CN104732944B - Source electrode drive circuit, source driving method and display device - Google Patents
Source electrode drive circuit, source driving method and display device Download PDFInfo
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- CN104732944B CN104732944B CN201510165970.1A CN201510165970A CN104732944B CN 104732944 B CN104732944 B CN 104732944B CN 201510165970 A CN201510165970 A CN 201510165970A CN 104732944 B CN104732944 B CN 104732944B
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- gray scale
- scale voltage
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- source electrode
- operational amplifier
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000010586 diagram Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 description 3
- 239000002956 ash Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Abstract
The invention provides a kind of source electrode drive circuit, source driving method and display device.The source electrode drive circuit, including be respectively multiple data drive units that multiple data wires provide gray scale voltage；The source electrode drive circuit also includes：Switching time control unit, the two data drive unit timesharing for providing gray scale voltage for adjacent column data line for controlling export gray scale voltage.Source electrode drive circuit, source driving method and display device of the present invention, switching time control unit is used to control the two data drive unit timesharing for providing gray scale voltage for adjacent column data line to export gray scale voltage, to avoid Crosstalk (crosstalk) phenomenon influence to picture quality of the gray scale voltage between adjacent column data line.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of source electrode drive circuit, source driving method and display dress
Put.
Background technology
Currently, LCDs is light with its, ultra-thin, and the life of people is more and more come into the features such as multicolour and high definition
It is living.In order to show colourful picture, it is necessary to which source electrode drive circuit provides the gray scale voltage that GTG is shown.Gray scale voltage is to drawing
Face quality is most important, but Crosstalk (crosstalk) phenomenon of gray scale voltage between adjacent column data line directly influences
Picture quality.
As shown in figure 1, the existing source electrode drive circuit that gray scale voltage is provided for liquid crystal display device includes positive polarity number
Mould modular converter PDAC, negative polarity D/A converter module NDAC, the first operational amplifier O1 and the second operational amplifier, wherein,
When needing to produce positive polarity gray scale voltage, positive polarity D/A converter module PDAC work, according to digital data signal from
Corresponding positive polarity simulation gray scale voltage is selected in multiple positive polaritys simulation gray scale voltage of gal code functional block generation；Work as needs
When producing negative polarity gray scale voltage, negative polarity D/A converter module NDAC work, according to digital data signal from gal code work(
Corresponding negative polarity simulation gray scale voltage can be selected in multiple negative polarity simulation gray scale voltage of block generation, due to PDAC and
NDAC output loading capability is very low, therefore gray scale voltage is needed by the computings of the first operational amplifier O1 or described second
The large capacitive load on TFT-LCD (thin film transistor-liquid crystal display) data wire could be driven after amplifier O2 amplifications.
The content of the invention
It is a primary object of the present invention to provide a kind of source electrode drive circuit, source driving method and display device, to keep away
Exempt from Crosstalk (crosstalk) phenomenon influence to picture quality of the gray scale voltage between adjacent column data line.
In order to achieve the above object, the invention provides a kind of source electrode drive circuit, including it is respectively that multiple data wires carry
For multiple data drive units of gray scale voltage；The source electrode drive circuit also includes：
Switching time control unit, two data drive units point of gray scale voltage are provided for adjacent column data line for controlling
When export gray scale voltage.
During implementation, the data drive unit includes positive polarity D/A converter module and negative polarity D/A converter module；Root
According to positive polarity D/A converter module described in digital pixel data or the corresponding positive GTG of negative polarity D/A converter module output
Voltage or negative gray scale voltage.
During implementation, positive polarity D/A converter module and negative polarity D/A converter module point that the data drive unit includes
When export to the data wire.
During implementation, the data drive unit also includes data selector；
The output end of the positive polarity D/A converter module is connected with the first input end of the data selector；
The output end of the negative polarity D/A converter module is connected with the second input of the data selector；
The output end of the data selector is connected with the data wire.
Present invention also offers a kind of source driving method, including：
The control of switching time control unit provides two data drive units of gray scale voltage in timesharing for adjacent column data line
Export gray scale voltage.
During implementation, positive polarity D/A converter module that the data drive unit of gray scale voltage includes and negative is provided for data wire
Polarity D/A converter module timesharing is exported to the data wire.
Present invention also offers a kind of display device, including above-mentioned source electrode drive circuit.
Compared with prior art, source electrode drive circuit of the present invention, source driving method and display device, using cutting
Time control unit is changed to control the two data drive unit timesharing for providing gray scale voltage for adjacent column data line to export GTG electricity
Pressure, to avoid Crosstalk (crosstalk) phenomenon influence to picture quality of the gray scale voltage between adjacent column data line.
Brief description of the drawings
Fig. 1 is the structure chart of existing source electrode drive circuit；
Fig. 2 is the structure chart of the source electrode drive circuit described in the embodiment of the present invention；
Fig. 3 is the schematic diagram of the gray scale voltage of the source electrode drive circuit output described in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Source electrode drive circuit described in the embodiment of the present invention, including be respectively that multiple data wires provide the multiple of gray scale voltage
Data drive unit；The source electrode drive circuit also includes：
Switching time control unit, two data drive units point of gray scale voltage are provided for adjacent column data line for controlling
When export gray scale voltage.
Source electrode drive circuit described in the embodiment of the present invention uses switching time control unit to control as adjacent column data
Line provide gray scale voltage two data drive unit timesharing output gray scale voltage, with avoid gray scale voltage adjacent column data line it
Between influence of Crosstalk (crosstalk) phenomenons to picture quality.
, can be in the D/A converter module and fortune that the data drive unit being separated by includes according to a kind of specific embodiment
Increase buffer circuit (such as phase inverters of two series connection) between calculation amplifier, so as to control adjacent data drive unit timesharing
Gray scale voltage is exported to two adjacent data wires, so as to be transformed into during gray scale voltage dipole inversion, such as from positive polarity
During negative polarity, because having phase difference while will not take out electric current to gal code voltage causes to tie up that a voltage drop is excessive to be recovered in time
And cause crosstalk phenomenon.
Specifically, the data drive unit includes positive polarity D/A converter module and negative polarity D/A converter module；Root
According to positive polarity D/A converter module described in digital pixel data or the corresponding positive GTG of negative polarity D/A converter module output
Voltage or negative gray scale voltage.
Specifically, positive polarity D/A converter module and negative polarity D/A converter module point that the data drive unit includes
When export to the data wire.
Positive polarity D/A converter module and negative polarity D/A converter module can be caused because overlapping time is too short while is exported,
So as to cause gray scale voltage to export instantaneous short circuit, therefore the positive polarity D/A converter module and negative polarity D/A converter module are adopted
Exported with Non-Overlap (not overlapping) mode.
Specifically, the data drive unit also includes data selector；
The output end of the positive polarity D/A converter module is connected with the first input end of the data selector；
The output end of the negative polarity D/A converter module is connected with the second input of the data selector；
The output end of the data selector is connected with the data wire；
Source electrode drive circuit i.e. described in the embodiment of the present invention realizes that output is not overlapping using data selector.
Illustrate source electrode drive circuit of the present invention below according to a specific embodiment：
As shown in Fig. 2 a specific embodiment of source electrode drive circuit of the present invention includes carrying for the first column data line
The first data drive unit 21 for gray scale voltage and the second data drive unit that gray scale voltage is provided for the second column data line
22；
First data drive unit 21 includes the first positive polarity D/A converter module PDAC1, the first negative polarity digital-to-analogue
Modular converter NDAC1, the first data selector MUX1, the first operational amplifier 211 and the second operational amplifier 212；
Second data drive unit 22 includes the second positive polarity D/A converter module PDAC2, the second negative polarity digital-to-analogue
Modular converter NDAC2, the second data selector MUX2, the 3rd operational amplifier 221 and four-operational amplifier 222；
The first positive polarity D/A converter module PDAC1 passes through the first data selector MUX1 and the described first fortune
The normal phase input end connection of amplifier 211 is calculated, the first negative polarity D/A converter module NDAC1 is selected by first data
The normal phase input end that device MUX1 is selected with second operational amplifier 212 is connected；
The negative-phase input of first operational amplifier 211 is connected with the output end of first operational amplifier 211；
The negative-phase input of second operational amplifier 212 is connected with the output end of second operational amplifier 212；
Second positive polarity D/A converter module PDAC2 is connected with the first input end of the second data selector MUX2；
Second negative polarity D/A converter module NDAC2 is connected with the second input of the second data selector MUX2；
The inverting input of 3rd operational amplifier 221 is connected with the output end of the 3rd operational amplifier 221；
The inverting input of the four-operational amplifier 222 is connected with the output end of the four-operational amplifier 222；
The specific embodiment of source electrode drive circuit of the present invention also includes switching time control unit, for controlling
The two data drive unit timesharing that gray scale voltage is provided for adjacent column data line export gray scale voltage；
The switching time control unit includes the first buffer circuit 201 and the second buffer circuit 202；
First buffer circuit 201 includes the first phase inverter I1 and the second phase inverter I2 of series connection, first buffering
Circuit 201 is connected to the first output end of the second data selector MUX1 and the positive of the 3rd operational amplifier 221
Between input；
Second buffer circuit 202 includes the 3rd phase inverter I3 and the 4th phase inverter I4 of series connection, second buffering
Circuit 202 is connected to the second output end of the second data selector MUX1 and the positive of the four-operational amplifier 222
Between input；
In figure 3, G1 signs is not using the ash of the 3rd operational amplifier 221 output before the first buffer circuit 201
The timing diagram of rank voltage, G1 ' signs are the ashes for employing the first the 3rd operational amplifier 221 output afterwards of buffer circuit 201
The timing diagram of rank voltage, compared with G1, G1 ' delays a phase difference backward；
G2 signs are the gray scale voltages not exported using four-operational amplifier 222 before the second buffer circuit 202
Timing diagram, G1 ' signs are to employ the second gray scale voltage that four-operational amplifier 222 exports afterwards of buffer circuit 202
Timing diagram, compared with G2, G2 ' also delays a phase difference backward；
The specific embodiment of source electrode drive circuit of the present invention is as a result of the first buffer circuit 201 and second
Buffer circuit 202, realize and export gray scale voltage for adjacent column data line timesharing, to avoid gray scale voltage in adjacent column data line
Between influence of Crosstalk (crosstalk) phenomenons to picture quality；
Also, the specific embodiment of source electrode drive circuit of the present invention is realized as a result of MUX1 and MUX2
Positive polarity D/A converter module and negative polarity D/A converter module are exported by the way of Non-Overlap (not overlapping).
Source driving method described in the embodiment of the present invention includes：
The control of switching time control unit provides two data drive units of gray scale voltage in timesharing for adjacent column data line
Export gray scale voltage.
Specifically, provide positive polarity D/A converter module that the data drive unit of gray scale voltage includes and negative for data wire
Polarity D/A converter module timesharing is exported to the data wire.
Display device described in the embodiment of the present invention includes above-mentioned source electrode drive circuit.
The display device can be liquid crystal display, LCD TV, OLED (Organic Light-Emitting
Diode, organic electroluminescent LED) display device such as display panel, OLED display, OLED TVs or Electronic Paper.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of source electrode drive circuit, including be respectively multiple data drive units that multiple data wires provide gray scale voltage；Its
It is characterised by, the source electrode drive circuit also includes：
Switching time control unit, the two data drive unit timesharing for providing gray scale voltage for adjacent column data line for controlling are defeated
Go out gray scale voltage；
The switching time control unit includes buffer circuit；
The buffer circuit is arranged at the output end of the data drive unit of the second column data line in the adjacent column data line
Between second column data line.
2. source electrode drive circuit as claimed in claim 1, it is characterised in that the data drive unit includes positive polarity digital-to-analogue
Modular converter and negative polarity D/A converter module；Positive polarity D/A converter module or the negative pole according to digital pixel data
Property the corresponding positive gray scale voltage of D/A converter module output or negative gray scale voltage.
3. source electrode drive circuit as claimed in claim 2, it is characterised in that the positive polarity number that the data drive unit includes
Mould modular converter and negative polarity D/A converter module timesharing are exported to the data wire.
4. source electrode drive circuit as claimed in claim 3, it is characterised in that
The buffer circuit includes the first buffer circuit and the second buffer circuit；
The data drive unit that gray scale voltage is provided for second column data line also includes the second data selector, the 3rd fortune
Calculate amplifier and four-operational amplifier；
The positive polarity D/A converter module provided for second column data line in the data drive unit of gray scale voltage it is defeated
Go out end to be connected with the first input end of second data selector；The number that gray scale voltage is provided for second column data line
It is connected according to the output end of the negative polarity D/A converter module in driver element with the second input of second data selector；
First buffer circuit is connected to the first output end of second data selector and the 3rd operational amplifier
Normal phase input end between；Second buffer circuit is connected to the second output end of second data selector and described the
Between the normal phase input end of four-operational amplifier；
The inverting input of 3rd operational amplifier is connected with the output end of the 3rd operational amplifier；
The inverting input of the four-operational amplifier is connected with the output end of the four-operational amplifier；
The output end of 3rd operational amplifier and the output end of the four-operational amplifier all with second column data line
Connection.
5. a kind of source driving method, applied to the source electrode drive circuit as described in any claim in Claims 1-4,
Characterized in that, the source driving method includes：
Two data drive units that the control of switching time control unit provides gray scale voltage for adjacent column data line export in timesharing
Gray scale voltage.
6. source driving method as claimed in claim 5, it is characterised in that the data-driven of gray scale voltage is provided for data wire
The positive polarity D/A converter module and negative polarity D/A converter module timesharing that unit includes are exported to the data wire.
7. a kind of display device, including the source electrode drive circuit as described in any claim in Claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510165970.1A CN104732944B (en) | 2015-04-09 | 2015-04-09 | Source electrode drive circuit, source driving method and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510165970.1A CN104732944B (en) | 2015-04-09 | 2015-04-09 | Source electrode drive circuit, source driving method and display device |
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| Publication Number | Publication Date |
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| CN104732944A CN104732944A (en) | 2015-06-24 |
| CN104732944B true CN104732944B (en) | 2018-02-13 |
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| CN201510165970.1A Expired - Fee Related CN104732944B (en) | 2015-04-09 | 2015-04-09 | Source electrode drive circuit, source driving method and display device |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI576806B (en) * | 2015-09-23 | 2017-04-01 | 矽創電子股份有限公司 | Power supply module of driving device in display system, related driving device and power supply method |
| CN107578740B (en) * | 2017-09-26 | 2019-11-08 | 北京集创北方科技股份有限公司 | Display device, source electrode drive circuit and display system |
| CN108154857B (en) * | 2017-12-29 | 2019-12-13 | 深圳市华星光电半导体显示技术有限公司 | gamma reference voltage generating circuit, driving circuit and method of liquid crystal display panel |
| CN109192162A (en) * | 2018-10-09 | 2019-01-11 | 湖南国科微电子股份有限公司 | Thin film transistor (TFT) LCD driving device |
| CN110930939B (en) * | 2019-12-27 | 2021-04-02 | 深圳市明微电子股份有限公司 | Display screen output port crosstalk prevention method and device |
| CN112927660B (en) * | 2021-02-09 | 2022-12-06 | 重庆京东方光电科技有限公司 | Driving circuit, driving method thereof and display panel |
| CN113674710A (en) * | 2021-07-15 | 2021-11-19 | 北海惠科光电技术有限公司 | Display gray scale binding voltage adjusting method, display and medium |
| US11842671B2 (en) * | 2022-03-07 | 2023-12-12 | Hyphy Usa Inc. | Spread-spectrum video transport source driver integration with display panel |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100864918B1 (en) * | 2001-12-26 | 2008-10-22 | 엘지디스플레이 주식회사 | Apparatus for driving data of liquid crystal display |
| KR100840675B1 (en) * | 2002-01-14 | 2008-06-24 | 엘지디스플레이 주식회사 | Mehtod and apparatus for driving data of liquid crystal display |
| CN100511393C (en) * | 2005-12-16 | 2009-07-08 | 中华映管股份有限公司 | Device and method for point-reversing driving liquid-crystal display panel of analog thin-film transistor |
| JP4306748B2 (en) * | 2007-03-13 | 2009-08-05 | セイコーエプソン株式会社 | Electro-optical device, driving method of electro-optical device, and electronic apparatus |
| US8830155B2 (en) * | 2009-10-30 | 2014-09-09 | Au Optronics Corporation | Method and source driver for driving liquid crystal display |
| KR101451589B1 (en) * | 2012-12-11 | 2014-10-16 | 엘지디스플레이 주식회사 | Driving apparatus for image display device and method for driving the same |
| CN103165095B (en) * | 2013-03-29 | 2016-04-27 | 深圳市华星光电技术有限公司 | A kind of driving circuit of liquid crystal panel, liquid crystal panel and a kind of driving method |
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