIG. 7 is a variation curve of luminous intensity-charging time of a reference pixel provided by an embodiment of the application.
  • the embodiment of the present application can solve this problem.
  • the display panel charging method provided by the present application includes:
  • S104 Obtain a target charging time required for the emission brightness of the reference pixel to reach the target brightness under the target driving voltage
  • S105 Determine the correspondence between the drive voltage and the charging time of each pixel in the display panel according to the correspondence between the target driving voltage of the reference pixel and the target charging time;
  • This embodiment provides a method for charging a display panel.
  • the method includes driving the display panel to display a test pattern, obtaining a target charging time required for the emission brightness of a reference pixel to reach the target brightness under a target driving voltage, and according to the target driving of the reference pixel The corresponding relationship between the voltage and the target charging time, and then determine the corresponding relationship between the driving voltage of each pixel in the display panel and the charging time.
  • the corresponding relationship between the driving voltage of the display panel and the charging time is determined.
  • the pixels in the display panel are charged; that is, when charging in this application, the display panel is charged according to the charging time of the reference pixels, such as the pixels most likely to be mischarged in the display panel, instead of charging according to the standard charging time. In this way, the phenomenon of incorrect charging of some pixels caused by the delay of the data signal can be overcome, and the technical problem of incorrect charging during charging of the existing display panel can be solved.
  • the step of determining the test pattern of the display panel includes:
  • the pixel arrangement of the display panel can be various, as shown in Flip in FIG. 4 pixel architecture, etc.;
  • the signal change diagram of the data line is as shown in FIG. 5;
  • the signal change pattern of the data line is different and can be inferred. Therefore, in this embodiment, the test pattern can be determined without driving the display panel to display the preset pattern.
  • the corresponding preset pattern when the signal change map meets the requirements means that the signal of each data line changes in each frame.
  • the step of determining the test pattern of the display panel includes:
  • the display panel is directly driven to display a preset pattern, and then the signal change graph of the data line is obtained, and then the corresponding preset pattern when the signal change graph meets the requirement is selected as the test pattern.
  • the step of determining the test pattern of the display panel includes:
  • test pattern is searched according to the process parameters of the display panel, and the solution is simple to implement.
  • the step of determining the test pattern of the display panel includes:
  • test pattern is searched according to the device type of the display panel, and the solution is simple to implement.
  • the pixels of the display panel are generally arranged in rows or columns, and the corresponding best test pattern is a stripe pattern. Different columns or rows display stripes of different colors. Therefore, in one embodiment, the test pattern of the display panel is determined
  • the steps include:
  • a stripe pattern is used as the test pattern, and the stripe direction of the stripe pattern is the same as the pixel arrangement direction of the display panel.
  • the stripe pattern is directly used as the test pattern, and the solution is simple to implement.
  • the reference pixel is the pixel most likely to be mischarged in the display panel. This pixel can be determined according to the luminescence curve. Therefore, in an embodiment, the step of selecting the reference pixel in the display panel includes:
  • Candidate points refer to pixel positions in the display panel that are prone to errors, generally 9 positions as shown in FIG. 3;
  • the reference pixel is determined from the candidate points according to the change curve of the light-emitting brightness of each candidate point and the charging time.
  • Pixels that are prone to mischarging have a relatively large range of light-emitting brightness corresponding to the change curve, so one or more reference pixels can be determined according to the change curve.
  • the reference pixel is the pixel most likely to be mischarged in the display panel.
  • the position of this pixel is generally fixed in the display panel. Therefore, in an embodiment, the step of selecting the reference pixel in the display panel includes :
  • a reference pixel is selected among all the pixels of the display panel.
  • the size refers to the size of the display panel, such as 65 inches or 75 inches.
  • the driving methods include single-source driving and dual-source driving, both of which affect the transmission path of the data signal.
  • the pixel at B is directly used as the reference pixel.
  • the step of obtaining the target charging time required for the emission brightness of the reference pixel to reach the target brightness under the target driving voltage includes:
  • the target charging time is determined according to the change curve of the light-emitting brightness of the reference pixel and the charging time.
  • the step of determining the target charging time according to the curve of the light-emitting brightness of the reference pixel and the charging time includes:
  • the charging time corresponding to the middle position of the gentle zone is selected as the target charging time, as shown in (1) in Figure 7;
  • the charging time corresponding to the maximum brightness in the change curve is selected as the target charging time, as shown in (2) in FIG. 7.
  • the display panel charging device provided by the present application includes:
  • the pattern selection module 21 is used to determine the test pattern of the display panel
  • the pixel selection module 22 is used to select reference pixels in the display panel
  • the pattern driving module 23 is used to drive the display panel to display the test pattern
  • the time acquisition module 24 is configured to acquire the target charging time required for the emission brightness of the reference pixel to reach the target brightness under the target driving voltage;
  • the time determining module 25 is configured to determine the corresponding relationship between the driving voltage of the display panel and the charging time according to the corresponding relationship between the target driving voltage of the reference pixel and the target charging time;
  • the pixel charging module 26 is used to charge each pixel in the display panel according to the corresponding relationship between the driving voltage of the display panel and the charging time when a picture needs to be displayed.
  • This embodiment provides a display panel charging device.
  • the target charging time required for the emission brightness of the reference pixel to reach the target brightness under the target driving voltage is obtained, according to the target driving voltage of the reference pixel and The corresponding relationship between the target charging time and the corresponding relationship between the driving voltage of each pixel in the display panel and the charging time are determined.
  • the corresponding relationship between the driving voltage of the display panel and the charging time is determined for the display panel.
  • Each pixel in the battery is charged; that is, when charging in this application, the display panel is charged according to the charging time of the reference pixel, such as the pixel that is most likely to be mischarged in the display panel, instead of charging according to the standard charging time. It can overcome the phenomenon of incorrect charging of some pixels caused by the delay of the data signal, and solves the technical problem of incorrect charging during charging of the existing display panel.
  • the pattern selection module 21 is configured to: obtain the pixel arrangement of the display panel; according to the pixel arrangement, determine the signal change diagram of the data line when the display panel displays a preset pattern ; Select the corresponding preset pattern when the signal change graph meets the requirements as the test pattern.
  • the pattern selection module 21 is configured to: drive the display panel to display a preset pattern; obtain a signal change graph of the data line when the display panel displays the preset pattern; select a signal change graph that meets requirements The preset pattern corresponding to the time is used as the test pattern.
  • the pattern selection module 21 is configured to: obtain the process parameters of the display panel; find the preset pattern corresponding to the process parameter; use the found preset pattern as the test pattern.
  • the pattern selection module 21 is configured to: obtain the device type of the display panel; search for a preset pattern corresponding to the device type; use the found preset pattern as the test pattern.
  • the pattern selection module 21 is configured to use a stripe pattern as the test pattern, and the stripe direction of the stripe pattern is the same as the pixel arrangement direction of the display panel.
  • the pixel selection module 22 is configured to: obtain candidate points of the display panel; drive the display panel to display the test pattern, and obtain the luminous brightness of each candidate point under the target driving voltage and The change curve of the charging time; according to the change curve of the light-emitting brightness of each candidate point and the charging time, the reference pixel is determined from the candidate points.
  • the pixel selection module 22 is configured to: obtain the size and driving mode of the display panel; and select a reference pixel from all pixels of the display panel according to the size and driving mode.
  • the time acquisition module 24 is used to drive the display panel to display the test pattern, and acquire the light-emitting brightness of the reference pixel and the change curve of the charging time under the target driving voltage; The change curve of the luminous brightness of the reference pixel and the charging time determines the target charging time.
  • the time acquisition module 24 is configured to: when the change trend of the change curve is gentle, select the charging time corresponding to the middle position of the gentle zone as the target charging time; otherwise, select the change The charging time corresponding to the maximum occurrence brightness in the curve is used as the target charging time.
  • the GOA signal is output from the source side IC and must be transmitted through GOA Busline 10. Due to the RC of GOA Busline 10 The Dealy problem causes a certain difference in the GOA-related signal input between the Source side and the Source side. This difference can directly affect the Gate waveform output. Therefore, when the actual charging is confirmed, the location of the charging time should be integrated for the entire panel.
  • the RC Delay status of Gate_line, Data_line, GOA Busline 10 and the selection of charging time is based on wrong charging. As shown in Figure 3, for the nine points on the panel (that is, candidate point 1 to candidate point 9 above), The point most likely to be mischarged (ie the reference pixel above) should be selected as the location for the charging time of the entire panel.
  • the pattern for confirming the charging time (ie the test pattern above) is also important.
  • the Patten should be able to reflect the difference in charging caused by the difference in charging time, which is reflected on the panel, which is the brightness difference. Based on the above conditions, the confirmation of the charging time should first select a suitable pattern, and then adjust the different charging time based on the point where the panel is most likely to be incorrectly charged, and select the charging time corresponding to the maximum brightness as the maximum of the entire panel. Best charging time.
  • this embodiment proposes a method for confirming the charging time on an actual panel, which includes the following steps:
  • the Patten should be able to reflect the difference in charging caused by the difference in charging time.
  • each data line (Data Line 1 to Data Line 3) of the Pattern is every frame All changes, corresponding to the simulation during panel design.
  • the existing preset patterns include stripe pattern H-stripe Pattern and green pure pattern G Pattern, when the display panel displays the stripe pattern H-stripe Pattern, the signal change diagram of the data line is shown in Figure 5 (a), when the display panel displays the green pure pattern G Pattern, the signal change diagram of the data line is shown in Figure 5 Shown in (b). It can be seen from Figure 5 that when the display panel displays the green pure pattern G Pattern, not every piece of Data The line changes every frame, so H-Stripe Pattern is more accurate as a confirmation pattern of charging time.
  • the nine points of the measuring panel are in H-stripe
  • the brightness change curve with charging time because the brightness change range of the change curve corresponding to candidate point 2 is the largest
  • the position where the panel is most likely to be mischarged is the middle point on the opposite side of the Source, that is, the pixel corresponding to candidate point 2.
  • the horizontal axis t is the actual charging time
  • the vertical axis CR% is the ratio of the brightness to the reference brightness
  • the reference brightness is the brightness of the corresponding gray-scale voltage in the gray-scale voltage-luminous brightness curve.
  • the embodiments of the present application provide a display panel charging method and device.
  • the method includes driving the display panel to display a test pattern, obtaining a target charging time required for the emission brightness of a reference pixel to reach the target brightness under a target driving voltage, and according to the reference pixel
  • the corresponding relationship between the target driving voltage and the target charging time is determined, and the corresponding relationship between the driving voltage and the charging time of each pixel in the display panel is determined.
  • Each pixel in the display panel is charged; that is, when charging in this application, the display panel is charged according to the reference pixel, such as the charging time of the pixel most likely to be mischarged in the display panel, instead of the standard charging time Charging can overcome the phenomenon of incorrect charging of some pixels caused by the delay of the data signal, and solve the technical problem of incorrect charging during charging of the existing display panel.

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Abstract

一种显示面板充电方法以及装置,充电方法包括,获取在目标驱动电压下,基准像素的发光亮度到达目标亮度所需要的目标充电时间(S104);根据基准像素的目标驱动电压与目标充电时间的对应关系,确定显示面板内各像素的驱动电压与充电时间的对应关系(S105);并根据显示面板的驱动电压与充电时间的对显示面板内各像素进行充电(S106)。

Description

显示面板充电方法以及装置 技术领域
本申请涉及显示领域,尤其涉及一种显示面板充电方法以及装置。
背景技术
随着面板行业的发展,大尺寸显示面板在快速发展。来自源极驱动器的数据信号需要通过漫长的传输线到达像素电路对应的栅极驱动电路,受数据线等传输路径上的电阻/电容等影响,数据信号达到不同位置的栅极驱动电路存在延迟。
若显示面板内所有像素的充电时间,都按照标准充电时间(像素在特定灰阶电压下,发光亮度到达特定亮度所需要的充电时间,特定亮度为特定灰阶电压在灰阶电压-发光亮度曲线内对应的亮度),数据信号的延迟将会导致部分像素出现错充的现象。
因此,现有技术存在缺陷,需要改进。
技术问题
本申请提供一种显示面板充电方法以及装置,以解决现有显示面板充电时存在错充的技术问题。
技术解决方案
本申请提供一种显示面板充电方法,其包括:
确定显示面板的测试图案;
在所述显示面板中选择基准像素;
驱动所述显示面板显示所述测试图案;
获取在目标驱动电压下,所述基准像素的发光亮度到达目标亮度所需要的目标充电时间;
根据所述基准像素的目标驱动电压与目标充电时间的对应关系,确定所述显示面板内各像素的驱动电压与充电时间的对应关系;
在需要显示画面时,根据所述显示面板的驱动电压与充电时间的对应关系,对所述显示面板内各像素进行充电。
在本申请的显示面板充电方法中,所述确定显示面板的测试图案的步骤包括:
获取所述显示面板的像素排列方式;
根据所述像素排列方式,确定所述显示面板显示预设图案时,数据线的信号变化图;
选择信号变化图满足要求时对应的预设图案,作为所述测试图案。
在本申请的显示面板充电方法中,所述确定显示面板的测试图案的步骤包括:
驱动所述显示面板显示预设图案;
获取所述显示面板显示预设图案时,数据线的信号变化图;
选择信号变化图满足要求时对应的预设图案,作为所述测试图案。
在本申请的显示面板充电方法中,所述确定显示面板的测试图案的步骤包括:
获取所述显示面板的工艺参数;
查找所述工艺参数对应的预设图案;
将查找到的预设图案,作为所述测试图案。
在本申请的显示面板充电方法中,所述确定显示面板的测试图案的步骤包括:
获取所述显示面板的设备类型;
查找所述设备类型对应的预设图案;
将查找到的预设图案,作为所述测试图案。
在本申请的显示面板充电方法中,所述确定显示面板的测试图案的步骤包括:
将条纹图案,作为所述测试图案,所述条纹图案的条纹方向与所述显示面板的像素排列方向相同。
在本申请的显示面板充电方法中,所述在所述显示面板中选择基准像素的步骤包括:
获取所述显示面板的候选点;
驱动所述显示面板显示所述测试图案,获取在目标驱动电压下,各候选点的发光亮度与充电时间的变化曲线;
根据各候选点的发光亮度与充电时间的变化曲线,从所述候选点中确定所述基准像素。
在本申请的显示面板充电方法中,所述在所述显示面板中选择基准像素的步骤包括:
获取所述显示面板的尺寸和驱动方式;
根据所述尺寸和驱动方式,在所述显示面板所有像素中选择基准像素。
在本申请的显示面板充电方法中,所述获取在目标驱动电压下,所述基准像素的发光亮度到达目标亮度所需要的目标充电时间的步骤包括:
驱动所述显示面板显示所述测试图案,获取在目标驱动电压下,所述基准像素的发光亮度与充电时间的变化曲线;
根据所述基准像素的发光亮度与充电时间的变化曲线,确定所述目标充电时间。
在本申请的显示面板充电方法中,所述根据所述基准像素的发光亮度与充电时间的变化曲线,确定所述目标充电时间的步骤包括:
在所述变化曲线的变化趋势平缓时,选择平缓区中间位置对应的充电时间,作为所述目标充电时间;
否则,选择所述变化曲线中最大发生亮度对应的充电时间,作为所述目标充电时间。
本申请提供一种显示面板充电装置,其包括:
图案选择模块,用于确定显示面板的测试图案;
像素选择模块,用于在所述显示面板中选择基准像素;
图案驱动模块,用于驱动所述显示面板显示所述测试图案;
时间获取模块,用于获取在目标驱动电压下,所述基准像素的发光亮度到达目标亮度所需要的目标充电时间;
时间确定模块,用于根据所述基准像素的目标驱动电压与目标充电时间的对应关系,确定所述显示面板的驱动电压与充电时间的对应关系;
像素充电模块,用于在需要显示画面时,根据所述显示面板的驱动电压与充电时间的对应关系,对所述显示面板内各像素进行充电。
在本申请的显示面板充电装置中,所述图案选择模块用于:获取所述显示面板的像素排列方式;根据所述像素排列方式,确定所述显示面板显示预设图案时,数据线的信号变化图;选择信号变化图满足要求时对应的预设图案,作为所述测试图案。
在本申请的显示面板充电装置中,所述图案选择模块用于:驱动所述显示面板显示预设图案;获取所述显示面板显示预设图案时,数据线的信号变化图;选择信号变化图满足要求时对应的预设图案,作为所述测试图案。
在本申请的显示面板充电装置中,所述图案选择模块用于:获取所述显示面板的工艺参数;查找所述工艺参数对应的预设图案;将查找到的预设图案,作为所述测试图案。
在本申请的显示面板充电装置中,所述图案选择模块用于:获取所述显示面板的设备类型;查找所述设备类型对应的预设图案;将查找到的预设图案,作为所述测试图案。
在本申请的显示面板充电装置中,所述图案选择模块用于:将条纹图案,作为所述测试图案,所述条纹图案的条纹方向与所述显示面板的像素排列方向相同。
在本申请的显示面板充电装置中,所述像素选择模块用于:获取所述显示面板的候选点;驱动所述显示面板显示所述测试图案,获取在目标驱动电压下,各候选点的发光亮度与充电时间的变化曲线;根据各候选点的发光亮度与充电时间的变化曲线,从所述候选点中确定所述基准像素。
在本申请的显示面板充电装置中,所述像素选择模块用于:获取所述显示面板的尺寸和驱动方式;根据所述尺寸和驱动方式,在所述显示面板所有像素中选择基准像素。
在本申请的显示面板充电装置中,所述时间获取模块用于:驱动所述显示面板显示所述测试图案,获取在目标驱动电压下,所述基准像素的发光亮度与充电时间的变化曲线;根据所述基准像素的发光亮度与充电时间的变化曲线,确定所述目标充电时间。
在本申请的显示面板充电装置中,所述时间获取模块用于:在所述变化曲线的变化趋势平缓时,选择平缓区中间位置对应的充电时间,作为所述目标充电时间;否则,选择所述变化曲线中最大发生亮度对应的充电时间,作为所述目标充电时间。
有益效果
本申请提供一种显示面板充电方法以及装置,该方法包括,驱动显示面板显示测试图案,获取在目标驱动电压下,基准像素的发光亮度到达目标亮度所需要的目标充电时间,根据基准像素的目标驱动电压与目标充电时间的对应关系,进而确定所述显示面板内各像素的驱动电压与充电时间的对应关系,在需要显示画面时,根据显示面板的驱动电压与充电时间的对应关系,对所述显示面板内各像素进行充电;即本申请在进行充电时是根据基准像素,如显示面板中最容易出现错充的像素的充电时间对显示面板进行充电的,并非是按照标准充电时间进行充电,这样就可以克服数据信号的延迟所导致的部分像素出现错充的现象,解决了现有显示面板充电时存在错充的技术问题。
附图说明
为了更清楚地说明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单介绍,显而易见地,下面描述中的附图仅仅是发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的显示面板充电方法的流程图;
图2为本申请实施例提供的显示面板充电装置的结构示意图;
图3为本申请实施例提供的显示面板的示意图;
图4为本申请实施例提供的像素排列示意图;
图5为本申请实施例提供的数据线的信号变化图;
图6为本申请实施例提供的候选点的发光强度-充电时间的变化曲线;
图7为本申请实施例提供的基准像素的发光强度-充电时间的变化曲线。
本发明的实施方式
以下各实施例的说明是参考附加的图示,用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语,例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等,仅是参考附加图式的方向。因此,使用的方向用语是用以说明及理解本申请,而非用以限制本申请。在图中,结构相似的单元是用以相同标号表示。
针对现有技术中显示面板充电时存在错充的技术问题,本申请实施例能够解决这个问题。
在一种实施例中,如图1所示,本申请提供的显示面板充电方法包括:
S101、确定显示面板的测试图案;
S102、在所述显示面板中选择基准像素;
S103、驱动所述显示面板显示所述测试图案;
S104、获取在目标驱动电压下,所述基准像素的发光亮度到达目标亮度所需要的目标充电时间;
S105、根据所述基准像素的目标驱动电压与目标充电时间的对应关系,确定所述显示面板内各像素的驱动电压与充电时间的对应关系;
S106、在需要显示画面时,根据所述显示面板的驱动电压与充电时间的对应关系,对所述显示面板内各像素进行充电。
本实施例提供一种显示面板充电方法,该方法包括,驱动显示面板显示测试图案,获取在目标驱动电压下,基准像素的发光亮度到达目标亮度所需要的目标充电时间,根据基准像素的目标驱动电压与目标充电时间的对应关系,进而确定所述显示面板内各像素的驱动电压与充电时间的对应关系,在需要显示画面时,根据显示面板的驱动电压与充电时间的对应关系,对所述显示面板内各像素进行充电;即本申请在进行充电时是根据基准像素,如显示面板中最容易出现错充的像素的充电时间对显示面板进行充电的,并非是按照标准充电时间进行充电,这样就可以克服数据信号的延迟所导致的部分像素出现错充的现象,解决了现有显示面板充电时存在错充的技术问题
不同显示面板的像素排列方式不同,而不同像素排列方式则对应不同的最佳测试图案,因此,在一种实施例中,所述确定显示面板的测试图案的步骤包括:
获取所述显示面板的像素排列方式;像素排列方式可以是各种各样的,如图4所示的Flip pixel 架构等;
根据所述像素排列方式,确定所述显示面板显示预设图案时,数据线的信号变化图,如图5所示;
选择信号变化图满足要求时对应的预设图案,作为所述测试图案。
不同的像素排列方式,在相同的预设图案时,数据线的信号变化图不同,且可以推定,因此本实施例不需要驱动显示面板显示预设图案即可确定测试图案。
在一种实施例中,信号变化图满足要求时对应的预设图案是指每一条数据线的信号在每一帧都发生变换。
不同显示面板对应不同的最佳测试图案,因此,在一种实施例中,所述确定显示面板的测试图案的步骤包括:
驱动所述显示面板显示预设图案;
获取所述显示面板显示预设图案时,数据线的信号变化图;
选择信号变化图满足要求时对应的预设图案,作为所述测试图案。
本实施例不考虑显示面板的像素排列方式,直接驱动显示面板显示预设图案,然后获取数据线的信号变化图,进而选择信号变化图满足要求时对应的预设图案,作为所述测试图案。
不同工艺得到的显示面板对应不同的最佳测试图案,因此,可以预先建立工艺参数与测试图案的映射关系,并进行查找。在一种实施例中,所述确定显示面板的测试图案的步骤包括:
获取所述显示面板的工艺参数;
查找所述工艺参数对应的预设图案;
将查找到的预设图案,作为所述测试图案。
本实施例根据显示面板的工艺参数查找测试图案,方案实现简单。
不同类型的显示面板对应不同的最佳测试图案,因此,可以预先建立设备类型与测试图案的映射关系,并进行查找。在一种实施例中,所述确定显示面板的测试图案的步骤包括:
获取所述显示面板的设备类型;
查找所述设备类型对应的预设图案;
将查找到的预设图案,作为所述测试图案。
本实施例根据显示面板的设备类型查找测试图案,方案实现简单。
显示面板的像素一般为行或者列设置,那么对应的最佳测试图案就是条纹图案,不同列或者不同行显示不同颜色的条纹,因此,在一种实施例中,所述确定显示面板的测试图案的步骤包括:
将条纹图案,作为所述测试图案,所述条纹图案的条纹方向与所述显示面板的像素排列方向相同。
本实施例直接将条纹图案作为测试图案,方案实现简单。
基准像素为显示面板中最容易出现错充的像素,这个像素可以根据发光曲线确定得到,因此,在一种实施例中,所述在所述显示面板中选择基准像素的步骤包括:
获取所述显示面板的候选点,候选点是指显示面板中容易出现错误的像素位置,一般如图3所示的9个位置;
驱动所述显示面板显示所述测试图案,获取在目标驱动电压下,各候选点的发光亮度与充电时间的变化曲线,如图6所示;
根据各候选点的发光亮度与充电时间的变化曲线,从所述候选点中确定所述基准像素。
容易出现错充的像素,其对应的变化曲线发光亮度的变化范围比较大,因此根据变化曲线可以确定一个或者多个基准像素。
基准像素为显示面板中最容易出现错充的像素,这个像素的位置在显示面板内一般是固定的,因此,在一种实施例中,所述在所述显示面板中选择基准像素的步骤包括:
获取所述显示面板的尺寸和驱动方式;
根据所述尺寸和驱动方式,在所述显示面板所有像素中选择基准像素。
尺寸是指显示面板的大小,例如65寸或者75寸等,驱动方式包括单源极驱动方式和双源极驱动方式,都影响数据信号的传输路径,以如图5所示的65寸、单源极驱动方式的显示面板中,直接将B处的像素作为基准像素。
在同一个驱动电压下,像素发光强度与充电时间的变化曲线近似外凸的曲线,因此可以根据这个曲线确定最佳的充电时间作为目标充电时间,即可以达到最大亮度,又可以节省时间,即在一种实施例中,所述获取在目标驱动电压下,所述基准像素的发光亮度到达目标亮度所需要的目标充电时间的步骤包括:
驱动所述显示面板显示所述测试图案,获取在目标驱动电压下,所述基准像素的发光亮度与充电时间的变化曲线;
根据所述基准像素的发光亮度与充电时间的变化曲线,确定所述目标充电时间。
在一种实施例中,所述根据所述基准像素的发光亮度与充电时间的变化曲线,确定所述目标充电时间的步骤包括:
在所述变化曲线的变化趋势平缓时,选择平缓区中间位置对应的充电时间,作为所述目标充电时间,如图7中(1)所示;
否则,选择所述变化曲线中最大发生亮度对应的充电时间,作为所述目标充电时间,如图7中(2)所示。
在一种实施例中,如图2所示,本申请提供的显示面板充电装置包括:
图案选择模块21,用于确定显示面板的测试图案;
像素选择模块22,用于在所述显示面板中选择基准像素;
图案驱动模块23,用于驱动所述显示面板显示所述测试图案;
时间获取模块24,用于获取在目标驱动电压下,所述基准像素的发光亮度到达目标亮度所需要的目标充电时间;
时间确定模块25,用于根据所述基准像素的目标驱动电压与目标充电时间的对应关系,确定所述显示面板的驱动电压与充电时间的对应关系;
像素充电模块26,用于在需要显示画面时,根据所述显示面板的驱动电压与充电时间的对应关系,对所述显示面板内各像素进行充电。
本实施例提供了一种显示面板充电装置,通过驱动显示面板显示测试图案,获取在目标驱动电压下,基准像素的发光亮度到达目标亮度所需要的目标充电时间,根据基准像素的目标驱动电压与目标充电时间的对应关系,进而确定所述显示面板内各像素的驱动电压与充电时间的对应关系,在需要显示画面时,根据显示面板的驱动电压与充电时间的对应关系,对所述显示面板内各像素进行充电;即本申请在进行充电时是根据基准像素,如显示面板中最容易出现错充的像素的充电时间对显示面板进行充电的,并非是按照标准充电时间进行充电,这样就可以克服数据信号的延迟所导致的部分像素出现错充的现象,解决了现有显示面板充电时存在错充的技术问题。
在一种实施例中,所述图案选择模块21用于:获取所述显示面板的像素排列方式;根据所述像素排列方式,确定所述显示面板显示预设图案时,数据线的信号变化图;选择信号变化图满足要求时对应的预设图案,作为所述测试图案。
在一种实施例中,所述图案选择模块21用于:驱动所述显示面板显示预设图案;获取所述显示面板显示预设图案时,数据线的信号变化图;选择信号变化图满足要求时对应的预设图案,作为所述测试图案。
在一种实施例中,所述图案选择模块21用于:获取所述显示面板的工艺参数;查找所述工艺参数对应的预设图案;将查找到的预设图案,作为所述测试图案。
在一种实施例中,所述图案选择模块21用于:获取所述显示面板的设备类型;查找所述设备类型对应的预设图案;将查找到的预设图案,作为所述测试图案。
在一种实施例中,所述图案选择模块21用于:将条纹图案,作为所述测试图案,所述条纹图案的条纹方向与所述显示面板的像素排列方向相同。
在一种实施例中,所述像素选择模块22用于:获取所述显示面板的候选点;驱动所述显示面板显示所述测试图案,获取在目标驱动电压下,各候选点的发光亮度与充电时间的变化曲线;根据各候选点的发光亮度与充电时间的变化曲线,从所述候选点中确定所述基准像素。
在一种实施例中,所述像素选择模块22用于:获取所述显示面板的尺寸和驱动方式;根据所述尺寸和驱动方式,在所述显示面板所有像素中选择基准像素。
在一种实施例中,所述时间获取模块24用于:驱动所述显示面板显示所述测试图案,获取在目标驱动电压下,所述基准像素的发光亮度与充电时间的变化曲线;根据所述基准像素的发光亮度与充电时间的变化曲线,确定所述目标充电时间。
在一种实施例中,所述时间获取模块24用于:在所述变化曲线的变化趋势平缓时,选择平缓区中间位置对应的充电时间,作为所述目标充电时间;否则,选择所述变化曲线中最大发生亮度对应的充电时间,作为所述目标充电时间。
现结合具体实施例对本申请进一步的诠释说明。
随着面板行业的发展,GOA相关技术已经成为LCD产品的标配,其不仅能够降低产品的成本,而且能够减少模组工序,实现窄边框设计等。相比较于传统的COF产品,GOA的信号从Source侧IC输出,必须要经过GOA Busline 10进行传输,由于GOA Busline 10的RC Dealy问题导致Source对侧与Source侧信号GOA相关信号输入存在一定的差异,这种差异可直接影响Gate波形输出,因此,在实际确认充电时,对于整个面板来讲,充电时间的位置选取要综合考虑 Gate_line 、Data_line、GOA Busline 10的RC Delay状况,而充电时间的选取基于错充,如图3所示,对于面板上的九个点位(即上文中的候选点1至候选点9),应选择最易发生错充的点位(即上文中的基准像素)作为整个面板充电时间选取的位置。
除上述确认充电时间的位置外,确认充电时间的图案Pattern(即上文中的测试图案)同样重要,该Patten应能够体现出充电时间的不同造成的充电差异,反映在面板上,即为亮度的差异。综合以上条件,充电时间的确认应首先选择一种合适的Pattern,然后以面板最易发生错充的点位为基准,调节不同的充电时间,选取亮度最大时对应的充电时间为整个面板的最佳充电时间。
基于以上信息及要求,本实施例提出一种实际面板确认充电时间的方法,其包括以下步骤:
确认充电时间应选取合适的Pattern。
该Patten应能够体现出充电时间的不同造成的充电差异,例如,在如图4所示的Flip pixel 架构下,该Pattern的每一条数据线Data Line(数据线1至数据线3)每一帧都发生变换,与面板设计时模拟相对应。
现有的预设图案包括条纹图案H-stripe Pattern和绿色纯图案G Pattern,当显示面板显示条纹图案H-stripe Pattern时,数据线的信号变化图如图5中(a)所示,当显示面板显示绿色纯图案G Pattern时,数据线的信号变化图如图5中(b)所示。由图5可知,显示面板显示绿色纯图案G Pattern时,并非每一条Data Line都会在每一帧发生变化,因此,H-Stripe Pattern 作为充电时间的确认Pattern更准确。
Pattern 确认后,应选择面板九点最易发生错充的位置来作为基准位置,如图6所示,测量面板九点不同的位置在H-stripe Pattern下,亮度随着充电时间的变化曲线,因为候选点2对应的变化曲线的发光亮度变化范围最大,面板最易发生错充的位置为Source 对侧中间点位,即候选点2对应的像素。在图6中,横轴t为实际充电时间,纵轴CR%为亮度与基准亮度的比值,基准亮度为对应的灰阶电压在灰阶电压-发光亮度曲线内对应的亮度。
在此基础上,选择H-stripe Pattern,在该Pattern下,以Source对侧中间点位为基准像素,量测其在不同驱动电压下,不同充电时间的亮度的变化,得到变化曲线,如图7所示。如图7中(1)所示,当变化曲线的变化明显时,选取亮度最高点为充电时间的选取点T,如图7中(2)所示,当曲线较平缓时,选取平缓区的中间点为充电时间的选取点T,以保证TFT 器件受到光热Stress时I-V shift时该点位仍能满足要求。
根据上述实施例可知:
本申请实施例提供一种显示面板充电方法以及装置,该方法包括,驱动显示面板显示测试图案,获取在目标驱动电压下,基准像素的发光亮度到达目标亮度所需要的目标充电时间,根据基准像素的目标驱动电压与目标充电时间的对应关系,进而确定所述显示面板内各像素的驱动电压与充电时间的对应关系,在需要显示画面时,根据显示面板的驱动电压与充电时间的对应关系,对所述显示面板内各像素进行充电;即本申请在进行充电时是根据基准像素,如显示面板中最容易出现错充的像素的充电时间对显示面板进行充电的,并非是按照标准充电时间进行充电,这样就可以克服数据信号的延迟所导致的部分像素出现错充的现象,解决了现有显示面板充电时存在错充的技术问题。
综上所述,虽然本申请已以优选实施例揭露如上,但上述优选实施例并非用以限制本申请,本领域的普通技术人员,在不脱离本申请的精神和范围内,均可作各种更动与润饰,因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种显示面板充电方法,其中,包括:
    确定显示面板的测试图案;
    在所述显示面板中选择基准像素;
    驱动所述显示面板显示所述测试图案;
    获取在目标驱动电压下,所述基准像素的发光亮度到达目标亮度所需要的目标充电时间;
    根据所述基准像素的目标驱动电压与目标充电时间的对应关系,确定所述显示面板内各像素的驱动电压与充电时间的对应关系;
    在需要显示画面时,根据所述显示面板的驱动电压与充电时间的对应关系,对所述显示面板内各像素进行充电。
  2. 如权利要求1所述的显示面板充电方法,其中,所述确定显示面板的测试图案的步骤包括:
    获取所述显示面板的像素排列方式;
    根据所述像素排列方式,确定所述显示面板显示预设图案时,数据线的信号变化图;
    选择信号变化图满足要求时对应的预设图案,作为所述测试图案。
  3. 如权利要求1所述的显示面板充电方法,其中,所述确定显示面板的测试图案的步骤包括:
    驱动所述显示面板显示预设图案;
    获取所述显示面板显示预设图案时,数据线的信号变化图;
    选择信号变化图满足要求时对应的预设图案,作为所述测试图案。
  4. 如权利要求1所述的显示面板充电方法,其中,所述确定显示面板的测试图案的步骤包括:
    获取所述显示面板的工艺参数;
    查找所述工艺参数对应的预设图案;
    将查找到的预设图案,作为所述测试图案。
  5. 如权利要求1所述的显示面板充电方法,其中,所述确定显示面板的测试图案的步骤包括:
    获取所述显示面板的设备类型;
    查找所述设备类型对应的预设图案;
    将查找到的预设图案,作为所述测试图案。
  6. 如权利要求1所述的显示面板充电方法,其中,所述确定显示面板的测试图案的步骤包括:
    将条纹图案,作为所述测试图案,所述条纹图案的条纹方向与所述显示面板的像素排列方向相同。
  7. 如权利要求1所述的显示面板充电方法,其中,所述在所述显示面板中选择基准像素的步骤包括:
    获取所述显示面板的候选点;
    驱动所述显示面板显示所述测试图案,获取在目标驱动电压下,各候选点的发光亮度与充电时间的变化曲线;
    根据各候选点的发光亮度与充电时间的变化曲线,从所述候选点中确定所述基准像素。
  8. 如权利要求1所述的显示面板充电方法,其中,所述在所述显示面板中选择基准像素的步骤包括:
    获取所述显示面板的尺寸和驱动方式;
    根据所述尺寸和驱动方式,在所述显示面板所有像素中选择基准像素。
  9. 如权利要求1所述的显示面板充电方法,其中,所述获取在目标驱动电压下,所述基准像素的发光亮度到达目标亮度所需要的目标充电时间的步骤包括:
    驱动所述显示面板显示所述测试图案,获取在目标驱动电压下,所述基准像素的发光亮度与充电时间的变化曲线;
    根据所述基准像素的发光亮度与充电时间的变化曲线,确定所述目标充电时间。
  10. 如权利要求9所述的显示面板充电方法,其中,所述根据所述基准像素的发光亮度与充电时间的变化曲线,确定所述目标充电时间的步骤包括:
    在所述变化曲线的变化趋势平缓时,选择平缓区中间位置对应的充电时间,作为所述目标充电时间;
    否则,选择所述变化曲线中最大发生亮度对应的充电时间,作为所述目标充电时间。
  11. 一种显示面板充电装置,其中,包括:
    图案选择模块,用于确定显示面板的测试图案;
    像素选择模块,用于在所述显示面板中选择基准像素;
    图案驱动模块,用于驱动所述显示面板显示所述测试图案;
    时间获取模块,用于获取在目标驱动电压下,所述基准像素的发光亮度到达目标亮度所需要的目标充电时间;
    时间确定模块,用于根据所述基准像素的目标驱动电压与目标充电时间的对应关系,确定所述显示面板的驱动电压与充电时间的对应关系;
    像素充电模块,用于在需要显示画面时,根据所述显示面板的驱动电压与充电时间的对应关系,对所述显示面板内各像素进行充电。
  12. 如权利要求11所述的显示面板充电装置,其中,所述图案选择模块用于:获取所述显示面板的像素排列方式;根据所述像素排列方式,确定所述显示面板显示预设图案时,数据线的信号变化图;选择信号变化图满足要求时对应的预设图案,作为所述测试图案。
  13. 如权利要求11所述的显示面板充电装置,其中,所述图案选择模块用于:驱动所述显示面板显示预设图案;获取所述显示面板显示预设图案时,数据线的信号变化图;选择信号变化图满足要求时对应的预设图案,作为所述测试图案。
  14. 如权利要求11所述的显示面板充电装置,其中,所述图案选择模块用于:获取所述显示面板的工艺参数;查找所述工艺参数对应的预设图案;将查找到的预设图案,作为所述测试图案。
  15. 如权利要求11所述的显示面板充电装置,其中,所述图案选择模块用于:获取所述显示面板的设备类型;查找所述设备类型对应的预设图案;将查找到的预设图案,作为所述测试图案。
  16. 如权利要求11所述的显示面板充电装置,其中,所述图案选择模块用于:将条纹图案,作为所述测试图案,所述条纹图案的条纹方向与所述显示面板的像素排列方向相同。
  17. 如权利要求11所述的显示面板充电装置,其中,所述像素选择模块用于:获取所述显示面板的候选点;驱动所述显示面板显示所述测试图案,获取在目标驱动电压下,各候选点的发光亮度与充电时间的变化曲线;根据各候选点的发光亮度与充电时间的变化曲线,从所述候选点中确定所述基准像素。
  18. 如权利要求11所述的显示面板充电装置,其中,所述像素选择模块用于:获取所述显示面板的尺寸和驱动方式;根据所述尺寸和驱动方式,在所述显示面板所有像素中选择基准像素。
  19. 如权利要求11所述的显示面板充电装置,其中,所述时间获取模块用于:驱动所述显示面板显示所述测试图案,获取在目标驱动电压下,所述基准像素的发光亮度与充电时间的变化曲线;根据所述基准像素的发光亮度与充电时间的变化曲线,确定所述目标充电时间。
  20. 如权利要求19所述的显示面板充电装置,其中,所述时间获取模块用于:在所述变化曲线的变化趋势平缓时,选择平缓区中间位置对应的充电时间,作为所述目标充电时间;否则,选择所述变化曲线中最大发生亮度对应的充电时间,作为所述目标充电时间。
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