CN110879504B

CN110879504B - Solid-state light source device

Info

Publication number: CN110879504B
Application number: CN201811038845.4A
Authority: CN
Inventors: 黄世凯
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2018-09-06
Filing date: 2018-09-06
Publication date: 2023-01-13
Anticipated expiration: 2038-09-06
Also published as: CN110879504A

Abstract

The invention provides a solid-state light source device, which 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 for projecting monochromatic light with high intensity to the conversion device, the conversion device converts the monochromatic light into white mixed light, the light combining device is an elliptical reflector, the conversion device is arranged on a first focus of the light combining device, the light guide assembly is arranged on a 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, mixed and condensed by the light combining device and then projected into the light guide assembly at the second focus. The solid-state light source device is simple in structure, and can effectively improve the lumen brightness of the projector.

Description

Solid-state light source device

Technical Field

The present invention relates to a light source device of a projector, and more particularly, to a solid-state light source device with a simplified structure.

Background

Laser projectors are a new type of projection device, and have received much attention because they project images with a larger color gamut, higher brightness, contrast, and color saturation.

A first color light beam emitted by a light source of an existing laser projector light source device is reflected by a dichroic mirror and then projected to a fluorescent color wheel to generate a second color light beam and a third color light beam, and the second color light beam and the third color light beam 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, is reflected by at least three reflectors and then enters the other side of the two-way dichroic mirror, and is reflected by the two-way dichroic mirror and then is combined with the light of the second color and the light of the third color. Finally, the mixed light beam is subjected to the operations of light uniformization and light spot elimination through a light guide pipe and the like, and the structure of the light source device is complex.

Disclosure of Invention

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

A solid-state light source device 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 for projecting high-intensity monochromatic light to the conversion device, the conversion device converts the monochromatic light into white mixed light, the light combining device is an elliptical reflector, the conversion device is arranged on a first focus of the light combining device, the light guide assembly is arranged on a 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 projected into the light guide assembly at the second focus after being mixed and condensed by the light combining device.

Compared with the prior art, the solid-state light source device provided by the invention projects the conversion device through the high-brightness laser beam of the laser light source to excite the required white mixed light, and the white mixed light is converged and projected into the light guide assembly through the light combining device by matching with the light combining device, so that the mixed light beam is high in brightness and bright in color, the lumen brightness of the projector can be effectively improved, and the structure is simplified.

Drawings

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

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

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

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

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

Description of the main elements

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 is a schematic diagram of an optical path of a solid-state light source device 100 according to a 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 guiding assembly 40. The light source group 10 mainly generates high-intensity monochromatic light, converts the monochromatic light into white mixed light through the conversion device 20, and then assembles the mixed light into a combined light beam through the light combining device 30 and projects the combined light beam to the light guide assembly 40 to perform operations of light homogenization and spot elimination of the combined light beam through 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 guided by a lens (not shown) to be projected into an inverted Total Internal Reflection (RTIR) prism set to be projected onto an external Digital Micro-mirror display Device (DMD) by Total Internal Reflection. The digital micromirror display device receives the combined light beam to form an image light beam, and then the image light beam is refracted back to a projection lens group through the prism group, so that an image formed by the digital micromirror display device can be projected.

The light source assembly 10 includes a laser light source 11, a lens assembly 12 and a reflector 13. Wherein the laser light source 11 comprises at least one laser generator 110 for generating a monochromatic laser beam b having a high intensity. The laser beam b is blue light. In the present embodiment, the laser light source 11 includes a plurality of laser generators 110 as a group, and the laser generator 110 includes four laser generators, and generates the laser beam b having 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 at one side of the light combining device 30, and a light path of the laser light source 11 passes through the lens group 12 located at the front end of the laser light source 11 and is reflected by the reflector 13 located at the front end of the light combining device 30 to be guided to the conversion device 20.

The conversion device 20 is located in the light combining device 30, and a light receiving surface of the conversion 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 the present embodiment, the illumination area 21 has a fluorescent layer, and preferably, the illumination area 21 is a fluorescent glass sheet produced by fusing fluorescent powder and glass together, or a fluorescent crystal produced by introducing a fluorescent material during the crystal growth process and then cutting and shaping. The fluorescent layer is excited by the blue laser beam b of the laser light source 11 to generate a yellow light, and is reflected to obtain a blue light, so as to obtain the white mixed light W.

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

The light combining device 30 is an elliptical reflector, the light receiving surface of the converting device 20 is disposed at the first focus of the light combining device 30, and the light guiding assembly 40 is disposed at the second focus of the light combining device 30. The light combining device 30 receives the blue light transmitted from the first focus and the yellow light generated by the fluorescent layer excited by the laser beam b, and after mixing and condensing, the white mixed light W is generated and projected into the light guide assembly 40 at the second focus.

Fig. 2 is a schematic light path diagram 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 reflectors arranged oppositely. It can more completely project the blue light transmitted from the first focal point and the yellow light generated by the fluorescent layer excited by the laser beam b into the light guide assembly 40.

Fig. 3 is a schematic light path diagram of a solid-state light source device 300 according to a third embodiment of the present invention. It differs from the solid-state light source device 100 in the first embodiment in that: the light source sets 10 are two sets, and the two sets of light source sets 10 are respectively disposed on two sides of the light combining device 30. The laser beams b emitted by the laser light sources 11 of the two groups of light source groups 10 are respectively collected by the corresponding lens groups 12, and are respectively reflected by the reflectors 13 located at the two sides of the front end of the light combining device 30 and guided into the conversion device 20.

Fig. 4 is a schematic light path diagram 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 reflectors arranged oppositely. It can more completely project the blue light transmitted from the first focal point and the yellow light generated by the fluorescent layer excited by the laser beam b into the light guide assembly 40.

Fig. 5 is a schematic light path diagram of a solid-state light source device 500 according to a fifth embodiment of the present invention. It differs from the solid-state light source device 100 in the first embodiment in that: the light combining means 30 in the first embodiment is an elliptical reflector divided in the minor axis direction. The light combining device 50 in the fifth embodiment is an elliptical reflector separated along the major axis direction, the light source group 10 is disposed at one side of the light combining device 50, and the laser beam b emitted by the laser light source 11 of the light source group 10 is collected by the lens group 12 and then directly guided to the converting device 20 located at the first focal point of the light combining device 50 through the light combining device 50, and then the white mixed light W scattered from the light receiving surface illumination area 21 side of the converting device 20 is reflected by the light combining device 50 and guided to the light guiding assembly 40 located at the second focal point.

In the solid-state light source device of the present invention, the conversion device 20 is projected by the high-luminance laser beam b of the laser light source 11, so as to excite the required white mixed light W, which includes the blue light and the yellow light generated by the laser light, wherein the blue light is obtained by reflecting the high-intensity laser light generated by the laser light source 11 on the conversion device 20, the yellow light is generated by irradiating the light receiving surface of the conversion device 20 with the laser light source 11, and the white mixed light W is scattered and mixed at the first focal point of the light combining device 30, and then is focused at the second focal point by the light combining device 30, i.e. the light guide assembly 40, so that the mixed light beam has high luminance and bright color, and the lumen luminance of the projector can be effectively improved, and the structure is simplified.

In addition, other modifications within the spirit of the invention may occur to those skilled in the art, and such modifications are, of course, included within the scope of the invention as claimed.

Claims

1. A solid state light source device, characterized by: the light source group is used for projecting high-intensity monochromatic light to the conversion device, the conversion device converts the monochromatic light into white mixed light, the light combining device is two elliptical reflectors which are oppositely arranged, the conversion device is arranged on a first focus of the light combining device, the light guiding assembly is arranged on a 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 is mixed and condensed by the light combining device and then is projected into the light guiding assembly at the second focus;

the conversion device is positioned in the light combining device; the light combining device can completely project the white mixed light transmitted from the first focus point of the light combining device into the light guide assembly.

2. The solid state light source device of claim 1, wherein: the light receiving surface of the conversion device is provided with an illumination area which is irradiated by the monochromatic light generated by the light source group.

3. The solid state light source device of claim 2, wherein: the illumination area is provided with a fluorescent layer, and the fluorescent layer can be excited by the irradiation of the monochromatic light of the light source group to generate the white mixed light.

4. The solid state light source device of claim 2, wherein: the illumination area is a fluorescent glass sheet generated by fusing fluorescent powder and glass together, or is formed by cutting a fluorescent crystal generated by adding fluorescent substances in the crystal growth process.

5. The solid state light source device of claim 1, wherein: the monochromatic light projected by the light source group is blue light, and the white mixed light is mixed light of yellow light and reflected blue light generated by the conversion device under the irradiation excitation of the monochromatic light projected by the light source group.

6. The solid state light source device of claim 1, wherein: the light source group comprises a laser light source and a reflector, the laser light source generates a monochromatic laser beam with high intensity, and the reflector is used for reflecting and guiding the monochromatic laser beam to the conversion device.

7. The solid state light device of claim 6, wherein: the laser light source comprises at least one laser generator for generating one of the monochromatic laser beams with a high intensity.

8. The solid state light device of claim 6, wherein: the light source group also comprises a lens group which is positioned at the front end of the laser light source and is used for gathering the monochromatic laser beams emitted by the laser light source.

9. The solid state light source device of claim 6, wherein: the light source groups are two groups, the two groups of light source groups are respectively arranged on two sides of the light combining device, and the monochromatic laser beams emitted by the laser light sources of the two groups of light source groups are respectively reflected by the corresponding reflectors positioned on two sides of the front end of the light combining device and guided into the conversion device.