CN100437727C - Liquid crystal display device and its drive method - Google Patents
Liquid crystal display device and its drive method Download PDFInfo
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- CN100437727C CN100437727C CNB2005100352232A CN200510035223A CN100437727C CN 100437727 C CN100437727 C CN 100437727C CN B2005100352232 A CNB2005100352232 A CN B2005100352232A CN 200510035223 A CN200510035223 A CN 200510035223A CN 100437727 C CN100437727 C CN 100437727C
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Abstract
The present invention provides a liquid crystal display drive circuit which comprises a driving IC, a power source supplying device and a data and control signal supplying device, wherein the power source supplying device provides voltage for the driving IC, and the data and control signal supplying device provides control signals for the driving IC, liquid crystal panel driving signals and background light source driving signals; the output signals of the driving IC respectively control the display images of a liquid crystal panel and the light of a backlight source, and the liquid crystal panel and the backlight source are connected with the liquid crystal display drive circuit. The present invention also provides a liquid crystal display using the drive circuit. The drive circuit of the present invention having few elements can save production cost.
Description
[technical field]
The invention relates to a kind of LCD and driving circuit thereof, particularly about a kind of LCD and driving circuit thereof of integrating backlight source driving circuit.
[background technology]
Because LCD (Liqui d Crystal Display, LCD) liquid crystal in the panel itself is not had a characteristics of luminescence, for reaching display effect, need to give the LCD panel that one light supply apparatus is provided, its function is to supply briliancy area source adequately and uniformly to panel of LCD.Backlight driver integrated circuit (Integrated Circuit need arrange in pairs or groups when backlight of LCD is the brightness stability of pursuit backlight and the backlight that comprises time screen at present, and backlight driver IC and panel of LCD drive IC constitute liquid crystal display drive circuit jointly IC).
Please refer to Fig. 1, is a kind of LCD planar structure synoptic diagram of prior art.This LCD 10 comprises a panel of LCD 200, a backlight 300 and a liquid crystal display drive circuit 100.This panel of LCD 200 comprises a viewing area 220.This liquid crystal display drive circuit 100 comprises that a power supply generator 120, is used to control data and control signal generator 140, backlight driver IC 160 and the panel driving IC 180 of panel of LCD 200 and backlight 300.This panel driving IC 180 is positioned on the periphery of this panel of LCD 200, is used for driving this panel of LCD 200 and making viewing area 220 display images under the operation of this power supply generator 120 and these data and control signal generator 140.This backlight driver IC 160 is this backlight 300 of driving under the operation of power supply generator 120 and these data and control signal generator 140, and it is luminous to make this backlight 300.
Please refer to Fig. 2, is the planar structure synoptic diagram of panel driving IC 180 among Fig. 1.Data and control signal generator 140 offer panel of LCD system interface 181 with control signal, signal and source signal, the operation of this control signal control entire circuit.This signal inputs to mu balanced circuit 186, panel of LCD voltage-multiplying circuit 185 and gate drivers 184 by system interface 181, supply voltage inputs to panel of LCD voltage-multiplying circuit 185 by power supply generator 120, and the voltage through amplifying offers mu balanced circuit 186 and gate drivers 184 respectively; Voltage by mu balanced circuit 186 outputs offers gate drivers 184, latch cicuit 182, gamma adjustment circuit and gray scale voltage generation circuit 187 and source electrode driver 183; Offer viewing area 220 among Fig. 1 through the gate drive signal of gate drivers 184 output.This source signal inputs to mu balanced circuit 186, gamma adjustment circuit and gray scale voltage generation circuit 187 and latch cicuit 182 by system interface 181, the voltage that source signal through latching and gamma are adjusted circuit and gray scale voltage generation circuit 187 outputs offers source electrode driver 183, offer viewing area 220 among Fig. 1 through the source drive signal of source electrode driver 183 output, make its display image.
Please refer to Fig. 3, is the planar structure synoptic diagram of backlight driver IC 160 among Fig. 1.Data and control signal generator 140 offer back light source system interface 161 with control signal and data, offer backlight driver voltage-multiplying circuit 162 and D/A conversion circuit 163 after its output.The voltage-multiplying circuit 162 that links to each other with power supply 120 offers D/A conversion circuit 163 with the voltage that amplifies, and the analog voltage signal of exporting through D/A conversion circuit 163 offers backlight 300.
Above-mentioned backlight driver IC 160 and panel driving IC 180 have separately independently voltage-multiplying circuit and data and control signal generator respectively, so this kind driving circuit wire laying mode complexity, increase the space of the cost and the LCD module of peripheral part.
[summary of the invention]
In order to overcome liquid crystal display drive circuit wire laying mode complexity and the high shortcoming of peripheral cost of parts in the prior art, be necessary to provide a kind of driving circuit wire laying mode simple and the liquid crystal display drive circuit of the peripheral cost of parts of reduction and the LCD of this driving circuit of employing.
The disclosed technical scheme that solves this technical problem of one better embodiment provides a kind of liquid crystal display drive circuit, it comprises a drive IC, a power supply generator and data and control signal generator, and this power supply generator provides voltage to this drive IC; These data and control signal generator provide control signal and liquid crystal panel drive signal and backlight driving signal to this drive IC; It is luminous that this drive IC output signal is controlled the liquid crystal panel display image and the backlight that are connected with this liquid crystal display drive circuit respectively.This drive IC comprises a system interface, one gate drivers, one D/A conversion circuit, one voltage-multiplying circuit and a mu balanced circuit, this system interface reception is provided for the signal and the backlight drive signal that is used to drive backlight of driving grid driver from data and control signal generator, this voltage-multiplying circuit receives the voltage that this power supply generator provides, this mu balanced circuit receives the voltage of voltage-multiplying circuit and exports gate drivers to and D/A conversion circuit, the signal of this gate drivers output is used to control liquid crystal panel, and the analog voltage signal of this D/A conversion circuit output offers backlight.
The disclosed a kind of LCD of another better embodiment, it comprises: a panel of LCD, a backlight and a liquid crystal display drive circuit, wherein: this liquid crystal display drive circuit comprises a drive IC, a power supply generator and data and control signal generator, and this power supply generator provides voltage to this drive IC; These data and control signal generator provide control signal and liquid crystal panel drive signal and backlight driving signal to this drive IC; It is luminous that this drive IC output signal is controlled the liquid crystal panel display image and the backlight that are connected with this liquid crystal display drive circuit respectively, and this backlight is a light emitting diode.This drive IC comprises a system interface, one gate drivers, one D/A conversion circuit, one voltage-multiplying circuit and a mu balanced circuit, this system interface reception is provided for the signal and the backlight drive signal that is used to drive backlight of driving grid driver from data and control signal generator, this voltage-multiplying circuit receives the voltage that this power supply generator provides, this mu balanced circuit receives the voltage of voltage-multiplying circuit and exports gate drivers to and D/A conversion circuit, the signal of this gate drivers output is used to control liquid crystal panel, and the analog voltage signal of this D/A conversion circuit output offers backlight.
Compared to prior art, above-mentioned liquid crystal display drive circuit combines display panel drive IC and backlight driver IC, can realize driving display panels and backlight, therefore the required electronic component of liquid crystal display drive circuit is few than prior art, thereby can reduce the production cost of LCD.
[description of drawings]
Fig. 1 is the LCD planar structure synoptic diagram of prior art.
Fig. 2 is a liquid crystal display drive circuit circuit planar structure synoptic diagram among Fig. 1.
Fig. 3 is the circuit planar structure synoptic diagram of backlight driver IC among Fig. 1.
Fig. 4 is a kind of LCD planar structure synoptic diagram of better embodiment.
Fig. 5 is a liquid crystal display drive circuit planar structure synoptic diagram among Fig. 4.
[embodiment]
Please refer to Fig. 4, is a kind of LCD planar structure synoptic diagram of better embodiment.This LCD 1 comprises a panel of LCD 400, a backlight 500 and a liquid crystal display drive circuit 600.This liquid crystal display drive circuit 600 comprises that a drive IC 660, that is used to drive panel of LCD 400 and backlight 500 is used to control data and the control signal generator 640 and a power supply generator 620 of panel of LCD 400 and backlight 500.This panel of LCD 400 comprises a viewing area 420.This drive IC 660 is positioned on the periphery of this panel of LCD 400.
Please refer to Fig. 5, is the planar structure synoptic diagram of liquid crystal display drive circuit 600 among Fig. 4.Data and control signal generator 640 offer the system interface 661 of panel of LCD and backlight with the data signal of control signal, signal, source signal and driving backlight, the operation of this control signal control entire circuit.
This signal inputs to the voltage-multiplying circuit 665 and gate drivers 664 of mu balanced circuit 666, panel of LCD and backlight by the system interface 661 of panel of LCD and backlight.Supply voltage inputs to voltage-multiplying circuit 665 by voltage generator 620, and the voltage through amplifying offers mu balanced circuit 666 and gate drivers 664 respectively; Voltage by mu balanced circuit 666 outputs offers gate drivers 664, latch cicuit 662, gamma adjustment circuit and gray scale voltage generation circuit 667 and source electrode driver 663.Gate drive signal through gate drivers 664 outputs offers the viewing area 420 shown in Fig. 4.
This source signal inputs to mu balanced circuit 666, gamma adjustment circuit and gray scale voltage generation circuit 667 and latch cicuit 662 by system interface 661, the voltage that source signal through latching and gamma are adjusted circuit and gray scale voltage generation circuit 667 outputs offers source electrode driver 663, source drive signal through source electrode driver 663 outputs offers the viewing area 420 shown in Fig. 4, makes its display image.
The data signal of this driving backlight offers voltage-multiplying circuit 665 and D/A conversion circuit 668 after exporting by system interface 661, voltage-multiplying circuit 665 offers D/A conversion circuit 668 with the voltage that amplifies by mu balanced circuit 666, and the analog voltage signal of exporting through D/A conversion circuit 668 offers backlight 500.
Backlight 500 can be a light emitting diode, also can be other light source.
In the liquid crystal display drive circuit 600 of the present invention, panel of LCD drive IC and backlight driver IC are integrated into a drive IC 660, only need a system interface 661, voltage-multiplying circuit 665 and data and control signal generator 640 can realize driving panel of LCD and backlight.Therefore this kind wire laying mode is simple than prior art, reduce peripheral part cost, reduce the space of LCD module, therefore can reduce production costs.
Claims (4)
1. a liquid crystal display drive circuit comprises: a drive IC, a power supply generator and data and control signal generator, and this power supply generator provides voltage to this drive IC; These data and control signal generator provide control signal and liquid crystal panel drive signal and backlight driving signal to this drive IC; It is luminous that this drive IC output signal is controlled the liquid crystal panel display image and the backlight that are connected with this liquid crystal display drive circuit respectively, this drive IC comprises a system interface, one gate drivers, one D/A conversion circuit, one voltage-multiplying circuit and a mu balanced circuit, this system interface reception is provided for the signal and the backlight drive signal that is used to drive backlight of driving grid driver from data and control signal generator, this voltage-multiplying circuit receives the voltage that this power supply generator provides, this mu balanced circuit receives the voltage of voltage-multiplying circuit and exports gate drivers to and D/A conversion circuit, the signal of this gate drivers output is used to control liquid crystal panel, and the analog voltage signal of this D/A conversion circuit output offers backlight.
2. liquid crystal display drive circuit as claimed in claim 1, it is characterized in that: this drive IC further comprises a source electrode driver that links to each other with this mu balanced circuit, one gamma that is connected with this source electrode driver is adjusted circuit and gray scale voltage generation circuit, one latch cicuit that is connected with this source electrode driver, this gamma adjustment circuit links to each other with mu balanced circuit respectively with this latch cicuit with gray scale voltage generation circuit and the source drive signal that provides from this system interface is provided, and the signal of this source electrode driver output is used to control liquid crystal panel.
3. LCD, it comprises: a panel of LCD, a backlight and a liquid crystal display drive circuit, it is characterized in that: this liquid crystal display drive circuit comprises a drive IC, a power supply generator and data and control signal generator, and this power supply generator provides voltage to this drive IC; These data and control signal generator provide control signal and liquid crystal panel drive signal and backlight driving signal to this drive IC; It is luminous that this drive IC output signal is controlled the liquid crystal panel display image and the backlight that are connected with this liquid crystal display drive circuit respectively, this drive IC comprises a system interface, one gate drivers, one D/A conversion circuit, one voltage-multiplying circuit and a mu balanced circuit, this system interface reception is provided for the signal and the backlight drive signal that is used to drive backlight of driving grid driver from data and control signal generator, this voltage-multiplying circuit receives the voltage that this power supply generator provides, this mu balanced circuit receives the voltage of voltage-multiplying circuit and exports gate drivers to and D/A conversion circuit, the signal of this gate drivers output is used to control liquid crystal panel, and the analog voltage signal of this D/A conversion circuit output offers backlight.
4. LCD as claimed in claim 3, it is characterized in that: this drive IC comprises a source electrode driver that links to each other with this mu balanced circuit, one gamma that is connected with this source electrode driver is adjusted circuit and gray scale voltage generation circuit, one latch cicuit that is connected with this source electrode driver, this gamma adjustment circuit links to each other with mu balanced circuit respectively with this latch cicuit with gray scale voltage generation circuit and the source drive signal that provides from this system interface is provided, and the signal of this source electrode driver output is used to control liquid crystal panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100352232A CN100437727C (en) | 2005-06-08 | 2005-06-08 | Liquid crystal display device and its drive method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100352232A CN100437727C (en) | 2005-06-08 | 2005-06-08 | Liquid crystal display device and its drive method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1877682A CN1877682A (en) | 2006-12-13 |
| CN100437727C true CN100437727C (en) | 2008-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100352232A Expired - Fee Related CN100437727C (en) | 2005-06-08 | 2005-06-08 | Liquid crystal display device and its drive method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180071657A (en) * | 2016-12-20 | 2018-06-28 | 엘지디스플레이 주식회사 | Display apparatus and multi screen display apparatus comprising the same |
| CN107240382A (en) | 2017-07-31 | 2017-10-10 | 武汉华星光电技术有限公司 | A kind of display module and the circuit unit for display device |
| CN110767182B (en) * | 2019-11-07 | 2021-06-29 | 上海创功通讯技术有限公司 | Screen display control system and screen display control method |
| CN111554240B (en) | 2020-05-29 | 2022-08-16 | 上海天马微电子有限公司 | Display device driving method and display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1195785A (en) * | 1997-02-07 | 1998-10-14 | 株式会社日立制作所 | Liquid crystal display having voltage compensating function |
| CN1359098A (en) * | 2000-12-15 | 2002-07-17 | Lg.菲利浦Lcd株式会社 | LCD with gamma voltage controller |
| CN1392529A (en) * | 2001-06-15 | 2003-01-22 | 精工爱普生株式会社 | Line drive circuit, photoelectric device and display device |
| CN1609941A (en) * | 2003-10-21 | 2005-04-27 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device and driving method thereof |
-
2005
- 2005-06-08 CN CNB2005100352232A patent/CN100437727C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1195785A (en) * | 1997-02-07 | 1998-10-14 | 株式会社日立制作所 | Liquid crystal display having voltage compensating function |
| CN1359098A (en) * | 2000-12-15 | 2002-07-17 | Lg.菲利浦Lcd株式会社 | LCD with gamma voltage controller |
| CN1392529A (en) * | 2001-06-15 | 2003-01-22 | 精工爱普生株式会社 | Line drive circuit, photoelectric device and display device |
| CN1609941A (en) * | 2003-10-21 | 2005-04-27 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device and driving method thereof |
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| CN1877682A (en) | 2006-12-13 |
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