WO2020087575A1 - 一种显示面板的驱动方法、其驱动装置和显示装置 - Google Patents

一种显示面板的驱动方法、其驱动装置和显示装置 Download PDF

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WO2020087575A1
WO2020087575A1 PCT/CN2018/115608 CN2018115608W WO2020087575A1 WO 2020087575 A1 WO2020087575 A1 WO 2020087575A1 CN 2018115608 W CN2018115608 W CN 2018115608W WO 2020087575 A1 WO2020087575 A1 WO 2020087575A1
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square wave
time
display panel
data
data line
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French (fr)
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郭东胜
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HKC Co Ltd
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HKC Co Ltd
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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
    • 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
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0871—Several active elements per pixel in active matrix panels with level shifting
    • 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
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0289—Details of voltage level shifters arranged for use in a driving circuit
    • 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
    • G09G2310/0291—Details of output amplifiers or buffers arranged for use in a driving circuit
    • 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
    • G09G2320/0223—Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

Definitions

  • the present application relates to the field of display technology, and in particular, to a driving method of a display panel, a driving device thereof, and a display device.
  • Flat panel displays include thin film transistor liquid crystal displays (Thin Film Transistor-Liquid Crystal (TFT-LCD) and organic light-emitting diode (Organic Light-Emitting Diode, OLED) displays, etc.
  • TFT-LCD Thi Film Transistor-Liquid Crystal
  • OLED Organic Light-Emitting Diode
  • the thin film transistor liquid crystal display controls the rotation direction of the liquid crystal molecules to refract the light of the backlight module to generate a picture, which has many advantages such as thin body, power saving, no radiation and so on.
  • the organic light emitting diode display is made of organic electroluminescent diodes, and has many advantages such as self-luminescence, short response time, high definition and contrast, flexible display and large-area full-color display.
  • the purpose of the present application is to provide a driving method of a display panel, a driving device thereof and a display device which can save the area of the chip and the manufacturing cost of the display panel.
  • the present application provides a driving method for a display panel, which includes the steps of: receiving driving data corresponding to each channel; performing square wave conversion on the driving data to obtain a data line signal; and outputting a data line corresponding to each channel The signal is transmitted to the corresponding data line on the display panel; data driving is performed on the display panel;
  • the high level of the square wave signal generated corresponding to different grayscale conversions in the driving data is the same, and the output time of the high level is different.
  • This application also discloses a driving device for a display panel, which includes: a receiver that receives driving data corresponding to each channel; a square wave conversion chip that converts the driving data to a square wave to obtain a data line signal; and an output device that outputs each The data line signal corresponding to each channel is transmitted to the corresponding data line on the display panel; data driving is performed on the display panel;
  • the high level of the square wave signal generated by the corresponding grayscale conversion in the driving data is the same, and the output time of the high level is different.
  • the present application also discloses a display device comprising: a display panel and the above-mentioned driving device. After receiving a set of data signals, the driving device outputs a set of data line signals through conversion and transmits the set of data line signals to the Describe a set of corresponding data lines on the display panel; control the display state of the display panel, and drive the display device with data.
  • the digital-to-analog conversion method uses a digital-to-analog conversion circuit
  • this application does not use the method of digital-to-analog conversion, but uses the method of square wave conversion, that is, the generated high level of the square wave signal is the same, and the high level output
  • the time is different; because the high level of the square wave conversion method is constant, only a set of maximum cross-voltage reference voltage is required to control, which greatly saves the design requirements of the peripheral circuit, saves the chip area, and saves the production of the display panel Cost; there is no need to change the high level value, only need to control the duration of the high level, which makes the operation more convenient; in the actual operation process, the level can be low level first, then high level, first discharge a low At
  • FIG. 1 is a schematic diagram of driving a display panel according to an embodiment of the present application.
  • 2a-b are schematic diagrams of pixel charging waveforms of a display panel according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of another display panel driving according to an embodiment of the present application.
  • 4a-b are schematic diagrams of pixel charging waveforms of another display panel according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a square wave change of a display panel according to an embodiment of the present application.
  • FIG. 6 is a pixel waveform change diagram of a display panel according to an embodiment of the present application.
  • FIG. 7 is an application flowchart of a method for driving a display panel according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a driving device for a display panel according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a display device 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.
  • installation 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.
  • the control method of the LCD panel displaying various gray levels mainly depends on the size of the voltage to control the display of brightness, and the voltage corresponding to each data is calculated by the internal voltage of the source driver
  • Figure 1 is an undisclosed source driver chip (Source Drier IC) internal architecture. After receiving the data of each channel (CH1, CH2 ... CHn), they are respectively subjected to level shift (level shift)-> digital-to-analog conversion (DAC)-> amplifier (OP) to generate the output voltage (VCH1) of each channel , VCH2 ... VCHn), where the digital-to-analog conversion (DAC) is the part that occupies the largest area.
  • T is the charging time of each row of pixels
  • Th is the total time of one row
  • the output of the gate determines the output.
  • an embodiment of the present application discloses a driving method of a display panel, which includes the steps of: S71: receiving driving data corresponding to each channel; S72: performing square wave conversion on the driving data to obtain a data line Signal; S73: output the data line signal corresponding to each channel and transmit it to the corresponding data line on the display panel; perform data driving on the display panel; wherein, the square wave conversion is performed on the driving data to obtain a data line signal
  • the high level of the square wave signal generated by the conversion of different gray levels in the driving data is the same, and the output time of the high level is different.
  • the method used by the digital-to-analog conversion is complex and occupies a large area of the chip.
  • the digital-to-analog conversion method is not used, but the square wave conversion method is used, that is, the generated high level of the square wave signal is the same, and The time of high-level output is different; because the high-level of the square wave conversion method is constant, only a set of reference voltages with maximum cross-voltage are required to control, which greatly saves the design requirements of peripheral circuits, saves the area of the chip, and saves The production cost of the display panel; there is no need to change the high level value, just control the duration of the high level, making the operation more convenient.
  • a high-level output of the square wave signal generated by different gray-scale conversions is queried from a preset square wave look-up table After time, square wave conversion is performed on the drive data to obtain the data line signal.
  • the square wave look-up table is used, because The target gray scale is different, and the output time of different target gray scales is different high-level output by using the square wave lookup table; through the conversion of the square wave lookup table, you can find the high Level output time, in order to achieve the best display effect, replace the method of digital-to-analog conversion, save the area of the chip on the display panel; at the same time, because the high level of the square wave conversion method is constant, only a set of maximum cross-voltage Controlled by the reference voltage, which greatly saves the design requirements of the peripheral circuit and the manufacturing cost of the display panel.
  • the square wave look-up table stores: the target gray-scale voltage value, and the corresponding square wave width time as a parameter; there is a time interval between the high-level output time and the switch-on time.
  • the time interval is the square wave width time;
  • the step of querying from the preset square wave lookup table includes: according to the target gray-scale voltage value, querying and outputting the corresponding square wave width time in the square wave lookup table, after calculating the time of high level output, the driver The data is square wave converted to obtain the data line signal.
  • the square wave look-up table takes full consideration of the gray-scale value and high-level information, the time corresponding to the high-level output of the square wave look-up table is used to meet the target requirements; the square wave is guaranteed When converting, use the square wave look-up table to query the corresponding high-level output time, in line with the overall concept of this application, and convert the best solution that meets the target target gray-scale voltage value, and then use this method to improve the square wave conversion Process, replacing the data conversion method, saving chip area and saving the design requirements of the peripheral circuit, saving the manufacturing cost of the display panel.
  • the square wave lookup table stores: the target gray-scale voltage value, and the corresponding square wave width time and reset time as parameters; the time of the high level output and the switch on time exist Interval, the time interval is the sum of square wave width time and reset time;
  • the step of querying from the preset square wave lookup table includes: according to the target grayscale voltage value, querying the square wave width and reset time corresponding to the output in the square wave lookup table, the reset time determines the start of the high level output At the beginning time, the width of the square wave determines the duration of the high level. After calculating the time for the high level output, the drive data is converted into a square wave to obtain the data line signal.
  • a square wave look-up table is adopted; The conversion of the square wave look-up table can find the time that meets the low level output that can drive the target gray scale to achieve the best display effect.
  • the step of converting the drive data to the square wave to obtain the data line signal includes: logic operation: setting the signal (POL) by inverting the polarity Determine the gray-scale voltage value to obtain a square wave waveform, and then reverse the square wave to obtain an output logic waveform, and generate a data line signal according to the logic waveform.
  • the logic waveform is obtained through rigorous logic operation, and the logic waveform is used to ensure that the output logic waveform is accurate and the data line signal that meets the target gray level is obtained, making The program has a better implementation effect.
  • the logic waveform obtained after performing logic calculation is amplified by a level conversion and an amplifier to the data line signal.
  • the output drive data is not enough to drive the change of gray scale alone; the output drive voltage is amplified by level conversion to achieve the output square
  • the high level of the wave signal can smoothly drive the purpose of gray scale.
  • a driving device 100 for a display panel including: a receiver 200 to receive driving data corresponding to each channel; a square wave conversion chip 300 to drive data Square wave conversion is performed to obtain a data line signal; the output device 400 outputs the data line signal corresponding to each channel and transmits it to the corresponding data line on the display panel; data driving the display panel; wherein, the square wave conversion In the chip 300, the high level of the square wave signal generated corresponding to different grayscale conversions in the driving data is the same, and the output time of the high level is different.
  • the method used by the digital-to-analog conversion Digital-to-analog conversion circuit is complex and occupies a large area of the chip.
  • the square-wave conversion chip 300 is used instead of the digital-analog conversion method.
  • the square wave conversion chip 300 includes a square wave look-up table that stores: the target gray-scale voltage value, and the corresponding square wave width time and reset time as parameters; the high There is a time interval between the level output time and the switch on time, and the time interval is the sum of the square wave width time and the reset time;
  • the square wave width time and reset time corresponding to the output in the square wave lookup table query the square wave width time and reset time corresponding to the output in the square wave lookup table.
  • the reset time determines the start time of the high level output
  • the square wave width time determines the duration of the high level.
  • the square wave look-up table is used, because The target gray scale is different, and the different target gray scales are queried by using the square wave lookup table to output different high-level output time; through the conversion of the square wave lookup table, you can find the high Level output time, in order to achieve the best display effect, replace the method of digital-to-analog conversion, save the area of the chip on the display panel; at the same time, because the high level of the square wave conversion method is constant, only a set of maximum cross-voltage Is controlled by the reference voltage, which greatly saves the design requirements of the peripheral circuit and the manufacturing cost of the display panel; because the square wave look-up table takes full consideration of the gray scale value and high-level information, it is used to query the square wave The time of the corresponding high level output of the table output meets the target requirements; when the square wave
  • the square wave conversion chip 300 includes a logic calculation chip, a level shifter, and an amplifier.
  • the logic calculation chip includes an inverter. The inverter reverses the waveform and then The operation is performed in parallel to obtain the output logic waveform, and the level shifter and the amplifier amplify the logic waveform to obtain the data line signal.
  • the logic waveform is obtained through rigorous logic operation, and the logic waveform is used to ensure that the output logic waveform is accurate and the data line signal that meets the target gray level is obtained, making The program has a better implementation effect.
  • the output drive data is not sufficient to drive the change of gray scale alone; the output drive voltage is amplified by the level shifter to reach the high square wave signal output The level can smoothly drive the purpose of gray scale.
  • a display device which includes a display panel and the above-mentioned driving device. After receiving a set of data signals, the driving device outputs a set of data lines through conversion Signal, and transmit this set of data line signals to a corresponding set of data lines on the display panel; control the display state of the display panel, and drive the display device data.
  • the driving device 100 converts a set of received data signals to output a set of data line signals to a corresponding set of data lines on the display screen, so that the driving device 100 can strictly control the display screen 600
  • the purpose of the display state is to ensure that under the driving of the driving device 100, the display of the display screen 600 can reach a better state.
  • this scheme uses positive drive 127 gray scale (T127) and negative drive negative 127 gray scale (T127 ') and positive drive 0 gray scale (T0) and reverse drive.
  • Negative 0 gray scale (T0 ') driven in the negative direction is used as an example to illustrate the specific implementation content, but the actual operation process includes but is not limited to 0 gray scale and 127 gray scale.
  • TFT-LCD Thin Film Transistor-Liquid Crystal
  • OLED Organic Light-Emitting Diode

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

一种显示面板的驱动方法、驱动装置（100）和显示装置（500），包括：驱动数据进行方波转换，得到数据线信号（S72），对应驱动数据中不同灰阶转换生成的方波信号高电平相同，高电平输出时间不同。

Description

一种显示面板的驱动方法、其驱动装置和显示装置
本申请要求于2018年10月29日提交中国专利局、申请号为CN201811267637.1、发明名称为“一种显示面板的驱动方法、其驱动装置和显示装置”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的驱动方法、其驱动装置和显示装置。
背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成现有技术。
随着科技的发展和进步，平板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。平板显示器包括薄膜晶体管液晶显示器(Thin Film Transistor-Liquid Crystal Display，TFT-LCD)和有机发光二极管(Organic Light-Emitting Diode，OLED)显示器等。其中，薄膜晶体管液晶显示器通过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，具有机身薄、省电、无辐射等众多优点。而有机发光二极管显示器是利用有机电致发光二极管制成，具有自发光、响应时间短、清晰度与对比度高、可实现柔性显示与大面积全色显示等诸多优点。
在显示面板的灰阶控制方式中，数模转换占据了芯片的绝大部分面积，且增加显示面板的制造成本。
技术解决方案
本申请的目的是提供一种可以节约芯片的面积，和节省显示面板的制作成本的一种显示面板的驱动方法、其驱动装置和显示装置。
为实现上述目的，本申请提供了一种显示面板的驱动方法，包括步骤： 接收每个通道对应的驱动数据；对驱动数据进行方波转换，得到数据线信号；输出每个通道对应的数据线信号，传输给所述显示面板上对应的数据线；对显示面板进行数据驱动；
其中，所述的对驱动数据进行方波转换，得到数据线信号的步骤中，对应驱动数据中不同灰阶转换生成的方波信号的高电平相同，高电平输出的时间不同。
本申请还公开了一种显示面板的驱动装置，包括：接收器，接收每个通道对应的驱动数据；方波转换芯片，对驱动数据进行方波转换，得到数据线信号；输出器，输出每个通道对应的数据线信号，传输给所述显示面板上对应的数据线；对显示面板进行数据驱动；
其中，所述方波转换芯片中，对应驱动数据中不同灰阶转换生成的方波信号的高电平相同，高电平输出的时间不同。
本申请还公开了一种显示装置，包括：显示面板和上述驱动装置，所述驱动装置接收一组数据信号后，通过转换，输出一组数据线信号，并将这组数据线信号传输给所述显示面板上的一组对应的数据线；控制显示面板的显示状态，对显示装置进行数据驱动。
相对于利用数模转换出不同的电平，即生成的信号的高电平不同，而高电平持续的时间相同，来达到数据驱动的目的，数模转换的方法所用到的数模转换电路复杂，占据芯片的面积较大的方案来说，本申请，未利用数模转换的方式，而是采用方波转换的方式，即生成的方波信号的高电平相同，而高电平输出的时间不同；因为采用方波转化方法的高电平恒定，只需一组最大跨压的参考电压来控制，大大节约了外围电路的设计需求，节约了芯片的面积，节省了显示面板的制作成本；不必更改高电平值，只需控制高电平持续的时间，使得操作更加简便；在实际操作过程中，电平可以是先是低电平，后是高电平，先放电放一个低于所需的电压，后通过高电平充电，充电至所需的电压。
附图说明
所包括的附图用来提供对本申请实施例的理解，其构成了说明书的一部分，用于例示本申请的实施方式，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的驱动示意图；
图2a-b是本申请实施例一种显示面板的像素充电波形的示意图；
图3是本申请实施例另一种显示面板的驱动的示意图；
图4a-b是本申请实施例另一种显示面板的像素充电波形的示意图；
图5是本申请实施例一种显示面板的方波变化的示意图；
图6是本申请实施例一种显示面板的像素波形变化图；
图7是本申请实施例一种显示面板的驱动方法的应用流程图；
图8是本申请实施例一种显示面板的驱动装置的结构示意图；
图9是本申请实施例一种显示装置的结构示意图。
本申请的实施方式
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。
发明人知晓的一种方法是：液晶显示面板显示各种灰阶的控制方式主要依靠电压的大小来控制亮度的显示，而每个数据对应的电压，通过电压的方式，源极驱动器内部进行数模转换(DAC)的处理，但是数模转换(DAC)占用了源极驱动器的源极驱动芯片的绝大部分的面积设计如图1所示，为一种未公开的源极驱动芯片(Source Drier IC)内部架构。每一个通道(CH1、CH2…CHn)的数据接收后，均分别经过电平转换(level shift)->数模转换(DAC)->放大器(OP)，才能产生每个通道的输出电压(VCH1、VCH2…VCHn)，其中数模转换(DAC)是占据面积最大的部分，数模转换(DAC)用的模拟电路进行的设计，且数据的N bit越大，面积就会越大。
如图2a-b所示，以8bit的显示为例，T为每一行像素的充电时间，Th为一行的总时间，有栅极的输出决定，当源极的芯片输出对应0～255灰阶的电压波形时，对应的像素的充电波形，像素充电的会有变换会有一定的时间。
下面结合附图和实施例对本申请作说明。
如图3至图7所示，本申请实施例公布了一种显示面板的驱动方法，包括步骤：S71：接收每个通道对应的驱动数据；S72：对驱动数据进行方波转换，得到数据线信号；S73：输出每个通道对应的数据线信号，传输给所述显示面板上对应的数据线；对显示面板进行数据驱动；其中，所述的对驱动数据进行方波转换，得到数据线信号的步骤中，对应驱动数据中不同灰阶转换生成的方波信号的高电平相同，高电平输出的时间不同。
本方案中，相对于利用数模转换出不同的电平，即生成的信号的高电平不同，而高电平持续的时间相同，来达到数据驱动的目的，数模转换的方法所用到的数模转换电路复杂，占据芯片的面积较大的方案来说，本申请，未利用数模转换的方式，而是采用方波转换的方式，即生成的方波信号的高电平相同，而高电平输出的时间不同；因为采用方波转化方法的高电平恒定，只需一组最大跨压的参考电压来控制，大大节约了外围电路的设计需求，节约了芯片的面积，节省了显示面板的制作成本；不必更改高电平值，只需控制高电平持续的时间，使得操作更加简便。
在一实施例中，所述对驱动数据进行方波转换，得到数据线信号的步骤中，从预设的方波查询表中查询得出不同灰阶转换生成的方波信号高电平输出的时间后，对驱动数据进行方波转换，得到数据线信号。
表一方波查询表
Figure PCTCN2018115608-appb-000001
本方案中，为了使得不同的灰阶值和不同灰阶转换生成的方波信号高电平输出的时间可以更好的互相转换而保证显示面板的驱动稳定，因而采用了方波查询表，由于目标灰阶的不同，而将不同的目标灰阶通过使用方波查询表查询输出为不同的高电平输出的时间；透过方波查询表的换算，可以找到符合能驱动目标灰阶的高电平输出的时间，以达到最佳的显示效果，替代数模转换的方法，节约显示面板上的芯片的面积；同时因为采用方波转化方法的高电平恒定，只需一组最大跨压的参考电压来控制，大大 节约了外围电路的设计需求，节约了显示面板的制造成本。
在一实施例中，所述方波查询表，存储有：目标灰阶电压值，及对应的方波宽度时间作为参数；所述高电平输出的时间与开关的开启时间存在时间间隔，所述时间间隔为方波宽度时间；
所述从预设的方波查询表中查询的步骤包括：根据目标灰阶电压值，在方波查询表中查询输出对应的方波宽度时间，计算出高电平输出的时间后，对驱动数据进行方波转换，得到数据线信号。
本方案中，由于该方波查询表充分考虑了灰阶值，高电平的信息而生成，因而使用该方波查询表输出的对应高电平输出的时间，符合目标要求；保证了方波转换时，使用方波查询表查询输出的对应高电平输出的时间，符合本申请的整体构思，转换出符合目标目标灰阶电压值的最佳解，进而通过采用此方法，完善方波转换的过程，替换掉数据转化方法，节约芯片面积和节省了外围电路的设计需求，节约显示面板的制作成本。
在一实施例中，所述方波查询表，存储有：目标灰阶电压值，及对应的方波宽度时间和复位时间作为参数；所述高电平输出的时间与开关的开启时间存在时间间隔，所述时间间隔为方波宽度时间与复位时间之和；
所述从预设的方波查询表中查询的步骤包括：根据目标灰阶电压值，在方波查询表中查询输出对应的方波宽度时间和复位时间，复位时间确定高电平输出的起始时间，方波宽度时间确定高电平的持续时间，计算出高电平输出的时间后，对驱动数据进行方波转换，得到数据线信号。
本方案中，为了使得不同的灰阶值和不同灰阶转换生成的方波信号低电平输出的时间可以更好的互相转换而保证显示面板的驱动稳定，因而采用了方波查询表；通过方波查询表的换算，可以找到符合可以驱动目标灰阶的低电平输出的时间，以达到最佳的显示效果，替代数模转换的方法，节约显示面板上的芯片的面积；在方波查询表中通过对方波宽度时间和复位时间的查询，而查询输出对应不同的灰阶值的不同的低电平输出的时间，因为像素内部的上一帧有残留电压，而通过在复位时间方波信号电平复位到最高电平或者最低电平，可以避免像素上一帧内部的残留电压对充电时间的影响，使得方波查询表的对应更加精准；同时因为采用方波转化方法的高电平恒定，只需一组最大跨压的参考电压来控制，大大节约了外围电路的设计需求，节约了显示面板的制造成本；本方案中的方波宽度时间存储的是延迟时间，延迟时间作为记录在方波查询表里的时候，可以以某基 础时钟周期T为单位的是方波宽度时间的数字。
在一实施例中，所述获得方波信号高电平输出的时间后，对驱动数据进行方波转换，得到数据线信号的步骤包括：逻辑运算：通过极性反转设定信号(POL)对灰阶电压值进行判断，得到方波波形，再将方波反向，得到输出的逻辑波形，根据所述的逻辑波形生成数据线信号。
本方案中，获得方波信号高电平输出的时间后，通过严谨的逻辑运算得到输出的逻辑波形，通过逻辑计算，确保输出的逻辑波形准确无误，得到符合目标灰度的数据线信号，使得方案得到更佳的实施效果。
在一实施例中，所述对驱动数据进行方波转换，得到数据线信号的步骤中，进行逻辑计算后得到的逻辑波形，通过电平转换和放大器进行放大，到所述的数据线信号。本方案中，当通过逻辑计算后得到的方波信号高电平的电位较小时，所输出的驱动数据不足以单独驱动灰阶的变化；通过电平转换放大输出的驱动电压以达到输出的方波信号高电平可以顺利驱动灰阶的目的。
如图3所示，若将源极的波形，减少T127的时间，当电压爬升到V127的电压值时，刚好对应栅极关闭，此时变可以让像素电压维持在V127的电压位置，进而得到对应的127灰阶的显示，同理，减少T0的时间的时候，可以得到0灰阶的V0电压。
作为本申请的另一实施例，参考图7所示，公开了一种显示面板的驱动装置100，包括：接收器200，接收每个通道对应的驱动数据；方波转换芯片300，对驱动数据进行方波转换，得到数据线信号；输出器400，输出每个通道对应的数据线信号，传输给所述显示面板上对应的数据线；对显示面板进行数据驱动；其中，所述方波转换芯片300中，对应驱动数据中不同灰阶转换生成的方波信号的高电平相同，高电平输出的时间不同。
本方案中，相对于利用数模转换出不同的电平，即生成的信号的高电平不同，而高电平持续的时间相同，来达到数据驱动的目的，数模转换的方法所用到的数模转换电路复杂，占据芯片的面积较大的方案；本申请，通过接收器200，接收到每个通道对应的驱动数据后，未利用数模转换的方式，而是采用方波转换芯片300，使生成的方波信号的高电平相同，而高电平输出的时间不同；因为方波转换芯片的高电平恒定，只需一组最大跨压的参考电压来控制，所以大大节约了外围电路的设计需求，节约了芯片的 面积，节省了显示面板的制作成本；不必更改高电平值，只需控制高电平持续的时间，使得操作更加简便。
在一实施例中，所述方波转换芯片300包括方波查询表，所述方波查询表储存有：目标灰阶电压值，及对应的方波宽度时间和复位时间作为参数；所述高电平输出的时间与开关的开启时间存在时间间隔，所述时间间隔为方波宽度时间与复位时间之和；
根据目标灰阶电压值，在方波查询表中查询输出对应的方波宽度时间和复位时间，复位时间确定高电平输出的起始时间，方波宽度时间确定高电平的持续时间，计算出高电平输出的时间后，对驱动数据进行方波转换，得到数据线信号。
本方案中，为了使得不同的灰阶值和不同灰阶转换生成的方波信号高电平输出的时间可以更好的互相转换而保证显示面板的驱动稳定，因而采用了方波查询表，由于目标灰阶的不同，而将不同的目标灰阶通过使用方波查询表查询输出为不同的高电平输出的时间；透过方波查询表的换算，可以找到符合可以驱动目标灰阶的高电平输出的时间，以达到最佳的显示效果，替代数模转换的方法，节约显示面板上的芯片的面积；同时因为采用方波转化方法的高电平恒定，只需一组最大跨压的参考电压来控制，大大节约了外围电路的设计需求，节约了显示面板的制造成本；由于该方波查询表充分考虑了灰阶值，高电平的信息而生成，因而使用该方波查询表输出的对应高电平输出的时间，符合目标要求；保证了方波转换时，使用方波查询表查询输出的对应高电平输出的时间，可以符合本申请的整体构思，转换出符合目标目标灰阶电压值的最佳解，进而通过采用此方法，完善方波转换的过程，替换掉数据转化方法，节约芯片面积和节省了外围电路的设计需求，节约显示面板的制作成本。
在一实施例中，所述方波转换芯片300包括逻辑计算芯片、电平转换器和放大器，所述逻辑计算芯片包括反相器，所述反相器将波形进行反向，再与高电平进行运算，得到输出的逻辑波形，所述电平转换器和放大器将逻辑波形进行放大，得到所述的数据线信号。
本方案中，获得方波信号高电平输出的时间后，通过严谨的逻辑运算得到输出的逻辑波形，通过逻辑计算，确保输出的逻辑波形准确无误，得到符合目标灰度的数据线信号，使得方案得到更佳的实施效果。当通过逻辑计算后得到的方波信号高电平的电位较小时，所输出的驱动数据不足以 单独驱动灰阶的变化；通过电平转换器放大输出的驱动电压以达到输出的方波信号高电平可以顺利驱动灰阶的目的。
作为本申请的另一实施例，参考图8所示，公开了一种显示装置，包括：显示面板和上述驱动装置，所述驱动装置接收一组数据信号后，通过转换，输出一组数据线信号，并将这组数据线信号传输给所述显示面板上的一组对应的数据线；控制显示面板的显示状态，对显示装置进行数据驱动。
本方案中，驱动装置100将接收到的一组数据信号，通过转换，输出一组数据线信号到显示屏上的一组对应的数据线，以达到驱动装置100可以严格的控制显示屏600的显示状态的目的，确保在驱动装置100的驱动下，显示屏600的显示可以达到较佳的状态。
在附图中本方案以正向驱动的127灰阶(T127)和反转后的负向驱动的负127灰阶(T127’)以及正向驱动的0灰阶(T0)和反转后的负向驱动的负0灰阶(T0’)为例来说明具体实施内容，但在实际操作过程中包括但不限于0灰阶和127灰阶。
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应用于薄膜晶体管液晶显示器(Thin Film Transistor-Liquid Crystal Display，TFT-LCD)和机发光二极管(Organic Light-Emitting Diode，OLED)显示器等平板显示器。
以上内容是结合具体可选的实施方式对本申请所作的详细说明，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 (17)

  1. 一种显示面板的驱动方法，包括步骤：
    接收每个通道对应的驱动数据；
    对驱动数据进行方波转换，得到数据线信号；以及
    输出每个通道对应的数据线信号，传输给所述显示面板上对应的数据线；对显示面板进行数据驱动；
    其中，所述的对驱动数据进行方波转换，得到数据线信号的步骤中，对应驱动数据中不同灰阶转换生成的方波信号的高电平相同，高电平输出的时间不同。
  2. 如权利要求1所述的一种显示面板的驱动方法，其中，所述对驱动数据进行方波转换，得到数据线信号的步骤中，从预设的方波查询表中查询得出不同灰阶转换生成的方波信号高电平输出的时间后，对驱动数据进行方波转换，得到数据线信号。
  3. 如权利要求2所述的一种显示面板的驱动方法，其中，所述方波查询表，存储有：目标灰阶电压值，及对应的方波宽度时间作为参数；所述高电平输出的时间与开关的开启时间存在时间间隔，所述时间间隔为方波宽度时间。
  4. 如权利要求3所述的一种显示面板的驱动方法，其中，所述从预设的方波查询表中查询的步骤包括：根据目标灰阶电压值，在方波查询表中查询输出对应的方波宽度时间，计算出高电平输出的时间后，对驱动数据进行方波转换，得到数据线信号。
  5. 如权利要求2所述的一种显示面板的驱动方法，其中，所述方波查询表，存储有：目标灰阶电压值，及对应的方波宽度时间和复位时间作为参数；所述高电平输出的时间与开关的开启时间存在时间间隔，所述时间间隔为方波宽度时间与复位时间之和。
  6. 如权利要求5所述的一种显示面板的驱动方法，其中，所述从预设的方波查询表中查询的步骤包括：根据目标灰阶电压值，在方波查询表中查询输出对应的方波宽度时间和复位时间，复位时间确定高电平输出的起始时间，方波宽度时间确定高电平的持续时间，计算出高电平输出的时间后，对驱动数据进行方波转换，得到数据线信号。
  7. 如权利要求2所述的一种显示面板的驱动方法，其中，所述获得方波信号高电平输出的时间后，对驱动数据进行方波转换，得到数据线信号的步骤包括：
    逻辑运算：通过极性反转设定信号对灰阶电压值进行判断，得到方波波形，再将方波反向，得到输出的逻辑波形，根据所述的逻辑波形生成数据线信号。
  8. 如权利要求6所述的一种显示面板的驱动方法，其中，所述对驱动数据进行方波转换，得到数据线信号的步骤中，进行逻辑计算后得到的逻辑波形
  9. 如权利要求8所述的一种显示面板的驱动方法，其中，将逻辑计算后得到的逻辑波形进行电平转换，得到转换后的方波波形。
  10. 如权利要求9所述的一种显示面板的驱动方法，其中，将进行电平转换后得到的方波波形通过放大器进行放大，到所述的数据线信号。
  11. 一种显示面板的驱动装置，包括：
    接收器，接收每个通道对应的驱动数据；
    方波转换芯片，对驱动数据进行方波转换，得到数据线信号；以及
    输出器，输出每个通道对应的数据线信号，传输给所述显示面板上对应的数据线；对显示面板进行数据驱动；
    其中，所述方波转换芯片中，对应驱动数据中不同灰阶转换生成的方波信号的高电平相同，高电平输出的时间不同。
  12. 如权利要求11所述的一种显示面板的驱动装置，其中，所述方波转换芯片包括方波查询表，所述方波查询表储存有：目标灰阶电压值，及对应的方波宽度时间和复位时间作为参数；所述高电平输出的时间与开关的开启时间存在时间间隔，所述时间间隔为方波宽度时间与复位时间之和。
  13. 如权利要求12所述的一种显示面板的驱动装置，其中，根据目标灰阶电压值，在方波查询表中查询输出对应的方波宽度时间和复位时间，复位时间确定高电平输出的起始时间，方波宽度时间确定高电平的持续时间，计算出高电平输出的时间后，对驱动数据进行方波转换，得到数据线信号。
  14. 如权利要求8所述的一种显示面板的驱动装置，其中，所述方波转换芯片包括逻辑计算芯片，所述逻辑计算芯片包括反相器，所述反相器将波形进行反向，再与高电平进行运算，得到输出的逻辑波形。
  15. 如权利要求14所述的一种显示面板的驱动装置，其中，所述方波转换芯片电平转换器，所述电平转换器将逻辑波形进行转换，得到转换后的方波波形。
  16. 如权利要求15所述的一种显示面板的驱动装置，其中，所述方波转换芯片包括放大器，所述放大器将通过电平转换器而得到的方波波形进行放大，得到所述的数据线信号。
  17. 一种显示装置，包括：显示面板和驱动装置，所述驱动装置包括：
    接收器，接收每个通道对应的驱动数据；
    方波转换芯片，对驱动数据进行方波转换，得到数据线信号；以及
    输出器，输出每个通道对应的数据线信号，传输给所述显示面板上对应的数据线；对显示面板进行数据驱动；
    其中，所述方波转换芯片中，对应驱动数据中不同灰阶转换生成的方波信号的高电平相同，高电平输出的时间不同。
    所述驱动装置接收一组数据信号后，通过转换，输出一组数据线信号，并将这组数据线信号传输给所述显示面板上的一组对应的数据线；控制显示面板的显示状态，对显示装置进行数据驱动。
PCT/CN2018/115608 2018-10-29 2018-11-15 一种显示面板的驱动方法、其驱动装置和显示装置 Ceased WO2020087575A1 (zh)

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