CN104123919B - Liquid crystal display device and display device - Google Patents
Liquid crystal display device and display device Download PDFInfo
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- CN104123919B CN104123919B CN201310303429.3A CN201310303429A CN104123919B CN 104123919 B CN104123919 B CN 104123919B CN 201310303429 A CN201310303429 A CN 201310303429A CN 104123919 B CN104123919 B CN 104123919B
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Abstract
The present invention provides a kind of liquid crystal display device and display device.Display device includes display unit, public voltage generating circuit plus horse correcting circuit, drive circuit and power-switching circuit.Public voltage generating circuit provides common electric voltage to display unit.Plus the output of horse correcting circuit plus horse voltage.Drive circuit according to plus horse voltage provide gray scale voltage to display unit.Power-switching circuit include the first change-over circuit and the second change-over circuit, first, second change-over circuit be input be used for be connected with a power supply and remainder be separate and discrete two parallel branch each other.First change-over circuit produces the first supply voltage, and the second change-over circuit produces second source voltage, and first, second supply voltage is exported to adding horse correcting circuit and public voltage generating circuit respectively.Plus horse correcting circuit voltage on the basis of the first supply voltage is produced plus horse voltage.Public voltage generating circuit voltage on the basis of second source voltage produces common electric voltage.
Description
Technical field
The present invention relates to a kind of Display Technique, especially with respect to liquid crystal display device and display device.
Background technology
Display device, such as liquid crystal display device, due to display medium (such as：Liquid crystal) self-characteristic, it is necessary to one plus horse
(gamma) correcting circuit provides multiple gamma voltages, is carried out with the display data inputted to signal source plus horse correction, through adding horse
Display data after correction, i.e. gamma voltages, and with being driven jointly from the common electric voltage produced by public voltage generating circuit
Dynamic display device, could cause display device to show the relatively good display picture of color.
So, the display device provides same analog power voltage (AVDD) to the gamma correction circuit and the common electric voltage
Generation circuit is used as reference voltage.The gamma correction circuit produces the plurality of gamma voltages according to the AVDD.The common electric voltage
Generation circuit produces the common electric voltage according to the AVDD.Due to the gamma correction circuit and the public voltage generating circuit with
Voltage produces respective voltage on the basis of same AVDD, therefore, when in the gamma voltages and the common electric voltage this two classes voltage
One of class voltage be interfered, cause spread of voltage, all further can largely influence the stabilization of another kind of voltage
Property.So as to so that easily there is crosstalk (crosstalk) phenomenon in the display picture of the display device, influences picture quality.
The content of the invention
Easily there are crosstalk phenomenons in display picture for solution prior art display device, and influences display picture product
The technical problem of matter, it is necessary to which a kind of preferable display device of display picture quality is provided.
Easily there are crosstalk phenomenons to solve the display picture of prior art liquid crystal display device, and influence to show picture
The technical problem of face quality, it is necessary to which a kind of preferable liquid crystal display device of display picture quality is provided.
A kind of liquid crystal display device, it includes：
Liquid crystal display panel, the liquid crystal display panel includes multiple display units；
Public voltage generating circuit, the public voltage generating circuit provides common electric voltage to the plurality of display unit；
Plus horse correcting circuit, horse correcting circuit should be added to provide multiple plus horse voltage, and it is defeated according to the display data received
Go out and add horse voltage accordingly；
Drive circuit, the drive circuit receives add horse correcting circuit from this plus horse voltage, and according to receiving plus
Horse voltage provides corresponding gray scale voltage to the plurality of display unit, with cause the plurality of display unit the gray scale voltage with
Display picture under the driving of common electric voltage；With
Power-switching circuit, the power-switching circuit includes the first change-over circuit and the second change-over circuit, first conversion
Circuit includes first input end and the first output end, and second change-over circuit includes the second input and the second output end, and this
One change-over circuit and second change-over circuit be the first input end, second input be used to be connected with a power supply and
Remainder discrete two parallel branch for separation each other, the first input end is used to receive with second input to be come
The supply voltage exported from the power supply, first change-over circuit produces the first supply voltage according to the supply voltage, and passes through
First output end exports first supply voltage to that should add horse correcting circuit, and second change-over circuit is produced according to the supply voltage
Raw second source voltage, and the second source voltage is exported to the public voltage generating circuit by second output end, it should add
Horse voltage produces the plurality of plus horse voltage by the reference voltage of first supply voltage, the public voltage generating circuit with this
Voltage produces the common electric voltage on the basis of two supply voltages.
A kind of display device, it includes：
Display panel, the display panel includes multiple display units；
Public voltage generating circuit, the public voltage generating circuit provides common electric voltage to the plurality of display unit；
Plus horse correcting circuit, horse correcting circuit should be added to provide multiple plus horse voltage, and it is defeated according to the display data received
Go out and add horse voltage accordingly；
Drive circuit, the drive circuit receives add horse correcting circuit from this plus horse voltage, and according to receiving plus
Horse voltage provides corresponding gray scale voltage to the plurality of display unit, with cause the plurality of display unit the gray scale voltage with
Display picture under the driving of common electric voltage；With
Power-switching circuit, the power-switching circuit includes the first change-over circuit and the second change-over circuit, first conversion
Circuit includes first input end and the first output end, and second change-over circuit includes the second input and the second output end, and this
One change-over circuit and second change-over circuit be the first input end, second input be used to be connected with a power supply and
Remainder discrete two parallel branch for separation each other, the first input end is used to receive with second input to be come
The supply voltage exported from the power supply, first change-over circuit produces the first supply voltage according to the supply voltage, and passes through
First output end exports first supply voltage to that should add horse correcting circuit, and second change-over circuit is produced according to the supply voltage
Raw second source voltage, and the second source voltage is exported to the public voltage generating circuit by second output end, it should add
Horse voltage produces the plurality of plus horse voltage by the reference voltage of first supply voltage, the public voltage generating circuit with this
Voltage produces the common electric voltage on the basis of two supply voltages.
Compared to prior art, because the liquid crystal display device and the power-switching circuit of the display device include first
Change-over circuit and the second change-over circuit, first change-over circuit and second change-over circuit for input is connected with a power supply and
Remainder discrete two parallel branch for separation each other, therefore, the first electricity exported by first change-over circuit
The degree that the second source voltage that source voltage is exported with second change-over circuit is interfered with each other can be greatly reduced, so that after
The degree that the gray scale voltage in face is interfered with each other with common electric voltage can also be greatly reduced.Correspondingly, the liquid crystal display device and should
The display picture of display device can avoid the occurrence of crosstalk phenomenon or crosstalk phenomenon is lighter so that, the liquid crystal display device and should
The display picture quality of display device is preferable.
Brief description of the drawings
Fig. 1 is the frame structure schematic diagram of the better embodiment of liquid crystal display device one of the present invention.
Main element symbol description
| Liquid crystal display device | 100 | Power supply | 200 |
| Signal source | 300 | Power-switching circuit | 10 |
| Sequential control circuit | 15 | Plus horse correcting circuit | 20 |
| Drive circuit | 30 | Public voltage generating circuit | 40 |
| Liquid crystal display panel | 50 | First bleeder circuit | 60 |
| Second bleeder circuit | 70 | First change-over circuit | 101 |
| Second change-over circuit | 103 | First input end | 111 |
| First output end | 121 | Second input | 113 |
| Second output end | 123 | First resistor | R1 |
| Second resistance | R2 | 3rd resistor | R3 |
| 4th resistance | R4 | First electric capacity | C1 |
| Second electric capacity | C2 | Display unit | 502 |
| First node | N1 | Section Point | N2 |
| First supply voltage | V1 | Second source voltage | V2 |
| First reference voltage | VR1 | Second reference voltage | VR2 |
| Common electric voltage | Vcom |
Following embodiment will further illustrate the present invention with reference to above-mentioned accompanying drawing.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.The present embodiment is by taking liquid crystal display device as an example
Illustrate, the present invention can also be applied to the display device of other suitable types.
Referring to Fig. 1, Fig. 1 is the frame structure schematic diagram of the better embodiment of liquid crystal display device one of the present invention.The liquid
Crystal device 100 includes power-switching circuit 10, sequential control circuit 15 plus horse (gamma) correcting circuit 20, drive circuit
30th, public voltage generating circuit 40, liquid crystal display panel 50, the first bleeder circuit 60 and the second bleeder circuit 70.The power supply turns
Circuit 10 is changed with that horse correcting circuit 20, the public voltage generating circuit 40 should be added to be electrically connected.The sequential control circuit 15 with
Horse correcting circuit 20, the drive circuit 30 should be added to be electrically connected.First bleeder circuit 60 and the power-switching circuit 10, should
Plus horse correcting circuit 20 is electrically connected.Second bleeder circuit 70 produces electricity with the power-switching circuit 10, the common electric voltage
Road 40 is electrically connected.The drive circuit 30 and the public voltage generating circuit 40 are electrically connected with the liquid crystal display panel 50 respectively
Connect.
The power-switching circuit 10 includes the first change-over circuit 101 and the second change-over circuit 103.First change-over circuit
101 and second change-over circuit 103 be two independent change-over circuits.It is appreciated that first change-over circuit 101 and second conversion electricity
Road 103 is two voltage conversion integrated circuits, respectively with independent voltage output.Specifically, the first change-over circuit 101 includes the
One input 111 and the first output end 121.Second change-over circuit 103 includes the second input 113 and the second output end 123.
First change-over circuit 101 and second change-over circuit 103 be the first input end 111, second input 113 be used to
One power supply 200 is connected and remainder is to separate and discrete two parallel branch each other.First output end 121 with
Horse correcting circuit 20, first bleeder circuit 60 should be added to be electrically connected.Second output end 123 produces electricity with the common electric voltage
Road 40, second bleeder circuit 70 are electrically connected.The power supply 200 can be for external power source (such as：220V powers), or the liquid crystal
The internal electric source of showing device 100 is (such as：Battery etc.).
The liquid crystal display panel 50 includes multiple display units 502.The plurality of display unit 502 is used for display picture, with
The drive circuit 30 and the public voltage generating circuit 40 are electrically connected.
The sequential control circuit 15 is used to be connected with a signal source 300, receives the display signal from the signal source 300,
And according to the display signal that receives provide corresponding display data to should plus horse correcting circuit 20 and providing control accordingly
Signal is to the drive circuit 30.
The first input end 111 and second input 113 are all used to receive the supply voltage that the power supply 200 is provided.
The supply voltage correspondence that first change-over circuit 101 is provided according to the power supply 200 produces the first supply voltage V1, and passes through this
First output end 121 exports first supply voltage V1 to this plus horse correcting circuit 20 and first bleeder circuit 60.This second
The supply voltage correspondence that change-over circuit 103 is provided according to the power supply 200 produces second source voltage V2, and second defeated by this
Go out end 123 and export second source voltage V2 to the public voltage generating circuit 40 and second bleeder circuit 70.In this implementation
In mode, the first supply voltage V1 and second source voltage V2 is two voltages differed.So, in other change embodiment party
In formula, the first supply voltage V1 and second source voltage V2 also can be as needed for the voltage of identical two.
First bleeder circuit 60 receives first supply voltage V1, and partial pressure correspondence is carried out to first supply voltage V1 and is produced
Horse correcting circuit 20 should extremely be added by giving birth to the first reference voltage VR1, and exporting first reference voltage VR1.Preferably, first partial pressure
Circuit 60 includes first resistor R1 and second resistance R2.First resistor R1 and second resistance R2 is connected in series in the power supply and turned
Change between the first output end 121 of circuit 10 and ground.First node N1 is defined between first resistor R1 and second resistance R2.
First node N1 is electrically connected to this plus horse correcting circuit 20, for this plus first reference voltage VR1 of the offer of horse correcting circuit 20.Should
First reference voltage VR1 is the voltage at first node N1.In the present embodiment, the liquid crystal display device 100 enters one
Step includes the first electric capacity C1, and the first electric capacity C1 is connected in parallel with first bleeder circuit 60, for voltage stabilizing.
Horse correcting circuit 20 should be added to receive the first supply voltage V1 and first reference voltage VR1, with first power supply
Voltage on the basis of voltage V1, multiple plus horse voltage is produced according to first reference voltage VR1.Horse correcting circuit 20 should be added further
The display data exported from the sequential control circuit 15 is received, horse voltage is added to the drive according to display data output accordingly
Dynamic circuit 30, to carry out adding horse correction to the display signal from the signal source 300.
The drive circuit 30 receives control signal from the sequential control circuit 15 and from this plus horse correcting circuit
20 plus horse voltage, change receive plus horse voltage into corresponding gray scale voltage, and according to receive the control signal offer
Gray scale voltage is to corresponding display unit 502.
Second bleeder circuit 70 receives second source voltage V2, and partial pressure correspondence is carried out to second source voltage V2 and is produced
Raw second reference voltage VR2, and the second reference voltage VR2 is exported to the public voltage generating circuit 40.Preferably, this second
Bleeder circuit 70 includes 3rd resistor R3 and the 4th resistance R4.3rd resistor R3 and the 4th resistance R4 is connected in series in the electricity
Between the second output end 123 and ground of power-switching circuit 10.Second section is defined between 3rd resistor R3 and the 4th resistance R4
Point N2.Section Point N2 is electrically connected to the public voltage generating circuit 40, to provide for the public voltage generating circuit 40
Two reference voltage VR2.Second reference voltage VR2 is the voltage at Section Point N2.In the present embodiment, the liquid crystal
Display device 100 further comprises the second electric capacity C2, and the second electric capacity C2 is connected in parallel with second bleeder circuit 70, for steady
Pressure.
The public voltage generating circuit 40 receives the second source voltage V2 and second reference voltage VR2, with this second
Voltage on the basis of supply voltage V2, produces common electric voltage Vcom, and export the common electric voltage according to second reference voltage VR2
Vcom is to the plurality of display unit 502, to cause the plurality of display unit 502 in the gray scale voltage with common electric voltage Vcom's
The lower display picture of driving.
Because the power-switching circuit 10 of the liquid crystal display device 100 includes the first change-over circuit 101 and the second conversion electricity
Road 103, the first output end 121 of first change-over circuit 101 and the second output end 123 of second change-over circuit 103 are mutually not
Connection, therefore, the first supply voltage V1 exported by first change-over circuit 101 is exported with second change-over circuit 103
The degree that interferes with each other of second source voltage V2 can greatly reduce so that gray scale voltage and common electric voltage Vcom below
The degree interfered with each other can also be greatly reduced.Even if a supply voltage is by dry in first, second supply voltage V1, V2
Disturb, cause spread of voltage, all without largely influenceing the stability of another supply voltage.So as to GTG below
Voltage and common electric voltage Vcom will not be a greater impact.
In turn, the class voltage in this two classes voltage of gray scale voltage below and common electric voltage Vcom is interfered, and makes
Into spread of voltage, all without largely influenceing the stability of another kind of voltage.So as to the first supply voltage above
V1 and second source voltage V2 also will not be a greater impact, and then avoid further influenceing GTG electricity below in turn again
Pressure or common electric voltage Vcom.In this way, the display picture of the liquid crystal display device 100 can avoid the occurrence of crosstalk (crosstalk) now
As or crosstalk phenomenon it is lighter so that, the display picture quality of the liquid crystal display device 100 is preferable.
Claims (8)
1. a kind of liquid crystal display device, it includes：
Liquid crystal display panel, the liquid crystal display panel includes multiple display units；
Public voltage generating circuit, the public voltage generating circuit provides common electric voltage to the plurality of display unit；
Plus horse correcting circuit, horse correcting circuit should be added to provide multiple plus horse voltage, and receive display data, and it is aobvious according to what is received
Show that data output adds horse voltage accordingly；
Drive circuit, the drive circuit receives add horse correcting circuit from this plus horse voltage, and according to receive plus horse electricity
Pressure provides corresponding gray scale voltage to the plurality of display unit, with cause the plurality of display unit the gray scale voltage with it is public
Display picture under the driving of voltage；
Sequential control circuit, the sequential control circuit is used to be connected with a signal source, receives the display signal from the signal source,
And corresponding display data is provided to plus horse correcting circuit and corresponding control letter should be provided according to the display signal that receives
Number arrive the drive circuit；With
Power-switching circuit；
It is characterized in that：The power-switching circuit includes the first change-over circuit and the second change-over circuit, the first change-over circuit bag
First input end and the first output end are included, second change-over circuit includes the second input and the second output end, first conversion
Circuit is the first input end with second change-over circuit, second input is used to be connected and its remaining part with a power supply
It is divided into and separates and discrete two parallel branch each other, the first input end is used to receive with second input comes from the electricity
The supply voltage that source is exported, first change-over circuit according to the supply voltage produce the first supply voltage, and by this first
Output end exports first supply voltage to that should add horse correcting circuit, and second change-over circuit produces second according to the supply voltage
Supply voltage, and the second source voltage is exported to the public voltage generating circuit by second output end, horse voltage should be added
Voltage produces the plurality of plus horse voltage on the basis of first supply voltage, and the public voltage generating circuit is with second source electricity
Voltage produces the common electric voltage on the basis of pressure；
The liquid crystal display device further comprises the first bleeder circuit, and first supply voltage is divided through first bleeder circuit
Pressure correspondence produces the first reference voltage, horse correcting circuit should be added to receive first supply voltage and first reference voltage, and root
The plurality of plus horse voltage is produced according to first reference voltage.
2. liquid crystal display device as claimed in claim 1, it is characterised in that：First supply voltage and the second source voltage
It is different.
3. liquid crystal display device as claimed in claim 1, it is characterised in that：First supply voltage and the second source voltage
For the voltage of identical two.
4. liquid crystal display device as claimed in claim 1, it is characterised in that：The liquid crystal display device further comprises second point
Volt circuit, the second source voltage carries out partial pressure correspondence through second bleeder circuit and produces the second reference voltage, the common electric voltage
Generation circuit receives the second source voltage and second reference voltage, and produces the common electrical according to second reference voltage
Pressure.
5. a kind of display device, it includes：
Display panel, the display panel includes multiple display units；
Public voltage generating circuit, the public voltage generating circuit provides common electric voltage to the plurality of display unit；
Plus horse correcting circuit, horse correcting circuit should be added to provide multiple plus horse voltage, and receive display data, and it is aobvious according to what is received
Show that data output adds horse voltage accordingly；
Drive circuit, the drive circuit receives add horse correcting circuit from this plus horse voltage, and according to receive plus horse electricity
Pressure provides corresponding gray scale voltage to the plurality of display unit, with cause the plurality of display unit the gray scale voltage with it is public
Display picture under the driving of voltage；
Sequential control circuit, the sequential control circuit is used to be connected with a signal source, receives the display signal from the signal source,
And corresponding display data is provided to plus horse correcting circuit and corresponding control letter should be provided according to the display signal that receives
Number arrive the drive circuit；With
Power-switching circuit；
It is characterized in that：The power-switching circuit includes the first change-over circuit and the second change-over circuit, the first change-over circuit bag
First input end and the first output end are included, second change-over circuit includes the second input and the second output end, first conversion
Circuit is the first input end with second change-over circuit, second input is used to be connected and its remaining part with a power supply
It is divided into and separates and discrete two parallel branch each other, the first input end is used to receive with second input comes from the electricity
The supply voltage that source is exported, first change-over circuit according to the supply voltage produce the first supply voltage, and by this first
Output end exports first supply voltage to that should add horse correcting circuit, and second change-over circuit produces second according to the supply voltage
Supply voltage, and the second source voltage is exported to the public voltage generating circuit by second output end, horse voltage should be added
Voltage produces the plurality of plus horse voltage on the basis of first supply voltage, and the public voltage generating circuit is with second source electricity
Voltage produces the common electric voltage on the basis of pressure；
The display device further comprises the first bleeder circuit, and first supply voltage carries out partial pressure pair through first bleeder circuit
The first reference voltage should be produced, horse correcting circuit should be added to receive first supply voltage and first reference voltage, and according to this
First reference voltage produces the plurality of plus horse voltage.
6. display device as claimed in claim 5, it is characterised in that：First supply voltage and the second source voltage are not
Together.
7. display device as claimed in claim 5, it is characterised in that：First supply voltage is phase with the second source voltage
Two same voltages.
8. display device as claimed in claim 5, it is characterised in that：The display device further comprises the second bleeder circuit,
The second source voltage carries out partial pressure correspondence through second bleeder circuit and produces the second reference voltage, the public voltage generating circuit
The second source voltage and second reference voltage are received, and the common electric voltage is produced according to second reference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310303429.3A CN104123919B (en) | 2013-07-19 | 2013-07-19 | Liquid crystal display device and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310303429.3A CN104123919B (en) | 2013-07-19 | 2013-07-19 | Liquid crystal display device and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104123919A CN104123919A (en) | 2014-10-29 |
| CN104123919B true CN104123919B (en) | 2017-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310303429.3A Active CN104123919B (en) | 2013-07-19 | 2013-07-19 | Liquid crystal display device and display device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102348701B1 (en) * | 2015-05-31 | 2022-01-06 | 엘지디스플레이 주식회사 | Liquid crystal display apparatus |
| CN106297701B (en) * | 2016-08-31 | 2018-12-25 | 深圳市华星光电技术有限公司 | LCD frame flicker phenomenon control circuit |
| CN108597466A (en) * | 2018-04-25 | 2018-09-28 | 深圳市华星光电技术有限公司 | Compensation gamma voltages improve the circuit and display device that crosstalk is coupled |
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| CN1424869A (en) * | 2002-12-19 | 2003-06-18 | 台达电子工业股份有限公司 | Method for eliminating noise and its disturbance by printing circuit board ground wiring |
| CN101211036A (en) * | 2006-12-29 | 2008-07-02 | 群康科技(深圳)有限公司 | LCD device and its display method |
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| KR100418922B1 (en) * | 2001-03-07 | 2004-02-14 | 엘지.필립스 엘시디 주식회사 | Gamma reference voltage generating circuit in TFT-LCD |
| US7030842B2 (en) * | 2002-12-27 | 2006-04-18 | Lg.Philips Lcd Co., Ltd. | Electro-luminescence display device and driving method thereof |
| JP2007065134A (en) * | 2005-08-30 | 2007-03-15 | Sanyo Epson Imaging Devices Corp | Liquid crystal display |
| CN100533537C (en) * | 2006-06-01 | 2009-08-26 | 瀚宇彩晶股份有限公司 | Driving device for increasing bit and method |
| CN101373583B (en) * | 2007-08-21 | 2010-08-25 | 联咏科技股份有限公司 | Device and method for generating gamma reference voltage and apparatus for generating grayscale voltage |
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| CN1424869A (en) * | 2002-12-19 | 2003-06-18 | 台达电子工业股份有限公司 | Method for eliminating noise and its disturbance by printing circuit board ground wiring |
| CN101211036A (en) * | 2006-12-29 | 2008-07-02 | 群康科技(深圳)有限公司 | LCD device and its display method |
| CN101364388A (en) * | 2007-08-07 | 2009-02-11 | 奇美电子股份有限公司 | Novel integrated DC transducer applied to LCD |
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