Transmissive screen and rear projector

A transmissive screen technology, applied to projectors, instruments, and lenses with built-in screens/outside screens, etc., can solve the problem of preventing Moire fringes, Fresnel lenses or cylindrical lenses are not easy to manufacture, and the cost of screens increases And other issues
CN1485688AInactive Publication Date: 2004-03-31SEIKO EPSON CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SEIKO EPSON CORP
Publication Date
2004-03-31
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention seeks to provide a transmissive screen that can be manufactured at a low cost and show uniform diffusion and moire-free images over the entire screen, and to provide a rear projector provided with such a superior transmissive screen. A transmissive screen includes a Fresnel lens portion having Fresnel-lens components on its light-exiting face and a lens array facing the light-exiting face of the Fresnel lens portion and having many lenses on its light-incident face. The transmissive screen further includes separating means for separating the Fresnel lens portion from the lens array portion at least in the periphery of the screen. A rear projector includes such a superior transmissive screen.
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Description

technical field

[0001] The present invention relates to transmissive screens and rear projection projectors. Background technique

[0002] In recent years, demand for rear projection projectors has been increasing as displays suitable for home theater monitors, large-screen TVs, and the like.

[0003] Figure 7 The optical system of a rear projection projector is shown. The rear projection projector 10, such as Figure 7 As shown, there is a projection optical unit 20 for projecting an image, a light guide mirror 30 for guiding the projected image projected by the projection optical unit 20, and a projection image guided by the light guide mirror 30 for projecting. The transmissive screen 40 is arranged in the cabinet 50.

[0004] As the transmissive screen 40 usable in such a rear projection projector 10, it is required that no moiré fringes occur on the screen surface. Japanese Unexamined Patent Publication No. 1-319025 discloses a transmissive screen configured so as n...

Claims

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