Light-emitting diode
First Claim
1. A light-emitting diode comprising:
- a light-emitting element; and
a fluorescent face made of a fluorescent substance containing at least one of inorganic and organic fluorescent materials and applied on a highly reflective material;
wherein a light is extracted externally from a side of said fluorescent face irradiated with light emitted from said light-emitting element.
1 Assignment
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Accused Products
Abstract
In an LED, when electric power is supplied to a blue light-emitting element through a pair of leads, light is emitted upward from an upper surface of the blue light-emitting element and, at the same time, light is radiated from side and lower surfaces of the blue light-emitting element so that a fluorescent substance is irradiated with the light. The latter light is reflected by a front surface of the fluorescent substance or by a concave reflecting mirror serving as a highly reflective material, so that the reflected light is radiated upward as excitation light (fluorescence) or as irradiation light. Because a radiating surface of a convex lens is formed above the concave reflecting mirror, the excitation light and irradiation light emitted thus are condensed by the convex lens and radiated externally with high external radiation efficiency.
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Citations
10 Claims
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1. A light-emitting diode comprising:
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a light-emitting element; and
a fluorescent face made of a fluorescent substance containing at least one of inorganic and organic fluorescent materials and applied on a highly reflective material;
wherein a light is extracted externally from a side of said fluorescent face irradiated with light emitted from said light-emitting element. - View Dependent Claims (2, 3, 4, 5, 7)
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6. A light-emitting diode comprising:
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a light-emitting element;
a reflecting substrate on which said light-emitting element is disposed;
a cylindrical reflecting frame which is disposed on said reflecting substrate so as to surround said light-emitting element in a hollow portion of said reflecting frame;
a fluorescent face made of a fluorescent substance containing a fluorescent material applied so as to surround said light-emitting element on an area defined by an inner circumferential surface of said reflecting frame and a surface of said reflecting substrate which is exposed from said reflecting frame.
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8. A light emitting diode comprising:
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a light-emitting element;
a reflecting substrate opposed to said light-emitting element and having a surface shaped like a paraboloid of revolution focused on the light-emitting element;
wherein a fluorescent substance containing a fluorescent material is applied on the reflecting substrate to thereby form a fluorescent face. - View Dependent Claims (9, 10)
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Specification