Screen, its manufacturing method and image display system

• US 7,242,523 B2
• Filed: 04/11/2005
• Issued: 07/10/2007
• Est. Priority Date: 12/13/2001
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Ishimoto, Ko, Kuroki, Yoshihiko, Toda, Atsushi, Ohnishi, Michihiro, Akao, Hirotaka
• Primary Examiner(s): MAHONEY, CHRISTOPHER E
• Application Number:
  US11/103,213
• Publication Number:
  US 20070002438A1
• Time in Patent Office: 820 Days
• Field of Search: 359/443, 359/451, 359452-453, 359/460, 359/449, 359/584, 359/589
• US Class Current: 359/443
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: G02B 1/005 made of photonic crystals or photonic band gap materials photonic band-gap structures or photonic lattices in integrated optics G02B6/1225; photonic band-gap structures or photonic lattices in optical fibres G02B6/02295
• CPC Class Codes: G02B 5/003 Light absorbing elements
• CPC Class Codes: G02B 5/26 Reflecting filters G02B5/28 takes precedence
• CPC Class Codes: G02F 2201/50 Protective arrangements
• CPC Class Codes: G02F 2202/32 Photonic crystals
• CPC Class Codes: G03B 21/56 Projection screens
• CPC Class Codes: G03B 21/567 for colour projection G03B21/58, G03B21/60 take precedence
• CPC Class Codes: G03B 21/60 characterised by the nature of the surface

Abstract

A projection screen comprises a red-reflecting particle layer, green-reflecting particle layer and blue-reflecting particle layer sequentially stacked on a substrate. In each particle layer, particles are accumulated by eleven cycles in a regularly alignment such as close-packed structure. Diameter of red-reflecting particles is approximately 280 nm, diameter of green-reflecting particles is approximately 235 nm, and diameter of blue-reflecting particles is approximately 212 nm. Each particles layer is accumulated by self-organized technique. The substrate used here can absorb light of wavelengths other than those of red, green and blue three primary colors.

Claims

1. A screen comprising a structure using dielectric multi-layered films to reflect light of specific wavelengths, said screen including a layer or a bulk substrate for absorbing visible light;

wherein a red-reflecting dielectric multi-layered film, a green-reflecting dielectric multi-layered film and a blue-reflecting dielectric multi-layered film are stacked in the vertical direction on a substrate;

wherein an irregularity or a film for improving wettability is formed on the surface of said substrate;

wherein said layer or bulk substrate for absorbing visible light absorbs visible light of all wavelength bands; and

wherein the periodical structure of each said dielectric multi-layered film includes at least 10 cycles.

2. A screen comprising a structure using dielectric multi-layered films to reflect light of specific wavelengths, said screen including a layer or a bulk substrate for absorbing visible light;

wherein said layer or bulk substrate for absorbing visible light absorbs visible light of all wavelength bands;

wherein the periodical structure of each said dielectric multi-layered film includes at least 10 cycles; and

wherein said dielectric multi-layered films have a curved surface.

3. A screen comprising a structure using dielectric multi-layered films to reflect light of specific wavelengths, said screen including a layer or a bulk substrate for absorbing visible light;

wherein said layer or bulk substrate for absorbing visible light absorbs visible light of all wavelength bands;

wherein the periodical structure of each said dielectric multi-layered film includes at least 10 cycles; and

wherein said dielectric multi-layered films have undulations.