CN214011712U

CN214011712U - Laser projection module

Info

Publication number: CN214011712U
Application number: CN202022435654.0U
Authority: CN
Inventors: 李谦
Original assignee: Shanghai Lianggu Intelligent Technology Co ltd
Current assignee: Shanghai Lianggu Intelligent Technology Co ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-08-20
Anticipated expiration: 2030-10-28

Abstract

The application discloses laser projection module, it includes: the device comprises a first light source module, a second light source module, a third light source module, a reflector group and a light beam receiving surface; the first light source module, the second light source module and the third light source module are respectively provided with a laser diode; the first light source module, the second light source module, the third light source module and the light beam receiving surface are arranged in a surrounding manner on four sides of the reflector set; the reflector group comprises a plurality of first refractors and a plurality of second refractors which are arranged at intervals, and a gap is formed between every two adjacent first refractors; the first refractor reflects the light beam output by the first light source module to a light beam receiving surface; the second refractor reflects the light beam output by the third light source module to the light beam receiving surface; the light beam output by the second light source module passes through the gap and directly irradiates on the light beam receiving surface. The light beam emitting device can overcome the problem of intensive heating while realizing high-density light beam emitting.

Description

Laser projection module

Technical Field

This application belongs to laser technical field, relates to a laser projection module particularly.

Background

With the progress of the technology, laser projection televisions using laser as a display light source are becoming the mainstream display technology of the next generation. Most of the existing laser projection light sources adopt a Riya laser light source module. A plurality of laser diodes which are arranged in a rectangular array are distributed on the plane of one side of the light source module, and the light beam emitting directions of the laser diodes are parallel to each other. The problems existing in the technical scheme are as follows: laser diodes are very powerful and generate a lot of heat when in operation. If the distance between adjacent laser diodes is too small, the problem of intensive heat generation may occur. In addition, the laser diode itself also has a certain volume, and even if the heat dissipation problem is solved, the light source arrangement with a certain density still cannot be realized. In summary, the conventional light source module structure cannot achieve the miniaturization of the light source. Therefore, how to develop a new laser projection module to overcome the above problems is a research direction for those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high density laser module, can overcome the intensive problem of generating heat when realizing the beam outgoing of high density.

The technical scheme is as follows:

a laser projection module, comprising: the device comprises a first light source module, a second light source module, a third light source module, a reflector group and a light beam receiving surface; the first light source module, the second light source module and the third light source module are respectively provided with a laser diode; the first light source module, the second light source module, the third light source module and the light beam receiving surface are arranged in a surrounding manner on four sides of the reflector set; the reflector group comprises a plurality of first refractors and a plurality of second refractors; the first refractors and the second refractors are arranged at intervals, and gaps are arranged between every two adjacent first refractors and every two adjacent second refractors; the first light source module and the third light source module are oppositely arranged; the mirror surface of the first refractor is plated with a high-reflection film matched with the laser wavelength of a laser diode arranged on the first light source module; the mirror surface of the second refraction mirror is plated with a high reflection film matched with the laser wavelength of a laser diode arranged on the third light source module; the first refractive mirror is used for reflecting the light beam output by the laser diode arranged on the first light source module to a light beam receiving surface; the second refraction mirror is used for reflecting the light beam output by the laser diode arranged on the third light source module to a light beam receiving surface; and the light beam output by the laser diode on the second light source module passes through the gap between the first refractor and the second refractor and directly irradiates on a light beam receiving surface.

By adopting the technical scheme: the first light source module, the second light source module and the third light source module jointly form a light source with three sides arranged, and light beams output by the laser diodes arranged on the first light source module and the third light source module form reflected light through the first refraction mirror and the second refraction mirror and are output to the light beam receiving surface. Meanwhile, the light beam output by the second light source module is directly emitted to the light beam receiving surface. Thereby, a high density of laser beams is generated at the beam-receiving surface while ensuring that the laser diodes of the three light source module surfaces have a sufficiently large gap; meanwhile, the design of the light source module and the reflector group which are arranged on three sides ensures that the whole light source module is compact and small in size, and the design difficulty of the whole structure is reduced.

Preferably, in the laser projection module set described above: the laser diodes on the first light source module, the second light source module and the third light source module are all arranged in a strip array.

Preferably, in the laser projection module set described above: the mirror surface of the first refractor forms an included angle of 135 degrees with a light beam output by a laser diode arranged on the first light source module; the mirror surface of the second refracting mirror and the light beam output by the laser diode arranged on the third light source module form an included angle of 135 degrees, and the mirror surface of the first refracting mirror is vertical to the mirror surface of the second refracting mirror.

Preferably, in the laser projection module set described above: the light beam receiving surface is a focusing lens or a plane mirror.

Preferably, in the laser projection module set described above: the first light source module, the second light source module and the third light source module are respectively driven by continuous direct current signals or square wave pulse signals.

Preferably, in the laser projection module set described above: the first light source module, the second light source module and the third light source module are driven by the same power supply module.

Compared with the prior art, the device is simple in structure and easy to realize. The problem of intensive heating can be overcome while the high-density light beam is emitted.

Drawings

The present application will now be described in further detail with reference to the following detailed description and accompanying drawings:

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic perspective view of the mirror group shown in fig. 1.

1. a first light source module; 2. a second light source module; 3. a third light source module; 4. a reflector group; 5. a light beam receiving surface; 41. a first refractive mirror; 42. a second refractor;

Detailed Description

In order to more clearly illustrate the technical solutions of the present application, the following will be further described with reference to various embodiments.

A laser projection module, comprising: the light source module comprises a first light source module 1, a second light source module 2, a third light source module 3, a reflector group 4 and a light beam receiving surface 5; the first light source module 1, the second light source module 2 and the third light source module 3 are respectively provided with a laser diode; the first light source module 1, the second light source module 2, the third light source module 3 and the light beam receiving surface 5 are arranged in a surrounding manner on four sides of the reflector group 4.

The reflector group 4 comprises a plurality of first refractors 41 and a plurality of second refractors 42; the first refractors 41 and the second refractors 42 are arranged at intervals, and a gap is arranged between each adjacent first refractor 41 and each adjacent second refractor 42; the first light source module 1 and the third light source module 3 are oppositely arranged; the mirror surface of the first refractor 41 is plated with a high reflection film matched with the laser wavelength of the laser diode arranged on the first light source module 1; the mirror surface of the second refractor 42 is plated with a high reflection film matched with the laser wavelength of the laser diode arranged on the third light source module 3. The material of the high-reflection film is generally metal such as aluminum, gold, etc., and may be a composite oxide thin film material. In order to improve the laser reflectivity, reduce the absorption rate and increase the laser damage threshold, the material of the reflective film has a correlation with the film thickness and the emission wavelength of the laser diode, and the conditions for obtaining the optimal reflectivity and forming the standing wave are practically taken as the standard.

The laser diodes on the first light source module 1, the second light source module 2 and the third light source module 3 are all arranged in a strip array. The mirror surface of the first refractor 41 forms an included angle of 135 degrees with the light beam output by the laser diode arranged on the first light source module 1; the mirror surface of the second refraction mirror 42 forms an included angle of 135 degrees with the light beam output by the laser diode arranged on the third light source module 3. And the mirror surface of the first refractive mirror 41 and the mirror surface of the second refractive mirror 42 are perpendicular to each other.

In this example: the beam receiving surface 5 is a focusing lens. The first light source module 1, the second light source module 2 and the third light source module 3 are respectively driven by square wave pulse signals. The first light source module 1, the second light source module 2 and the third light source module 3 are driven by the same power supply module.

In practice, the working process is as follows:

a light beam output by a laser diode arranged on the first light source module 1 reaches a mirror surface of the first refractor 41, and is reflected by the first refractor 41 to form a first reflected light, and the first reflected light is output to the light beam receiving surface 5;

the light beam output by the laser diode arranged on the third light source module 3 reaches the mirror surface of the second refractor 42, and is reflected by the second refractor 42 to form second reflected light which is output to the light beam receiving surface 5;

the light beam output by the laser diode arranged on the second light source module 2 passes through the gap between the first refractor 41 and the second refractor 42 and directly irradiates the light beam receiving surface 5.

The first reflected light, the second reflected light and the direct light are parallel to each other, and the positions of light spots formed on the light beam receiving surface 500 are filled with each other, so that laser beams emitted by light source modules placed on three sides in the light source module are uniformly concentrated on the light beam receiving surface 5, and the finally obtained output laser energy density is higher.

The above description is only for the specific embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application are intended to be covered by the scope of the present application. The protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A laser projection module, comprising: the light source device comprises a first light source module (1), a second light source module (2), a third light source module (3), a reflector group (4) and a light beam receiving surface (5);

the first light source module (1), the second light source module (2) and the third light source module (3) are respectively provided with a laser diode; the first light source module (1), the second light source module (2), the third light source module (3) and the light beam receiving surface (5) are arranged in a surrounding manner on four sides of the reflector group (4);

the reflector group (4) comprises a plurality of first refractors (41) and a plurality of second refractors (42); the first refractors (41) and the second refractors (42) are arranged at intervals, and gaps are arranged between every two adjacent first refractors (41) and every adjacent second refractors (42);

the first light source module (1) and the third light source module (3) are oppositely arranged; the mirror surface of the first refractor (41) is plated with a high-reflection film matched with the laser wavelength of a laser diode arranged on the first light source module (1); the mirror surface of the second refraction mirror (42) is plated with a high reflection film matched with the laser wavelength of a laser diode arranged on the third light source module (3);

the first refractive mirror (41) is used for reflecting light beams output by the laser diode arranged on the first light source module (1) to the light beam receiving surface (5); the second refraction mirror (42) is used for reflecting the light beam output by the laser diode arranged on the third light source module (3) to the light beam receiving surface (5); the light beam output by the laser diode arranged on the second light source module (2) passes through a gap between the first refracting mirror (41) and the second refracting mirror (42) and directly irradiates on a light beam receiving surface (5).

2. The laser projection module of claim 1, wherein: the laser diodes on the first light source module (1), the second light source module (2) and the third light source module (3) are all arranged in a strip array.

3. The laser projection module of claim 2, wherein: the mirror surface of the first refractor (41) forms an included angle of 135 degrees with a light beam output by a laser diode arranged on the first light source module (1); the mirror surface of the second refractor (42) and the light beam output by the laser diode arranged on the third light source module (3) form an included angle of 135 degrees, and the mirror surface of the first refractor (41) is perpendicular to the mirror surface of the second refractor (42).

4. The laser projection module of any of claims 1-3, wherein: the light beam receiving surface (5) is a focusing lens or a plane mirror.

5. The laser projection module of any of claims 1-3, wherein: the first light source module (1), the second light source module (2) and the third light source module (3) are respectively driven by continuous direct current signals or square wave pulse signals.

6. The laser projection module of claim 1, wherein: the first light source module (1), the second light source module (2) and the third light source module (3) are driven by the same power supply module.