CN102201208A - Liquid crystal display and control method thereof - Google Patents
Liquid crystal display and control method thereof Download PDFInfo
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- CN102201208A CN102201208A CN 201010154769 CN201010154769A CN102201208A CN 102201208 A CN102201208 A CN 102201208A CN 201010154769 CN201010154769 CN 201010154769 CN 201010154769 A CN201010154769 A CN 201010154769A CN 102201208 A CN102201208 A CN 102201208A
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Abstract
The invention discloses a liquid crystal display and a control method thereof. The display is used for displaying plane images and displaying stereoscopic images by matching with a pair of shutter glasses and comprises a display panel, a first time-sequence controller, a second time-sequence controller and a control module, wherein when a plurality of frame signals are received, the control module controls the first time-sequence controller to access the frame signals to the display panel according to a frame clock rate according to the updating frequencies of the frame signals and controls the second time sequence controller to reverse the polarities of the frame signals according to a reversed clock rate. The period of the reversed clock rate is N times the period of a frame clock rate, wherein N is a positive integer which is greater than 1. By adopting the liquid crystal display and the control method thereof, the phenomena of direct-current image residue and image flicker caused by switching the liquid crystal display from a three-dimensional mode to a two-dimensional mode can be eliminated.
Description
Technical field
The invention relates to a kind of LCD and control method thereof, particularly be used for display plane image and collocation shutter glasses and show the LCD and the control method thereof of stereopsis about a kind of.
Background technology
At present, it has the characteristic of liquid crystal common LCD, 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), some reversal of poles (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 a picture of being responsible for upgrading right eye.Therefore if 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 with the angle of conventional polar driving (Inversion type), when being the positive polarity driving as if the odd number picture of seeing to left eye, the even number picture of seeing to right eye just is necessary for the negative polarity driving.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,, cause the positive-negative half-cycle charging voltage just unequal owing to just exist the difference of GTG for the image of right and left eyes itself; After the stereoscopic three-dimensional picture of a static state shows for a long time, can produce a Dc bias (DC offset), make that in the time of display switchback 2D pattern, the Voltage unbalance that residual Dc bias promptly can cause positive-negative polarity to drive is so the scintillation of screen can take place.
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 LCD and control method thereof, return direct current ghost and the film flicker phenomenon that the two dimensional surface pattern is caused from the 3 D stereo mode switch to solve LCD.
According to purpose of the present invention, a kind of LCD is proposed, be used to show 3-dimensional image, it comprises a display panel, one first time schedule controller, one second time schedule controller and a control die set.First time schedule controller and second time schedule controller electrically connect display panel.Control die set is when receiving a plurality of picture frame signal, control first time schedule controller according to the renewal frequency of a plurality of picture frame signals and the picture frame signal is fed display panel, and control the polarity of second time schedule controller according to a counter-rotating clock pulse counter-rotating picture frame signal according to a picture frame clock pulse.Wherein, the counter-rotating clock pulse cycle is N a 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 LCD, be used 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 die set.Wherein each pixel cell comprises a thin film transistor (TFT), a liquid crystal capacitance and and a storage capacitors, storage capacitors and liquid crystal capacitance parallel connection drain of film transistor.Gate pole driver electrically connects the gate of each thin film transistor (TFT), and a plurality of gate voltage are provided.Source electrode driver electrically connects the source electrode of each thin film transistor (TFT), and a plurality of data voltages are provided.First time schedule controller and second time schedule controller electrically connect and the Controlling Source driver.Control die set is when receiving a plurality of picture frame signal, renewal frequency control grid driver according to the picture frame signal feeds gate voltage, and control first time schedule controller and the picture frame signal is fed pixel cell with a data voltage, and control the polarity of second time schedule controller according to a counter-rotating clock pulse reversal data voltage according to a picture frame 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.
According to purpose of the present invention, a kind of display packing of LCD is proposed again, be used 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 LCD of the present invention and control method thereof, it can have one or more following advantage:
(1) this LCD and control method thereof can be by respectively comprising a plurality of picture frame data at the positive negative cycle that feeds the picture frame signal, carry out reversal of poles again, return direct current ghost and the film flicker phenomenon that the two dimensional surface pattern is caused from the 3 D stereo mode switch and can eliminate LCD.
(2) this LCD and control method thereof can be judged the picture frame data frequency that receives by control die set, and automatically switch two dimensional surface display mode or 3 D stereo display mode are promoted the elasticity on using.
Description of drawings
The curve map that Fig. 1 discharges and recharges for existing picture frame signal;
Fig. 2 is the calcspar of LCD of the present invention;
Fig. 3 is the circuit diagram of LCD 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 LCD of the present invention.
[primary clustering symbol description]
1: LCD; 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: control die set; 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 LCD of the present invention.As shown in the figure, LCD 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 die set 13, and display panel 10 more comprises a plurality of pixel cells 100, a gate pole driver 101 and one source pole driver 102.First time schedule controller 11 and second time schedule controller 12 electrically connect display panel 10, and the start of control display panel 10.Control die set 13 electrically connects first time schedule controller 11 and 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 first time schedule controller 11 according to picture frame signal 2 feeds display panel 10 with a picture frame clock pulse 110 with picture frame signal 2 and shows, and controls the polarity of second time schedule controller 12 with a counter-rotating clock pulse 120 counter-rotating picture frame signals 2.Wherein, the counter-rotating clock pulse cycle is N a 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 die set 13 controls 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 die set 13 is more controlled 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 LCD of the present invention.As shown in the figure, it is the equivalent electrical circuit of this LCD 1 full wafer panel, each pixel cell 100 is a display dot 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 electrically connects the gate of each thin film transistor (TFT) 1000, and a plurality of gate voltage 1010 are provided.102 source electrodes that electrically connect each thin film transistor (TFT) 1000 of source electrode driver, and a plurality of data voltages 1020 are provided.In addition, first time schedule controller 11 and second time schedule controller 12 further electrically connect and Controlling Source driver 102.13 of control die set electrically connect gate pole driver 101, first time schedule controller 11 and 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 feeds gate voltage 1010, to open each thin film transistor (TFT) 1000 in regular turn, and control first time schedule controller 11 and according to picture frame clock pulse 110 picture frame signal 2 is fed pixel cells 100, control the polarity of second time schedule controller 12 again according to counter-rotating clock pulse 120 counter-rotating picture frame signals 2.
The default renewal frequency of the bidimensional image picture that general LCD 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 a picture of being responsible for upgrading right eye, on the practice, by the demonstration picture element Alternation Display left eye picture and the right eye picture of LCD.The data of its picture are sent the picture frame signal of different frequency to LCD 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 LCD, but if 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 LCD.
So control die set 13 is when receiving picture frame signal 2, the renewal frequency of at first just detecting and recognize this picture frame signal 2 earlier is the first default renewal frequency 20 (60Hz) or the second default renewal frequency 21 (120Hz).If control die set 13 is judged when the renewal frequency of these picture frame signals 2 is the first default renewal frequency 20 (60Hz), judge that promptly display card desires the picture that the picture displayed data are bidimensional image, further control first time schedule controller 11 feeds 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 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, the corresponding different polarity of each picture frame this moment, in the positive period of data voltage 1020 (positive polarity) and the negative cycle (negative polarity), each only has only a picture frame data.Yet, if control die set 13 is judged when the renewal frequency of these picture frame signals 2 is the second default renewal frequency 21 (120Hz), judge that promptly display card desires the picture that the picture displayed data are 3 D stereoscopic image, so further control first time schedule controller 11 feeds 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 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 the reversal of poles of these data voltages 1020 again 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 with the different of first embodiment, present embodiment is in 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, the any positive integer that can be 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 desired to finish Dc bias is eliminated, and then eliminate the ghost that taken place when LCD is the two dimensional surface pattern by the 3 D stereo mode switch or the phenomenon of flicker.
See also Fig. 6, it is the process flow diagram of the control method of LCD of the present invention.Among the figure, the display packing of LCD 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 a 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, what deserves to be mentioned is, the present invention is by judging the renewal frequency of the picture frame data that received with control die set, 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 feeds the picture frame signal, carry out reversal of poles again, and then can eliminate LCD when the 3 D stereo mode switch is returned the two dimensional surface pattern, relative reference magnitude of voltage V
ComFormed Dc bias, ghost that causes and film flicker phenomenon, make the user after utilizing LCD 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 limit in claim of the present invention and can carry out many changes, revise it, even the equivalence change, but all will fall within the scope of protection of the present invention.
Claims (10)
1. a LCD is used to show 3-dimensional image, it is characterized in that, described LCD comprises:
One display panel is in order to show image;
One first time schedule controller electrically connects described display panel;
One second time schedule controller electrically connects described display panel; And
One control die set, after receiving a plurality of picture frame signals, control described first time schedule controller according to the renewal frequency of described a plurality of picture frame signals and described a plurality of picture frame signals are fed described display panel, and control described second time schedule controller according to the reverse polarity of described a plurality of picture frame signals of a counter-rotating clock pulse according to a picture frame 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.
2. LCD as claimed in claim 1, it is characterized in that, when the renewal frequency that detects described a plurality of picture frame signals when described control die set is one first default renewal frequency, described control die set is promptly controlled described second time schedule controller, and to set the described counter-rotating clock pulse cycle identical with the described picture frame clock pulse cycle, and have the polarity of a plurality of picture frame signals of described first renewal frequency according to described counter-rotating clock pulse counter-rotating; Wherein, described display panel shows bidimensional image according to a plurality of picture frame signals with described first default renewal frequency.
3. LCD as claimed in claim 2, it is characterized in that, when the renewal frequency that detects described a plurality of picture frame signals when described control die set is one second default renewal frequency, described control die set is promptly controlled described second time schedule controller N that to set the described counter-rotating clock pulse cycle be the described picture frame clock pulse cycle doubly, and has the polarity of a plurality of picture frame signals of described second renewal frequency according to described counter-rotating clock pulse counter-rotating; Wherein, described display panel is according to a plurality of picture frame signals with described second default renewal frequency, and cooperates a shutter glasses and show 3-dimensional image, and the described first default renewal frequency is less than the described second default renewal frequency.
4. LCD as claimed in claim 3, it is characterized in that, a plurality of picture frame signals with described second default renewal frequency comprise a plurality of left eye picture frame signals and a plurality of right eye picture frame signal, and described a plurality of left eye picture frame signal and right eye picture frame signal are imported described display panel with interlace mode.
5. LCD is used to show bidimensional image or cooperates a shutter glasses and show 3-dimensional image, it is characterized in that described LCD comprises:
A plurality of pixel cells, each pixel cell comprise a thin film transistor (TFT), a liquid crystal capacitance and a storage capacitors, described storage capacitors and liquid crystal capacitance described drain of film transistor in parallel;
One gate pole driver electrically connects the gate of described each thin film transistor (TFT), and a plurality of gate voltage is provided;
The one source pole driver electrically connects the source electrode of described each thin film transistor (TFT), and a plurality of data voltages is provided;
One first time schedule controller electrically connects and controls described source electrode driver;
One second time schedule controller electrically connects and controls described source electrode driver; And
One control die set, electrically connect described gate pole driver, described first time schedule controller and second time schedule controller, when receiving a plurality of picture frame signal, control described gate pole driver according to the renewal frequency of described a plurality of picture frame signals and feed described a plurality of gate voltage, and control described first time schedule controller and described a plurality of picture frame signals are fed described a plurality of pixel cell with described a plurality of data voltages, and control described second time schedule controller according to the reverse polarity of described a plurality of data voltages of a counter-rotating clock pulse according to a picture frame 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.
6. LCD as claimed in claim 5, it is characterized in that, when the renewal frequency that detects described a plurality of picture frame signals when described control die set is one first default renewal frequency, described control die set is promptly controlled described second time schedule controller, and to set the described counter-rotating clock pulse cycle identical with the described picture frame clock pulse cycle, and according to described counter-rotating clock pulse counter-rotating has the polarity of a plurality of picture frame signals of described first renewal frequency, make described liquid crystal display displays bidimensional image.
7. LCD as claimed in claim 6, it is characterized in that, when the renewal frequency that detects described a plurality of picture frame signals when described control die set is one second default renewal frequency, described control die set is promptly controlled described second time schedule controller N that to set the described counter-rotating clock pulse cycle be the described picture frame clock pulse cycle doubly, and counter-rotating has the polarity of a plurality of picture frame signals of described second renewal frequency according to described counter-rotating clock pulse, makes described LCD arrange in pairs or groups described shutter glasses and shows 3-dimensional image; Wherein, the described first default renewal frequency is less than the described second default renewal frequency.
8. the control method of a LCD is used to control a liquid crystal display displays bidimensional image or arranges in pairs or groups a shutter glasses and show 3-dimensional image, it is characterized in that described method comprises the following step:
Receive and detect the renewal frequency of a plurality of picture frame signals;
Provide described a plurality of picture frame signal according to a picture frame clock pulse; And
According to 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.
9. the control method of LCD as claimed in claim 8, it is characterized in that, when the renewal frequency of described a plurality of picture frame signals is one first default renewal frequency, promptly setting the described counter-rotating clock pulse cycle is same as the described picture frame clock pulse cycle, and have the polarity of a plurality of picture frame signals of described first renewal frequency according to described counter-rotating clock pulse counter-rotating, and then make described liquid crystal display displays bidimensional image.
10. the control method of LCD as claimed in claim 9, it is characterized in that, when the renewal frequency of described a plurality of picture frame signals is one second default renewal frequency, promptly with greater than a times of described picture frame clock pulse as described counter-rotating clock pulse, and counter-rotating has the polarity of a plurality of picture frame signals of described second renewal frequency according to described counter-rotating clock pulse, and then makes described LCD cooperate described shutter glasses and show 3-dimensional image; Wherein, the described first default renewal frequency is less than the described second default renewal frequency.
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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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| CN102395038A (en) * | 2011-11-16 | 2012-03-28 | 深圳市华星光电技术有限公司 | Working method of shutter glass type 3D display |
| WO2013056475A1 (en) * | 2011-10-18 | 2013-04-25 | 深圳市华星光电技术有限公司 | 3d image display method and corresponding 3d image display device |
| CN104952407A (en) * | 2015-06-25 | 2015-09-30 | 南京中电熊猫液晶显示科技有限公司 | Source driver of liquid crystal panel as well as drive method of source driver |
| CN107393492A (en) * | 2017-08-01 | 2017-11-24 | 惠科股份有限公司 | Driving method, display device and the computer-readable recording medium of display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013056475A1 (en) * | 2011-10-18 | 2013-04-25 | 深圳市华星光电技术有限公司 | 3d image display method and corresponding 3d image display device |
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| 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, display device and the computer-readable recording medium of display device |
| WO2019024374A1 (en) * | 2017-08-01 | 2019-02-07 | 惠科股份有限公司 | Display apparatus drive method, display apparatus, and computer readable storage medium |
| US11227560B2 (en) | 2017-08-01 | 2022-01-18 | HKC Corporation Limited | Method for driving display device in a two- or three-dimensional display device, and computer-readable storage medium |
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