TW202011104A - 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 projector light source device, in particular to a solid-state light source device with a simplified structure.

The laser projector is a new type of projection equipment. Because the image it projects has a larger color gamut, higher brightness, contrast, and color saturation, it has received widespread attention.

The first color light beam emitted by the light source of the previous laser projector light source device is reflected by a two-way dichroic mirror and projected onto a fluorescent color wheel to produce a second color light beam and A third color beam, the second color beam and the third color beam are reflected by the fluorescent color wheel and then pass through the two-way dichroic mirror; and part of the first color beam passes through the fluorescent After the light color wheel is reflected by at least three mirrors, it is incident on the other side of the two-way dichroic mirror, and after being reflected by the two-way dichroic mirror, the second color and the third color Light is combined. Finally, the mixed beam passes through the light pipe to uniformize the beam and eliminate the light spot. 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 includes a light source group, a light combining device and a light guide component, the light source group includes a laser light source, a scattering mirror and a fluorescent scattering mirror, the laser beam generated by the laser light source is divided into two Beam, one beam illuminating the diffuser produces first color light, the other beam illuminates the fluorescent diffuser producing second color light, the diffuser and the fluorescent diffuser are located in the light combining device, The light combining device is a half-ellipsoidal hollow mirror, and the light combining device mixes and condenses the first color light and the second color light to project into the light guide assembly.

Compared with the prior art, the solid-state light source device of the present invention projects the fluorescent diffuser through the high brightness of the laser light source to excite the desired color light, and then cooperates with the laser light source diffused by the diffuser The color light is collected by the light combining device and projected into the light guide assembly. The light beam of the light combining is high in brightness and bright in color, which can effectively improve the lumen of the projector and have a simple structure.

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

Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

All technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terminology used in the description of the present invention herein is 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 an optical 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 combining device 20, a light guide assembly 30, a diamond mirror group 40, a digital micromirror display device 50, and a projection lens group 60. The light source group 10 mainly consists of generating dichroic light with high brightness, and then the dichroic light is collected by the light combining device 20 into a light combining beam and projected to the light guide assembly 30 to perform the light combining by refraction of light The operation of beam uniformity and elimination of light 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 diamond mirror group 40 by the color wheel 31 and the reflection mirror 32 provided behind the light guide assembly 30. A lens 33 is provided between the color wheel 31 and the reflecting mirror 32, and a lens 34 is also provided between the reflecting mirror 32 and the diamond group 40. The lens 33 and the lens 34 are used to gather the Combined beam. The diamond group 40 is a reverse total internal reflection (RTIR) formed by a combination of two diamonds (RTIR). The diamond mirror group 40 first projects the combined light beam subjected to the uniform light treatment onto the digital micro-mirror device (DMD, Digital Micro-mirror Device) 50 by total internal reflection. After receiving the combined light beam, the digital micromirror display device 50 forms an image beam, and the image beam is then refracted by the diamond lens group 40 to the projection lens group 60, so that the digital micromirror displays The image formed by the device 50 can be projected.

The light source group 10 includes a laser light source 11, a diffusion mirror 12, and a fluorescent diffusion 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 combining device 20. In this embodiment, the laser light source 11 is composed of several laser generators 110, and the laser generator 110 is composed of four groups, and generates a laser beam b with higher brightness. The laser beam b generated by the laser light source 11 is divided into two beams, one beam illuminating the diffuser 12 produces divergent first color light, and the other beam illuminates the fluorescent diffuser 13 producing 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 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 scattered by the scattering mirror 12 located at the front end of the light combining device 20 to the light combining device 20.

The light-receiving surface of the fluorescent scattering mirror 13 has an illumination area, and the illumination area is illuminated by the laser beam b generated by the laser light source 11. In this embodiment, the light-emitting area has a fluorescent layer. Preferably, the fluorescent scattering mirror 13 is a fluorescent glass sheet produced by sintering fluorescent powder and glass together, or it is incorporated during the crystal growth process The fluorescent crystal produced by the fluorescent substance is then cut into shapes. The fluorescent layer is excited by the blue laser beam b of the laser light source 11 to generate yellow light Y, and the light path of the yellow light Y is scattered toward the light receiving surface side of the fluorescent scattering mirror 13 toward The light combining device 20 located outside the fluorescent scattering mirror 13 is reflected by the light combining device 20 and guided to the light guide assembly 30.

The light combining device 20 is a half-ellipsoidal hollow mirror, and the scattering mirror 12 and the fluorescent scattering mirror 13 are disposed near 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 laser beam b on the light-receiving surface of the fluorescent scattering mirror 13, and generates the light combining beam after being mixed and condensed. Projection into the light guide assembly 30.

The light combining device 20 receives the high-intensity blue light B of the laser light source 11 and the laser beam b of the laser light source 11 to irradiate the yellow light Y generated by the light-scattering surface of the fluorescent scattering mirror 13 after being mixed and condensed The generation of the combined light beam can increase the brightness of the combined light beam. In other words, the dichroic light (blue and yellow color light) generated by the light source group 10 includes the high brightness characteristic of the laser light source 11, so the brightness of the projector when projecting can be increased and can be adjusted together The ratio of the laser light source 11 illuminating the diffuser mirror 12 and the fluorescent diffuser mirror 13 freely adjusts the color temperature of the projected light to improve the application efficiency of the portable projector.

In 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, wherein the blue light B is a high-intensity laser generated by the laser light source 11, and the yellow light Y is irradiated by the laser light source 11 Produced by the light-receiving surface of the fluorescent scattering mirror 13, the light beam combined by the light combining device has high brightness and brighter colors, which can effectively improve the brightness of the projector and simplify the structure.

In addition, the above is only the preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has disclosed the preferred embodiment as above, it is not intended to limit the present invention. Anyone who is familiar with this profession Technical personnel within the scope of the technical solution of the present invention, when the above disclosed technical content can be used to make some changes or modifications to equivalent equivalent implementations, but those who do not deviate from the technical solution content of the present invention, according to the present invention Any simple modifications, equivalent changes, and modifications made to the above embodiments by the technical essence of the technology still fall within the scope of the technical solutions of the present invention.

100: solid-state light source device 10: Light source group 11: Laser light source 110: Laser generator 12: Diffuse mirror 13: Fluorescence diffuser 14: lens group 20: Light combining device 30: Light guide assembly 31: Color wheel 32: Mirror 33, 34: lens 40: Diamond Mirror 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 an optical path of a solid-state light source device in an embodiment of the present invention.

no

100: solid-state light source device

10: Light source group

11: Laser light source

110: Laser generator

12: Diffuse mirror

13: Fluorescence diffuser

14: lens group

20: Light combining device

30: Light guide assembly

31: Color wheel

32: Mirror

33, 34: lens

40: Diamond Mirror 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 component, 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 illuminates the diffuser mirror to generate a first color light, and the other beam illuminates the fluorescent diffuser mirror to generate a second color light. The diffuser mirror and the fluorescent diffuser mirror are located at the combined In the light device, the light combining device is a half-ellipsoidal hollow mirror, and the light combining device mixes and condenses the first color light and the second color light and projects the light into the light guide assembly. The solid-state light source device according to item 1 of the patent application scope, wherein the laser 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 described in item 1 of the patent application range, wherein: the light path of the first color light passes through the light combining device at the front end of the laser light source and is located at the light combining device The scattering mirror in is directed to the light combining device by scattering. The solid-state light source device as described in item 1 of the patent application scope, wherein: the front end of the laser light source has a lens group for collecting the laser beam emitted by the laser light source. The solid-state light source device as described in item 1 of the patent application scope, wherein the laser light source includes at least one laser generator for generating a laser beam. The solid-state light source device according to item 1 of the patent application scope, wherein the light-receiving surface of the fluorescent scattering mirror has an illumination area, and the illumination area is illuminated by the laser beam generated by the laser light source. The solid-state light source device as described in item 6 of the patent application range, wherein the illumination area has a fluorescent layer, and the fluorescent layer is excited by the laser light source to generate a second color light. The solid-state light source device as described in item 6 of the patent application scope, wherein: the fluorescent scattering mirror is a fluorescent glass sheet produced by melting fluorescent powder and glass together, or a fluorescent substance is added during crystal growth The resulting fluorescent crystal is cut to shape. The solid-state light source device as described in item 1 of the patent application range, wherein: the light path of the second color light passes through the side of the light-receiving surface of the fluorescent diffuser toward the location outside the fluorescent diffuser The light combining device is reflected by the light combining device and guided to the light guide assembly. The solid-state light source device as described in item 1 of the patent application range, wherein the diffusion mirror and the fluorescent diffusion mirror are disposed near the focal point of the light combining device.

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