LED illumination apparatus

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9784899
SERIAL NO

15147047

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Abstract

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The present invention is characterized in that a light emitting part of LED 1 has a planar and point-symmetrical shape, a light emission angle distribution is a Lambert distribution and a light emission face is a scattering face; a hemispheric mirror 3 forms a reflection face 3a on the interior face, and has an aperture 3b at the center, while the reflection face 3a is disposed so as to oppose to LED 1; a normal line of LED 1 and an optical axis of the hemispheric mirror 3 are coincident with each other; an interval between LED 1 and the hemispheric mirror 3 is equal to or smaller than a curvature radius of the hemispheric mirror 3; a dimension of the aperture 3b of the hemispheric mirror 3 is substantially equal to a radiation dimension; and sin (tan−1 d LED/2t)≈NA object is established.

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Patent Owner(s)

Patent OwnerAddress
U-TECHNOLOGY CO LTDTOKYO

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Shikano, Shuji Miyagi, JP 10 130
Umetsu, Kenji Miyagi, JP 18 65

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