CN114283729A - Display panel, brightness deviation compensation method thereof and display device - Google Patents
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Abstract
The application provides a display panel and a brightness deviation compensation method and a display device thereof, the brightness deviation compensation data used for brightness deviation compensation is stored through a storage unit of a driving chip, a time schedule controller can directly read the brightness deviation compensation data through an original communication interface of the driving chip to perform brightness deviation compensation, a flash is not required to be independently arranged in a source driving board, a serial peripheral interface is not required to be arranged to perform data reading, hardware cost is saved, device layout and wiring of the source driving board are simplified, data reading efficiency and signal transmission quality are improved, and the problems that when the brightness deviation compensation is performed on the existing display panel, hardware cost is high, the source driving board is complex in device layout, and the signal transmission quality is influenced are effectively solved.
Description
Technical Field
The embodiment of the application belongs to the technical field of display, and particularly relates to a display panel, a brightness deviation compensation method of the display panel and a display device.
Background
The brightness uniformity of the display device is one of the important indicators for measuring the display effect of the display device. However, the display device has a phenomenon that the display panel has an uneven brightness distribution when used due to the non-uniformity of the manufacturing process or the non-uniformity of the material characteristics during the manufacturing process, which affects the display effect, and the phenomenon is called a color unevenness phenomenon (mura phenomenon).
A technique of improving the mura phenomenon of the display device by an algorithm is called a brightness deviation compensation (demura) technique. However, since the mura conditions of different display panels are different, the compensation data required for the luminance deviation compensation is also different. Therefore, when demura is performed on a display panel, it is necessary to store compensation data corresponding to the display panel in a flash memory (flash) additionally provided in a source driver board (X-board) connected to the display panel, and then read the compensation data stored in the flash memory through a Timing Controller (TCON) and a communication signal pin (SPI signal) of the flash memory to perform brightness deviation compensation on the display panel.
And the independent setting of the flash not only increases the hardware cost, but also influences the layout of devices in the source driving board, so that the wiring is complicated, and the quality of signal transmission is influenced.
Content of application
The embodiment of the application provides a display panel, a brightness deviation compensation method thereof and a display device, and aims to solve the problems that when the brightness deviation compensation is carried out on the conventional display panel, the hardware cost is high, the layout of source driving board devices is complex, and the signal transmission quality is influenced.
One embodiment of the present application provides a display panel, wherein a plurality of driving chips are arranged in the display panel, one ends of the driving chips are connected with the display panel, the other ends of the driving chips are connected with a source driving board, and the source driving board is connected with a time schedule controller;
the timing controller performs brightness deviation compensation on the display panel by reading the brightness deviation compensation data stored in the memory cell of the driving chip.
In one embodiment, the driving chip includes a memory cell; the communication mainboard is connected with the storage unit; a logic control unit; the shift register unit is connected with the logic control unit; a memory connected to the logic control unit; the digital-to-analog converter is connected with the memory, and the output buffer is connected with the digital-to-analog converter;
the driving chip is connected with the time sequence controller through a communication interface provided by the communication mainboard.
In one embodiment, the display panel comprises a plurality of display areas, and each display area is controlled and driven by a corresponding driving chip; accordingly, the timing controller performs luminance deviation compensation on the display panel by reading the luminance deviation compensation data stored in the memory cell of the driving chip, including:
and reading the brightness deviation compensation data from the storage unit of the driving chip, and performing brightness deviation compensation on the pixel points in the corresponding display area according to the brightness deviation compensation data.
In one embodiment, the driving chip is a source driving chip.
In one embodiment, the source driver chip is a flip-chip thin film type source driver chip.
A second aspect of the embodiments of the present application provides a brightness deviation compensation method applied to the display panel of the first aspect, where the brightness deviation compensation method includes:
reading the brightness deviation compensation data stored in the memory cell of the driver chip;
and performing brightness deviation compensation on the display panel according to the read brightness deviation compensation data.
In one embodiment, the reading of the luminance deviation compensation data stored in the memory cell of the driving chip includes:
reading the brightness deviation compensation data stored in the storage unit of the driving chip through a communication interface provided by a communication mainboard of the driving chip;
the performing brightness deviation compensation on the display panel according to the read brightness deviation compensation data includes:
the time sequence controller determines pixel data output to the source electrode driving chip according to the pixel data of the picture to be displayed and the read brightness deviation compensation data;
the logic control unit of the source driving chip controls the shift register of the source driving chip to receive one pixel data output by the timing controller when the rising edge of the sampling clock arrives;
when all pixel data in a row are read, the shift register of the source driving chip outputs pulses and simultaneously moves all the pixel data in the row to the memory of the source driving chip;
the digital-to-analog converter of the source driving chip converts the pixel data moved into the memory of the source driving chip into corresponding gray voltages;
the output buffer of the source driving chip outputs the gray scale voltage converted by the digital-to-analog converter of the source driving chip to the corresponding pixel point in the display panel, thereby realizing display driving and brightness deviation compensation.
In one embodiment, the performing brightness deviation compensation on the display panel according to the read brightness deviation compensation data includes:
determining a blocking strategy of brightness deviation compensation data according to a display area controlled and driven by a source driving chip;
partitioning the brightness deviation compensation data according to the partitioning strategy to obtain partitioned data;
and storing the block data of the brightness deviation compensation data in the storage unit of the corresponding source driving chip.
In one embodiment, the reading of the luminance deviation compensation data stored in the memory cell of the driving chip includes:
reading brightness deviation compensation data of a target pixel point from the storage unit when the time sequence controller drives a target area;
correspondingly, the performing brightness deviation compensation on the display panel according to the read brightness deviation compensation data includes:
and performing brightness deviation compensation on the target pixel point according to the brightness deviation compensation data of the target pixel point.
A third aspect of the embodiments of the present application further provides a display device, including:
the display panel according to the first aspect;
a backlight module; the backlight module is arranged at the back of the display panel;
a light shielding member; and the frame is arranged around the edge of the display panel to form the frame of the display panel.
The display panel and the brightness deviation compensation method and the display device thereof provided by the embodiment of the application store the brightness deviation compensation data for brightness deviation compensation through the storage unit of the driving chip, the time schedule controller can directly read the brightness deviation compensation data through the original communication interface of the driving chip to perform the brightness deviation compensation, a flash is not required to be independently arranged in the source driving board, and a serial peripheral interface is not required to be arranged to perform data reading, so that the hardware cost is saved, the device layout and wiring of the source driving board are simplified, the data reading efficiency and the signal transmission quality are improved, and the problems that the hardware cost is high, the device layout of the source driving board is complicated and the signal transmission quality is influenced when the brightness deviation compensation is performed by the conventional display panel are effectively solved.
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In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application;
fig. 2 is a schematic frame diagram of a driving chip provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of a driving scheme for partitioning a display panel according to an embodiment of the present disclosure;
fig. 4 is a schematic flow chart illustrating an implementation of a luminance deviation compensation method according to an embodiment of the present application;
fig. 5 is a schematic flow chart illustrating an implementation of a luminance deviation compensation method according to another embodiment of the present application;
fig. 6 is a schematic diagram illustrating a specific implementation flow of S103 in the brightness deviation compensation method according to an embodiment of the present application;
fig. 7 is a schematic flow chart illustrating an implementation of a luminance deviation compensation method according to another embodiment of the present application;
fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application and the drawings described above, are intended to cover non-exclusive inclusions. For example, a process, method, or system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure. As shown in fig. 1, a plurality of driving chips 11 are disposed in a display panel 10 according to an embodiment of the present invention, one end of each driving chip 11 is connected to the display panel 10, the other end of each driving chip 11 is connected to a source driving Board 12, and the source driving Board (X-Board)12 is connected to a timing controller 13.
The Timing Controller (TCON)13 performs the luminance deviation compensation on the display panel 10 by reading the luminance deviation compensation data stored in the memory unit 111(memory) of the driving chip 11.
In the embodiment of the present application, luminance deviation compensation data (demura code) for luminance deviation compensation is stored in the storage unit 111 of the driving chip 11, and then the luminance deviation compensation data is directly read from the storage unit 111 of the driving chip 11 through the timing controller 13, and luminance deviation compensation is performed on the display panel, and it is not necessary to separately set a flash in the source driving board 12 to store the luminance deviation compensation data, so that hardware cost is effectively reduced, device layout and wiring of the source driving board 12 are simplified, and signal transmission quality is improved. Moreover, the timing controller 13 can directly read the luminance deviation compensation data only through the original communication Interface and protocol (for example, a P to P Interface or a mini-LVDS Interface) with the driving chip 11, and does not need to set a Serial Peripheral Interface (SPI) to input an SPI signal to realize data reading, so that the efficiency of data reading can be improved, and the realization cost is reduced.
In an embodiment of the present invention, the display panel 10 includes an Active Area (AA) and a non-Active Area, the plurality of driving chips 11 are disposed in the non-Active Area, the source driving board 12 and the timing controller 13 are also disposed in the non-Active Area, and the source driving board 12 and the timing controller 13 are connected by a Flexible Flat Cable (FFC) 14.
In an embodiment of the present invention, the driving chip 11 is a source driver IC (source driver IC).
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a frame of a driving chip 11 according to an embodiment of the present disclosure. As shown in fig. 2, the driving chip 11 includes a storage unit 111, a communication board 112, a logic control unit 113, a shift register 114, a buffer 115, a digital-to-analog converter 116, and an output buffer 117.
The storage unit 111 is in communication connection with the communication motherboard 112, and the communication motherboard 112 provides a P to P interface so that the timing controller can perform P to P data reading with the driving information, thereby reading the brightness deviation compensation data stored in the storage unit 111 from the storage unit 111.
In the practical application process, the data reading rate of directly reading data through the P to P data interface can reach dozens of Mbps to hundreds of Mbps, the data reading rate is dozens of times of the data reading rate of reading data through the SPI interface, and the data reading efficiency can be greatly improved.
It is understood that the communication motherboard 112 may also provide other types of communication interfaces to read data from the timing controller, such as mini-LVDS interface.
The logic control unit 113 is connected to the shift register 114, the logic control unit 113 can control the shift register 114 to receive one pixel data output from the timing controller when a rising edge of a sampling clock arrives, the memory 115 is connected to the shift controller 114, when all pixel data in one line is read, a pulse is output to simultaneously transfer all the data to the memory 115, the memory 115 is connected to the digital-analog converter 116, the digital-analog converter 116 converts the pixel data in the memory 115 into a corresponding gray voltage, the digital-analog converter 116 is connected to the output buffer 117, and the output buffer outputs the gray voltage converted by the digital-analog converter 116 to a corresponding pixel point to realize driving.
In the embodiment of the present application, the pixel data output by the timing controller is the pixel data after the luminance deviation compensation data, and the timing controller determines which pixels need to be subjected to the luminance deviation compensation in the pixels correspondingly driven by the driving chip after reading the luminance deviation compensation data stored in the storage unit of the driving chip, and when the pixel data is output according to the display picture requirement, the output pixel data is further compensated according to the luminance deviation compensation data, so as to obtain the pixel data after the luminance deviation compensation.
In another embodiment of the present application, it may be determined whether a pixel point driven by the timing controller is a target pixel point according to a position coordinate of a target pixel point which is pre-stored in the storage unit and needs to be subjected to luminance deviation compensation, and the luminance deviation compensation data of the target pixel point is read from the storage unit only when the timing controller drives the target pixel point, and then the output pixel data is compensated according to the luminance deviation compensation data, so as to obtain the pixel data of the target pixel point after the luminance deviation compensation. Therefore, the time schedule controller can read and compensate the data only when the brightness deviation compensation is carried out on the target pixel point, the time consumption of data reading can be reduced, and the brightness compensation efficiency is improved.
The source driver Chip is a Chip On Film (COF) type source driver Chip.
In an embodiment of the present application, the luminance deviation compensation data stored in the driving chip 11 is luminance deviation compensation data corresponding to a pixel point driven by the driving chip 11.
In a specific implementation, after the brightness deviation compensation data of the display panel is obtained, the brightness deviation compensation data of the display panel can be stored in the storage unit of the source driver chip of the flip-chip thin film type in blocks.
In an embodiment of the present application, the display panel includes a plurality of display regions, each of the display regions is controlled and driven by a corresponding driving chip, and the timing controller performs luminance deviation compensation on the display panel by reading luminance deviation compensation data stored in a storage unit of the driving chip, including:
and reading the brightness deviation compensation data from the storage unit of the driving chip, and performing brightness deviation compensation on the pixel points in the corresponding display area according to the brightness deviation compensation data.
In the specific implementation, one source driver chip is only responsible for driving the pixel points in a certain area of the display panel, and the pixel points in different areas are driven by different source driver chips, so that after the luminance deviation compensation data of the display panel are obtained, the blocking strategy of the luminance deviation compensation data can be determined according to the area of the display panel driven by the source driver chip, then the luminance deviation compensation data are blocked based on the blocking strategy, and the blocked luminance deviation compensation data are respectively stored in the storage units of the corresponding source driver chips.
In a specific application, after the timing controller reads the brightness deviation compensation data stored in the source driving chip through the communication interface with the source driving chip, the brightness deviation compensation can be performed on the pixel points in the display panel area which is driven by the source driving chip according to the brightness deviation compensation data.
For example, referring to fig. 3, fig. 3 is a schematic diagram illustrating a partition driving of a display panel according to an embodiment of the present disclosure. As shown in fig. 3, the display panel 10 may be divided into N display regions, i.e., a first display region 101 and a second display region 102, wherein N is a positive integer greater than 1. Each display area comprises a plurality of pixel points which are arranged in an array. Correspondingly, the N display regions are respectively controlled and driven by corresponding source driver chips, that is, the number of the source driver chips connected to the display panel 10 is also N, where a first source driver chip 11A controls and drives the first display region 101, a second source driver chip 11B controls and drives the second display region 102, a third source driver chip 11C controls and drives the third display region 103, and so on.
When the brightness deviation compensation data of the display panel is determined, the brightness deviation compensation data corresponding to the partition needs to be stored in the storage unit controlling the source driving chip driving the partition, so that when the timing controller reads the brightness deviation compensation data, the brightness deviation compensation data corresponding to the partition can be read from the source driving chip driving a certain partition, and then the brightness deviation compensation is performed on the partition based on the read brightness deviation compensation data. For example, when the timing controller reads the luminance deviation compensation data stored in the storage unit of the first source driving chip 11A, the luminance deviation compensation value of the pixel in the first display region 101 is determined according to the read luminance deviation compensation data, and then the pixel in the first display region 101 is correspondingly compensated according to the luminance deviation compensation value of the pixel in the first display region 101.
In a specific application, the brightness deviation compensation data of the display panel can be determined by testing the brightness of the display panel.
The specific test process can be that the signal source is connected with the display panel through the external PIN, then the signal is applied to the display panel to enable the display panel to display the required picture, and then the display picture of the display panel is shot through an accurate image collector to obtain the image of the display picture of the display panel. The image collector may be a high-precision high-resolution CCD camera, and the resolution of the camera is selected according to the resolution, size, shooting distance and the precision of Demura compensation of the detected panel.
In practical applications, in order to remove unevenness caused by a camera, the camera can be debugged by using a plurality of methods such as flat field correction, black and white correction, linear correction and the like, and the debugged camera is used for shooting, so that errors caused by mura of a non-display panel are avoided.
After the image of the display screen of the display panel is acquired, the image may be subjected to moire removal and distortion correction processing, and luminance deviation compensation data (demura code) may be determined based on the processed image.
The process of determining the luminance deviation compensation data from the processed image may be: determining the color distribution characteristics of each pixel in the display panel according to the processed image, calculating the gamma index value of each pixel, and identifying the mura area according to the gamma index value of each pixel and a related mura identification algorithm. And then determining brightness deviation compensation data of the mura area according to a demura compensation algorithm. The mura identification algorithm and the demura compensation algorithm may adopt an existing algorithm, and the present application is not limited thereto.
In an embodiment of the present application, after the luminance deviation compensation data of the display panel is obtained, it is known which pixels need to be subjected to luminance deviation compensation, at this time, the position coordinates of a target pixel needing luminance deviation compensation in the display panel can be derived, and the position coordinates of the target pixel are stored in the storage unit of the source driver chip.
In an embodiment of the present application, after the luminance deviation compensation data of the display panel is obtained, the obtained luminance deviation compensation data may be stored in the memory cells of the corresponding source driver chips in a partition manner. Therefore, when the display panel is used for displaying pictures, the time schedule controller can read out the brightness deviation compensation data corresponding to the display panel from the storage unit of the source electrode driving chip and carry out brightness deviation compensation.
Therefore, the display panel provided by the embodiment of the application stores the brightness deviation compensation data for brightness deviation compensation through the storage unit of the driving chip, the time schedule controller can directly read the brightness deviation compensation data through the original communication interface of the driving chip to perform brightness deviation compensation, a flash is not required to be independently arranged in the source driving board, a serial peripheral interface is not required to be arranged to perform data reading, hardware cost is saved, device layout and wiring of the source driving board are simplified, data reading efficiency and signal transmission quality are improved, and the problems that when the brightness deviation compensation is performed on the existing display panel, hardware cost is high, the source driving board is complex in device layout, and signal transmission quality is affected are effectively solved.
Based on the display panel provided by the embodiment of the application, another embodiment of the application also provides a brightness deviation compensation method. Referring to fig. 4, fig. 4 is a schematic diagram illustrating an implementation flow of the brightness deviation compensation method according to the embodiment of the present application. As shown in fig. 4, the brightness deviation compensation method provided by the embodiment of the present application may include the following steps:
s101: the luminance deviation compensation data stored in the memory cell of the driver chip is read.
In the embodiment of the present application, in order to eliminate the phenomenon that the display brightness of the display panel is not uniform, brightness deviation compensation needs to be performed on the display panel in the process of using the display panel, specifically, brightness deviation compensation may be performed on the display panel through brightness deviation compensation data.
In a specific application, the luminance deviation compensation data stored in the memory cells of the driving chip is read by the timing controller.
In a specific application, the timing controller reads the luminance deviation compensation data stored in the storage unit of the driving chip through a communication interface provided by the communication main board of the driving chip.
The time schedule controller and the driving chip can be in communication connection through communication interfaces such as a P to P interface or a mini-LVDS interface, and the time schedule controller can read out brightness deviation compensation data from the driving chip connected with the time schedule controller through the P to P interface or the mini-LVDS interface.
In the embodiment of the present application, the storage unit for storing the luminance deviation compensation data is a storage unit of the driver chip.
The driving chip may be a flip-chip thin film type source driving chip. Based on this, after the display panel is started, the time schedule controller can send the relevant configuration information of the source electrode driving chip of the crystal covered film type to the source electrode driving chip of the crystal covered film type, so that the source electrode driving chip of the crystal covered film type is configured according to the relevant configuration information, and then the brightness deviation compensation data in the storage unit of the source electrode driving chip of the crystal covered film type is read through the communication interface of the time schedule controller and the source electrode driving chip of the crystal covered film type.
In the embodiment of the present application, the luminance deviation compensation data stored in the storage unit of the source driver chip with flip-chip technology only performs luminance deviation compensation on the pixels in the display area controlled and driven by the source driver chip with flip-chip technology. The timing controller needs to read the brightness deviation compensation data stored in the storage unit of the source driver chip one by one, and then perform brightness deviation compensation on the display area one by one.
In a specific application, the timing controller can sequentially read out the brightness deviation compensation data of the display area corresponding to the source driver chip from the storage unit of the source driver chip according to the driving requirement.
For example, referring to fig. 3 again, the timing controller may first read the luminance deviation compensation data of the first display region 101 from the memory cell of the first source driver chip 11A, read the luminance deviation compensation data of the second display region 102 from the memory cell of the second source driver chip 11B, read the luminance deviation compensation data of the third display region 103 from the memory cell of the third source driver chip 11C, and so on, read the luminance deviation compensation data of the nth display region 10N from the memory cell of the nth source driver chip 11N.
S102: and performing brightness deviation compensation on the display panel according to the read brightness deviation compensation data.
In the embodiment of the present application, after the timing controller reads the luminance deviation compensation data from the storage unit of the driving chip, it is necessary to perform luminance deviation compensation on the pixels in the display area driven by the driving chip according to the read luminance deviation compensation data.
In specific application, when the time schedule controller is operated, the time schedule controller can search the brightness deviation compensation value of each pixel point in the display area according to the brightness deviation compensation data and then carry out brightness deviation compensation on the pixel point by utilizing the brightness deviation compensation value of the pixel point.
It should be noted that, when the timing controller performs the luminance deviation compensation on the pixel points by using the luminance deviation compensation values of the pixel points, the timing controller may also output a control signal for controlling the display panel to perform the image display.
In specific application, the time schedule controller can determine pixel data output to the source electrode driving chip according to pixel data of a picture to be displayed and read brightness deviation compensation data, a logic control unit of the source electrode driving chip can control the shifting register to receive one pixel data output by the time schedule controller when a rising edge of a sampling clock arrives, after all pixel data in a row are read, the shifting register can output pulses and simultaneously shift the pixel data in the row to the memory, the digital-analog converter can convert the pixel data shifted to the memory into corresponding gray voltages, and then the gray voltages converted by the digital-analog converter are output to corresponding pixel points by the output buffer, so that display driving and brightness deviation compensation are realized.
In an embodiment of the present application, since the luminance deviation compensation is only for the pixel points having luminance deviation, the target pixel point to be subjected to luminance deviation compensation may also be determined according to the obtained luminance deviation compensation data.
Therefore, the brightness deviation compensation method provided by the embodiment of the application can store the brightness deviation compensation data for brightness deviation compensation through the storage unit of the driving chip, the timing controller can directly read the brightness deviation compensation data through the original communication interface of the driving chip to perform brightness deviation compensation, a flash is not required to be independently arranged in the source driving board, a serial peripheral interface is not required to be arranged to perform data reading, hardware cost is saved, device layout and wiring of the source driving board are simplified, data reading efficiency and signal transmission quality are improved, and the problems that when the brightness deviation compensation is performed on the conventional display panel, hardware cost is high, the source driving board is complicated in device layout, and the signal transmission quality is influenced are effectively solved.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating an implementation flow of another brightness deviation compensation method according to an embodiment of the present disclosure. As shown in fig. 5, the brightness deviation compensation method provided in the embodiment of the present application further includes the following steps before S101:
s103: the luminance deviation compensation data is stored in a memory unit of the driving chip.
In the embodiment of the application, the brightness deviation compensation data of the display panel is determined by testing the brightness of the display panel, and then the brightness deviation compensation data of the display panel is burned into the storage unit of the driving chip of the display panel.
In a specific application, which display area of the display panel is controlled and driven by each driving chip is determined, then the brightness deviation compensation data of the display area is determined from the brightness deviation compensation data, and then the brightness deviation compensation data of the display area is stored in the storage unit of the driving chip.
Referring to fig. 6, in an embodiment of the present application, the step S103 may include the following steps:
s1031: and determining a blocking strategy of the brightness deviation compensation data according to the display area controlled and driven by the source driving chip.
S1032: and partitioning the brightness deviation compensation data according to the partitioning strategy to obtain partitioned data.
In the embodiment of the application, one source driving chip is only responsible for driving the pixel points in a certain area of the display panel, and the pixel points in different areas are driven by different source driving chips, so that the luminance deviation compensation data can be partitioned.
In a specific application, it may be determined which display area in the display panel each source driver chip is responsible for controlling and driving, and then it is determined that the luminance deviation compensation data is divided into several blocks of data according to the number of the display areas controlled and driven by the source driver chips, and each block of data is correspondingly stored in the memory of that source driver chip.
The above-described blocking strategy is used to describe how to block the luminance deviation compensation data.
For example, referring to fig. 3 again, it is assumed that the number of the source driver chips connected to the display panel is N, wherein the first source driver chip 11A controls and drives the first display region 101, the second source driver chip 11B controls and drives the second display region 102, and the third source driver chip 11C controls and drives the third display region 103, and so on, the nth source driver chip 11N controls and drives the nth display region 10N. Based on this, it can be determined that the blocking strategy is to divide the luminance deviation compensation data into N blocks, where the first block is the luminance deviation compensation data corresponding to the first display region 101 (i.e., contains the luminance deviation compensation value of the pixel in the first display region 101), the second block is the luminance deviation compensation data corresponding to the second display region 102 (i.e., contains the luminance deviation compensation value of the pixel in the second display region 102), the third block is the luminance deviation compensation data corresponding to the third display region 103 (i.e., contains the luminance deviation compensation value of the pixel in the third display region 103), and so on, the nth block is the luminance deviation compensation data corresponding to the nth display region 10N.
The luminance deviation compensation data is divided into N blocks according to the blocking strategy, and N blocks of block data can be obtained.
S1033: and storing the block data of the brightness deviation compensation data in the storage unit of the corresponding source driving chip.
In the embodiment of the present application, since the blocking of the luminance deviation compensation data is determined based on the display area controlled and driven by the source driver chip, the block data needs to be stored in the storage unit of the corresponding source driver chip when the block data is stored.
For example, referring to fig. 3 again, it is assumed that the number of the source driver chips connected to the display panel is N, wherein the first source driver chip 11A controls and drives the first display region 101, the second source driver chip 11B controls and drives the second display region 102, and the third source driver chip 11C controls and drives the third display region 103, and so on, the nth source driver chip 11N controls and drives the nth display region 10N, in S1032, the luminance deviation compensation data is divided into N blocks, the first block data is the luminance deviation compensation data corresponding to the first display region 101 (i.e. including the luminance deviation compensation value of the pixel point in the first display region 101), the second block data is the luminance deviation compensation data corresponding to the second display region 102 (i.e. including the luminance deviation compensation value of the pixel point in the second display region 102), and the third block data is the luminance deviation compensation data corresponding to the third display region 103 (i.e. including the third display region 103 The brightness deviation compensation value of the middle pixel point), and so on, the nth block of block data is the brightness deviation compensation data corresponding to the nth display region 10N. Then, when data is stored, it is necessary to store the first block data in the storage unit of the first source driver chip 11A, the second block data in the storage unit of the second source driver chip 11B, the third block data in the storage unit of the third source driver chip 11C, and so on, and store the nth block data in the storage unit of the nth source driver chip 11N.
As can be seen from the above, in the brightness deviation compensation method provided in the embodiment of the present application, the brightness deviation compensation data is directly stored in the storage unit of the driver chip, and the display area controlled and driven by the driver chip stores the brightness deviation compensation data in blocks, so that the brightness deviation compensation data corresponding to the display area controlled and driven by the driver chip can be directly read for brightness deviation compensation during the brightness deviation compensation, thereby effectively improving the data brightness deviation compensation efficiency.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating an implementation flow of a luminance deviation compensation method according to another embodiment of the present application. As shown in fig. 7, the brightness deviation compensation method provided in the embodiment of the present application may include the following steps:
s201: and when the time sequence controller drives the target area, reading the brightness deviation compensation data of the target pixel point from the storage unit.
S202: and performing brightness deviation compensation on the target pixel point according to the brightness deviation compensation data of the target pixel point.
In the embodiment of the present application, the target area may be a display area of the entire display panel, or may be a display area of a certain partition obtained by partitioning the display area of the display panel.
In this embodiment, the target pixel point is a pixel point that needs to be compensated for brightness deviation.
In this embodiment of the application, the timing controller may determine whether a currently driven pixel is a target pixel according to a position coordinate of a target pixel that is pre-stored in the storage unit and needs to be subjected to luminance deviation compensation, and only when the timing controller drives the target pixel, the luminance deviation compensation data of the target pixel is read from the storage unit.
In specific application, after brightness deviation compensation data of the display panel are obtained, which pixels need to be subjected to brightness deviation compensation can be known, the position coordinates of a target pixel needing the brightness deviation compensation in the display panel can be guided, the position coordinates of the target pixel are stored in a storage unit of a source electrode driving chip, before the brightness deviation compensation is carried out, a time schedule controller can firstly obtain the position coordinates of the target pixel, and then the brightness deviation compensation data of the target pixel are read from the storage unit of the source electrode driving chip when the pixel corresponding to the position coordinates of the target pixel needs to be driven.
In an implementation manner of the embodiment of the present application, when the luminance deviation compensation data is stored in the corresponding driving chip in a partitioned manner, the timing controller may also drive the display panel in a partitioned manner, at this time, when the timing controller drives the partition, the timing controller may also drive and control other pixels of the partition as needed, when a target pixel of the partition needs to be driven, the luminance deviation compensation data of the target pixel is read, and then the pixel data after the luminance deviation compensation of the target pixel is output to the driving chip after the luminance deviation compensation is performed in combination with the pixel data to be displayed, so as to implement driving.
It can be seen from the above that, when the timing controller drives the pixel corresponding to the position coordinate of the target pixel, the luminance deviation compensation data of the target pixel is read from the storage unit, then the luminance deviation compensation is performed on the target pixel according to the luminance deviation compensation data of the target pixel, and the data is read and compensated only when the luminance deviation compensation is performed on the target pixel, so that the time consumed for reading the data can be reduced, and the luminance compensation efficiency can be improved.
Referring to fig. 8, an embodiment of the present application further provides a display device 80, including the display panel 10;
a backlight module; the backlight module is arranged at the back of the display panel;
a light shielding member; and the frame is arranged around the edge of the display panel to form the frame of the display panel.
In one application, the display panel may be a device which is composed of a glass substrate, ITO conductive glass, a polarizing plate, a color filter, a liquid crystal substrate, and the like, and displays a picture by using the principle that a voltage drives a liquid crystal to change the form of the liquid crystal. For example, a Thin Film Transistor Liquid Crystal Display (TFT-LCD). In other embodiments, the Display panel may also be other types of Display panels, such as an OLED (Organic electroluminescent Display) Display panel, a QLED (Quantum Dot Light Emitting Diodes) Display panel, and the like. In the present embodiment, the type of the display panel is not particularly limited.
The backlight module is a circuit structure or a combination of devices, such as an LED light source module, a cold cathode fluorescent tube module, a hot cathode fluorescent tube module, an organic electroluminescent panel module, etc., located behind the display panel and capable of emitting light to provide a display light source for the display panel.
The shading parts are arranged around the edge of the display panel to form a frame of the display panel, and are used for protecting internal circuits and components of the display panel and avoiding generating leakage current.
In a specific application, the light shielding member is a photosensitive material manufactured by an evaporation process, and is mainly formed by mixing three components, i.e., resin (resin), sensitizer (sensitizer) and solvent (solvent), such as a light shielding photoresist made of opaque Black Matrix (BM). The light shielding member includes both a positive light shielding member and a negative light shielding member.
In an embodiment of the present Application, the modules or units in all embodiments of the present Application may be implemented by a general-purpose Integrated Circuit, such as a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit).
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A display panel is provided with a plurality of driving chips, one ends of the driving chips are connected with the display panel, and the other ends of the driving chips are connected with a source driving board;
the timing controller performs brightness deviation compensation on the display panel by reading the brightness deviation compensation data stored in the memory cell of the driving chip.
2. The display panel according to claim 1, wherein the driving chip includes a memory cell; the communication mainboard is connected with the storage unit; a logic control unit; the shift register unit is connected with the logic control unit; a memory connected to the logic control unit; the digital-to-analog converter is connected with the memory, and the output buffer is connected with the digital-to-analog converter;
the driving chip is connected with the time sequence controller through a communication interface provided by the communication mainboard.
3. The display panel according to claim 1, wherein the display panel comprises a plurality of display regions, each display region being controlled and driven by a corresponding driving chip; accordingly, the timing controller performs luminance deviation compensation on the display panel by reading the luminance deviation compensation data stored in the memory cell of the driving chip, including:
and reading the brightness deviation compensation data from the storage unit of the driving chip, and performing brightness deviation compensation on the pixel points in the corresponding display area according to the brightness deviation compensation data.
4. The display panel according to any one of claims 1 to 3, wherein the driving chip is a source driving chip.
5. The display panel according to claim 4, wherein the source driver chip is a flip-chip thin film type source driver chip.
6. A luminance deviation compensation method applied to the display panel according to any one of claims 1 to 5, the luminance deviation compensation method comprising:
reading the brightness deviation compensation data stored in the memory cell of the driver chip;
and performing brightness deviation compensation on the display panel according to the read brightness deviation compensation data.
7. The luminance deviation compensation method as claimed in claim 6, wherein said reading the luminance deviation compensation data stored in the memory cell of the driver chip comprises:
the time schedule controller reads the brightness deviation compensation data stored in the storage unit of the driving chip through a communication interface provided by a communication mainboard of the driving chip;
the performing brightness deviation compensation on the display panel according to the read brightness deviation compensation data includes:
the time sequence controller determines pixel data output to the source electrode driving chip according to the pixel data of the picture to be displayed and the read brightness deviation compensation data;
the logic control unit of the source driving chip controls the shift register of the source driving chip to receive one pixel data output by the timing controller when the rising edge of the sampling clock arrives;
when all pixel data in a row are read, the shift register of the source driving chip outputs pulses and simultaneously moves all the pixel data in the row to the memory of the source driving chip;
the digital-to-analog converter of the source driving chip converts the pixel data moved into the memory of the source driving chip into corresponding gray voltages;
the output buffer of the source driving chip outputs the gray scale voltage converted by the digital-to-analog converter of the source driving chip to the corresponding pixel point in the display panel.
8. The method according to claim 7, wherein the performing the luminance deviation compensation on the display panel according to the read luminance deviation compensation data comprises:
determining a blocking strategy of brightness deviation compensation data according to a display area controlled and driven by a source driving chip;
partitioning the brightness deviation compensation data according to the partitioning strategy to obtain partitioned data;
and storing the block data of the brightness deviation compensation data in the storage unit of the corresponding source driving chip.
9. The luminance deviation compensation method according to claim 6 or 8, wherein said reading the luminance deviation compensation data stored in the memory cell of the driver chip comprises:
reading brightness deviation compensation data of a target pixel point from the storage unit when the time sequence controller drives a target area;
correspondingly, the performing brightness deviation compensation on the display panel according to the read brightness deviation compensation data includes:
and performing brightness deviation compensation on the target pixel point according to the brightness deviation compensation data of the target pixel point.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 6;
a backlight module; the backlight module is arranged at the back of the display panel;
a light shielding member; and the frame is arranged around the edge of the display panel to form the frame of the display panel.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115083366A (en) * | 2022-07-07 | 2022-09-20 | Tcl华星光电技术有限公司 | Compensation method and compensation device for mura phenomenon of display panel |
| CN115359765A (en) * | 2022-08-30 | 2022-11-18 | Tcl华星光电技术有限公司 | Display device and brightness compensation method thereof |
| US12288516B2 (en) | 2022-06-24 | 2025-04-29 | Hefei Boe Joint Technology Co., Ltd. | Display module and display device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104025177A (en) * | 2011-12-30 | 2014-09-03 | （株）赛丽康 | Brightness Compensation Device for Organic Light Emitting Diode Panel |
| KR20180052367A (en) * | 2016-11-10 | 2018-05-18 | 엘지디스플레이 주식회사 | Display device and its driving method |
| CN108847172A (en) * | 2018-08-27 | 2018-11-20 | 惠科股份有限公司 | Driving device and driving method |
| US20180342211A1 (en) * | 2017-05-03 | 2018-11-29 | Shenzhen China Star Optoelectronics Technology Co. , Ltd. | Mura compensation method for display panel and display panel |
| KR20190023480A (en) * | 2017-08-29 | 2019-03-08 | 엘지디스플레이 주식회사 | Organic light emitting display device |
| CN109658853A (en) * | 2018-12-13 | 2019-04-19 | 惠科股份有限公司 | Display test method, drive circuit and compensation detection device of display device |
| CN110517635A (en) * | 2019-08-30 | 2019-11-29 | 云谷（固安）科技有限公司 | A kind of driving chip and display device |
| CN111883037A (en) * | 2020-07-28 | 2020-11-03 | 重庆惠科金渝光电科技有限公司 | Time sequence control plate, driving device and display device |
| CN113129802A (en) * | 2021-04-22 | 2021-07-16 | 昆山国显光电有限公司 | Drive chip, data storage method and display device |
| CN113393811A (en) * | 2020-03-12 | 2021-09-14 | 咸阳彩虹光电科技有限公司 | Novel brightness unevenness compensation method and device and display panel |
-
2021
- 2021-12-29 CN CN202111644949.1A patent/CN114283729B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104025177A (en) * | 2011-12-30 | 2014-09-03 | （株）赛丽康 | Brightness Compensation Device for Organic Light Emitting Diode Panel |
| KR20180052367A (en) * | 2016-11-10 | 2018-05-18 | 엘지디스플레이 주식회사 | Display device and its driving method |
| US20180342211A1 (en) * | 2017-05-03 | 2018-11-29 | Shenzhen China Star Optoelectronics Technology Co. , Ltd. | Mura compensation method for display panel and display panel |
| KR20190023480A (en) * | 2017-08-29 | 2019-03-08 | 엘지디스플레이 주식회사 | Organic light emitting display device |
| CN108847172A (en) * | 2018-08-27 | 2018-11-20 | 惠科股份有限公司 | Driving device and driving method |
| CN109658853A (en) * | 2018-12-13 | 2019-04-19 | 惠科股份有限公司 | Display test method, drive circuit and compensation detection device of display device |
| CN110517635A (en) * | 2019-08-30 | 2019-11-29 | 云谷（固安）科技有限公司 | A kind of driving chip and display device |
| CN113393811A (en) * | 2020-03-12 | 2021-09-14 | 咸阳彩虹光电科技有限公司 | Novel brightness unevenness compensation method and device and display panel |
| CN111883037A (en) * | 2020-07-28 | 2020-11-03 | 重庆惠科金渝光电科技有限公司 | Time sequence control plate, driving device and display device |
| CN113129802A (en) * | 2021-04-22 | 2021-07-16 | 昆山国显光电有限公司 | Drive chip, data storage method and display device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12288516B2 (en) | 2022-06-24 | 2025-04-29 | Hefei Boe Joint Technology Co., Ltd. | Display module and display device |
| CN115083366A (en) * | 2022-07-07 | 2022-09-20 | Tcl华星光电技术有限公司 | Compensation method and compensation device for mura phenomenon of display panel |
| CN115083366B (en) * | 2022-07-07 | 2023-09-26 | Tcl华星光电技术有限公司 | Compensation method and compensation device for mura phenomenon of display panel |
| CN115359765A (en) * | 2022-08-30 | 2022-11-18 | Tcl华星光电技术有限公司 | Display device and brightness compensation method thereof |
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| Publication number | Publication date |
|---|---|
| CN114283729B (en) | 2024-04-19 |
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