TWI795436B - Solid state light source device - Google Patents

Abstract

The invention provides a solid state light source device comprising a light source group, a light combining device and a light guiding component, the light source group comprising a laser light source, a diffusing mirror and a fluorescent diffusing mirror, the laser beam generated by the laser light source dividing into two beams, one beam illuminating the diffusing mirror to generate a first color light, and the other beam illuminating the fluorescent diffusing mirror to generate a second color light, the diffusing mirror and the fluorescent diffusing mirror are located in the light combining device, the light combining device is a semi-elliptical hollow mirror, and the light combining device mixes and collects the first color light and the second color light into the light guiding component. The solid state light source device of the invention has a compact structure and can effectively improve the flow brightness of the projector.

Description

solid state light source device

The invention relates to a light source device for a projector, in particular to a solid-state light source device with a simplified structure.

Laser projector is a new type of projection equipment, because the projected image has a larger color gamut, higher brightness, contrast and color saturation, it has been widely concerned by people.

The light beam of the first color emitted by the light source of the previous laser projector light source device, the light beam of the first color is reflected by a two-way dichroic mirror and projected to a fluorescent color wheel to generate a light beam of the second color and A light beam of a third color, a light beam of a second color and a light beam of a third color are reflected by the fluorescent color wheel and then pass through the dichroic mirror; and part of the light beam of the first color passes through the fluorescent color wheel The light color wheel is incident on the other side of the dichroic mirror after being reflected by at least three reflectors, and then combined with the second color and the third color after being reflected by the dichroic mirror. Light is synthesized. Finally, the mixed light beam passes through the light guide and so on to perform the operations of homogenizing the light beam and eliminating the light spot, and the structure of the light source device is complicated.

In view of the above situation, it is necessary to provide a solid-state light source device with a simplified structure.

A solid-state light source device, including a light source group, a light combination device and a light guide assembly, the light source group includes a laser light source, a scattering mirror and a fluorescent scattering mirror, The laser light beam generated by the laser light source is divided into two beams, one beam irradiates the scattering mirror to generate light of the first color, and the other beam irradiates the fluorescent scattering mirror to generate light of the second color. The light scattering mirror is located in the light combination device, the light combination device is a semi-elliptical hollow reflector, and the light combination device mixes the light of the first color and the light of the second color and then projects it into the light. in the light guide assembly.

Compared with the prior art, the solid-state light source device of the present invention, through the high brightness of the laser light source, projects the fluorescent scattering mirror to excite the required color light, and cooperates with the laser light source scattered by the scattering mirror. The colored light is collected by the light combination device and projected into the light guide assembly. The combined light beam has high brightness and bright colors, which can effectively improve the brightness of the projector and has a simplified structure.

100: Solid state light source device

10: Light source group

11:Laser light source

110:Laser generator

12: Diffuser mirror

13: Fluorescent diffuser

14: Lens group

20: Combined light device

30: Light guide component

31: Color wheel

32: Mirror

33, 34: lens

40: Prism group

50:Digital micromirror display device

60:Projection lens group

b: laser beam

B: blue light

Y: yellow light

FIG. 1 is a schematic diagram of the light path of a solid-state light source device in an embodiment of the present invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention.

Please refer to FIG. 1 , which is a schematic diagram of a light path of a solid-state light source device 100 provided by the present invention. The solid-state light source device 100 includes a light source group 10 , a light combination device 20 , a light guide assembly 30 , a prism group 40 , a digital micromirror display device 50 and a projection lens group 60 . The light source group 10 is mainly to generate two-color light with high brightness, and then combine the two-color light into a combined light beam through the light combination device 20 and project it to the light guide assembly 30 to perform the light combination by light refraction. The uniform light of the beam and the operation of eliminating the spot. The light guide assembly 30 is a light pipe (Light Tunnel). The combined light beam passing through the light guide assembly 30 is guided and projected to the prism group 40 by the color wheel 31 and the reflector 32 arranged behind the light guide assembly 30 . A lens 33 is arranged between the color wheel 31 and the reflector 32, and a lens 34 is also arranged between the reflector 32 and the prism group 40, and the lens 33 and the lens 34 are used to gather the Synthetic light beam. The prism group 40 is a reverse total internal reflection prism (RTIR, Reverse Total Internal Reflection) formed by combining two prisms. The prism group 40 first projects the homogenized combined light beam onto the digital micro-mirror display device 50 (DMD, Digital Micro-mirror Device) by total internal reflection. The digital micromirror display device 50 forms an image beam after receiving the combined light beam, and the image beam is refracted back to the projection lens group 60 through the prism group 40, so that the digital micromirror display The image formed by the device 50 can be projected.

The light source group 10 includes a laser light source 11 , a diffuser mirror 12 and a fluorescent diffuser mirror 13 . The laser light source 11 includes at least one laser generator 110 for generating a laser beam b. The scattering mirror 12 and the fluorescent scattering mirror 13 are located in the light combination device 20 . In this embodiment, the laser light source 11 is composed of several laser generators 110 as a group, and the group of laser generators 110 is composed of four to generate a laser beam b with relatively high brightness. The laser beam b generated by the laser light source 11 is divided into two beams, one beam irradiates the scattering mirror 12 to generate divergent first color light, and the other beam irradiates the fluorescent scattering mirror 13 to generate divergent second color light.

The front end of the laser light source 11 has a lens group 14 for collecting the laser beam b emitted by the laser light source 11 . In this embodiment, the laser light beam b is blue light, the first color light is blue light B, and the second color light is yellow light Y.

The light path of the first color light passes through the light combining device 20 located at the front end of the laser light source 11 , and is diffused by the scattering mirror 12 located at the front end of the light combining device 20 to guide the light combining device 20 .

The light-receiving surface of the fluorescent scattering mirror 13 has an illumination area, and the illumination area is irradiated by the laser beam b generated by the laser light source 11 . In this embodiment, the illumination area has a fluorescent layer. Preferably, the fluorescent scattering mirror 13 is a fluorescent glass sheet produced by melting fluorescent powder and glass together, or is incorporated during the crystal growth process. Phosphor crystals produced by the phosphor are then cut into shape. The fluorescent layer is irradiated by the blue laser light beam b of the laser light source 11 to generate yellow light Y, and the light path of the yellow light Y is scattered to the light receiving surface side of the fluorescent scattering mirror 13 The light combination device 20 located outside the fluorescent scattering mirror 13 is reflected by the light combination device 20 and guided to the light guide assembly 30 .

The light combining device 20 is a semi-elliptical hollow mirror, and the scattering mirror 12 and the fluorescent scattering mirror 13 are arranged close to the focal point of the light combining device 20 . The light-combining device 20 receives the blue light B scattered by the scattering mirror 12 and the yellow light Y generated by the light-receiving surface of the fluorescent scattering mirror 13 excited by the laser beam b, and generates the combined light beam after mixing and focusing. projected into the light guide assembly 30 .

The light-combining device 20 receives the high-brightness blue light B of the laser light source 11 and the laser beam b of the laser light source 11 irradiates the yellow light Y generated by the excitation of the fluorescent scattering mirror 13 by the light surface, after mixing and focusing Generating the combined light beam can increase the brightness of the combined light beam. In other words, the two-color light (blue and yellow light) produced by the light source group 10 can increase the brightness of the projector when projected because it contains the high brightness characteristics of the laser light source 11, and can also Adjusting the ratio of the laser light source 11 irradiating the diffuser mirror 12 and the fluorescent diffuser mirror 13 can adjust the color temperature of the projected light to improve the application performance of the portable projector.

The solid-state light source device of the present invention, the combined light beam includes blue light B and yellow light Y generated by laser light, wherein the blue light B is high-intensity laser light generated by laser light source 11, and the yellow light Y is irradiated by laser light source 11 Produced on the light-receiving surface of the fluorescent scattering mirror 13, the combined light beam after being mixed by the light-combining device has high brightness and brighter colors, which can effectively improve the lumen brightness of the projector and has a simplified structure.

In addition, the above description is only the preferred implementation mode of the present invention, and does not limit the present invention in any form. Although the preferred implementation mode of the present invention has been disclosed above, it is not used to limit the present invention. Anyone familiar with this field Those skilled in the art, within the scope of the technical solution of the present invention, can use the technical content disclosed above to make some changes or modify equivalent implementations with equivalent changes, but as long as they do not depart from the technical solution of the present invention, according to the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

100: Solid state light source device

10: Light source group

11:Laser light source

110:Laser generator

12: Diffuser mirror

13: Fluorescent diffuser

14: Lens group

20: Combined light device

30: Light guide component

31: Color wheel

32: Mirror

33, 34: lens

40: Prism group

50:Digital micromirror display device

60:Projection lens group

b: laser beam

B: blue light

Y: yellow light

Claims (10)

A solid-state light source device, characterized in that it includes a light source group, a light combining device and a light guide assembly, the light source group includes a laser light source, a scattering mirror and a fluorescent scattering mirror, the laser light generated by the laser light source The light beam is divided into two beams, one beam irradiates the scattering mirror to produce a first color light that is the same color as the laser beam, and the other beam irradiates the fluorescent scattering mirror to produce a second color light that is different from the laser beam color , the scattering mirror and the fluorescent scattering mirror are located in the light-combining device, the light-combining device is a semi-elliptical hollow reflector, the first color light emitted by the scattering mirror and the light of the fluorescent scattering mirror The emitted second color light is incident on the light combination device, and the light combination device mixes the first color light and the second color light and projects them into the light guide assembly. The solid-state light source device according to Claim 1, wherein: the laser light beam is blue light, the first color light is blue light, and the second color light is yellow light. The solid-state light source device as claimed in claim 1, wherein: the light path of the first color light is passed through the light combination device located at the front end of the laser light source, and then passed through the light combination device located in the light combination device The scattering mirror guides the scattering to the light combining device. The solid-state light source device according to Claim 1, wherein: the front end of the laser light source has a lens group, and the lens group is used to gather the laser beam emitted by the laser light source. The solid-state light source device as claimed in claim 1, wherein: the laser light source includes at least one laser generator for generating a laser beam. The solid-state light source device according to claim 1, wherein: the light-receiving surface of the fluorescent scattering mirror has an illumination area, and the illumination area is irradiated by the laser beam generated by the laser light source. The solid-state light source device according to claim 6, wherein: the illumination area has a fluorescent layer, and the fluorescent layer is excited by the laser light source to generate light of a second color. The solid-state light source device as described in Claim 6, wherein: the fluorescent scattering mirror is a fluorescent glass sheet produced by melting fluorescent powder and glass together, or a fluorescent glass sheet produced by adding fluorescent substances during the crystal growth process. Optical crystals cut to shape. The solid-state light source device according to claim 1, wherein: the light path of the second color light passes through the light-receiving surface side of the fluorescent scattering mirror to the combined light located outside the fluorescent scattering mirror device, and is reflected by the light combination device and guided to the light guide assembly. The solid-state light source device according to claim 1, wherein: the scattering mirror and the fluorescent scattering mirror are arranged close to the focal point of the light combining device.

Images