WO2019051925A1 - 显示装置及其驱动方法 - Google Patents

显示装置及其驱动方法 Download PDF

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Publication number
WO2019051925A1
WO2019051925A1 PCT/CN2017/107031 CN2017107031W WO2019051925A1 WO 2019051925 A1 WO2019051925 A1 WO 2019051925A1 CN 2017107031 W CN2017107031 W CN 2017107031W WO 2019051925 A1 WO2019051925 A1 WO 2019051925A1
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Prior art keywords
voltage
display device
adjustment unit
feedback
deviation
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PCT/CN2017/107031
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English (en)
French (fr)
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赵文勤
陈伟
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惠科股份有限公司
重庆惠科金渝光电科技有限公司
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Priority to US15/580,422 priority Critical patent/US20190088231A1/en
Publication of WO2019051925A1 publication Critical patent/WO2019051925A1/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
    • 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
    • G09G3/28—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 luminous gas-discharge panels, e.g. plasma panels
    • 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]
    • 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

Definitions

  • the present application relates to the field of display technologies, and in particular, to a display device and a driving method thereof.
  • the system board is connected to the control board (C-Board) through a line, and the control board is connected to the printed circuit board (PCB) through a flexible flat cable (FFC), and the printed circuit board is then covered by the source.
  • Source-Chip on Film (S-COF) and Gate-Chip on Film (G-COF) are connected to the display area.
  • the display driving method includes: the system motherboard transmits a color (for example: R/G/B) compression signal, a control signal, and a power source to the control board.
  • the signal is processed by the Timing Controller (TCON) on the control board, and then transmitted to the source circuit and the gate circuit of the printed circuit board.
  • TCON Timing Controller
  • the necessary data is compared with the source flip chip and the gate flip chip.
  • the power is transmitted to the display area, so that the display obtains power and signals for presenting the picture.
  • the reference voltage COM has a direct numerical correspondence with the gamma reference voltage Gamma for display, and the voltage values of the highest voltage and the lowest voltage.
  • the reference voltage generating unit of the printed circuit board generates the reference voltage VREF, and the reference voltage VREF and the ground voltage GND are transmitted to a voltage adjusting unit, such as a digital voltage regulator (DVR) or a mechanical voltage regulator. (Voltage Regulator, VR).
  • DVR digital voltage regulator
  • VR Voltage Regulator
  • the panel When the panel is produced, the panel is sampled, and the optimal reference voltage VCOM_Y of the sample panel is obtained through debugging, and it is considered that the optimum reference voltage VCOM of the other display panel is the same as the optimum reference voltage VCOM_Y of the sample.
  • the disadvantage of this method is that the display panel is unstable in the manufacturing process, resulting in process differences between different display panels, resulting in differences in the optimal reference voltage VCOM of different panels, which will result in a difference in the display panel.
  • the difference between the optimal reference voltage VCOM which is not necessarily the optimum reference voltage VCOM_Y, is that the picture flickering phenomenon occurs.
  • the reference voltage VCOM does not coincide with the attenuation speed of the voltage signal of the gamma reference voltage Gamma, and the reference voltage VCOM deviates from the optimum voltage value after a long time of use, so that the various voltages obtained by the panel are numerically related to each other. That is, there is a deviation, which causes undesirable problems such as flicker.
  • an object of the present invention is to provide a display device and a driving method thereof, which improve the problem of flickering of a display screen of a display device by adjusting a reference voltage.
  • a display device includes: a voltage adjustment unit including a first output line and a first input line, the first output line outputs a reference voltage, and the first input line inputs a reference feedback a display panel comprising a second input line and a second output line, wherein the second input line obtains the reference voltage, and the second output line outputs the reference feedback voltage; wherein the voltage adjustment unit is continuous
  • the reference feedback voltage is obtained, and a plurality of voltage values from all the reference feedback voltage values are used as adjustment conditions, and the reference voltage is adjusted according to the adjustment condition.
  • the voltage adjustment unit stores a voltage threshold, and the adjustment condition is a deviation value calculated by the voltage adjustment unit according to a plurality of voltage values of all reference feedback voltage values.
  • the voltage adjustment unit adjusts the reference voltage when the deviation value exceeds the voltage threshold.
  • the voltage adjustment unit adjusts the reference voltage, and when the deviation value is less than the voltage threshold, the voltage adjustment unit stops adjusting the reference voltage.
  • the voltage adjustment unit continuously obtains n reference feedback voltages, including an ith reference feedback voltage and a jth reference feedback voltage, in a time interval, the deviation value is a difference between the i-th reference feedback voltage and the j-th reference feedback voltage, wherein i, j, n are positive integers, i, j is 1 or more and does not exceed n, and i and j are unequal values.
  • a plurality of voltage values of all of the reference feedback voltage values include a maximum feedback voltage and a minimum feedback voltage.
  • the voltage adjustment unit continuously obtains the deviation value during the adjustment of the reference voltage, and when the voltage adjustment unit obtains a deviation minimum value from all the deviation values, and the deviation When the minimum value is less than the voltage threshold, the voltage adjustment unit stops adjusting the reference voltage.
  • the voltage value range is adjusted in a forward or negative direction starting from the reference voltage.
  • the voltage adjustment unit when the voltage adjustment unit continuously obtains the reference feedback voltage, the voltage adjustment unit obtains the n-speed of the frame frequency, where n is an integer greater than 2.
  • a second object of the present application is a driving method of a display device, comprising: continuously obtaining a reference feedback voltage provided by a display panel by a voltage adjustment unit; and obtaining a maximum feedback voltage from all reference feedback voltages by the voltage adjustment unit And a minimum feedback voltage; the voltage adjustment unit calculates a deviation value according to the maximum feedback voltage and the minimum feedback voltage; when the deviation value exceeds the voltage threshold, the voltage adjustment unit adjusts the reference voltage, Until the voltage regulating unit obtains the deviation minimum value from all the deviation values, and the deviation minimum value is smaller than the voltage threshold.
  • a further object of the present application is a display device comprising: a voltage regulating unit including a first output line and a first input line, the first output line outputs a reference voltage, and the first input line inputs a reference feedback voltage
  • the voltage adjustment unit stores a voltage threshold;
  • the display panel includes a second input line and a second output line, the second input line obtains the reference voltage, and the second output line outputs the reference feedback voltage;
  • the voltage regulating unit continuously obtains the reference feedback voltage at twice the frame frequency, and obtains a maximum feedback voltage and a minimum feedback voltage from all the reference feedback voltages in a time interval;
  • the voltage adjustment The unit calculates a deviation value according to the maximum feedback voltage and the minimum feedback voltage; when the deviation value exceeds the voltage threshold, the voltage adjustment unit starts with the reference voltage, and adjusts positively or negatively a voltage value range; the voltage adjustment unit continuously obtains the deviation value during adjustment of the reference voltage When the voltage regulating unit obtains the deviation minimum value from all the deviation values, and the deviation minimum value is less
  • This application can maintain the original process requirements and product cost without significantly changing the premise of the existing production process, and after the display device is used for a long time, the reference voltage VCOM can still maintain the appropriate voltage value, and with the gamma reference voltage Maintain an appropriate numerical correspondence between the two, and solve the problem that the display device flickers and the brightness is unstable due to the deviation of the reference voltage from the optimum value.
  • the display device can adjust the adaptive reference voltage when it is driven, so it can be applied to various types of display devices, and is suitable for display and electronic product components that are shipped in batches.
  • FIG. 1a is a schematic diagram showing the configuration of an exemplary display device.
  • FIG. 1b is a partial structural diagram of a driving circuit of an exemplary display device.
  • FIG. 2 is a schematic diagram showing the structure of a driving circuit applied to a display device according to the method of the present application.
  • FIG. 3 is a schematic diagram showing the structure of a driving circuit applied to a display device according to the method of the present application.
  • FIG. 4 is a schematic diagram showing the structure of a driving circuit applied to a display device according to the method of the present application.
  • FIG. 5 is a schematic diagram showing the driving process of an embodiment applied to a display device according to the method of the present application.
  • the word “comprising” is to be understood to include the component, but does not exclude any other component.
  • “on” means located above or below the target component, and does not mean that it must be on the top based on the direction of gravity.
  • the display panel of the present application may include a first substrate and a second substrate, and the first substrate and the second substrate may be, for example, a Thin Film Transistor (TFT) substrate or a Color Filter (CF) substrate.
  • TFT Thin Film Transistor
  • CF Color Filter
  • the active array switch and the color filter layer of the present application may also be formed on the same substrate.
  • the display panel of the present application may be, for example, a liquid crystal display panel, but is not limited thereto, and may also be an OLED display panel, a W-OLED display panel, a QLED display panel, a plasma display panel, and a curved surface. Display panel or other type of display panel.
  • FIG. 1a is a schematic structural view of an exemplary display device
  • FIG. 1b is a partial structural schematic view of a driving circuit of an exemplary display device.
  • the driving manner of the display device 200 includes: the system mainboard provides color (for example, R/G/B) compression signals, control signals, and power transmission to the control board 100.
  • the Timing Controller (TCON) 101 on the control board 100 and after processing the signals, together with the power source processed by the driving circuit, are transmitted to the printed circuit through a flexible flat cable (FFC) 102, for example.
  • the source circuit and the gate circuit of the board 103 transmit necessary data and power to the display area 106 through the source flip chip 104 and the gate flip chip 105, thereby enabling the display to obtain power and signals for presenting the screen.
  • TCON Timing Controller
  • the display device 200 includes a reference voltage generating unit 210 , a gamma voltage generating unit 220 and a voltage adjusting unit 230 .
  • the reference voltage generating unit 210 supplies the reference voltage Vref to the gamma voltage generating unit 220, the reference voltage Vref After being converted by the gamma voltage generating unit 220, a plurality of sets of gamma reference voltages gamma1, gamma2, ... gammaN-1 and gammaN (N is usually 18 or 14) are output.
  • a plurality of sets of gamma reference voltages are provided to the display area 106 of the display panel 260, respectively, to drive each pixel circuit of the display panel 260 with grayscale voltages of different sizes.
  • the display device 200 needs to generate the reference voltage VCOM first.
  • the reference voltage COM has a direct numerical correspondence with the voltage value of the highest voltage (such as the aforementioned gamma1) and the lowest voltage (such as the aforementioned gammaN) for the gamma reference voltage for display.
  • the reference voltage generating unit 210 generates the reference voltage VREF, and the reference voltage VREF and the ground voltage GND are transmitted to the voltage adjusting unit 230, such as a digital voltage regulator (DVR) or a mechanical voltage. Regulator (Voltage Regulator, VR).
  • DVR digital voltage regulator
  • VR Voltage Regulator
  • the voltage adjustment unit 230 can adjust the required reference voltage VCOM and output the reference voltage VCOM to the display area 106 of the display panel.
  • the numerical relationship between the reference voltage COM and the gamma reference voltage Gamma for display is asymmetrical, that is, a flicker phenomenon occurs.
  • the reference voltage VCOM, the reference voltage VREF, and the gamma reference voltage (gamma) attenuation rate do not match, and after the display panel is used for a long time, the reference voltage VCOM gradually deviates from the optimum voltage value.
  • the display device 200 includes: a voltage adjustment unit 230 including a first output line 232 and a first input line 231, the first output line 232 outputs a reference voltage VCOM, The first input line 231 inputs a reference feedback voltage VCOM_R; the display panel 260 includes a second input line 221 and a second output line 222, the second input line 221 obtains the reference voltage VCOM, and the second output line 222 outputs The reference feedback voltage VCOM_R; wherein the voltage adjustment unit 230 continuously obtains the reference feedback voltage VCOM_R, and uses a plurality of voltages VCOM_R values from all the reference feedback voltages VCOM_R as adjustment conditions, and according to the adjustment The condition is used to adjust the reference voltage VCOM.
  • the voltage adjustment unit 230 stores a voltage threshold Vth, which is a deviation value calculated by the voltage adjustment unit 211 according to the values of the plurality of voltages VCOM_R in all the reference feedback voltage values VCOM_R. When the deviation value exceeds the voltage threshold Vth, the voltage adjustment unit 230 adjusts the reference voltage VCOM.
  • the voltage threshold Vth is preset in an execution parameter or a program of the voltage adjustment unit 230, or is stored in a storage unit (not shown) of the display panel for the voltage.
  • the adjustment unit 230 reads the use.
  • the voltage adjustment unit 230 continuously obtains the n reference feedback voltages VCOM_R, including the ith reference feedback voltage VCOM_R and the jth reference feedback voltage VCOM_R, which are the values. a difference between the i-th reference feedback voltage VCOM_R and the jth reference feedback voltage VCOM_R, wherein i, j, n are positive integers, i, j is 1 or more and does not exceed n, and i and j are unequal values.
  • the time interval is an execution parameter or a program that is preset to the voltage adjustment unit 230.
  • the storage unit (not shown) stored in the display panel 260 is used by the voltage adjustment unit 230 for reading.
  • the voltage adjustment unit 230 stops adjusting the reference voltage VCOM.
  • the voltage adjustment unit 230 continuously obtains the deviation value during the adjustment of the reference voltage VCOM, and when the voltage adjustment unit 230 obtains the deviation minimum value from all the deviation values, and the deviation When the minimum value is less than the voltage threshold Vth, the voltage adjustment unit 230 stops adjusting the reference voltage VCOM.
  • a number of all of the reference feedback voltages VCOM_R include a maximum feedback voltage VCOM_R(max) and a minimum feedback voltage VCOM_R(min).
  • the voltage adjustment unit 230 when the voltage adjustment unit 230 adjusts the reference voltage VCOM, it starts with the reference voltage VCOM, and adjusts a voltage value range VCOM_add in a positive or negative direction, that is, VCOM+VCOM_add to VCOM- Between VCOM_add.
  • the voltage value range VCOM_add is preset in an execution parameter or a program of the voltage adjustment unit 230, or is stored in a storage unit (not shown) of the display panel 260.
  • the voltage adjustment unit 230 reads and uses.
  • the voltage adjustment unit 230 when the voltage adjustment unit 230 continuously obtains the reference feedback voltage VCOM_R, it is obtained at n times the frame frequency, where n is an integer greater than 2.
  • the voltage regulating unit 230 is provided with a voltage equalizing unit 240 between the display panels 260, and the voltage equalizing unit 240 continuously samples the voltage signal on the second output line 222, and After continuous sampling for a certain number of sampling times or for a certain period of time, the average value of the sampled values is provided as the reference feedback voltage VCOM_R.
  • the voltage adjustment unit 230 is provided with a voltage selection unit 250 between the display panels 260.
  • the voltage selection unit 210 continuously samples the voltage signal on the second output line 222, and provides one or more sample values from all the sample values as a reference after continuously sampling for a certain number of sampling times or for a certain period of time.
  • the voltage VCOM_R is fed back to the voltage regulating unit 230.
  • the selection logic of the voltage selection unit 250 is determined according to the actual needs of the designer, and is not limited.
  • the voltage conditioning unit 230 is a digital voltage regulator or a mechanical voltage regulator.
  • the voltage adjustment unit 230 when the voltage adjustment unit 230 is a digital voltage regulator, the voltage adjustment unit 230 is provided with an imaginary/digital signal converter between the display panels 260 to convert the reference feedback voltage VCOM_R. Into a digital signal.
  • FIG. 5 is a schematic diagram showing the driving process of an embodiment applied to a display device according to the method of the present application.
  • a driving method of a display device of the present application includes:
  • step S510 the reference feedback voltage VCOM_R provided by the display panel 260 is continuously obtained by the voltage adjustment unit 230.
  • step S520 the maximum feedback voltage VCOM_R(max) and the minimum feedback voltage VCOM_R(min) are obtained from all the reference feedback voltages VCOM_R by the voltage adjustment unit 230.
  • step S530 the voltage adjusting unit 230 calculates a deviation value according to the maximum feedback voltage VCOM_R(max) and the minimum feedback voltage VCOM_R(min).
  • Step S540 when the deviation value exceeds the voltage threshold value Vth, the voltage adjustment unit 230 adjusts the reference voltage VCOM until the voltage adjustment unit 230 obtains the deviation minimum value from all the deviation values, and the deviation The minimum value is less than the voltage threshold.
  • a display device 200 of the present application includes: a voltage adjustment unit 230 including a first output line 232 and a first input line 231, and the first output line 232 outputs a reference voltage VCOM,
  • the first input line 231 inputs a reference feedback voltage VCOM_R, the voltage adjustment unit 230 stores a voltage threshold Vth;
  • the display panel 260 includes a second input line 221 and a second output line 222, and the second input line 221 is obtained.
  • the reference voltage VCOM, the second output line 222 outputs the reference feedback voltage VCOM_R; wherein the voltage adjustment unit 230 continuously obtains the reference feedback voltage VCOM_R at twice the frame frequency, and at a time
  • the maximum feedback voltage VCOM_R(max) and the minimum feedback voltage VCOM_R(min) are obtained from all the reference feedback voltages VCOM_R during the interval; the voltage adjustment unit 230 according to the maximum feedback voltage VCOM_R(max) and the minimum feedback voltage VCOM_R(min) calculates a deviation value
  • the reference voltage VCOM is a start, and a voltage value range VCOM_add is adjusted in a forward or negative direction; the voltage adjustment unit 230 continuously obtains the deviation value during the adjustment of the reference voltage VCOM; when the voltage adjustment unit VCOM When the deviation minimum value is obtained from all the deviation values, and the minimum deviation value is smaller than the voltage threshold
  • This application can maintain the original process requirements and product cost without significantly changing the premise of the existing production process, and after the display panel is used for a long time, the reference voltage VCOM can still maintain the appropriate voltage value, and with the gamma reference voltage Maintain an appropriate numerical correspondence between the two, and solve the problem that the display panel flickers due to the deviation of the reference voltage from the optimum value, and the brightness is unstable.

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Abstract

本申请提供了一种显示装置及其驱动方法。显示装置包括：电压调节单元，包括第一输出线路与第一输入线路，此第一输出线路输出基准电压，此第一输入线路输入基准回馈电压；显示面板，包括第二输入线路与第二输出线路，此第二输入线路取得此基准电压，此第二输出线路输出此基准回馈电压；其中，此电压调节单元持续性取得此基准回馈电压，并从所有的基准回馈电压数值中的数个电压数值作为调节条件，并依据此调节条件来调整此基准电压。

Description

显示装置及其驱动方法 技术领域
本申请涉及一种显示技术领域，特别涉及一种显示装置及其驱动方法。
背景技术
显示器中，系统主板通过线路连接至控制板(Control Board，C-Board)，控制板通过如柔性扁平电缆(Flexible Flat Cable，FFC)连接印刷电路板(PCB)，印刷电路板再通过源极覆晶薄膜(Source-Chip on Film，S-COF)和栅极覆晶薄膜(Gate-Chip on Film，G-COF)与显示区连接。显示器驱动方式包括：系统主板将颜色(例如：R/G/B)压缩信号、控制信号及电源传输至控制板。信号经过控制板上的时序控制器(Timing Controller，TCON)处理后，传输至印刷电路板的源极电路及栅极电路，通过源极覆晶薄膜和栅极覆晶薄膜将必要性的数据与电源传输于显示区，从而使得显示器获得呈现画面需求的电源、信号。
然而，显示器的显示作业是通过电压驱动。显示过程中,显示器需要先产生基准电压VCOM。基准电压COM与显示用的伽马参考电压Gamma，其最高电压及最低电压的电压值有直接的数值对应关系。现有技术中，印刷电路板的参考电压产生单元产生参考电压VREF，参考电压VREF及接地电压GND会被传输至电压调节单元，如数字电压调节器(Digital Voltage Regulator，DVR)或机械电压调节器(Voltage Regulator，VR)。根据分压原理，电压调节单元即可调节得到需求的基准电压VCOM，输出至显示面板。
但是，基准电压COM与显示用的伽马参考电压Gamma的数值关系不对称时，即会产生画面闪烁(flicker)的现象。此问题通常的做法有两种：
(1)当面板产出时对面板进行抽样，通过调试得到样品面板的最佳基准电压VCOM_Y，进而认为其他显示面板的最佳基准电压VCOM和样品的最佳基准电压VCOM_Y相同。这种做法的缺点在于，显示面板在制造过程中由于制程不稳定，导致不同显示面板之间存在制程差异，导致不同面板的最佳基准电压VCOM有差异，这样就会导致有差异显示面板会有相异最佳基准电压VCOM，其不见得是最佳基准电压VCOM_Y，即产生画面闪烁现象。
(2)给产线上添加光学sensor侦测flicker强度，并通过软体调试每个显示面板的最佳基准电压VCOM，当画面闪烁现象最低时认为是显示面板的最佳基准电压VCOM_Y。这种做法的缺点在于，工时较高，而且也不适用于印刷电路板(X board)和控制板(C board)分离的产品，因为印刷电路板(X board)和控制板(C board)分离的产品一般分开出货，到客户端还是会导致面板的最佳VCOM有误 差。
再加上，随着使用时间的延长，相关组件的工作电压会有所衰减。而且基准电压VCOM与伽马参考电压Gamma等类型的电压信号的衰减速度并不一致，会导致长时间使用后，基准电压VCOM偏离最佳电压值，如此显示面板取得的各类电压，彼此的数值关系即有偏差，进而造成闪烁等不良问题。
发明内容
为了解决上述技术问题，本申请的目的在于，提供一种显示装置及其驱动方法，通过调整基准电压，改善显示装置呈现画面的闪烁等问题。
本申请的目的及解决其技术问题是采用以下技术方案来实现的。依据本申请提出的一种显示装置，所述显示装置包括：电压调节单元，包括第一输出线路与第一输入线路，所述第一输出线路输出基准电压，所述第一输入线路输入基准回馈电压；显示面板，包括第二输入线路与第二输出线路，所述第二输入线路取得所述基准电压，所述第二输出线路输出所述基准回馈电压；其中，所述电压调节单元持续性取得所述基准回馈电压，并从所有的基准回馈电压数值中的数个电压数值作为调节条件，并依据所述调节条件来调整所述基准电压。
本申请解决其技术问题还可采用以下技术措施进一步实现。
在本申请的一实施例中，所述电压调节单元储存有电压阈值，所述调节条件为所述电压调节单元依据所有的基准回馈电压数值中的数个电压数值所计算出的偏差数值，当所述偏差数值超过所述电压阈值时，所述电压调节单元调整所述基准电压。
在本申请的一实施例中，所述电压调节单元调整所述基准电压期间，当所述偏差数值小于所述电压阈值时，所述电压调节单元停止调整所述基准电压。
在本申请的一实施例中，所述电压调节单元在一时间间隔内持续性取得n个所述基准回馈电压，包括第i基准回馈电压与第j基准回馈电压，所述偏差数值是所述第i基准回馈电压与所述第j基准回馈电压的差值，其中i，j，n为正整数，i，j为1以上且不超过n，且i与j为不等值。
在本申请的一实施例中，所有的基准回馈电压数值中的数个电压数值包括最大回馈电压与最小回馈电压。
在本申请的一实施例中，所述电压调节单元调整所述基准电压期间，持续性取得所述偏差数值，当所述电压调节单元从所有的偏差数值中取得偏差最小数值，且所述偏差最小数值小于所述电压阈值时，所述电压调节单元停止调整所述基准电压。
在本申请的一实施例中，所述电压调节单元调节所述基准电压时，是以所述基准电压为起始，正向或负向调节一电压数值范围。
在本申请的一实施例中，所述电压调节单元持续性取得所述基准回馈电压时，是以帧频率的n倍速度进行取得，其中n为大于2的整数。
本申请的次一目的为一种显示装置的驱动方法，其包括：通过电压调节单元持续性取得显示面板提供的基准回馈电压；通过所述电压调节单元从所有的基准回馈电压中取得最大回馈电压与最小回馈电压；通过所述电压调节单元依据所述最大回馈电压与所述最小回馈电压计算出偏差数值；当所述偏差数值超过所述电压阈值，所述电压调节单元调节所述基准电压，直至所述电压调节单元从所有的偏差数值中取得偏差最小数值，且所述偏差最小数值小于所述电压阈值。
本申请的又一目的为一种显示装置，其包括：电压调节单元，包括第一输出线路与第一输入线路，所述第一输出线路输出基准电压，所述第一输入线路输入基准回馈电压，所述电压调节单元储存有电压阈值；显示面板，包括第二输入线路与第二输出线路，所述第二输入线路取得所述基准电压，所述第二输出线路输出所述基准回馈电压；其中，所述电压调节单元以帧频率的2倍速度持续性取得所述基准回馈电压，并在一时间间隔内，从所有的基准回馈电压中取得最大回馈电压与最小回馈电压；所述电压调节单元依据所述最大回馈电压与所述最小回馈电压计算出偏差数值；当所述偏差数值超过所述电压阈值，所述电压调节单元以所述基准电压为起始，正向或负向调节一电压数值范围；所述电压调节单元在调节所述基准电压期间，持续性取得所述偏差数值；当所述电压调节单元从所有的偏差数值中取得偏差最小数值，且所述偏差最小数值小于所述电压阈值时，所述电压调节单元停止调整所述基准电压。
本申请可以不大幅改变现有生产流程的前提，维持原制程需求和产品成本，且在显示装置在长时间使用后，基准电压VCOM仍能保持在适当的电压数值，并与伽马参考电压之间维持合适的数值对应关系，解决显示装置因基准电压偏离最佳值而造成画面闪烁，亮度不稳定的问题。而且显示装置在驱动时即能进行自适应性的基准电压的调节，故较能适用于各类显示装置，而且适用于分批出货的显示及电子产品组件。
附图说明
图1a为范例性的显示装置的配置结构示意图。
图1b为范例性的显示装置的驱动电路局部结构示意图。
图2为显示依据本申请的方法，一实施例应用于显示装置的驱动电路架构示意图。
图3为显示依据本申请的方法，一实施例应用于显示装置的驱动电路架构示意图。
图4为显示依据本申请的方法，一实施例应用于显示装置的驱动电路架构示意图。
图5为显示依据本申请的方法，一实施例应用于显示装置的驱动流程示意图。
具体实施方式
以下各实施例的说明是参考附加的图式，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。
附图和说明被认为在本质上是示出性的，而不是限制性的。在图中，结构相似的单元是以相同标号表示。另外，为了理解和便于描述，附图中示出的每个组件的尺寸和厚度是任意示出的，但是本申请不限于此。
在附图中，为了清晰起见，夸大了层、膜、面板、区域等的厚度。在附图中，为了理解和便于描述，夸大了一些层和区域的厚度。将理解的是，当例如层、膜、区域或基底的组件被称作“在”另一组件“上”时，所述组件可以直接在所述另一组件上，或者也可以存在中间组件。
另外，在说明书中，除非明确地描述为相反的，否则词语“包括”将被理解为意指包括所述组件，但是不排除任何其它组件。此外，在说明书中，“在......上”意指位于目标组件上方或者下方，而不意指必须位于基于重力方向的顶部上。
为更进一步阐述本申请为达成预定申请目的所采取的技术手段及功效，以下结合附图及较佳实施例，对依据本申请提出的一种显示装置及其驱动方法，其具体实施方式、结构、特征及其功效，详细说明如后。
本申请的显示面板可包括第一基板及第二基板，第一基板及第二基板可例如为主动阵列开关(Thin Film Transistor，TFT)基板、彩色滤光层(Color Filter，CF)基板。然不限于此，在一些实施例中，本申请的主动阵列开关及彩色滤光层亦可形成于同一基板上。
在一些实施例中，本申请的所述显示面板可例如为液晶显示面板，然不限于此，其亦可为OLED显示面板，W-OLED显示面板，QLED显示面板，等离子体显示面板，曲面型显示面板或其他类型显示面板。
图1a为范例性的显示装置的配置结构示意图，图1b为范例性的显示装置的驱动电路局部结构示意图。如图1a所示，显示装置200的驱动方式包括：系统主板提供颜色(例如：R/G/B)压缩信号、控制信号及电源传输至控制板100。控制板100上的时序控制器(Timing Controller，TCON)101与处理此等信号后，连同被驱动电路处理的电源，通过如柔性扁平电缆(Flexible Flat Cable，FFC)102，一并传输至印刷电路板103的源极电路及栅极电路，通过源极覆晶薄膜104和栅极覆晶薄膜105将必要性的数据与电源传输于显示区106，从而使得显示器获得呈现画面需求的电源、信号。
如图1b绘示，显示装置200包括：参考电压产生单元210、伽马电压产生单元220与电压调节单元230。参考电压产生单元210向伽马电压产生单元220提供参考电压Vref，参考电压Vref 经伽马电压产生单元220转换后输出多组伽马参考电压gamma1、gamma2......gammaN-1和gammaN(N通常为18或14)。多组伽马参考电压分别被提供显示面板260的显示区106，从而以不同大小的灰阶电压驱动显示面板260的每一个像素电路。
显示过程中,显示装置200需要先产生基准电压VCOM。一般而言，基准电压COM与显示用的伽马参考电压，其最高电压(如前述gamma1)及最低电压(如前述gammaN)的电压值有直接的数值对应关系。现有技术中，参考电压产生单元210产生参考电压VREF，参考电压VREF及接地电压GND会被传输至电压调节单元230，电压调节单元230如数字电压调节器(Digital Voltage Regulator，DVR)或机械电压调节器(Voltage Regulator，VR)。根据分压原理，电压调节单元230即可调节得到需求的基准电压VCOM，并将输出基准电压VCOM至显示面板的显示区106。
然而，基准电压COM与显示用的伽马参考电压Gamma的数值关系不对称，即会产生画面闪烁(flicker)的现象。而且基准电压VCOM、参考电压VREF与伽马参考电压(gamma)的衰减速度并不一致，显示面板在长时间使用后，基准电压VCOM逐渐偏离最佳电压值。
图2为显示依据本申请的方法，一实施例应用于显示装置的驱动电路的架构示意图。在本申请一实施例中，所述一种显示装置200，包括：电压调节单元230，包括第一输出线路232与第一输入线路231，所述第一输出线路232输出基准电压VCOM，所述第一输入线路231输入基准回馈电压VCOM_R；显示面板260，包括第二输入线路221与第二输出线路222，所述第二输入线路221取得所述基准电压VCOM，所述第二输出线路222输出所述基准回馈电压VCOM_R；其中，所述电压调节单元230持续性取得所述基准回馈电压VCOM_R，并从所有的基准回馈电压VCOM_R数值中的数个电压VCOM_R数值作为调节条件，并依据所述调节条件来调整所述基准电压VCOM。
在一些实施例中，所述电压调节单元230储存有电压阈值Vth，所述调节条件为所述电压调节单元211依据所有的基准回馈电压数值VCOM_R中的数个电压VCOM_R数值所计算出的偏差数值，当所述偏差数值超过所述电压阈值Vth时，所述电压调节单元230调整所述基准电压VCOM。
在一些实施例中，所述电压阈值Vth是被预先设定于所述电压调节单元230的执行参数或程序之中，或是储存于显示面板的储存单元(图未示)，供所述电压调节单元230读取使用。
在一些实施例中，所述电压调节单元230在一时间间隔内持续性取得n个所述基准回馈电压VCOM_R，包括第i基准回馈电压VCOM_R与第j基准回馈电压VCOM_R，所述偏差数值是所述第i基准回馈电压VCOM_R与所述第j基准回馈电压VCOM_R的差值，其中i，j，n为正整数，i，j为1以上且不超过n，且i与j为不等值。
在一些实施例中，所述时间间隔是被预先设定于所述电压调节单元230的执行参数或程序之 中，或是储存于显示面板260的储存单元(图未示)，供所述电压调节单元230读取使用。
在一些实施例中，所述电压调节单元230调整所述基准电压VCOM期间，当所述偏差数值小于所述电压阈值Vth时，所述电压调节单元230停止调整所述基准电压VCOM。
在一些实施例中，所述电压调节单元230调整所述基准电压VCOM期间，持续性取得所述偏差数值，当所述电压调节单元230从所有的偏差数值中取得偏差最小数值，且所述偏差最小数值小于所述电压阈值Vth时，所述电压调节单元230停止调整所述基准电压VCOM。
在一些实施例中，所有的基准回馈电压VCOM_R中的数个包括最大回馈电压VCOM_R(max)与最小回馈电压VCOM_R(min)。
在一些实施例中，所述电压调节单元230调节所述基准电压VCOM时，是以所述基准电压VCOM为起始，正向或负向调节一电压数值范围VCOM_add，即VCOM+VCOM_add至VCOM-VCOM_add之间。
在一些实施例中，所述电压数值范围VCOM_add是被预先设定于所述电压调节单元230的执行参数或程序之中，或是储存于显示面板260的储存单元(图未示)，供所述电压调节单元230读取使用。
在一些实施例中，所述电压调节单元230持续性取得所述基准回馈电压VCOM_R时，是以帧频率的n倍速度进行取得，其中n为大于2的整数。
图3为显示依据本申请的方法，一实施例应用于显示装置的驱动电路的架构示意图。在一些实施例中，所述电压调节单元230所述显示面板260之间设置有均压单元240，所述均压单元240持续性对所述第二输出线路222上的电压信号作取样，并在一定取样次数或是一定时间内连续取样后，提供取样数值的平均值，以此作为基准回馈电压VCOM_R。
图4为显示依据本申请的方法，一实施例应用于显示装置的驱动电路的架构示意图。在一些实施例中，所述电压调节单元230所述显示面板260之间设置有电压选择单元250。所述电压选择单元210持续性对所述第二输出线路222上的电压信号作取样，并在一定取样次数或是一定时间内连续取样后，从所有取样数值中提供一个以上的取样数值作为基准回馈电压VCOM_R，再回馈给所述电压调节单元230。所述电压选择单元250的选择逻辑是依据设计者实际需求而定，并未有所设限。
在一些实施例中，所述电压调节单元230为数字式电压调节器或机械式电压调节器。
在一些实施例中，所述电压调节单元230为数字式电压调节器时，所述电压调节单元230所述显示面板260之间设置有拟真/数字信号转换器，以将基准回馈电压VCOM_R转换成数字信号。
图5为显示依据本申请的方法，一实施例应用于显示装置的驱动流程示意图。在本申请一实施 例中，本申请的一种显示装置的驱动方法，其包括：
步骤S510，通过电压调节单元230持续性取得显示面板260提供的基准回馈电压VCOM_R。
步骤S520，通过所述电压调节单元230从所有的基准回馈电压VCOM_R中取得最大回馈电压VCOM_R(max)与最小回馈电压VCOM_R(min)。
步骤S530，所述电压调节单元230依据所述最大回馈电压VCOM_R(max)与所述最小回馈电压VCOM_R(min)计算出偏差数值。
步骤S540，当所述偏差数值超过所述电压阈值Vth，所述电压调节单元230调节所述基准电压VCOM，直至所述电压调节单元230从所有的偏差数值中取得偏差最小数值，且所述偏差最小数值小于所述电压阈值。
在本申请一实施例中，本申请的一种显示装置200，其包括：电压调节单元230，包括第一输出线路232与第一输入线路231，所述第一输出线路232输出基准电压VCOM，所述第一输入线路231输入基准回馈电压VCOM_R，所述电压调节单元230储存有电压阈值Vth；显示面板260，包括第二输入线路221与第二输出线路222，所述第二输入线路221取得所述基准电压VCOM，所述第二输出线路222输出所述基准回馈电压VCOM_R；其中，所述电压调节单元230以帧频率的2倍速度持续性取得所述基准回馈电压VCOM_R，并在一时间间隔内，从所有的基准回馈电压VCOM_R中取得最大回馈电压VCOM_R(max)与最小回馈电压VCOM_R(min)；所述电压调节单元230依据所述最大回馈电压VCOM_R(max)与所述最小回馈电压VCOM_R(min)计算出偏差数值|VCOM_R(max)-VCOM_R(min)|；当所述偏差数值超过所述电压阈值Vth，所述电压调节单元230以所述基准电压VCOM为起始，正向或负向调节一电压数值范围VCOM_add；所述电压调节单元230在调节所述基准电压VCOM期间，持续性取得所述偏差数值；当所述电压调节单元VCOM从所有的偏差数值中取得偏差最小数值，且所述偏差最小数值小于所述电压阈值Vth时，所述电压调节单元230停止调整所述基准电压VCOM。
本申请可以不大幅改变现有生产流程的前提，维持原制程需求和产品成本，且在显示面板在长时间使用后，基准电压VCOM仍能保持在适当的电压数值，并与伽马参考电压之间维持合适的数值对应关系，解决显示面板因基准电压偏离最佳值而造成画面闪烁，亮度不稳定的问题。
“在一些实施例中”及“在各种实施例中”等用语被重复地使用。此用语通常不是指相同的实施例；但它也可以是指相同的实施例。“包含”、“具有”及“包括”等用词是同义词，除非其前后文意显示出其它意思。
以上所述，仅是本申请的较佳实施例而已，并非对本申请作任何形式上的限制，虽然本申请已以较佳实施例揭露如上，然而并非用以限定本申请，任何熟悉本专业的技术人员，在不脱离本申请 技术方案范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本申请技术方案的内容，依据本申请的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本申请技术方案的范围内。

Claims (20)

  1. 一种显示装置，包括：
    电压调节单元，包括第一输出线路与第一输入线路，所述第一输出线路输出基准电压，所述第一输入线路输入基准回馈电压；
    显示面板，包括第二输入线路与第二输出线路，所述第二输入线路取得所述基准电压，所述第二输出线路输出所述基准回馈电压；
    其中，所述电压调节单元持续性取得所述基准回馈电压，并从所有的基准回馈电压数值中的数个电压数值作为调节条件，并依据所述调节条件来调整所述基准电压。
  2. 如权利要求1所述的显示装置，其中，所述电压调节单元储存有电压阈值。
  3. 如权利要求2所述的显示装置，其中，所述调节条件为所述电压调节单元依据所有的基准回馈电压数值中的数个电压数值所计算出的偏差数值。
  4. 如权利要求3所述的显示装置，其中，当所述偏差数值超过所述电压阈值时，所述电压调节单元调整所述基准电压。
  5. 如权利要求4所述的显示装置，其中，所述电压调节单元调整所述基准电压期间，当所述偏差数值小于所述电压阈值时，所述电压调节单元停止调整所述基准电压。
  6. 如权利要求4所述的显示装置，其中，所述电压调节单元在一时间间隔内持续性取得n个所述基准回馈电压，包括第i基准回馈电压与第j基准回馈电压，i，j，n为正整数，i，j为1以上且不超过n，且i与j为不等值。
  7. 如权利要求6所述的显示装置，其中，所述偏差数值是所述第i基准回馈电压与所述第j基准回馈电压的差值。
  8. 如权利要求7所述的显示装置，其中，所述电压调节单元调整所述基准电压期间，持续性取得所述偏差数值。
  9. 如权利要求8所述的显示装置，其中，当所述电压调节单元从所有的偏差数值中取得偏差最小数值，且所述偏差最小数值小于所述电压阈值时，所述电压调节单元停止调整所述基准电压。
  10. 如权利要求3所述的显示装置，其中，所有的基准回馈电压数值中的数个电压数值包括最大回馈电压。
  11. 如权利要求3所述的显示装置，其中，所有的基准回馈电压数值中的数个电压数值包括最小回馈电压。
  12. 如权利要求1所述的显示装置，其中，所述电压调节单元调节所述基准电压时，是以所述基准电压为起始，正向调节一电压数值范围。
  13. 如权利要求1所述的显示装置，其中，所述电压调节单元调节所述基准电压时，是以所述基准电压为起始，负向调节一电压数值范围。
  14. 如权利要求1所述的显示装置，其中，所述电压调节单元持续性取得所述基准回馈电压时，是以帧频率的n倍速度进行取得，n为大于2的整数。
  15. 一种显示装置的驱动方法，包括：
    通过电压调节单元持续性取得显示面板提供的基准回馈电压；
    通过所述电压调节单元从所有的基准回馈电压中取得最大回馈电压与最小回馈电压；
    通过所述电压调节单元依据所述最大回馈电压与所述最小回馈电压计算出偏差数值；
    当所述偏差数值超过所述电压阈值，所述电压调节单元调节所述基准电压，直至所述电压调节单元从所有的偏差数值中取得偏差最小数值，且所述偏差最小数值小于所述电压阈值。
  16. 如权利要求15所述的显示装置的驱动方法，其中，所述电压调节单元在一时间间隔内持续性取得n个所述基准回馈电压，包括第i基准回馈电压与第j基准回馈电压，i，j，n为正整数，i，j为1以上且不超过n，且i与j为不等值。
  17. 如权利要求16所述的显示装置的驱动方法，其中，所述偏差数值是所述第i基准回馈电压与所述第j基准回馈电压的差值。
  18. 如权利要求15所述的显示装置的驱动方法，其中，所述电压调节单元调节所述基准电压时，是以所述基准电压为起始，正向调节一电压数值范围。
  19. 如权利要求15所述的显示装置的驱动方法，其中，所述电压调节单元调节所述基准电压时，是以所述基准电压为起始，负向调节一电压数值范围。
  20. 一种显示装置，包括：
    电压调节单元，包括第一输出线路与第一输入线路，所述第一输出线路输出基准电压，所述第一输入线路输入基准回馈电压，所述电压调节单元储存有电压阈值；
    显示面板，包括第二输入线路与第二输出线路，所述第二输入线路取得所述基准电压，所述第二输出线路输出所述基准回馈电压；
    其中，所述电压调节单元以帧频率的2倍速度持续性取得所述基准回馈电压，并在一时间间隔内，从所有的基准回馈电压中取得最大回馈电压与最小回馈电压；所述电压调节单元依据所述最大回馈电压与所述最小回馈电压计算出偏差数值；当所述偏差数值超过所述电压阈值，所述电压调节单元以所述基准电压为起始，正向或负向调节一电压数值范围；所述电压调节单元在调节所述基准电压期间，持续性取得所述偏差数值；当所述电压调节单元从所有的偏差数值中取得偏差最小数值，且所述偏差最小数值小于所述电压阈值时，所述电压调节单元停止调整所 述基准电压。
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