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A laser white light source with simultaneous cooling of laser diode and phosphor film

A technology of laser diode and phosphor film, applied in the field of laser white light source, can solve the problems of limited heat dissipation effect, large overall volume and complicated process, achieve high power and high brightness laser white light illumination, simplify heat dissipation structure, and enhance heat dissipation efficiency Effect

Active Publication Date: 2020-02-14
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a laser white light source in which the laser diode and the phosphor film are simultaneously cooled, wherein the layout design of the laser light path and the structural design of the cooling mechanism make the laser diode and phosphor film The powder film is installed on the same horizontal base, and the heat dissipation effect is enhanced by setting a liquid cooling mechanism on the horizontal base, thereby solving the cumbersome process and complex structure caused by the separate cooling of LD and phosphor powder in the existing laser white light source , the overall volume is large, and the technical problem of limited cooling effect

Method used

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  • A laser white light source with simultaneous cooling of laser diode and phosphor film
  • A laser white light source with simultaneous cooling of laser diode and phosphor film
  • A laser white light source with simultaneous cooling of laser diode and phosphor film

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Embodiment 1

[0029] figure 1 It is a structural schematic diagram of the laser white light source constructed according to the preferred embodiment 1 of the present invention, as figure 1 As shown, the laser white light source includes a laser diode 1 , a lens 2 , a mirror 3 , a phosphor film 4 , a phosphor substrate 5 , a horizontal base 6 and a liquid cooling mechanism 7 . The blue laser light emitted by the laser diode 1 is incident upwards to the lens 2; it is refracted according to the design surface shape of the lens 2, and the light is a collimated beam when it exits the lens 2. The collimated light beam is incident on the mirror surface of the reflector 3 for specular reflection, and the included angle between the reflector 3 and the horizontal plane is θ, and the value ranges from 10° to 45°. After the specular reflection of the reflector 3, the light is incident on the phosphor film 4 placed horizontally at a certain angle, and part of the blue light is absorbed by the phosphor ...

Embodiment 2

[0034] Figure 4 It is a structural schematic diagram of the laser white light source constructed according to the preferred embodiment 2 of the present invention, as Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the reflector 3 is a pair of reflector groups, and its function is to allow the vertically upward incident laser beam to exit vertically downward through two mirror reflections; The included angle between the mirror and the horizontal plane is 45°, the laser beam passing through the reflector 3 is vertically incident on the top surface of the phosphor film 4, and the phosphor film is directly coated on the phosphor substrate 5, and the phosphor substrate 5 is The sapphire substrate or other transparent high thermal conductivity substrate, the two sides of the phosphor substrate 5 are coated with anti-reflection coating, which is used to increase the blue light transmittance, the laser light incident on the phosphor film is partial...

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Abstract

The invention belongs to the field of a laser white light source and discloses a laser white light source for simultaneous cooling of a laser diode and a fluorescent powder film. The laser white lightsource comprises the laser diode, a lens, a reflector, the fluorescent powder film, a fluorescent powder substrate, a horizontal base and a liquid cooling mechanism; the laser diode is taken as a blue light source; the lens emits light from the laser diode in the vertical direction; the reflector reflects the refracted light from the lens to the fluorescent powder film; the fluorescent powder film is mutually matched with the fluorescent powder substrate to convert the light from the reflector into white light for emission; the liquid cooling mechanism is arranged under the horizontal base and is used for reducing the temperature of the horizontal base so as to reduce the temperature of the laser diode and the fluorescent powder film, thereby realizing simultaneous cooling of the laser diode and the fluorescent powder film. Through the laser white light source disclosed by the invention, the efficient simultaneous cooling of the laser diode and the fluorescent powder film is realized,the process is simple, and the operation is convenient.

Description

technical field [0001] The invention belongs to the field of laser white light sources, and more specifically relates to a laser white light source in which a laser diode and a phosphor film are simultaneously cooled. Background technique [0002] Currently, LED lighting is widely used in the field of solid-state lighting. However, there will be a phenomenon of "efficiency drop" in LEDs at high current densities, which limits the application of LEDs in the field of high-brightness lighting. Laser diodes (LDs) are considered to be the next generation of lighting sources, which do not suffer from a drop in efficiency at high current densities and can maintain high luminous efficiency. In addition, compared with LEDs, LDs have a smaller light-emitting area and beam divergence angle, which is conducive to achieving high-brightness lighting. Therefore, LD has great market potential in the field of high-power and high-brightness lighting in the future. [0003] Laser white ligh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21K9/64F21V9/30F21V29/58F21Y115/30
CPCF21K9/64F21V9/30F21V29/58F21Y2115/30
Inventor 罗小兵马预谱胡润张信峰范义文
Owner HUAZHONG UNIV OF SCI & TECH