Title:
LENS SHEET, DIFFUSION PANEL AND TRANSMISSION TYPE SCREEN
Document Type and Number:
Japanese Patent JP3484827
Kind Code:
B2
Abstract:
PURPOSE: To provide a bright and sharp image with little reflection of external light by forming an anti-reflection film of thickness different from an optical interference theory on a lens sheet member provided with a definite or indefinite shape.
CONSTITUTION: An anti-reflection film 5 is provided on the front surface of a lenticular lens 4 with a prescribed thickness. The anti-reflection film 5 is composed of by applying a member having refractive index lower than that of a material composing a lenticular lens sheet 7, e.g. a resin member made of polymer on the surface so that the film thickness becomes 2λ/4n-5λ/4n. Consequently, a lens sheet for a transmission type screen or a diffusion panel exhibits the anti-reflection effect larger than before. Namely, the anti-reflection effect is larger compared with the film thickness based on the optical interference theory, the performance of high transmissivity is obtained and they are easily and cheaply worked/produced by means of a conventional device.
Inventors:
Katsuaki Mitani
Satoshi Aoki
Hirokazu Sakaguchi
Satoshi Aoki
Hirokazu Sakaguchi
Application Number:
JP15155195A
Publication Date:
January 06, 2004
Filing Date:
June 19, 1995
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G02B5/02; G03B21/62; G03B21/625; (IPC1-7): G02B5/02; G03B21/62
Domestic Patent References:
| JP6273852A | ||||
| JP5196984A | ||||
| JP63113402A | ||||
| JP61230125A | ||||
| JP7168005A |
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)
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