Device and method for emitting light with increased...

Details Device and method for emitting light with increased... Device and method for emitting light with increased...

2007-03-27

2007-03-27

Husar, Stephen F (Department: 2875)

Illumination

Light fiber, rod, or pipe

Light emitting diode

C362S311040, C359S566000, C359S574000, C359S575000, C257S098000

Reexamination Certificate

active

10638716

ABSTRACT:
A device and method for emitting light with increased brightness utilizes a lamp having a diffractive grating pattern. The diffractive grating pattern diffracts incident light that originates from a light source toward a light output region of the lamp. The diffraction of the incident light causes more of the light to impinge the light output region of the lamp at desired angles. This reduces the angular distribution of the light emitted from the light output region as output light. The reduction in angular distribution of emitted light results in an increased brightness of the device.

REFERENCES:
patent: 5339225 (1994-08-01), Wiggerman
patent: 6196691 (2001-03-01), Ochiai
patent: 6610598 (2003-08-01), Chen
patent: 2002/0131275 (2002-09-01), Yamamoto et al.

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