WO2020093467A1 - 一种驱动电路、驱动方法和显示装置 - Google Patents

一种驱动电路、驱动方法和显示装置 Download PDF

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Publication number
WO2020093467A1
WO2020093467A1 PCT/CN2018/117091 CN2018117091W WO2020093467A1 WO 2020093467 A1 WO2020093467 A1 WO 2020093467A1 CN 2018117091 W CN2018117091 W CN 2018117091W WO 2020093467 A1 WO2020093467 A1 WO 2020093467A1
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Prior art keywords
common voltage
output
initializer
value
compensator
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English (en)
French (fr)
Inventor
王明良
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HKC Co Ltd
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HKC Co Ltd
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Priority to US16/982,546 priority Critical patent/US11138916B2/en
Publication of WO2020093467A1 publication Critical patent/WO2020093467A1/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
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
    • 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
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0404—Matrix technologies
    • G09G2300/0408—Integration of the drivers onto the display substrate
    • 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
    • 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 circuit, a driving method, 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 application provides a driving circuit, a driving method and a display device that actively compensate for the offset of the common voltage and ensure the display effect.
  • the present application provides a driving circuit
  • the driving circuit includes: an initializer that outputs a common voltage; a compensator that is coupled to the initializer; a controller; and the initializer includes: an initial memory, The initial value of the common voltage is stored; the operation circuit converts the initial value of the common voltage into the output common voltage output; the controller collects the initial value of the common voltage of the initializer and the value of the output common voltage, and The comparison of the initial value of the common voltage and the value of the output common voltage determines whether the compensator is controlled to compensate the value of the common voltage.
  • the application also discloses a driving circuit, the driving circuit includes:
  • the initial memory stores the initial value of the common voltage and the first signal code corresponding to the initial value of the common voltage
  • the first switch is connected to the initial memory control; when the difference between the initial value of the common voltage and the value of the output common voltage is less than a preset threshold, the normal operation of the initializer is controlled;
  • a digital-to-simulator encoding the first signal transmitted from the initial memory into an analog voltage
  • An output current amplifier the input terminal is coupled to the output terminal of the digital-to-simulator, and the output terminal outputs the common voltage
  • Compensation memory to store compensation signal codes
  • the second switch is connected to the compensation memory control; when the difference between the initial value of the common voltage and the value of the output common voltage is greater than or equal to a preset threshold, the compensation memory is controlled to work on the common voltage To compensate;
  • N resistors connected in series the resistors are connected in series between the reference voltage and the low level to form N-1 divided voltages;
  • N-1 A / D conversion transistors the first input terminal of the A / D conversion transistor is respectively connected to the plurality of divided voltages, the second input terminal is connected to the common voltage output by the initializer, and the output terminal is connected to The encoder; the encoder encodes the common voltage output by the initializer into a second signal code and transmits it to the main controller.
  • the decoder is coupled to the output end of the analog-to-digital device, and decodes the second signal encoding transmitted from the analog-to-digital device;
  • a microcontroller coupled to the decoder, encodes the decoded second signal and the first signal encoding operation
  • the controller is coupled to the microcontroller, and determines whether to control the compensator to compensate the value of the common voltage according to the comparison result of the microcontroller;
  • the driving circuit further includes a control circuit board, the initial memory, the first switch, the digital to simulator, the output current amplifier, the compensation memory, the second switch, the N resistors in series, the encoder, and the N-1 modulus
  • the conversion transistor, decoder, microcontroller and controller are integrated in the control circuit board.
  • This application also discloses a driving method, which is applied to a driving circuit.
  • the driving circuit includes an initializer and a compensator. The steps include:
  • the initial value of the common voltage and the value of the output common voltage are compared to determine whether the compensator is controlled to compensate the value of the common voltage.
  • the present application also discloses a display device including a display panel, the display panel including: a first substrate; a second substrate, which is opposite to the first substrate; an array layer, formed on the first substrate; An electrode is formed on the second substrate; and the driving circuit as described above.
  • the resolution of the liquid crystal panel becomes higher and higher, the size becomes larger and larger, and the current pumping of the common electrode becomes larger and larger. Due to the existence of the internal impedance of the control circuit board, then as the current increases, the common voltage drops. The more, the common voltage will have different offset conditions, affecting the display effect. At the same time, because the common voltage is also affected by the array layer, the array layer is used to transfer the data of the display screen, then the common voltage will also have different offsets according to the different displayed screens. Add a compensator to couple with the initializer to detect the actual output common voltage.
  • FIG. 1 is a schematic diagram of a display panel structure according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a driving circuit according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a driving circuit according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a control circuit board structure according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a structure of an analog-to-digital converter according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of an original driving circuit according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of steps of a driving method according to an embodiment of the present application.
  • FIG. 8 is a schematic 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 driving circuit 200 includes an initializer 210 that outputs a common voltage, a compensator 220 coupled to the initializer 210, and a controller 230 ,
  • the initializer 210 includes an initial memory 211 storing the initial value of the common voltage and an operation circuit 280 that converts the initial value of the common voltage into an output common voltage output;
  • the controller 230 collects the initial value of the common voltage of the initializer 210 and The value of the output common voltage is compared with the initial value of the common voltage and the value of the output common voltage to determine whether the compensator 220 is controlled to compensate the value of the common voltage.
  • the liquid crystal panel is divided into a lower array layer and an upper common electrode.
  • the common voltage of the upper common electrode is usually called VCOM.
  • the resolution is higher and higher, the size is larger and larger, and the current pumping of the common electrode 131 is larger and larger. Due to the existence of the internal impedance in the driving circuit 200, then as the current is larger, the common voltage will drop more, Different offsets of the common voltage will occur, which will affect the display effect.
  • the common voltage will also be affected by the array layer 121, the array layer 121 is used to transfer the data of the display screen, then it will vary with the displayed screen. The voltage will also have different offset conditions.
  • the controller 230 collects the initial value of the common voltage of the initializer 210 and the value of the output common voltage, and compares the initial value of the common voltage and the value of the output common voltage to determine Whether to control the compensator 220 to compensate the offset of the common voltage to the value of the common voltage, realize the correction of the common voltage, and ensure the display effect.
  • the controller 230 includes a first switch 240 and a second switch 250, and the first switch 240 is in control connection with the initiator 210; when the difference between the initial value of the common voltage and the value of the output common voltage is less than the pre- When the threshold is set, the initializer 210 is controlled to work normally; the second switch 250 is connected to the compensator 220; when the difference between the initial value of the common voltage and the value of the output common voltage is greater than or equal to the preset threshold, the compensator 220 is controlled Work to compensate the value of the common voltage.
  • a preset threshold is set as a reference standard. This preset threshold is obtained by considering the display effect of the display panel 110, the difference in panel size and resolution, and is set by the inventor in the art according to specific circumstances, exceeding the preset
  • the threshold value considers that the public voltage exceeds the tolerable range, and then compensates; the initial value of the public voltage and the value of the output public voltage are divided into two cases, when the difference between the initial value of the public voltage and the value of the output public voltage
  • the first switch 240 controls the initiator 210 to work normally; when the difference between the initial value of the common voltage and the value of the output common voltage is greater than or equal to the preset threshold, the second switch 250 controls the compensator 220 to work To compensate for the value of the common voltage.
  • the initial memory 211 stores the first signal code corresponding to the initial value of the common voltage
  • the compensator 220 stores the compensation signal code of the common voltage
  • the controller 230 includes: an analog-to-digital device 260, and an acquisition initializer The value of the common voltage output by 210 is converted into a second signal code; the main controller 270 collects the first signal code of the initializer 210 and compares the second signal code with the first signal code to decide whether to control the compensator 220 compensates the value of the common voltage.
  • the initial memory 211 stores the first signal code corresponding to the initial value of the common voltage
  • the compensator 220 stores the compensation signal code of the common voltage
  • the analog-to-digital device 260 collects the value of the common voltage output by the initializer 210, And converted to the second signal code, at this time the main controller 270 will compare the first signal code and the second signal code, and control the switch on and off according to the comparison result, and decide whether to control the compensator 220 to the common voltage.
  • the value is compensated.
  • the comparison of the signal encoding rather than the simple comparison of the voltage value, ensures the accuracy of the data comparison, and also reflects the intelligence of the entire driving circuit 200.
  • the analog-to-digital converter 260 includes: N resistors 261 connected in series, the resistor 261 is connected in series between the reference voltage and the low level to form N-1 divided voltages; the encoder 262, after the divided voltages Encode the common voltage of N-1; N-1 analog-to-digital conversion transistor 263, the first input terminal of the analog-to-digital conversion transistor 263 is connected to multiple voltage dividers, and the second input terminal is connected to the common voltage output by the initializer 210, the output The encoder is connected to the encoder 262; the encoder 262 encodes the common voltage output from the initiator 210 into a second signal and transmits it to the main controller 270.
  • the analog-to-digital converter 260 is divided into three parts.
  • the first part is a series of N resistors 261.
  • the resistor 261 is connected in series between the reference voltage and the low level to form N-1 points.
  • the second part of the encoder 262 encodes the divided common voltage, the third part of the N-1 analog-to-digital conversion transistor 263, the first input is connected to multiple voltage dividers, the second input is connected To the common voltage output from the initializer 210, the output terminal is connected to the encoder 262; the encoder 262 encodes the common voltage output from the initializer 210 into a second signal code and transmits it to the main controller 270, layer by layer division, strict deployment, Ensure the accuracy of data comparison.
  • the main controller 270 includes a decoder 271, which is coupled to the output terminal of the analog-to-digital converter 260, and decodes the second signal encoding transmitted from the analog-to-digital converter 260; the microcontroller 272, Coupling with the decoder 271, encoding the decoded second signal and the first signal encoding operation; the controller 273, coupled with the microcontroller 272, according to the comparison result of the microcontroller 272, decide whether to control the compensator 220 pair The value of the common voltage is compensated.
  • the main function of the main controller 270 is to compare the first signal encoding and the second signal encoding.
  • the comparison result determines whether to enable the compensation signal encoding of the compensation memory 221 to compensate the common voltage, and the decoder 271
  • the second signal code transmitted from the encoder 262 is decoded, and the microcontroller 272 compares the decoded second signal code with the first signal code, and the controller 273 controls the switch to be turned on and off according to the comparison result to decide whether to Compensating for the common voltage, this process undergoes layer-by-layer division and strict deployment to ensure the accuracy of data comparison and realize digitization and intelligence of the entire drive circuit 200.
  • the arithmetic circuit 280 includes: a digital-to-simulator 281, which converts the first signal transmitted from the initial memory 211 into an analog voltage; an output current amplifier 282, which outputs a common voltage; and the output terminal of the initial memory 211 passes
  • the first switch 240 is coupled to the input terminal of the digital-to-simulator 281, and the output terminal of the digital-to-simulator 281 is coupled to the input terminal of the output current amplifier 282; the output terminal of the output current amplifier 282 is the output terminal of the initializer 210;
  • the compensator 220 includes: a compensation memory 221 that stores a compensation signal code; an output terminal of the compensation memory 221 is coupled to the input terminal of the digital-to-simulator 281 of the initializer 210 through a second switch 250; In the digital-to-simulator 281, the first signal code is acquired.
  • our comparison is a comparison of the signal encoding after the voltage value is converted into a digital signal encoding.
  • the digital to simulator 281 converts the first signal encoding transmitted from the initial memory 211 into an analog voltage, and the output current amplifier 282 , Output common voltage; compensation memory 221, stores the compensation signal code; the main controller 270 obtains the first signal code from the digital-to-simulator 281.
  • the driving circuit 200 includes a control circuit board 300, and the initiator 210, the compensator 220, and the controller 230 are integrated in the control circuit board 300.
  • control circuit board 300 In this solution, the internal structure of the control circuit board 300 is completely changed, the output common voltage is reversely detected, and then converted into numbers for judgment, which can achieve very accurate and easy digital control.
  • the driving circuit 200 includes: an initial memory 211 that stores an initial value of a common voltage and a first corresponding to the initial value of the common voltage Signal encoding; the first switch 240 is connected to the control of the initial memory 211; when the difference between the initial value of the common voltage and the value of the output common voltage is less than the preset threshold, the initializer 210 is controlled to work normally; the digital to simulator 281, The first signal code transmitted from the initial memory 211 is converted into an analog voltage; the output current amplifier 282 is coupled to the output terminal of the digital-to-simulator 281, and the output terminal outputs a common voltage; the compensation memory 221 stores the compensation signal code; The second switch 250 is control connected to the compensation memory 221; when the difference between the initial value of the common voltage and the value of the output common voltage is greater than or equal to a preset threshold, the compensation memory 221 is controlled to work to compensate the value of the common voltage; N resistors 2
  • the design architecture diagram of the driving circuit 200 of this solution The general driving circuit 200 has three internal devices as shown in FIG. 6, an initial memory 211, a digital-to-simulator 281, and an output current amplifier 282.
  • the simulator 281 is converted into an analog voltage, and then the current is amplified by the output current amplifier 282, and finally output.
  • the design point of this solution is to add a compensation memory 221, a first switch, a second switch, a main controller 270 and an analog-to-digital device 260.
  • the specific working principle is to convert the common electric voltage actually output by the driving circuit 200 Collect back to the analog-to-digital device 260, and then convert the actual voltage into digital code through the ADC device.
  • the controller 273 reads the existing code in the digital-to-simulator for comparison at the same time. Assuming that the difference between the two codes exceeds the set standard, that is, the output voltage is too low at this time, then the controller 273 passes the controller 273 will turn off the switch 1 and turn on the switch 2, that is, start to use the code stored in the compensation memory 221, where the compensation code with a larger value is stored, that is, to compensate for the back-end load pumping by increasing the code Voltage drops.
  • This scheme has a simple design and is very suitable for occasions where the common voltage drifts.
  • the compensation standard can be set according to the actual situation. The difference in panel size and resolution will cause different results of the common voltage offset.
  • the driving method corresponds to the aforementioned driving circuit.
  • the driving circuit includes an initializer and a compensator.
  • the driving method steps include:
  • S53 Compare the initial value of the common voltage with the value of the output common voltage, and decide whether to control the compensator 220 to compensate the value of the common voltage.
  • the driving method of the driving circuit 200 is mainly to compare and compare the acquired data.
  • the common electric voltage signal output by the initializer 210 is first obtained, and then the value The initial value of the voltage is compared, and the comparison result determines whether to compensate.
  • the first signal code corresponding to the initial value of the common voltage is stored in the initializer 210; the compensation signal code of the common voltage is stored in the compensator 220;
  • step of obtaining the common voltage signal output by the initializer 210 after obtaining the value of the common voltage output by the initializer 210, there is a step of converting to the second signal encoding;
  • the second signal code is compared with the first signal code to determine whether the compensator 220 is controlled to compensate the value of the common voltage.
  • the way we take in the comparison is also different.
  • This comparison mainly converts the analog voltage into a digital code for comparison.
  • the digital comparison has higher data accuracy and the results are more convincing.
  • the public voltage In the step of comparing the initial value of the output and the value of the output common voltage, the second signal code is compared with the first signal code to determine whether to control the compensator 220 to compensate the value of the common voltage, when the difference between the two exceeds the setting The standard is compensated, and if it is not exceeded, the output is normal.
  • a display device 100 including a display panel 110; the display panel 110 includes a first substrate 120 and a second substrate 130, and the second substrate 130 and the first substrate 120 is oppositely arranged; the array layer 121 is formed on the first substrate 120; the common electrode 131 is formed on the second substrate 130; and the driving circuit 200 as above.
  • TN panel full name Twisted Nematic, namely twisted nematic panel
  • IPS panel In-Plane Switching, plane switching
  • VA panel Multi-domain Vertica Alignment, multi-quadrant vertical alignment technology

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Abstract

一种驱动电路(200)、驱动方法和显示装置(100)。驱动电路(200)包括：输出公共电压的初始器(210)，与初始器(210)耦接的补偿器(220)；以及控制器(230)；初始器(210)包括储存有公共电压的初始值的初始存储器(211)；以及将公共电压的初始值转化为输出的公共电压输出的运算电路(280)；控制器(230)采集初始器(210)的公共电压的初始值以及输出的公共电压的值，并对公共电压的初始值以及输出的公共电压的值比较，决定是否控制补偿器(220)对公共电压的值进行补偿。

Description

一种驱动电路、驱动方法和显示装置
本申请要求于2018年11月9日提交中国专利局、申请号为CN201811331793.X、发明名称为“一种显示面板、显示装置和制作方法”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，尤其涉及一种驱动电路、驱动方法和显示装置。
背景技术
这里的陈述仅提供与本申请相关的背景信息，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。
市场上的显示面板大部分控制过程都是比较简单，控制电路板内部都会有阻抗的存在，会导致显示画面受影响，无法保证显示面板的显示效果。
技术解决方案
本申请提供一种主动补偿公共电压的偏移，保证显示效果的驱动电路、驱动方法和显示装置。
为实现上述目的，本申请提供了一种驱动电路，所述驱动电路包括：初始器，输出公共电压；补偿器，与所述初始器耦接；控制器；所述初始器包括：初始存储器，储存有公共电压的初始值；运算电路，将公共电压的初始值转化为输出的公共电压输出；所述控制器采集初始器的公共电压的初始值以及输出的公共电压的值，并对所述公共电压的初始值以及输出的公共电压的值比较，决定是否控制所述补偿器对公共电压的值进行补偿。
本申请还公开了一种驱动电路，所述驱动电路包括：
初始存储器，储存有公共电压的初始值以及与所述公共电压的初始值对应的第一信号编码；
第一开关，与所述初始存储器控制连接；当所述公共电压的初始值以及输出的公共电压的值的差值小于预设阈值时，控制所述初始器正常工作；
数字转模拟器，将所述初始存储器传送过来的所述第一信号编码转化成模拟电压；
输出电流放大器，输入端与所述数字转模拟器的输出端耦接，输出端输出所述公共电压；
补偿存储器，存储补偿信号编码；
第二开关，与所述补偿存储器控制连接；当所述公共电压的初始值以及输出的公共电压的值的差值大于或等于预设阈值时，控制所述补偿存储器工作，对所述公共电压的值进行补偿；
串联的N个电阻，所述电阻串联在参考电压和低电平之间，形成N-1个分压；
编码器,对分压后的公共电压进行编码；
N-1个模数转换三极管，所述模数转换三极管的第一输入端分别连接到所述多个分压，第二输入端都连接到所述初始器输出的公共电压，输出端连接到所述编码器；所述编码器将所述初始器输出的公共电压进 行编码成第二信号编码并传送给所述主控器。
解码器，与所述模拟转数字器的输出端耦接，对所述模拟转数字器传送过来的第二信号编码进行解码；
微控制器，与所述解码器耦接，将解码后的第二信号编码与所述第一信号编码运算；
控制器，与所述微控制器耦接，根据所述微控制器的对比结果，决定是否控制所述补偿器对公共电压的值进行补偿；
所述驱动电路还包括控制电路板，所述初始存储器、第一开关、数字转模拟器、输出电流放大器、补偿存储器、第二开关、串联的N个电阻、编码器、N-1个模数转换三极管、解码器、微控制器和控制器均集成在所述控制电路板内。
本申请还公开了一种驱动方法，应用在一种驱动电路，所述驱动电路包括初始器和补偿器，步骤包括：
获取初始器输出的公共电压信号；
获取所述初始器中存储的公共电压的初始值；
对所述公共电压的初始值以及输出的公共电压的值比较，决定是否控制所述补偿器对公共电压的值进行补偿。
本申请还公开了一种显示装置，包括显示面板，所述显示面板包括：第一基板；第二基板，与所述第一基板相对设置；阵列层，形成于所述第一基板上；共电极，形成于所述第二基板上；以及如上所述的驱动电路。
随着液晶面板的解析度越来越高，尺寸越来越大，共电极的电流抽载越来越大，由于控制电路板内部阻抗的存在，那么随着电流越大，公共电压下降就会越多，公共电压会有不同的偏移状况发生，影响显示效果。同时因为公共电压也会受到阵列层的影响，阵列层是用来传递显示画面的数据，那么会随着显示的画面不同，公共电压也会有不同的偏移状况发生。增加一个补偿器，与初始器进行藕接，侦测实际输出的公共电压，当实际输出电压的公共电压偏移超过设定的标准后，驱动电路的公共电压下降越来越多的时候，启用补偿存储器内部补偿的信号编码， 补偿公共电压的偏移，实现公共电压的修正，保证显示效果，本设计简便易行。
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，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结构的示意图；
图2是本申请实施例一种驱动电路器的示意图；
图3是本申请实施例一种驱动电路的示意图；
图4是本申请实施例一种控制电路板结构的示意图；
图5是本申请实施例一种模拟转数字器结构的示意图；
图6是本申请实施例一种原驱动电路器的示意图；
图7是本申请实施例一种驱动方法步骤的示意图；
图8是本申请实施例一种显示装置的示意图。
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。
下面参考附图和较佳的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驱动电路200，驱动电路200包括输出公共电压的初始器210，还有与初始器210耦接的补偿器220，以及控制器230，初始器210则包括储存有公共电压的初始值的初始存储器211和将公共电压的初始值转化为输出的公共电压输出的运算电路280；控制器230采集初始器210的公共电压的初始值以及输出的公共电压的值，并对公共电压的初始值以及输出的公共电压的值比较，决定是否控制补偿器220对公共电压的值进行补偿。
本方案中，如图1所示，液晶面板分为下层的阵列层(array)和上层的共电极(common)，上层共电极的公共电压通常叫做VCOM，而随着液晶面板随着液晶面板的解析度越来越高，尺寸越来越大，共电极131的电流抽载越来越大，由于驱动电路200中内部阻抗的存在，那么随着电流越大，公共电压下降就会越多，公共电压会有不同的偏移状况发生，影响显示效果；同时因为公共电压也会受到阵列层121的影响，阵列层121是用来传递显示画面的数据，那么会随着显示的画面不同， 公共电压也会有不同的偏移状况发生。我们在驱动电路200上增加一个控制器230，控制器230采集初始器210的公共电压的初始值以及输出的公共电压的值，并对公共电压的初始值以及输出的公共电压的值比较，决定是否控制补偿器220对公共电压的值进行补偿公共电压的偏移，实现公共电压的修正，保证显示效果。
本实施例可选的，控制器230包括第一开关240和第二开关250，第一开关240与初始器210控制连接；当公共电压的初始值以及输出的公共电压的值的差值小于预设阈值时，控制初始器210正常工作；第二开关250与补偿器220控制连接；当公共电压的初始值以及输出的公共电压的值的差值大于或等于预设阈值时，控制补偿器220工作，对公共电压的值进行补偿。
本方案中，设置预设阈值，作为一个参考标准，此预设阈值考虑显示面板110的显示效果，面板尺寸和解析度的不同得出，由本领域的发明人根据具体的情况设置，超出预设阈值则认为公共电压超出容忍的范围，那么就进行补偿；公共电压的初始值以及输出的公共电压的值比较分为两种情况，当公共电压的初始值以及输出的公共电压的值的差值小于预设阈值时，第一开关240控制初始器210正常工作；当公共电压的初始值以及输出的公共电压的值的差值大于或等于预设阈值时，第二开关250控制补偿器220工作，对公共电压的值进行补偿。
本实施例可选的，初始存储器211储存与公共电压的初始值对应的第一信号编码；补偿器220存储有公共电压的补偿信号编码；控制器230包括：模拟转数字器260，采集初始器210输出的公共电压的值，并转换为第二信号编码；主控器270，采集初始器210的第一信号编码，并将第二信号编码与第一信号编码进行对比，决定是否控制补偿器220对公共电压的值进行补偿。
本方案中，初始存储器211储存与公共电压的初始值对应的第一信号编码；补偿器220中存储有公共电压的补偿信号编码；模拟转数字器260采集初始器210输出的公共电压的值，并转换为第二信号编码，此时主控器270将对第一信号编码和第二信号编码进行对比，根据对比 结果控制开关的接通和断开，决定是否控制补偿器220对公共电压的值进行补偿，此过程通过信号编码的比对，而非单纯的电压值的比较，更加保证了数据对比的精确性，也体现了整个驱动电路200的智能化。
本实施例可选的，模拟转数字器260包括：串联的N个电阻261，电阻261串联在参考电压和低电平之间，形成N-1个分压；编码器262,对分压后的公共电压进行编码；N-1个模数转换三极管263，模数转换三极管263的第一输入端分别连接到多个分压，第二输入端都连接到初始器210输出的公共电压，输出端连接到编码器262；编码器262将初始器210输出的公共电压进行编码成第二信号编码并传送给主控器270。
本方案中，如图5所示，模拟转数字器260分成了三个部分，第一部分是串联的N个电阻261，电阻261串联在参考电压和低电平之间，形成N-1个分压，第二部分编码器262,对分压后的公共电压进行编码，第三部分N-1个模数转换三极管263，第一输入端分别连接到多个分压，第二输入端都连接到初始器210输出的公共电压，输出端连接到编码器262；编码器262将初始器210输出的公共电压进行编码成第二信号编码并传送给主控器270，层层分工，严密部署，保证了数据对比的精确性。
本实施例可选的，主控器270包括：解码器271，与模拟转数字器260的输出端耦接，对模拟转数字器260传送过来的第二信号编码进行解码；微控制器272，与解码器271耦接，将解码后的第二信号编码与第一信号编码运算；控制器273，与微控制器272耦接，根据微控制器272的对比结果，决定是否控制补偿器220对公共电压的值进行补偿。
本方案中，主控器270的主要作用是将对第一信号编码和第二信号编码进行对比，通过对比结果来决定是否启用补偿存储器221的补偿信号编码对公共电压进行补偿，解码器271对编码器262传送过来的第二信号编码进行解码，微控制器272将解码后的第二信号编码与第一信号编码进行对比，控制器273根据对比结果控制开关的接通和断开，决定是否补偿公共电压，此过程经过层层分工，严密部署，保证了数据对比的精确性，实现了整个驱动电路200的数字化和智能化。
本实施例可选的，运算电路280包括：数字转模拟器281，将初始存储器211传送过来的第一信号编码转化成模拟电压；输出电流放大器282，输出公共电压；初始存储器211的输出端通过第一开关240与数字转模拟器281的输入端耦接，数字转模拟器281的输出端输出电流放大器282的输入端耦接；输出电流放大器282的输出端即为初始器210的输出端；
补偿器220包括：补偿存储器221，存储补偿信号编码；补偿存储器221的输出端通过第二开关250与初始器210的数字转模拟器281的输入端耦接；主控器270从初始器210的数字转模拟器281中，获取第一信号编码。
本方案中，我们的对比是由电压值转换为数字信号编码之后的信号编码的对比，数字转模拟器281，将初始存储器211传送过来的第一信号编码转化成模拟电压，而输出电流放大器282，输出公共电压；补偿存储器221，存储补偿信号编码；主控器270从数字转模拟器281中，获取到第一信号编码。
本实施例可选的，如图4所示，驱动电路200包括控制电路板300，初始器210和补偿器220、控制器230均集成在控制电路板300内。
本方案中，采用全部改变控制电路板300内部架构，反向侦测输出的公共电压，再转化为数字进行判断，可以做到非常精准且易于数字化控制。
作为本申请的另一实施例，参考图3所示，公开了一种驱动电路200，驱动电路200包括：初始存储器211，储存有公共电压的初始值以及与公共电压的初始值对应的第一信号编码；第一开关240，与初始存储器211控制连接；当公共电压的初始值以及输出的公共电压的值的差值小于预设阈值时，控制初始器210正常工作；数字转模拟器281，将初始存储器211传送过来的第一信号编码转化成模拟电压；输出电流放大器282，输入端与数字转模拟器281的输出端耦接，输出端输出公共电压；补偿存储器221，存储补偿信号编码；第二开关250，与补偿存储器221控制连接；当公共电压的初始值以及输出的公共电压的值的差 值大于或等于预设阈值时，控制补偿存储器221工作，对公共电压的值进行补偿；串联的N个电阻261，以N等于5为例，电阻261串联在参考电压和低电平之间，形成N-1个分压；编码器262,对分压后的公共电压进行编码；N-1个模数转换三极管263，模数转换三极管263的第一输入端分别连接到多个分压，第二输入端都连接到初始器210输出的公共电压，输出端连接到编码器262；编码器262将初始器210输出的公共电压进行编码成第二信号编码并传送给主控器270；解码器271，与模拟转数字器260的输出端耦接，对模拟转数字器260传送过来的第二信号编码进行解码；微控制器272，与解码器271耦接，将解码后的第二信号编码与第一信号编码运算；控制器273，与微控制器272耦接，根据微控制器272的对比结果，决定是否控制补偿器220对公共电压的值进行补偿；驱动电路200包括控制电路板300，初始存储器211、第一开关240、数字转模拟器281、输出电流放大器282、补偿存储器221、第二开关250、串联的N个电阻261、编码器262、N-1个模数转换三极管263、解码器271、微控制器272和控制器273均集成在控制电路板300内。
本方案的驱动电路200设计架构图，一般的驱动电路200如图6内部有三个器，初始存储器211，数字转模拟器281和输出电流放大器282，存储器中的信号编码(code)传送给数字转模拟器281，转化为模拟电压，然后再经过输出电流放大器282进行电流放大，最后进行输出。本方案的设计点是新增1个补偿存储器221、第一开关、第二开关、一个主控器270和一个模拟转数字器260，具体工作原理是，将驱动电路200实际输出的共电电压采集回模拟转数字器260，然后经ADC器将实际的电压转换为数字code，如图5所示，我们电阻选择是5个，模数转换三极管则为4个，模拟转数字器内部由标准电压(Vref)经电阻R1～R5进行分压，再送给模数转换三极管OP1～OP4的负输入端，VCOM电压作为OP的正输入端，当VCOM电压大于OP负输入端电压时，OP就输出为1，反之输出为0。这样，不同大小的VCOM电压就可以得到不同的code，实现了从模拟到数字的转换，如图5中所示，VCOM电压大小转换的code 为0011，然后这个code再经由编码器262进行编码后传送给主控器270，主控器270先由解码器271进行解码，然后再给控制器273进行比对。控制器273同时去读取数字转模拟器中现有的code去做比对，假设两者的code差异超过设定的标准，即认为此时输出电压过低，那么控制器273就通过控制器273将关闭开关1和接通开关2，即开始使用补偿存储器221中存储的code，这里面存储的是数值较大的补偿code，即通过code增大的方式去补偿由于后端负载抽载造成的电压下降。此方案设计简单，非常适合公共电压漂移的场合。其中补偿的标准可根据实际状况去设定，面板尺寸和解析度的不同，都会造成公共电压偏移程度的不同结果。
作为本申请的另一实施例，参考图7所示，公开了一种驱动方法，驱动方法对应上述的一种驱动电路，驱动电路包括初始器和补偿器，驱动方法步骤包括：
S51：获取初始器210输出的公共电压信号；
S52：获取初始器210中存储的公共电压的初始值；
S53：对公共电压的初始值以及输出的公共电压的值比较，决定是否控制补偿器220对公共电压的值进行补偿。
本方案中，驱动电路200的驱动方法，主要是进行比较，比较获取的数据，本次驱动方法，首先获取初始器210输出的共电电压信号，然后通过获得输出的共电电压的值与公共电压的初始值进行对比，通过对比结果决定是否进行补偿。
本实施例可选的，初始器210中存储的是与公共电压的初始值对应的第一信号编码；补偿器220中存储的是公共电压的补偿信号编码；
其中，获取初始器210输出的公共电压信号的步骤中，在获取初始器210输出的公共电压的值后，还有转换为第二信号编码的步骤；
对公共电压的初始值以及输出的公共电压的值比较的步骤中，将第二信号编码与第一信号编码进行对比，决定是否控制补偿器220对公共电压的值进行补偿。
本方案中，我们在比较的时候采取的方式也是不尽相同，本次对 比主要是将模拟电压转换为数字编码进行对比，数字化的对比，数据精确度更高，结果更具有说服力，公共电压的初始值以及输出的公共电压的值比较的步骤中，将第二信号编码与第一信号编码进行对比，决定是否控制补偿器220对公共电压的值进行补偿，当两者的差异超过设定的标准，便进行补偿，没有超过，则正常输出。
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100，包括显示面板110；显示面板110包括第一基板120和第二基板130，第二基板130与第一基板120相对设置；阵列层121形成于第一基板120上；共电极131，形成于第二基板130上；及如上的驱动电路200。
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TN面板(全称为Twisted Nematic，即扭曲向列型面板)、IPS面板(In-Plane Switching，平面转换)、VA面板(Multi-domain Vertica Alignment，多象限垂直配向技术)，当然，也可以是其他类型的面板，适用即可。
以上内容是结合具体的优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 (19)

  1. 一种驱动电路，包括：
    初始器，输出公共电压；
    补偿器，与所述初始器耦接；
    控制器；
    所述初始器包括：
    初始存储器，储存有公共电压的初始值；
    以及运算电路，将公共电压的初始值转化为输出的公共电压输出；
    其中，所述控制器采集初始器的公共电压的初始值以及输出的公共电压的值，并对所述公共电压的初始值以及输出的公共电压的值比较，决定是否控制所述补偿器对公共电压的值进行补偿。
  2. 如权利要求1所述的一种驱动电路，其中，所述控制器包括：
    第一开关，与所述初始器控制连接；当所述公共电压的初始值以及输出的公共电压的值的差值小于预设阈值时，控制所述初始器正常工作；
    第二开关，与所述补偿器控制连接；当所述公共电压的初始值以及输出的公共电压的值的差值大于或等于预设阈值时，控制所述补偿器工作，对所述公共电压的值进行补偿。
  3. 如权利要求2所述的一种驱动电路，其中，所述初始存储器储存与公共电压的初始值对应的第一信号编码；所述补偿器存储有公共电压的补偿信号编码。
  4. 如权利要求3所述的一种驱动电路，其中，所述控制器还包 括：
    模拟转数字器，采集所述初始器输出的公共电压的值，并转换为第二信号编码；
    以及主控器，采集所述初始器的第一信号编码，并将所述第二信号编码与所述第一信号编码进行对比，决定是否控制所述补偿器对公共电压的值进行补偿。
  5. 如权利要求4所述的一种驱动电路，其中，所述模拟转数字器包括：
    串联的N个电阻，所述电阻串联在参考电压和低电平之间，形成N-1个分压；
    编码器,对分压后的公共电压进行编码；
    以及N-1个模数转换三极管，所述模数转换三极管的第一输入端分别连接到所述多个分压，第二输入端都连接到所述初始器输出的公共电压，输出端连接到所述编码器；所述编码器将所述初始器输出的公共电压进行编码成第二信号编码并传送给所述主控器。
  6. 如权利要求5所述的一种驱动电路，其中，所述主控器包括：
    解码器，与所述模拟转数字器的输出端耦接，对所述模拟转数字器传送过来的第二信号编码进行解码；
    微控制器，与所述解码器耦接，将解码后的第二信号编码与所述第一信号编码运算；
    控制器，与所述微控制器耦接，根据所述微控制器的对比结果，决定是否控制所述补偿器对公共电压的值进行补偿。
  7. 如权利要求6所述的一种驱动电路，其中，所述运算电路包括：
    数字转模拟器，将所述初始存储器传送过来的所述第一信号编码转化成模拟电压；
    以及输出电流放大器，输出所述公共电压；
    所述初始存储器的输出端通过所述第一开关与所述数字转模拟器的输入端耦接，所述数字转模拟器的输出端输出电流放大器的输入端耦接；所述输出电流放大器的输出端即为所述初始器的输出端。
  8. 如权利要求7所述的一种驱动电路，其中，所述补偿器包括：
    补偿存储器，存储补偿信号编码；
    所述补偿存储器的输出端通过所述第二开关与所述初始器的数字转模拟器的输入端耦接；
    所述主控器从所述初始器的数字转模拟器中，获取所述第一信号编码。
  9. 如权利要求1所述的一种驱动电路，其中，所述驱动电路包括控制电路板，所述初始器和补偿器、控制器均集成在所述控制电路板内。
  10. 如权利要求8所述的一种驱动电路，其中，所述驱动电路包括控制电路板，所述初始器、补偿器和控制器均集成在所述控制电路板内。
  11. 一种驱动方法，对应一种驱动电路，所述驱动电路包括初始器和补偿器，步骤包括：
    获取初始器输出的公共电压信号；
    获取所述初始器中存储的公共电压的初始值；
    对所述公共电压的初始值以及输出的公共电压的值比较，决定是否控制所述补偿器对公共电压的值进行补偿。
  12. 如权利要求11所述的一种驱动方法，其中，所述初始器中存储的是与公共电压的初始值对应的第一信号编码；所述补偿器中存储的是公共电压的补偿信号编码。
  13. 如权利要求12所述的一种驱动方法，其中，获取初始器输出的公共电压信号的步骤中，在获取所述初始器输出的公共电压的值后，还有转换为第二信号编码的步骤；
    对所述公共电压的初始值以及输出的公共电压的值比较的步骤中，将所述第二信号编码与所述第一信号编码进行对比，决定是否控制所述补偿器对公共电压的值进行补偿。
  14. 一种显示装置，包括显示面板，所述显示面板包括：
    第一基板；
    第二基板，与所述第一基板相对设置；
    阵列层，形成于所述第一基板上；
    共电极，形成于所述第二基板上；
    驱动电路，驱动所述显示面板；
    所述驱动电路包括：
    初始器，输出公共电压；
    补偿器，与所述初始器耦接；
    控制器；
    所述初始器包括：
    初始存储器，储存有公共电压的初始值；
    以及运算电路，将公共电压的初始值转化为输出的公共电压输出；
    所述控制器采集初始器的公共电压的初始值以及输出的公共电压的值，并对所述公共电压的初始值以及输出的公共电压的值比较，决定是否控制所述补偿器对公共电压的值进行补偿。
  15. 如权利要求14所述的一种显示装置，其中，所述控制器包括：
    第一开关，与所述初始器控制连接；当所述公共电压的初始值以及输出的公共电压的值的差值小于预设阈值时，控制所述初始器正常工作；
    第二开关，与所述补偿器控制连接；当所述公共电压的初始值以及输出的公共电压的值的差值大于或等于预设阈值时，控制所述补偿器工作，对所述公共电压的值进行补偿。
    所述初始存储器储存与公共电压的初始值对应的第一信号编码；所述补偿器存储有公共电压的补偿信号编码；
    模拟转数字器，采集所述初始器输出的公共电压的值，并转换为第二信号编码；
    以及主控器，采集所述初始器的第一信号编码，并将所述第二信号编码与所述第一信号编码进行对比，决定是否控制所述补偿器对公共电压的值进行补偿。
  16. 如权利要求15所述的一种显示装置，其中，所述模拟转数字器包括：
    串联的N个电阻，所述电阻串联在参考电压和低电平之间，形成N-1个分压；
    编码器,对分压后的公共电压进行编码；
    以及N-1个模数转换三极管，所述模数转换三极管的第一输入端分别连接到所述多个分压，第二输入端都连接到所述初始器输出的公共电压，输出端连接到所述编码器；所述编码器将所述初始器输出的公共电压进行编码成第二信号编码并传送给所述主控器。
  17. 如权利要求16所述的一种显示装置，其中，所述主控器包括：
    解码器，与所述模拟转数字器的输出端耦接，对所述模拟转数字器传送过来的第二信号编码进行解码；
    微控制器，与所述解码器耦接，将解码后的第二信号编码与所述第一信号编码运算；
    以及控制器，与所述微控制器耦接，根据所述微控制器的对比结果，决定是否控制所述补偿器对公共电压的值进行补偿。
  18. 如权利要求17所述的一种显示装置，其中，所述运算电路包括：
    数字转模拟器，将所述初始存储器传送过来的所述第一信号编码转化成模拟电压；
    以及输出电流放大器，输出所述公共电压；
    所述初始存储器的输出端通过所述第一开关与所述数字转模拟器的输入端耦接，所述数字转模拟器的输出端输出电流放大器的输入端耦接；所述输出电流放大器的输出端即为所述初始器的输出端；
    所述补偿器包括：
    补偿存储器，存储补偿信号编码；
    所述补偿存储器的输出端通过所述第二开关与所述初始器的数字转模拟器的输入端耦接；
    所述主控器从所述初始器的数字转模拟器中，获取所述第一信号编码。
  19. 如权利要求18所述的一种显示装置，其中，所述驱动电路包括控制电路板，所述初始器、补偿器和控制器均集成在所述控制电路板内。
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