专利名称：Image display device, rear projection type
screen used in image display device, Fresnellens sheet, and method of making Fresnellens sheet
发明人：Hiroki Yoshikawa,Tetsu Ohishi,Koji
Hirata,Daisuke Imafuku
申请号：US11486830申请日：20060714
公开号：US20060256433A1公开日：20061116
专利附图：
摘要：A total reflecting prism portion is formed on an image generation source sideof a Fresnel lens sheet which constitutes a rear projection type screen. The totalreflecting prism portion is formed in an area in which the angle of incidence of aprojection image projected from an optical part on the Fresnel lens sheet is at leastabout 40°. The total reflecting prism portion causes incident light to be outputted asoutput light at a predetermined output angle by a total reflection phenomenon after afirst refraction phenomenon. Further, a refracting prism portion is formed on an imagemonitoring side of the Fresnel lens sheet. The refracting prism portion is formed in anarea opposed to the portion where the total reflecting prism portion is not formed. Therefracting prism portion causes incident light to be outputted as output light at apredetermined output angle by a second refraction phenomenon.
申请人：Hiroki Yoshikawa,Tetsu Ohishi,Koji Hirata,Daisuke Imafuku
地址：Hiratsuka JP,Hiratsuka JP,Yokohama JP,Fujisawa JP
国籍：JP,JP,JP,JP
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