CN104732944A - Source drive circuit, source drive method and display device - Google Patents
Source drive circuit, source drive method and display device Download PDFInfo
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- CN104732944A CN104732944A CN201510165970.1A CN201510165970A CN104732944A CN 104732944 A CN104732944 A CN 104732944A CN 201510165970 A CN201510165970 A CN 201510165970A CN 104732944 A CN104732944 A CN 104732944A
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- gray scale
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Abstract
The invention provides a source drive circuit, a source drive method and a display device. The source drive circuit comprises a plurality of data drive units for providing gray scale voltage for a plurality of data lines. The source drive circuit further comprises a switching time control unit used for controlling the two data drive units providing the gray scale voltage for the adjacent data lines to output the gray scale voltage in a time-sharing mode. According to the source drive circuit, the source drive method and the display device, the switching time control unit is adopted for controlling the two data drive units providing the gray scale voltage for the adjacent data lines to output the gray scale voltage in the time-sharing mode so as to prevent Crossstalk, between every two adjacent data lines, of the gray scale voltage from influencing the image quality.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of source electrode drive circuit, source driving method and display device.
Background technology
Current, LCDs is light with it, ultra-thin, and the feature such as multicolour and high definition more and more comes into the life of people.In order to show colourful picture, need the gray scale voltage that source electrode drive circuit provides GTG to show.Gray scale voltage is most important to picture quality, but the Crosstalk of gray scale voltage between adjacent column data line (crosstalk) phenomenon has directly had influence on picture quality.
As shown in Figure 1, existingly the source electrode drive circuit of gray scale voltage is provided to comprise positive polarity D/A converter module PDAC, negative polarity D/A converter module NDAC, the first operational amplifier O1 and the second operational amplifier for liquid crystal indicator, wherein, when needs produce positive polarity gray scale voltage, described positive polarity D/A converter module PDAC works, and selects corresponding positive polarity simulation gray scale voltage according to digital data signal from multiple positive polarity simulation gray scale voltages that gal code function block generates; When needs produce negative polarity gray scale voltage, described negative polarity D/A converter module NDAC works, from multiple negative polarity simulation gray scale voltages that gal code function block generates, corresponding negative polarity simulation gray scale voltage is selected according to digital data signal, because the output loading capability of PDAC and NDAC is very low, therefore gray scale voltage needs the large capacitive load after described first operational amplifier O1 or described second operational amplifier O2 amplifies on ability drive TFT-LCD (thin film transistor-liquid crystal display) data line.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of source electrode drive circuit, source driving method and display device, to avoid the Crosstalk of gray scale voltage between adjacent column data line (crosstalk) phenomenon on the impact of picture quality.
In order to achieve the above object, the invention provides a kind of source electrode drive circuit, comprise and be respectively multiple data drive unit that multiple data line provides gray scale voltage; Described source electrode drive circuit also comprises:
Switching time control module, for control for adjacent column data line provide gray scale voltage two data drive unit timesharing export gray scale voltages.
During enforcement, described data drive unit comprises positive polarity D/A converter module and negative polarity D/A converter module; According to digital pixel data, positive polarity D/A converter module or described negative polarity D/A converter module export corresponding positive gray scale voltage or negative gray scale voltage.
During enforcement, the positive polarity D/A converter module that described data drive unit comprises and the timesharing of negative polarity D/A converter module export described data line to.
During enforcement, described data drive unit also comprises data selector;
The output terminal of described positive polarity D/A converter module is connected with the first input end of described data selector;
The output terminal of described negative polarity D/A converter module is connected with the second input end of described data selector;
The output terminal of described data selector is connected with described data line.
Present invention also offers a kind of source driving method, comprising:
Switching time, control module controlled to provide two data drive unit of gray scale voltage to export gray scale voltage in timesharing for adjacent column data line.
During enforcement, the positive polarity D/A converter module providing the data drive unit of gray scale voltage to comprise for data line and the timesharing of negative polarity D/A converter module export described data line to.
Present invention also offers a kind of display device, comprise above-mentioned source electrode drive circuit.
Compared with prior art, source electrode drive circuit of the present invention, source driving method and display device, employing control module switching time controls as adjacent column data line provides two data drive unit timesharing of gray scale voltage to export gray scale voltages, to avoid the Crosstalk of gray scale voltage between adjacent column data line (crosstalk) phenomenon on the impact of picture quality.
Accompanying drawing explanation
Fig. 1 is the structural drawing of existing source electrode drive circuit;
Fig. 2 is the structural drawing 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 that the source electrode drive circuit described in the embodiment of the present invention exports.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Source electrode drive circuit described in the embodiment of the present invention, comprises and is respectively multiple data drive unit that multiple data line provides gray scale voltage; Described source electrode drive circuit also comprises:
Switching time control module, for control for adjacent column data line provide gray scale voltage two data drive unit timesharing export gray scale voltages.
Source electrode drive circuit employing control module switching time described in the embodiment of the present invention controls as adjacent column data line provides two data drive unit timesharing of gray scale voltage to export gray scale voltages, to avoid the Crosstalk of gray scale voltage between adjacent column data line (crosstalk) phenomenon on the impact of picture quality.
According to a kind of concrete embodiment, buffer circuit (phase inverters of such as two series connection) is increased between the D/A converter module that can comprise at the data drive unit of being separated by and operational amplifier, thus control adjacent data drive unit timesharing to two adjacent data lines output gray scale voltages, thus in gray scale voltage dipole inversion process, such as, when being transformed into negative polarity from positive polarity, causing and tie up excessive can not the recovery in time of point voltage pressure drop because there is phase differential can not take out electric current to gal code voltage simultaneously and cause crosstalk phenomenon.
Concrete, described data drive unit comprises positive polarity D/A converter module and negative polarity D/A converter module; According to digital pixel data, positive polarity D/A converter module or described negative polarity D/A converter module export corresponding positive gray scale voltage or negative gray scale voltage.
Concrete, the positive polarity D/A converter module that described data drive unit comprises and the timesharing of negative polarity D/A converter module export described data line to.
Because too short meeting overlapping time causes positive polarity D/A converter module and negative polarity D/A converter module to export simultaneously, thus cause gray scale voltage to export instantaneous short circuit, therefore described positive polarity D/A converter module and negative polarity D/A converter module adopt the mode of Non-Overlap (not overlapping) to export.
Concrete, described data drive unit also comprises data selector;
The output terminal of described positive polarity D/A converter module is connected with the first input end of described data selector;
The output terminal of described negative polarity D/A converter module is connected with the second input end of described data selector;
The output terminal of described data selector is connected with described data line;
Namely it is not overlapping that the source electrode drive circuit described in the embodiment of the present invention adopts data selector to realize output.
According to a specific embodiment, source electrode drive circuit of the present invention is described below:
As shown in Figure 2, a specific embodiment of source electrode drive circuit of the present invention comprises provides the first data drive unit 21 of gray scale voltage for first row data line and provides the second data drive unit 22 of gray scale voltage for secondary series data line;
Described first data drive unit 21 comprises the first positive polarity D/A converter module PDAC1, the first negative polarity D/A converter module NDAC1, the first data selector MUX1, the first operational amplifier 211 and the second operational amplifier 212;
Described second data drive unit 22 comprises the second positive polarity D/A converter module PDAC2, the second negative polarity D/A converter module NDAC2, the second data selector MUX2, the 3rd operational amplifier 221 and four-operational amplifier 222;
Described first positive polarity D/A converter module PDAC1 is connected with the normal phase input end of described first operational amplifier 211 by described first data selector MUX1, and described first negative polarity D/A converter module NDAC1 is connected with the normal phase input end of described second operational amplifier 212 by described first data selector MUX1;
The negative-phase input of described first operational amplifier 211 is connected with the output terminal of described first operational amplifier 211;
The negative-phase input of described second operational amplifier 212 is connected with the output terminal of described second operational amplifier 212;
Second positive polarity D/A converter module PDAC2 is connected with the first input end of described second data selector MUX2;
Second negative polarity D/A converter module NDAC2 is connected with second input end of described second data selector MUX2;
The inverting input of described 3rd operational amplifier 221 is connected with the output terminal of described 3rd operational amplifier 221;
The inverting input of described four-operational amplifier 222 is connected with the output terminal of described four-operational amplifier 222;
This specific embodiment of source electrode drive circuit of the present invention also comprises control module switching time, for controlling as adjacent column data line provides two data drive unit timesharing of gray scale voltage to export gray scale voltage;
Described switching time, control module comprised the first buffer circuit 201 and the second buffer circuit 202;
Described first buffer circuit 201 comprises the first phase inverter I1 and the second phase inverter I2 of series connection, and described first buffer circuit 201 is connected between first output terminal of described second data selector MUX1 and the normal phase input end of described 3rd operational amplifier 221;
Described second buffer circuit 202 comprises the 3rd phase inverter I3 and the 4th phase inverter I4 of series connection, between the second output terminal that described second buffer circuit 202 is connected to described second data selector MUX1 and the normal phase input end of described four-operational amplifier 222;
In figure 3, what G1 indicated is the sequential chart not adopting the gray scale voltage that the 3rd operational amplifier 221 exports before the first buffer circuit 201, what G1 ' indicated is have employed the first buffer circuit 201 after the sequential chart of gray scale voltage that exports of the 3rd operational amplifier 221, compared with G1, G1 ' is delayed a phase differential backward;
What G2 indicated is the sequential chart not adopting the gray scale voltage that four-operational amplifier 222 exports before the second buffer circuit 202, what G1 ' indicated is have employed the second buffer circuit 202 after the sequential chart of gray scale voltage that exports of four-operational amplifier 222, compared with G2, G2 ' is also delayed a phase differential backward;
This specific embodiment of source electrode drive circuit of the present invention is owing to have employed the first buffer circuit 201 and the second buffer circuit 202, achieve as the timesharing of adjacent column data line exports gray scale voltage, to avoid the Crosstalk of gray scale voltage between adjacent column data line (crosstalk) phenomenon on the impact of picture quality;
Further, this specific embodiment of source electrode drive circuit of the present invention is owing to have employed MUX1 and MUX2, and the mode achieving positive polarity D/A converter module and negative polarity D/A converter module employing Non-Overlap (not overlapping) exports.
Source driving method described in the embodiment of the present invention comprises:
Switching time, control module controlled to provide two data drive unit of gray scale voltage to export gray scale voltage in timesharing for adjacent column data line.
Concrete, the positive polarity D/A converter module providing the data drive unit of gray scale voltage to comprise for data line and the timesharing of negative polarity D/A converter module export described data line to.
Display device described in the embodiment of the present invention comprises above-mentioned source electrode drive circuit.
This display device can be the display device such as liquid crystal display, LCD TV, OLED (Organic Light-EmittingDiode, organic electroluminescent LED) display panel, OLED display, OLED TV or Electronic Paper.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a source electrode drive circuit, comprises and is respectively multiple data drive unit that multiple data line provides gray scale voltage; It is characterized in that, described source electrode drive circuit also comprises:
Switching time control module, for control for adjacent column data line provide gray scale voltage two data drive unit timesharing export gray scale voltages.
2. source electrode drive circuit as claimed in claim 1, it is characterized in that, described data drive unit comprises positive polarity D/A converter module and negative polarity D/A converter module; According to digital pixel data, positive polarity D/A converter module or described negative polarity D/A converter module export corresponding positive gray scale voltage or negative gray scale voltage.
3. source electrode drive circuit as claimed in claim 2, it is characterized in that, the positive polarity D/A converter module that described data drive unit comprises and the timesharing of negative polarity D/A converter module export described data line to.
4. source electrode drive circuit as claimed in claim 3, it is characterized in that, described data drive unit also comprises data selector;
The output terminal of described positive polarity D/A converter module is connected with the first input end of described data selector;
The output terminal of described negative polarity D/A converter module is connected with the second input end of described data selector;
The output terminal of described data selector is connected with described data line.
5. a source driving method, is characterized in that, comprising:
Switching time, control module controlled to provide two data drive unit of gray scale voltage to export gray scale voltage in timesharing for adjacent column data line.
6. source driving method as claimed in claim 5, it is characterized in that, the positive polarity D/A converter module providing the data drive unit of gray scale voltage to comprise for data line and the timesharing of negative polarity D/A converter module export described data line to.
7. a display device, comprises the source electrode drive circuit as described in claim arbitrary 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510165970.1A CN104732944B (en) | 2015-04-09 | 2015-04-09 | Source electrode drive circuit, source driving method and display device |
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| CN104732944A true CN104732944A (en) | 2015-06-24 |
| CN104732944B CN104732944B (en) | 2018-02-13 |
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Cited By (9)
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| CN106548738A (en) * | 2015-09-23 | 2017-03-29 | 矽创电子股份有限公司 | Power supply module in display system, related driving device and power supply method |
| CN107578740A (en) * | 2017-09-26 | 2018-01-12 | 北京集创北方科技股份有限公司 | Display device, source electrode drive circuit and display system |
| CN108154857A (en) * | 2017-12-29 | 2018-06-12 | 深圳市华星光电半导体显示技术有限公司 | Gamma reference voltage generation circuit, the driving circuit of liquid crystal display panel and method |
| 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 |
| CN110930939A (en) * | 2019-12-27 | 2020-03-27 | 深圳市明微电子股份有限公司 | Display screen output port crosstalk prevention method and device |
| CN112927660A (en) * | 2021-02-09 | 2021-06-08 | 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 |
| WO2023172502A1 (en) * | 2022-03-07 | 2023-09-14 | Hyphy Usa Inc. | Spread-spectrum video transport source driver integration with display panel |
| US12112718B2 (en) | 2021-09-03 | 2024-10-08 | Hyphy Usa Inc. | Analog video transport integration with display drivers |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107578740A (en) * | 2017-09-26 | 2018-01-12 | 北京集创北方科技股份有限公司 | Display device, source electrode drive circuit and display system |
| 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 |
| CN108154857A (en) * | 2017-12-29 | 2018-06-12 | 深圳市华星光电半导体显示技术有限公司 | Gamma reference voltage generation circuit, the driving circuit of liquid crystal display panel and method |
| 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 |
| CN110930939A (en) * | 2019-12-27 | 2020-03-27 | 深圳市明微电子股份有限公司 | Display screen output port crosstalk prevention method and 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 |
| WO2021129412A1 (en) * | 2019-12-27 | 2021-07-01 | 深圳市明微电子股份有限公司 | Display screen output port anti-crosstalk method and apparatus |
| CN112927660A (en) * | 2021-02-09 | 2021-06-08 | 重庆京东方光电科技有限公司 | Driving circuit, driving method thereof and display panel |
| 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 |
| US12112718B2 (en) | 2021-09-03 | 2024-10-08 | Hyphy Usa Inc. | Analog video transport integration with display drivers |
| WO2023172502A1 (en) * | 2022-03-07 | 2023-09-14 | Hyphy Usa Inc. | Spread-spectrum video transport source driver integration with display panel |
| US11842671B2 (en) | 2022-03-07 | 2023-12-12 | Hyphy Usa Inc. | Spread-spectrum video transport source driver integration with display panel |
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