WO2020113653A1 - 显示面板的驱动方法和驱动电路 - Google Patents

显示面板的驱动方法和驱动电路 Download PDF

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WO2020113653A1
WO2020113653A1 PCT/CN2018/121012 CN2018121012W WO2020113653A1 WO 2020113653 A1 WO2020113653 A1 WO 2020113653A1 CN 2018121012 W CN2018121012 W CN 2018121012W WO 2020113653 A1 WO2020113653 A1 WO 2020113653A1
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gamma
display panel
chip
digital code
driving method
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PCT/CN2018/121012
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English (en)
French (fr)
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邱彬
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惠科股份有限公司
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Priority to US17/041,417 priority Critical patent/US11049430B2/en
Publication of WO2020113653A1 publication Critical patent/WO2020113653A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours

Definitions

  • the present application relates to the field of display technology, in particular to a display panel driving method and driving circuit.
  • liquid crystal displays which include a liquid crystal panel and a backlight module.
  • the working principle of the liquid crystal panel is to place liquid crystal molecules in two parallel glass substrates, and apply a driving voltage on the two glass substrates to control the rotation direction of the liquid crystal molecules, so as to refract the light of the backlight module to generate a picture.
  • a thin film transistor liquid crystal display includes a liquid crystal panel and a backlight module.
  • the liquid crystal panel includes a color filter substrate (Color Filter Substrate, CF Substrate, also known as a color filter substrate), a thin film transistor array substrate (Thin Film Transistor Substrate, TFT Substrate)
  • CF Substrate Color Filter Substrate
  • TFT Substrate thin film transistor array substrate
  • a layer of liquid crystal molecules Liquid Crystal, LC is sandwiched between the two substrates.
  • the difference between the charging of the data cable from the near end and the far end of the data driver chip becomes more and more obvious, which is expressed as The far-end charging effect is poor, the brightness is low, and the near-end part has better charging effect and higher brightness.
  • the present application provides a display panel driving method and driving circuit to improve the poor display effect of the display panel.
  • This application provides a driving method for a display panel, including:
  • the display panel is divided into multiple charging areas in advance, a unique digital code is determined for each charging area, and the corresponding information of the charging area and the digital code is stored in the timing control chip in advance;
  • the timing control chip Detect the charging area where the pixel to be charged is located, and the timing control chip outputs the corresponding digital code according to the charging area;
  • the timing control chip outputs the digital code to the gamma chip, and the gamma chip receives the digital code, and outputs the gamma voltage corresponding to the digital code according to the digital code to drive the charging work of the charging area corresponding to the digital code.
  • the gamma chip includes a digital-to-analog circuit; the digital code is converted into an analog signal by the digital-to-analog circuit.
  • the steps include:
  • the gamma chip outputs different gamma voltages for driving according to different analog signals.
  • the step of detecting the charging area where the pixel to be charged is located, and the timing control chip outputting the corresponding digital code according to the charging area includes:
  • the counter of the timing control chip counts the number of rows of the data line.
  • the steps include:
  • the timing control chip recognizes the count value of the counter.
  • timing control chip After the timing control chip recognizes the count value of the counter, it includes the steps of:
  • the count value of the counter is divided into 100, 200, 300, and 400.
  • the count value of the counter corresponds to 4 sets of digital codes of different sizes.
  • the gamma voltage corresponding to each group of digital codes also increases sequentially.
  • both the upper and lower sides of the display panel are provided with data driving chips, and the data line is driven bilaterally.
  • only the upper side or the lower side of the display panel is provided with a data driving chip, and a data line unilateral driving mode is adopted.
  • the farther the charging area is from the data driving chip the greater the corresponding gamma voltage.
  • the gamma chip includes a programmable gamma voltage generating circuit that generates at least two different gamma voltages.
  • the Sohu Gamma chip generates at least two different gamma voltages through a resistor divider, and the gamma circuit generates the resistor divider.
  • each gamma chip generates a gamma voltage
  • the magnitude of the gamma voltage generated by each gamma chip corresponds to the digital code
  • the gamma chip includes at least two data interfaces.
  • each of the data interfaces receives different digital codes, and drives the gamma chip to generate different gamma voltages.
  • the application also discloses a driving method of the display panel, including:
  • the display panel is divided into multiple charging areas in advance, a unique digital code is determined for each charging area, and the corresponding information of the charging area and the digital code is stored in the timing control chip in advance;
  • the counter of the timing control chip counts the number of data lines
  • the timing control chip recognizes the count value of the counter and obtains the corresponding digital code from the memory to output; the digital code is converted into an analog signal by a digital-to-analog circuit; the gamma chip outputs different gamma voltages according to different analog signals to drive the digital code corresponding The charging area of the charging area; and the farther the charging area from the data driving chip, the greater the corresponding gamma voltage.
  • the present application also discloses a drive circuit for a display panel.
  • the drive circuit according to the claims includes: a timing control chip provided with a control circuit, a line counter coupled to the control circuit, and a memory; a gamma chip provided There is a digital-to-analog circuit; the timing control chip obtains a corresponding digital code from the memory for output according to the count value of the line counter; and the gamma chip outputs a corresponding gamma voltage according to the received digital code.
  • the timing control chip first detects the digital code corresponding to the charging area, and then the gamma chip receives the digital code and outputs different gamma voltages to the charging area corresponding to the digital code according to the digital code. Adjust the gamma voltage of the charging difference, and give the darker charging area a higher actual gamma voltage than the standard gamma voltage, so that the brightness of the corresponding charging area is enhanced, reducing or even eliminating the brightness difference from other areas.
  • FIG. 1 is a schematic diagram of a flow of a method for driving a display panel according to an embodiment of the present application
  • FIG. 2 is a specific schematic diagram of a flow of a method for driving a display panel according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of a display panel assembly according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a display panel driving circuit according to an embodiment of the present application.
  • connection should be understood in a broad sense, for example, it can be fixed connection or detachable Connected, or connected integrally; either mechanically or electrically; directly connected, or indirectly connected through an intermediary, or internally connected between two components.
  • an embodiment of the present application discloses a driving method of a display panel 80, which includes the steps of:
  • the display panel 80 is divided into a plurality of charging areas 70 in advance, a unique digital code is determined for each charging area 70, and the corresponding information of the charging area 70 and the digital code is stored in advance to Timing control chip 10;
  • the timing control chip 10 outputs the digital code to the gamma chip 20, and the gamma chip 20 receives the digital code, and outputs different gamma voltages according to the digital code to drive the charging work of the charging area 70 corresponding to the digital code.
  • the timing control chip 10 detects the digital code corresponding to the charging area 70, and then, the gamma chip 20 receives the digital code and outputs different gamma voltages to the charging area 70 corresponding to the digital code according to the digital code.
  • the gamma voltage can be adjusted according to the charging difference of the charging area 70, and the darker charging area 70 can be given a higher actual gamma voltage than the standard gamma voltage, so that the brightness of the corresponding charging area 70 is enhanced, reducing or even eliminating The brightness difference of the area.
  • the gamma chip 20 includes a digital-to-analog circuit 50; the digital code is converted into an analog signal by the digital-to-analog circuit 50; and the gamma chip 20 outputs different gamma voltages for driving according to different analog signals.
  • the memory can be saved in the gamma chip 20 while avoiding the risk of the gamma chip 20 being rewritten, ensuring that the gamma chip 20 outputs the correct gamma voltage to the corresponding charging area 70, and ensuring the display
  • the panel 80 will not cause uneven display brightness due to the non-corresponding gamma voltage;
  • the gamma chip 20 includes a digital-to-analog circuit 50 so that the digital code is recognized as an analog signal to drive the gamma chip 20 to output different gamma
  • the horse voltage is used to drive the different charging regions 70 of the display panel 80 to offset the difference.
  • the charging area 70 where the pixel to be charged is located is detected, and the step of the timing control chip 10 outputting the corresponding digital code according to the charging area 70 includes:
  • the counter of the timing control chip 10 counts the number of rows of the data line
  • the timing control chip 10 recognizes the count value of the counter, obtains the corresponding digital code from the memory, and outputs it.
  • the timing control chip 10 includes a line counter 30. Since the principle of the line counter 30 is that the count X increases by 1 for each line of charging completed, and the number of lines of the scanning line is different, the distance between the corresponding pixel and the data driving chip is also different. In this way, the number of rows is used to indicate the distance of the pixels away from the data driving chip; in this way, we can design the control method when the count X is a different value according to requirements.
  • the count X can be divided into four levels, that is, 100, 200, 300, 400 Correspondingly, there are also 4 sets of digital codes of different sizes, and the gamma voltage corresponding to each set of digital codes is also increased in sequence; the detection and control circuit 60 of the timing control chip 10 recognizes the count value of the counter 30, and according to the count The value transfers the corresponding digital code to the gamma chip 20.
  • the gamma chip 20 generates a gamma voltage according to the digital code to charge the charging area 70 corresponding to the digital code to achieve different brightness differences in the charging area 70; in addition, each group
  • the digital encoding may include and correspond to a plurality of gamma voltages, and can accurately adjust the gamma voltage of the charging region 70 at different distances.
  • both the upper and lower sides of the display panel 80 are provided with data driving chips, which use the bilateral driving method of the data line; or the display panel 80 is only provided with a data driving chip on the upper side or the lower side, using the data line single Side drive mode.
  • This solution can be applied to the data line unilateral drive architecture.
  • the technical difficulty caused by the data line bilateral drive mode and the difficulty in producing production can be avoided, and the increase in manufacturing costs can be avoided, and Increased space occupation; it is also possible to use this data line to drive your architecture on both sides.
  • the bilaterally driven architecture the pixels are located at the farthest place on both sides of the data drive, and there is still a phenomenon of dimmed brightness.
  • the greater the difference from the standard gamma voltage that is, the gamma voltage closest to the charging area of the data drive chip is equivalent to the standard gamma voltage, and in order to offset the loss of the gamma voltage, the farther the charging area corresponds The greater the gamma voltage, the greater the magnitude of the loss is.
  • the gamma chip 20 includes a programmable gamma voltage generating circuit that generates at least two different gamma voltages or a gamma circuit that generates at least two different gamma voltages through a resistor divider, which divides through a resistor Pressure.
  • each gamma chip 20 generates a gamma voltage, and the magnitude of the gamma voltage generated by each gamma chip 20 corresponds to the digital code.
  • each module generates a gamma voltage
  • the magnitude of the gamma voltage generated by each module corresponds to the digital code.
  • the two gamma chip 20 shells cooperatively control each other, reducing the amount of data processed by a single gamma chip 20, which is beneficial to ensure the stability of the gamma chip 20, and
  • the gamma chip 20 has a fast data processing speed, so that the different charging regions 70 can complete the voltage configuration in a short time, which can avoid the abnormality of the display screen.
  • the gamma chip 20 includes at least two data interfaces, and each data interface receives different digital codes and drives the gamma chip 20 to generate different gamma voltages.
  • the gamma chip 20 includes at least two data interfaces, and each data interface receives different digital codes, and drives the gamma chip 20 to generate different gamma voltages, so that different charging regions 70 can obtain different Gamma voltage, the compensation of the gamma voltage between different charging regions 70 is dynamic, so that the brightness of the different charging regions 70 will not differ much, or even eliminate the difference in brightness between the different charging regions 70.
  • a driving method of the display panel 80 including:
  • the display panel 80 is divided into a plurality of charging areas 70 in advance, a unique digital code is determined for each charging area 70, and the corresponding information of the charging area 70 and the digital code is stored in advance to Timing control chip 10;
  • the timing control chip 10 recognizes the count value of the counter, obtains the corresponding digital code from the memory, and outputs the digital code, which is converted into an analog signal by a digital-to-analog circuit; the gamma chip outputs different gamma voltages to drive the digital according to different analog signals Code the charging work of the charging area 70;
  • a driving circuit of a display panel 80 including: a timing control chip 10 provided with a control circuit, a line counter 30 coupled to the control circuit, and a memory; gamma The chip 20 is provided with a digital-to-analog circuit 50; the timing control chip 10 obtains the corresponding digital code from the memory according to the count value of the line counter 30 for output; and the gamma chip 20 outputs the corresponding gamma voltage according to the received digital code.
  • the technical solution of the present application can be widely used in various display panels, such as Twisted Nematic (TN) display panel, In-Plane Switching (IPS) display panel, Vertical Alignment (VA) ) Display panel, multi-quadrant vertical alignment (Multi-Domain Vertical Alignment, MVA) display panel, of course, it can also be other types of display panels, such as organic light-emitting diode (Organic Light-Emitting Diode, OLED) display panel, both The above scheme is applicable.
  • TN Twisted Nematic
  • IPS In-Plane Switching
  • VA Vertical Alignment
  • MVA multi-quadrant vertical alignment
  • OLED Organic Light-Emitting Diode

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Abstract

一种显示面板驱动方法和驱动电路。驱动方法包括：根据与数据驱动芯片的距离远近，预先将显示面板划分为多个充电区域，给每个充电区域确定唯一的编码，并把充电区域和数字编码的对应信息预先存储到时序控制芯片中（S10）；检测待充电像素所在的充电区域，时序控制芯片根据充电区域输出对应的编码（S11）；时序控制芯片将编码输出到伽马芯片，伽马芯片接收数字编码，并根据数字编码输出对应数字编码的伽马电压用于驱动数字编码对应的充电区域的充电工作（S12）。

Description

显示面板的驱动方法和驱动电路
本申请要求于2018年12月3日提交中国专利局，申请号为CN201811465417.X，申请名称为“一种显示面板驱动方法和驱动电路”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，尤其涉及一种显示面板驱动方法和驱动电路。
背景技术
这里的陈述仅提供与本申请有关的背景技术，而不必然地构成现有技术。
随着科技的发展和进步，液晶显示器由于具备机身薄、省电和辐射低等热点而成为显示器的主流产品，得到了广泛应用。市场上的液晶显示器大部分为背光型液晶显示器，其包括液晶面板及背光模组。液晶面板的工作原理是在两片平行的玻璃基板当中放置液晶分子，并在两片玻璃基板上施加驱动电压来控制液晶分子的旋转方向，以将背光模组的光线折射出来产生画面。其中，薄膜晶体管液晶显示器(Thin Film Transistor-Liquid Crystal Display，TFT-LCD)由于具有低的功耗、优异的画面品质以及较高的生产良率等性能，已经逐渐占据了显示领域的主导地位。同样，薄膜晶体管液晶显示器包含液晶面板和背光模组，液晶面板包括彩膜基板(Color Filter Substrate，CF Substrate，也称彩色滤光片基板)、薄膜晶体管阵列基板(Thin Film Transistor Substrate，TFT Substrate)，上述基板的相对内侧存在透明电极。两片基板之间夹一层液晶分子(Liquid Crystal，LC)。
随着液晶电视尺寸越来越大，解析度越来越高，导致在数据线对面板进行 充电的时候，数据线距离数据驱动芯片的近端和远端的充电差异越来越明显，表现为远端充电效果差，亮度较低，近端的部分充电效果较好，亮度较高。
技术解决方案
本申请提供一种显示面板驱动方法和驱动电路，以改善显示面板不良的显示效果。
本申请提供了一种显示面板的驱动方法，包括：
根据与数据驱动芯片的距离远近，预先将显示面板划分为多个充电区域，给每个充电区域确定唯一的数字编码，并把充电区域和数字编码的对应信息预先存储到时序控制芯片中；
检测待充电像素所在的充电区域，时序控制芯片根据充电区域输出对应的数字编码；
时序控制芯片将数字编码输出到伽马芯片，伽马芯片接收数字编码，并根据数字编码输出对应数字编码的伽马电压驱动数字编码对应的充电区域的充电工作。
可选的，所述伽马芯片包括数字转模拟电路；数字编码经数字转模拟电路转换为模拟信号。
可选的，数字编码经数字转模拟电路转换为模拟信号后，包括步骤：
伽马芯片根据不同的模拟信号输出不同的伽马电压进行驱动。
可选的，所述检测待充电像素所在的充电区域，时序控制芯片根据充电区域输出对应的数字编码的步骤包括：
时序控制芯片的计数器计数数据线的行数。
可选的，时序控制芯片的计数器计数数据线的行数后，包括步骤：
时序控制芯片识别计数器的计数值。
可选的，时序控制芯片识别计数器的计数值后，包括步骤：
从存储器中获取对应的数字编码进行输出。
可选的，所述计数器的计数值分为100,200,300,400。
可选的，所述所述计数器的计数值对应不同大小的4组数字编码。
可选的，所述每组数字编码对应伽马电压也是依次增大的。
可选的，所述显示面板的上下两侧部均设置有数据驱动芯片，采用数据线双边驱动方式。
可选的，显示面板仅上侧部或者下侧部设置有数据驱动芯片，采用数据线单边驱动方式。
可选的，距离所述数据驱动芯片越远的充电区域，对应的伽马电压越大。
可选的，所述伽马芯片包括产生至少两个不同的伽马电压的可编程伽马电压生成电路。
可选的，索虎伽马芯片通过电阻分压产生至少两个不同的伽马电压的伽马电路，通过电阻分压产生。
可选的，所述伽马芯片至少设置有两个，每个伽马芯片产生一个伽马电压，且每个所述伽马芯片产生的伽马电压大小与所述数字编码对应。
可选的，所述伽马芯片包括至少两个数据接口。
可选的，每个所述数据接口接收不同的数字编码，并驱动伽马芯片产生不同的伽马电压。
本申请还公开一种显示面板的驱动方法，包括：
根据与数据驱动芯片的距离远近，预先将显示面板划分为多个充电区域，给每个充电区域确定唯一的数字编码，并把充电区域和数字编码的对应信息预 先存储到时序控制芯片中；
时序控制芯片的计数器计数数据线的行数；
时序控制芯片识别计数器的计数值，从存储器中获取对应的数字编码进行输出；数字编码经数字转模拟电路转换为模拟信号；伽马芯片根据不同的模拟信号输出不同的伽马电压驱动数字编码对应的充电区域的充电工作；并使得距离所述数据驱动芯片越远的充电区域，对应的伽马电压越大。
本申请还公开了一种显示面板的驱动电路，使用包括如权利要求所述驱动电路包括：时序控制芯片，设置有控制电路，耦合于所述控制电路的行计数器以及存储器；伽马芯片，设置有数字转模拟电路；所述时序控制芯片根据所述行计数器的计数值，从所述存储器中获取对应的数字编码进行输出；所述伽马芯片根据接收数字编码输出对应的伽马电压。
本方案中，首先时序控制芯片检测充电区域对应的数字编码，然后，伽马芯片接收数字编码，并根据数字编码输出不同的伽马电压到数字编码对应的充电区域，如此，便可以根据充电区域的充电差异，进行伽马电压调节，给偏暗的充电区域以较标准伽马电压高的实际伽马电压，使得对应充电区域的亮度增强，减少甚至消除与其他区域的亮度差异。
附图说明
所包括的附图用来提供对本申请实施例的进一步的理解，其构成了说明书的一部分，示例本申请的实施方式，并与文字描述一起来阐释本申请的原理。显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。在附图中：
图1是本申请实施例一种显示面板驱动方法流程的示意图；
图2是本申请实施例一种显示面板驱动方法流程具体的示意图；
图3是本申请实施例一种显示面板组件的示意图；
图4是本申请实施例一种显示面板驱动电路的示意图；
具体实施方式
这里所公开的具体结构和功能细节仅仅是代表性的，并且是用于描述本申请的示例性实施例的目的。但是本申请可以通过许多替换形式来具体实现，并且不应当被解释成仅仅受限于这里所阐述的实施例。
在本申请的描述中，需要理解的是，术语“中心”、“横向”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。另外，术语“包括”及其任何变形，意图在于覆盖不排他的包含。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普 通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
这里所使用的术语仅仅是为了描述具体实施例而不意图限制示例性实施例。除非上下文明确地另有所指，否则这里所使用的单数形式“一个”、“一项”还意图包括复数。还应当理解的是，这里所使用的术语“包括”和/或“包含”规定所陈述的特征、整数、步骤、操作、单元和/或组件的存在，而不排除存在或添加一个或更多其他特征、整数、步骤、操作、单元、组件和/或其组合。
下面结合附图和实施例对本申请作进一步说明。
如图1至图4所示，本申请实施例公布了一种显示面板80驱动方法，包括步骤：
S10:根据与数据驱动芯片的距离远近，预先将显示面板80划分为多个充电区域70，给每个充电区域70确定唯一的数字编码，并把充电区域70和数字编码的对应信息预先存储到时序控制芯片10中；
S11:检测待充电像素所在的充电区域70，时序控制芯片10根据充电区域70输出对应的数字编码；
S12:时序控制芯片10将数字编码输出到伽马芯片20，伽马芯片20接收数字编码，并根据数字编码输出不同的伽马电压驱动数字编码对应的充电区域70的充电工作。
随着液晶电视尺寸越来越大，解析度越来越高，导致在数据线对面板进行充电的时候，数据线距离数据驱动芯片的近端和远端的充电差异越来越明显，表现为远端充电效果差，亮度较低，近端的部分充电效果较好，亮度较高。本方案中，首先，时序控制芯片10检测充电区域70对应的数字编码，然后，伽马芯片20接收数字编码，并根据数字编码输出不同的伽马电压到数字编码对应的充电区域70，如此，便可以根据充电区域70的充电差异，进行伽马电压调 节，给偏暗的充电区域70以较标准伽马电压高的实际伽马电压，使得对应充电区域70的亮度增强，减少甚至消除与其他区域的亮度差异。
在一实施例中，伽马芯片20包括数字转模拟电路50；数字编码经数字转模拟电路50转换为模拟信号；伽马芯片20根据不同的模拟信号输出不同的伽马电压进行驱动。
本方案中，这样可以在伽马芯片20内省去存储器的同时也避免了伽马芯片20被改写的风险，保证了伽马芯片20输出正确的伽马电压到对应的充电区域70，保证显示面板80不会因为伽马电压不对应造成显示亮度不均匀的情况；另外，伽马芯片20包括数字转模拟电路50，使得该数字编码被识别为模拟信号以驱动伽马芯片20输出不同的伽马电压以对显示面板80各个不同的充电区域70进行抵消差异的驱动。
在一实施例中，检测待充电像素所在的充电区域70，时序控制芯片10根据充电区域70输出对应的数字编码的步骤包括：
时序控制芯片10的计数器计数数据线的行数；
时序控制芯片10识别计数器的计数值，从存储器中获取对应的数字编码进行输出。
本方案中，时序控制芯片10包括行计数器30，由于行计数器30的原理是每完成充电一行计数X加1，而且，扫描线的行数不同，对应的像素距离数据驱动芯片的距离也不同，这样就通过该行数来表示像素远离数据驱动芯片的距离；如此，我们就可以根据需求设计计数X为不同值时的控制方式，具体的，比如，可以将计数X分为四阶，即100,200,300,400，相对应得也有不同大小的4组数字编码，每组数字编码对应伽马电压也是依次增大的；该时序控制芯片10的侦测和控制电路60识行计数器30的计数值，并根据计数值传送对应的 数字编码给伽马芯片20，伽马芯片20根根据数字编码产生伽马电压对于数字编码对应的充电区域70进行充电，实现了不同的充电区域70亮度差异；另外，每一组数字编码里可包括且对应多个伽马电压，可以对远近不同的充电区域70精准的伽马电压调整。
在一实施例中，显示面板80的上下两侧部均设置有数据驱动芯片，采用数据线双边驱动方式；或者显示面板80仅上侧部或者下侧部设置有数据驱动芯片，采用数据线单边驱动方式。
本方案中可以应用于数据线单边驱动架构，如此，便可以避免数据线双边驱动方式带来的技术难度的提升以及对产生生产带来的难度，并避免带来了制造成本的提升，以及空间占用的增加；而采用该数据线双边你驱动的架构也是可以的，双边驱动的架构中，像素位于两侧数据驱动最远的地方，仍然存在亮度偏暗的现象，使用本申请的方法，可以避免该现象的发生，且采用数据线双边驱动的架构，可以减少充电区域划分的数量和难度等，减少对计算难度以及伽马电路的要求；单侧设置数据驱动芯片时，数据线的远端伽马电压最大；双侧设置时，数据线的中部对应的充电区域的伽马电压最大。
在一实施例中，距离数据驱动芯片越远的充电区域70，对应的伽马电压越大。
充电区域70距数据驱动芯片距离越远，由于充电区域70的电阻距离的增大而增大，数据驱动芯片所产生的标准伽马电压损耗越大，进而导致充电区域70随着距离数据驱动芯片的越远亮度越暗；施加一个比标准伽马低电压更大差值的实际伽马电压，如此，距离数据驱动芯片远的充电区域70远且损耗大的可以得到多一些的电压补偿，距离数据驱动芯片远的充电区域70近且损耗小的则少一些电压补偿，在这其中，便可以较好的减少各个充电区域70之间的亮度差 异，甚至消除各个充电区域70之间的亮度差异。或者说与标准伽马电压的差值越大，即最靠近数据驱动芯片的充电区域的伽马电压跟标准的伽马电压相当，而为了抵消伽马电压的损耗，距离越远的充电区域对应的伽马电压越大，增大的幅度与损耗的程度相当。
在一实施例中，伽马芯片20包括产生至少两个不同的伽马电压的可编程伽马电压生成电路或通过电阻分压产生至少两个不同的伽马电压的伽马电路，通过电阻分压产生。
本方案中，不管是可编程伽马电压生成电路或通过电阻分压产生伽马电压的伽马电路，基于本申请都可以实现为不同充电区域70提供不同的实际伽马电压，适用范围广。
在一实施例中，伽马芯片20至少设置有两个，每个伽马芯片20产生一个伽马电压，且每个伽马芯片20产生的伽马电压大小与数字编码对应。
本方案中，伽马芯片20至少设置有两个，每个模块产生一个伽马电压，且每个模块产生的伽马电压大小与数字编码对应。这样，在处理伽马芯片20处理数据量大的时候，两个伽马芯片20壳互相协同控制，减少了单个伽马芯片20处理的数据量，有利于保证伽马芯片20的稳定，且两个伽马芯片20处理数据速度快，使的不同充电区域70在短时间内完成电压配置，可以避免显示画面出现异常。
在一实施例中，伽马芯片20包括至少两个数据接口，每个数据接口接收不同的数字编码，并驱动伽马芯片20产生不同的伽马电压。
本方案中，伽马芯片20包括至少两个数据接口，每个数据接口接收不同的数字编码，并驱动伽马芯片20产生不同的伽马电压，这样可以使的不同的充电区域70获得不同的伽马电压，不同的充电区域70之间的伽马电压补偿的是动 态的，使的不同的充电区域70的亮度不会差异太大，甚至消除不同的充电区域70之间的亮度差异。
在一实施例中，如图2所示，公开了一种显示面板80的驱动方法，包括：
S20:根据与数据驱动芯片的距离远近，预先将显示面板80划分为多个充电区域70，给每个充电区域70确定唯一的数字编码，并把充电区域70和数字编码的对应信息预先存储到时序控制芯片10中；
S21:时序控制芯片10的计数器计数数据线的行数；
S22:时序控制芯片10识别计数器的计数值，从存储器中获取对应的数字编码进行输出数字编码经数字转模拟电路转换为模拟信号；伽马芯片根据不同的模拟信号输出不同的伽马电压驱动数字编码对应的充电区域70的充电工作；
在一实施例中，如图1至4所示，公开了一种显示面板80的驱动电路，包括：时序控制芯片10，设置有控制电路，耦合于控制电路的行计数器30以及存储器；伽马芯片20，设置有数字转模拟电路50；时序控制芯片10根据行计数器30的计数值，从存储器中获取对应的数字编码进行输出；伽马芯片20根据接收数字编码输出对应的伽马电压。
需要说明的是，本方案中涉及到的各步骤的限定，在不影响具体方案实施的前提下，并不认定为对步骤先后顺序做出限定，写在前面的步骤可以是在先执行的，也可以是在后执行的，甚至也可以是同时执行的，只要能实施本方案，都应当视为属于本申请的保护范围。
本申请的技术方案可以广泛用于各种显示面板，如扭曲向列型(Twisted Nematic，TN)显示面板、平面转换型(In-Plane Switching，IPS)显示面板、垂直配向型(Vertical Alignment，VA)显示面板、多象限垂直配向型(Multi-Domain Vertical Alignment，MVA)显示面板，当然，也可以是其他 类型的显示面板，如有机发光二极管(Organic Light-Emitting Diode，OLED)显示面板，均可适用上述方案。
以上内容是结合具体的可选实施方式对本申请所作的进一步详细说明，不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本申请的保护范围。

Claims (20)

  1. 一种显示面板的驱动方法，包括：
    根据与数据驱动芯片的距离远近，预先将显示面板划分为多个充电区域，给每个充电区域确定唯一的数字编码，并把充电区域和数字编码的对应信息预先存储到时序控制芯片中；
    检测待充电像素所在的充电区域，时序控制芯片根据充电区域输出对应的数字编码；以及
    伽马芯片接收数字编码，并根据数字编码输出对应数字编码的伽马电压，以驱动数字编码对应的充电区域的充电工作。
  2. 如权利要求1所述一种显示面板的驱动方法，其中，所述伽马芯片包括数字转模拟电路；
    数字编码经数字转模拟电路转换为模拟信号。
  3. 如权利要求2所述一种显示面板的驱动方法，其中，数字编码经数字转模拟电路转换为模拟信号后，包括步骤；
    伽马芯片根据不同的模拟信号输出不同的伽马电压进行驱动。
  4. 如权利要求1所述一种显示面板的驱动方法，其中，所述检测待充电像素所在的充电区域，时序控制芯片根据充电区域输出对应的数字编码的步骤包括：
    时序控制芯片的计数器计数数据线的行数。
  5. 如权利要求4所述一种显示面板的驱动方法，其中，时序控制芯片的计数器计数数据线的行数后，包括步骤：
    时序控制芯片识别计数器的计数值。
  6. 如权利要求4所述一种显示面板的驱动方法，其中，时序控制芯片识别计数器的计数值后，包括步骤：
    从存储器中获取对应的数字编码进行输出。
  7. 如权利要求6所述一种显示面板的驱动方法，其中，所述计数器的计数值分为100,200,300,400。
  8. 如权利要求7所述一种显示面板的驱动方法，其中，所述所述计数器的计数值对应不同大小的4组数字编码。
  9. 如权利要求8所述一种显示面板的驱动方法，其中，所述每组数字编码对应伽马电压也是依次增大的。
  10. 如权利要求1所述一种显示面板的驱动方法，其中，所述显示面板的上下两侧部均设置有数据驱动芯片，采用数据线双边驱动方式。
  11. 如权利要求10所述一种显示面板的驱动方法，其中，所述显示面板仅上侧部或者下侧部设置有数据驱动芯片，采用数据线单边驱动方式。
  12. 如权利要求1所述一种显示面板的驱动方法，其中，距离所述数据驱动芯片越远的充电区域，对应的伽马电压越大。
  13. 如权利要求1所述一种显示面板的驱动方法，其中，所述伽马芯片包括产生至少两个不同的伽马电压的可编程伽马电压生成电路。
  14. 如权利要求13所述一种显示面板的驱动方法，其中，所述伽马芯片通过电阻分压产生至少两个不同的伽马电压的伽马电路，通过电阻分压产生。
  15. 如权利要求14所述一种显示面板的驱动方法，其中，所述伽马芯片至少设置有两个，每个伽马芯片产生一个伽马电压。
  16. 如权利要求15所述一种显示面板的驱动方法，其中，且每个所述伽马 芯片产生的伽马电压大小与所述数字编码对应。
  17. 如权利要求14所述一种显示面板的驱动方法，其中，所述伽马芯片包括至少两个数据接口。
  18. 如权利要求17所述一种显示面板的驱动方法，其中，每个所述数据接口接收不同的数字编码，并驱动伽马芯片产生不同的伽马电压。
  19. 一种显示面板的驱动方法，包括：
    根据与数据驱动芯片的距离远近，预先将显示面板划分为多个充电区域，给每个充电区域确定唯一的数字编码，并把充电区域和数字编码的对应信息预先存储到时序控制芯片中；
    时序控制芯片的计数器计数数据线的行数；以及
    时序控制芯片识别计数器的计数值，从存储器中获取对应的数字编码进行输出；数字编码经数字转模拟电路转换为模拟信号；伽马芯片根据不同的模拟信号输出不同的伽马电压驱动数字编码对应的充电区域的充电工作；
    并使得距离所述数据驱动芯片越远的充电区域，对应的伽马电压越大。
  20. 一种显示面板的驱动电路，包括：
    时序控制芯片，设置有控制电路，耦合于所述控制电路的行计数器以及存储器；
    伽马芯片，设置有数字转模拟电路；
    所述时序控制芯片根据所述行计数器的计数值，从所述存储器中获取对应的数字编码进行输出；
    所述伽马芯片根据接收数字编码输出对应的伽马电压。
PCT/CN2018/121012 2018-12-03 2018-12-14 显示面板的驱动方法和驱动电路 WO2020113653A1 (zh)

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