TWI766093B - Solid state light source device - Google Patents

Abstract

The invention provides a solid state light source device comprising at least one light source group, a conversion device, at least one light combining device and a light guiding component, wherein the light source group is used for projecting a monochromatic light having high intensity to the conversion device. The conversion device converts the monochromatic light into white mixed light, the light combining device is an elliptical mirror, the conversion device is disposed on the first focus of the light combining device, and the light guiding component is disposed at the second focus of the light combining device, the white mixed light converted by the conversion device is transmitted from the first focus of the light combining device, and is mixed and concentrated by the light combining device and projected into the light guiding component at the second focus. 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 present invention relates to a projector light source device, in particular to a solid-state light source device with a simplified structure.

Laser projector is a new type of projection equipment, which has attracted widespread attention because of its projected images with larger color gamut, higher brightness, contrast and color saturation.

The first color light beam emitted by the light source of the previous laser projector light source device, the first color light beam is reflected by a two-way dichroic mirror and then projected to a fluorescent color wheel to generate a second color light beam and A light beam of a third color, the light beam of the second color and the light beam of the 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. 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, it is combined with the second color and the third color. Light is combined. Finally, the mixed light beam passes through the light pipe and the like to perform the operation of uniform light beam and light spot elimination, 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 compact structure.

A solid-state light source device, comprising at least one light source group, a conversion device, at least one light combining device and a light guide assembly, the light source group is used to project a high-intensity light source to the conversion device. The conversion device converts the monochromatic light into white mixed light, the light combining device is an elliptical reflecting mirror, and the converting device is arranged on the first focus of the light combining device , the light guide component is arranged on the second focus of the light combining device, the white mixed light converted by the conversion device is transmitted from the first focus of the light combining device, and passes through the light combining device After the mixed light is condensed, the light is projected into the light guide component at the second focal point.

Compared with the prior art, the solid-state light source device of the present invention projects the conversion device through the high-brightness laser beam of the laser light source, so as to excite the required white mixed light. The white mixed light is collected and projected into the light guide component through the light combining device, and the mixed light beam has high brightness and bright colors, which can effectively improve the luminous brightness of the projector and has a simplified structure.

100, 200, 300, 400, 500: Solid state light source devices

10: Light source group

11: Laser light source

110: Laser generator

12: Lens group

13: Reflector

20: Conversion device

21: Light Zone

30, 50: Combined light device

40: Light guide components

b: laser beam

W: white mixed light

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

FIG. 2 is a schematic diagram of a light path of a solid-state light source device in a second embodiment of the present invention.

3 is a schematic diagram of a light path of a solid-state light source device in a third embodiment of the present invention.

4 is a schematic diagram of a light path of a solid-state light source device in a fourth embodiment of the present invention.

FIG. 5 is a schematic diagram of a light path of a solid-state light source device in a fifth embodiment of the present invention.

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

Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope 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 terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are 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 according to the first embodiment of the present invention. The solid-state light source device 100 includes a light source group 10 , a conversion device 20 , a light combining device 30 and a light guide assembly 40 . The light source group 10 mainly generates monochromatic light with high intensity, and then converts the monochromatic light into white mixed light through the conversion device 20 , and then collects the mixed light into a composite light through the light combining device 30 . The light beam is projected to the light guide component 40 to perform the operations of homogenizing and eliminating the light spot of the combined light beam by light refraction. The light guide assembly 40 is a light pipe (Light Tunnel). The combined light beam passing through the light guide assembly 40 is then guided and projected by a lens (not shown) to a reverse total internal reflection (RTIR) mirror group, and projected to a total internal reflection (RTIR). On an external digital micro-mirror display device (DMD, Digital Micro-mirror Device). The digital micromirror display device forms an image beam after receiving the combined light beam, and then reversely refracts the image beam to a projection lens group through the diamond mirror group, so that the digital micromirror display device constitutes an image beam. Images can be projected.

The light source group 10 includes a laser light source 11 , a lens group 12 and a reflector 13 . The laser light source 11 includes at least one laser generator 110 for generating a monochromatic laser beam b with high intensity. The laser beam b is blue light. In this embodiment, the laser light source 11 is composed of a plurality of laser generators 110 , and the group of laser generators 110 is composed of four, and generates a laser beam b with high brightness. The lens group 12 is located at the front end of the laser light source 11 , and the lens group 12 is used for collecting the laser beam b emitted by the laser light source 11 . The laser light source 11 is located on one side of the light combining device 30 . The light path of the laser light source 11 is located in the light combining device after passing through the lens group 12 located at the front end of the laser light source 11 . The mirror 13 at the front end of 30 is reflected and guided to the conversion device 20 .

The converting device 20 is located in the light combining device 30 , and a light receiving surface of the converting device 20 has an illumination area 21 , and the illumination area 21 is irradiated by the laser beam b generated by the laser light source 11 . In this embodiment, the illumination area 21 has a fluorescent layer. Preferably, the illumination area 21 is a fluorescent glass sheet produced by melting phosphor powder and glass together, or a fluorescent glass sheet is added during the crystal growth process. The fluorescent crystals produced by the light substance are then cut to shape. When the fluorescent layer is irradiated by the blue laser beam b of the laser light source 11 , a yellow light will be generated, and a blue light will be obtained by reflection, thereby obtaining the white mixed light W.

The light path of the white mixed light W is scattered to the light combining device 30 outside the converting device 20 through the light receiving surface illumination area 21 side of the converting device 20 , and is reflected by the light combining device 30 . Guide the light guide assembly 40 .

The light combining device 30 is an elliptical reflecting mirror, the light receiving surface of the converting device 20 is arranged on the first focus of the light combining device 30 , and the light guide assembly 40 is arranged on the light combining device 30 . on the second focus. The light combining device 30 receives the blue light transmitted from its first focal point and the yellow light generated by the excitation of the fluorescent layer by the laser beam b, and generates the white mixed light W after being mixed and concentrated, and projected. into the light guide assembly 40 at the second focal point.

Please refer to FIG. 2 , which is a schematic diagram of a light path of a solid-state light source device 200 according to a second embodiment of the present invention. It differs from the solid-state light source device 100 in the first embodiment in that the light combining device 30 is two elliptical mirrors disposed opposite to each other. It can project the blue light from its first focal point and the yellow light generated by the excitation of the fluorescent layer by the laser beam b into the light guide component 40 more completely.

Please refer to FIG. 3 , which is a schematic diagram of a light path of a solid-state light source device 300 according to a third embodiment of the present invention. The difference from the solid-state light source device 100 in the first embodiment is that the light source groups 10 are two groups, and the two groups of the light source groups 10 are respectively disposed on both sides of the light combining device 30 . The laser beams b emitted by the laser light sources 11 of the two light source groups 10 are respectively focused by the corresponding lens groups 12 . Collected, and are respectively reflected and guided into the conversion device 20 by the mirrors 13 located on both sides of the front end of the light combining device 30 .

Please refer to FIG. 4 , which is a schematic diagram of a light path of a solid-state light source device 400 according to a fourth embodiment of the present invention. It differs from the solid-state light source device 300 in the third embodiment in that the light combining device 30 is two elliptical mirrors disposed opposite to each other. It can project the blue light from its first focal point and the yellow light generated by the excitation of the fluorescent layer by the laser beam b into the light guide component 40 more completely.

Please refer to FIG. 5 , which is a schematic diagram of a light path of a solid-state light source device 500 according to a fifth embodiment of the present invention. The difference from the solid-state light source device 100 in the first embodiment is that the light combining device 30 in the first embodiment is an elliptical mirror separated along the short axis direction. The light combining device 50 in the fifth embodiment is an elliptical reflecting mirror separated along the long axis direction, the light source group 10 is disposed on one side of the light combining device 50 and the laser light source 11 of the light source group 10 The emitted laser beam b is condensed by the lens group 12 and then directly passes through the light combining device 50 and is directed to the converting device 20 at the first focus of the light combining device 50 . The white mixed light W scattered on the side of the light-receiving surface illuminating area 21 is reflected by the light combining device 50 and guided to the light guide component 40 located at the second focal point.

In the solid-state light source device of the present invention, the high-brightness laser beam b of the laser light source 11 is used to project the conversion device 20 to excite the required white mixed light W, and the white mixed light W includes blue light and laser light. The yellow light generated, wherein the blue light is obtained by reflecting the high-intensity laser generated by the laser light source 11 on the conversion device 20, and the yellow light is generated by the laser light source 11 illuminating the light-receiving surface of the conversion device 20, and the white mixed After the light W is scattered and mixed at the first focus of the light combining device 30, the light W is focused by the light combining device 30 at the second focus, that is, the light guide component 40. The mixed light beam has high brightness and bright colors, and can be effectively The luminous brightness of the projector is improved and the structure is simplified.

In addition, the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the preferred embodiments of the present invention have been disclosed as above, they are not intended to limit the present invention. Those skilled in the art, within the scope of the technical solution of the present invention, can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention 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: Lens group

13: Reflector

20: Conversion device

21: Light Zone

30: Combined light device

40: Light guide components

b: laser beam

W: white mixed light

Claims (9)

A solid-state light source device, characterized in that it comprises at least one light source group, a conversion device, at least one light combining device and a light guide assembly, wherein the light source group is used to project monochromatic light with high intensity to the conversion device, The converting device converts the monochromatic light into white mixed light, the light combining device is an elliptical reflecting mirror, the converting device is arranged on the first focus of the light combining device, and the light guide assembly It is arranged on the second focus of the light combining device, and the white mixed light converted by the conversion device is transmitted from the first focus of the light combining device, and then projected into the light after being mixed and condensed by the light combining device. In the light guide assembly at the second focal point; wherein: there are two light combining devices, and the two elliptical mirrors are arranged opposite to each other, and the white mixed light transmitted from the first focal point can be completely projected into the light guide assembly. The solid-state light source device according to claim 1, wherein: a light-receiving surface of the conversion device has an illumination area, and the illumination area is illuminated by the monochromatic light generated by the light source group. The solid-state light source device according to claim 2, wherein: the illumination area has a fluorescent layer, and the fluorescent layer is excited to generate the white mixed light when irradiated by the monochromatic light of the light source group. The solid-state light source device according to claim 2, wherein: the illumination area is a fluorescent glass sheet produced by fusing phosphor powder and glass together, or fluorescent light produced by adding fluorescent substances during crystal growth Crystals are cut to shape. The solid-state light source device according to claim 1, wherein: the monochromatic light projected by the light source group is blue light, and the white mixed light is the monochromatic light projected by the light source group by the conversion device Illumination excitation produces a mixture of yellow light and reflected blue light. The solid-state light source device according to claim 1, wherein: the light source group includes a laser light source and a reflector, the laser light source generates a monochromatic laser beam with high intensity, and the reflector is used to convert the The monochromatic laser beam is reflected and directed towards the conversion device. The solid-state light source device of claim 6, wherein: the laser light source includes at least one laser generator for generating a high-intensity monochromatic laser beam. The solid-state light source device according to claim 6, wherein: the light source group further comprises a lens group, the lens group is located at the front end of the laser light source, and the lens group is used for collecting the light emitted by the laser light source. Monochromatic laser beam. The solid-state light source device according to claim 6, wherein: the light source groups are two groups and the two light source groups are respectively disposed on both sides of the light combining device, and the laser light sources of the two light source groups The emitted monochromatic laser beams are respectively reflected and guided into the conversion device by the corresponding mirrors located on both sides of the front end of the light combining device.

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