Sharp Kabushiki Kaisha Corporation

Satoshi Ueno

Hiroyuki Furukawa

Yoichi Yamamoto

Yasuhiro Yoshida

Norio Yasunishi

Kunihiko Yamamoto

Akira Yamaguchi

Koki Taniguchi

An image processing apparatus, for processing an image signal representing pixel values of pixels so as to display an image including the pixels by an image display apparatus, includes a detection section for detecting a low frequency portion of the image signal, which corresponds to a first series of pixels having a first pixel value and a second series of pixels having a second pixel value different from the first pixel value, the second series of pixels following the first series of pixels; and a signal expansion section for expanding a prescribed portion of the low frequency portion of the image signal, the prescribed portion including at least one of the first series of pixels and the second series of pixels, such that the first pixel value is gradually changed to the second pixel value.

Image display apparatus and method

A method for driving a liquid crystal display device is provided. The device includes a plurality of row electrodes to which a scanning signal is applied: a plurality of column electrodes disposed so as to cross the plurality of row electrodes, to which a display data signal is applied; and a liquid crystal layer interposed between one of the plurality of row electrodes and one of the plurality of column electrodes, for performing a display at a crossing portion of one of the plurality of row electrodes and one of the plurality of column electrodes in response to an effective value of a voltage applied across one of the plurality of row electrodes and one of the plurality of column electrodes, wherein gray-scale display data consisting of a plurality of bits is received, and a voltage of a display data signal selected per bit by a scanning signal is applied during a period in which weights are assigned to bits during one horizontal scanning period and a voltage applying timing is made different at at least one column electrode, whereby a gray-scale display is realized.

Liquid crystal display device and method for driving the same

A display device controls a signal applied to the n dots such that a sum of luminance of n dots (n is an integer of 1 or more) is virtually equal to an original luminance of the defective dot on the assumption that the n dots, which are adjacent to an electrically uncontrollable dot, are not originally illuminated. The display device also controls a signal applied to dots adjacent to the defective dot so as to display a color which is closer to an original color obtained by input signals to the defective dot and the adjacent dots.

Display device

A liquid crystal display device having a plurality of row electrodes to which a scanning voltage is applied; a plurality of column electrodes provided so as to cross the plurality of row electrodes, to which a display data voltage is applied; and a liquid crystal layer interposed between the plurality of row electrodes and the plurality of column electrodes, which provides a display function at intersections between the plurality of row electrodes and the plurality of column electrodes in response to a RMS value of a voltage applied between the plurality of row electrodes and the plurality of column electrodes, includes: a section for outputting a display data signal representing the display data voltage having three or more voltage levels; a compensation circuit for outputting a compensation data signal based on a RMS value difference between the display data voltage and a respective resultant display data voltage applied to the plurality of column electrodes; and a driving circuit for applying a compensation voltage to at least one of the plurality of column electrodes based on the compensation data signal.

Liquid crystal display device

A driving method of a liquid crystal display device of a matrix type including a plurality of scanning electrodes and a plurality of data electrodes is provided. Certain scanning electrodes are simultaneously selected and driven. A correction voltage is added to a scanning signal to be supplied to the certain scanning electrodes.

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Tenri, Japan

Satoshi Ueno