CN102938243A - Liquid crystal display equipment driving method and liquid crystal display equipment - Google Patents
Liquid crystal display equipment driving method and liquid crystal display equipment Download PDFInfo
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- CN102938243A CN102938243A CN2012104224318A CN201210422431A CN102938243A CN 102938243 A CN102938243 A CN 102938243A CN 2012104224318 A CN2012104224318 A CN 2012104224318A CN 201210422431 A CN201210422431 A CN 201210422431A CN 102938243 A CN102938243 A CN 102938243A
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Abstract
The embodiment of the invention discloses a liquid crystal display equipment driving method and equipment, relates to the technical field of liquid crystal, and solves the problems that various poor phenomena on a picture are caused by overshoot of introduction in a process of shortening responding time of a liquid crystal through OD (Over Driving). The method comprises the following steps of: utilizing over-driving voltage to drive liquid crystal molecules to overturn, wherein the over-driving voltage is higher than a regular driving voltage value; before overturning the liquid crystal molecules to an appointed position, at least reducing the value of the over-driving voltage once until the liquid crystal molecules are overturned to the appointed position, wherein the over-driving voltage which is reduced for each time is higher or equal to the regular driving voltage value and is lower than an over-driving voltage value before value reduction. The liquid crystal display equipment driving method is mainly used for driving the liquid crystal display equipment.
Description
Technical field
The present invention relates to the liquid crystal technology field, relate in particular to drive method of liquid crystal display and liquid crystal display.
Background technology
Liquid crystal molecule, as the metal in magnetic field, when being subject to external electrical field and affecting, can produce accurate ordered arrangement, if to the arrangement of liquid crystal molecule suitable control in addition, liquid crystal molecule will be controlled light and pass through.No matter be notebook computer or desktop system, the hierarchy that the LCD of employing (Liquid Crystal Display, LCDs) is comprised of different piece.Be positioned at that rearmost one deck is comprised of fluorescent material can emission of light backlight layer, the light that backlight layer is sent is entering through after the ground floor polarization filter layer liquid crystal layer that comprises thousands of crystal drops, crystal drop in liquid crystal layer all is comprised in tiny cell structure, and one or more cells form a pixel on screen.When the electrode in LCD produces electric field, liquid crystal molecule will produce distortion, thereby the light that will pass through wherein carries out well-regulated refraction, and then the filtration through second layer filtering layer shows on screen.
But LCD adopts stable state display mode (hold type) usually, the speed changed due to liquid crystal molecule is less than the speed that electric field changes, therefore, LCD needs certain response time just can reach object brightness, can not meet actual demand, so need to improve the response speed of liquid crystal.
The response speed that shortens liquid crystal can adopt OD(over driving, overdrive) this method, the OD principle as shown in Figure 1, curve 1 is normal liquid crystal response process, response slowly, in order to accelerate the response of liquid crystal, is brought up to a high driving voltage of the conventional driving voltage of ratio by the driving voltage of liquid crystal, as shown in curve in Fig. 12, thereby make liquid crystal can reach desired location at short notice.
As can be seen from Figure 1, although OD has shortened the response time of liquid crystal, but also introduced an overshoot simultaneously, this overshoot meeting causes picture multiple bad, as the problems such as bright, colour cast appearred in: motion picture edge, so just produce a contradiction, shortened the response time of liquid crystal and the contradiction of overshoot effect image quality.
Summary of the invention
Embodiments of the invention provide a kind of drive method of liquid crystal display and equipment, have solved when by OD, shortening the response time of liquid crystal, and the overshoot of introducing causes the multiple problem such as bad of picture.
For achieving the above object, embodiments of the invention adopt following technical scheme:
On the one hand, a kind of drive method of liquid crystal display comprises:
Adopted and drive the upset of voltage driving liquid crystal molecule, described mistake is driven voltage higher than conventional driving voltage value;
Before liquid crystal molecule is turned to assigned address, described mistake is driven to voltage, and at least depreciation is once, until liquid crystal molecule is turned to described assigned address, the mistake after each depreciation is driven voltage greater than or equal to described conventional driving voltage value, but drives magnitude of voltage lower than the mistake before depreciation.
Further, described described mistake is driven voltage at least depreciation once before, described method also comprises:
Determine according to the characteristic of liquid crystal panel the number of times that described mistake is driven to voltage drop value.
Further, the described characteristic according to liquid crystal panel determines that the number of times that described mistake is driven to voltage drop value is: according to the time that discharges and recharges, the response speed of liquid crystal panel, determine the number of times that described mistake is driven to voltage drop value.
Further, to drive the each depreciation of voltage identical for described mistake; Perhaps, it is identical that described mistake is driven the each depreciation ratio of voltage, or described mistake is driven voltage at every turn according to the preset ratio depreciation.
Further, described assigned address is: liquid crystal molecule complete upset 30%～70% the time.
Further, to drive voltage be to equal 1.5 times of described conventional driving voltage to the mistake before described step-down.
On the other hand, a kind of liquid crystal display comprises:
Cross and drive unit, for adopting, drove the upset of voltage driving liquid crystal molecule, described mistake is driven voltage higher than conventional driving voltage value;
Cross and drive voltage control unit, for before liquid crystal molecule is turned to assigned address, described mistake is driven to voltage, and at least depreciation is once, until liquid crystal molecule is turned to described assigned address, mistake after each depreciation is driven voltage greater than or equal to described conventional driving voltage value, but drives magnitude of voltage lower than the mistake before depreciation.
Further, also comprise:
Computing unit, determine the number of times that described mistake is driven to voltage drop value for the characteristic according to liquid crystal panel.
Further, described computing unit determines that according to the characteristic of liquid crystal panel the number of times that described mistake is driven to voltage drop value is: described computing unit determines according to the time that discharges and recharges, the response speed of liquid crystal panel the number of times that described mistake is driven to voltage drop value.
Further, to drive the each depreciation of voltage identical for described mistake; Perhaps, it is identical that described mistake is driven the each depreciation ratio of voltage, or described mistake is driven voltage at every turn according to the preset ratio depreciation.
Further, described assigned address is: liquid crystal molecule complete upset 30%～70% the time.
Further, to drive voltage be to equal 1.5 times of described conventional driving voltage to the mistake before described step-down.
The drive method of liquid crystal display that the embodiment of the present invention provides and equipment, for shortening the response time of liquid crystal molecule, at first, adopted and drove the upset of voltage driving liquid crystal molecule, and described mistake is driven voltage higher than conventional driving voltage value; In order to reduce the impact of spike, before liquid crystal molecule is turned to assigned address, by described mistake drive voltage at least depreciation once, until liquid crystal molecule is turned to described assigned address, mistake after each depreciation is driven voltage higher than described conventional driving voltage value, but drives magnitude of voltage lower than the mistake before depreciation.After excessively driving the magnitude of voltage variation, liquid crystal starts to respond comparatively slowly, thereby eliminates original spike, but the whole response time still is less than the flip-flop transition of liquid crystal molecule under conventional voltage.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is in prior art, crosses and drives the impact of voltage on the liquid crystal molecule upset;
The process flow diagram that Fig. 2 is a kind of drive method of liquid crystal display in the embodiment of the present invention;
Fig. 3 crosses in the embodiment of the present invention to drive the impact of voltage on the liquid crystal molecule upset;
The structural drawing that Fig. 4 is a kind of liquid crystal display in the embodiment of the present invention;
The process flow diagram that Fig. 5 is another kind of drive method of liquid crystal display in the embodiment of the present invention;
The structural drawing that Fig. 6 is another kind of liquid crystal display in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
Illustrated in Fig. 1 to use and driven voltage the liquid crystal display picture is driven into the process of another brightness from a brightness, the upset situation of liquid crystal molecule, as can be seen from the figure, after having used mistake to drive voltage, the upset response time of liquid crystal molecule has shortened a lot.
Although cross, drive the response time that voltage has shortened liquid crystal molecule,, to cross and to drive voltage and brought spike for the driving of liquid crystal molecule, this spike also can cause the bad demonstration of picture simultaneously, the problems such as bright, colour cast occur as the motion picture edge.
When in order to solve, by OD, shortening the response time of liquid crystal, the overshoot of introducing causes the multiple problem such as bad of picture, the invention provides following examples.
The embodiment of the present invention provides a kind of drive method of liquid crystal display, as shown in Figure 2, comprising:
201, adopted and drive the upset of voltage driving liquid crystal molecule, described mistake is driven voltage higher than conventional driving voltage value.
For shortening the response time, apply a mistake that surpasses conventional magnitude of voltage at first to the liquid crystal molecule and drive voltage, make liquid crystal molecule respond fast beginning.As shown in curve in Fig. 33, the response speed of liquid crystal molecule upset is greater than the response speed of using original OD.
202, before liquid crystal molecule is turned to assigned address, described mistake is driven to voltage, and at least depreciation is once, until liquid crystal molecule is turned to described assigned address, the mistake after each depreciation is driven voltage greater than or equal to described conventional driving voltage value, but drives magnitude of voltage lower than the mistake before depreciation.
But larger like this mistake is driven voltage, can cause larger spike, this spike can have a strong impact on image quality.In order to reduce the impact of spike, before liquid crystal molecule is not turned to assigned address, reduced to drive magnitude of voltage, made to drive voltage and become the voltage greater than or equal to conventional driving voltage value, as shown in the curve 4 in Fig. 3, as can be seen here, after excessively driving the magnitude of voltage variation, liquid crystal molecule starts the response of overturning comparatively slowly, thereby reduces original spike, and then reduce the impact of spike for image quality, but the whole response time is still higher than flip-flop transition of liquid crystal molecule under conventional voltage.It should be noted that, mistake after last step-down is driven voltage can be higher than conventional driving voltage value, now need to control the scanning that liquid crystal molecule finishes this frame when turning to conventional driving voltage value, and finish the scanning of this frame while can not the mistake after liquid crystal molecule turn to last step-down driving magnitude of voltage, if the mistake after last step-down is driven voltage and equaled conventional driving voltage value, need to when turning to this and drive magnitude of voltage, just finish liquid crystal molecule the scanning of this frame.
The drive method of liquid crystal display that the present embodiment provides, for shortening the response time of liquid crystal molecule, at first, adopted and drove the upset of voltage driving liquid crystal molecule, and described mistake is driven voltage higher than conventional driving voltage value; In order to reduce the impact of spike, before liquid crystal molecule is turned to assigned address, described mistake is driven to voltage, and at least depreciation is once, until liquid crystal molecule is turned to described assigned address, mistake after each depreciation is driven voltage greater than or equal to described conventional driving voltage value, but drives magnitude of voltage lower than the mistake before depreciation.After excessively driving the magnitude of voltage variation, liquid crystal starts to respond comparatively slowly, thereby eliminates original spike, but the whole response time still is less than the flip-flop transition of liquid crystal molecule under conventional voltage.
In order to realize above-mentioned drive method of liquid crystal display, the embodiment of the present invention provides a kind of liquid crystal display, as shown in Figure 4, comprising:
Cross and drive unit 41, for adopting, drove the upset of voltage driving liquid crystal molecule, described mistake is driven voltage higher than conventional driving voltage value;
Cross and drive voltage control unit 42, for before liquid crystal molecule is turned to assigned address, described mistake is driven to voltage, and at least depreciation is once, until liquid crystal molecule is turned to described assigned address, mistake after each depreciation is driven voltage greater than or equal to described conventional driving voltage value, but drives magnitude of voltage lower than the mistake before depreciation.
The liquid crystal display that the present embodiment provides, be to shorten response time of liquid crystal molecule, at first, crosses and drive unit and adopted and drive voltage driving liquid crystal molecule and overturn, and described mistake is driven voltage higher than conventional driving voltage value; In order to reduce the impact of spike, cross and drove voltage control unit before liquid crystal molecule is turned to assigned address, described mistake is driven to voltage, and at least depreciation is once, until liquid crystal molecule is turned to described assigned address, mistake after each depreciation is driven voltage greater than or equal to described conventional driving voltage value, but drives magnitude of voltage lower than the mistake before depreciation.After excessively driving the magnitude of voltage variation, liquid crystal starts to respond comparatively slowly, thereby eliminates original spike, but the whole response time still is less than the flip-flop transition of liquid crystal molecule under conventional voltage.
As the improvement of above-described embodiment, the embodiment of the present invention provides another kind of drive method of liquid crystal display, as shown in Figure 5, comprising:
501, adopted and drove the upset of voltage driving liquid crystal molecule, and crossed and drive voltage higher than conventional driving voltage value.
For shortening the response time, apply a mistake that surpasses conventional magnitude of voltage at first to the liquid crystal molecule and drive voltage, make liquid crystal molecule respond fast beginning.As shown in curve in Fig. 33, the response speed of liquid crystal molecule upset is greater than the response speed of using original OD.
Preferably, to drive voltage be to equal 1.5 times of described conventional driving voltage to the mistake before described depreciation.The present embodiment technical scheme is when practical application, and due to the characteristic differences such as response speed of the liquid crystal of different liquid crystal itself, the mistake that also can select other numerical value according to characteristic and the actual needs of liquid crystal panel is driven voltage, does not repeat them here.
502, determine according to the characteristic of liquid crystal panel the number of times that described mistake is driven to voltage drop value.
Concrete, can determine the number of times that described mistake is driven to voltage drop value according to the time that discharges and recharges, the response speed of liquid crystal panel.The embodiment of the present invention is not specifically limited for crossing the account form of driving the voltage drop value number of times, can be also that the present embodiment is NM, but alternate manner well-known to those skilled in the art.
503, before liquid crystal molecule is turned to assigned address, described mistake is driven to voltage, and at least depreciation is once, until liquid crystal molecule is turned to described assigned address, the mistake after each depreciation is driven voltage greater than or equal to described conventional driving voltage value, but drives magnitude of voltage lower than the mistake before depreciation.
But larger like this mistake is driven voltage, can cause larger spike, this spike can have a strong impact on image quality.In order to reduce the impact of spike, before liquid crystal molecule is not turned to assigned address, reduced to drive magnitude of voltage, made to drive voltage and become the voltage greater than or equal to conventional driving voltage value, as shown in the curve 4 in Fig. 3, as can be seen here, after excessively driving the magnitude of voltage variation, liquid crystal molecule starts the response of overturning comparatively slowly, thereby reduces original spike, and then reduce the impact of spike for image quality, but the whole response time still is less than the flip-flop transition of liquid crystal molecule under conventional voltage.It should be noted that, mistake after last step-down is driven voltage can be higher than conventional driving voltage value, now need to control the scanning that liquid crystal molecule finishes this frame when turning to conventional driving voltage value, and finish the scanning of this frame while can not the mistake after liquid crystal molecule turn to last step-down driving magnitude of voltage, if the mistake after last step-down is driven voltage and equaled conventional driving voltage value, need to when turning to this and drive magnitude of voltage, just finish liquid crystal molecule the scanning of this frame.
Preferably, to drive the each depreciation of voltage identical for described mistake; Perhaps, it is identical that described mistake is driven the each depreciation ratio of voltage, or described mistake is driven voltage at every turn according to the preset ratio depreciation.The embodiment of the present invention is not specifically limited for the account form of crossing the numerical value that drives the each depreciation of voltage, can be also that the present embodiment is NM, but alternate manner well-known to those skilled in the art.
Preferably, assigned address in the present embodiment be liquid crystal molecule complete upset 30%～70% the time, because more early carrying out driving the depreciation of voltage, to reduce the effect of spike better, the more late depreciation that carried out driving voltage response time of liquid crystal molecule shorter, most of liquid crystal panels carried out driving being down to of voltage at the assigned address of this scope can guarantee that liquid crystal molecule more effectively reduces spike under the prerequisite of response fast, concrete position need to be according to the characteristic of liquid crystal panel, such as the response speed of liquid crystal itself etc., determines.The embodiment of the present invention is not specifically limited for crossing the execution of driving voltage drop value opportunity, can be also that the present embodiment is NM, but other opportunity that those skilled in the art determine according to actual conditions.
The drive method of liquid crystal display that the present embodiment provides, for shortening the response time of liquid crystal molecule, at first, adopted and drove the upset of voltage driving liquid crystal molecule, and described mistake is driven voltage higher than conventional driving voltage value; In order to reduce the impact of spike, before liquid crystal molecule is turned to assigned address, by described mistake drive voltage at least depreciation once, until liquid crystal molecule is turned to described assigned address, mistake after each depreciation is driven voltage higher than described conventional driving voltage value, but drives magnitude of voltage lower than the mistake before depreciation.After excessively driving the magnitude of voltage variation, liquid crystal starts to respond comparatively slowly, thereby eliminates original spike, but the whole response time still is less than the flip-flop transition of liquid crystal molecule under conventional voltage.
For the drive method of liquid crystal display after realizing improving, the embodiment of the present invention provides another kind of liquid crystal display, as shown in Figure 6, comprising:
Cross and drive unit 61, for adopting, drove the upset of voltage driving liquid crystal molecule, described mistake is driven voltage higher than conventional driving voltage value;
Preferably, to drive voltage be to equal 1.5 times of described conventional driving voltage to the mistake before described depreciation.
Concrete, described computing unit can be determined the number of times that described mistake is driven to voltage drop value according to the time that discharges and recharges, the response speed of liquid crystal panel.
Cross and drive voltage control unit 63, for before liquid crystal molecule is turned to assigned address, described mistake is driven to voltage, and at least depreciation is once, until liquid crystal molecule is turned to described assigned address, mistake after each depreciation is driven voltage greater than or equal to described conventional driving voltage value, but drives magnitude of voltage lower than the mistake before depreciation.
Preferably, to drive the each depreciation of voltage identical for described mistake; Perhaps, it is identical that described mistake is driven the each depreciation ratio of voltage, or described mistake is driven voltage at every turn according to the preset ratio depreciation.
Preferably, described assigned address is: liquid crystal molecule complete upset 30%～70% the time.
The liquid crystal display that the present embodiment provides, be to shorten response time of liquid crystal molecule, at first, crosses and drive unit and adopted and drive voltage driving liquid crystal molecule and overturn, and described mistake is driven voltage higher than conventional driving voltage value; In order to reduce the impact of spike, cross and drove voltage control unit before liquid crystal molecule is turned to assigned address, described mistake is driven to voltage, and at least depreciation is once, until liquid crystal molecule is turned to described assigned address, mistake after each depreciation is driven voltage higher than described conventional driving voltage value, but drives magnitude of voltage lower than the mistake before depreciation.After excessively driving the magnitude of voltage variation, liquid crystal starts to respond comparatively slowly, thereby eliminates original spike, but the whole response time still is less than the flip-flop transition of liquid crystal molecule under conventional voltage.
Through the above description of the embodiments, the those skilled in the art can be well understood to the mode that the present invention can add essential common hardware by software and realize, can certainly pass through hardware, but in a lot of situation, the former is better embodiment.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium can read, floppy disk as computing machine, hard disk or CD etc., comprise some instructions with so that computer equipment (can be personal computer, server, or the network equipment etc.) carry out the described method of each embodiment of the present invention.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by the described protection domain with claim.
Claims (12)
1. a drive method of liquid crystal display, is characterized in that, comprising:
Adopted and drive the upset of voltage driving liquid crystal molecule, described mistake is driven voltage higher than conventional driving voltage value;
Before liquid crystal molecule is turned to assigned address, described mistake is driven to voltage, and at least depreciation is once, until liquid crystal molecule is turned to described assigned address, the mistake after each depreciation is driven voltage greater than or equal to described conventional driving voltage value, but drives magnitude of voltage lower than the mistake before depreciation.
2. method according to claim 1, is characterized in that, described described mistake is driven voltage at least depreciation once before, described method also comprises:
Determine according to the characteristic of liquid crystal panel the number of times that described mistake is driven to voltage drop value.
3. method according to claim 2, is characterized in that, the described characteristic according to liquid crystal panel determines that the number of times that described mistake is driven to voltage drop value is: according to the time that discharges and recharges, the response speed of liquid crystal panel, determine the number of times that described mistake is driven to voltage drop value.
4. according to the described method of any one in claims 1 to 3, it is characterized in that, it is identical that described mistake is driven the each depreciation of voltage; Perhaps, it is identical that described mistake is driven the each depreciation ratio of voltage, or described mistake is driven voltage at every turn according to the preset ratio depreciation.
5. according to the described method of any one in claims 1 to 3, it is characterized in that, described assigned address is: liquid crystal molecule complete upset 30%～70% the time.
6. according to the described method of any one in claims 1 to 3, it is characterized in that, it is to equal 1.5 times of described conventional driving voltage that the mistake before described step-down is driven voltage.
7. a liquid crystal display, is characterized in that, comprising:
Cross and drive unit, for adopting, drove the upset of voltage driving liquid crystal molecule, described mistake is driven voltage higher than conventional driving voltage value;
Cross and drive voltage control unit, for before liquid crystal molecule is turned to assigned address, described mistake is driven to voltage, and at least depreciation is once, until liquid crystal molecule is turned to described assigned address, mistake after each depreciation is driven voltage greater than or equal to described conventional driving voltage value, but drives magnitude of voltage lower than the mistake before depreciation.
8. equipment according to claim 7, is characterized in that, also comprises:
Computing unit, determine the number of times that described mistake is driven to voltage drop value for the characteristic according to liquid crystal panel.
9. equipment according to claim 8, it is characterized in that, described computing unit determines that according to the characteristic of liquid crystal panel the number of times that described mistake is driven to voltage drop value is: described computing unit determines according to the time that discharges and recharges, the response speed of liquid crystal panel the number of times that described mistake is driven to voltage drop value.
10. according to the described equipment of any one in claim 7 to 9, it is characterized in that, it is identical that described mistake is driven the each depreciation of voltage; Perhaps, it is identical that described mistake is driven the each depreciation ratio of voltage, or described mistake is driven voltage at every turn according to the preset ratio depreciation.
11. according to the described equipment of any one in claim 7 to 9, it is characterized in that, described assigned address is: liquid crystal molecule complete upset 30%～70% the time.
12. according to the described equipment of any one in claim 7 to 9, it is characterized in that, it is to equal 1.5 times of described conventional driving voltage that the mistake before described step-down is driven voltage.
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| CN2012104224318A CN102938243A (en) | 2012-10-29 | 2012-10-29 | Liquid crystal display equipment driving method and liquid crystal display equipment |
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| CN105448256A (en) * | 2015-12-22 | 2016-03-30 | 昆山龙腾光电有限公司 | Liquid crystal display device and driving method thereof |
| CN105717676A (en) * | 2016-04-27 | 2016-06-29 | Tcl显示科技（惠州）有限公司 | Method for shortening IPS (in-plane switching) screen flicker and equipment with IPS screen |
| CN114563884A (en) * | 2022-02-25 | 2022-05-31 | 南方科技大学 | Segmented driving method for fast response of nematic liquid crystal molecules |
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| CN105448256A (en) * | 2015-12-22 | 2016-03-30 | 昆山龙腾光电有限公司 | Liquid crystal display device and driving method thereof |
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Application publication date: 20130220 |