COLOR LIGHT-EMITTING DIODE

摘要

PROBLEM TO BE SOLVED: To provide a color light-emitting diode capable of easily obtaining not only white light but also high-luminance visible light with a desired color in an LED, having an LED chip for emitting blue-based visible light and a phosphor for converting light emitted by the LED chip to yellowish green-based visible light.

SOLUTION: A recess nearly in a funnel shape in which a pore size gradually increases toward the upper part from the bottom surface is provided in a first lead frame 12 for mounting an LED chip, and a reflector 14 is formed with the inner surface of the recess as a reflection surface. An LED chip 16 for emitting blue-based visible light is connected and fixed on the bottom surface of the reflector 14 by die-bonding. The LED chip 16 is coated and sealed with a coating material 22 made of a light-transmitting material. A number of phosphors 24 having pigment to which a red-based pigment 24b is adhered are mixed into the coating material 22 in a dispersed state on the surface of a polychromatic luminous phosphor 24a for radiation, by converting light emitted by the LED chip 16 to two-color visible light of yellowish green-based visible light and red-based visible light.

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