Invention Grant
- Patent Title: Projection screen and its manufacturing method
- Patent Title (中): 投影屏及其制造方法
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Application No.: US11325929Application Date: 2006-01-05
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Publication No.: US07158300B2Publication Date: 2007-01-02
- Inventor: Kazuhito Shimoda
- Applicant: Kazuhito Shimoda
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: Wolf, Greenfield & Sacks, P.C.
- Priority: JP2002-215666 20020724; JP2002-259027 20020904
- Main IPC: G03B21/60
- IPC: G03B21/60 ; G03B21/56

Abstract:
The invention provides a projection screen, wherein clear images can be obtained without being influenced by projection environments, the flexibility can be obtained, and its manufacturing cost can be reduced and its manufacturing method. An optical multilayer film is formed on a transparent substrate by alternately layering metal films and dielectric films by using spattering. This multilayer film has the high reflection characteristics in relation to three primary colors wavelength bands lights, and has the high absorption characteristics in relation to lights other than the three primary colors wavelength bands lights. Therefore, the white level and the black level of images can be raised. Further, in terms of the optical multilayer film, as the film thickness dependence of the reflectance change becomes smaller and the incidence angle dependence of reflectance change becomes smaller, a wide visual field angle can be obtained.
Public/Granted literature
- US20060114560A1 Projection screen and its manufacturing method Public/Granted day:2006-06-01
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