CN110879504B - Solid-state light source device - Google Patents

Abstract

The present invention proposes 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 high-intensity monochromatic light to the conversion device, The conversion device converts the monochromatic light into white mixed light, the light combination device is an elliptical reflector, the conversion device is arranged on the first focal point of the light combination device, and the light guide assembly Set on the second focal point of the light combining device, the white mixed light converted by the conversion device comes from the first focal point of the light combining device, is mixed and concentrated by the light combining device and then projected into the In the light guide assembly at the second focal point. The structure of the solid-state light source device of the present invention is simple and can effectively improve the lumen brightness of the projector.

Description

solid state light source device

technical field

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

Background technique

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 existing laser projector light source device, the light beam of the first color is projected to a fluorescent color wheel after being reflected by a two-way dichroic mirror, and then a light beam of the second color will be generated 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 Then after being reflected by at least three reflectors, it is incident on the other side of the dichroic mirror, and after being reflected by the dichroic mirror, it is combined with the light of the second color and the third color. Synthetic light. 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.

Contents of the invention

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, comprising at least one light source group, a conversion device, at least one light combination device and a light guide assembly, the light source group is used to project high-intensity monochromatic light to the conversion device, the conversion The device converts the monochromatic light into white mixed light, the light combination device is an elliptical reflector, the conversion device is arranged on the first focal point of the light combination device, and the light guide assembly is arranged on the On the second focus of the light combination device, the white mixed light converted by the conversion device comes from the first focus of the light combination device, and is projected into the second focus after being mixed and concentrated by the light combination device in the light guide assembly.

Compared with the prior art, the solid-state light source device of the present invention uses the high-brightness laser beam of the laser light source to project the conversion device to excite the required white mixed light, and then cooperates with the light combination device, The white mixed light is collected and projected into the light guide assembly through the light combining device, the mixed light beam has high brightness and bright colors, which can effectively improve the lumen brightness of the projector and has a simplified structure.

Description of drawings

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

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

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

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

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

Explanation of main component symbols

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intervening element at the same time. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present.

Unless otherwise defined, 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. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 1 , which is a schematic diagram of a light path of a solid-state light source device 100 provided in 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 combination device 30 and a light guide assembly 40 . The light source group 10 mainly produces monochromatic light with high intensity, then converts the monochromatic light into white mixed light through the conversion device 20, and then combines 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 the combined light beam and eliminating light spots 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 then guided by a lens (not shown) and projected into a reverse total internal reflection prism group (RTIR, Reverse Total Internal Reflection) for total internal reflection and projected to a On the external digital micromirror 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 prism group, so that the digital micromirror display device constitutes 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 high-intensity monochromatic laser beam b. The laser beam b is blue light. In this embodiment, the laser light source 11 is a group of several laser generators 110, and the group of laser generators 110 is composed of four to generate a laser beam b with relatively 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 to gather the laser beam b emitted by the laser light source 11 . The laser light source 11 is located on one side of the light combination device 30, and the 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 located at the light combination device. The reflection mirror 13 at the front end of 30 is guided to the conversion device 20 .

The conversion device 20 is located in the light combination device 30 , and the 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 this embodiment, the irradiated area 21 has a fluorescent layer. Preferably, the irradiated area 21 is a fluorescent glass sheet produced by melting phosphor powder and glass together, or a fluorescent glass sheet produced by adding fluorescent substances during the crystal growth process. The crystals are then cut to shape. When the fluorescent layer is irradiated by the blue laser beam b of the laser light source 11 , it will be excited to generate a yellow light, which will be reflected to obtain a blue light, so as to obtain the white mixed light W.

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

The light combination device 30 is an elliptical reflector, the light receiving surface of the conversion device 20 is set on the first focal point of the light combination device 30 , and the light guide assembly 40 is set on the light combination device 30 On the second focus. The light-combining device 30 receives the blue light transmitted from its first focus and the yellow light generated by the fluorescent layer excited by the laser beam b, and generates the white mixed light W after mixing and concentrating the light, which is projected into the 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 provided in the second embodiment of the present invention. It differs from the solid-state light source device 100 in the first embodiment in that: the light combination device 30 is two oppositely arranged elliptical reflectors. It can more completely project the blue light transmitted from its first focal point and the yellow light generated by the fluorescent layer excited by the laser beam b into the light guide component 40 .

Please refer to FIG. 3 , which is a schematic diagram of a light path of a solid-state light source device 300 provided in 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 groups 10 are divided into two groups, and the two groups of light source groups 10 are respectively arranged on both 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 collected by the corresponding lens groups 12 respectively, and are respectively reflected by the reflectors 13 located on both sides of the front end of the light combining device 30 and guided to the In the conversion device 20.

Please refer to FIG. 4 , which is a schematic diagram of a light path of a solid-state light source device 400 provided in 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 oppositely arranged elliptical reflectors. It can more completely project the blue light transmitted from its first focal point and the yellow light generated by the fluorescent layer excited by the laser beam b into the light guide component 40 .

Please refer to FIG. 5 , which is a schematic diagram of a light path of a solid-state light source device 500 provided in 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 combination device 30 in the first embodiment is an elliptical reflector separated along the minor axis direction. The light combining device 50 in the fifth embodiment is an elliptical mirror separated along the long axis direction, the light source group 10 is arranged 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 combination device 50 and is directed to the conversion device 20 at the first focal point of the light combination device 50 , and then from the conversion device 20 The white mixed light W scattered on one side of the light-receiving surface illuminated area 21 is reflected by the light-combining device 50 and guided to the light-guiding assembly 40 at the second focal point.

The solid-state light source device of the present invention projects the conversion device 20 through the high-brightness laser beam b of the laser light source 11, so as to excite the required white mixed light W, and the white mixed light W includes blue light and laser light. The yellow light produced, 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 produced by the light receiving surface of the conversion device 20 irradiated by the laser light source 11, and the white color is mixed The light W is scattered and mixed by the light combination device 30 at the first focal point of the light combination device 30 and focused on the second focal point, that is, the light guide assembly 40. The mixed light beam has high brightness and bright colors, which can effectively The lumen brightness of the projector is improved and the structure is simplified.

In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made according to the spirit of the present invention should be included in the scope of protection claimed by the present invention.

Claims (9)

1. A solid-state light source device, characterized in that: comprising at least one light source group, a conversion device, at least one light combination device and a light guide assembly, the light source group is used to project a single light with high intensity to the conversion device Colored light, the conversion device converts the monochromatic light into white mixed light, the light combination device is two oppositely arranged elliptical reflectors, and the conversion device is arranged at the first focal point of the light combination device Above, the light guide assembly is arranged on the second focal point of the light combining device, and the white mixed light converted by the conversion device comes from the first focal point of the light combining device, and passes through the light combining device. The device mixes and condenses the light and projects it into the light guide assembly at the second focal point; Wherein, the conversion device is located in the light combination device; the light combination device can completely project the white mixed light transmitted from its first focal point into the light guide assembly. 2 . The solid-state light source device according to claim 1 , wherein the light-receiving surface of the conversion device has an illumination area, and the illumination area is irradiated by the monochromatic light generated by the light source group. 3. 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. 4. The solid-state light source device as claimed in claim 2, characterized in that: the illumination area is a fluorescent glass sheet produced by melting fluorescent powder and glass together, or a fluorescent crystal produced by adding fluorescent substances during the crystal growth process. Cut to shape. 5. 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 light projected by the conversion device by the light source group The mixed light of the yellow light and the reflected blue light generated by the excitation of the monochromatic light. 6. The solid-state light source device as claimed in claim 1, wherein the light source group comprises a laser light source and a reflector, the laser light source produces a high-intensity monochromatic laser beam, and the reflector uses to reflect the monochromatic laser beam to the conversion device. 7. The solid-state light source device as claimed in claim 6, wherein said laser light source comprises at least one laser generator for generating said monochromatic laser beam with high intensity. 8. 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 to gather the laser light source The monochromatic laser beam emitted. 9. The solid-state light source device according to claim 6, characterized in that: the light source groups are divided into two groups, and the two groups of light source groups are respectively arranged on both sides of the light combining device, and the two groups of light source groups The monochromatic laser beams emitted by the laser light source are respectively reflected by the corresponding mirrors located on both sides of the front end of the light combination device and directed to the conversion device.

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