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US 7,248,410 B2Granted
Transmission type screen
AssigneeDai Nippon Printing Co., Ltd.
InventorHideki Miyata
Life of this patent
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AssigneeDai Nippon Printing Co., Ltd.
InventorHideki Miyata
Estimating the term…
There is provided a transmission type screen that can suppress deterioration of image quality due to glare distortion of external light and the like that occurs on a screen surface while keeping a feeling (a glossy feeling of an image) as if a CRT-TV is directly viewed. The transmission type screen 10 is arranged by combining a plurality of screen members (for example, a lenticular lens sheet 11 and a Fresnel lens sheet 12), which realize various optical functions such as transmission, diffusion, condensing and the like of light, with each other. A smooth surface having a surface roughness Ra of 0 μm≦Ra≦0.5 μm is formed on the viewer side surface of a nearest-to-viewer side screen member (for example, the lenticular lens sheet 11) of the plurality of screen members, as well as the amount of warping D of the nearest-to-viewer side screen member (for example, the lenticular lens sheet 11) is −10 mm≦D≦15 mm.
A transmission type screen comprising a plurality of screen members combined with each other to realize various optical functions of light and a frame holding the screen members, characterized in that a smooth surface having a surface roughness Ra of 0 μm≦Ra≦0.5 μm is formed on a viewer side surface of a nearest-to-viewer side screen member, which is located nearest to a viewer side, of the plurality of screen members, and in that the screen members are held by the frame such that an amount of warping D of the nearest-to-viewer side screen member is −10 mm≦D≦15 mm wherein D=(A+B)/2−C,
Dependencies are inferred from the claim text.