Liquid crystal display device for overhead projector
AssigneeSharp Kabushiki Kaisha
InventorsMakoto Yoshimura, Haruyoshi Hanada, Hirofumi Fukuoka
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Abstract
A liquid crystal display device for an overhead projector has a light-transmissive liquid crystal display cell sandwiched between protective plates both from above and below. At least one of these protective plates is separated from the cell surface to form an air passage provided with a fan such that air can be caused to flow therethrough and come into direct contact with the cell. The cell can thus be cooled efficiently and the light of the projector can be increased for projecting a clearer image.
Claims15
In an liquid crystal display device for an overhead projector with a light-transmissive liquid crystal display cell placed below an upper protective plate and above a lower protective plate, the improvement wherein said liquid crystal display and said lower protective plate form therebetween an air passage for a unidirectional air flow therethrough from an inlet opening to an outlet opening, said device comprising a fan disposed inside a fan room which connects to said air passage through said inlet opening, said air passage at said inlet opening being so shaped that said fan causes air entering said air passage through said inlet opening to be blown directly on said display cell.
In a liquid crystal display device for an overhead projector with a light-transmissive liquid crystal display cell placed below an upper protective plate and above a lower protective plate, the improvement wherein said liquid crystal display cell and said lower protective plate form therebetween a lower air passage and said liquid crystal display cell and said upper protective plate form therebetween an upper air passage and wherein said device further comprises means for causing unidirectional air flows in mutually opposite directions through said lower and upper air passages.
Dependencies are inferred from the claim text.