Shielded reflective light-emitting diode
First Claim
1. A shielded reflective light-emitting diode comprising:
- at least one light source including at least one light-emitting element;
a reflecting mirror provided opposite to said light source; and
a light-shielding member for limiting external light incident on said reflecting mirror, wherein said light-shielding member has an optical opening portion, and said reflecting mirror is shaped like a cylindrical surface in which light emitted from said light source and reflected by said reflecting mirror is condensed linearly so that the linearly condensed light is radiated out through said optical opening portion of said light-shielding member.
1 Assignment
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Accused Products
Abstract
In a shielded reflective LED, each of light sources can be surface-mounted substantially without being influenced by heat distortion based on the difference in thermal expansion coefficient between resin and metal because the light source is so small-sized that only one light-emitting element is sealed with a resin. Moreover, variations in luminous intensity and chromaticity of each of light-emitting elements used in three-color light sources can be examined in advance. Hence, well-matched three-color light sources can be mounted in combination so that display unevenness of a full color display can be reduced greatly. Further, the surface of the substrate portion on which the light source is fixed is silk-screen-printed in black. Hence, external light which enters the device through the optical opening portion when the device is turned off is reflected by the reflecting mirror and absorbed to the surface of the substrate portion. As a result, pseudo-lighting in which external light is radiated out again through the optical opening portion can be prevented thoroughly, so that contrast between light when the device is turned on and light when the device is turned off can be made high.
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Citations
20 Claims
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1. A shielded reflective light-emitting diode comprising:
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at least one light source including at least one light-emitting element;
a reflecting mirror provided opposite to said light source; and
a light-shielding member for limiting external light incident on said reflecting mirror, wherein said light-shielding member has an optical opening portion, and said reflecting mirror is shaped like a cylindrical surface in which light emitted from said light source and reflected by said reflecting mirror is condensed linearly so that the linearly condensed light is radiated out through said optical opening portion of said light-shielding member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 17, 18, 19)
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13. A shielded reflective device comprising:
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a light source portion including a light-emitting portion;
a reflecting mirror provided opposite to a light-radiating side of said light source portion; and
a douser including an optical opening portion, wherein said shielded reflective device further comprises a substrate portion on which said light source portion is mounted, and a side of said substrate portion on which said light source portion is mounted is black.
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15. A shielded reflective device comprising:
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a light source portion including a light-emitting portion;
a reflecting mirror provided opposite to a light-radiating side of said light source portion; and
a douser including an optical opening portion, wherein said douser is shaped like a film.
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16. A light source comprising:
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a light-emitting element;
a light-transmissive material with which said light-emitting element is sealed; and
a substrate, wherein a portion of said substrate on which said light-emitting element is mounted is made of a heat-dissipation conductive member, and said heat-dissipation conductive member reaches a rear surface of said substrate.
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20. A shielded reflective device comprising:
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a light-emitting element;
a light-transmissive material with which said light-emitting element is sealed; and
a substrate, a reflecting mirror provided opposite to a light-radiating side of said light-emitting element; and
a douser including an optical opening portion, wherein a portion of said substrate on which said light-emitting element is mounted is made of a heat-dissipation conductive member, and said heat-dissipation conductive member reaches a rear surface of said substrate, said light-transmissive material forms a convex lens, and (width of said substrate−
diameter of said convex lens) ≦
1 mm is satisfied.
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Specification