Spread illuminating apparatus having heat sink function
First Claim
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1. A spread illuminating apparatus, comprising:
- a bar-like light source disposed in the vicinity of an end surface of a transparent substrate made of a light-transmissible material, wherein the bar-like light source is composed of a light conductive member and a spot-like light source;
the light conductive member is made of a transparent material, formed bar-like and disposed close to and along at least one end surface of the transparent substrate, and the spot-like light source is disposed on at least one end of the light conductive member, mounted on a printed wiring board, and enclosed by an enclosure made of a material having a high heat conductivity.
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Abstract
A spread illuminating apparatus radiating heat generated by a spot-like light source. The apparatus includes a metal enclosure (31) integrally formed at an end of a metal frame (27) so as to enclose a cover portion (14) which receives a spot-like light source (6) and dummy patterns (26) provided on inner surfaces of the first, second and third face portions (18, 20, 22) of the cover portion (14). The enclosure (31) functions as a heat sink and conducts heat generated by the spot-like light source (6) outwardly for radiation. Heat is conducted owing to the dummy patterns (26).
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7 Claims
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1. A spread illuminating apparatus, comprising:
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a bar-like light source disposed in the vicinity of an end surface of a transparent substrate made of a light-transmissible material, wherein the bar-like light source is composed of a light conductive member and a spot-like light source;
the light conductive member is made of a transparent material, formed bar-like and disposed close to and along at least one end surface of the transparent substrate, and the spot-like light source is disposed on at least one end of the light conductive member, mounted on a printed wiring board, and enclosed by an enclosure made of a material having a high heat conductivity. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification