Liquid crystal display device and its driving method
A technology of liquid crystal display and driving method, which is applied in the field of liquid crystal display and its driving, and can solve the problem that the smear phenomenon cannot be effectively improved and the like
Active Publication Date: 2008-02-20
INNOLUX CORP
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Therefore, after evaluating the above three parameters of dynamic image response curve MPRC, blur width BEW and dynamic response time MPRT, it will be found that the smear phenomenon cannot be effectively improved
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[0033] In order to effectively improve the smear phenomenon generated when the dynamic image changes, the present invention properly controls the lighting time of the backlight module and correspondingly adjusts the overdrive data in the overdrive look-up table to change the overdrive voltage input to the pixel , so that the liquid crystal display can have a better picture performance.
[0034] Please refer to FIG. 2 and FIG. 3 , which are schematic diagrams of a liquid crystal display according to a preferred embodiment of the present invention. The liquid crystal display 20 includes a liquid crystal display panel 210 , a backlight module 220 , a storage unit 230 and a driving circuit 240 . The liquid crystal display panel 210 includes a plurality of pixels 212, and the backlight module 220 also includes a plurality of light emitting elements 222. The light emitting elements 222 are, for example, cold cathode fluorescent lamps (Cold Cathode Fluorescent Lamp, CCFL) or light em...
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The utility model discloses an LCD and a driving method for the LCD, which comprises a liquid crystal display panel and a scanning backlight module group; wherein, the liquid crystal display panel has a plurality of pixels and the scanning backlight module group comprises a plurality of luminous elements. First, one of the luminous elements is driven periodically with the period of one picture time. Then, the luminous elements are driven and made to achieve the highest backlight brightness at a first time. Finally, over driving voltage is input to the pixels of the LCD corresponding to the luminous elements; the pixels are driven by the over driving voltage to achieve the termination of the charge time at a second time so that the pixels transform from a beginning picture brightness to a target picture brightness at a third time. The first time, the second time and the third time are three different time points. By properly adjusting the over driving data in the scanning over driving lookup table to improve the smear phenomena and the double edge phenomena; thereby, the LCD has the advantages of better image performance and improved video response time.
Description
technical field [0001] The present invention relates to a liquid crystal display and its driving method, and in particular to a liquid crystal display and its driving method which can improve the smear phenomenon. Background technique [0002] When the dynamic image on the liquid crystal display changes, the human eye will feel that the image is smeared due to the persistence of vision. In order to improve this situation, the industry mostly uses the Motion Picture Response Curve (MPRC), Blur Edge Width (BEW) and Motion Picture Response Time (MPRT) to evaluate the improvement of the smear phenomenon . [0003] Please refer to FIG. 1A and FIG. 1B at the same time. FIG. 1A is a display screen of a liquid crystal display. FIG. 1B is a dynamic image response curve diagram corresponding to FIG. 1A . The dynamic image response curve MPRC is the brightness distribution curve of the animation edge. When the dynamic image response curve MPRC is steeper, it means that the animation...
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IPC IPC(8): G09G3/36G09G3/20G02F1/133
Inventor 石清文林弘裕陈宥烨
Owner INNOLUX CORP