Power supply apparatus capable of improving flicker phenomenon of liquid crystal display (LCD), LCD capable of improving flicker phenomenon, and method thereof
A technology of liquid crystal display and flicker phenomenon, applied in the direction of irreversible DC power input conversion to AC power output, static indicators, instruments, etc.
Inactive Publication Date: 2011-11-23
CPT TECH GRP +1
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Problems solved by technology
In addition, designers of thin-film liquid crystal displays cannot compensate the flicker phenomenon caused by △VCOM not equal to the high level of the feed-through voltage △VPH by only adjusting the voltage level of the AC common voltage VCOMAC
Method used
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[0077] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments and related drawings.
[0078] Please refer to Figure 5 , Figure 5 It is a schematic diagram illustrating a power supply device 500 that can improve the flicker phenomenon of a liquid crystal display according to an embodiment of the present invention. The power supply device 500 includes a DC voltage / DC voltage conversion circuit 502 , a common voltage circuit 504 and a clamping circuit 506 . The DC voltage / DC voltage conversion circuit 502 is used to generate a DC gate extremely low voltage VGLDC; the common voltage circuit 504 is used to receive a polarity inversion signal POL generated by a timing control circuit, and according to the polarity inversion signal POL , to generate an AC common voltage VCOMAC; the clamping circuit 506 is coupled to the DC voltage / DC voltage c...
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The invention discloses a power supply apparatus capable of improving a flicker phenomenon of an LCD. The power supply apparatus comprises a direct current voltage / direct current voltage conversion circuit, a common voltage circuit and a clamping circuit. The direct current voltage / direct current voltage conversion circuit is used for generating direct current gate low voltage. The common voltage circuit receives a polarity inversion signal generated by a sequential control circuit and generates alternating current common voltage according to the polarity inversion signal. The clamping circuit is coupled to the direct current voltage / direct current voltage conversion circuit and the common voltage circuit, and is used for receiving the direct current gate low voltage and the alternating current common voltage, outputting the alternating current common voltage, and outputting alternating current gate low voltage according to the direct current gate low voltage and the alternating current common voltage. A display panel improves the flicker phenomenon according to the alternating current gate low voltage.
Description
technical field [0001] The invention relates to a power supply device capable of improving the flicker phenomenon of a liquid crystal display, a liquid crystal display capable of improving the flicker phenomenon and a method thereof, especially a method for improving the flicker phenomenon caused by an AC common voltage by using an extremely low voltage of an AC gate A power supply device, a liquid crystal display and a method thereof. Background technique [0002] Please refer to figure 1 , figure 1 It is a schematic diagram illustrating a plurality of pixels contained in a thin film transistor liquid crystal display (TFT-LCD) for prior art. Such as figure 1 As shown, each pixel includes a thin film transistor 102, a liquid crystal capacitor CLC and a storage capacitor CS, wherein the gate G of the thin film transistor 102 is coupled to a gate line G1, and the source S is coupled to a data line D1, And the drain D is coupled to the liquid crystal capacitor CLC and the s...
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IPC IPC(8): H02M7/48G09G3/36
Inventor 游志强吕家亿
Owner CPT TECH GRP