WO2018192240A1 - 显示装置及基准电压产生方法 - Google Patents

显示装置及基准电压产生方法 Download PDF

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Publication number
WO2018192240A1
WO2018192240A1 PCT/CN2017/115715 CN2017115715W WO2018192240A1 WO 2018192240 A1 WO2018192240 A1 WO 2018192240A1 CN 2017115715 W CN2017115715 W CN 2017115715W WO 2018192240 A1 WO2018192240 A1 WO 2018192240A1
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WO
WIPO (PCT)
Prior art keywords
voltage
switch
signal
latch
output
Prior art date
Application number
PCT/CN2017/115715
Other languages
English (en)
French (fr)
Inventor
陈猷仁
Original Assignee
惠科股份有限公司
重庆惠科金渝光电科技有限公司
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Application filed by 惠科股份有限公司, 重庆惠科金渝光电科技有限公司 filed Critical 惠科股份有限公司
Priority to US16/090,852 priority Critical patent/US11056073B2/en
Publication of WO2018192240A1 publication Critical patent/WO2018192240A1/zh

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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
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
    • G05F3/20—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
    • G05F3/24—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations wherein the transistors are of the field-effect type only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—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
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD
    • 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

Definitions

  • the present application relates to the field of electronic circuit technologies, and in particular, to a display device and a reference voltage generating method.
  • TFT-LCD thin film transistor liquid crystal display device
  • the display device is driven by a voltage to provide a liquid crystal deflection reference voltage VCOM when the liquid crystal molecules in the panel need to be deflected during the display operation.
  • the reference voltage VCOM can pass through a DVR (Digital) on a circuit board connected to the display device panel.
  • Voltage Regulator, Digital Voltage Regulator, or Mechanical VR Voltage Regulator, voltage regulator
  • the high cost of DVR and mechanical VR leads to high overall production cost of electronic equipment, which is not conducive to the promotion and use of display devices.
  • the main object of the present application is to provide a display device and a reference voltage generating method that can obtain an adjustable reference voltage using the structure of the display device.
  • the present application provides a display device including a display area, a fan-out area, and a reference voltage generating circuit formed in the fan-out area, the reference voltage generating circuit including:
  • a multi-channel voltage conversion module configured to input a first DC voltage and a second DC voltage, and output a plurality of third DC voltages of different voltage values
  • a latch module for inputting the multi-way latch signal and the strobe signal, and outputting a corresponding switch control signal according to the input multi-channel latch signal and the strobe signal;
  • a gate switch matrix having a plurality of switch branches for controlling the plurality of third DC voltage outputs for turning on a corresponding switch branch according to the switch control signal when receiving the switch control signal
  • the third DC voltage corresponding to the voltage value is output.
  • the latch module includes a plurality of first input ends, and the first input end and the second input end of the multi-channel voltage conversion module are respectively configured to input a first DC voltage and a second DC voltage;
  • the switch branch includes an input end, an output end, and a controlled end
  • the latch module includes a plurality of first input ends, a plurality of second input ends, and a plurality of output ends;
  • the first input end and the second input end of the multi-channel voltage conversion module are respectively configured to input a first DC voltage and a second DC voltage, and the plurality of output ends of the multi-channel voltage conversion module and the plurality of the switch branches
  • the input ends of the switches are connected one-to-one; the output ends of the plurality of switch branches are used for outputting the third DC voltage corresponding to the voltage value; and the plurality of first inputs of the latch module are used for accessing a latching signal, a plurality of second inputs of the latch module for inputting a strobe signal, the plurality of outputs of the latch module being in one-to-one correspondence with the controlled ends of the plurality of switch branches connection.
  • a switch control signal outputted by an output end of the latch module is a strobe signal input at this time, and when the latch signal is a second level When the signal is output, the output maintains the previous switch control signal output state, and the strobe signal at this time is invalid.
  • the multiple voltage conversion module includes N voltage dividing resistors, and each of the voltage dividing resistors has the same resistance value, and is sequentially connected in series to the first input end and the second input of the multiple voltage converting module. Between the ends.
  • the N voltage dividing resistors divide the difference between the first DC voltage and the second DC voltage into the third DC voltage of the N+1 segment voltage value and output the same.
  • the number of the switch branches is N+1, and the N+1 switch branches each have M switch tubes arranged in series, thereby forming the M row and the N+1 column.
  • N 2M-1.
  • the latch module includes M latches corresponding to the M gate row of the gate switch matrix, and the output ends of the latches are in the same row as the gate switch matrix.
  • the controlled ends of the switch tubes are connected one by one.
  • each of the latches outputs a corresponding switch control signal to control conduction of the switch tube in the corresponding switch branch by using a binary code principle.
  • the display device further includes an S-COF (Source-Chip on Film): a source chip-on-film chip, a G-COF (Gate-Chip on Film): a gate-clad film chip; the S-COF and the G-COF are connected to the display region.
  • S-COF Source-Chip on Film
  • G-COF Gate-Chip on Film
  • the application also provides a reference voltage generating method, comprising the following steps:
  • the control multi-channel voltage conversion module inputs the first DC voltage and the second DC voltage, and converts the input first DC voltage and the second DC voltage, and outputs a plurality of third DC voltages of different voltage values;
  • the control latch module inputs the multi-way latch signal and the strobe signal, and outputs a corresponding switch control signal according to the input multi-channel latch signal and the strobe signal;
  • the gate switch matrix when receiving the switch control signal, turns on a corresponding switch branch in the gate switch matrix according to the switch control signal to output the third DC voltage corresponding to the voltage value;
  • the DC power source is the reference voltage.
  • the switch control signal outputted by the output end of the latch module is a strobe signal input at this time, and when the latch signal is a second level signal The output maintains the previous switch control signal output state, and the strobe signal at this time is invalid.
  • the multi-channel voltage conversion module uses N voltage dividing resistors to divide the difference between the first DC voltage and the second DC voltage into a third DC voltage of the N+1 segment voltage value and output the same.
  • the latch module uses M latches to respectively control the on/off of the corresponding switch tube corresponding to the row direction of the multiplex switch branch.
  • the present application further provides a display device including a display area, a fan-out area, and a reference voltage generating circuit formed in the fan-out area, wherein the reference voltage generating circuit includes:
  • a multi-channel voltage conversion module configured to input a first DC voltage and a second DC voltage, and output a plurality of third DC voltages of different voltage values
  • a latch module for inputting the multi-way latch signal and the strobe signal, and outputting a corresponding switch control signal according to the input multi-channel latch signal and the strobe signal;
  • a gate switch matrix having a plurality of switch branches for controlling the plurality of third DC voltage outputs for turning on a corresponding switch branch according to the switch control signal when receiving the switch control signal Outputting the third DC voltage corresponding to the voltage value;
  • the multi-channel voltage conversion module includes N voltage dividing resistors, and the N voltage dividing resistors are resistors having the same resistance value formed by the same process on the fan-out area.
  • the present application also provides an electronic device including a circuit board and a display device as described above, the circuit board being connected to the display area via a fan-out area of the display device; wherein the display device includes a display area and a fan An output area and a reference voltage generating circuit formed in the fan-out area, the reference voltage generating circuit comprising: a multi-channel voltage conversion module for inputting the first DC voltage and the second DC voltage, and outputting different voltage values a third DC voltage; a latch module for inputting the multi-way latch signal and the strobe signal, and outputting a corresponding switch control signal according to the input multi-channel latch signal and the strobe signal; the gate switch matrix has Controlling, by the plurality of the third DC voltage output, the plurality of switch branches, when receiving the switch control signal, turning on the corresponding switch branch according to the switch control signal to output a corresponding voltage value Said third DC voltage.
  • the present invention sets a multi-channel voltage conversion module to divide the difference between the first DC voltage and the second DC voltage into multiple different voltage values and output them, thereby forming a corresponding third DC voltage, and setting a latch through a module, inputting a multi-channel latch signal and a strobe signal, and outputting a corresponding switch control signal according to the input multi-channel latch signal and the strobe signal to control the gate switch matrix to turn on the corresponding switch according to the switch control signal a branch, thereby outputting the third DC voltage corresponding to the voltage value.
  • the staff only needs to check the display state of the current liquid crystal panel, and adjust the third DC voltage outputted by the switch branch according to the degree of flicker of the liquid crystal panel. When the degree of flicker is the lowest, the panel performs best.
  • the display device of the present application forms a reference voltage generating circuit by using a multi-channel voltage conversion module, a latch module and a gate switch module of a fan-out area, and the circuit structure is simple and easy to implement, thereby reducing the overall production cost of the electronic device. high.
  • the reference voltage generating circuit can adjust the reference voltage generated by using the DVR and the mechanical VR, and the display effect of the liquid crystal panel is superior.
  • the reference voltage since the reference voltage is generated in the display device, it is not necessary to consider the problem that the C-board does not correspond to the liquid crystal panel assembly, and it is convenient for later transportation and installation.
  • FIG. 1 is a schematic diagram of functional modules of an embodiment of a display device of the present application.
  • FIG. 2 is a schematic diagram showing the circuit structure of a reference voltage generating circuit in the apparatus of FIG. 1;
  • FIG. 3 is a schematic diagram showing a specific circuit structure of an embodiment of the reference voltage generating circuit of FIG. 2;
  • FIG. 4 is a truth table of a switch voltage corresponding to a third DC voltage output in the reference voltage generating circuit of FIG. 3;
  • FIG. 5 is a flow chart of an embodiment of a method for generating a reference voltage according to the present application.
  • the directional indication is only used to explain in a certain posture (as shown in the drawing)
  • first”, “second”, etc. in the embodiments of the present application, the description of "first”, “second”, etc. is used for descriptive purposes only, and is not to be construed as an Its relative importance or implicit indication of the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. Nor is it within the scope of protection required by this application.
  • the present application provides a display device suitable for use in video electronic devices such as computers, televisions, and mobile phones.
  • the display device includes a fan-out area 100, a display area 200, and a reference voltage generating circuit (not shown) formed in the fan-out area 100.
  • the system board on the electronic device connects the R/G/B compression signal, control signal and power supply voltage to the connector of the C-Board (control board) through the wire, R/G/B compression signal, control signal and power supply voltage, etc.
  • Data passes through TCON on the C-board (Sequence Controller) IC processing, transmission to the board via FFC (Flexible Flat Cable), the board passes S-COF on the fan-out area 100 (Source-Chip on Film): Source flip chip, G-COF (Gate-Chip on Film): The gate flip chip is connected to the display area 200, so that the display area 200 obtains the required operating power voltage and operates according to the control signal.
  • the display device display area 200 is driven by voltage, and a reference voltage VCOM is required during display. Due to the instability of the process, the optimal reference voltage of the display area 200 of each display device, that is, the liquid crystal panel is different, and needs to be adjusted according to the actual characteristics of the liquid crystal panel. In general, the reference voltage is mostly through the DVR on the board or C-Board (Digital Voltage Regulator, Digital Voltage Regulator, or Mechanical VR (Voltage The Regulator, the voltage regulator, is generated and output to the liquid crystal panel to drive the liquid crystal panel to operate.
  • C-Board Digital Voltage Regulator, Digital Voltage Regulator, or Mechanical VR
  • Voltage The Regulator the voltage regulator
  • the high cost of DVR and mechanical VR leads to high overall production cost of electronic equipment, which is not conducive to the popularization of display devices.
  • the reference voltage when the reference voltage is generated by C-Board, C-board and liquid crystal are used for convenient transportation at the factory.
  • the panel is packaged and shipped separately, and the LCD panel selected by the user does not correspond to the C-Board, so that the LCD panel corresponds to the non-optimal value of the reference voltage in the C-board, which causes the screen to flicker and the display effect is not good.
  • a reference voltage generating circuit formed in the fan-out area 100 of the display device is proposed.
  • the reference voltage generating circuit is formed in the fan-out area 100, and the generated reference voltage is adjustable.
  • the reference voltage generating circuit includes a multi-channel voltage conversion module 10, a latch module 20, and a gate switch matrix 30.
  • the first input end and the second input end of the multi-channel voltage conversion module 10 are respectively configured to input a first DC voltage VCC1 and a second DC voltage VCC2, and multiple outputs of the multi-channel voltage conversion module 10 Connected to the input ends of the plurality of switch branches in one-to-one correspondence; the output ends of the plurality of switch branches are used to output the third DC voltage VCC3 corresponding to the voltage value;
  • the first input is for inputting a latch signal
  • the plurality of second inputs of the latch module 20 are for inputting a strobe signal
  • the plurality of outputs of the latch module 20 are multiplexed
  • the controlled ends of the switch branches are connected one-to-one.
  • the multi-channel voltage conversion module 10 is configured to input a first DC voltage VCC1 and a second DC voltage, and output a plurality of third DC voltages VCC3 of different voltage values; the first DC voltage VCC1 and the second DC voltage pass through the circuit board Input, and respectively the upper and lower limits of the reference voltage adjustment, the multi-channel voltage conversion module 10 divides the difference between the first DC voltage VCC1 and the second DC voltage into multiple different voltage values and outputs them to form a corresponding third DC voltage. VCC3.
  • the latch module 20 is configured to input the multi-channel latch signal and the strobe signal, and output a corresponding switch control signal according to the input multi-latch signal and the strobe signal; when the latch signal is at a logic level H (high At the level), the switch control signal outputted from the output terminal B of the latch module 20 is the strobe signal input at this time. When the latch signal is at the logic level L (low level), the output terminal maintains the previous switch. Control signal output status, the strobe signal at this time is invalid.
  • the strobe switch matrix 30 has a plurality of switch branches for controlling the output of the multiplexed third DC voltage VCC3, and is configured to turn on the corresponding switch branch according to the switch control signal when receiving the switch control signal And outputting the third DC voltage VCC3 corresponding to the voltage value.
  • the switch branch When the corresponding switch branch is turned on, the switch branch outputs the third DC voltage VCC3 corresponding to the voltage value of the multi-channel voltage conversion module 10 at this time.
  • the present application sets the multi-channel voltage conversion module 10 to divide the difference between the first DC voltage VCC1 and the second DC voltage into multiple different voltage values and output them, thereby forming a corresponding third DC voltage VCC3, and setting
  • the latch module 20 inputs the multi-channel latch signal and the strobe signal, and outputs a corresponding switch control signal according to the input multiplexed latch signal and the strobe signal to control the strobe switch matrix 30 according to the switch control signal
  • the corresponding switching branch is turned on to output the third DC voltage VCC3 corresponding to the voltage value.
  • the staff only needs to check the display state of the current liquid crystal panel, and adjust the third DC voltage VCC3 outputted by the switch branch according to the degree of flicker of the liquid crystal panel.
  • the display device of the present application forms a reference voltage generating circuit by using a multi-channel voltage conversion module 10, a latch module 20, and a gate switch module of the fan-out area 100.
  • the circuit structure is simple and easy to implement, thereby reducing the electronic equipment. The overall production cost is high.
  • the reference voltage generating circuit can adjust the reference voltage generated by using the DVR and the mechanical VR, and the display effect of the liquid crystal panel is superior.
  • the reference voltage is generated in the display device, it is not necessary to consider the problem that the C-board does not correspond to the liquid crystal panel assembly, and it is convenient for later transportation and installation.
  • the multi-channel voltage conversion module 10 includes N voltage dividing resistors, as shown in FIG. 2, which are R1, R2, ... RN-1, RN.
  • Each of the voltage dividing resistors R1, R2, ..., RN-1, RN has the same resistance value, and is sequentially connected in series between the first input terminal and the second input terminal of the multi-channel voltage conversion module 10.
  • the plurality of voltage dividing resistors are resistors having the same resistance value formed by the same process on the fan-out area 100. Since the voltage dividing resistors share the same process as other modules of the display device, no additional cost is added and the implementation is easy. N voltage-dividing resistors having the same resistance value are sequentially connected in series between the first input end and the second input end, and the difference between the first DC voltage VCC1 and the second DC voltage is equally divided into N+1 segment voltage values. Three DC voltage VCC3 is output. It can be understood that the plurality of voltage dividing resistors mainly function as a partial pressure. In other embodiments, the voltage dividing resistors may also be implemented by discrete components, and are not limited herein.
  • the number of switching branches corresponds to the number of voltage dividing resistors arranged in series.
  • the switching branches are N+1, and the N+1 switching branches are routed M*2M.
  • the switch tubes form a gate matrix, and based on the control of the latch module 20, when receiving the switch control signal output by the latch module 20, the corresponding switch branch is turned on, and the other switch branches are controlled to be turned off. The state, thereby implementing the gating function, and outputting a third DC voltage VCC3 corresponding to the voltage value.
  • the switch tube may be an N-MOSFET (N-type insulated gate field effect transistor) and/or a P-MOSFET (P-type insulated gate field effect transistor).
  • N-MOSFET N-type insulated gate field effect transistor
  • P-MOSFET P-type insulated gate field effect transistor
  • the latch module 20 includes M latches, as shown in FIG. 2, which are D1, D2, ..., DM-1, DM, respectively.
  • the output ends of the latches are connected in one-to-one correspondence with the controlled ends of the switch tubes in the same row of the gate switch matrix 30.
  • the M latches respectively control the on/off of the same switch tube corresponding to the row direction of the multiplex switch branch, so that there is only one switch under the control of the M latches.
  • the branch is fully turned on and outputs a third DC voltage VCC3 corresponding to the voltage value.
  • each of the latches outputs a corresponding switch control signal to control the switch of the corresponding switch branch to be turned on by using a binary code principle.
  • each latch has two input ends, a first input terminal C and a second input terminal A (A1, A2, ... AM-1, AM), which are respectively used for inputting logic high power.
  • the flat/low level latch signal and the strobe signal when the latch signal input from the first input terminal C is at a logic level H (high level), the output terminal B of the latch (B1, B2, ... The switch control signal output by BM-1, BM) is the strobe signal input by the second input terminal A at this time.
  • the latch signal is at a logic level L (low level)
  • the output terminal B maintains the previous switch control signal.
  • the output state, the strobe signal at this time is invalid, so that the working principle of the binary decoder is used to output the corresponding switch control signal to control the corresponding switch branch to be turned on to output the third DC voltage VCC3 corresponding to the voltage value.
  • the display device further includes a film source chip, ie, S-COF (Source-Chip on Film (not shown), a film grid, that is, a G-COF (Gate-Chip on Film) (not shown), which is connected to the display area 200.
  • a film source chip ie, S-COF (Source-Chip on Film (not shown)
  • a film grid that is, a G-COF (Gate-Chip on Film) (not shown) (not shown) (not shown)
  • G-COF Gate-Chip on Film
  • S-COF is used to TCON on the C-board (Timing Controller, timing controller)
  • the data signal provided by the IC is converted into an analog signal and output to the display area 200, that is, the liquid crystal panel; the G-COF is used to provide an on/off signal to the pixel electrode in the liquid crystal panel to control the liquid crystal panel. jobs.
  • FIG. 3 is a specific circuit when the reference voltage generating circuit is third-order according to an embodiment of the present invention
  • FIG. 4 is a reference voltage generating circuit of FIG. 3, wherein the switch control signal corresponds to the third DC voltage VCC3 output.
  • the truth table In Figure 3, the number of latches is three, D1, D2, and D3, respectively.
  • the number of corresponding voltage dividing resistors is seven, which are resistors R1, R2, R3, R4, R5, R6 and R7, respectively, and the first DC voltage VCC1 and the second DC voltage difference are respectively divided into voltage values of V1. V2, V3, V4, V5, V6, and output.
  • switch branches in the gate switch matrix 30, which are respectively S1, S2, S3, S4, S5, S6, S7 and S8, and the output voltage values are V1, V2, V3, V4, V5, V6, V7 respectively.
  • Tube composition S5 is composed of P-MOS tube, P-MOS tube and N-MOS tube from top to bottom; S5 is composed of P-MOS tube, N-MOS tube and P-MOS tube from top to bottom; S7 From top to bottom, it consists of N-MOS tube, P-MOS tube and P-MOS tube. S7 is composed of P-MOS tube, P-MOS tube and P-MOS tube from top to bottom.
  • the output voltage of the output of the gate switch matrix 30 is V2, and so on, and the latch outputs three switch control signals through the output terminals B1, B2, and B3 to control the conduction of the P-MOSFET/N-MOSFET. Therefore, the corresponding switch branch is controlled to be turned on, and the voltage output of the eight third DC voltage VCC3 corresponding to the voltage value V1 to V8 is controlled to complete the adjustment of the reference voltage.
  • the above display device can be a CRT (Cathode Ray) Tube, cathode ray tube) display device, LCD (Liquid Crystal Display), PDP (Plasma Display) Panel, plasma display device and OLED (Organic Light-Emitting Diode) display device, this application can be selected as LCD (Liquid TFT-LCDTFT-LCD in Crystal Display (Liquid Crystal Display Device) (Thin Film Transistor Liquid Crystal) Display, thin film transistor liquid crystal display device).
  • LCD Liquid TFT-LCDTFT-LCD in Crystal Display
  • LCD Liquid Crystal Display Device
  • Thin Film Transistor Liquid Crystal Thin Film Transistor Liquid Crystal
  • the present application also proposes a reference voltage generating method.
  • the reference voltage generating method includes the following steps:
  • the multi-channel voltage conversion module uses N voltage dividing resistors to divide the difference between the first DC voltage and the second DC voltage into a third DC voltage of the N+1 voltage value and output the same.
  • the control latch module inputs the multi-channel latch signal and the strobe signal, and outputs a corresponding switch control signal according to the input multi-channel latch signal and the strobe signal;
  • the switch control signal outputted by the output end of the latch module is a strobe signal input at this time
  • the latch signal is a second level signal
  • the output is The terminal maintains the previous switch control signal output state, and the strobe signal at this time is invalid.
  • the latch module uses M latches to respectively control the on/off of the corresponding switch tube corresponding to the row direction of the multiplex switch branch.
  • the gate switch matrix when receiving the switch control signal, turns on a corresponding switch branch in the gate switch matrix according to the switch control signal to output the third DC voltage corresponding to the voltage value;
  • the third direct current power source is the reference voltage.
  • the embodiment further provides an electronic device, which includes a circuit board and a display device as described above.
  • the detailed structure of the display device can be referred to the above embodiment, and details are not described herein again. It can be understood that The above-mentioned display device is used in the electronic device of the present invention. Therefore, the embodiment of the electronic device of the present invention includes all the technical solutions of all the embodiments of the display device described above, and the technical effects achieved are also completely the same, and details are not described herein again.
  • the circuit board is connected to the display area of the display device via a fan-out area of the display device.
  • the electronic device may be an electronic device having a display screen, such as a television, a computer, or a mobile phone, and is not limited herein.

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Abstract

一种显示装置及基准电压产生方法，显示装置包括显示区（200）、扇出区（100）及形成于扇出区（100）的基准电压产生电路，其中，基准电压产生电路包括：多路电压转换模块（10），用于输入第一直流电压（VCC1）和第二直流电压（VCC2），并输出多路不同电压值的第三直流电压（VCC3）；锁存器模块（20）,用于输入多路锁存信号和选通信号，并根据输入的多路锁存信号和选通信号输出对应的开关控制信号；选通开关矩阵（30），具有控制多路第三直流电压（VCC3）输出的多个开关支路，用于在接收到开关控制信号时，根据开关控制信号导通对应的开关支路，以输出对应电压值的第三直流电压（VCC3）。

Description

显示装置及基准电压产生方法
技术领域
本申请涉及电子电路技术领域，特别涉及一种显示装置及基准电压产生方法。
背景技术
目前，TFT-LCD（薄膜晶体管液晶显示装置 ）是当前平板显示的应用较为广泛且主要的显示装置之一，显示装置已然成为了现代IT、视讯等电子设备中不可或缺的显示平台。
显示装置是通过电压驱动，在显示工作的过程中需要给面板中的液晶分子偏转时提供一液晶偏转基准电压VCOM。现有技术中，基准电压VCOM可以通过与显示装置面板相连的电路板上的DVR（Digital Voltage Regulator，数字电压调节器）或者机械VR（Voltage Regulator，电压调节器）产生，输出至显示装置面板。但是DVR和机械VR造价高，导致电子设备的整体生产成本高，不利于显示装置的推广使用。
发明内容
本申请的主要目的是提出一种显示装置及基准电压产生方法，其可利用显示装置的自身结构获得可调节的基准电压。
为实现上述目的，本申请提出一种显示装置，所述显示装置包括显示区、扇出区及形成于所述扇出区的基准电压产生电路，所述基准电压产生电路包括：
多路电压转换模块，用于输入第一直流电压和第二直流电压，并输出多路不同电压值的第三直流电压；
锁存器模块，用于输入多路锁存信号和选通信号，并根据输入的多路锁存信号和选通信号输出对应的开关控制信号；
选通开关矩阵，具有控制多路所述第三直流电压输出的多个开关支路，用于在接收到所述开关控制信号时，根据所述开关控制信号导通对应的开关支路，以输出对应电压值的所述第三直流电压。
可选地，所述锁存器模块包括多个第一输入端，所述多路电压转换模块的第一输入端和第二输入端分别用于输入第一直流电压和第二直流电压；
所述开关支路包括输入端、输出端及受控端；
所述锁存器模块包括多个第一输入端、多个第二输入端及多个输出端；
所述多路电压转换模块的第一输入端及第二输入端分别用于输入第一直流电压和第二直流电压，所述多路电压转换模块的多个输出端与多个所述开关支路的输入端一一对应连接；多个所述开关支路的输出端用于输出对应电压值的所述第三直流电压；所述锁存器模块的多个第一输入端用于接入锁存信号，所述锁存器模块的多个第二输入端用于输入选通信号，所述锁存器模块的多个输出端与多路所述开关支路的受控端一一对应连接。
可选地，当所述锁存信号为第一电平信号时，所述锁存器模块的输出端输出的开关控制信号为此时输入的选通信号，当锁存信号为第二电平信号时，输出端维持之前的开关控制信号输出状态，此时的选通信号失效。
可选地，所述多路电压转换模块包括N个分压电阻，各所述分压电阻的阻值相同，且依次串联连接于所述多路电压转换模块的第一输入端及第二输入端之间。
可选地，N个所述分压电阻将所述第一直流电压与所述第二直流电压的差值均分成N+1段电压值的所述第三直流电压后输出。
可选地，所述开关支路的数量为N+1个，且N+1个所述开关支路均具有M个串联设置的开关管，从而组成M行、N+1列的所述选通开关矩阵；其中，N=2M-1。
可选地，所述锁存器模块包括对应M行所述选通开关矩阵设置的M个锁存器，各所述锁存器的输出端与所述选通开关矩阵位于同一行的所述开关管的受控端一一对应连接。
可选地，各所述锁存器利用二进制码原理，输出相应的所述开关控制信号以控制对应的所述开关支路中的所述开关管导通。
可选地，所述显示装置还包括S-COF（Source-Chip on Film）：源极覆晶薄膜芯片、G-COF（Gate-Chip on Film）：栅极覆晶薄膜芯片；所述S-COF、所述G-COF与所述显示区连接。
本申请还提出一种基准电压产生方法，包括以下步骤：
控制多路电压转换模块输入第一直流电压和第二直流电压，并将输入的第一直流电压和第二直流电压进行转换后，输出多路不同电压值的第三直流电压；
控制锁存器模块输入多路锁存信号和选通信号，并根据输入的多路锁存信号和选通信号输出对应的开关控制信号；
选通开关矩阵在接收到所述开关控制信号时，根据所述开关控制信号导通选通开关矩阵中对应的开关支路，以输出对应电压值的所述第三直流电压；所述第三直流电源为所述基准电压。
可选地，当所述锁存信号为第一电平信号时，锁存器模块的输出端输出的开关控制信号为此时输入的选通信号，当锁存信号为第二电平信号时，输出端维持之前的开关控制信号输出状态，此时的选通信号失效。
可选地，所述多路电压转换模块采用N个分压电阻将第一直流电压与第二直流电压的差值均分成N+1段电压值的第三直流电压后输出。
可选地，所述开关支路采用为N+1个来实现，且N+1个所述开关支路均具有M个串联设置的开关管，从而组成M行、N+1列的所述选通开关矩阵；其中，N=2M-1。
可选地，所述锁存器模块采用M个锁存器分别对应控制多路开关支路对应行向位置相同的开关管导通/关断。
本申请还提出一种显示装置，所述显示装置包括显示区、扇出区及形成于所述扇出区的基准电压产生电路，其中，所述基准电压产生电路包括：
多路电压转换模块，用于输入第一直流电压和第二直流电压，并输出多路不同电压值的第三直流电压；
锁存器模块，用于输入多路锁存信号和选通信号，并根据输入的多路锁存信号和选通信号输出对应的开关控制信号；
选通开关矩阵，具有控制多路所述第三直流电压输出的多个开关支路，用于在接收到所述开关控制信号时，根据所述开关控制信号导通对应的开关支路，以输出对应电压值的所述第三直流电压；
多路电压转换模块包括N个分压电阻，N个所述分压电阻为所述扇出区上利用同一制程形成的阻值相同的电阻。
本申请还提出一种电子设备，包括电路板及如上所述显示装置，所述电路板经所述显示装置的扇出区与所述显示区连接；其中，所述显示装置包括显示区、扇出区及形成于所述扇出区的基准电压产生电路，所述基准电压产生电路包括：多路电压转换模块，用于输入第一直流电压和第二直流电压，并输出多路不同电压值的第三直流电压；锁存器模块，用于输入多路锁存信号和选通信号，并根据输入的多路锁存信号和选通信号输出对应的开关控制信号；选通开关矩阵，具有控制多路所述第三直流电压输出的多个开关支路，用于在接收到所述开关控制信号时，根据所述开关控制信号导通对应的开关支路，以输出对应电压值的所述第三直流电压。
本申请通过设置多路电压转换模块，以将第一直流电压与第二直流电压的差值均分成多路不同的电压值后输出，从而形成对应的第三直流电压，并通过设置锁存器模块，输入多路锁存信号和选通信号，并根据输入的多路锁存信号和选通信号输出对应的开关控制信号，以控制选通开关矩阵根据所述开关控制信号导通对应的开关支路，从而输出对应电压值的所述第三直流电压。此时工作人员仅需检验当前液晶面板的显示状态，并根据液晶面板的闪烁程度对开关支路输出的第三直流电压进行调节，当闪烁程度最低时，即面板表现最佳。
本申请的显示装置利用扇出区的多路电压转换模块、锁存器模块及选通开关模块等结构形成基准电压产生电路，该电路结构简单、易于实现，从而降低了电子设备的整体生产成本高。且基准电压产生电路无需采用DVR和机械VR即可产生的基准电压可调节，液晶面板的显示效果较优。此外由于基准电压产生于显示装置，故无需考虑C-board与液晶面板装配不对应的问题，方便后期的运输及安装。
附图说明
为了更清楚地说明本申请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的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本申请显示装置一实施例的功能模块示意图；
图2为图1显示装置中基准电压产生电路的电路结构示意图；
图3为图2基准电压产生电路一实施例的具体电路结构示意图；
图4为图3基准电压产生电路中，开关控制信号对应第三直流电压输出的真值表；
图5为本申请基准电压产生方法一实施例的流程图。
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本申请实施例中的附图，对本申请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申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明，若本申请实施例中有涉及方向性指示（诸如上、下、左、右、前、后……），则该方向性指示仅用于解释在某一特定姿态（如附图所示）下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本申请实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其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至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本申请要求的保护范围之内。
本申请提出一种显示装置，适用于电脑、电视以及手机等视讯电子设备中。
参照图1，在本申请一实施例中，所述显示装置包括扇出区100、显示区200及形成于所述扇出区100的基准电压产生电路（图未标示）。
电子设备上的系统主板将R/G/B压缩信号、控制信号及电源电压通过导线与C-Board（控制板）的连接器相连接，R/G/B压缩信号、控制信号及电源电压等数据经过C-board上的TCON （时序控制器）IC处理后，经FFC(柔性扁平电缆)传输至电路板，电路板通过扇出区100上的S-COF（Source-Chip on Film）：源极覆晶薄膜芯片、G-COF（Gate-Chip on Film）：栅极覆晶薄膜芯片与显示区200连接，从而使得显示区200获得所需的工作电源电压，并根据控制信号工作。
可以理解的是，显示装置显示区200是经电压来驱动工作的，显示过程中需要一基准电压VCOM。由于制程的不稳定性，每一显示装置的显示区200也即液晶面板的最佳基准电压都不相同，需要根据液晶面板的实际特性进行调节。一般地，基准电压大多通过电路板或者C-Board上的DVR（Digital Voltage Regulator，数字电压调节器）或者机械VR（Voltage Regulator，电压调节器）产生，进而输出至液晶面板，以驱动液晶面板工作。但是DVR和机械VR造价高，导致电子设备的整体生产成本高，不利于显示装置的推广使用，此外当基准电压由C-Board产生时，由于在出厂时为了方便运输，将C-board和液晶面板是分别包装出货，将会出现用户所选的液晶面板与C-Board不对应，从而出现液晶面板对应到C-board中的基准电压非最佳值，进而导致画面闪烁，显示效果不佳。本实施例，针对这一情况，提出一种形成于显示装置扇出区100的基准电压产生电路，该基准电压产生电路形成于扇出区100，且产生的基准电压可调节。
本实施例中，该基准电压产生电路包括多路电压转换模块10、锁存器模块20及选通开关矩阵30。
具体地，所述多路电压转换模块10的第一输入端及第二输入端分别用于输入第一直流电压VCC1和第二直流电压VCC2，所述多路电压转换模块10的多个输出端与多个所述开关支路的输入端一一对应连接；多个所述开关支路的输出端用于输出对应电压值的所述第三直流电压VCC3；所述锁存器模块20的多个第一输入端用于输入锁存信号，所述锁存器模块20的多个第二输入端用于输入选通信号，所述锁存器模块20的多个输出端与多路所述开关支路的受控端一一对应连接。
其中，多路电压转换模块10，用于输入第一直流电压VCC1和第二直流电压，并输出多路不同电压值的第三直流电压VCC3；第一直流电压VCC1与第二直流电压经电路板输入，且分别为基准电压调节上下限，多路电压转换模块10将第一直流电压VCC1与第二直流电压的差值均分成多路不同的电压值后输出，以形成对应的第三直流电压VCC3。
锁存器模块20，用于输入多路锁存信号和选通信号，并根据输入的多路锁存信号和选通信号输出对应的开关控制信号；当锁存信号为逻辑电平H（高电平）时，锁存器模块20的输出端B输出的开关控制信号为此时输入的选通信号，当锁存信号为逻辑电平L（低电平）时，输出端维持之前的开关控制信号输出状态，此时的选通信号失效。
选通开关矩阵30，具有控制多路所述第三直流电压VCC3输出的多个开关支路，用于在接收到所述开关控制信号时，根据所述开关控制信号导通对应的开关支路，以输出对应电压值的所述第三直流电压VCC3。当对应的开关支路导通时，该开关支路输出此时多路电压转换模块10对应电压值的第三直流电压VCC3。
本申请通过设置多路电压转换模块10，以将第一直流电压VCC1与第二直流电压的差值均分成多路不同的电压值后输出，从而形成对应的第三直流电压VCC3，并通过设置锁存器模块20，输入多路锁存信号和选通信号，并根据输入的多路锁存信号和选通信号输出对应的开关控制信号，以控制选通开关矩阵30根据所述开关控制信号导通对应的开关支路，从而输出对应电压值的所述第三直流电压VCC3。此时工作人员仅需检验当前液晶面板的显示状态，并根据液晶面板的闪烁程度对开关支路输出的第三直流电压VCC3进行调节，当闪烁程度最低时，即面板表现最佳。当此时液晶面板显示最佳时，锁存器模块20模块锁定此时选通信号，从而控制对应的开关支路导通，并固定此时对应电压值的第三直流电压VCC3，此时的对应电压值的第三直流电压VCC3也就是该液晶面板的最佳基准电压，即VCOM。本申请的显示装置利用扇出区100的多路电压转换模块10、锁存器模块20及选通开关模块等结构形成基准电压产生电路，该电路结构简单、易于实现，从而降低了电子设备的整体生产成本高。且基准电压产生电路无需采用DVR和机械VR即可产生的基准电压可调节，液晶面板的显示效果较优。此外由于基准电压产生于显示装置，故无需考虑C-board与液晶面板装配不对应的问题，方便后期的运输及安装。
参照图2，在一可选实施例中，所述多路电压转换模块10包括N个分压电阻，如图2，分别为R1、R2、… RN-1、RN。各所述分压电阻R1、R2、… RN-1、RN的阻值相同，且依次串联连接于所述多路电压转换模块10的第一输入端及第二输入端之间。
本实施例中，多个分压电阻为扇出区100上利用同一制程形成的阻值相同的电阻，由于分压电阻与显示装置其他模块共用同一制程，不会增加额外成本且易于实现。N个阻值相同的分压电阻依次串联连接于第一输入端及第二输入端之间，并将第一直流电压VCC1与第二直流电压的差值均分成N+1段电压值的第三直流电压VCC3后输出。可以理解的是，多个分压电阻主要起分压作用，在其他实施例中，分压电阻也可以是由分立元件来实施，在此不做限制。
参照图2，进一步地，上述实施例中，所述开关支路的数量为N+1个，且N+1个所述开关支路均具有M个串联设置的开关管，从而组成M行、N+1列的所述选通开关矩阵30；其中，N=2M-1。
本实施例中，开关支路的数量与串联设置的分压电阻的数量对应，例如当分压电阻为N个时，开关支路就为N+1路，N+1路开关支路由M*2M个开关管组成选通矩阵，并基于锁存器模块20的控制，当接收到锁存器模块20输出的开关控制信号时，导通对应的开关支路，并控制其他开关支路处于关断状态，从而实现选通功能，并输出对应电压值的第三直流电压VCC3。
本实施例中开关管可选为N-MOSFET（N型绝缘栅场效应管）和/或P-MOSFET（P型绝缘栅场效应管）。
参照图2，进一步地，上述实时例中，所述锁存器模块20包括M个锁存器，如图2，分别为D1、D2、…DM-1、DM。各所述锁存器的输出端与所述选通开关矩阵30位于同一行的所述开关管的受控端一一对应连接。
本实施例中，M个锁存器分别对应控制多路开关支路对应行向位置相同的开关管导通/关断，以使实现在M个锁存器的控制下有且仅有一路开关支路完全导通，并输出对应电压值的第三直流电压VCC3。
参照图2，进一步地，上述实施例中，各所述锁存器利用二进制码原理，输出相应的所述开关控制信号以控制对应的所述开关支路中的所述开关管导通。
本实施例中，如图2，各锁存器均有第一输入端C及第二输入端A（A1、A2、…AM-1、AM）两个输入端，分别用来输入逻辑高电平/低电平的锁存信号和选通信号，当第一输入端C输入的锁存信号为逻辑电平H（高电平）时，锁存器的输出端B(B1、B2、…BM-1、BM)输出的开关控制信号为此时第二输入端A输入的选通信号，当锁存信号为逻辑电平L（低电平）时，输出端B维持之前的开关控制信号输出状态，此时的选通信号失效，这样利用二进制译码器的工作原理来输出对应的开关控制信号，以控制对应的开关支路导通，以输出对应电压值的第三直流电压VCC3。
参照图1，基于上述实施例，所述显示装置还进一步包括膜源芯片即S-COF（Source-Chip on Film）（图未示出）、薄膜栅片，即G-COF（Gate-Chip on Film）（图未示出），所述S-COF与所述显示区200连接。
本实施例中，S-COF用于将C-board上TCON （Timing Controller，时序控制器）IC所提供的数据信号转化成模拟信号，并输出给显示区200也即液晶面板；G-COF用于给液晶面板中的画素电极提供开启/关闭信号，以控制液晶面板工作。
为了更好地说明本申请的思想，以下结合图3及图4对本申请基准电压产生电路的具体原理进行阐述：
如附图3及图4，图3为本申请一实施例基准电压产生电路为三阶时的具体电路，图4为图3的基准电压产生电路中，开关控制信号对应第三直流电压VCC3输出的真值表。图3中，锁存器的数量为3个分别为D1、D2及D3。对应分压电阻的数量为7个，分别为电阻R1、R2、R3、R4、R5、R6及R7，且将第一直流电压VCC1与第二直流电压差值均分成分别为电压值为V1、V2、V3、V4、V5、V6、并输出。选通开关矩阵30中开关支路为8条，分别为S1、S2、S3、S4、S5、S6、S7及S8，且分别输出电压值为V1、V2、V3、V4、V5、V6、V7及V8的第三直流电压VCC3，其中，S1由上至下依次由N-MOS管、N-MOS管及N-MOS管组成；S2由上至下依次由P-MOS管、N-MOS管及N-MOS管组成；S3由上至下依次由N-MOS管、P-MOS管及N-MOS管组成；S4由上至下依次由N-MOS管、N-MOS管及P-MOS管组成；S5由上至下依次由P-MOS管、P-MOS管及N-MOS管组成；S5由上至下依次由P-MOS管、N-MOS管及P-MOS管组成；S7由上至下依次由N-MOS管、P-MOS管及P-MOS管组成；S7由上至下依次由P-MOS管、P-MOS管及P-MOS管组成。当锁存器D1、D2及D3的第一输入端C输入的锁存信号为逻辑电平H（高电平）时，此时输出端B1、B2及B3输出开关控制信号为第二输入端A1、A2及A3的输入的选通信号，也即A1=B1，A2=B2，A3=B3，此时调节第二输入端A1~A3的输入，若此时VCOM的电压值为V2，液晶显示屏闪烁程度最低，即面板表现最佳，此时第一输入端C切换为逻辑电平L（低电平），B1~B3维持逻辑电平L、H、H，开关支路S2导通，选通开关矩阵30的输出端输出的电压即为V2，以此类推，锁存器通过输出端B1、B2、B3输出三个开关控制信号，来控制P-MOSFET/N-MOSFET导通，从而控制对应开关支路导通，并控制对应的电压值为V1~V8的8路第三直流电压VCC3电压输出，完成基准电压的调节。
可以理解的是，上述显示装置可以为CRT（Cathode Ray Tube，阴极射线管）显示装置、LCD（Liquid Crystal Display，液晶显示装置）、PDP（Plasma Display Panel，等离子）显示装置以及OLED（Organic Light-Emitting Diode，有机发光二极管）显示装置，本申请可选为LCD（Liquid Crystal Display，液晶显示装置）中的TFT-LCDTFT-LCD（Thin Film Transistor Liquid Crystal Display，薄膜晶体管液晶显示装置）。
本申请还提出一种基准电压产生方法。
参照图5，该基准电压产生方法包括以下步骤：
S1、控制多路电压转换模块输入第一直流电压和第二直流电压，并将输入的第一直流电压和第二直流电压进行转换后，输出多路不同电压值的第三直流电压；
其中，所述多路电压转换模块采用N个分压电阻将第一直流电压与第二直流电压的差值均分成N+1段电压值的第三直流电压后输出。
S2、控制锁存器模块输入多路锁存信号和选通信号，并根据输入的多路锁存信号和选通信号输出对应的开关控制信号；
其中，当所述锁存信号为第一电平信号时，锁存器模块的输出端输出的开关控制信号为此时输入的选通信号，当锁存信号为第二电平信号时，输出端维持之前的开关控制信号输出状态，此时的选通信号失效。
并且，所述锁存器模块采用M个锁存器分别对应控制多路开关支路对应行向位置相同的开关管导通/关断。
S3、选通开关矩阵在接收到所述开关控制信号时，根据所述开关控制信号导通选通开关矩阵中对应的开关支路，以输出对应电压值的所述第三直流电压；所述第三直流电源为所述基准电压。
其中，所述开关支路采用为N+1个来实现，且N+1个所述开关支路均具有M个串联设置的开关管，从而组成M行、N+1列的所述选通开关矩阵；其中，N=2M-1。
本实施例还提出一种电子设备，该电子设备包括电路板及如上所述的显示装置，所述显示装置的详细结构可参照上述实施例，此处不再赘述；可以理解的是，由于在本实用新型电子设备中使用了上述显示装置，因此，本实用新型电子设备的实施例包括上述显示装置全部实施例的全部技术方案，且所达到的技术效果也完全相同，在此不再赘述。其中，所述电路板经所述显示装置的扇出区与所述显示装置的显示区连接。
在本实施例中，所述电子设备可为电视机、电脑、手机等具有显示屏的电子设备，在此不作限制。
以上所述仅为本申请的优选实施例，并非因此限制本申请的专利范围，凡是在本申请的申请构思下，利用本申请说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本申请的专利保护范围内。

Claims (15)

  1. 一种显示装置，所述显示装置包括显示区、扇出区及形成于所述扇出区的基准电压产生电路，其中，所述基准电压产生电路包括：
    多路电压转换模块，用于输入第一直流电压和第二直流电压，并输出多路不同电压值的第三直流电压；
    锁存器模块，用于输入多路锁存信号和选通信号，并根据输入的多路锁存信号和选通信号输出对应的开关控制信号；
    选通开关矩阵，具有控制多路所述第三直流电压输出的多个开关支路，用于在接收到所述开关控制信号时，根据所述开关控制信号导通对应的开关支路，以输出对应电压值的所述第三直流电压。
  2. 如权利要求1所述的显示装置，其中，所述多路电压转换模块包括：第一输入端、第二输入端及多个输出端；
    所述锁存器模块包括多个第一输入端，所述多路电压转换模块的第一输入端和第二输入端分别用于输入第一直流电压和第二直流电压；
    所述开关支路包括输入端、输出端及受控端；
    所述锁存器模块包括多个第一输入端、多个第二输入端及多个输出端；
    所述多路电压转换模块的多个输出端与多个所述开关支路的输入端一一对应连接；多个所述开关支路的输出端用于输出对应电压值的所述第三直流电压；所述锁存器模块的多个第一输入端用于接入锁存信号，所述锁存器模块的多个第二输入端用于输入选通信号，所述锁存器模块的多个输出端与多路所述开关支路的受控端一一对应连接。
  3. 如权利要求1所述的显示装置，其中，当所述锁存信号为第一电平信号时，所述锁存器模块的输出端输出的开关控制信号为此时输入的选通信号，当锁存信号为第二电平信号时，输出端维持之前的开关控制信号输出状态，此时的选通信号失效。
  4. 如权利要求1所述的显示装置，其中，所述多路电压转换模块包括N个分压电阻，各所述分压电阻的阻值相同，且依次串联连接于所述多路电压转换模块的第一输入端及第二输入端之间。
  5. 如权利要求4所述的显示装置，其中，N个所述分压电阻将所述第一直流电压与所述第二直流电压的差值均分成N+1段电压值的所述第三直流电压后输出。
  6. 如权利要求4所述的显示装置，其中，所述开关支路的数量为N+1个，且N+1个所述开关支路均具有M个串联设置的开关管，从而组成M行、N+1列的所述选通开关矩阵；其中，N=2M-1。
  7. 如权利要求6所述的显示装置，其中，所述锁存器模块包括对应M行所述选通开关矩阵设置的M个锁存器，各所述锁存器的输出端与所述选通开关矩阵位于同一行的所述开关管的受控端一一对应连接。
  8. 如权利要求7所述的显示装置，其中，各所述锁存器利用二进制码原理，输出相应的所述开关控制信号以控制对应的所述开关支路中的所述开关管导通。
  9. 如权利要求1所述的显示装置，其中，所述显示装置还包括S-COF（Source-Chip on Film）：源极覆晶薄膜芯片、G-COF（Gate-Chip on Film）：栅极覆晶薄膜芯片；所述S-COF、所述G-COF与所述显示区连接。
  10. 一种基准电压产生方法，包括以下步骤：
    控制多路电压转换模块输入第一直流电压和第二直流电压，并将输入的第一直流电压和第二直流电压进行转换后，输出多路不同电压值的第三直流电压；
    控制锁存器模块输入多路锁存信号和选通信号，并根据输入的多路锁存信号和选通信号输出对应的开关控制信号；
    选通开关矩阵在接收到所述开关控制信号时，根据所述开关控制信号导通选通开关矩阵中对应的开关支路，以输出对应电压值的所述第三直流电压；所述第三直流电源为所述基准电压。
  11. 如权利要求10所述的基准电压产生方法，其中，当所述锁存信号为第一电平信号时，锁存器模块的输出端输出的开关控制信号为此时输入的选通信号，当锁存信号为第二电平信号时，输出端维持之前的开关控制信号输出状态，此时的选通信号失效。
  12. 如权利要求10所述的基准电压产生方法，其中，所述多路电压转换模块采用N个分压电阻将第一直流电压与第二直流电压的差值均分成N+1段电压值的第三直流电压后输出。
  13. 如权利要求10所述的基准电压产生方法，其中，所述开关支路采用为N+1个来实现，且N+1个所述开关支路均具有M个串联设置的开关管，从而组成M行、N+1列的所述选通开关矩阵；其中，N=2M-1。
  14. 如权利要求10所述的基准电压产生方法，其中，所述锁存器模块采用M个锁存器分别对应控制多路开关支路对应行向位置相同的开关管导通/关断。
  15. 一种显示装置，所述显示装置包括显示区、扇出区及形成于所述扇出区的基准电压产生电路，其中，所述基准电压产生电路包括：
    多路电压转换模块，用于输入第一直流电压和第二直流电压，并输出多路不同电压值的第三直流电压；
    锁存器模块，用于输入多路锁存信号和选通信号，并根据输入的多路锁存信号和选通信号输出对应的开关控制信号；
    选通开关矩阵，具有控制多路所述第三直流电压输出的多个开关支路，用于在接收到所述开关控制信号时，根据所述开关控制信号导通对应的开关支路，以输出对应电压值的所述第三直流电压；
    多路电压转换模块包括N个分压电阻，N个所述分压电阻为所述扇出区上利用同一制程形成的阻值相同的电阻。
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