White-light illumination device based on laser excitation fluorescent powder and implementation method of white-light illumination device

Abstract

The invention relates to a white-light illumination device based on laser excitation fluorescent powder. The white-light illumination device comprises a column body. An opening is formed in the side face of the column body. A laser light source is arranged at the opening. The upper portion of the column body is provided with a light output face. A reflector is arranged at the bottom of the column body. The column body is internally filled with the fluorescent powder. A laser beam is cast into the opening of the column body through a laser device. Laser illuminates the fluorescent powder located inside the column body, so that white light or monochromatic light is emitted. Part of the white light or monochromatic light is emitted along a light transmitting mirror at the top of the column body; part of the white light or monochromatic light is refracted through the reflector at the bottom of the column body and then emitted through the light transmitting mirror; and due to the total reflection principle, part of unabsorbed laser can continue to excite the fluorescent powder inside the column body, and white light or monochromatic light is generated through excitation continuously. By means of the white-light illumination device, the problem that the fluorescent powder is overheated is effectively solved; the light output face can be changed; a small amount of fluorescent powder is needed; the structure is varied and simple; and production cost is effectively lowered.

Description

technical field [0001] The invention relates to the field of solid-state light source design, in particular to a white light lighting device based on laser-excited fluorescent powder and a realization method thereof. Background technique [0002] At present, the solid-state light sources used in the lighting field are mainly white LEDs. The way of using blue chips and phosphors of different colors to achieve white light output is currently the mainstream solution for white LED lighting, but because of the "droop" phenomenon, it can only work in relatively low Under the low driving power density, the luminous flux generated by a single blue LED device is limited, which brings difficulty to reduce the cost of the device. [0003] Because there is no "droop" phenomenon, laser diodes become the best substitute for LEDs, which have many advantages: (1) The laser beam is approximately perpendicular to the light-emitting surface, with high light-emitting efficiency, high photoelect...

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Problems solved by technology

[0006] In view of this, the purpose of the present invention is to propose a white light lighting device based on laser-excited phosphor powder and its implementation method, which effectively solves the problem of phosphor overheating, can change the light-emitting surface, requires less phosphor, and has a changeable structure. Simple structure, effectively reduce production cost

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