CN103488014A - Pixel structure, display device and overvoltage driving method of liquid crystal panel - Google Patents
Pixel structure, display device and overvoltage driving method of liquid crystal panel Download PDFInfo
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- CN103488014A CN103488014A CN201210195990.XA CN201210195990A CN103488014A CN 103488014 A CN103488014 A CN 103488014A CN 201210195990 A CN201210195990 A CN 201210195990A CN 103488014 A CN103488014 A CN 103488014A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/13624—Active matrix addressed cells having more than one switching element per pixel
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
- G09G3/3659—Control of matrices with row and column drivers using an active matrix the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0252—Improving the response speed
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/16—Determination of a pixel data signal depending on the signal applied in the previous frame
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
Abstract
The invention relates to the technical field of driving of liquid crystal display and discloses a pixel structure, a display device and an overvoltage driving method of a liquid crystal panel. The pixel structure comprises a first transistor Q1, a second transistor Q2, a pixel electrode, a common electrode and a storage capacitor, wherein a grid electrode of the first transistor Q1 is connected with a first grid line G1, and a source electrode of the first transistor Q1 is connected with a first data line S1; a grid electrode of the second transistor Q2 is connected with a second grid line G2, and a source electrode of the second transistor Q2 is connected with a second data line S2; a drain electrode of the first transistor Q1 is connected with the storage capacitor and the pixel electrode; a drain electrode of the second transistor Q2 is connected with the pixel electrode; a pixel capacitor is formed between the pixel electrode and the common electrode. According to the pixel structure, the two transistors are adopted to control the pixel structure, so that accurate control of overdrive voltage is realized, and object brightness is normally displayed.
Description
Technical field
The present invention relates to the Driving technique field of liquid crystal display, particularly relate to a kind of dot structure, display device and overvoltage drive method of liquid crystal panel.
Background technology
Due to frivolous, the little power consumption of liquid crystal, flicker free, the advantage such as handsome in appearance, we are advanced to the flat pannel display epoch.For liquid crystal panel, the response time is the characteristic of liquid crystal molecule slowly.So when showing the image of rapid movement, can produce the phenomenon of so-called motion blur, be commonly called as " hangover " or " ghost ".Aspect the response time of improving liquid crystal display, on the one hand by updating the fabricating technology of material, the research and development New Liquid Crystal material, make liquid crystal property not only more stable, and viscosity is lower, greatly improved liquid crystal response speed, on the other hand by the novel Driving technique of active development, further improving liquid crystal response speed, reducing motion image blurring and flicker aspect and made positive contribution.Because the time of liquid crystal deflection follows driving voltage that relation is arranged, so having proposed the way of overvoltage drive, people improve liquid crystal response speed.
Traditional suchlike defect of overvoltage drive method ubiquity: such as the bad control of driving voltage; driving voltage is crossed conference and is caused normal displaying time inadequate; the too small required overvoltage voltage of display-object GTG that do not reach of driving voltage, so the imagination that often there will be motion blur even to highlight.
Figure 1 shows that existing dot structure, each sub-pix is controlled by a TFT, Q1, Q2 are TFT, Cs1, Cs2 are memory capacitance, Clc1, Clc2 are formed pixel capacitance (also referred to as liquid crystal capacitance) between pixel electrode and public electrode VCOM, G1, G2 are grid line, the voltage that G1, G2 are applied is gate drive voltage Vg1, Vg2, TFT is played to the effect of switch, S1, S2 are data line, source drive voltage Vs1, Vs2 that the voltage that S1, S2 are applied is TFT, the i.e. voltage of actual loaded on pixel.Figure 2 shows that the dot structure to Fig. 1 carries out the voltage sequential chart that overvoltage drive produces, in Fig. 2, N-1, N, N+1 mean three adjacent frames, and Vt means the overvoltage voltage that the display-object GTG is required, and curve wherein means the voltage along with the actual generation of the deflection of liquid crystal.In overvoltage drive mode shown in Fig. 1 and Fig. 2, the voltage Vr(of actual loaded on pixel be 5V for example) for example, than target voltage large (3V), therefore the obvious defect caused like this is exactly easily to make the retention time of liquid crystal when object brightness too short, still than being easier to cause the image quality problem such as motion blur.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is: how to realize the accurate control of overdrive voltage.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of dot structure of liquid crystal panel, comprise: the first transistor Q1, transistor seconds Q2, pixel electrode, public electrode and memory capacitance, the grid of described the first transistor Q1 connects the first grid line G1, source electrode connects the first data line S1, the grid of transistor seconds Q2 connects the second grid line G2, and source electrode connects the second data line S2; The drain electrode of described the first transistor Q1 is connected with described memory capacitance and pixel electrode, and the drain electrode of described transistor seconds Q2 is connected with described pixel electrode, between described pixel electrode and public electrode, forms pixel capacitance.
Preferably, described the first transistor Q1 and transistor seconds Q2 are TFT.
The present invention also provides a kind of display device, comprises described dot structure.
The present invention also provides a kind of overvoltage drive method, is applied to, in described dot structure, comprise the following steps:
A1, by described the first grid line G1, described the first transistor Q1 is applied to first grid driving voltage Vg1, by the first data line S2, the first transistor Q1 is applied to the first source drive voltage Vs1, the first transistor Q1 outputs to described pixel electrode by described the first source drive voltage Vs1 more simultaneously;
A2, described the first transistor Q1 is applied to n second after first grid driving voltage Vg1, by described the second grid line G2, described transistor seconds Q2 is applied to second grid driving voltage Vg2, Vg1 is identical with the waveform of Vg2, by the second data line S2, transistor seconds Q2 is applied to the second source drive voltage Vs2, transistor seconds Q2 outputs to described pixel electrode by described the second source drive voltage Vs2 more simultaneously.
Preferably, the size of described the first source drive voltage Vs1 and the second source drive voltage Vs2 is controlled by external drive IC.
Preferably, the size of time n was determined according to the response time of described liquid crystal panel and the value of Vs1, Vs2.
Preferably, described the first source drive voltage Vs1 is overdrive voltage, and the second source drive voltage Vs2 is the needed voltage of display-object GTG, and Vs1 > Vs2.
(3) beneficial effect
Technique scheme has following advantage: by adopting dot structure of two transistor controls, realized the accurate control of overdriving, thereby realized the normal demonstration of object brightness.
The accompanying drawing explanation
Fig. 1 is existing dot structure figure;
Fig. 2 carries out for the dot structure to Fig. 1 the voltage sequential chart that overvoltage drive produces;
Fig. 3 is dot structure figure of the present invention;
Fig. 4 is method flow diagram of the present invention;
Fig. 5 carries out for the dot structure to Fig. 3 the voltage sequential chart that overvoltage drive produces.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for the present invention is described, but are not used for limiting the scope of the invention.
Embodiment mono-
As shown in Figure 3, the invention provides a kind of dot structure of liquid crystal panel, comprise: the first transistor Q1, transistor seconds Q2, pixel electrode, public electrode and memory capacitance, the grid of described the first transistor Q1 connects the first grid line G1, source electrode connects the first data line S1, the grid of transistor seconds Q2 connects the second grid line G2, and source electrode connects the second data line S2; The drain electrode of described the first transistor Q1 is connected with described memory capacitance and pixel electrode, and the drain electrode of described transistor seconds Q2 is connected with described pixel electrode, between described pixel electrode and public electrode, forms pixel capacitance.Q1 and Q2 are TFT.
Embodiment bis-
The present embodiment provides a kind of display device (for example liquid crystal display), comprises the described dot structure of embodiment mono-.
Embodiment tri-
As shown in Figure 4, the present invention also provides a kind of overvoltage drive method, and it is applied to, in the dot structure of embodiment mono-, comprise the following steps:
A1, by described the first grid line G1, the grid of described the first transistor Q1 is applied to first grid driving voltage Vg1, thereby Q1 is opened, by the first data line S1, the source electrode of the first transistor Q1 is applied to the first source drive voltage Vs1, the first transistor Q1 outputs to described pixel electrode by described the first source drive voltage Vs1 more simultaneously;
A2, described the first transistor Q1 is applied to n second after first grid driving voltage Vg1, by described the second grid line G2, described transistor seconds Q2 is applied to second grid driving voltage Vg2, thereby Q2 is opened, Vg1 is identical with the waveform of Vg2, by the second data line S2, the source electrode of transistor seconds Q2 is applied to the second source drive voltage Vs2, transistor seconds Q2 outputs to described pixel electrode by described the second source drive voltage Vs2 more simultaneously.The the first source drive voltage Vs1 that imposes on Q1 is overdrive voltage, and the second source drive voltage Vs2 that imposes on Q2 is the needed voltage of display-object GTG, i.e. target voltage, Vs1 > Vs2.
The size of described the first source drive voltage Vs1 and the second source drive voltage Vs2 is controlled by external drive IC.The size of time n can be detected and be drawn by optical device according to the response time of described liquid crystal panel and the value of Vs1, Vs2.Realize the accurate control of overdriving by the size of controlling the first source drive voltage Vs1 and the second source drive voltage Vs2, the size (imposing on the time interval of the voltage of Q1, Q2 source electrode) of time n.Below illustrate:
As shown in Figure 5, suppose that Vs1 is 5V, Vs2 is 3V, the voltage the VOD so dot structure shown in Fig. 3 applied is: at time period n, take interior is 5V, after time period n, be 3V, because the n value can precompute, therefore, after the overvoltage that applies 5V, n directly applies target voltage 3V second again, so just realized the accurate control of overdriving, therefore, than the prior art shown in Fig. 1 and Fig. 2, use method of the present invention to be not easy to occur that the retention time of liquid crystal when object brightness is too short, and the image quality problem such as motion blur, thereby realized the normal demonstration of object brightness.
As can be seen from the above embodiments, the present invention, by adopting dot structure of two transistor controls, has realized the accurate control of overdriving, thereby has realized the normal demonstration of object brightness.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and replacement, these improvement and replacement also should be considered as protection scope of the present invention.
Claims (7)
1. the dot structure of a liquid crystal panel, it is characterized in that, comprise: the first transistor Q1, transistor seconds Q2, pixel electrode, public electrode and memory capacitance, the grid of described the first transistor Q1 connects the first grid line G1, source electrode connects the first data line S1, the grid of transistor seconds Q2 connects the second grid line G2, and source electrode connects the second data line S2; The drain electrode of described the first transistor Q1 is connected with described memory capacitance and pixel electrode, and the drain electrode of described transistor seconds Q2 is connected with described pixel electrode, between described pixel electrode and public electrode, forms pixel capacitance.
2. dot structure as claimed in claim 1, is characterized in that, described the first transistor Q1 and transistor seconds Q2 are TFT.
3. a display device, is characterized in that, comprises the described dot structure of claim 1 or 2.
4. an overvoltage drive method, be applied to, in the described dot structure of claim 1 or 2, it is characterized in that, comprises the following steps:
A1, by described the first grid line G1, described the first transistor Q1 is applied to first grid driving voltage Vg1, by the first data line S2, the first transistor Q1 is applied to the first source drive voltage Vs1, the first transistor Q1 outputs to described pixel electrode by described the first source drive voltage Vs1 more simultaneously;
A2, described the first transistor Q1 is applied to n second after first grid driving voltage Vg1, by described the second grid line G2, described transistor seconds Q2 is applied to second grid driving voltage Vg2, Vg1 is identical with the waveform of Vg2, by the second data line S2, transistor seconds Q2 is applied to the second source drive voltage Vs2, transistor seconds Q2 outputs to described pixel electrode by described the second source drive voltage Vs2 more simultaneously.
5. method as claimed in claim 4, is characterized in that, the size of described the first source drive voltage Vs1 and the second source drive voltage Vs2 is controlled by external drive IC.
6. method as claimed in claim 4, is characterized in that, the size of time n was determined according to the response time of described liquid crystal panel and the value of Vs1, Vs2.
7. method as claimed in claim 4, is characterized in that, described the first source drive voltage Vs1 is overdrive voltage, and the second source drive voltage Vs2 is the needed voltage of display-object GTG, and Vs1 > Vs2.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210195990.XA CN103488014A (en) | 2012-06-13 | 2012-06-13 | Pixel structure, display device and overvoltage driving method of liquid crystal panel |
| PCT/CN2012/083156 WO2013185425A1 (en) | 2012-06-13 | 2012-10-18 | Pixel structure, display device and over-driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210195990.XA CN103488014A (en) | 2012-06-13 | 2012-06-13 | Pixel structure, display device and overvoltage driving method of liquid crystal panel |
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| CN103488014A true CN103488014A (en) | 2014-01-01 |
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| CN201210195990.XA Pending CN103488014A (en) | 2012-06-13 | 2012-06-13 | Pixel structure, display device and overvoltage driving method of liquid crystal panel |
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| WO (1) | WO2013185425A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105116659A (en) * | 2015-09-28 | 2015-12-02 | 重庆京东方光电科技有限公司 | Array substrate and display driving method thereof and display device |
| CN107331363A (en) * | 2017-08-23 | 2017-11-07 | 京东方科技集团股份有限公司 | A kind of array base palte, its driving method and display device |
| CN107479281A (en) * | 2017-08-29 | 2017-12-15 | 京东方科技集团股份有限公司 | A kind of image element circuit, dot structure and display panel |
| US10488727B2 (en) | 2017-04-27 | 2019-11-26 | Xiamen Tianma Micro-Electronics Co., Ltd. | Array substrate including insulated pixel electrodes, liquid crystal display panel, and pixel charging method |
| CN113205782A (en) * | 2020-01-31 | 2021-08-03 | 夏普株式会社 | Liquid crystal display device and driving method thereof |
| CN116580677A (en) * | 2023-07-06 | 2023-08-11 | 惠科股份有限公司 | Display panel, driving method thereof, and electronic device |
| US12266323B2 (en) | 2023-07-06 | 2025-04-01 | HKC Corporation Limited | Display panel and driving method thereof, and electronic device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338869B (en) * | 2016-11-04 | 2019-03-08 | 北京京东方专用显示科技有限公司 | Liquid crystal display |
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- 2012-06-13 CN CN201210195990.XA patent/CN103488014A/en active Pending
- 2012-10-18 WO PCT/CN2012/083156 patent/WO2013185425A1/en active Application Filing
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116659A (en) * | 2015-09-28 | 2015-12-02 | 重庆京东方光电科技有限公司 | Array substrate and display driving method thereof and display device |
| US10488727B2 (en) | 2017-04-27 | 2019-11-26 | Xiamen Tianma Micro-Electronics Co., Ltd. | Array substrate including insulated pixel electrodes, liquid crystal display panel, and pixel charging method |
| CN107331363A (en) * | 2017-08-23 | 2017-11-07 | 京东方科技集团股份有限公司 | A kind of array base palte, its driving method and display device |
| CN107479281A (en) * | 2017-08-29 | 2017-12-15 | 京东方科技集团股份有限公司 | A kind of image element circuit, dot structure and display panel |
| CN107479281B (en) * | 2017-08-29 | 2020-05-22 | 京东方科技集团股份有限公司 | A pixel circuit, pixel structure and display panel |
| CN113205782A (en) * | 2020-01-31 | 2021-08-03 | 夏普株式会社 | Liquid crystal display device and driving method thereof |
| CN116580677A (en) * | 2023-07-06 | 2023-08-11 | 惠科股份有限公司 | Display panel, driving method thereof, and electronic device |
| CN116580677B (en) * | 2023-07-06 | 2023-09-19 | 惠科股份有限公司 | Display panel, driving method thereof and electronic equipment |
| US12266323B2 (en) | 2023-07-06 | 2025-04-01 | HKC Corporation Limited | Display panel and driving method thereof, and electronic device |
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| WO2013185425A1 (en) | 2013-12-19 |
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