| 摘要 |
PURPOSE: A liquid-crystal driving circuit and method are provided to accurately control the response speed of the liquid crystal in a liquid-crystal display device by appropriately controlling the voltage applied to the liquid crystal. CONSTITUTION: A receiving unit(2) receives a picture signal through an input terminal(1), and sequentially outputs present image data(Di1) representing one image frame (referred to below as the present image). An image data processor(3) comprising an encoding unit(4), a delay unit(5), decoding units(6,7), a compensation data generator(8), and a compensation unit(9) generates new image data(Dj1) corresponding to the present image data(Di1). A display unit(10) comprising a generally used type of liquid-crystal display panel performs the display operation by applying voltages corresponding to gray-scale values in the image to a liquid crystal. The encoding unit(4) encodes the present image data(Di1) and outputs encoded data(Da1). Block truncation coding methods such as FBTC or GBTC are used to encode the present image data(Di1). Any still-picture encoding method also is used, including two-dimensional discrete cosine transform encoding methods such as JPEG, predictive encoding methods such as JPEG-LS, and wavelet transform methods such as JPEG2000. These still-image encoding methods are used even if they are non-reversible, so that the image data before encoding and the decoded image data are not completely identical.
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