Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – With reflector – opaque mask – or optical element integral...
Patent
1992-07-06
1993-11-23
Mintel, William
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
With reflector, opaque mask, or optical element integral...
257 96, 372 45, 372 46, H01L 3300
Patent
active
052647153
ABSTRACT:
A light emitting device is provided with mirrors placed on opposite sides of the source of light and spaced apart by a distance that is determined as a function of the wavelength of the light emitted by the light source. One particular embodiment of the present invention spaces the mirrors apart by a distance equal to n.lambda./2+.lambda./4, where n is an integer value that is maintained as small as possible within practical constraints. The close proximity of the mirrors and their particular spacing which is determined as a function of the wavelength inhibits undesirable modes of light emission in directions toward the mirrors. This inhibition of light in undesirable modes perpendicular to the mirrors enhances the production of light in modes that are parallel to the mirror surfaces. The overall light output efficiency of the device is enhanced through the inhibition of these undesirable modes.
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Guenter James K.
Johnson Ralph H.
Honeywell Inc.
Lanyi William D.
Mintel William
Tran Minhloan
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