The patent's inventor is Miyashita, Takashi (Ome, JP).
This patent was filed on
From the background information supplied by the inventors, news correspondents obtained the following quote: "The present invention relates to a liquid crystal display apparatus including color filters of RGBW mosaic arrangement and a method of driving the same.
"Conventionally, color display is provided using display pixels each including sub-pixels corresponding to a plurality of colors. For example, in a display apparatus including color filters with an RGB stripe arrangement, in which the three colors of red ®, green (G) and blue (B) are repeatedly arranged in the row direction, each of the display pixels corresponding to the three RGB colors forms a sub-pixel. Such a display apparatus provides color display by handling the sub-pixels of the three colors as the display pixel, and displaying the sub-pixels of the three colors in spatial division according to image data input by a unit of the display pixel.
"Further, sub-pixel rendering has recently been used as a technique for enabling display of high-resolution images with a small number of display pixels. The sub-pixel rendering technique is a technique of applying a grayscale signal to be applied to a sub-pixel corresponding to a color in an arbitrary display pixel by superimposing the grayscale signal on sub-pixels arranged in the periphery of that pixel. By using such a sub-pixel rendering technique, it is possible to provide display with the resolution of the same level as that of the conventional RGB stripe arrangement, even if the number of sub-pixels is decreased to 2/3 of that of the conventional RGB stripe arrangement. By decreasing the total number of sub-pixels, it is possible to increase the pixel area of each sub-pixel to 3/2, and achieve a high aperture ratio.
"Further, as an application of the sub-pixel rendering technique, there is proposed a liquid crystal display apparatus including color filters in which four sub-pixels of
"Liquid crystals used as display pixels of a liquid display apparatus have a characteristic that its properties are deteriorated by prolonged application of a direct-current voltage. The display pixels of liquid crystal display apparatuses are therefore generally driven by an alternating-current voltage, for the purpose of longer operating life and stabilized display of the liquid crystal display apparatuses. Dot inversion drive, which inverts the polarity of a voltage to be applied to display pixels by a unit of a sub-pixel, is known as an approach for the alternating-current voltage drive. It is also possible to suppress flicker at the time of display by using the dot inversion drive in alternating-current voltage drive of liquid crystals.
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