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Patent Searching and Data


Title:
TRANSMISSION TYPE SCREEN AND PRODUCTION OF METALLIC MOLD FOR MOLDING THIS SCREEN
Document Type and Number:
Japanese Patent JPH06175230
Kind Code:
A
Abstract:

PURPOSE: To produce the transmission type screen which is small in unit lens pitch and can deal with a high-fineness liquid crystal PTV.

CONSTITUTION: One lens shape is cut on a blank material for the metallic mold by means of at least three pieces of bits 43; a bit 43 having the shape of an arc-shaped convex lens shape existing at the center of the lens and two pieces of bits 43 having the shapes of a total reflection part for totally reflecting incident light and an exist part for ejecting the incident light outside the lens. The transmission type screen having lenticular lenses of ≤0.3mm unit pitch is molded by using the metallic molds.


Inventors:
NAKANO SHINGO
SHIMAMURA KIYOSHI
Application Number:
JP35154392A
Publication Date:
June 24, 1994
Filing Date:
December 09, 1992
Export Citation:
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Assignee:
ASAHI CHEMICAL IND
International Classes:
B23B29/24; B29C33/38; G03B21/62; G03B21/625; B29L11/00; (IPC1-7): G03B21/62; B23B29/24; B29C33/38
Attorney, Agent or Firm:
Yoshio Toyota (1 outside)