CN206421807U - The common electric voltage adjusting means and display device of display panel - Google Patents
The common electric voltage adjusting means and display device of display panel Download PDFInfo
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- CN206421807U CN206421807U CN201720008042.9U CN201720008042U CN206421807U CN 206421807 U CN206421807 U CN 206421807U CN 201720008042 U CN201720008042 U CN 201720008042U CN 206421807 U CN206421807 U CN 206421807U
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Abstract
The utility model discloses a kind of common electric voltage adjusting means of display panel, including：Time schedule controller, for providing display data and control data to display panel；Common voltage generation circuit, display panel is supplied to for generating initial common electric voltage according to control data；Detection module, the flash signal for obtaining display panel；Signal processing module, for generating offset data according to flash signal；Wherein, the time schedule controller is additionally operable to according to control data and offset data generation driving data；The common voltage generation circuit is additionally operable to be supplied to display panel according to driving data generation common electric voltage.The utility model embodiment additionally provides a kind of display device, time schedule controller is fed back to by obtaining the flash signal of display panel and handling generation offset data, the common voltage generation circuit that time schedule controller control is located on source electrode driver produces common electric voltage, the element and wiring space saved on pcb board, realize the adjust automatically of common electric voltage.
Description
Technical field
The utility model belongs to display apparatus test field, is adjusted more particularly, to a kind of common electric voltage of display panel
Device and display device.
Background technology
TFT (Thin Film Transistor)-TFT, refers to each liquid on liquid crystal display
Brilliant pixel is driven by integrated thin film transistor (TFT) behind, so as to accomplish high speed high brightness high-contrast
Display screen information, common TFT-LCD (Thin Film Transistor-LCD) is one kind of most liquid crystal displays.It refer to
Fig. 1, is the equivalent circuit of full wafer TFT panel, and each of which TFT is in parallel with Cs (storage capacitance) institutes with Clc (liquid crystal capacitance),
Represent the point A of a display.And a basic pixel cell (Pixel), then three point so shown A are needed, respectively generation
Table RGB (Red, Green, Blue) three primary colors.When panel works, scanner driver can export waveform as depicted, sequentially
It will be opened per a line TFT, and allow the data driver of entire row that the display point of a full line is charged into each required voltage simultaneously well,
The different GTG of display.When this line is charged, scanner driver just closes voltage, then the scanner driver of next line
Just voltage is opened, then discharge and recharge is carried out to the display point of next line by the row's data driver of identical one.So sequentially go down,
When the display point of last column of having substituted the bad for the good, just later started to charge up again from the first row again.
Because liquid crystal one's share of expenses for a joint undertaking also has a kind of characteristic, it is constant to be exactly permanently affixed to some voltage, not so the time
Long, even if voltage is cancelled, liquid crystal molecule can not be rotated because of the change of electric field as the destruction of characteristic again, with
Form different GTGs.So at regular intervals, just voltage must be restored to the original state, with avoid the characteristic of liquid crystal molecule by
Destruction.If but showed the situation of same GTG always in view of picture, the display voltage of liquid crystal display would be divided into two kinds
Polarity, when the voltage of show electrode is higher than the electrode voltage of power pole, referred to as positive polarity.And when the voltage of show electrode is low
When the electrode voltage of power pole, just referred to as negative polarity.Either positive polarity voltage or reverse voltage, can all there is one group
The GTG of same brightness.So when the pressure difference absolute value of layer glass is fixed above and below, the GTG showed is a mould
The same.But under both of these case, the steering of liquid crystal molecule is complete on the contrary, also can just avoid when liquid crystal molecule is turned to
When being permanently affixed to a direction, caused characteristic destruction.That is, when display picture is motionless always, we are still
It can ceaselessly replace by positive-negative polarity, reach that display picture is motionless, while the result that liquid crystal molecule is not destroyed.
If public electrode voltages Vcom (Common Voltage) is abnormal, when you see the picture of liquid crystal display, just
It may feel that picture has the sensation of flicker.It is not deliberately to allow display picture one bright one to go out to imitate to make the vision of flicker
Really, but because the picture GTG of display has trickle variation when updating picture every time, human eye is allowed to experience picture in sudden strain of a muscle
It is bright.Fig. 2 is refer to, the same gray scale voltage of positive-negative polarity will have difference, the i.e. picture for same GTG, its positive polarity pair
Vcom absolute pressure difference and its negative polarity is unequal to Vcom absolute pressure difference, so the GTG of its reflection is felt also just to differ
Sample.In the case where not stopping image switching, because positive-negative polarity picture is alternately present, it just may feel that picture is constantly flashing.
Fig. 3 a show the fundamental diagram of the common electric voltage adjusting means of display panel in the prior art.Such as Fig. 3 a institutes
Show, common electric voltage adjusting means includes AVDD voltage, adjustable resistor VR, first resistor R1 and second resistance R2 and amplifier
OP, wherein, first resistor R1, adjustable resistance VR and second resistance R2 are connected in series between AVDD voltage and earth terminal, adjustable
Resistance VR adjustable side is connected with amplifier OP, for outputting common voltage Vcom.The common electric voltage adjusting means firstly the need of
One specific picture for being used to adjust Vcom voltage, then by judging the flicker level of the picture, adjusts adjustable rheostat
Resistance untill the specific picture does not flash.The shortcoming of the common electric voltage adjusting means is：Due to adjustable resistor VR choosings
After fixed, adjustable resistance is certain, then adjustable Vcom voltage scope is narrower；Judging the foundation whether Vcom voltage is adjusted in place is
Its specific picture does not flash, and it judges to carry factor and individual subjective factor, it is possible that because the individual difference of personnel causes Vcom electricity
Pressure is not adjusted optimally；Adjustable rheostat is mechanical knob, and LCD may cause Vcom voltage inclined in transportation
Move.
Fig. 3 b show the fundamental diagram of the common electric voltage adjusting means of another display panel in the prior art.Such as Fig. 3 b
Shown, common electric voltage adjusting means is a power supply chip (Power IC) or digital common electric voltage integrated circuit (Digital
Vcom IC), including programmable common electric voltage amplifier (programmable Vcom OP) and the memory for storing coded data
EEPROM.The common electric voltage adjusting means is by changing the coded data in memory and then adjusting the common electric voltage exported
Vcom.The shortcoming of the common electric voltage adjusting means is：When the parameter of display panel changes, then burning/recording chip again is needed
Coded data adjusts Vcom, and process is cumbersome.
Utility model content
The purpose of this utility model is the common electric voltage adjusting means and display device for providing a kind of display panel.
According to one side of the present utility model there is provided a kind of common electric voltage adjusting means of display panel, including：Sequential control
Device processed, for providing display data and control data to display panel；Common voltage generation circuit, for according to the control number
The display panel is supplied to according to initial common electric voltage is generated；Detection module, the flash signal for obtaining display panel；Signal
Processing module, for generating offset data according to the flash signal；Wherein, the time schedule controller is additionally operable to according to the control
Data and offset data processed generate driving data；The common voltage generation circuit is additionally operable to be generated according to the driving data
Common electric voltage is supplied to the display panel.
Preferably, the common voltage generation circuit is arranged on the source electrode driver of display panel.
Preferably, the display panel includes viewing area and non-display area, wherein, the viewing area includes multiple viewing areas
Domain, each viewing area is correspondingly arranged one source driver.
Preferably, the common voltage generation circuit is separately positioned on the corresponding source electrode driver in multiple viewing areas.
Preferably, the common electric voltage adjusting means also includes：Amplifier, be connected to the common voltage generation circuit and
Between the display panel, the common electric voltage for amplifying the common voltage generation circuit output.
Preferably, the detection module is camera.
Adjusted according to another aspect of the present utility model there is provided a kind of display device, including display panel and common electric voltage
Regulating device, the common electric voltage adjusting means includes：Time schedule controller, for providing display data and control number to display panel
According to；Common voltage generation circuit, the display panel is supplied to for generating initial common electric voltage according to the control data；Inspection
Survey module, the flash signal for obtaining display panel；Signal processing module, for according to flash signal generation compensation number
According to；Wherein, the time schedule controller is additionally operable to according to the control data and offset data generation driving data；It is described public
Voltage generation circuit is additionally operable to be supplied to the display panel according to driving data generation common electric voltage.
Preferably, the common voltage generation circuit is arranged on the source electrode driver of display panel.
Preferably, the display panel includes viewing area and non-display area, wherein, viewing area includes multiple viewing areas,
Each viewing area is correspondingly arranged one source driver.
Preferably, the common electric voltage adjusting means also includes：Amplifier, be connected to the common voltage generation circuit and
Between the display panel, the common electric voltage for amplifying the common voltage generation circuit output.
The common electric voltage adjusting means and display device for the display panel that the utility model embodiment is provided, it is aobvious by obtaining
Show the flash signal of panel and handle generation offset data and feed back to time schedule controller, time schedule controller control is located at source drive
Common voltage generation circuit on device produces common electric voltage, saves element and wiring sky on PCB (printed circuit board (PCB)) plate
Between, realize the adjust automatically of common electric voltage.
Brief description of the drawings
By description referring to the drawings to the utility model embodiment, of the present utility model above-mentioned and other mesh
, feature and advantage will be apparent from, in the accompanying drawings：
Fig. 1 shows the equivalent circuit diagram of full wafer TFT panel in the prior art；
Fig. 2 shows the effect schematic diagram of public electrode voltages Vcom in the prior art；
Fig. 3 a show the structural representation of the common electric voltage adjusting means of a display panel in the prior art；
Fig. 3 b show the structural representation of the common electric voltage adjusting means of another display panel in the prior art；
Fig. 4 shows that the structure of the common electric voltage adjusting means of the display panel provided according to the utility model embodiment is shown
It is intended to；
Fig. 5 shows the knot of the common electric voltage adjusting means of the display panel provided according to another embodiment of the utility model
Structure schematic diagram.
Embodiment
Various embodiments of the present utility model are more fully described hereinafter with reference to accompanying drawing.In various figures, identical
Element is represented using same or similar reference.For the sake of clarity, the various pieces in accompanying drawing are not drawn to paint
System.
The utility model can be presented in a variety of manners, some of examples explained below.
Fig. 4 shows that the structure of the common electric voltage adjusting means of the display panel provided according to the utility model embodiment is shown
It is intended to.As shown in figure 4, the common electric voltage adjusting means is applied to display panel 1, including time schedule controller 21, common electric voltage
Generative circuit 22, detection module 23 and signal processing module 24.
In the present embodiment, time schedule controller 21 is arranged on printed substrate (PCB), and common voltage generation circuit 22 is set
Put on source electrode driver (Source IC), display panel 1 includes viewing area 10 and non-display area 11, wherein, the He of viewing area 10
Printed circuit board (PCB) (PCB) is connected by source electrode driver (Source IC)；Detection module 23 and signal processing module 24 are arranged on
The outside of display device.Source electrode driver (Source IC) can set (Bonding) on FPC, can also set
Put (Bonding) on a display panel.
Wherein, time schedule controller 21 is used to provide display data and control data to display panel.
Common voltage generation circuit 22 is used to be supplied to the display according to the initial common electric voltage of control data generation
Panel.
Detection module 23 is used for the flash signal for obtaining display panel.
In the present embodiment, detection module 23 includes camera or other camera arrangements, obtains the flicker of display panel
Signal is simultaneously sent to signal processing module.
Signal processing module 24 is used to generate offset data according to the flash signal.
In the present embodiment, the signal processing module 24 is measurement jig or computer etc..
Wherein, time schedule controller 21 is additionally operable to according to the control data and offset data generation driving data.It is public
Voltage generation circuit 22 is additionally operable to be supplied to the display panel according to driving data generation common electric voltage.
Specifically, time schedule controller 21 is sent control data to source electrode driver (Source IC) by P2P signals
Common voltage generation circuit 22, common voltage generation circuit 22 generates initial common electric voltage Vcom according to the control data and provides
To the public electrode of display panel 1 to drive display panel, the sudden strain of a muscle of display panel is then obtained by outside detection module 23
Bright signal, and time schedule controller 21, time schedule controller are fed back to by the progress processing generation offset data of signal processing module 24
21 generate new driving data to common voltage generation circuit 22, common electric voltage generation electricity according to control data and offset data
Road 22 generates new common electric voltage and is supplied to the display panel 1.The utility model is fed back by the flash signal of display panel
To time schedule controller, and then adjust Vcom voltage.
In a preferred embodiment, described device is also arranged on printed substrate (PCB) including amplifier 25, is used
The public electrode of display panel 1 is supplied to after the common electric voltage for exporting common voltage generation circuit 22 is amplified.
The common electric voltage adjusting means for the display panel that the utility model embodiment is provided, by the sudden strain of a muscle for obtaining display panel
Sparkle signal and handle generation offset data and feed back to time schedule controller, time schedule controller control is located at public on source electrode driver
Voltage generation circuit produces common electric voltage, saves the element and wiring space in PCBA board, realizes common electric voltage oneself
Dynamic adjustment.
Fig. 5 shows the knot of the common electric voltage adjusting means of the display panel provided according to another embodiment of the utility model
Structure schematic diagram.As shown in figure 5, the common electric voltage adjusting means is applied to display panel 1, including it is time schedule controller 21, public
Voltage generation circuit 22, detection module 23 and signal processing module 24.
In this example it is shown that panel 1 includes viewing area 10 and non-display area 11, wherein, viewing area 10 includes multiple
Viewing area, each viewing area correspondence one common voltage generation circuit 22, the number of common voltage generation circuit 22 with
The viewing area number that display panel 1 is divided is identical.
In the present embodiment, time schedule controller 21 is arranged on printed substrate (PCB), a common voltage generation circuit
22 are correspondingly arranged on a source electrode driver (Source IC), and display panel 1 includes viewing area 10 and non-display area 11, its
In, viewing area 10 and printed circuit board (PCB) 2 pass through multiple source electrode driver Source IC connections；Detection module 23 and signal transacting
Module 24 is arranged on the outside of display device.Source electrode driver Source IC, which are set, can set (Bonding) in flexible circuitry
On plate, (Bonding) can also be set on a display panel.
Wherein, time schedule controller 21 is used to provide display data and control data to display panel.
Common voltage generation circuit 22 is used to be supplied to the display according to the initial common electric voltage of control data generation
Panel.
Detection module 23 is used for the flash signal for obtaining display panel.
In the present embodiment, detection module 23 includes camera or other camera arrangements, obtains the flicker of display panel
Signal is simultaneously sent to signal processing module.
Signal processing module 24 is used to generate offset data according to the flash signal.
In the present embodiment, the signal processing module 24 is measurement jig or computer etc..
Wherein, time schedule controller 21 is additionally operable to according to the control data and offset data generation driving data.It is public
Voltage generation circuit 22 is additionally operable to be supplied to the display panel according to driving data generation common electric voltage.
Specifically, time schedule controller 21 is sent control data to multiple source electrode driver (Source by P2P signals
IC multiple common voltage generation circuits 22 on), multiple common voltage generation circuits 22 generate initial public according to the control data
Common voltage Vcom is supplied to the corresponding public electrode in multiple different viewing areas of display panel 1 to drive different viewing areas
Domain, then obtains the flash signal of a viewing area by outside detection module 23, and is carried out by signal processing module 24
Processing generation offset data feeds back to time schedule controller 21, and time schedule controller 21 generates new according to control data and offset data
Driving data give the common voltage generation circuit 22 of correspondence viewing area, common voltage generation circuit 22 generates new common electrical
Pressure is supplied to corresponding viewing area.The utility model feeds back to time schedule controller by the flash signal of viewing area, and then
The corresponding Vcom voltage in viewing area is adjusted, each viewing area is adjusted one by one, the public affairs of different zones can accurately be more adjusted
Common voltage Vcom, so that display panel reaches optimum state.
In a preferred embodiment, described device is also arranged on printed substrate (PCB) 2 including amplifier 25,
Common electric voltage for each common voltage generation circuit 22 to be exported is supplied to multiple viewing areas corresponding after being amplified
Public electrode.
Specifically, each viewing area can by a source electrode driver (Source IC) control can also be by multiple sources
Driver (Source IC) is controlled.
Each an amplifier can be correspondingly arranged on printed substrate (PCB) by source electrode driver (Source IC)
25, source electrode driver (Source IC) that can also be all sets an amplifier 25.
The common electric voltage adjusting means for the display panel that the utility model embodiment is provided, by the sudden strain of a muscle for obtaining display panel
Sparkle signal and handle generation offset data and feed back to time schedule controller, time schedule controller control is located at public on source electrode driver
Voltage generation circuit produces common electric voltage, saves the element and wiring space on printed substrate (PCB), realizes public
The adjust automatically of voltage.
The utility model additionally provides a kind of display device, including display panel and above-mentioned common electric voltage adjusting means.
According to embodiment of the present utility model as described above, these embodiments do not have all details of detailed descriptionthe,
Also it is only described specific embodiment not limit the utility model.Obviously, as described above, many modifications and change can be made
Change.This specification is chosen and specifically describes these embodiments, be in order to preferably explain principle of the present utility model and it is actual should
With so that skilled artisan can repairing using the utility model and on the basis of the utility model well
Change and use.The scope that protection domain of the present utility model should be defined by the utility model claim is defined.
Claims (10)
1. a kind of common electric voltage adjusting means of display panel, it is characterised in that including：
Time schedule controller, for providing display data and control data to display panel；
Common voltage generation circuit, the display panel is supplied to for generating initial common electric voltage according to the control data；
Detection module, the flash signal for obtaining display panel；
Signal processing module, for generating offset data according to the flash signal；
Wherein, the time schedule controller is additionally operable to according to the control data and offset data generation driving data；
The common voltage generation circuit is additionally operable to be supplied to the display panel according to driving data generation common electric voltage.
2. common electric voltage adjusting means according to claim 1, it is characterised in that the common voltage generation circuit is set
On the source electrode driver of the display panel.
3. common electric voltage adjusting means according to claim 1, it is characterised in that the display panel include viewing area and
Non-display area, wherein, the viewing area includes multiple viewing areas, and each viewing area is correspondingly arranged one source driver.
4. common electric voltage adjusting means according to claim 3, it is characterised in that the common voltage generation circuit difference
It is arranged on the corresponding source electrode driver in multiple viewing areas.
5. common electric voltage adjusting means according to claim 1, it is characterised in that also include：
Amplifier, is connected between the common voltage generation circuit and the display panel, for amplifying the common electric voltage
The common electric voltage of generative circuit output.
6. common electric voltage adjusting means according to claim 1, it is characterised in that the detection module is camera.
7. a kind of display device, it is characterised in that including display panel and common electric voltage adjusting means,
The common electric voltage adjusting means includes：
Time schedule controller, for providing display data and control data to display panel；
Common voltage generation circuit, the display panel is supplied to for generating initial common electric voltage according to the control data；
Detection module, the flash signal for obtaining display panel；
Signal processing module, for generating offset data according to the flash signal；
Wherein, the time schedule controller is additionally operable to according to the control data and offset data generation driving data；
The common voltage generation circuit is additionally operable to be supplied to the display panel according to driving data generation common electric voltage.
8. display device according to claim 7, it is characterised in that the common voltage generation circuit is arranged on display surface
On the source electrode driver of plate.
9. display device according to claim 7, it is characterised in that the display panel includes viewing area and non-display
Area, wherein, the viewing area includes multiple viewing areas, and each viewing area is correspondingly arranged one source driver.
10. display device according to claim 7, it is characterised in that the common electric voltage adjusting means also includes：
Amplifier, is connected between the common voltage generation circuit and the display panel, for amplifying the common electric voltage
The common electric voltage of generative circuit output.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720008042.9U CN206421807U (en) | 2017-01-04 | 2017-01-04 | The common electric voltage adjusting means and display device of display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720008042.9U CN206421807U (en) | 2017-01-04 | 2017-01-04 | The common electric voltage adjusting means and display device of display panel |
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| Publication Number | Publication Date |
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| CN206421807U true CN206421807U (en) | 2017-08-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108573684A (en) * | 2018-04-23 | 2018-09-25 | 京东方科技集团股份有限公司 | Display control method and device, computer readable storage medium, computer equipment |
| WO2020118758A1 (en) * | 2018-12-14 | 2020-06-18 | 深圳市华星光电半导体显示技术有限公司 | Common voltage regulating circuit and common voltage regulating method |
| US11087710B2 (en) | 2018-01-19 | 2021-08-10 | Apple Inc. | Dynamic VCOM compensation |
| CN113241043A (en) * | 2021-05-08 | 2021-08-10 | 深圳市华星光电半导体显示技术有限公司 | Common voltage adjusting device and electronic equipment |
-
2017
- 2017-01-04 CN CN201720008042.9U patent/CN206421807U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11087710B2 (en) | 2018-01-19 | 2021-08-10 | Apple Inc. | Dynamic VCOM compensation |
| CN108573684A (en) * | 2018-04-23 | 2018-09-25 | 京东方科技集团股份有限公司 | Display control method and device, computer readable storage medium, computer equipment |
| WO2020118758A1 (en) * | 2018-12-14 | 2020-06-18 | 深圳市华星光电半导体显示技术有限公司 | Common voltage regulating circuit and common voltage regulating method |
| CN113241043A (en) * | 2021-05-08 | 2021-08-10 | 深圳市华星光电半导体显示技术有限公司 | Common voltage adjusting device and electronic equipment |
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Address after: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee after: InfoVision Optoelectronics(Kunshan)Co.,Ltd. Address before: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Patentee before: INFOVISION OPTOELECTRONICS (KUNSHAN) Co.,Ltd. |
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