Display
AssigneeSharp Kabushiki Kaisha
InventorsKei Tokui, Kenichi Iwauchi
Life of this patent
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Abstract
In a display device of the invention, driving of the piezoelectric element is controlled to change the light path of the propagating light inside a light guiding plate. By illuminating a liquid crystal panel in this manner, an illumination time and a no illumination time can be provided for the liquid crystal panel within one frame period. This realizes impulse-type-like display in displaying moving images on the liquid crystal panel, and thereby improves an image quality of moving images. Further, since the light is used only in desired regions, spontaneous luminance can be improved and the light can be used more efficiently.
Claims14
A display device which includes a liquid crystal panel having a plurality of pixels, and an illuminating unit for illuminating the liquid crystal panel using a light guiding plate,
- wherein the illuminating unit comprises light path changing means for changing, by being brought into contact with or not in contact with the light guiding plate, a light path of propagating light inside the light guiding plate, so as to change intensity of light illuminating the liquid crystal panel,
- a number of the light path changing means being smaller than a number of the pixels of the liquid crystal panel, and
- one of the light path changing means, which is able to independently be brought into contact with or not in contact with the light guiding plate, being brought into contact with the light guiding plate in such a way as to allow the pixels of the liquid crystal panel to be illuminated.
Dependencies are inferred from the claim text.