Surface luminous lighting unit

Details Surface luminous lighting unit Surface luminous lighting unit

1992-06-22

1994-10-25

Yeung, James C.

Illumination

With furniture

362 31, 362260, 362 33, F21V 800

Patent

active

053595033

ABSTRACT:
A surface luminous lighting unit has a light panel comprising a plurality of light guiding plates laminated in different lengths. The longer side of the light panel is made shorter than the distance between filaments of a lamp, and longer than the distance between the portions where a luminance of the lamp is equal to 75% of the maximum luminance of the lamp. The surface luminous lighting unit comprises a light guide which comprises a plurality of light guiding plates in different length laminated in such a manner that the sides of those plates where light enters are made level with each other, where the other sides thereof are arranged in a step-like. A linear light source is affixed to the light entering side of the light guide, and a reflector is affixed to the light exiting side of the light guide in such a manner as to extend thereover.

REFERENCES:
patent: 2480178 (1949-08-01), Zinberg
patent: 4642736 (1987-02-01), Masuzawa et al.
patent: 4985809 (1991-01-01), Matsui et al.
patent: 5035392 (1991-07-01), Gross et al.
patent: 5046826 (1991-09-01), Iwamoto et al.
patent: 5122941 (1992-06-01), Gross et al.

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