WO2020134963A1 - Procédé et dispositif de commande d'un panneau d'affichage et support d'informations lisible - Google Patents

Procédé et dispositif de commande d'un panneau d'affichage et support d'informations lisible Download PDF

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Publication number
WO2020134963A1
WO2020134963A1 PCT/CN2019/123605 CN2019123605W WO2020134963A1 WO 2020134963 A1 WO2020134963 A1 WO 2020134963A1 CN 2019123605 W CN2019123605 W CN 2019123605W WO 2020134963 A1 WO2020134963 A1 WO 2020134963A1
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Prior art keywords
display panel
signal
target pixel
source
length
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PCT/CN2019/123605
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English (en)
Chinese (zh)
Inventor
曾德康
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惠科股份有限公司
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Publication of WO2020134963A1 publication Critical patent/WO2020134963A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels

Definitions

  • the present application relates to the field of display technology, in particular, a display panel drive control method, a display panel drive device, and a readable storage medium.
  • the fanout area (fan-out area) has layouts for the gate driver and the source driver. Since the source driving signal is transmitted from the source driver to the thin film transistors at different locations in the fanout area, the source driving signal is subject to RC delay(Resistor-Capacitance delay, resistance capacitance delay) is not the same. The longer the transmission distance, the source drive signals obtained from the pixels at the far end are likely to be deformed, resulting in the appearance of color cast on the display screen.
  • the main purpose of the present application is to provide a display panel driving method aimed at improving the display quality of a display screen.
  • the display panel driving method includes the following steps:
  • the source driving signal of the target pixel is compensated according to the compensation signal.
  • a display panel driving method proposed in an embodiment of the present application determines a target pixel according to a gate driving signal, and compensates the source driving signal of the target pixel for the target pixel with a different signal transmission distance according to the corresponding compensation signal, so that the transmission to The source drive signal at this position will not be RC due to the transmission distance
  • the delay phenomenon causes the signal to be deformed, so that the pixel voltages of the pixels at different positions on the display panel are consistent, to avoid the color shift phenomenon on the display screen, and to improve the display quality of the display screen.
  • FIG. 1 is a schematic diagram of a pixel distribution structure of a display panel in an embodiment of the present application
  • FIG. 2 is a schematic diagram of the hardware structure of a display panel drive control device in an embodiment of the present application
  • FIG. 3 is a schematic flowchart of a display panel driving method in an embodiment of the application.
  • FIG. 4 is a schematic flowchart of a display panel driving method in another embodiment of this application.
  • FIG. 5 is a schematic flowchart of a driving method of a display panel in another embodiment of the present application.
  • the main solutions of the embodiments of the present application are: acquiring a gate driving signal; determining a target pixel according to the gate driving signal; determining a corresponding compensation signal according to the signal transmission distance of the source driving signal of the target pixel; And, the source driving signal of the target pixel is compensated according to the compensation signal.
  • the present application provides a solution for determining a target pixel point according to a gate drive signal, and for a target pixel point with a different signal transmission distance according to a corresponding compensation signal to compensate the source drive signal of the target pixel point so that the source electrode transmitted to the position Drive signal will not be RC due to transmission distance
  • the delay phenomenon causes the signal to be deformed, so that the pixel voltages of the pixels at different positions on the display panel are consistent, which can avoid the color shift phenomenon on the display screen and improve the display quality of the display screen.
  • a display panel is provided.
  • the display panel includes a plurality of gate lines 100, a plurality of source lines 200, a plurality of thin film transistors 300, a gate driver 400, and a source electrode
  • the driver 500, the gate driver 400 and the source driver 500 are all connected to the processor 6001.
  • a plurality of the gate lines 100 and a plurality of the source lines 200 intersect, and the intersection of the gate lines 100 and the source lines 200 is provided with the thin film transistor 300, each of the thin film transistors 300
  • the gates are connected to the gate driver 400 through a gate line 100 respectively, and the sources of the thin film transistors 300 are connected to the source driver 500 through a source line 200 respectively.
  • the display panel further includes an operational amplifier (not shown), and one end of each source line 200 connected to the source driver 500 is connected to the operational amplifier (not shown).
  • the display panel may specifically be a liquid crystal display panel.
  • the display panel includes a driving area 10 and a fan-out area 20, a gate driver 400 and a source driver 500 are provided in the driving area 10, and a plurality of gate lines 100 are distributed in the fan-out area 20 at intervals and are connected to the driving
  • the gate driver 400 in the region 10 is connected, and a plurality of source lines 200 are arranged at intervals in the fan-out region 20 and connected to the source driver 500 in the driving region 10.
  • a plurality of source lines 200 are arranged orthogonal to a plurality of gate lines 100, wherein the gate lines 100 extend in the lateral direction (forming rows), and the source lines 200 extend in the longitudinal direction (forming columns).
  • the focal points of the gate line 100 and the source line 200 are defined as pixels.
  • Each pixel is provided with a thin film transistor 300.
  • the source of each thin film transistor 300 is connected to the source driver 500 through a source line 200.
  • the gates of the transistor 300 are connected to the gate driver 400 through a gate line 100, respectively.
  • the gates of the thin film transistors 300 in the same row can be connected in series on the same gate line 100.
  • the gate driver 400 sends a gate driving signal to the gate of the thin film transistor 300 through the gate line 100 to turn on the thin film transistor 300 on the display panel in sequence.
  • each gate driving signal specifically includes the selected target pixel and the turn-on signal of the target pixel.
  • the source driver 500 transmits the data voltage corresponding to the pixel where the thin film transistor 300 is located to the source of the thin film transistor 300 through the source line 200.
  • the brightness of the pixels is controlled by the voltage difference between the data voltage and the common voltage of the common electrodes of the display panel, thereby realizing the display of the image on the display panel.
  • There may be a plurality of gate drivers 400 and/or source drivers 500 each gate driver 400 and/or source driver 500 may be connected to several thin film transistors 300, and each gate driver 400 and/or source electrode
  • the driver 500 controls the development of pixels where thin film transistors 300 connected thereto are located, respectively.
  • the display panel further includes an operational amplifier (not shown).
  • Each signal line connected to the source driver 500 of the source line 200 is provided with an operational amplifier (not shown).
  • the operational amplifier (not shown) can amplify the output power of the source driving signal output from the source driver 500 to the target pixel according to the compensation signal, which can be used to ensure that the pixel voltages of the pixels at different positions on the display panel are the same and avoid display There is a color cast on the screen.
  • the display panel may further include a display panel drive control device 600.
  • the display panel drive control device 600 may include a processor 6001, such as a CPU, a memory 6002, and a communication bus 6003.
  • the communication bus 6003 is used to implement connection communication between these components.
  • the memory 6002 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as disk storage.
  • the memory 6002 may optionally be a storage device independent of the foregoing processor 6001.
  • the device structure shown in FIG. 2 does not constitute a limitation on the device, and may include more or less components than shown, or combine some components, or arrange different components.
  • the memory 6002 as a computer storage medium may include a display panel driver.
  • the processor may be connected to the gate driver 400 and the source driver 500, respectively.
  • the processor 6001 may be used to call the display panel driver stored in the memory 6002, and perform operations related to the steps of the display panel driving method in the following embodiments.
  • the present application provides a display panel driving method.
  • the display panel driving method includes:
  • Step S10 obtaining a gate driving signal
  • the processor obtains the gate driving signal from the gate driver 400.
  • the gate driving signal specifically includes the selected target pixel and the turn-on signal of the target pixel.
  • Step S20 Determine a target pixel according to the gate driving signal
  • the target pixel is a pixel selected among all the pixels of the display panel to turn on the thin film transistor 300 and input a corresponding source driving signal through the source line 200.
  • Step S30 Determine the corresponding compensation signal according to the signal transmission distance of the source driving signal of the target pixel point;
  • the signal transmission distance specifically refers to the distance required for the source driving signal sent by the source driver 500 to be transmitted to the target pixel connected thereto. Different pixel points distributed along the extending direction of the source line 200 correspond to different signal transmission distances.
  • the signal transmission distance can be characterized by the following parameters: the distance between the target pixel and the source driver 500, the length of the source line 200 between the location of the target pixel and the source driver 500, and so on.
  • the signal transmission distance can be characterized by the following parameters: target The position of the pixel in the fan-out area 20 (such as the coordinates of the target pixel in the pixel array formed by all pixels) or the area where the target pixel is located in the fan-out area 20, etc.; when the source driver 500 includes When there are multiple, the signal transmission distance can be characterized by the following parameters: the position of the target pixel in the fan-out area 20 (such as the coordinates of the target pixel in the pixel array formed by all pixels) or on the fan-out area 20 The area where the source driver 500 connected to the target pixel is located in the driving area 10 or the area where the driving area 10 is located, etc.
  • the compensation signal may specifically include amplified voltage, amplified power, and the like.
  • Step S40 Compensate the source driving signal of the target pixel according to the compensation signal.
  • step S40 includes:
  • Step S41 Determine the corresponding amplified power according to the compensation signal.
  • Step S42 Amplify the source driving signal of the target pixel according to the amplification power.
  • the compensator described above is specifically an operational amplifier (not shown), and each signal line connected to the source driver 500 of each source line 200 is connected to an operational amplifier (not shown).
  • the processor can send the compensation signal to an operational amplifier (not shown).
  • the compensation signal includes the amplified power. After the operating amplifier receives the compensation signal, the amplified power in the compensation signal is extracted, and the source driver 500 is output to the target according to the amplified power The output power of the pixels is amplified.
  • a display panel driving method which determines target pixel points according to the gate drive signal, and compensates the source drive signal of the target pixel point for the target pixel points with different signal transmission distances according to the corresponding compensation signal, so that The source drive signal transmitted to this position will not be RC due to the transmission distance
  • the delay phenomenon causes the signal to be deformed, so that the pixel voltages of the pixels at different positions on the display panel are consistent, to avoid the color shift phenomenon on the display screen, and to improve the display quality of the display screen.
  • the step of determining the corresponding compensation signal according to the signal transmission distance of the source driving signal of the target pixel includes:
  • Step S31 Determine the signal transmission distance according to the position of the target pixel relative to the source driver 500; wherein, the source driver 500 sends out the source driving signal;
  • the position of the target pixel relative to the source driver 500 can be established by establishing a preset coordinate system on the display panel, by determining the first coordinate of the target pixel on the preset coordinate system and the source driver 500 Set the second coordinate on the coordinate system, and characterize the position of the target pixel point relative to the source driver 500 through the relationship between the first coordinate and the second coordinate.
  • the distance between the target pixel and the source driver 500 can be calculated through the first coordinate and the second coordinate, and the calculated distance combined with the routing rule of the source line 200 connecting the source driver and the target pixel (such as straight wiring , Bending line wiring, etc.) can determine the signal transmission distance of the source driving signal transmitted to the target pixel.
  • the origin of the preset coordinate system may be set at the location where the source driver 500 is located.
  • different preset coordinate systems may be correspondingly set.
  • the distance between the target pixel point and the source driver 500 is calculated by determining the coordinates through a preset coordinate system corresponding to the source driver 500 connected to the target pixel point.
  • Step S32 Determine the corresponding compensation signal according to the signal transmission distance.
  • the corresponding signal transmission distance is generally greater, so the target pixel is located relative to the source driver 500
  • the position is used to characterize the signal transmission distance, and a more accurate signal transmission distance can be obtained, thereby obtaining a more accurate compensation signal to compensate the source driving signal of the target pixel.
  • the display panel includes a driving region 10 and a fan-out region 20, a source driver 500 emitting the source driving signal and a gate driver 400 emitting the gate driving signal are located in the driving region 10, the target The pixel is located in the fan-out area 20.
  • the step of determining the signal transmission distance according to the position of the target pixel relative to the source driver 500 includes:
  • Step S311 Determine the preset area where the target pixel is located in the fan-out area 20;
  • the fan-out area 20 can be pre-divided into several presets according to the wiring of the source line 200, the distribution characteristics of pixels, the relative position between the fan-out area 20 and the driving area 10 or the source driver 500 in the driving area 10, etc. area. As shown in FIG. 1, in the fan-out area 20, the fan-out area 20 is divided into a plurality of preset areas along the extending direction of the source driving line, as shown in area 1, area 2, area 3, and area 4 in the figure.
  • the driving region 10 may include a vertical driving region and a lateral driving region.
  • the gate driver 400 is specifically disposed in the lateral driving region, and the source driver 500 is specifically disposed in the middle of the vertical driving region.
  • mapping relationship between each pixel in the fan-out area 20 and the preset area is established, and the preset area in which the target pixel is located in the fan-out area 20 can be determined according to the mapping relationship.
  • Step S312 Determine a corresponding preset distance as the signal transmission distance according to the preset area.
  • the signal transmission distances between the pixels in different preset areas and the source driver 500 can be characterized by different preset distances, respectively. Different preset areas correspond to different preset distances.
  • the preset distance can be determined according to the length of the source line 200 between each pixel in the preset area and the source driver 500, for example, by means of mean value, weighted average, etc., according to different pixels in the preset area and the source
  • the length of the source line 200 between the pole drivers 500 calculates a preset distance. Different preset distances correspond to different compensation signals.
  • the preset distance corresponding to the area can be determined as the signal transmission distance through the lookup table according to the above relationship, and the compensation signal corresponding to the determined preset distance can be used as the compensation of the source drive signal of the target pixel signal.
  • the distance difference between the preset distances corresponding to the adjacent preset areas can be selected as the above target length, and correspondingly, the preset distances corresponding to the adjacent preset areas correspond to The amplified voltage difference and/or amplified power difference in the compensation signal can be determined according to the target length.
  • the fan-out area 20 is divided into different preset areas, the signal transmission distance is characterized by different preset areas, and the source drive signals of the target pixels in the same area are compensated according to the same compensation signal , While preventing the color shift phenomenon of the display screen, it also avoids that the instability of the individual compensation of each target pixel affects the integrity of the screen display.
  • the preset area may be divided according to the length of the source line 200 between the pixel in the area and the source driver 500, and before the step of obtaining the gate driving signal, the method further includes:
  • Step S01 Obtain the length of the source line between each pixel in the fan-out area and the source driver;
  • the length of the source line 200 between each pixel in the fan-out area and the source driver 500 can be measured, and the measured length can be input as an input parameter.
  • Obtaining input parameters can obtain the length between each pixel in the fan-out area and the source driver and the source line.
  • the hardware design parameters of the display panel can also be obtained, and the length of the source line 200 between each pixel and the source driver 500 is extracted from the hardware design parameters.
  • the hardware design parameters are the hardware parameters of the display panel and the technical parameters that realize the connection and coordination between the hardware modules made by the designer of the display panel, which may specifically include the electronic components in the display panel, and the work indicators of the electronic components themselves Parameters, distribution position of electronic components, index parameters of connecting lines between electronic components (such as type, line length, joints, etc.).
  • Step S02 dividing the acquired length into several length intervals
  • the acquired length may be divided into at least two consecutive length intervals.
  • Step S03 Divide the fan-out area into a plurality of preset areas according to the length interval.
  • Pixels whose length of the source line 200 and the source driver 500 are within the same length interval are divided into the same preset area. Two adjacent preset areas have an area boundary, and the length of the source line 200 between the pixel located on the same area boundary and the source driver 500 is equal.
  • the preset area is divided according to the length of the source line 200 between the pixel point and the source driver 500, and the divided preset area can accurately represent the distance of the signal transmission distance of the pixel point in the area, so that each area The pixels in can get accurate signal compensation.
  • the step of dividing the acquired length into several length intervals includes:
  • Step S021 obtaining the preset correspondence between the color shift amount and the signal transmission distance
  • the corresponding source drive signal is determined according to the target gray scale, and is defined as the reference drive signal.
  • the reference drive signal After pixels at different signal transmission distances send reference driving signals, test the actual grayscale of each pixel, and use the grayscale difference between the actual grayscale of each pixel and the target grayscale as the amount of color shift corresponding to that pixel. And the corresponding relationship between the obtained color shift amount and the signal transmission distance of the pixel.
  • Step S022 Determine the interval range of the length interval according to the preset correspondence relationship and the visual color shift recognition threshold
  • the minimum value of the color deviation amount that can be recognized by vision can be defined as the visual color deviation recognition threshold. According to the visual color shift recognition threshold and the preset correspondence, the distance range in which the color shift cannot be visually recognized can be determined, and the distance range or the length value less than the distance range is taken as the range range of each length range.
  • Step S023 Divide the acquired length into several length intervals according to the interval range.
  • the obtained length is divided into several consecutive length intervals according to the determined interval range, and the interval range is the difference between the interval critical values of the respective length intervals.
  • the preset interval between the color shift amount and the signal transmission distance is combined with the visual color shift recognition threshold to divide the length interval, so that the preset area divided based on the length interval is more accurate.
  • the preset distance corresponding to each preset area may be determined according to the distance amplitude, and the difference between the preset distances corresponding to the adjacent preset areas is the determined distance amplitude.
  • the step of determining the corresponding compensation signal according to the signal transmission distance of the source driving signal of the target pixel further includes:
  • Step S33 Obtain the length of the source line 200 between the target pixel point and the source driver 500;
  • the length of the source line 200 between each pixel and the source driver 500 can be measured, and the measured length can be stored in association with its corresponding pixel. After the target pixel is determined, the length associated with the target pixel from the memory can be obtained as the length of the source line 200 between the target pixel and the source driver 500.
  • the hardware design parameters of the display panel can also be obtained, and the length of the source line 200 between the target pixel and the source driver 500 is extracted from the hardware design parameters.
  • Step S34 determining the length as the signal transmission distance
  • the length of the source line 200 between the target pixel point and the source driver 500 can be directly used as the signal transmission distance of the source driving signal.
  • Step S35 Determine the corresponding compensation signal according to the signal transmission distance.
  • Different signal transmission distances can correspond to different compensation signals, and a preset formula between the compensation signal and the signal transmission distance can be established, and the corresponding compensation signal can be calculated by the preset formula and the determined signal transmission distance.
  • the length of the source line 200 between the target pixel point and the source driver 500 is determined as the signal transmission distance to determine the corresponding compensation signal, which accurately characterizes the signal transmission distance and is beneficial to the determined
  • the compensation signal is more accurate and reliable, effectively avoiding the color cast of the display panel.
  • the embodiments of the present application also provide a display panel driving device.
  • the display panel driving device includes:
  • the signal receiver is set to obtain the gate drive signal
  • the first analyzer is configured to determine the target pixel point on the display panel according to the gate driving signal
  • a second analyzer configured to determine the corresponding compensation signal according to the signal transmission distance of the source drive signal of the target pixel
  • the compensator is configured to compensate the source driving signal of the target pixel according to the compensation signal.
  • the compensator is an operational amplifier, configured to determine the corresponding amplification power according to the compensation signal; and, amplify the source driving signal of the target pixel according to the amplification power.
  • the second analyzer includes a first distance analysis unit and a first signal determination unit,
  • the distance analysis unit is configured to determine the signal transmission distance according to the position of the target pixel relative to the source driver; wherein the source driver sends the source driving signal;
  • the signal determination unit is configured to determine the corresponding compensation signal according to the signal transmission distance.
  • the display panel includes a driving area and a fan-out area, a source driver emitting the source driving signal and a gate driver emitting the gate driving signal are located in the driving area, and the target pixel point is located In the fan-out area, the distance analysis unit is specifically configured to determine an area where the target pixel is located in the fan-out area; and determine the signal transmission distance according to the area.
  • the second analyzer may further include a line length determination unit, a second distance analysis unit, and a second signal determination unit.
  • the line length determining unit is configured to acquire the length of the source line between the target pixel point and the source driver;
  • the second distance analysis unit is configured to determine the length as the signal transmission distance
  • the second signal determination unit is configured to determine the corresponding compensation signal according to the signal transmission distance.
  • an embodiment of the present application also provides a readable storage medium that stores a display panel driver program, and when the display panel driver program is executed by a processor, a display panel driving method described below is implemented step:
  • the source driving signal of the target pixel is compensated according to the compensation signal.
  • the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware, but in many cases the former is optional Implementation.
  • the technical solution of the present application can be embodied in the form of a software product in essence or part that contributes to the existing technology, and the computer software product is stored in a storage medium (such as ROM/RAM) as described above , Disk, CD), including several instructions to make a terminal device (which can be a mobile phone, computer, server, air conditioner, or network equipment, etc.) to perform the method described in each embodiment of the present application.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

La présente invention concerne un procédé de commande d'un panneau d'affichage, un dispositif de commande d'un panneau d'affichage et un support d'informations lisible. Le procédé comprend les étapes suivantes : étape S10, l'acquisition d'un signal de commande de grille ; étape S20, la détermination d'un point de pixel cible selon le signal de commande de grille ; étape S30, la détermination d'un signal de compensation correspondant selon une distance de transmission de signal d'un signal de commande de source du point de pixel cible ; et étape S40, la compensation du signal de commande de source du point de pixel cible selon le signal de compensation.
PCT/CN2019/123605 2018-12-24 2019-12-06 Procédé et dispositif de commande d'un panneau d'affichage et support d'informations lisible WO2020134963A1 (fr)

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CN201811588262.9A CN109509453B (zh) 2018-12-24 2018-12-24 显示面板驱动方法、装置和可读存储介质
CN201811588262.9 2018-12-24

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TWI767286B (zh) * 2020-07-29 2022-06-11 大陸商北京集創北方科技股份有限公司 顯示面板的行驅動方法及利用其之顯示面板和資訊處理裝置
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