Solid state light source

Abstract

The invention relates to a solid-state lighting device, which comprises a body, a first luminescence unit, a second luminescence unit and a third luminescence unit, wherein a first containing groove, a second containing groove and a third containing groove are arranged in the body; the first luminescence unit which includes a first solid luminescence chip on which a first packing layer is covered is arranged in the first containing groove; the second luminescence unit which includes a second solid luminescence chip on which a second packing layer is covered is arranged in the second containing groove; the third luminescence unit which comprises a third solid luminescence chip on which a third packing layer is covered is arranged in the third containing groove. The first, the second and the third solid luminescence chip have the same color tone. At least two of the first, the second and the third packing layers contain different fluorescent powder respectively. The light coming through the first, the second and the third packing layers are mixed to form white light.

Description

technical field [0001] The invention relates to a solid-state light source device, in particular to a light-emitting diode light source device. Background technique [0002] At present, light emitting diode (Light Emitting Diode, LED), as a solid-state lighting device, gradually replaces cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL) because of its good light quality (that is, the spectrum output by the light source) and high luminous efficiency. As the light-emitting element of the lighting device, for details, please refer to the article "Solid-State Lighting: Toward Superior Illumination" published by Michael S. Shur et al. in the document Proceedings of the IEEE, Vol.93, No.10 (October 2005). [0003] When light-emitting diodes are used as lighting sources, high color rendering (ie, CRI greater than 90) is usually required. A light-emitting diode with relatively high color rendering, comprising a blue light-emitting diode chip, a red light-emitting ...

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Problems solved by technology

[0004] The blue light emitting diode chip and the red light emitting diode chip adopt different light emitting diode chips, that is, the blue light emitting diode chip is a GaN light emitting diode chip, and the red light emitting diode chip is an AlGaInP light emitting diode chip, so when the blue light emitting diode chip When the temperature of the diode chip and the red light emitting diode chip rises, the degree of light attenuation is different, that is, the degree of light attenuation of the red light emitting diode chip is relatively large, causing the color temperature of the light emitted by the light emitting diode to be blue (Blue-shift), and then As a result, the color temperature stability of the white light emitted by the LED is poor

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