Drive device and drive method for reducing luminance nonuniformity of LCD device
A technology for liquid crystal display devices and uneven luminance, applied to static indicators, cathode ray tube indicators, instruments, etc., can solve the problems of compensation time point and pulse width limitation, achieve compensation loss and reduce power consumption , the effect of accurate loss
Active Publication Date: 2011-03-23
SITRONIX TECH CORP
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However, its disadvantage is that two additional compensation potentials V2' and V4' are required in the power supply system, and each switch group 1442 of the drive output circuit 144 in front of the data electrodes X1, X2 will have two more sets of switches (such as Figure 8 shown)
Moreover, the gray scale of LCDs is mostly realized by using pulse width modulation (PWM). If the above compensation method is used, the compensation time point and pulse width are limited accordingly.
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[0027] The following is the detailed content and technical description of the present invention, which will be further described by examples, but it should be understood that these examples are only for illustrative purposes, and should not be construed as limitations on the implementation of the present invention.
[0028] see Figure 9 As shown, it is a structural block diagram of the data electrode driver of the present invention. Taking the potential generator to generate five potentials such as V1, V2, V3, V4, and V5 as an example, the data electrode driver 34 of the present invention includes a latch temporary storage circuit 341, a switch control circuit 342, a detection and counting circuit 345, and a potential A shifter 343 and a drive output circuit 344 . The latch temporary storage circuit 341 temporarily stores the display data transmitted to the data electrode driver 34 row by row through each horizontal synchronization signal and sends it to the switch control c...
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The invention relates to a driving device for reducing nonuniform brightness of a liquid crystal display device and a drive method thereof. Counting and scanning the number of electrodes to be compensated in each data electrode in the period by a detection and counting circuit, then the number of the electrodes to be compensated is converted into compensating time, and then data electrode potential is converted into intermediate potential during the compensating time; after being compensated, the intermediate potential is converted into a potential needed by next datum again, thus reducing the problem of nonuniform brightness of the liquid crystal display device and promoting the quality of a liquid crystal display panel.
Description
technical field [0001] The invention relates to a driving device and a driving method of a liquid crystal display device, in particular to a driving device and a driving method for reducing brightness unevenness of a matrix liquid crystal display device. Background technique [0002] Liquid crystal is an organic compound between solid and liquid. It is also a compound with standardized molecular arrangement. When heated, it will become a transparent liquid, and when it is cooled, it will become a crystalline turbid solid. Because of this characteristic, it is called called liquid crystals. Due to the basic characteristics of liquid crystals, the basic principle of liquid crystal displays is to encapsulate the liquid crystals in a glass box and then apply an electric field to change the orientation of the liquid crystal molecules. Changes in orientation will change the optical properties, which can be changed through polarizers. Translucency, to achieve bright and dim effect...
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IPC IPC(8): G09G3/36G09G3/20G09G5/02G09G5/10G02F1/133
Inventor 郑家麒
Owner SITRONIX TECH CORP