High contrast LED matrix

Details High contrast LED matrix High contrast LED matrix

1994-03-18

1995-01-17

Larkins, William D.

Active solid-state devices (e.g., transistors, solid-state diode

Incoherent light emitter structure

Plural light emitting devices

257 81, 257 82, 257 91, 257 99, 257100, 313500, H01L 3300, H01L 3112, H01L 3116

Patent

active

053828119

ABSTRACT:
An optical semiconductor device having a substrate; a plurality of light-emitting diodes disposed in a specific arrangement on the substrate; a peripheral member for housing the substrate and the light-emitting diodes; a first resin layer formed on an area of said substrate within the peripheral member and not occupied by said light-emitting diodes, for securing the light-emitting diodes between the substrate and the peripheral member; and a second resin layer formed on the first resin layer, wherein: minute irregularities are formed on the second resin layer so that external light directed onto the exposed surface of the second resin layer is diffusedly reflected.

REFERENCES:
patent: 3950844 (1976-04-01), Wisbey
patent: 4485377 (1984-11-01), Claus et al.
patent: 4929866 (1990-05-01), Murata et al.
patent: 4933545 (1990-06-01), Saaski et al.
patent: 5036248 (1991-07-01), McEwan et al.
patent: 5162879 (1992-11-01), Sasagawa et al.

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