WO2017096686A1 - 液晶显示面板公共电压调整电路及液晶显示装置 - Google Patents

液晶显示面板公共电压调整电路及液晶显示装置 Download PDF

Info

Publication number
WO2017096686A1
WO2017096686A1 PCT/CN2016/070256 CN2016070256W WO2017096686A1 WO 2017096686 A1 WO2017096686 A1 WO 2017096686A1 CN 2016070256 W CN2016070256 W CN 2016070256W WO 2017096686 A1 WO2017096686 A1 WO 2017096686A1
Authority
WO
WIPO (PCT)
Prior art keywords
branch
common voltage
feedback
liquid crystal
crystal display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/070256
Other languages
English (en)
French (fr)
Inventor
曹丹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/916,580 priority Critical patent/US10083669B2/en
Publication of WO2017096686A1 publication Critical patent/WO2017096686A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • 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
    • G09G2310/0286—Details of a shift registers 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
    • G09G2310/0289—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
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes

Definitions

  • the present invention relates to the field of display, and in particular, to a liquid crystal display panel common voltage adjusting circuit and a liquid crystal display device.
  • the liquid crystal display device generally includes a backlight module and a liquid crystal display panel.
  • the backlight module is used to provide light for the liquid crystal display panel
  • the liquid crystal display panel is used for displaying text, images and the like.
  • a liquid crystal display panel is usually selected first, and the common voltage of the liquid crystal display panel is adjusted to optimize the display quality of the liquid crystal display panel for convenience.
  • the common voltage of the liquid crystal display panel is recorded as the first common voltage.
  • the common voltage of all the liquid crystal display panels mass-produced next is set to the first common voltage.
  • the common voltages to be loaded by the respective liquid crystal display panels may be different, that is, when the first common voltage is loaded in all liquid crystal display panels in mass production.
  • the display quality of the liquid crystal display panel which is mass-produced is not good.
  • the present invention provides a liquid crystal display panel common voltage adjustment circuit for adjusting a first common voltage applied to a liquid crystal display panel
  • the liquid crystal display panel common voltage adjustment circuit includes an acquisition unit, a control unit, a feedback unit, and an operation control unit
  • the acquisition unit is configured to collect a common voltage on the liquid crystal display panel as a second common voltage
  • the control unit is configured to receive the second common voltage, according to the second common a difference between the voltage and the standard common voltage sends a control signal
  • the feedback unit outputs a corresponding feedback under the control of the control signal Voltage
  • the operation regulating unit is configured to adjust the first common voltage according to the feedback voltage, and output the adjusted first common voltage
  • the adjusted first common voltage is loaded on the liquid crystal display panel
  • the display quality of the LCD panel is optimal.
  • the control unit includes a control subunit, a processing subunit, and the control subunit includes a first input end, a second input end, a first output end, and a second output end, where the first input end receives the a second common voltage, the second input terminal receives the standard common voltage, and the control subunit is configured to calculate a difference between the second common voltage and the standard common voltage and via the first output end
  • the second output terminal outputs, the processing subunit is configured to issue a control signal according to a difference between the second common voltage and the standard common voltage.
  • the feedback unit includes a selector, a plurality of first feedback branches and a second feedback branch, the selector includes an input end and a plurality of control signal output ends, and the input end of the selector and the The output end of the processing subunit is electrically connected to receive the control signal, and output a selection signal according to the control signal, and each control signal output end is connected to each first feedback branch in a one-to-one correspondence, the selection signal And a method for selectively turning on a first feedback branch to turn off the remaining first feedback branches, and the turned-on first feedback branch cooperates with the second feedback branch to output the feedback voltage.
  • the selector is an eight-select selector, and the input end of the selector includes a first signal input end, a second signal input end, and a third signal input end, and the control signal output end of the selector includes the first a control signal output end, a second control signal output end, a third control signal output end, a fourth control signal output end, a fifth control signal output end, a sixth control signal output end, a seventh control signal output end, and an eighth Control signal output end, correspondingly, the number of the first feedback branches is eight, respectively defined as a first branch, a second branch, a third branch, a fourth branch, a fifth branch, and a a sixth branch, a seventh branch, and an eighth branch, wherein one ends of the first branch to the eighth branch are respectively connected to the first control signal output end and the eighth control signal output end, and the first The other end of one road to the eighth branch is connected to the same node.
  • the first branch includes a first resistor and a first thin film transistor
  • the second branch includes a second resistor and a second thin film transistor
  • the third branch includes a third resistor and a third thin film transistor.
  • the fourth branch includes a fourth resistor and a fourth thin film transistor
  • the fifth branch includes a fifth resistor and a fifth thin film transistor
  • the sixth branch includes a sixth resistor and a sixth thin film transistor
  • the seventh branch includes a seventh resistor and a seventh thin film transistor
  • the eighth branch includes an eighth thin film transistor, each The gates of the thin film transistors are connected to each other, and the gates of the first to eighth thin film transistors are respectively connected to the first control signal output end to the eighth control signal output end, the first to seventh thin film transistors
  • the drains of the transistors are respectively connected to one ends of the resistors in the branch, and the other ends of the resistors in the branches are connected and connected to the drain of the eighth thin film transistor.
  • the resistance values of the first resistor, the second resistor, the third resistor, and the fourth resistor, the fifth resistor, the sixth resistor, and the seventh resistor are different.
  • the control subunit further includes a third output end, wherein the control subunit is further configured to generate a third common voltage according to a difference between the second common voltage and the standard common voltage, the third common voltage
  • the second feedback branch includes an eighth resistor, the eighth resistor is connected to the third output end, and the other end is connected to the drain of the eighth thin film transistor.
  • the selection signal when the control signals received by the first signal input end, the second signal input end and the third signal input end are sequentially 000, the selection signal turns on the first branch, and the remaining a feedback branch is turned off; when the control signals received by the first signal input end, the second signal input end, and the third signal input end are sequentially 001, the selection signal turns on the second branch The remaining first feedback branch is turned off; when the control signals received by the first signal input end, the second signal input end and the third signal input end are sequentially 010, the selection signal is turned on.
  • the third branch, the remaining first feedback branches are turned off; when the control signals received by the first signal input end, the second signal input end, and the third signal input end are sequentially 011,
  • the selection signal turns on the fourth branch, and the remaining first feedback branches are turned off; when the first signal input end, the second signal input end, and the third signal input end receive control signals
  • the order is 100
  • the selection is The signal turns on the fifth branch, and the remaining first feedback branches are turned off; when the first signal input end, the second signal input end, and the third signal input end receive the control signals are sequentially 101
  • the selection signal turns on the sixth branch, and the remaining first feedback branches are turned off; when the first signal input terminal, the second signal input terminal, and the third signal input terminal receive When the control signal is 110 in sequence, the selection signal turns on the seventh branch, and the remaining first feedback branches are turned off; when the first signal input end, the second signal input end, and the third When the control signal received by the signal input terminal is 111, the selection signal turns on the eighth branch, and the remaining first feedback
  • the operation control unit includes a shift register and an operational amplifier, and the shift register Receiving a reference voltage, the output of the shift register is connected to the operational amplifier, the operational amplifier includes a first end, a second end, and a third end, wherein the first end and the second end are An input end of the operational amplifier, the third end is an output end of the operational amplifier, the first end is connected to an output end of the shift register, and the second end is connected to the first feedback branch And the second feedback branch is configured to receive a feedback voltage, the third end is connected to the first feedback branch, and is configured to output the adjusted first common voltage.
  • the common voltage adjustment circuit of the liquid crystal display panel of the present invention is used for adjusting the first common voltage applied to the liquid crystal display panel.
  • the common voltage adjustment circuit of the liquid crystal display panel of the present invention includes an acquisition unit, a control unit, and feedback. Unit and arithmetic control unit.
  • the collecting unit collects the common voltage of the liquid crystal display panel as a second common voltage, and the control unit sends a control signal according to a difference between the second common voltage and a standard common voltage of the display area of the liquid crystal display panel.
  • the feedback unit outputs a feedback voltage under the control of the control signal
  • the operation regulating unit adjusts the first common voltage according to the feedback voltage and outputs the adjusted first common voltage
  • the adjusted first common voltage is loaded on the liquid crystal display panel
  • the display quality of the liquid crystal display panel is the best. It can be seen that the common voltage adjustment circuit of the liquid crystal display panel of the present invention can adjust the common voltage applied to the liquid crystal display panel for different liquid crystal display panels, and can also load the respective liquid crystal display panels when the liquid crystal display panel is mass-produced.
  • the common voltage is such that the display quality of the liquid crystal display panel is optimal.
  • the present invention also provides a liquid crystal display device comprising the liquid crystal display panel common voltage adjusting circuit according to any of the above embodiments.
  • FIG. 1 is a schematic diagram showing the circuit structure of a common voltage adjusting circuit of a liquid crystal display panel according to a preferred embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a liquid crystal display device according to a preferred embodiment of the present invention.
  • FIG. 1 is a schematic diagram showing the circuit structure of a common voltage adjusting circuit of a liquid crystal display panel according to a preferred embodiment of the present invention.
  • the liquid crystal display panel common voltage adjustment circuit 1 is configured to adjust a first common voltage applied to the liquid crystal display panel.
  • the liquid crystal display panel common voltage adjustment circuit 1 includes an acquisition unit 10, a control unit 30, a feedback unit 50, and an operation control unit 70.
  • the collecting unit 10 is configured to collect a common voltage of the liquid crystal display panel 2 as a second common voltage.
  • the control unit 30 is electrically connected to the collection unit 10, and the control unit 30 is configured to receive the second common voltage according to the standard of the second common voltage and the display area of the liquid crystal display panel 2 The difference in voltage gives a control signal.
  • the feedback unit 50 outputs a corresponding feedback voltage under the control of the control signal.
  • the operation control unit 70 is configured to adjust the first common voltage according to a feedback voltage, and output the adjusted first common voltage, and when the entire first common voltage is loaded on the liquid crystal display panel,
  • the display quality of the liquid crystal display panel 2 is optimal.
  • the display quality of the liquid crystal display panel 2 includes the display uniformity, the degree of residual image, the degree of flicker, and the like when the liquid crystal display panel 2 displays a screen.
  • the collecting unit 10 collects a common voltage of the display area with the worst display quality in the liquid crystal display panel 2.
  • the control unit 30 includes a control subunit 310 and a processing subunit 330.
  • the control subunit 310 includes a first input end 311, a second input end 312, a first output end 313, and a second output end 314.
  • the first input terminal 311 receives the second common voltage
  • the second input terminal 312 receives the standard common voltage
  • the first output terminal 313 and the second output terminal 314 are connected to the processing subunit
  • the control sub-unit 310 is configured to calculate a difference between the second common voltage and the standard common voltage and output the first output terminal 313 and the second output terminal 314.
  • the processing sub-unit 330 is configured to issue a control signal according to a difference between the second common voltage and the standard common voltage.
  • the feedback unit 50 includes a selector 510, a plurality of first feedback branches 530, and a second feedback branch 550.
  • the selector 510 includes an input end and a plurality of control signal output ends, and the selector 510 The input end is electrically connected to the output end of the processing subunit 330 for receiving the control signal, and outputting a selection signal according to the control signal, and each control signal output end is associated with each of the first feedback branches 530.
  • the selection signal is used to selectively turn on a first feedback branch 530 to close the remaining first feedback branch 530, and the opened first feedback branch 530 and the second feedback branch 550 cooperate to output The feedback voltage.
  • the selector 510 is an eight-select selector, and the selector includes three input ends.
  • the three input terminals are respectively named as the first signal input terminal A0 and the second signal.
  • the input terminal A1 and the second signal input terminal A2, the control signal output end of the selector 510 includes a first control signal output terminal b1, a second control signal output terminal b2, a third control signal output terminal b3, and a fourth control signal.
  • the number of the first feedback branches 530 is eight, which are respectively defined as a first branch 530a, a second branch 530b, a third branch 530c, a fourth branch 530d, a fifth branch 530e, and a sixth branch.
  • One ends of the first branch 530a to the 530h are respectively connected to the first control signal output terminal b1 to the eighth control signal output terminal b8, and the first branch 530a to the eighth branch 530h. The other end is connected to the same node.
  • one end of the first branch 530a is connected to the first control signal output end b1, and one end of the second branch 530b is connected to the second control signal output end b2, the third branch One end of the 530c is connected to the third control signal output end b3, one end of the fourth branch 530d is connected to the fourth control signal output end b4, and one end of the fifth branch 530e is connected to the first a control signal output terminal b5, one end of the sixth branch 530f is connected to the sixth control signal output terminal b6, and one end of the seventh branch 530g is connected to the seventh control signal output terminal b7 One end of the eighth branch 530h is connected to the eighth control signal output terminal b8.
  • the first branch 530a, the second branch 530b, the third branch 530c, the fourth branch 530d, the fifth branch 530e, the sixth branch 530f, the The seventh branch 530g and the other end of the eighth branch 530h are connected to the same node.
  • the first branch 530a includes a first resistor R1 and a first thin film transistor Q1
  • the second branch 530b includes a second resistor R2 and a second thin film transistor Q2
  • the third branch 530c includes a third resistor R3.
  • the fourth branch 530d includes a fourth resistor R4 and a fourth
  • the thin film transistor Q4 the fifth branch 530e includes a fifth resistor R5 and a fifth thin film transistor Q5
  • the sixth branch 530f includes a sixth resistor R6 and a sixth thin film transistor Q6, and the seventh branch 530g includes The seventh resistor R7 and the seventh thin film transistor Q7
  • the eighth branch 530h includes an eighth thin film transistor Q8.
  • Each of the thin film transistors includes a gate, a source, and a drain.
  • the gate is denoted by G in the figure
  • the source is denoted by S
  • the drain denoted by D.
  • the gates of the respective thin film transistors Q1 to the eighth thin film transistors Q8 are respectively connected to the first control signal output terminal b1 to the eighth control signal output terminal b8, the first film.
  • the drains of the transistors Q1 to Q7 are respectively connected to one end of the resistor in the branch, and the other end of the resistor in each branch is connected to the drain of the eighth thin film transistor Q8.
  • the source of the first thin film transistor Q1, the source of the second thin film transistor Q2, the source of the third thin film transistor Q3, the source of the fourth thin film transistor Q4, the The source of the fifth thin film transistor Q5, the source of the sixth thin film transistor Q6, the source of the seventh thin film transistor Q7, and the source of the eighth thin film transistor Q8 are connected to the same node.
  • a gate of the first thin film transistor Q1 is electrically connected to the first control signal output terminal b1
  • a gate of the second thin film transistor Q2 is electrically connected to the second control signal output terminal b2
  • the third a gate of the thin film transistor Q3 is electrically connected to the third control signal output terminal b3
  • a gate of the fourth thin film transistor Q4 is electrically connected to the fourth control signal output terminal b4
  • the fifth thin film transistor Q5 The gate is electrically connected to the fifth control signal output terminal b5, the gate of the sixth thin film transistor Q6 is electrically connected to the sixth control signal output terminal b6, and the gate of the seventh thin film transistor Q7 is electrically connected To the seventh control signal output terminal b7, the gate of the eighth thin film transistor Q2 is electrically connected to the eighth control signal output terminal b8.
  • the drain of the first thin film transistor Q1 is electrically connected to one end of the first resistor R1, the drain of the second thin film transistor Q2 is electrically connected to one end of the second resistor R2, and the third thin film transistor Q3
  • the drain is electrically connected to one end of the third resistor R3
  • the drain of the fourth thin film transistor Q4 is electrically connected to one end of the fourth resistor R4
  • the drain of the fifth thin film transistor Q5 is electrically connected to the fifth One end of the resistor R5
  • the drain of the sixth thin film transistor Q6 is electrically connected to one end of the sixth resistor R6, and the drain of the seventh thin film transistor Q7 is electrically connected to one end of the seventh resistor R7.
  • the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, and the seventh resistor R7 One end is connected to the same node as the drain of the eighth thin film transistor Q8.
  • the resistance of the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, and the seventh resistor R7 The values are different.
  • One end of the second feedback branch 550 is connected to the control subunit 310, and the other end is connected to each first feedback branch 530.
  • the second feedback branch 550 includes an eighth resistor R8.
  • the control subunit 310 further includes a third output end 315, and the control subunit 310 is further configured to use the second common voltage. And a difference between the standard common voltages generates a third common voltage, and the third common voltage is output via the third output terminal 315.
  • One end of the eighth resistor R8 is connected to the third output end 315, and the other end is connected to the drain of the eighth thin film transistor Q8.
  • the selection signal turns on the first branch 530a, and the rest The first feedback branch is closed.
  • the selection signal turns on the first branch.
  • Road 530a, the second branch 530b, the third branch 530c, the fourth branch 530d, the fifth branch 530e, the sixth branch 530f, and the seventh branch 530g And the eighth branch 530h is closed.
  • the selection signal turns on the second branch 530b, the remaining first feedback branches are turned off.
  • the selection signal turns on the third branch 530c, and the rest The first feedback branch is closed.
  • the selection signal turns on the fourth branch 530d, and the rest The first feedback branch is closed.
  • the selection signal turns on the fifth branch 530e, and the rest The first feedback branch is closed.
  • the selection signal turns on the sixth branch 530f, and the rest The first feedback branch is closed.
  • the selection signal turns on the seventh branch 530g and the remaining first feedback branches are turned off.
  • the selection signal turns on the eighth branch 530h, and the rest The first feedback branch is closed.
  • the operation control unit 70 includes a shift register 710 and an operational amplifier 730.
  • the shift register 710 is an eight-bit shift register
  • the receiving end of the shift register 710 receives the reference voltage V REF
  • the output of the shift register 710 is connected to the operational amplifier 730.
  • the operational amplifier 730 includes a first end 731, a second end 732, and a third end 733.
  • the first end 731 and the second end 732 are input ends of the operational amplifier 730
  • the third end 733 is an output end of the operational amplifier 730
  • the first end 731 is connected to the shift An output of the register 710
  • the second end 732 is connected to the first feedback branch 530 and the second feedback branch 550 for receiving the feedback voltage.
  • the second end 732 is connected to a node between the eighth resistor R8 and the drain of the eighth thin film transistor Q8.
  • the third end 733 is connected to the first feedback branch 530 and is configured to output the adjusted first common voltage. Specifically, the third end 733 is connected to each thin film transistor in the first feedback branch. Source.
  • the liquid crystal display panel common voltage adjusting circuit 1 of the present invention is used to adjust the first common voltage loaded by the liquid crystal display panel 2, and the liquid crystal display panel 2 includes the collecting unit 10, the control unit 30, and the feedback. Unit 50 and arithmetic control unit 70.
  • the collecting unit 30 collects the common voltage of the liquid crystal display panel 2 as the second common voltage
  • the control unit 30 receives the second common voltage, and sends a control signal according to the difference between the second common voltage and the standard common voltage of the display area of the liquid crystal display panel 2. .
  • the feedback unit outputs a feedback voltage under the control of the control signal, and the operation regulating unit adjusts the first common voltage according to the feedback voltage and outputs the adjusted first common voltage, and the adjusted first common voltage is loaded on the liquid crystal display panel
  • the display quality of the liquid crystal display panel is the best.
  • the common voltage adjustment circuit 1 of the liquid crystal display panel of the present invention can adjust the common voltage applied to the liquid crystal display panel 2 for different liquid crystal display panels 2, and can also display the liquid crystal display when the liquid crystal display panel 2 is mass-produced.
  • the panel 2 is loaded with a suitable common voltage to optimize the display quality of the liquid crystal display panel 2.
  • the present invention also provides a liquid crystal display device a. Please refer to FIG. 2.
  • FIG. 2 Please refer to FIG. 2.
  • the liquid crystal display device a includes a front
  • the liquid crystal display panel common voltage adjustment circuit is not described herein.
  • the liquid crystal display device a includes but is not limited to, but not limited to, a smart phone, a mobile device (MID), an e-book, a tablet computer, and a portable play station (Play Station Portable).
  • Portable devices such as PSP) or Personal Digital Assistant (PDA).

Landscapes

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

Abstract

一种液晶显示面板公共电压调整电路（1）及液晶显示装置。所述液晶显示面板公共电压调整电路（1）用于对液晶显示面板（2）加载的第一公共电压进行调整，所述液晶显示面板公共电压调整电路（1）包括采集单元（10）、控制单元（30）、反馈单元（50）及运算调控单元（70），所述采集单元（10）用于采集液晶显示面板（2）上的公共电压为第二公共电压，所述控制单元（30）用于接收所述第二公共电压，根据所述第二公共电压与所述标准公共电压的差值发出控制信号，所述反馈单元（50）在所述控制信号的控制下输出相应的反馈电压，所述运算调控单元（70）用于根据所述反馈电压对所述第一公共电压进行调整，并将调整后的所述第一公共电压输出，调整后的第一公共电压加载在液晶显示面板（2）上时，液晶显示面板（2）的显示品质最佳。

Description

液晶显示面板公共电压调整电路及液晶显示装置
本发明要求2015年12月7日递交的发明名称为“液晶显示面板公共电压调整电路及液晶显示装置”的申请号201510894344.6的在先申请优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本发明涉及显示领域，尤其涉及一种液晶显示面板公共电压调整电路及液晶显示装置。
背景技术
随着显示技术的发展，液晶显示装置由于具有体积小、功耗低等优点而得到广大用户的青睐。液晶显示装置通常包括背光模组及液晶显示面板，背光模组用于为液晶显示面板提供光线，液晶显示面板用于显示文字、图像等信息。现有技术中，在对液晶显示面板进行量产时，通常先选取一个液晶显示面板，将这个液晶显示面板的公共电压进行调整以使得所述液晶显示面板的显示品质达到最佳，为了方便描述，此时所述液晶显示面板的公共电压记为第一公共电压。接下来量产的所有液晶显示面板的公共电压则会被设置为第一公共电压。然而，由于液晶显示面板的各个部分的制程差异等因素，各个液晶显示面板所需要加载的公共电压会有所差别，即，所述第一公共电压加载在量产中的所有液晶显示面板中时，会导致量产的液晶显示面板的显示品质不佳。
发明内容
本发明提供一种液晶显示面板公共电压调整电路，所述液晶显示面板公共电压调整电路用于对液晶显示面板加载的第一公共电压进行调整，所述液晶显示面板公共电压调整电路包括采集单元、控制单元、反馈单元及运算调控单元，所述采集单元用于采集液晶显示面板上的公共电压为第二公共电压，所述控制单元用于接收所述第二公共电压，根据所述第二公共电压与所述标准公共电压的差值发出控制信号，所述反馈单元在所述控制信号的控制下输出相应的反馈 电压，所述运算调控单元用于根据所述反馈电压对所述第一公共电压进行调整，并将调整后的所述第一公共电压输出，调整后的第一公共电压加载在液晶显示面板上时，液晶显示面板的显示品质最佳。
其中，所述控制单元包括控制子单元、处理子单元，所述控制子单元包括第一输入端、第二输入端、第一输出端及第二输出端，所述第一输入端接收所述第二公共电压，所述第二输入端接收所述标准公共电压，所述控制子单元用于计算所述第二公共电压及所述标准公共电压的差值并经由所述第一输出端及所述第二输出端输出，所述处理子单元用于根据所述第二公共电压及所述标准公共电压的差值发出控制信号。
其中，所述反馈单元包括选择器、多个第一反馈支路及第二反馈支路，所述选择器包括输入端及多个控制信号输出端，且所述选择器的输入端与所述处理子单元的输出端电连接，用于接收所述控制信号，并根据所述控制信号输出选择信号，每个控制信号输出端与每个第一反馈支路一一对应相连，所述选择信号用于选择性地开启一个第一反馈支路关闭其余第一反馈支路，开启的第一反馈支路与所述第二反馈支路相配合以输出所述反馈电压。
其中，所述选择器为八选一选择器，所述选择器的输入端包括第一信号输入端、第二信号输入端及第三信号输入端，所述选择器的控制信号输出端包括第一控制信号输出端、第二控制信号输出端、第三控制信号输出端、第四控制信号输出端、第五控制信号输出端、第六控制信号输出端、第七控制信号输出端及第八控制信号输出端，相应地，所述第一反馈支路的数量为八个，分别定义为第一支路、第二支路、第三支路、第四支路、第五支路、第六支路、第七支路及第八支路，所述第一支路至第八支路的一端分别与第一控制信号输出端及第八控制信号输出端一一对应相连，所述第一支路至第八支路的另一端连接至同一节点。
其中，所述第一支路包括第一电阻及第一薄膜晶体管，所述第二支路包括第二电阻及第二薄膜晶体管，所述第三支路包括第三电阻及第三薄膜晶体管，所述第四支路包括第四电阻及第四薄膜晶体管，所述第五支路包括第五电阻及第五薄膜晶体管，所述第六支路包括第六电阻及第六薄膜晶体管，所述第七支路包括第七电阻及第七薄膜晶体管，所述第八支路包括第八薄膜晶体管，各个 薄膜晶体管的源极相连，所述第一薄膜晶体管至第八薄膜晶体管的栅极分别对应连接所述第一控制信号输出端至第八控制信号输出端，所述第一薄膜晶体管至第七薄膜晶体管中漏极分别连接所在支路中电阻的一端，各支路中电阻的另一端相连并且连接第八薄膜晶体管的漏极。
其中，所述第一电阻、所述第二电阻、所述第三电阻、所述第四电阻，所述第五电阻、所述第六电阻及所述第七电阻的电阻值各不相同。
其中，所述控制子单元还包括第三输出端，所述控制子单元还用于根据所述第二公共电压及所述标准公共电压的差值产生第三公共电压，所述第三公共电压经过所述第三输出端输出，所述第二反馈支路包括第八电阻，所述第八电阻一端连接所述第三输出端，另一端连接所述第八薄膜晶体管的漏极。
其中，当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为000时，所述选择信号开启所述第一支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为001时，所述选择信号开启所述第二支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为010时，所述选择信号开启所述第三支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为011时，所述选择信号开启所述第四支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为100时，所述选择信号开启所述第五支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为101时，所述选择信号开启所述第六支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为110时，所述选择信号开启所述第七支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为111时，所述选择信号开启所述第八支路，其余的第一反馈支路被关闭。
其中，所述运算调控单元包括移位寄存器及运算放大器，所述移位寄存器 的接收端接收参考电压，所述移位寄存器的输出端连接所述运算放大器，所述运算放大器包括第一端、第二端及第三端，所述第一端及所述第二端为所述运算放大器的输入端，所述第三端为所述运算放大器的输出端，所述第一端连接所述移位寄存器的输出端，所述第二端连接所述第一反馈支路及所述第二反馈支路，用于接收反馈电压，所述第三端连接所述第一反馈支路，并用于输出调整后的所述第一公共电压。
相较于现有技术，本发明的液晶显示面板公共电压调整电路用于对液晶显示面板加载的第一公共电压进行调整，本发明的液晶显示面板公共电压调整电路包括采集单元、控制单元、反馈单元及运算控制单元。采集单元采集液晶显示面板的公共电压为第二公共电压，控制单元并根据第二公共电压与液晶显示面板的显示区域的标准公共电压的差值发出控制信号。反馈单元在控制信号的控制下输出反馈电压，运算调控单元根据反馈电压对第一公共电压进行调整并将调整后的第一公共电压输出，调整后的第一公共电压加载在液晶显示面板上时，液晶显示面板的显示品质最佳。由此可见，本发明的液晶显示面板公共电压调整电路能够针对不同的液晶显示面板对液晶显示面板加载的公共电压进行调整，在液晶显示面板进行量产时也能给各个液晶显示面板加载合适的公共电压，以使得液晶显示面板的显示品质最佳。
本发明还提供了一种液晶显示装置，所述液晶显示装置包括前述任一实施方式所述的液晶显示面板公共电压调整电路。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明一较佳实施方式的液晶显示面板公共电压调整电路的电路结构示意图。
图2为本发明一较佳实施方式的液晶显示装置的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图1，图1为本发明一较佳实施方式的液晶显示面板公共电压调整电路的电路结构示意图。所述液晶显示面板公共电压调整电路1用于对液晶显示面板加载的第一公共电压进行调整，液晶显示面板公共电压调整电路1包括采集单元10、控制单元30、反馈单元50及运算调控单元70。所述采集单元10用于采集液晶显示面板2的公共电压为第二公共电压。所述控制单元30与所述采集单元10电连接，且所述控制单元30用于接收所述第二公共电压，根据所述第二公共电压与所述液晶显示面板2的显示区域的标准公共电压的差值发出控制信号。所述反馈单元50在所述控制信号的控制下输出相应的反馈电压。所述运算调控单元70用于根据反馈电压对所述第一公共电压进行调整，并将调整后的所述第一公共电压输出，整后的第一公共电压加载在液晶显示面板上时，所述液晶显示面板2的显示品质最佳。其中，所述液晶显示面板2的显示品质包括所述液晶显示面板2显示画面时的显示均匀度、画面残留程度、闪烁程度等等。优选地，所述采集单元10采集液晶显示面板2中显示品质最差的显示区域的公共电压。
所述控制单元30包括控制子单元310及处理子单元330。所述控制子单元310包括第一输入端311、第二输入端312、第一输出端313及第二输出端314。所述第一输入端311接收所述第二公共电压，所述第二输入端312接收所述标准公共电压，所述第一输出端313及所述第二输出端314连接所述处理子单元330，所述控制子单元310用于计算所述第二公共电压与所述标准公共电压的差值并经由所述第一输出端313及所述第二输出端314输出。所述处理子单元330用于根据所述第二公共电压及所述标准公共电压的差值发出控制信号。
所述反馈单元50包括选择器510、多个第一反馈支路530及第二反馈支路550。所述选择器510包括输入端及多个控制信号输出端，且所述选择器510 的输入端与所述处理子单元330的输出端电连接，用于接收所述控制信号，并根据所述控制信号输出选择信号，每个控制信号输出端与每个第一反馈支路530一一相对应相连，所述选择信号用于选择性地开启一个第一反馈支路530关闭其余第一反馈支路530，开启的第一反馈支路530与第二反馈支路550相互配合以输出所述反馈电压。
在本实施方式中，所述选择器510为八选一选择器，所述选择器包括三个输入端，为了方便描述，这三个输入端分别命名为第一信号输入端A0、第二信号输入端A1及第二信号输入端A2，所述选择器510的控制信号输出端包括第一控制信号输出端b1、第二控制信号输出端b2、第三控制信号输出端b3、第四控制信号输出端b4、第五控制信号输出端b5、第六控制信号输出端b6、第七控制信号输出端b7及第八控制信号输出端b8。相应地第一反馈支路530的数量为八个，分别定义为第一支路530a、第二支路530b、第三支路530c、第四支路530d、第五支路530e、第六支路530f、第七支路530g及第八支路530h。所述第一支路530a至第八支路530h的一端分别与第一控制信号输出端b1至第八控制信号输出端b8一一对应相连，所述第一支路530a至第八支路530h的另一端连接至同一节点。
具体地，所述第一支路530a的一端连接所述第一控制信号输出端b1，所述第二支路530b的一端连接至所述第二控制信号输出端b2，所述第三支路530c的一端连接至所述第三控制信号输出端b3，所述第四支路530d的一端连接至所述第四控制信号输出端b4，所述第五支路530e的一端连接至所述第五控制信号输出端b5，所述第六支路530f的一端连接至所述第六控制信号输出端b6，所述第七支路530g的一端连接至所述第七控制信号输出端b7，所述第八支路530h的一端连接至所述第八控制信号输出端b8。所述第一支路530a、所述第二支路530b、所述第三支路530c、所述第四支路530d、所述第五支路530e、所述第六支路530f、所述第七支路530g及所述第八支路530h的另一端连接至同一节点。
所述第一支路530a包括第一电阻R1及第一薄膜晶体管Q1，所述第二支路530b包括第二电阻R2及第二薄膜晶体管Q2，所述第三支路530c包括第三电阻R3及第三薄膜晶体管Q3，所述第四支路530d包括第四电阻R4及第四 薄膜晶体管Q4，所述第五支路530e包括第五电阻R5及第五薄膜晶体管Q5，所述第六支路530f包括第六电阻R6及第六薄膜晶体管Q6，所述第七支路530g包括第七电阻R7及第七薄膜晶体管Q7，所述第八支路530h包括第八薄膜晶体管Q8。各个薄膜晶体管包括栅极(Gate)、源极(Source)及漏极(Drain)，为了方便标记，在图中栅极用G表示，源极用S表示，漏极用D表示。各个薄膜晶体管的源极相连，所述第一薄膜晶体管Q1至第八薄膜晶体管Q8的栅极分别对应连接所述第一控制信号输出端b1至第八控制信号输出端b8，所述第一薄膜晶体管Q1至第七薄膜晶体管Q7的漏极分别连接所在支路中电阻的一端，各个支路中电阻的另一端连接第八薄膜晶体管Q8的漏极。换句话说，所述第一薄膜晶体管Q1的源极、所述第二薄膜晶体管Q2的源极、所述第三薄膜晶体管Q3的源极、所述第四薄膜晶体管Q4的源极、所述第五薄膜晶体管Q5的源极、所述第六薄膜晶体管Q6的源极、所述第七薄膜晶体管Q7的源极及所述第八薄膜晶体管Q8的源极连接至同一节点。所述第一薄膜晶体管Q1的栅极电连接至所述第一控制信号输出端b1，所述第二薄膜晶体管Q2的栅极电连接至所述第二控制信号输出端b2，所述第三薄膜晶体管Q3的栅极电连接至所述第三控制信号输出端b3，所述第四薄膜晶体管Q4的栅极电连接至所述第四控制信号输出端b4，所述第五薄膜晶体管Q5的栅极电连接至所述第五控制信号输出端b5，所述第六薄膜晶体管Q6的栅极电连接至所述第六控制信号输出端b6，所述第七薄膜晶体管Q7的栅极电连接至所述第七控制信号输出端b7，所述第八薄膜晶体管Q2的栅极电连接至所述第八控制信号输出端b8。所述第一薄膜晶体管Q1的漏极电连接所述第一电阻R1的一端，所述第二薄膜晶体管Q2的漏极电连接所述第二电阻R2的一端，所述第三薄膜晶体管Q3的漏极电连接所述第三电阻R3的一端，所述第四薄膜晶体管Q4的漏极电连接所述第四电阻R4的一端，所述第五薄膜晶体管Q5的漏极电连接所述第五电阻R5的一端，所述第六薄膜晶体管Q6的漏极电连接所述第六电阻R6的一端，所述第七薄膜晶体管Q7的漏极电连接所述第七电阻R7的一端。所述第一电阻R1、所述第二电阻R2、所述第三电阻R3、所述第四电阻R4、所述第五电阻R5、所述第六电阻R6及所述第七电阻R7的另一端与所述第八薄膜晶体管Q8的漏极连接至同一节点。
所述第一电阻R1、所述第二电阻R2、所述第三电阻R3、所述第四电阻R4、所述第五电阻R5、所述第六电阻R6及所述第七电阻R7的电阻值各不相同。
所述第二反馈支路550的一端连接所述控制子单元310，另一端连接至各个第一反馈支路530。具体地，所述第二反馈支路550包括第八电阻R8，相应地，所述控制子单元310还包括第三输出端315，所述控制子单元310还用于根据所述第二公共电压及所述标准公共电压的差值产生第三公共电压，所述第三公共电压经由所述第三输出端315输出。所述第八电阻R8的一端连接所述第三输出端315，另一端连接所述第八薄膜晶体管Q8的漏极。
当所述第一信号输入端A0、所述第二信号输入端A1及所述第三信号输入端A2接收的控制信号依次为000时，所述选择信号开启所述第一支路530a，其余的第一反馈支路被关闭。换句话说，当所述第一信号输入端A0、所述第二信号输入端A1及所述第三信号输入端A2接收的控制信号依次为000时，所述选择信号开启所述第一支路530a，所述第二支路530b、所述第三支路530c、所述第四支路530d、所述第五支路530e、所述第六支路530f、所述第七支路530g及所述第八支路530h被关闭。相应地，当所述第一信号输入端A0、所述第二信号输入端A1及所述第三信号输入端A2接收的控制信号依次为001时，所述选择信号开启所述第二支路530b，其余的第一反馈支路被关闭。当所述第一信号输入端A0、所述第二信号输入端A1及所述第三信号输入端A2接收的控制信号依次为010时，所述选择信号开启所述第三支路530c，其余的第一反馈支路被关闭。当所述第一信号输入端A0、所述第二信号输入端A1及所述第三信号输入端A2接收的控制信号依次为011时，所述选择信号开启所述第四支路530d，其余的第一反馈支路被关闭。当所述第一信号输入端A0、所述第二信号输入端A1及所述第三信号输入端A2接收的控制信号依次为100时，所述选择信号开启所述第五支路530e，其余的第一反馈支路被关闭。当所述第一信号输入端A0、所述第二信号输入端A1及所述第三信号输入端A2接收的控制信号依次为101时，所述选择信号开启所述第六支路530f，其余的第一反馈支路被关闭。当所述第一信号输入端A0、所述第二信号输入端A1及所述第三信号输入端A2接收的控制信号依次为110时，所述 选择信号开启所述第七支路530g，其余的第一反馈支路被关闭。当所述第一信号输入端A0、所述第二信号输入端A1及所述第三信号输入端A2接收的控制信号依次为111时，所述选择信号开启所述第八支路530h，其余的第一反馈支路被关闭。
所述运算调控单元70包括移位寄存器710及运算放大器730。在本实施方式中，所述移位寄存器710为八位移位寄存器，所述移位寄存器710的接收端接收参考电压VREF，所述移位寄存器710的输出端连接所述运算放大器730。所述运算放大器730包括第一端731、第二端732及第三端733。所述第一端731及所述第二端732为所述运算放大器730的输入端，所述第三端733为所述运算放大器730的输出端，所述第一端731连接所述移位寄存器710的输出端，所述第二端732连接所述第一反馈支路530及第二反馈支路550，用于接收所述反馈电压。具体地，所述第二端732连接所述第八电阻R8及所述第八薄膜晶体管Q8的漏极之间的节点。所述第三端733连接所述第一反馈支路530并用于输出调整后的所述第一公共电压，具体地，所述第三端733连接所述第一反馈支路中各个薄膜晶体管的源极。
相较于现有技术，本发明的液晶显示面板公共电压调整电路1用于对液晶显示面板2加载的第一公共电压进行调整，所述液晶显示面板2包括采集单元10、控制单元30、反馈单元50及运算控制单元70。采集单元30采集液晶显示面板2的公共电压为第二公共电压，控制单元30接收第二公共电压，并根据第二公共电压与液晶显示面板2的显示区域的标准公共电压的差值发出控制信号。反馈单元在控制信号的控制下输出反馈电压，运算调控单元根据反馈电压对第一公共电压进行调整并将调整后的第一公共电压输出，调整后的第一公共电压加载在液晶显示面板上时，液晶显示面板的显示品质最佳。由此可见，本发明的液晶显示面板公共电压调整电路1能够针对不同的液晶显示面板2对液晶显示面板2加载的公共电压进行调整，在液晶显示面板2进行量产时也能给各个液晶显示面板2加载合适的公共电压，以使得液晶显示面板2的显示品质最佳。本发明还提供了一种液晶显示装置a，请参阅图2，图2为本发明一较佳实施方式的液晶显示装置的结构示意图。所述液晶显示装置a包括前面 所述的液晶显示面板公共电压调整电路，在此不再赘述。在本实施方式中，所述液晶显示装置a包括但不仅限于包括但不仅限于智能手机(Smart Phone)、互联网设备(Mobile Internet Device，MID)、电子书、平板电脑、便携式播放站(Play Station Portable,PSP)或者个人数字助理(Personal Digital Assistant，PDA)等便携式设备。
以上所揭露的仅为本发明一种较佳实施例而已，当然不能以此来限定本发明之权利范围，本领域普通技术人员可以理解实现上述实施例的全部或部分流程，并依本发明权利要求所作的等同变化，仍属于发明所涵盖的范围。

Claims (18)

  1. 一种液晶显示面板公共电压调整电路，其中，所述液晶显示面板公共电压调整电路用于对液晶显示面板加载的第一公共电压进行调整，所述液晶显示面板公共电压调整电路包括采集单元、控制单元、反馈单元及运算调控单元，所述采集单元用于采集液晶显示面板上的公共电压为第二公共电压，所述控制单元用于接收所述第二公共电压，根据所述第二公共电压与所述标准公共电压的差值发出控制信号，所述反馈单元在所述控制信号的控制下输出相应的反馈电压，所述运算调控单元用于根据所述反馈电压对所述第一公共电压进行调整，并将调整后的所述第一公共电压输出，调整后的第一公共电压加载在液晶显示面板上时，液晶显示面板的显示品质最佳。
  2. 如权利要求1所述的液晶显示面板公共电压调整电路，其中，所述控制单元包括控制子单元、处理子单元，所述控制子单元包括第一输入端、第二输入端、第一输出端及第二输出端，所述第一输入端接收所述第二公共电压，所述第二输入端接收所述标准公共电压，所述控制子单元用于计算所述第二公共电压及所述标准公共电压的差值并经由所述第一输出端及所述第二输出端输出，所述处理子单元用于根据所述第二公共电压及所述标准公共电压的差值发出控制信号。
  3. 如权利要求2所述的液晶显示面板公共电压调整电路，其中，所述反馈单元包括选择器、多个第一反馈支路及第二反馈支路，所述选择器包括输入端及多个控制信号输出端，且所述选择器的输入端与所述处理子单元的输出端电连接，用于接收所述控制信号，并根据所述控制信号输出选择信号，每个控制信号输出端与每个第一反馈支路一一对应相连，所述选择信号用于选择性地开启一个第一反馈支路关闭其余第一反馈支路，开启的第一反馈支路与所述第二反馈支路相配合以输出所述反馈电压。
  4. 如权利要求3所述的液晶显示面板公共电压调整电路，其中，所述选择 器为八选一选择器，所述选择器的输入端包括第一信号输入端、第二信号输入端及第三信号输入端，所述选择器的控制信号输出端包括第一控制信号输出端、第二控制信号输出端、第三控制信号输出端、第四控制信号输出端、第五控制信号输出端、第六控制信号输出端、第七控制信号输出端及第八控制信号输出端，相应地，所述第一反馈支路的数量为八个，分别定义为第一支路、第二支路、第三支路、第四支路、第五支路、第六支路、第七支路及第八支路，所述第一支路至第八支路的一端分别与第一控制信号输出端及第八控制信号输出端一一对应相连，所述第一支路至第八支路的另一端连接至同一节点。
  5. 如权利要求4所述的液晶显示面板公共电压调整电路，其中，所述第一支路包括第一电阻及第一薄膜晶体管，所述第二支路包括第二电阻及第二薄膜晶体管，所述第三支路包括第三电阻及第三薄膜晶体管，所述第四支路包括第四电阻及第四薄膜晶体管，所述第五支路包括第五电阻及第五薄膜晶体管，所述第六支路包括第六电阻及第六薄膜晶体管，所述第七支路包括第七电阻及第七薄膜晶体管，所述第八支路包括第八薄膜晶体管，各个薄膜晶体管的源极相连，所述第一薄膜晶体管至第八薄膜晶体管的栅极分别对应连接所述第一控制信号输出端至第八控制信号输出端，所述第一薄膜晶体管至第七薄膜晶体管中漏极分别连接所在支路中电阻的一端，各支路中电阻的另一端相连并且连接第八薄膜晶体管的漏极。
  6. 如权利要求5所述的液晶显示面板公共电压调整电路，其中，所述第一电阻、所述第二电阻、所述第三电阻、所述第四电阻，所述第五电阻、所述第六电阻及所述第七电阻的电阻值各不相同。
  7. 如权利要求5所述的液晶显示面板公共电压调整电路，其中，所述控制子单元还包括第三输出端，所述控制子单元还用于根据所述第二公共电压及所述标准公共电压的差值产生第三公共电压，所述第三公共电压经过所述第三输出端输出，所述第二反馈支路包括第八电阻，所述第八电阻一端连接所述第三输出端，另一端连接所述第八薄膜晶体管的漏极。
  8. 如权利要求7所述的液晶显示面板公共电压调整电路，其中，当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为000时，所述选择信号开启所述第一支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为001时，所述选择信号开启所述第二支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为010时，所述选择信号开启所述第三支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为011时，所述选择信号开启所述第四支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为100时，所述选择信号开启所述第五支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为101时，所述选择信号开启所述第六支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为110时，所述选择信号开启所述第七支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为111时，所述选择信号开启所述第八支路，其余的第一反馈支路被关闭。
  9. 如权利要求8所述的液晶显示面板公共电压调整电路，其中，所述运算调控单元包括移位寄存器及运算放大器，所述移位寄存器的接收端接收参考电压，所述移位寄存器的输出端连接所述运算放大器，所述运算放大器包括第一端、第二端及第三端，所述第一端及所述第二端为所述运算放大器的输入端，所述第三端为所述运算放大器的输出端，所述第一端连接所述移位寄存器的输出端，所述第二端连接所述第一反馈支路及所述第二反馈支路，用于接收反馈电压，所述第三端连接所述第一反馈支路，并用于输出调整后的所述第一公共电压。
  10. 一种液晶显示装置，其中，所述液晶显示装置包括液晶显示面板公共电压调整电路，所述液晶显示面板公共电压调整电路用于对液晶显示面板加载的第一公共电压进行调整，所述液晶显示面板公共电压调整电路包括采集单元、控制单元、反馈单元及运算调控单元，所述采集单元用于采集液晶显示面板上的公共电压为第二公共电压，所述控制单元用于接收所述第二公共电压，根据所述第二公共电压与所述标准公共电压的差值发出控制信号，所述反馈单元在所述控制信号的控制下输出相应的反馈电压，所述运算调控单元用于根据所述反馈电压对所述第一公共电压进行调整，并将调整后的所述第一公共电压输出，调整后的第一公共电压加载在液晶显示面板上时，液晶显示面板的显示品质最佳。
  11. 如权利要求10所述的液晶显示装置，其中，所述控制单元包括控制子单元、处理子单元，所述控制子单元包括第一输入端、第二输入端、第一输出端及第二输出端，所述第一输入端接收所述第二公共电压，所述第二输入端接收所述标准公共电压，所述控制子单元用于计算所述第二公共电压及所述标准公共电压的差值并经由所述第一输出端及所述第二输出端输出，所述处理子单元用于根据所述第二公共电压及所述标准公共电压的差值发出控制信号。
  12. 如权利要求11所述的液晶显示装置，其中，所述反馈单元包括选择器、多个第一反馈支路及第二反馈支路，所述选择器包括输入端及多个控制信号输出端，且所述选择器的输入端与所述处理子单元的输出端电连接，用于接收所述控制信号，并根据所述控制信号输出选择信号，每个控制信号输出端与每个第一反馈支路一一对应相连，所述选择信号用于选择性地开启一个第一反馈支路关闭其余第一反馈支路，开启的第一反馈支路与所述第二反馈支路相配合以输出所述反馈电压。
  13. 如权利要求12所述的液晶显示装置，其中，所述选择器为八选一选择器，所述选择器的输入端包括第一信号输入端、第二信号输入端及第三信号输 入端，所述选择器的控制信号输出端包括第一控制信号输出端、第二控制信号输出端、第三控制信号输出端、第四控制信号输出端、第五控制信号输出端、第六控制信号输出端、第七控制信号输出端及第八控制信号输出端，相应地，所述第一反馈支路的数量为八个，分别定义为第一支路、第二支路、第三支路、第四支路、第五支路、第六支路、第七支路及第八支路，所述第一支路至第八支路的一端分别与第一控制信号输出端及第八控制信号输出端一一对应相连，所述第一支路至第八支路的另一端连接至同一节点。
  14. 如权利要求13所述的液晶显示装置，其中，所述第一支路包括第一电阻及第一薄膜晶体管，所述第二支路包括第二电阻及第二薄膜晶体管，所述第三支路包括第三电阻及第三薄膜晶体管，所述第四支路包括第四电阻及第四薄膜晶体管，所述第五支路包括第五电阻及第五薄膜晶体管，所述第六支路包括第六电阻及第六薄膜晶体管，所述第七支路包括第七电阻及第七薄膜晶体管，所述第八支路包括第八薄膜晶体管，各个薄膜晶体管的源极相连，所述第一薄膜晶体管至第八薄膜晶体管的栅极分别对应连接所述第一控制信号输出端至第八控制信号输出端，所述第一薄膜晶体管至第七薄膜晶体管中漏极分别连接所在支路中电阻的一端，各支路中电阻的另一端相连并且连接第八薄膜晶体管的漏极。
  15. 如权利要求14所述的液晶显示装置，其中，所述第一电阻、所述第二电阻、所述第三电阻、所述第四电阻，所述第五电阻、所述第六电阻及所述第七电阻的电阻值各不相同。
  16. 如权利要求14所述的液晶显示装置，其中，所述控制子单元还包括第三输出端，所述控制子单元还用于根据所述第二公共电压及所述标准公共电压的差值产生第三公共电压，所述第三公共电压经过所述第三输出端输出，所述第二反馈支路包括第八电阻，所述第八电阻一端连接所述第三输出端，另一端连接所述第八薄膜晶体管的漏极。
  17. 如权利要求16所述的液晶显示装置，其中，当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为000时，所述选择信号开启所述第一支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为001时，所述选择信号开启所述第二支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为010时，所述选择信号开启所述第三支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为011时，所述选择信号开启所述第四支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为100时，所述选择信号开启所述第五支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为101时，所述选择信号开启所述第六支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为110时，所述选择信号开启所述第七支路，其余的第一反馈支路被关闭；当所述第一信号输入端、所述第二信号输入端及所述第三信号输入端接收的控制信号依次为111时，所述选择信号开启所述第八支路，其余的第一反馈支路被关闭。
  18. 如权利要求17所述的液晶显示装置，其中，所述运算调控单元包括移位寄存器及运算放大器，所述移位寄存器的接收端接收参考电压，所述移位寄存器的输出端连接所述运算放大器，所述运算放大器包括第一端、第二端及第三端，所述第一端及所述第二端为所述运算放大器的输入端，所述第三端为所述运算放大器的输出端，所述第一端连接所述移位寄存器的输出端，所述第二端连接所述第一反馈支路及所述第二反馈支路，用于接收反馈电压，所述第三端连接所述第一反馈支路，并用于输出调整后的所述第一公共电压。
PCT/CN2016/070256 2015-12-07 2016-01-06 液晶显示面板公共电压调整电路及液晶显示装置 Ceased WO2017096686A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/916,580 US10083669B2 (en) 2015-12-07 2016-01-06 Liquid crystal display panel common voltage adjustment circuit and liquid crystal display device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510894344.6A CN105390107B (zh) 2015-12-07 2015-12-07 液晶显示面板公共电压调整电路及液晶显示装置
CN201510894344.6 2015-12-07

Publications (1)

Publication Number Publication Date
WO2017096686A1 true WO2017096686A1 (zh) 2017-06-15

Family

ID=55422328

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/070256 Ceased WO2017096686A1 (zh) 2015-12-07 2016-01-06 液晶显示面板公共电压调整电路及液晶显示装置

Country Status (3)

Country Link
US (1) US10083669B2 (zh)
CN (1) CN105390107B (zh)
WO (1) WO2017096686A1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106023877B (zh) * 2016-08-15 2019-02-19 京东方科技集团股份有限公司 公共电压调节电路、方法、显示面板和装置
CN106683603B (zh) 2017-01-10 2019-08-06 Oppo广东移动通信有限公司 一种闪屏处理方法及终端
CN109712581B (zh) * 2019-01-02 2021-01-29 京东方科技集团股份有限公司 公共电压补偿电路、显示驱动器和显示装置
CN109785811B (zh) * 2019-01-29 2021-03-02 重庆京东方光电科技有限公司 一种公共电压提供电路、液晶显示面板及其驱动方法
CN112327530A (zh) * 2020-12-01 2021-02-05 深圳市华星光电半导体显示技术有限公司 显示面板及显示装置
CN115881050A (zh) * 2022-10-26 2023-03-31 滁州惠科光电科技有限公司 公共电压调整系统、方法和显示面板

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11119743A (ja) * 1997-10-17 1999-04-30 Hoshiden Philips Display Kk 液晶表示装置
US20120162184A1 (en) * 2010-12-24 2012-06-28 Samsung Electronics Co., Ltd. Method of driving display panel and display apparatus for performing the same
US20120242641A1 (en) * 2011-03-24 2012-09-27 Kwangsae Lee Display device and method of operating the same
KR20130005657A (ko) * 2011-07-07 2013-01-16 엘지디스플레이 주식회사 액정표시장치와 그 공통전압 조정 방법
JP2013109095A (ja) * 2011-11-18 2013-06-06 Lg Display Co Ltd タッチパネルを備えた液晶表示装置およびその駆動方法
CN104050942A (zh) * 2014-06-10 2014-09-17 京东方科技集团股份有限公司 一种公共电压驱动补偿单元、方法和显示面板

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100357211B1 (ko) * 1995-04-19 2003-02-26 엘지.필립스 엘시디 주식회사 액정의 공통전극 구동회로
KR101157837B1 (ko) * 2004-12-30 2012-06-22 엘지디스플레이 주식회사 공통전압 보상회로 및 보상방법
KR101266762B1 (ko) * 2006-08-04 2013-05-28 엘지디스플레이 주식회사 액정표시장치 및 그의 구동 방법
KR101277937B1 (ko) * 2006-09-07 2013-06-27 엘지디스플레이 주식회사 액정표시장치 및 그의 구동 방법
US8941950B2 (en) 2012-05-23 2015-01-27 WD Media, LLC Underlayers for heat assisted magnetic recording (HAMR) media
KR101396688B1 (ko) * 2012-05-25 2014-05-19 엘지디스플레이 주식회사 액정표시장치 및 그 구동방법
KR101977592B1 (ko) * 2012-07-24 2019-05-13 엘지디스플레이 주식회사 공통전압 보상회로를 포함하는 액정표시장치
CN102842280B (zh) * 2012-08-31 2016-03-30 京东方科技集团股份有限公司 一种公共电压补偿电路、方法及液晶显示装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11119743A (ja) * 1997-10-17 1999-04-30 Hoshiden Philips Display Kk 液晶表示装置
US20120162184A1 (en) * 2010-12-24 2012-06-28 Samsung Electronics Co., Ltd. Method of driving display panel and display apparatus for performing the same
US20120242641A1 (en) * 2011-03-24 2012-09-27 Kwangsae Lee Display device and method of operating the same
KR20130005657A (ko) * 2011-07-07 2013-01-16 엘지디스플레이 주식회사 액정표시장치와 그 공통전압 조정 방법
JP2013109095A (ja) * 2011-11-18 2013-06-06 Lg Display Co Ltd タッチパネルを備えた液晶表示装置およびその駆動方法
CN104050942A (zh) * 2014-06-10 2014-09-17 京东方科技集团股份有限公司 一种公共电压驱动补偿单元、方法和显示面板

Also Published As

Publication number Publication date
CN105390107A (zh) 2016-03-09
US10083669B2 (en) 2018-09-25
US20170301307A1 (en) 2017-10-19
CN105390107B (zh) 2018-02-02

Similar Documents

Publication Publication Date Title
WO2017096686A1 (zh) 液晶显示面板公共电压调整电路及液晶显示装置
CN101452688B (zh) 显示装置、其驱动方法及使用该显示装置的电子设备
CN101191923B (zh) 可改善显示品质的液晶显示系统及相关驱动方法
CN104700768B (zh) 一种公共电压补偿电路、其补偿方法及显示装置
WO2020173207A1 (zh) 伽马电压生成电路、驱动电路及显示装置
KR101920885B1 (ko) 표시 장치 및 그 구동 방법
US20160370922A1 (en) Buffer unit, touch-control driving circuit, display device and driving method thereof
US9280927B2 (en) Display device, imaging device and gray level voltage generation circuit
US20150279524A1 (en) Gamma resistor adjusting device, driving circuit and display device
WO2015109801A1 (zh) 伽马参考电压产生装置及显示器
CN105513527A (zh) 一种公共电压补偿电路、补偿方法及显示面板
JP2003347926A (ja) レベルシフト回路、表示装置および携帯端末
US9455698B2 (en) Gate driver and display device including the same
CN108630158B (zh) 驱动电路和电子设备
TWI415088B (zh) 用於液晶顯示裝置之源極驅動電路
CN105931594A (zh) 像素电路、驱动方法、阵列基板、显示面板和显示装置
TWI682377B (zh) 一種顯示裝置
CN106531111B (zh) 像素电路及其驱动方法、显示装置
CN212061814U (zh) 伽马电压调整电路及显示装置
TW200643870A (en) Apparatus and methods for controlled transition between charge sharing and video output in a liquid crystal display
TW201804454A (zh) 輸出緩衝裝置
CN102376239B (zh) 显示装置的像素电路
TWI431583B (zh) 顯示裝置的像素電路
US9318037B2 (en) Apparatus for eliminating image sticking, display device and method for eliminating image sticking
CN106406614B (zh) 一种分时驱动电路及显示面板

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 14916580

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16871897

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16871897

Country of ref document: EP

Kind code of ref document: A1