Color picture display apparatus using hue modification to improve picture quality
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKazuya Maeshima, Zenichiro Hara, Takashi Okamoto, Shinya Iio
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Abstract
A color picture display apparatus employs an array of light-emitting diodes or other light-emitting elements emitting different colors. A television signal is converted to monochromatic signals of the different colors. A color converter modifies the monochromatic signals, thereby changing the displayed hues to match the hues that would be displayed on a television screen, to compensate for ambient lighting conditions, or to achieve other desired effects. If each picture element has only a single light-emitting element, the modification preferably avoids unlit gaps in monochromatic areas of the displayed picture.
Claims16
A color picture display apparatus, comprising:
- first conversion means converting a color television signal to a plurality of monochromatic digital signals representing different colors;
- second conversion means coupled to said first conversion means, converting said monochromatic digital signals to modified monochromatic digital signals representing desired hues;
- and
- display means coupled to said second conversion means, displaying a color picture according to said modified monochromatic digital signals, said display-means having a plurality of light-emitting elements disposed in a regular array, each one of said light-emitting elements emitting one of said different colors, wherein substantially all said light-emitting elements emitting one color emit said color when any color is reproduced, other than black, wherein a comparatively large number of said light-emitting elements emit comparatively long-wavelength light.
A method of displaying a color picture, comprising the steps of:
- (a) converting a color television signal to a plurality of monochromatic digital signals representing different colors;
- (b) converting said monochromatic digital signals to modified monochromatic digital signals representing desired hues;
- and
- (c) controlling a regular array of light-emitting elements according to said modified monochromatic digital signals, each one of said light-emitting elements emitting one of said different colors, wherein substantially all said light-emitting elements emitting one color emit said color when any color is reproduced, other than black, wherein a comparatively large number of light-emitting elements emit comparatively long-wavelength light.
Dependencies are inferred from the claim text.