Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – Plural light emitting devices
Patent
1992-04-14
1993-11-09
James, Andrew J.
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
Plural light emitting devices
257 95, 257623, 257 96, H01L 3300
Patent
active
052605884
ABSTRACT:
The present invention, which is directed to a light-emitting diode array for use as the light source in optical printers and other such applications, provides improved optical efficiency and a more uniform distribution of emission intensity. The light-emitting diodes are formed as reverse mesas with a mirrored sloping surface that reflects light in the direction of the light emitting surface of the diode. This improves the emission efficiency of each diode. In addition, this also increases the light output from the edge portions of light-emitting surfaces of the diodes so as to produce a more uniform distribution of light output from the light-emitting diodes.
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patent: 4236122 (1980-11-01), Cho et al.
patent: 4719497 (1988-01-01), Tsai
patent: 4788159 (1988-11-01), Smith
patent: 4984035 (1991-01-01), Kanzawa et al.
patent: 5055893 (1991-10-01), Sasagawa
patent: 5103270 (1992-04-01), Sato et al.
patent: 5196718 (1993-03-01), Sasagawa
Kazuno Tadao
Ohta Hirokazu
Sasagawa Teruo
Shibata Naoki
Bowers Courtney A.
Eastman Kodak Company
James Andrew J.
Owens Raymond L.
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