Miniature laser white light source based on blue laser chip

Abstract

The invention discloses a miniature laser white light source based on a blue laser chip. The light source comprises a reflecting mirror, a blue light laser chip located on the incident side of the reflecting mirror and a fluorescent material located on the emergent side of the reflecting mirror, emergent light beams of the blue light laser chip reach the fluorescent material through the reflecting mirror, and the fluorescent material emits white light under the action of the emergent light beams of the blue light laser chip. The invention has the advantages of small volume, large emergent luminous flux, concentrated light beam and the like.

Description

Technical Field

[0001] The invention relates to the field of laser lighting, in particular to a micro laser white light source based on a blue laser chip. Background Art

[0002] At present, the existing laser lighting is remote fluorescence excitation. It uses a blue laser as the light source, which is focused on the fluorescent material through a lens group to excite the fluorescent material to emit white light. The disadvantage is that the entire light source is large in size, resulting in high optical path loss and low efficiency. Summary of the invention

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide a novel micro laser white light source based on a blue laser chip.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a technical solution: a micro laser white light source based on a blue laser chip, comprising: a reflector, a blue laser chip located on the incident side of the reflector and a fluorescent material located on the exit side of the reflector, the exit light beam of the blue laser chip reaches the fluorescent material through the reflector, and the fluorescent material emits white light under the action of the exit light beam of the blue laser chip.

[0005] As a preferred solution for a micro laser white light source based on a blue laser chip, the front side of the fluorescent material faces upward and the back side faces downward; the blue laser chip is beside the fluorescent material, and the emission direction of the blue laser chip is upward; the reflector is located above the blue laser chip, and the reflector is configured to reflect the outgoing light beam from the blue laser chip to the front side of the fluorescent material.

[0006] As a preferred solution of the micro laser white light source based on the blue laser chip, a focusing lens is arranged between the blue laser chip and the reflector.

[0007] As a preferred solution for the micro laser white light source based on the blue laser chip, the fluorescent material is selected from fluorescent powder, fluorescent glass, fluorescent ceramic or fluorescent crystal.

[0008] As a preferred solution for a micro laser white light source based on a blue laser chip, the substrate of the fluorescent material is selected from one or more of Ce:YAG, Ce:LuAG, Ce:TAG, Ce:GYAG, Ce:GGAG, and Ce:GLuAG.

[0009] As a preferred solution for a micro laser white light source based on a blue laser chip, the fluorescent material has an anti-reflection film layer on the front side and a full reflection film layer on the back side.

[0010] As a preferred solution for the micro laser white light source based on a blue laser chip, the wavelength of the output light beam of the blue laser chip is in the range of 440-460 nm, and a chip with an output light power greater than 500 mW is particularly preferred.

[0011] As a preferred solution for a micro laser white light source based on a blue laser chip, the fluorescent material is provided with a material packaging base plate; preferably, the front side of the material packaging base plate and the back side of the fluorescent material are fixedly connected by gluing, welding or coating.

[0012] As a preferred solution for a micro laser white light source based on a blue laser chip, the blue laser chip is provided with a chip packaging base plate; preferably, the front side of the chip packaging base plate and the back side of the blue laser chip are fixedly connected by a gold-tin alloy eutectic phase.

[0013] As a preferred solution for the micro laser white light source based on the blue laser chip, the reflective surface of the reflector is a flat surface or a curved surface; preferably, the reflector is made of glass or metal coating.

[0014] Compared with the prior art, the beneficial effects of the present invention are at least: optimizing the layout structure of the blue laser chip and the fluorescent material, using a reflector, or a reflector and a focusing lens, so that the light source has the advantages of small size, large output light flux, and concentrated light beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention. Implementation

[0016] The present invention is further described in detail below by means of specific embodiments in combination with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0017] See also Figure 1 , the figure shows a micro laser white light source based on a blue laser chip.

[0018] The micro laser white light source includes: a fluorescent material 1, a blue laser chip 2, a reflector 3, etc.

[0019] The front side of the fluorescent material 1 faces upward, and the back side faces downward.

[0020] Preferably, the fluorescent material 1 can be selected from fluorescent powder, fluorescent glass, fluorescent ceramics (single phase or multiphase) or fluorescent crystal. The substrate of the fluorescent material 1 can be selected from one or more components emitting yellow light, green light or red light such as Ce:YAG, Ce:LuAG, Ce:TAG, Ce:GYAG, Ce:GGAG, Ce:GLuAG, etc.

[0021] Preferably, the fluorescent material 1 includes but is not limited to a circular, square or elliptical structure. The fluorescent material 1 is of miniature size, with a side length (diameter) less than 10 mm.

[0022] Preferably, the fluorescent material 1 has an anti-reflection film layer on the front side and a total reflection film layer on the back side.

[0023] Preferably, the fluorescent material 1 is provided with a material packaging base plate 4. The material packaging base plate 4 and the fluorescent material 1 can be fixedly connected by gluing, welding, coating, etc. The material packaging base plate 4 is used to dissipate heat from the fluorescent material 1. Furthermore, the material packaging base plate 4 is made of a material with high thermal conductivity, a thermal conductivity greater than 10W / mk, and simple processing, such as gold, silver, copper, aluminum, ceramics, etc.

[0024] The blue laser chip 2 is beside the fluorescent material 1. The number of the blue laser chip 2 is more than one. The emission direction of the blue laser chip 2 is upward.

[0025] Preferably, the wavelength of the output light of the blue laser chip 2 is in the range of 440-460 nm, and a chip with an output light power greater than 500 mW is particularly preferred.

[0026] Preferably, the blue laser chip 2 is provided with a chip packaging base plate 5. The chip packaging base plate 5 and the blue laser chip 2 are fixed by gold-tin alloy eutectic. The chip packaging base plate 5 is not only used to dissipate heat from the blue laser chip 2, but also used to provide power to the blue laser chip 2. Furthermore, the chip packaging base plate 5 is made of a material with high thermal conductivity, greater than 10W / mk, and simple processing, such as gold, silver, copper, aluminum, ceramics, etc.

[0027] The reflector 3 is located above the blue laser chip 2. The blue laser chip 2 is on the incident side of the reflector 3. The fluorescent material 1 is on the exit side of the reflector 3. The reflector 3 is configured to reflect the exit light beam from the blue laser chip 2 to the front of the fluorescent material 1. The fluorescent material 1 emits white light under the action of the exit light beam of the blue laser chip 2.

[0028] Preferably, the reflective surface of the reflector 3 can be a flat surface or a curved surface.

[0029] Preferably, the reflector 3 can be made of glass or metal coating, and the metal coating is aluminum film, silver film or dielectric film.

[0030] The micro laser white light source further comprises: a focusing lens 6. The focusing lens 6 is between the blue laser chip 2 and the reflector 3. The focusing lens 6 is used to focus the outgoing light beam of the blue laser chip 2.

[0031] Preferably, the focusing lens 6 is a lens with a diameter less than 4 mm. Example

[0032] The miniature white light source is square and has an overall size of 10mm*10mm. Four blue lasers with an optical power of 2W are vertically upward using a gold-tin alloy eutectic and a chip packaging base plate 5. A 2mm convex lens is used to focus the blue laser, and a concave reflector 3 is used to reflect and focus the laser to the surface of the fluorescent ceramic. The fluorescent ceramic is a complex fluorescent ceramic, and the light-collecting material is Ce:YAG, and the complex phase material is Al2O3. The output luminous flux of the miniature white light source is measured to be 2153lm, the color temperature is 6000K, and the color rendering index is 71.

[0033] The above only expresses the implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A micro laser white light source based on a blue laser chip, characterized in that: include: A reflector, a blue laser chip located on the incident side of the reflector, and a fluorescent material located on the exit side of the reflector. The exit light beam of the blue laser chip reaches the fluorescent material through the reflector, and the fluorescent material emits white light under the action of the exit light beam of the blue laser chip.

2. The micro laser white light source based on a blue laser chip according to claim 1, characterized in that: The front side of the fluorescent material faces upward, and the back side faces downward; the blue light laser chip is located beside the fluorescent material, and the emission direction of the blue light laser chip is upward; the reflector is located above the blue light laser chip, and the reflector is configured to reflect the emission light beam from the blue light laser chip to the front side of the fluorescent material.

3. The micro laser white light source based on a blue laser chip according to claim 1 or 2, characterized in that: A focusing lens is arranged between the blue laser chip and the reflector.

4. The micro laser white light source based on a blue laser chip according to claim 1 or 2, characterized in that: The fluorescent material is selected from fluorescent powder, fluorescent glass, fluorescent ceramics or fluorescent crystals.

5. The micro laser white light source based on a blue laser chip according to claim 4, characterized in that: The substrate of the fluorescent material is selected from one or more of Ce:YAG, Ce:LuAG, Ce:TAG, Ce:GYAG, Ce:GGAG, and Ce:GLuAG.

6. The micro laser white light source based on a blue laser chip according to claim 1 or 2, characterized in that: The fluorescent material has an anti-reflection film layer on the front side and a total reflection film layer on the back side.

7. The micro laser white light source based on a blue laser chip according to claim 1 or 2, characterized in that: The wavelength of the output light beam of the blue laser chip is in the range of 440-460 nm, and a chip with an output light power greater than 500 mW is particularly preferred.

8. The micro laser white light source based on a blue laser chip according to claim 1 or 2, characterized in that: The fluorescent material is provided with a material packaging bottom plate; preferably, the front side of the material packaging bottom plate and the back side of the fluorescent material are fixedly connected by gluing, welding or coating.

9. The micro laser white light source based on a blue laser chip according to claim 1 or 2, characterized in that: The blue laser chip is provided with a chip packaging base plate; preferably, the front side of the chip packaging base plate and the back side of the blue laser chip are fixedly connected by a gold-tin alloy eutectic phase.

10. The micro laser white light source based on a blue laser chip according to claim 1 or 2, characterized in that: The reflecting surface of the reflector is a flat surface or a curved surface; preferably, the reflector is made of glass or metal coating.

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