CN1294552C - Liquid crystal display and its method - Google Patents
Liquid crystal display and its method Download PDFInfo
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- CN1294552C CN1294552C CNB2004100586531A CN200410058653A CN1294552C CN 1294552 C CN1294552 C CN 1294552C CN B2004100586531 A CNB2004100586531 A CN B2004100586531A CN 200410058653 A CN200410058653 A CN 200410058653A CN 1294552 C CN1294552 C CN 1294552C
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Abstract
The present invention relates to a liquid crystal display and a method. The liquid crystal display comprises a time schedule controller, a plurality of driving chips which are connected in series, and a display panel, wherein the time schedule controller is used for outputting a picture element signal, the driving chips are used for driving the display panel so that a picture is displayed; the driving chip comprises a differential receiver, a single end receiver, a shift register, a differential output device, a single end output device and a picture element driver. The driving chip receives the picture element signal and processes the picture element signal inside, the display panel is driven, and the picture element signal is transferred to the next driving chip.
Description
Technical field
The present invention relates to a kind of LCD, and particularly relate to a kind of LCD and chip for driving thereof of tool dual transfer mode.
Background technology
Please refer to Fig. 1, it shows traditional LCD.LCD 100 comprises n chip for driving (Driver IC) 104, display panel 108, printed circuit board (PCB) 106 and the glass substrate 110 of time schedule controller (Timing controller) 102, serial connection.Placing the time schedule controller 102 on the printed circuit board (PCB) 106 is picture element signals of single-ended in order to be output as (Single-ended) form.First chip for driving 104 (1) is to electrically connect with time schedule controller 102.Chip for driving 104 (1), 104 (2), 104 (3) ... 104 (n) are serial connection.After chip for driving 104 (1) receives the picture element signal of time schedule controller 102 outputs, this pixel data is passed to chip for driving 104 (2); Chip for driving 104 (2) then sends this picture element signal to next chip for driving 104 (3), and the rest may be inferred and picture element signal is passed to last chip for driving 104 (n).The picture element signal that 104 mats of each chip for driving are captured and drive display panel 108.Each chip for driving 104 is to place on the glass substrate 110, and this kind is called WOA (Wire on glass) in the mode of glass substrate transmitting data.
Please refer to Fig. 2, it shows conventional ADS driving chip synoptic diagram.Picture element signal with single-ended format between the chip for driving 104 transmits data.Chip for driving 104 comprises single-ended receiver 111, single-ended follower 112, shift register 113 and pixel driver 114.Single-ended receiver 111 for example is a CMOS TTL circuit with single-ended follower 112.After single-ended receiver 111 receives pixel data, pass to shift register 113, and then pass to single-ended follower 112 to export to next chip for driving.Pixel driver 114 is by the data of corresponding this chip for driving of acquisition in the shift register 113, and drives display panel 108 according to this.
Yet, when picture element signal transmits with the glass substrate lead of single-ended format between chip for driving, can seriously decay because of the lead impedance causes picture element signal greatly.And for the LCD of high definition, need more chip for driving, in the time of endways signal attenuation even more serious, cause the difficulty that is applied in the high definition lcd screen.
Summary of the invention
In view of this, purpose of the present invention just provides a kind of LCD and chip for driving thereof, makes picture element signal can seriously not decay and make transfer clock to improve when transmission.
According to purpose of the present invention, a kind of LCD is proposed.LCD comprises a plurality of chip for driving and the display panel of time schedule controller, serial connection.Time schedule controller output pixel signal is to chip for driving first chip for driving wherein, first chip for driving receives picture element signal according to default receiving mode, picture element signal is passed to second chip for driving, by that analogy picture element signal is reached last chip for driving again according to default output mode.And each chip for driving drives display panel with the picture element signal of being sampled.
According to another object of the present invention, a kind of data transmission method that is used for LCD is proposed, this LCD comprises first chip for driving and second chip for driving of time schedule controller, serial connection.At first by time schedule controller output pixel signal.First chip for driving receives picture element signal according to default receiving mode then, and the acquisition picture element signal.Then, first chip for driving exports picture element signal to second chip for driving according to default output mode.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 shows the conventional liquid crystal synoptic diagram.
Fig. 2 shows conventional ADS driving chip intention.
Fig. 3 shows the liquid crystal display drive circuit synoptic diagram according to a preferred embodiment of the present invention.
Fig. 4 shows the chip for driving synoptic diagram according to a preferred embodiment of the present invention.
The reference numeral explanation
100: conventional liquid crystal driving circuit synoptic diagram
102,302: time schedule controller
106,306: printed circuit board (PCB)
104: the conventional ADS driving chip
108,308: display panel
110,310: glass substrate
300: according to the liquid crystal display drive circuit synoptic diagram of a preferred embodiment of the present invention
304: according to the chip for driving of a preferred embodiment of the present invention
402: input selector
404: differential receiver
406,111: single-ended receiver
408,113: shift register
410: differential follower
412,112: single-ended follower
414: outlet selector
416,114: pixel driver
Embodiment
Please refer to Fig. 3, it shows the liquid crystal display drive circuit synoptic diagram according to a preferred embodiment of the present invention.LCD 300 comprises n chip for driving (Driver IC) 304, display panel 308, printed circuit board (PCB) 306 and the glass substrate 310 of time schedule controller (Timing controller) 302, serial connection.Place time schedule controller 302 outputs on the printed circuit board (PCB) 306 for example to be the picture element signal of differential form.First chip for driving 304 (1) is to electrically connect with time schedule controller 302.Chip for driving 304 (1), 304 (2), 304 (3) ... 304 (n) are serial connection.Chip for driving 304 (1) on the glass substrate 310 receives the picture element signal of time schedule controller 302 outputs, again picture element signal is sent to next chip for driving 304 (2), chip for driving 304 (2) is sent to picture element signal next chip for driving 304 (3) again, and the rest may be inferred and picture element signal is passed to last chip for driving 304 (n).And can transmit picture element signal with differential form between the chip for driving 304, or with the single-ended method transmission picture element signal that replaces with differential form.The picture element signal that 304 mats of each chip for driving are captured and drive display panel 308.Glass substrate 310 is the pedestals for chip for driving 304, and this kind is called WOA (Wire on glass) in the mode of glass substrate transmitting data.
Please refer to Fig. 4, it shows the chip for driving synoptic diagram according to preferred embodiment of the present invention.Each chip for driving 304 comprises input selector 402, differential receiver 404, single-ended receiver 406, shift register 408, differential follower 410, single-ended follower 412, outlet selector 414 and pixel driver 416.
Chip for driving 304 has a default receiving mode and a default output mode, and wherein default receiving mode can be divided into differential (Differential) formula or single-ended (Single-ended) formula again, and default output mode also can be divided into differential type or monofocal.Chip for driving 304 receives picture element signal according to its default receiving mode, and according to its default output mode the output pixel signal.Input selector 402 is to export after receiving picture element signal: when input selector 402 default receiving modes are differential type, then enable differential receiver 404 to receive its picture element signal, differential receiver 404 converts internal signal output more according to this to, and the form of internal signal is to be converted to single-ended format in the present embodiment; When default receiving mode is during for monofocal, then input selector 402 enables single-ended receiver 406 to receive its picture element signal, and single-ended receiver 406 converts internal signal output more according to this to, and internal signal still is a single-ended format in the present embodiment.
The disclosed LCD of the above embodiment of the present invention is to explain to have the chip for driving that differential and single-ended output goes into pattern simultaneously, and pattern is gone in the output that right chip for driving also can only have differential type, does not repeat them here.
Though the LCD of present embodiment has adopted the transmission mode of WOA, between chip for driving, can use the picture element signal of differential form to transmit, picture element signal can seriously not decayed.Also can between chip for driving, adopt the mode of the picture element signal alternate transmission of single-ended and differential form, can have the advantage of the good signal quality of the saving power supply of single-ended signal and differential wave simultaneously.And, can reach the application on the high definition LCD easily because of having used the transmission of differential wave.
In sum; though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (12)
1. LCD comprises:
Time schedule controller is in order to export one first picture element signal; And
One first chip for driving and one second chip for driving, this first chip for driving are to electrically connect with this time schedule controller, and this second chip for driving is to electrically connect with this first chip for driving;
Wherein, this first chip for driving and this second chip for driving all have a default receiving mode and a default output mode, and this default receiving mode is to divide into differential type or monofocal, and this first default output mode is to divide into differential type or monofocal;
Wherein, this first chip for driving received this first picture element signal according to presetting receiving mode, and according to exporting one second picture element signal by default output mode;
Wherein, this second chip for driving received this second picture element signal according to presetting receiving mode, and according to exporting one the 3rd picture element signal by default output mode.
2. display as claimed in claim 1, wherein, this first chip for driving comprises:
One differential receiver;
One single-ended receiver;
One shift register, its input end electrically connects with the single-ended receiver of this differential receiver and this respectively, in order to receive one first internal signal and to keep in the back and export one second internal signal by its output terminal, wherein, when this default receiving mode is during for differential type, this first internal signal is by the output of this differential receiver, and when this receiving mode is during for monofocal, this first internal signal is by this single-ended receiver output;
One differential follower, when this default output mode is during for differential type, this differential follower receives this second internal signal and is converted to this second picture element signal output according to this; And
One single-ended follower, when this default output mode is during for monofocal, this single-ended follower receives this second internal signal and exports this second picture element signal according to this.
3. display as claimed in claim 2, wherein, this first internal signal and second internal signal are to be single-ended format.
4. display as claimed in claim 2, wherein, this first chip for driving has more an input selector, in order to receive this first picture element signal, when this default input pattern is differential type, this input selector is to export this first picture element signal to this differential receiver, and when this default input pattern was monofocal, this input selector was to export this first picture element signal to this single-ended receiver.
5. display as claimed in claim 2, wherein, this first chip for driving has more an outlet selector, when this default output mode is differential type, this outlet selector is this second picture element signal output that this differential follower is produced, when this default output mode was monofocal, this outlet selector was this second picture element signal output that this single-ended follower is produced.
6. display as claimed in claim 2, have more a display panel, this first chip for driving has more a pixel driver, in order to capture this first internal signal or this second internal signal and drive this display panel according to this with display frame from this shift register.
7. display as claimed in claim 1, wherein, this second chip for driving comprises:
One differential receiver;
One single-ended receiver;
One shift register, its input end electrically connects with the single-ended receiver of this differential receiver and this respectively, in order to receive one the 3rd internal signal and to keep in the back and export one the 4th internal signal by its output terminal, wherein, when this default receiving mode is during for differential type, the 3rd internal signal is by the output of this differential receiver, and when this default receiving mode is during for monofocal, the 4th internal signal is by this single-ended receiver output;
One differential follower, when this default output mode is during for differential type, this differential follower receives the 4th internal signal and is converted to the output of the 3rd picture element signal according to this; And
One single-ended follower, when this default output mode is during for monofocal, this single-ended follower receives the 4th internal signal and is converted to the output of the 3rd picture element signal according to this.
8. display as claimed in claim 7, wherein, the 3rd internal signal and the 4th internal signal are to be single-ended format.
9. display as claimed in claim 7, wherein, this second chip for driving has more an input selector, in order to receive this second picture element signal, when this default input pattern is differential type, this input selector is to export this second picture element signal to this differential receiver, and when this default input pattern was monofocal, this input selector was to export this second picture element signal to this single-ended receiver.
10. display as claimed in claim 7, wherein, this second chip for driving has more an outlet selector, when this default output mode is differential type, this outlet selector is the 3rd picture element signal output that this differential follower is produced, when this default output mode was monofocal, this outlet selector was the 3rd picture element signal output that this single-ended follower is produced.
11. display as claimed in claim 7, have more a display panel, this second chip for driving has more a pixel driver, in order to signal in acquisition the 3rd internal signal or the 4th from this shift register, and drives this display panel according to this with display frame.
12. data transmission method that is used for LCD, this LCD comprises one first chip for driving and one second chip for driving of time schedule controller, serial connection, this first chip for driving and this second chip for driving all have a default receiving mode and a default output mode, should default receiving mode be to be differential type or monofocal, should default output mode be to be differential type or monofocal, this first chip for driving is to electrically connect with this time schedule controller, and this method comprises:
Export one first picture element signal by this time schedule controller;
This first chip for driving received and temporary this first picture element signal according to should the presetting receiving mode of this first chip for driving correspondence;
This first chip for driving was exported one second picture element signal to this second chip for driving according to should the presetting output mode of this first chip for driving correspondence;
This second chip for driving received this second picture element signal according to should the presetting receiving mode of this second chip for driving correspondence; And
This second chip for driving was exported one the 3rd picture element signal according to should the presetting output mode of this second chip for driving correspondence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100586531A CN1294552C (en) | 2004-07-27 | 2004-07-27 | Liquid crystal display and its method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100586531A CN1294552C (en) | 2004-07-27 | 2004-07-27 | Liquid crystal display and its method |
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| CN1588185A CN1588185A (en) | 2005-03-02 |
| CN1294552C true CN1294552C (en) | 2007-01-10 |
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| CNB2004100586531A Expired - Fee Related CN1294552C (en) | 2004-07-27 | 2004-07-27 | Liquid crystal display and its method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100446075C (en) * | 2005-05-26 | 2008-12-24 | 凌阳科技股份有限公司 | Time sequence controller and source driver of liquid crystal panel and control method and circuit |
| CN1916715B (en) * | 2005-08-19 | 2010-06-09 | 奇美电子股份有限公司 | Liquid crystal display faceplate |
| TWI439898B (en) * | 2011-02-10 | 2014-06-01 | Raydium Semiconductor Corp | Touch sensing apparatus |
| CN114758610A (en) * | 2020-12-28 | 2022-07-15 | 矽创电子股份有限公司 | Driving structure of display panel |
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| US5724060A (en) * | 1993-02-15 | 1998-03-03 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Multiplex addressing of ferro-electric liquid crystal displays |
| US6384805B1 (en) * | 1998-10-06 | 2002-05-07 | International Business Machines Corporation | Output level averaging circuit for LCD source driver |
| JP2002261843A (en) * | 2001-03-02 | 2002-09-13 | Ricoh Co Ltd | Differential signal transmission circuit |
| CN1385829A (en) * | 2001-05-11 | 2002-12-18 | 精工爱普生株式会社 | Display controller, display device and electronic equipment |
| CN1402425A (en) * | 2001-08-24 | 2003-03-12 | 株式会社东芝 | Differential amplifying circuit and semiconductor integrated circuit for driving liquid crystal display device |
| CN1412739A (en) * | 2001-09-27 | 2003-04-23 | 三星电子株式会社 | Liquid crystal display |
| US6567066B1 (en) * | 1999-02-16 | 2003-05-20 | Nec Corporation | Driving circuit of display device |
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| JP2003330423A (en) * | 2002-05-09 | 2003-11-19 | Casio Comput Co Ltd | Liquid crystal display device and its driving control method |
| CN1477422A (en) * | 2002-08-23 | 2004-02-25 | 友达光电股份有限公司 | Liquid crystal display device |
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2004
- 2004-07-27 CN CNB2004100586531A patent/CN1294552C/en not_active Expired - Fee Related
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5381063A (en) * | 1992-11-13 | 1995-01-10 | Medtronic, Inc. | AC offset compensation for active LCD drivers |
| US5724060A (en) * | 1993-02-15 | 1998-03-03 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Multiplex addressing of ferro-electric liquid crystal displays |
| US6384805B1 (en) * | 1998-10-06 | 2002-05-07 | International Business Machines Corporation | Output level averaging circuit for LCD source driver |
| US6567066B1 (en) * | 1999-02-16 | 2003-05-20 | Nec Corporation | Driving circuit of display device |
| CN1422422A (en) * | 2000-11-30 | 2003-06-04 | 汤姆森许可公司 | Drive circuit for improved brightness control in liquid crystal displays and method therefor |
| JP2002261843A (en) * | 2001-03-02 | 2002-09-13 | Ricoh Co Ltd | Differential signal transmission circuit |
| CN1385829A (en) * | 2001-05-11 | 2002-12-18 | 精工爱普生株式会社 | Display controller, display device and electronic equipment |
| CN1402425A (en) * | 2001-08-24 | 2003-03-12 | 株式会社东芝 | Differential amplifying circuit and semiconductor integrated circuit for driving liquid crystal display device |
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| CN1588185A (en) | 2005-03-02 |
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