CN102393590A - Liquid crystal display (LCD) device - Google Patents
Liquid crystal display (LCD) device Download PDFInfo
- Publication number
- CN102393590A CN102393590A CN2011103858646A CN201110385864A CN102393590A CN 102393590 A CN102393590 A CN 102393590A CN 2011103858646 A CN2011103858646 A CN 2011103858646A CN 201110385864 A CN201110385864 A CN 201110385864A CN 102393590 A CN102393590 A CN 102393590A
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- change
- crystal panel
- over circuit
- public electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a liquid crystal display (LCD) device. The device comprises a liquid crystal panel, gate drivers, source drivers, first switching circuits and second switching circuits, wherein the gate drivers are used for providing gate signals to scanning lines on the liquid crystal panel; the source drivers are used for providing data voltage to data lines on the liquid crystal panel; and the first switching circuits and the second switching circuits are used for switching the gate signals into first common electrode voltage and second common electrode voltage at the sides of an array substrate on the liquid crystal panel respectively. The device has the following beneficial effects: the flicker phenomenon of the panel can be eliminated and the pixel charging capacity can not be reduced.
Description
Technical field
The present invention relates to a kind of display device, particularly a kind of liquid crystal indicator.
Background technology
At present, the size of liquid crystal panel (being called for short " panel ") increases day by day, and frequency is also increasingly high, and the pixel charging ability becomes a major challenge of design.Since the maximization of panel, scintillation also more difficulty overcome.Analyze the flicker reason; Be because the sweep signal distortion that the delay of sweep trace capacitance-resistance causes; Thereby cause panel from left to right, each area pixel electrode recalcitrate voltage inconsistent (promptly from left to right reduce, for the panel of single-ended drive); And large size panel generally adopts both-end to drive; The sweep trace capacitance-resistance postpones the most serious position at the panel middle part, each regional pixel electrode voltage (distribution of public electrode voltages Vcom in panel that is the color membrane substrates side is inconsistent) also inequality like this, thus cause the panel flash phenomenon.Prior art has two kinds of methods to improve this phenomenon; The one, in the gate terminal of TFT (thin film transistor (TFT)) top rake voltage is set, the 2nd, the part capacitance-resistance of gate terminal is moved on to outside the viewing area of panel, but these two kinds of methods have all reduced the charging ability of pixel electrode; Make and originally just be difficult to the saturated requirement of charging that realizes; Make the matter worse especially, and prior art can only improve scintillation, can not eliminate.
Summary of the invention
Goal of the invention: the problem and shortage to above-mentioned existing existence, the purpose of this invention is to provide a kind of liquid crystal indicator, the scintillation of panel can be eliminated, and the pixel charging ability can not be reduced.
Technical scheme: for realizing the foregoing invention purpose, the technical scheme that the present invention adopts is a kind of liquid crystal indicator, comprising:
Liquid crystal panel;
Gate drivers is used to provide the sweep trace of gate signal to the said liquid crystal panel;
Source electrode driver is used to provide the data line of data voltage to the said liquid crystal panel;
First change-over circuit and second change-over circuit are used for said gate signal is converted into respectively first public electrode voltages and second public electrode voltages of the array base palte side on the said liquid crystal panel.
Said gate drivers can accomplished or be integrated in to said first change-over circuit and second change-over circuit when making said array base palte.
The polarity of said first public electrode voltages and second public electrode voltages can be opposite.
Said gate drivers can be arranged on the both sides of liquid crystal panel, and said first change-over circuit and second change-over circuit can be separately positioned on the two ends of liquid crystal panel.
Beneficial effect: the public electrode voltages of liquid crystal panel of the present invention is not by traditional COF (Chip On Film; Flexible circuit board) external providing; But gate signal is converted to synchronously through change-over circuit; Because panel is shown as Dot inversion (some counter-rotating), therefore every sweep trace need be equipped with two change-over circuits.The Vcom that the present invention can unitize in the panel distributes, and eliminates scintillation, and can not reduce the pixel charging ability.In addition, large size panel uses the precharge design usually, and the present invention is suitable equally.
Description of drawings
Fig. 1 is the structural representation of liquid crystal indicator of the present invention;
Fig. 2 is the driving synoptic diagram of the embodiment of the invention 1;
Fig. 3 is the oscillogram of sweep trace and the public electrode wire of Fig. 2;
Fig. 4 is the driving synoptic diagram of the embodiment of the invention 2;
Fig. 5 is the oscillogram of sweep trace and the public electrode wire of Fig. 4;
Fig. 6 is the oscillogram of the sweep trace and the public electrode wire of precharge mode.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment; Further illustrate the present invention; Should understand these embodiment only be used to the present invention is described and be not used in the restriction scope of the present invention; After having read the present invention, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
As shown in Figure 1; The array base palte of liquid crystal panel comprises the sweep trace and the data line that vertically is provided with of horizontally set; The left and right sides of array base palte is provided with gate drivers; Gate drivers provides gate signal to sweep trace, and the upside of array base palte is provided with source electrode driver, and source electrode driver provides data voltage to data line.The public electrode voltages of array base palte side of the present invention is not to be provided by traditional COF that is connected with liquid crystal panel, but through the change-over circuit (change-over circuit also can be integrated in gate drivers) that is formed by the array base palte processing procedure that is connected with sweep trace gate signal is converted to synchronously.Because being shown as a counter-rotating, panel shows that therefore every sweep trace need be equipped with two change-over circuits: the input end of first change-over circuit and second change-over circuit is connected sweep trace respectively, and output terminal connects first public electrode wire and second public electrode wire respectively.In addition, large size panel as shown in Figure 1 adopts both-end to drive, and first change-over circuit and second change-over circuit all are positioned at outside the viewing area, in order to avoid influence aperture ratio of pixels.TN of the present invention (Twisted Nematic, twisted-nematic), VA (Vertical Alignment, vertical orientation) and three kinds of display modes of IPS (In-Plane Switching, plane conversion) all are suitable for.
Embodiment 1:
As shown in Figure 2, pixel electrode is positioned at the sweep trace and the zone that data line surrounded that vertically is provided with of horizontally set, and the grid of thin film transistor (TFT) (TFT) connects sweep trace, and (Gn among the figure representes n bar sweep trace; By that analogy); Source electrode connects data line, and drain electrode connects pixel electrode, and every row's pixel electrode from left to right polarity is positive and negative alternately; And the pixel electrode of negative polarity and the first public electrode wire CS1 are overlapping, and the pixel electrode of positive polarity and the second public electrode wire CS2 are overlapping.From vertically seeing, putting in order of public electrode wire is followed successively by CS1, CS2, CS2, CS1, CS1, CS2 ...Referring to Fig. 3, if pixel electrode is a positive polarity, then when gate signal was closed, the second corresponding public electrode wire voltage was changed to height by low again; If pixel electrode is a negative polarity, when then gate signal was closed, the second corresponding public electrode wire voltage was changed to low by height.Through the coupling effect that public electrode voltages change to produce, compensated scanning line capacitance-resistance postpones the voltage differences that recalcitrates that causes.The change-over circuit that preamble is mentioned is promptly realized gate signal is converted to first public electrode voltages and second public electrode voltages.In addition, the sequential and the gate signal of first public electrode voltages and second public electrode voltages are synchronous, and the concrete setting value of its high voltage and low-voltage can be according to simulation and system's practical adjustments, to reach optimal display result.
Embodiment 2:
Like Fig. 4 and shown in Figure 5, the difference of present embodiment and embodiment 1 is: from vertically seeing, putting in order of public electrode wire is followed successively by CS1, CS2, CS1, CS2 ...
The mechanism of production that recalcitrates voltage (Feed through voltage) of pixel electrode: when gate signal is closed, promptly by high level when low level changes, pixel electrode voltage can be by pulling downwards, this change in voltage is to be called and recalcitrates voltage.Sweep trace exists capacitance-resistance to postpone from left to right, and the voltage that recalcitrates of corresponding pixel electrode can be variant, popular as to say, sweep trace postpones big more position, and it is more little to recalcitrate voltage, and corresponding pixel electrode voltage is high more.So, from left to right, pixel electrode voltage is also also inconsistent.Along with the increase of panel size and resolution, the increase that causes sweep trace to postpone, the difference that recalcitrates voltage also increases thereupon, and the public electrode voltages Vcom of color membrane substrates side just is difficult to value, thereby produces serious scintillation.If adopt the present invention; Because the variation of the public electrode voltages of array base palte side is consistent with the situation that recalcitrates change in voltage that the sweep trace capacitance-resistance postpones to cause; Therefore pixel electrode recalcitrates the big position of voltage; Be coupled also greatly by public electrode wire, pixel electrode recalcitrate the little position of voltage, be coupled also for a short time by public electrode wire.Illustrate, suppose the panel that adopts both-end to drive, do not adopt when of the present invention, the voltage that recalcitrates of high order end pixel electrode is 1V, and the voltage that recalcitrates of intermediate pixel electrode is 0.5V; If adopt the present invention; The high order end pixel electrode voltage can be by the public electrode wire 1V that upwards is coupled; And the intermediate pixel electrode voltage can be by the public electrode wire 0.5V that upwards is coupled; And zone between the two is asymptotic variation, so whole front panel pixel electrode voltage from left to right will be equally big, scintillation will disappear.
In addition; General large scale high frequency panel; Adopt the gate signal dipulse to solve the undercharge problem of pixel electrode, i.e. precharge design, and the first public electrode voltages CS1 and also synchronous double pulse thereupon of the second public electrode voltages CS2; Same each pixel electrode of compensate for lateral recalcitrates voltage, makes its size consistent.Therefore the present invention is equally applicable to precharge design, and the corresponding driving waveform is as shown in Figure 6.
Claims (5)
1. liquid crystal indicator comprises:
Liquid crystal panel;
Gate drivers is used to provide the sweep trace of gate signal to the said liquid crystal panel;
Source electrode driver is used to provide the data line of data voltage to the said liquid crystal panel;
First change-over circuit and second change-over circuit are used for said gate signal is converted into respectively first public electrode voltages and second public electrode voltages of the array base palte side on the said liquid crystal panel.
2. according to the said liquid crystal indicator of claim 1, it is characterized in that: said first change-over circuit and second change-over circuit are accomplished when making said array base palte.
3. according to the said liquid crystal indicator of claim 1, it is characterized in that: said first change-over circuit and second change-over circuit are integrated in said gate drivers.
4. according to the said liquid crystal indicator of claim 1, it is characterized in that: the polarity of said first public electrode voltages and second public electrode voltages is opposite.
5. according to the said liquid crystal indicator of claim 1, it is characterized in that: said gate drivers is arranged on the both sides of liquid crystal panel, and said first change-over circuit and second change-over circuit are separately positioned on the two ends of liquid crystal panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103858646A CN102393590A (en) | 2011-11-29 | 2011-11-29 | Liquid crystal display (LCD) device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103858646A CN102393590A (en) | 2011-11-29 | 2011-11-29 | Liquid crystal display (LCD) device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102393590A true CN102393590A (en) | 2012-03-28 |
Family
ID=45860939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103858646A Pending CN102393590A (en) | 2011-11-29 | 2011-11-29 | Liquid crystal display (LCD) device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102393590A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777932A (en) * | 2015-04-01 | 2015-07-15 | 深圳市华星光电技术有限公司 | Touch control liquid crystal display and touch control liquid crystal panel thereof |
| CN109584833A (en) * | 2019-01-21 | 2019-04-05 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101071215A (en) * | 2007-07-12 | 2007-11-14 | 昆山龙腾光电有限公司 | Regulating device and method for reducing liquid crystal display panel scintillation and liquid crystal display panel |
| CN102053412A (en) * | 2009-11-05 | 2011-05-11 | 乐金显示有限公司 | Liquid crystal display |
| CN102255543A (en) * | 2011-07-21 | 2011-11-23 | 福建华映显示科技有限公司 | Power supply apparatus capable of improving flicker phenomenon of liquid crystal display (LCD), LCD capable of improving flicker phenomenon, and method thereof |
-
2011
- 2011-11-29 CN CN2011103858646A patent/CN102393590A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101071215A (en) * | 2007-07-12 | 2007-11-14 | 昆山龙腾光电有限公司 | Regulating device and method for reducing liquid crystal display panel scintillation and liquid crystal display panel |
| CN102053412A (en) * | 2009-11-05 | 2011-05-11 | 乐金显示有限公司 | Liquid crystal display |
| CN102255543A (en) * | 2011-07-21 | 2011-11-23 | 福建华映显示科技有限公司 | Power supply apparatus capable of improving flicker phenomenon of liquid crystal display (LCD), LCD capable of improving flicker phenomenon, and method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777932A (en) * | 2015-04-01 | 2015-07-15 | 深圳市华星光电技术有限公司 | Touch control liquid crystal display and touch control liquid crystal panel thereof |
| CN109584833A (en) * | 2019-01-21 | 2019-04-05 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101520998B (en) | Picture flicker improvable liquid crystal display device and relevant driving method thereof | |
| CN103730093B (en) | Array substrate drive circuit, array substrate and corresponding liquid crystal displayer | |
| US9196211B2 (en) | Shift register unit, gate driving circuit and display device | |
| US8902203B2 (en) | Liquid crystal display and pulse adjustment circuit thereof | |
| CN103280201B (en) | Gate drive apparatus and display device | |
| CN104952409A (en) | Gate drive unit, drive method of gate drive unit, gate drive circuit and display device | |
| US20160180964A1 (en) | Shift register unit, gate driving circuit and display device | |
| US9824653B2 (en) | Liquid crystal display and method for driving the same | |
| US20120249492A1 (en) | Liquid crystal display | |
| CN109509446B (en) | Display module and display device | |
| CN202710889U (en) | Array substrate unit, array substrate, liquid crystal display panel and liquid crystal display device | |
| US20160300523A1 (en) | Emission electrode scanning circuit, array substrate and display apparatus | |
| CN103065596A (en) | Liquid crystal display | |
| CN104934005A (en) | Display panel and display device | |
| CN102087433B (en) | Liquid crystal display | |
| CN103400559A (en) | Display device | |
| US9564454B2 (en) | TFT array substrate, display panel and display device | |
| US11640808B2 (en) | Array substrate row drive circuit unit, drive circuit and liquid crystal display panel thereof | |
| CN108873530B (en) | Array substrate, display panel and display device | |
| CN106935168A (en) | Shift register and display device | |
| US11430400B2 (en) | Display panel, driving method and display device | |
| CN103077690B (en) | Gate drivers and liquid crystal display | |
| CN203552663U (en) | Shifting register unit, gate drive device and display device | |
| CN102393590A (en) | Liquid crystal display (LCD) device | |
| US20130093740A1 (en) | Liquid crystal array and liquid crystal display panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120328 |