CN104123920A - Liquid crystal display device and grid electrode driver thereof - Google Patents
Liquid crystal display device and grid electrode driver thereof Download PDFInfo
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- CN104123920A CN104123920A CN201310320513.6A CN201310320513A CN104123920A CN 104123920 A CN104123920 A CN 104123920A CN 201310320513 A CN201310320513 A CN 201310320513A CN 104123920 A CN104123920 A CN 104123920A
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- sweep signal
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Abstract
The invention relates to a liquid crystal display device. The device comprises a grid electrode driver, a data driver and a display panel; the grid electrode driver outputs a scanning signal to control the connection and disconnection state of a thin-film transistor array of the liquid crystal display panel; the data driver outputs a data signal to control the change of the display pictures of the liquid crystal display panel; the grid electrode driver comprises a scanning signal production unit and buffer unit, wherein the scanning signal production unit is used for producing a scanning signal according to a clock signal and initial pulse and outputting the scanning signal through a plurality of output channels; the digital buffer unit is used for amplifying the scanning signal that is to be remotely transmitted to the display panel by preset times.
Description
Technical field
The present invention relates to a kind of liquid crystal indicator and gate drivers thereof.
Background technology
Liquid crystal display (Liquid Crystal Display; LCD) be now widely used a kind of flat-panel screens, it has, and profile is frivolous, power saving and the advantage such as radiationless.The principle of work of liquid crystal display is to utilize the ordered state that changes the voltage difference at liquid crystal layer two ends and change the liquid crystal molecule in liquid crystal layer, in order to change the light transmission of liquid crystal layer, then coordinates light source that backlight module provides to show image.Generally speaking, liquid crystal display comprises multiple pixel cells, source electrode driver and gate drivers.The distance difference that arrives display panel through fanout area due to each output channel cabling of gate drivers causes cabling resistance differences.In general, the cabling resistance of close gate drivers is compared with little and larger away from the cabling resistance of gate drivers.Thereby the sweep signal that each output channel is exported thus also can there are differences and cause image to show inhomogeneous (Mura), affects image displaying quality.
Summary of the invention
In view of above content, be necessary to provide a kind of image that improves to show inhomogeneous liquid crystal indicator and gate drivers thereof.
A kind of liquid crystal indicator, it comprises gate drivers, data driver and display panel.This gate drivers output scanning signal is to control conducting and the cut-off state of thin film transistor (TFT) array of this display panels, this this display panels display variation of data driver outputting data signals control.Wherein, this gate drivers comprise sweep signal generation unit and with digital buffer cell.This sweep signal generation unit is for according to the generation of clock signal and initial pulse and through sequentially output scanning signal of multiple output channels.This numeral buffer cell need carry out through long-distance transmissions the amplification processing of a prearranged multiple to the sweep signal of display panel.
A kind of gate drivers, it comprise sweep signal generation unit and with digital buffer cell.This sweep signal generation unit is for according to the generation of clock signal and initial pulse and through sequentially output scanning signal of multiple output channels.This numeral buffer cell need carry out through long-distance transmissions the amplification processing of a prearranged multiple to the sweep signal of display panel.
Compared to prior art, thereby the gate drivers in liquid crystal indicator of the present invention by inner digital buffer cell need through long-distance transmissions to the sweep signal of display panel carry out a prearranged multiple amplification process can effectively offset the signal attenuation that cabling causes, use in reduction prior art and show non-uniform phenomenon, thereby promote the image displaying quality of display panel.
Brief description of the drawings
Fig. 1 is the module diagram of liquid crystal indicator one preferred embodiments of the present invention.
Fig. 2 is the gate drivers schematic diagram of the liquid crystal indicator shown in Fig. 1.
Fig. 3 is the digital buffer cell schematic diagram of the gate drivers shown in Fig. 2.
Main element symbol description
| Liquid crystal indicator | 10 |
| Gate drivers | 12 |
| Data driver | 14 |
| Display panel | 16 |
| Viewing area | 161 |
| Fan-out region | 163 |
| Cabling | 17 |
| Sweep signal generation unit | 122 |
| Numeral buffer cell | 124 |
| Buffer amplifier | 126 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, Fig. 1 is liquid crystal indicator one preferred embodiments schematic diagram of the present invention.This liquid crystal indicator 10 comprises gate drivers 12, data driver 14 and display panel 16.These gate drivers 12 output scanning signals are to control conducting and the cut-off state of thin film transistor (TFT) array of this display panels 16, these these display panels 16 display variation of data driver 14 outputting data signals controls.This display panel 16 comprises viewing area 161 and is arranged at the fan-out region 163 of these viewing area 161 peripheries.This gate drivers 12 and this data driver 16 are all arranged at this fan-out region 163.This gate drivers 12 and this data driver 14 are all arranged on the glass substrate of this display panel 16.
This gate drivers 12 is connected with the sweep trace of viewing area 161 through cabling 17, and this source electrode driver 14 is connected with the data line of viewing area 161 through cabling 17.This cabling 17 is arranged at this fan-out region 163.
See also Fig. 2, Fig. 2 is gate drivers 12 schematic diagram shown in Fig. 1.This gate drivers 12 comprises sweep signal generation unit 122 and digital buffer cell 124.This sweep signal generation unit 122 comprises multiple output channel Vo1, Vo2, Vo3 ... Vo2n (n is natural number).This sweep signal generation unit 122 produces multiple sweep signal G1, G2, G3 according to clock signal CKV and initial pulse STV ... G2n is also sequentially respectively through the plurality of output channel Vo1, Vo2, Vo3 ... Vo2n output.This numeral buffer cell 124 comprises multiple digit buffer B1, B2, B3 ... B2n.One end of this each digit buffer is connected with an output channel, and the other end of this each digit buffer is connected with viewing area 161 through cabling 17.
In the present embodiment, cabling 17 length between this digit buffer Bn and this viewing area 161 are the shortest, i.e. the impedance minimum of this cabling 17.Cabling 17 between this digit buffer B1, B2n and this viewing area 161 is equal in length and its length is long compared with other cabling 17 length, i.e. cabling 17 impedances between this digit buffer B1, B2n and this viewing area 161 equate and its impedance large compared with the impedance of other cablings 17.
See also Fig. 2, Fig. 2 is the digit buffer module diagram of the liquid crystal indicator 10 shown in Fig. 1.This each digit buffer comprises the buffer amplifier 126 that quantity is different, and the quantity of this buffer amplifier 126, according to walking the sweep signal attenuation degree setting that line impedence causes, utilizes buffer amplifier 126 amplitude of sweep signal to be carried out to the amplification of different progression.Particularly, this digit buffer Bn does not amplify sweep signal Gn, and other digit buffers carry out the amplification of different progression according to a prearranged multiple to the amplitude of sweep signal, and the number of stages of amplification of this digit buffer B1, B2n is the highest.
In the present embodiment, first judge the attenuation degree of sweep signal according to walking line impedence, then set required number of stages of amplification according to attenuation degree and the buffer amplifier 126 of respective numbers is set in digit buffer.In the present embodiment, the enlargement factor of each buffer amplifier 126 is identical, in the time that sweep signal is amplified different multiples by needs, the buffer amplifier of respective numbers is set.
In other embodiments, this each digit buffer only comprises a buffer amplifier 126, and the multiple of this buffer amplifier 126 is adjustable, by regulating the enlargement factor of this buffer amplifier 126, can realize the amplification to sweep signal.
The content disclosing based on above-mentioned embodiment is known, because the sweep signal that digit buffer receives the viewing area of display panel 16 to the amplification of sweep signal is walked the different impact of line impedence, these display panel 16 viewing areas receive identical sweep signal, thereby can avoid causing demonstration non-uniform phenomenon, improve display quality.
Above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not depart from the spirit and scope of technical solution of the present invention.
Claims (10)
1. a liquid crystal indicator, comprises gate drivers, data driver and display panel; This gate drivers output scanning signal is to control conducting and the cut-off state of thin film transistor (TFT) array of this display panels, this this display panels display variation of data driver outputting data signals control; Wherein, this gate drivers comprise sweep signal generation unit and with digital buffer cell, this sweep signal generation unit is for according to the generation of clock signal and initial pulse and through sequentially output scanning signal of multiple output channels, and this numeral buffer cell need carry out through long-distance transmissions the amplification processing of a prearranged multiple to the amplitude of the sweep signal of display panel viewing area.
2. liquid crystal indicator as claimed in claim 1, is characterized in that, this display panel comprises viewing area and be arranged at the fan-out region of this viewing area periphery, and this gate drivers and this data driver are arranged at this fan-out region.
3. liquid crystal indicator as claimed in claim 2, is characterized in that, this gate drivers and this data driver are all connected with display panel through cabling, and this cabling district is arranged at fan-out region.
4. liquid crystal indicator as claimed in claim 3, is characterized in that, this numeral buffer cell comprises multiple digit buffers, and one end of each digit buffer is connected with an output channel, and the other end of this each digit buffer is connected with viewing area through cabling.
5. liquid crystal indicator as claimed in claim 4, it is characterized in that, each digit buffer comprises the buffer amplifier that quantity is different, and the enlargement factor of this each buffer amplifier is identical, and the quantity of this buffer amplifier causes the setting of sweep signal attenuation degree according to walking line impedence.
6. liquid crystal indicator as claimed in claim 4, is characterized in that, each digit buffer comprises a buffer amplifier, realizes the amplification to sweep signal by the enlargement factor that regulates this buffer amplifier.
7. liquid crystal indicator as claimed in claim 5, is characterized in that, this digit buffer does not amplify the sweep signal that transfers to display panel through bee-line, and other sweep signals are carried out to the amplification of different multiples according to a prearranged multiple to sweep signal.
8. a gate drivers, comprise sweep signal generation unit and with digital buffer cell, this sweep signal generation unit is for according to the generation of clock signal and initial pulse and through sequentially output scanning signal of multiple output channels; This numeral buffer cell need carry out through long-distance transmissions the amplification processing of a prearranged multiple to the sweep signal of display panel.
9. gate drivers as claimed in claim 8, is characterized in that, this numeral buffer cell comprises multiple digit buffers, and one end of each digit buffer is connected with an output channel, and the other end of this each digit buffer is connected with display panel through cabling.
10. gate drivers as claimed in claim 9, is characterized in that, each digit buffer comprises the buffer amplifier that quantity is different, and the quantity of this buffer amplifier causes the setting of sweep signal attenuation degree according to walking line impedence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310320513.6A CN104123920A (en) | 2013-07-29 | 2013-07-29 | Liquid crystal display device and grid electrode driver thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310320513.6A CN104123920A (en) | 2013-07-29 | 2013-07-29 | Liquid crystal display device and grid electrode driver thereof |
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| CN104123920A true CN104123920A (en) | 2014-10-29 |
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| CN201310320513.6A Pending CN104123920A (en) | 2013-07-29 | 2013-07-29 | Liquid crystal display device and grid electrode driver thereof |
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| CN104810002A (en) * | 2015-05-19 | 2015-07-29 | 武汉华星光电技术有限公司 | Display device |
| WO2016070459A1 (en) * | 2014-11-07 | 2016-05-12 | 深圳市华星光电技术有限公司 | Liquid crystal display device |
| CN106023948A (en) * | 2016-08-10 | 2016-10-12 | 武汉华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display device |
| CN106094376A (en) * | 2016-06-22 | 2016-11-09 | 武汉华星光电技术有限公司 | A kind of array base palte and liquid crystal display |
| CN106940991A (en) * | 2017-04-25 | 2017-07-11 | 深圳市华星光电技术有限公司 | Scan drive circuit and display device |
| CN109491158A (en) * | 2018-11-16 | 2019-03-19 | 昆山龙腾光电有限公司 | A kind of display panel and display device |
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| GB2555151B (en) * | 2014-11-07 | 2021-01-13 | Shenzhen China Star Optoelect | Liquid crystal display |
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Application publication date: 20141029 |