Fresnel lens, transmission screen, and rear projection-type display device using the lens

A Fresnel lens and display device technology, applied to projectors, lenses, and projection devices with built-in screens/external screens, etc., can solve the problems of increased thickness of projection display devices, prevent stray light, and avoid additional components or working hours
CN1867864AInactive Publication Date: 2006-11-22TOPPAN PRINTING CO LTD
10 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TOPPAN PRINTING CO LTD
Publication Date
2006-11-22
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A rear projection-type display device has a Fresnel lens sheet where a lens pattern having a Fresnel surface as a light ray transmissive surface and a rise surface as a non-light ray transmissive surface are concentrically formed and where the optical axis, the center of the lens pattern, of a Fresnel lens is positioned outside the Fresnel lens sheet; a transmission screen having a light diffusion plate; a projector capable of projecting an image on the transmission screen; and a reflection mirror provided between the projector and the transmission screen. The reflection mirror is installed at a substantially middle position between the projector and the transmission screen.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a Fresnel lens sheet used in a transmissive screen, a transmissive screen, and a rear projection display device using them.

[0002] this application claims priority to Japanese Patent Application No. 2003-353272 for which it applied on October 14, 2003, and uses the content here. Background technique

[0003] Historically, the rear projection screen has been widely used as a kind of projection screen. A television using this rear projection screen is constructed as follows. Generally, image light projected from a projector equipped with a light source, an image display body, and a projection lens passes through a Fresnel lens sheet having a Fresnel lens and a lenticular lens having a lenticular lens. piece, communicated to the observer.

[0004] The projection TV screen generally pursues the optical function of diffused widely in the horizontal direction and diffused narrowly in the vertical direction than in the horizontal ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More