CN100498439C - LCD device driving system - Google Patents
LCD device driving system Download PDFInfo
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- CN100498439C CN100498439C CNB2006100619479A CN200610061947A CN100498439C CN 100498439 C CN100498439 C CN 100498439C CN B2006100619479 A CNB2006100619479 A CN B2006100619479A CN 200610061947 A CN200610061947 A CN 200610061947A CN 100498439 C CN100498439 C CN 100498439C
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Abstract
The present invention provides a driving system for a liquid crystal display device, and comprises a control circuit and a driving circuit for a liquid crystal display module. The control circuit comprises a decoding integrated circuit and a sequential control circuit, and the driving circuit for the liquid crystal display module comprises a scanning driving integrated circuit and an active driving integrated circuit, wherein the decoding integrated circuit comprises a DC conversion circuit, the scanning driving integrated circuit comprises a pulse duration modulated circuit, and the active driving integrated circuit comprises a gamma circuit. The DC conversion circuit receives the DC voltage provided by an external power supply, and converts the DC voltage into a needed working voltage for the decoding integrated circuit, the sequential control circuit, the scanning driving integrated circuit and the active driving integrated circuit, and the working voltage is correspondingly provided for the circuits.
Description
Technical field
The invention relates to a kind of drive system, especially about a kind of drive system that is used for liquid crystal indicator.
Background technology
Characteristics such as liquid crystal indicator is light owing to having, thin, power saving, nowadays be widely used in PC, notebook computer, personal digital assistant (Personal DigitalAssistant, PDA), in portable phone, TV and multiple office automation and the audio-visual equipment.
Liquid crystal indicator mainly plays display image, and it mainly partly is a display panels.Display panels is included as realizes image scan lines displayed, data line and the organic thin film transistor array that is connected with sweep trace and data line.Display panels also comprises the scan line drive circuit (Gate Driver) of driven sweep line and the active driving circuit (Source Driver) of driving data lines.
Active driving circuit shows required gray scale voltage driving data lines by image.Scan line drive circuit is realized the on off state of sweep trace by gate operating voltage VGH (High-level Gate Voltage) and VGL (Low-level Gate Voltage).Gate operating voltage VGH is the high voltage output that makes the OTFT forward bias, i.e. forward voltage, its magnitude of voltage is generally+15.xV or+24.xV, x is any natural number.Gate operating voltage VGL is the reverse voltage output that makes the OTFT reverse biased, i.e. shutoff voltage, its magnitude of voltage be generally-10.xV or-6.xV, x is any natural number.
One sequential control circuit that is arranged on the panel external circuit control panel is connected with active driving circuit to realize the time control to scan line drive circuit and active driving circuit with scan line drive circuit respectively.Wherein, above-mentioned sequential control circuit, scan line drive circuit and active driving circuit each need provide an operating voltage could work, this operational voltage value usually+2.7V extremely+3.6V between, as+3V.
Scan drive circuit and active driving circuit are arranged in the liquid crystal panel, the various operating voltage that it is required, the timing control signal that provides by sequential control circuit is provided, all be to provide by control circuit on the external control circuit plate and power circuit, and, offer scan line drive circuit and active driving circuit via the panel cabling, so the cabling complexity by flexible circuit board arrival liquid crystal panel, cause the instability of voltage easily, picture displayed is had harmful effect.And because each voltage signal is inconsistent,, need a plurality of pins are set on flexible circuit board,, easily circuit is caused adverse effect so its number of pins is too much for avoiding each interference between signals.
Summary of the invention
In order to overcome liquid crystal indicator spread of voltage and the many problems of flexible circuit board number of pins in the prior art, the invention provides the stable and few LCD device droving system of flexible circuit board number of pins of a kind of voltage.
A kind of LCD device droving system, it comprises a control circuit and a LCD MODULE driving circuit, this control circuit comprises a decoding integrated circuit and a sequential control circuit, and this LCD MODULE driving circuit comprises an one scan drive integrated circult and an active drive integrated circult.Wherein, this decoding integrated circuit comprises stream translation circuit always, and this turntable driving integrated circuit comprises a pulse-width modulation circuit, and this active drive integrated circult comprises a gamma circuit.This DC converting circuit receives the DC voltage that external power source provides, and this DC voltage converted to is fit to the required operating voltage of this decoding integrated circuit, this sequential control circuit, this turntable driving integrated circuit and this active drive integrated circult and correspondence offers this decoding integrated circuit, this sequential control circuit, this turntable driving integrated circuit and this active drive integrated circult.
Compared to prior art, this pulse-width modulation circuit directly provides operating voltage to this turntable driving integrated circuit, and only provides operating voltage to this active drive integrated circult through short panel cabling, can improve the stability of voltage signal.In like manner gamma circuit is built in this active drive integrated circult, and the gamma electric voltage of its generation also be need not through the panel cabling so improve the stability of gamma electric voltage.In addition, the included supply voltage number of pins of flexible circuit board that connects this control circuit and this LCD MODULE driving circuit also reduces in a large number.
Description of drawings
Fig. 1 is the electrical block diagram of LCD device droving system better embodiment of the present invention.
Embodiment
Please refer to Fig. 1, it is the electrical block diagram of LCD device droving system better embodiment of the present invention.This LCD device droving system 1 comprises a control circuit 10 and a LCD MODULE driving circuit 11.This control circuit 10 comprises a decoding integrated circuit 13 and a sequential control circuit 14, and this decoding integrated circuit 13 comprises stream translation circuit 130 always.This LCD MODULE driving circuit 11 comprises an one scan drive integrated circult 15 and an active drive integrated circult 16.This turntable driving integrated circuit 15 comprises a pulse-width modulation circuit 150, and this active drive integrated circult 16 comprises a gamma circuit 160.
Wherein, this DC converting circuit 130, this pulse-width modulation circuit 150 and this gamma circuit 160 are to adopt the mode of multicore sheet encapsulation (Multiple Chips Package) to be incorporated into respectively in this decoding integrated circuit 13, this turntable driving integrated circuit 15 and this active drive integrated circult 16.
This DC converting circuit 130, pulse-width modulation circuit 150 and this gamma circuit 160 provide various operating voltage for each circuit arrangement of this LCD device droving system 1.This DC converting circuit 130 receive from the external power source input+5V～+ 12V voltage, this voltage transitions is become the required operating voltage of the active drive integrated circult of this sequential control circuit 14, this decoding integrated circuit 13, this turntable driving integrated circuit 15 and this 16, and offer foregoing circuit, this operational voltage value usually at+2.7V between+the 3.6V, as+3.3V.This pulse-width modulation circuit 150 produces gate operating voltage VGH and a VGL and a main operating voltage AVDD, this gate operating voltage VGH and VGL offer this turntable driving integrated circuit 15, and this main operating voltage AVDD provides this gamma circuit 160 and offers this active drive integrated circult 16 via this gamma circuit 160.This gamma circuit 160 produces gamma electric voltage and exports this active drive integrated circult 16 to.
This pulse-width modulation circuit 150 is incorporated among this turntable driving integrated circuit 15, the gate operating voltage VGH of its generation and VGL directly offer this turntable driving integrated circuit 15, so and need not to improve the stability of gate operating voltage VGH and VGL through the panel cabling; The main operating voltage AVDD that this pulse-width modulation circuit 150 produces also only offers this active drive integrated circult 16 through short panel cabling, improves the stability of this main operating voltage AVDD.In like manner gamma circuit 160 is built in this active drive integrated circult 16, and the gamma electric voltage of its generation also be need not through the panel cabling so improve the stability of this gamma electric voltage.
In addition, the flexible circuit board that connects control circuit and LCD MODULE driving circuit in the prior art LCD device droving system comprises 3V left and right sides operating voltage pin, the VGH pin, the VGL pin, AVDD pin and gamma electric voltage pin, and in this LCD device droving system 1, this DC converting circuit 130, this pulse-width modulation circuit 150 and this gamma circuit 160 are incorporated into this decoding integrated circuit 13 respectively, among this turntable driving integrated circuit 15 and this active drive integrated circult 16, so connecting the supply voltage number of pins that the flexible circuit board of this control circuit 10 and this LCD MODULE driving circuit 11 comprises reduces in a large number, only need the pin of 3.3V operating voltage, for LCD MODULE driving circuit 11 provides 3.3V operating voltage.
In addition, this sequential control circuit 14 also can be incorporated among this decoding integrated circuit 13 or the active drive integrated circult.
Claims (10)
1. LCD device droving system, it comprises a control circuit and a LCD MODULE driving circuit, this control circuit comprises a decoding integrated circuit and a sequential control circuit, this LCD MODULE driving circuit comprises an one scan drive integrated circult and an active drive integrated circult, it is characterized in that: this decoding integrated circuit comprises stream translation circuit always, this turntable driving integrated circuit comprises a pulse-width modulation circuit, this active drive integrated circult comprises a gamma circuit, this DC converting circuit receives the DC voltage that external power source provides, and converts this DC voltage to suitable this decoding integrated circuit, this sequential control circuit, operating voltage and correspondence that this turntable driving integrated circuit and this active drive integrated circult are required offer this decoding integrated circuit, this sequential control circuit, this turntable driving integrated circuit and this active drive integrated circult.
2. LCD device droving system as claimed in claim 1 is characterized in that: this pulse-width modulation circuit provides gate operating voltage VGH and VGL for this turntable driving integrated circuit.
3. LCD device droving system as claimed in claim 1 is characterized in that: this pulse-width modulation circuit provides main operating voltage AVDD for this gamma circuit.
4. LCD device droving system as claimed in claim 1 is characterized in that: this pulse-width modulation circuit provides main operating voltage AVDD via this gamma circuit for this active drive integrated circult.
5. LCD device droving system as claimed in claim 1 is characterized in that: this DC converting circuit is integrated in this decoding integrated circuit.
6. LCD device droving system as claimed in claim 5 is characterized in that: this DC converting circuit is to adopt the mode of multicore sheet encapsulation to be incorporated in this decoding integrated circuit.
7. LCD device droving system as claimed in claim 1 is characterized in that: this pulse-width modulation circuit is integrated in this turntable driving integrated circuit.
8. LCD device droving system as claimed in claim 7 is characterized in that: this pulse-width modulation circuit is to adopt the mode of multicore sheet encapsulation to be incorporated in this turntable driving integrated circuit.
9. LCD device droving system as claimed in claim 1 is characterized in that: this gamma circuit is integrated in this active drive integrated circult.
10. LCD device droving system as claimed in claim 9 is characterized in that: this gamma circuit is to adopt the mode of multicore sheet encapsulation to be incorporated in this active drive integrated circult.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100619479A CN100498439C (en) | 2006-08-02 | 2006-08-02 | LCD device driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100619479A CN100498439C (en) | 2006-08-02 | 2006-08-02 | LCD device driving system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101118322A CN101118322A (en) | 2008-02-06 |
| CN100498439C true CN100498439C (en) | 2009-06-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100619479A Expired - Fee Related CN100498439C (en) | 2006-08-02 | 2006-08-02 | LCD device driving system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100498439C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104460930B (en) * | 2014-12-31 | 2017-06-13 | 广东威创视讯科技股份有限公司 | ATX reference power supplies realize device |
| CN107068099A (en) * | 2017-05-19 | 2017-08-18 | 深圳市华星光电技术有限公司 | Display panel and display device |
| US10748468B2 (en) | 2017-05-19 | 2020-08-18 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Display panel and display device |
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2006
- 2006-08-02 CN CNB2006100619479A patent/CN100498439C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101118322A (en) | 2008-02-06 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090610 Termination date: 20170802 |