CN102201208B - Liquid crystal display and control method thereof - Google Patents
Liquid crystal display and control method thereof Download PDFInfo
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- CN102201208B CN102201208B CN 201010154769 CN201010154769A CN102201208B CN 102201208 B CN102201208 B CN 102201208B CN 201010154769 CN201010154769 CN 201010154769 CN 201010154769 A CN201010154769 A CN 201010154769A CN 102201208 B CN102201208 B CN 102201208B
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- liquid crystal
- update frequency
- crystal display
- clock
- picture frame
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000011521 glass Substances 0.000 claims abstract description 13
- 239000010409 thin film Substances 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a liquid crystal display and a control method thereof, which are used for displaying a plane image and displaying a three-dimensional image by matching with shutter glasses. When receiving a plurality of frame signals, the control module controls the first timing controller to input the frame signals to the display panel according to a frame clock according to the updating frequency of the frame signals, and controls the second timing controller to invert the polarity of the frame signals according to an inversion clock. The period of the reverse clock is N times of the period of the frame clock, and N is a positive integer greater than 1. The liquid crystal display and the control method thereof can eliminate the phenomena of direct current ghost and picture flicker caused by switching the liquid crystal display from the three-dimensional mode to the two-dimensional plane mode.
Description
Technical field
The invention relates to a kind of liquid crystal display and control method thereof, particularly show liquid crystal display and the control method thereof of stereopsis about a kind of for display plane image and collocation shutter glasses.
Background technology
At present, it has the characteristic of liquid crystal common liquid crystal display, must intersect in the mode that exchanges and supply with its needed control voltage, otherwise the characteristic of liquid crystal will be destroyed, that is its even number picture is necessary for negative polarity when the odd number picture is positive polarity, and the voltage of its both positive and negative polarity is necessary consistent, and this mode just is called reversal of poles (Inversion).Common reversal of poles has following five kinds: picture frame reversal of poles (Frame Inversion), row reversal of poles (Row Inversion), row reversal of poles (ColumnInversion), point-polarity counter-rotating (Dot Inversion) and line reversal of poles (Line Inversion).
And the shutter glasses (Shutter glasses) of arranging in pairs or groups on the market at present is to show the 3D display of 3 D stereoscopic image (3DImage), its frame updating frequency (Refresh rate) must reach more than the 120Hz, wherein half is to be responsible for upgrading the picture of left eye, and second half then is the picture of being responsible for upgrading right eye.If therefore the odd number picture is the image of seeing to left eye, the even number picture then must be the image of seeing to right eye; If drive the angle of (Inversion type) with conventional polar, if the odd number picture of seeing to left eye is positive polarity when driving, the even number picture of seeing to right eye just is necessary for negative polarity and drives.But owing to have parallax between people's the right and left eyes, thus on the 3D display same point of shown picture, giving left eye and the image of seeing to right eye just can be different GTG degree.Yet, as shown in Figure 1, owing to just exist the difference of GTG for the image of right and left eyes itself, cause the positive-negative half-cycle charging voltage just unequal; When the stereoscopic three-dimensional Image Display of a static state for a long time after, can produce a Dc bias (DC offset), so that in the time of display switchback 2D pattern, the scintillation of screen so can occur in the Voltage unbalance that residual Dc bias namely can cause positive-negative polarity to drive.
Summary of the invention
Because the problem that above-mentioned prior art exists the object of the present invention is to provide a kind of liquid crystal display and control method thereof, switch back direct current ghost and the film flicker phenomenon that the two dimensional surface pattern is caused to solve liquid crystal display from the 3 D stereo pattern.
According to purpose of the present invention, a kind of liquid crystal display is proposed, be used for showing 3-dimensional image, it comprises a display panel, one first time schedule controller, one second time schedule controller and a control module.The first time schedule controller and the second time schedule controller are electrically connected display panel.The control module is when receiving a plurality of picture frame signal, control the first time schedule controller according to the renewal frequency of a plurality of picture frame signals and according to a picture frame clock pulse picture frame signal is passed into display panel, and control the second time schedule controller according to the polarity of a counter-rotating clock pulse counter-rotating picture frame signal.Wherein, the counter-rotating clock pulse cycle is N times of picture frame clock pulse cycle, and N is the positive integer greater than 1.
According to purpose of the present invention, reintroduce a kind of liquid crystal display, be used for to show bidimensional image or cooperate a shutter glasses and show 3-dimensional image that it comprises a plurality of pixel cells, a gate pole driver, one source pole driver, one first time schedule controller, one second time schedule controller and a control module.Wherein each pixel cell comprises a thin film transistor (TFT), a liquid crystal capacitance and reaches a storage capacitors, the drain of storage capacitors and liquid crystal capacitance thin film transistor (TFT) in parallel.Gate pole driver is electrically connected the gate of each thin film transistor (TFT), and a plurality of gate voltage are provided.Source electrode driver is electrically connected the source electrode of each thin film transistor (TFT), and a plurality of data voltages are provided.The first time schedule controller and the second time schedule controller are electrically connected and the control source electrode driver.The control module is when receiving a plurality of picture frame signal, renewal frequency control grid driver according to the picture frame signal passes into gate voltage, and control the first time schedule controller and according to a picture frame clock pulse picture frame signal is passed into pixel cell with a data voltage, and control the second time schedule controller according to the polarity of a counter-rotating clock pulse reversal data voltage.Wherein, the N that the described counter-rotating clock pulse cycle is the described picture frame clock pulse cycle times, N is the positive integer greater than 1.
According to purpose of the present invention, a kind of display packing of liquid crystal display is proposed again, be used for to show bidimensional image or cooperate a shutter glasses and show 3-dimensional image, it comprises the following step: the renewal frequency that receives and detect a plurality of picture frame signals, provide a plurality of picture frame signals with a picture frame clock pulse again, at last with the reverse polarity of described a plurality of picture frame signals of a counter-rotating clock pulse.Wherein, the N that the described counter-rotating clock pulse cycle is the described picture frame clock pulse cycle times, N is the positive integer greater than 1.
From the above, according to liquid crystal display of the present invention and control method thereof, it can have one or more following advantage:
(1) this liquid crystal display and control method thereof can be by respectively comprising a plurality of picture frame data at the positive negative cycle that passes into the picture frame signal, carry out again reversal of poles, switch back direct current ghost and the film flicker phenomenon that the two dimensional surface pattern causes and can eliminate liquid crystal display from the 3 D stereo pattern.
(2) this liquid crystal display and control method thereof can be judged by the control module frequency of the picture frame data that receive, and automatically switch two dimensional surface display mode or 3 D stereo display mode are promoted the elasticity on using.
Description of drawings
Fig. 1 is the curve map that existing picture frame signal discharges and recharges;
Fig. 2 is the calcspar of liquid crystal display of the present invention;
Fig. 3 is the circuit diagram of liquid crystal display of the present invention;
Fig. 4 is the curve map that the picture frame signal of first embodiment of the invention discharges and recharges;
Fig. 5 is the curve map that the picture frame signal of second embodiment of the invention discharges and recharges;
Fig. 6 is the process flow diagram of the control method of liquid crystal display of the present invention.
[primary clustering symbol description]
1: liquid crystal display; 10: display panel;
100: pixel cell; 1000: thin film transistor (TFT);
1001: liquid crystal capacitance; 1002: storage capacitors;
101: gate pole driver; 1010: gate voltage;
102: source electrode driver; 1020: data voltage;
11: the first time schedule controllers; 110: the picture frame clock pulse;
12: the second time schedule controllers; 120: the counter-rotating clock pulse;
13: the control module; 2: the picture frame signal;
20: the first default renewal frequencies; 21: the second default renewal frequencies;
Vcom: reference voltage level; S1～S3: step.
Embodiment
See also Fig. 2, it is the calcspar of liquid crystal display of the present invention.As shown in the figure, liquid crystal display 1 of the present invention comprises a display panel 10, one first time schedule controller 11, one second time schedule controller 12 and a control module 13, and display panel 10 more comprises a plurality of pixel cells 100, a gate pole driver 101 and one source pole driver 102.The first time schedule controller 11 and the second time schedule controller 12 are electrically connected display panel 10, and the start of control display panel 10.Control module 13 is electrically connected the first time schedule controller 11 and the second time schedule controller 12, it is when receiving a plurality of picture frame signal 2, different renewal frequency (the first default renewal frequency 20 and the second default renewal frequency 21) control the first time schedule controller 11 according to picture frame signal 2 passes into display panel 10 with a picture frame clock pulse 110 with picture frame signal 2 and shows, and controls the second time schedule controller 12 with the polarity of a counter-rotating clock pulse 120 counter-rotating picture frame signals 2.Wherein, the counter-rotating clock pulse cycle is N times of picture frame clock pulse cycle, and N is the positive integer greater than 1.
Wherein, the first default renewal frequency 20 is less than the second default renewal frequency 21, and it is identical with 110 cycles of picture frame clock pulse that control module 13 controls the second time schedule controller 12 is set counter-rotating 120 cycles of clock pulse, and 120 counter-rotatings have the polarity of the picture frame signal 2 of first frequency 20 according to the counter-rotating clock pulse; In addition, when picture frame signal 2 has second frequency 21, control module 13 is more controlled the second time schedule controller 12 and is set the N doubly (N for greater than 1 positive integer) that counter-rotating 120 cycles of clock pulse are 110 cycles of picture frame clock pulse, and according to the reverse polarity of picture frame signal 2 with second frequency 21 of counter-rotating clock pulse 120.
See also Fig. 3, it is the circuit diagram of liquid crystal display of the present invention.As shown in the figure, it is the equivalent electrical circuit of this liquid crystal display 1 full wafer panel, each pixel cell 100 is a demonstration point on the practice, a thin film transistor (TFT) 1000, a liquid crystal capacitance 1001 and a storage capacitors 1002 have been comprised, the drain of storage capacitors 1002 and liquid crystal capacitance 1001 thin film transistor (TFT)s 1000 in parallel.Gate pole driver 101 then is electrically connected the gate of each thin film transistor (TFT) 1000, and a plurality of gate voltage 1010 are provided.102 source electrodes that are electrically connected each thin film transistor (TFT) 1000 of source electrode driver, and a plurality of data voltages 1020 are provided.In addition, the first time schedule controller 11 and the second time schedule controller 12 further are electrically connected and control source electrode driver 102.13 of control modules are electrically connected gate pole driver 101, the first time schedule controller 11 and the second time schedule controller 12, and when receiving picture frame signal 2, different update frequency (the first default renewal frequency 20 and the second default renewal frequency 21) control grid driver 101 according to picture frame signal 2 passes into gate voltage 1010, sequentially to open each thin film transistor (TFT) 1000, and control the first time schedule controller 11 and according to picture frame clock pulse 110 picture frame signal 2 is passed into pixel cell 100, control again the second time schedule controller 12 according to the polarity of counter-rotating clock pulse 120 counter-rotating picture frame signals 2.
The default renewal frequency of the bidimensional image picture that general liquid crystal display is commonly used is 60Hz, and in one embodiment, the first default renewal frequency is 60Hz, and the second default renewal frequency is 120Hz.And because the 3D display of shutter glasses (Shutter glasses) with demonstration 3 D stereoscopic image (3D Image) of arranging in pairs or groups on the market at present, its frame updating frequency (Refresh rate) must reach more than the 120Hz, wherein half is to be responsible for upgrading the picture of left eye, second half then is the picture of being responsible for upgrading right eye, on the practice, by demonstration picture element Alternation Display left eye picture and the right eye picture of liquid crystal display.The data of its picture are sent the picture frame signal of different frequency to liquid crystal display by a display card, in the time of even will showing the picture data of two dimensional surface, display card just sends the picture frame signal of the renewal frequency with 60Hz to liquid crystal display, if but will show the picture data of 3 D stereo picture the time, display card then sends the picture frame signal of the renewal frequency that has more than the 120Hz to liquid crystal display.
So control module 13 is when receiving picture frame signal 2, the renewal frequency of at first just detecting first and recognize this picture frame signal 2 is the first default renewal frequency 20 (60Hz) or the second default renewal frequency 21 (120Hz).If control module 13 is judged when the renewal frequency of this picture frame signal 2 is the first default renewal frequency 20 (60Hz), judge that namely the picture data that display card institute wish shows is the picture of bidimensional image, further control the first time schedule controller 11 passes into the kenel of picture frame data 2 with data voltage 1020 in the pixel cell 100 according to picture frame clock pulse 110, and it is identical with 110 cycles of picture frame clock pulse to control 12 setting counter-rotating 120 cycles of clock pulse of the second time schedule controller, and according to the reversal of poles of these these data voltages 1020 of counter-rotating clock pulse 120 control, that is, polarity corresponding to each picture frame this moment, in the positive period of data voltage 1020 (positive polarity) and the negative cycle (negative polarity), each only only has a picture frame data.Yet, if control module 13 is judged when the renewal frequency of this picture frame signal 2 is the second default renewal frequency 21 (120Hz), judge that namely the picture data that display card institute wish shows is the picture of 3 D stereoscopic image, so further controlling the first time schedule controller 11 passes into the kenel of picture frame data 2 with data voltage 1020 in the pixel cell 100 according to picture frame clock pulse 110, and control the second time schedule controller 12 and set N times (N is the positive integer greater than 1) that counter-rotating 120 cycles of clock pulse are 110 cycles of picture frame clock pulse, control again the reversal of poles of these data voltages 1020 according to this counter-rotating clock pulse 120, as shown in Figure 4.That is in the present embodiment, become the corresponding polarity of per two picture frames this moment, in the positive period of data voltage 1020 (positive polarity) and the negative cycle (negative polarity), respectively comprised two picture frame data.
Other sees also Fig. 5, the curve map that it discharges and recharges for the picture frame signal of second embodiment of the invention.As shown in the figure, the disclosed content of present embodiment is main only to be from the different of the first embodiment, present embodiment is in the positive period of data voltage 1020 (positive polarity) and negative cycle (negative polarity), three picture frame data have respectively been comprised, in other words, counter-rotating clock pulse 120 is not limited only to the picture frame clock pulse 110 of a times or twice, can be any positive integer of picture frame clock pulse 110 doubly, yet the summation of the magnitude of voltage of the data voltage 1020 in the positive negative cycle of its correspondence need equate, reaching the present invention wanted to finish Dc bias is eliminated, and then eliminate the ghost that occurs when liquid crystal display switches to the two dimensional surface pattern by the 3 D stereo pattern or the phenomenon of flicker.
See also Fig. 6, it is the process flow diagram of the control method of liquid crystal display of the present invention.Among the figure, the display packing of liquid crystal display of the present invention comprises the following step: the renewal frequency that (S1) receives and detect a plurality of picture frame signals; (S2) provide the picture frame signal according to a picture frame clock pulse; (S3) according to the polarity of a counter-rotating clock pulse counter-rotating picture frame signal.Wherein, the counter-rotating clock pulse is N times of picture frame clock pulse, and N is the positive integer greater than 1.
The detailed description of this method just repeats no more at this as aforementioned.Yet, it is worth mentioning that, the present invention is by judging the renewal frequency of the picture frame data that received with the control module, two dimensional surface display mode or 3 D stereo display mode automatically switch, if the 3 D stereo display mode then respectively includes a plurality of picture frame data at the positive negative cycle that passes into the picture frame signal, carry out again reversal of poles, and then can eliminate liquid crystal display and switch back the two dimensional surface pattern from the 3 D stereo pattern time, relative reference magnitude of voltage V
ComFormed Dc bias, the ghost that causes and film flicker phenomenon, make the user after utilizing liquid crystal display of the present invention to watch stereoscopic photograph, play stereo game or seeing three-dimensional film, when switching back General Two-Dimensional plane display mode, do not have uncomfortable flicker picture and produce.
The above only is the preferred embodiments of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive; It will be appreciated by those skilled in the art that in the spirit and scope that claim of the present invention limits and can carry out many changes to it, revise, even the equivalence change, but all will fall within the scope of protection of the present invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010154769 CN102201208B (en) | 2010-03-25 | 2010-03-25 | Liquid crystal display and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010154769 CN102201208B (en) | 2010-03-25 | 2010-03-25 | Liquid crystal display and control method thereof |
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| CN102201208A CN102201208A (en) | 2011-09-28 |
| CN102201208B true CN102201208B (en) | 2013-03-20 |
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| CN 201010154769 Expired - Fee Related CN102201208B (en) | 2010-03-25 | 2010-03-25 | Liquid crystal display and control method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102333231B (en) * | 2011-10-18 | 2013-06-19 | 深圳市华星光电技术有限公司 | Stereopicture displaying method and corresponding stereopicture displaying device |
| CN102395038B (en) * | 2011-11-16 | 2013-09-04 | 深圳市华星光电技术有限公司 | Working method of shutter glass type 3D display |
| CN104952407B (en) * | 2015-06-25 | 2018-01-12 | 南京中电熊猫液晶显示科技有限公司 | The source electrode driver and its driving method of a kind of liquid crystal panel |
| CN107393492A (en) | 2017-08-01 | 2017-11-24 | 惠科股份有限公司 | Driving method of display device, and computer-readable storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1246628A (en) * | 1999-07-16 | 2000-03-08 | 中国科学院合肥智能机械研究所 | Method for displaying field-division stereoscopic vision |
| CN101371292A (en) * | 2006-03-29 | 2009-02-18 | 辉达公司 | System, method, and computer program product for controlling stereo glasses shutters |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000284223A (en) * | 1999-03-30 | 2000-10-13 | Idemitsu Kosan Co Ltd | Stereoscopic display method and stereoscopic display device |
| US8237780B2 (en) * | 2007-10-29 | 2012-08-07 | The Boeing Company | Method and apparatus for 3D viewing |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1246628A (en) * | 1999-07-16 | 2000-03-08 | 中国科学院合肥智能机械研究所 | Method for displaying field-division stereoscopic vision |
| CN101371292A (en) * | 2006-03-29 | 2009-02-18 | 辉达公司 | System, method, and computer program product for controlling stereo glasses shutters |
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| CN102201208A (en) | 2011-09-28 |
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