Light Emitting Diode planar light source with blue light or ultr

Details Light Emitting Diode planar light source with blue light or ultr Light Emitting Diode planar light source with blue light or ultr

1997-10-06

1999-11-09

O'Shea, Sandra

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313113, 313112, H01J 162

Patent

active

059820926

ABSTRACT:
LED planar light source which introduces blue light or ultra violet rays emitted from luminescent crystals to a light conductive plate from its side surface. After being scattered and diffused by the light conductive plate and reflected from a reflection layer, the incident light and the excited light from a fluorescent pigment layer are mixed and synthesized to form white light or light of another specific wave length. Such a planar light source can be utilized as a back light source for a LCD.

REFERENCES:
patent: 4035686 (1977-07-01), Fleming
patent: 4168102 (1979-09-01), Chida et al.
patent: 4267486 (1981-05-01), Thillays
patent: 4853593 (1989-08-01), Stein
patent: 5045754 (1991-09-01), Clerc
patent: 5813752 (1998-09-01), Singer et al.
patent: 5813753 (1998-09-01), Vriens et al.
Patent Abstract of Japan; Publication No.: 08007614 A; DOP: Jan. 12, 1996 Application No.: 06134763; Date of Filing: Jun. 17, 1994; Applicant: Nichia Chem Ind Ltd.; Inventor: Shimizu Yoshinori; Title: Sheet-Like Light Source (1 pg.).

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