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Patent Searching and Data


Title:
LIGHT TRANSMISSION PLATE, SIDELIGHT TYPE SURFACE LIGHT SOURCE DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2001083507
Kind Code:
A
Abstract:

To prevent a bright line caused by reflection of edges from occurring and to emit irradiating light with uniform light quantity by arranging plural emission-enhancing regions with a variety of extent to promote the emission of irradiating light mixed with themselves and making the density of the plural emission-enhancing regions variable.

The first emission-enhancing regions P1 are arranged in the vicinity of the incident plane where a bright line is observed. Furthermore, the second emission-enhancing regions P2 with a relatively lower function to promote the emission of irradiating light than the first emission-enhancing regions P1 are densely arranged among the first emission-enhancing regions P1. Furthermore, the ratio of area covered with, and the unit area of the light- emitting surface 2C occupied with, the second emission-enhancing regions P2 gradually get lower as it goes farther away from the vicinity of the incident plane. Thus, the part where a bright line is prevented from occurring is made less conspicuous. In this case, the first and the second emission-enhancing regions P1 and P2 are formed in dimensions difficult to be visible.


Inventors:
OKAWA SHINGO
Application Number:
JP25734999A
Publication Date:
March 30, 2001
Filing Date:
September 10, 1999
Export Citation:
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Assignee:
ENPLAS CORP
International Classes:
G09F9/00; F21V8/00; G02B6/00; G02B27/00; G02F1/1335; G02F1/13357; G02F1/295; F21Y103/00; (IPC1-7): G02F1/13357; F21V8/00
Attorney, Agent or Firm:
Shigenori Tada