发明授权
US07095558B2 Image display device, rear projection type screen used in image display device, Fresnel lens sheet, and method of making Fresnel lens sheet
有权
图像显示装置，图像显示装置中使用的背投型屏幕，菲涅耳透镜片，以及制造菲涅尔透镜片的方法
- 专利标题： Image display device, rear projection type screen used in image display device, Fresnel lens sheet, and method of making Fresnel lens sheet
- 专利标题（中）： 图像显示装置，图像显示装置中使用的背投型屏幕，菲涅耳透镜片，以及制造菲涅尔透镜片的方法
-
申请号： US10857647申请日： 2004-05-28
-
公开(公告)号： US07095558B2公开(公告)日： 2006-08-22
- 发明人: Hiroki Yoshikawa , Tetsu Ohishi , Koji Hirata , Daisuke Imafuku
- 申请人： Hiroki Yoshikawa , Tetsu Ohishi , Koji Hirata , Daisuke Imafuku
- 申请人地址： JP Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Townsend and Townsend and Crew LLP
- 优先权： JP2003-308198 20030901; JP2003-322430 20030916
- 主分类号： G03B21/60
- IPC分类号： G03B21/60 ; G03B21/28 ; G02B3/08 ; G02B5/04
摘要：
A total reflecting prism portion is formed on an image generation source side of a Fresnel lens sheet which constitutes a rear projection type screen. The total reflecting prism portion is formed in an area in which the angle of incidence of a projection image projected from an optical part on the Fresnel lens sheet is at least about 40·. The total reflecting prism portion causes incident light to be outputted as output light at a predetermined output angle by a total reflection phenomenon after a first refraction phenomenon. A refracting prism portion is formed on an image monitoring side of the Fresnel lens sheet. The refracting prism portion is formed in an area opposed to the portion where the total reflecting prism portion is not formed. The refracting prism portion causes incident light to be outputted as output light at a predetermined output angle by a second refraction phenomenon.
公开/授权文献
信息查询
