A laser white light illumination source with adjustable color temperature

Abstract

The invention discloses a laser white light illuminating light source with adjustable color temperature. The laser white light illuminating light source comprises an excitation light source body, a radiating device of the excitation light source body, a fluorescent powder layer, a regulating device of the fluorescent powder layer, and two reflection cups, wherein the excitation light source is embedded into the radiating device and makes full contact with the radiating device; the fluorescent powder layer is closely attached to the regulating device, the thickness of the fluorescent powder layer is adjusted through the regulating device, and thus the color temperature is changed; the fluorescent powder layer and the regulating device of the fluorescent powder layer are arranged between thefirst reflection cup and the second reflection cup, the excitation light source extends into a light incident port of the first reflection cup, and lights reflected or scattered backwards or laterally are emitted forwards again through the first reflection cup; and the color temperature can be continuously controlled through the fluorescent powder layer and the regulating device thereof on the basis that the lighting effect is maximized, wide-spectrum lights are emitted by the fluorescent powder layer excited by the excitation light source body and form white lights with a part of unabsorbedlight source body, and the white lights are emitted outwards through the second reflection cup. Through the method, the color temperature can be adjusted, and the light source utilization rate is high.

Description

technical field [0001] The invention relates to the field of laser lighting, in particular to a laser white light lighting source with adjustable color temperature. Background technique [0002] In 1991, Shuji Nakamura developed a high-brightness blue light emitting diode (Light Emitting Diode, hereinafter referred to as LED) and a blue laser diode (Laser Diode, hereinafter referred to as LD) based on gallium nitride, making white light lighting based on LED possible. At present, LED light sources have been relatively popular, and are widely used in display screens, traffic lights, automotive lights, and lighting sources. Although the LED light source is highly efficient and energy-saving, it has high luminance limitations, serious luminous efficiency declines with the increase of power, etc., which also gave birth to the idea of ​​replacing the excitation light source with blue light or near-ultraviolet LD. [0003] At present, the popular LED light source also has a metho...

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Problems solved by technology

Although the LED light source is highly efficient and energy-saving, it has high luminance limitations, serious luminous efficiency declines with the increase of power, etc., which also gave birth to the idea of ​​replacing the excitation light source with blue light or near-ultraviolet LD

[0003] At present, the popular LED light source also has a method to adjust the color temperature, such as red, green and blue three-color lamp beads, adjust the ratio of the lighted lamp beads of each color to control the color temperature, there are also various color temperature lamp beads, adjust the light of different color temperature lamp beads to control The method of color temperature, these methods have low utilization rate of light source, and the adjustment is not continuous

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