Multi-layer type light emitting device

Details Multi-layer type light emitting device Multi-layer type light emitting device

1995-03-23

1997-04-22

O'Shea, Sandra L.

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313498, 313110, 313113, 313114, 257 98, H01J 162, H01J 516, H01L 3300

Patent

active

056231814

ABSTRACT:
Disclosed is a multi-layer type light emitting device including: at least two light emitting sources disposed to be multi-layered; and an optical surface disposed so as to correspond to each of the light emitting sources excluding one positioned at the rearmost stage for forwardly reflecting rays of light emitted by the light emitting source and transmitting rays of light emitted by the light emitting source disposed at the rear stage. With this device, rays of light emitted by each of the light emitting sources excluding one positioned at the rearmost stage are reflected from the corresponding optical surface and radiated forwardly. In this case, when a different optical surface is disposed on the front stage, the rays of light transmit the optical surface and are radiated to the exterior. In the case where rays of light emitted by the light emitting source positioned on the rearmost stage are radiated forwardly, they transmit the optical surface positioned at the front stage and are radiated to the exterior. Accordingly, rays of light emitted by the multi-layered light emitting sources are radiated from the same plane to the exterior.

REFERENCES:
patent: 3462605 (1969-08-01), Engeler
patent: 3875456 (1975-04-01), Kano et al.
patent: 4560901 (1985-12-01), Thillays
patent: 4630183 (1986-12-01), Fujita
Patent Abstracts Of Japan vol. 018 No. 270 (E-1552), 23 May 1994.
Patent Abstracts Of Japan vol. 013 No. 401 (E-816), 6 Sep. 1989.
Patent Abstracts Of Japan vol. 016 No. 551 (P-1453), 20 Nov. 1992.
Patent Abstracts Of Japan vol. 018 No. 080 (E-1505), 9 Feb. 1994.

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