CN111638621A - Light source module of digital light processing projector and projector - Google Patents

Abstract

The invention relates to the technical field of projection equipment, in particular to a light source module of a digital light processing projector, which comprises laser structures and a light adjusting component, wherein the laser structures are arranged in a three-dimensional staggered manner, emergent light of the laser structures is emitted to the light adjusting component, and the light adjusting component is arranged at the geometric center of the laser structures and used for enabling the optical axes of the emergent light of the laser structures to be parallel to each other. The projector comprises the optical machine module and the light source module of the digital light processing projector, wherein the optical machine module is arranged on a light path of the light source module of the digital light processing projector. The invention has the beneficial effects that: the total power output of the light source is improved, and the projection brightness of the projector is increased.

Description

Light source module of digital light processing projector and projector

Technical Field

The invention relates to the technical field of projection equipment, in particular to a light source module of a digital light processing projector and the projector.

Background

With the development of projection technology in recent years, projectors have been widely used in the fields of home, education, office, and the like, wherein laser projectors are more widely used because of the advantages of brightness, life span, and color gamut. With the development of Digital Light Processing (DLP) projection technology, the requirements on performance, mainly including brightness, contrast, color, dark image light leakage, etc., are increasing, especially in some large-scale application places, especially the requirements on brightness are higher.

In the prior art, as shown in fig. 3-5, the arrangement of the lasers is 2 × 4 laser particles, the equivalent spot area is 11 × 33, the optical power of a single laser particle is 4.5W, one group is 36W, and the application suitable for the DLP laser projector is usually 3 groups side by side, 3 directional barriers are stacked, 9 groups can be stacked, the equivalent spot size is 55 × 33, and the total optical power is 324W, and the efficiency of the application on the optical machine is about 85% due to the too large spot area; the requirement of some application places on brightness cannot be met, and particularly the high requirement of some large application places on brightness cannot be met.

Disclosure of Invention

The present invention is directed to a light source module of a digital light processing projector and a projector, so as to solve the problems mentioned in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a light source module of digital light processing projector, includes laser structure and light adjusting part, and is a plurality of the three-dimensional dislocation set of laser structure, the emergent light of laser structure all shoots at light adjusting part, light adjusting part sets up the geometric centre of laser structure is used for making the emergent light optical axis of laser structure is parallel to each other.

As a further scheme of the invention: the laser structure comprises light-emitting elements and a substrate, wherein the light-emitting elements are arranged on the substrate in an array manner.

As a still further scheme of the invention: the light emitting elements are arranged on the substrate in 4-5.

As a still further scheme of the invention: the light adjusting component comprises gratings and a polarizer, and the two gratings are vertically arranged and are respectively used for reflecting emergent light of the laser structure on the side surface of the gratings; the two mutually perpendicular polarizers are arranged at the bottom of the grating and are respectively used for reflecting emergent light of the laser structure on the side face of the grating, and reflected light reflected by the polarizers penetrates through the grating.

As a still further scheme of the invention: and a shading layer is arranged on any surface of the grating at intervals.

As a still further scheme of the invention: gaps are reserved between the adjacent light shielding layers, and the width of each gap is equal to that of each light shielding layer.

As a still further scheme of the invention: and part of the laser structures are arranged on two sides of the grating, and part of the laser structures are arranged on two sides or the bottom of the polarizer.

As a still further scheme of the invention: the number of the laser structures is 2 or more.

As a still further scheme of the invention: the number of laser structures is 5, is first laser instrument, second laser instrument, third laser instrument, fourth laser instrument and fifth laser instrument respectively, first laser instrument and fifth laser instrument dislocation set, second laser instrument, fourth laser instrument set up respectively first laser instrument and fifth laser's bottom, third laser instrument is 90 settings with second laser instrument, fourth laser instrument.

The invention provides another technical scheme that: the projector comprises an optical machine module and the light source module of the digital light processing projector, wherein the optical machine module is arranged on a light path of the light source module of the digital light processing projector.

Compared with the prior art, the invention has the beneficial effects that: the total power output of the light source is improved, and the projection brightness of the projector is increased.

Drawings

Fig. 1 is a schematic structural diagram of a light source module of a digital light processing projector according to an embodiment of the present invention.

Fig. 2 is a front view of a light source module of the digital light processing projector according to the embodiment of the invention.

Fig. 3 is a schematic structural diagram of a laser in the prior art.

Fig. 4 is a schematic diagram of the optical efficiency of a laser in the prior art.

Fig. 5 is an assembly diagram of a laser in the prior art.

Fig. 6 is a schematic structural diagram of a laser structure according to an embodiment of the present invention.

In the drawings: the laser comprises an A-light emitting element, a B-substrate, C-emergent light, a 1-first laser, a 2-second laser, a 3-third laser, a 4-fourth laser, a 5-fifth laser, a 6-grating and a 7-polarizer.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Referring to fig. 1 and 2, in an embodiment of the present invention, a light source module of a digital light processing projector includes a plurality of laser structures and a light adjusting assembly, the laser structures are arranged in a three-dimensional staggered manner, emergent light of the laser structures is emitted to the light adjusting assembly, and the light adjusting assembly is arranged at a geometric center of the laser structures and is used for enabling optical axes of the emergent light of the laser structures to be parallel to each other.

Specifically, two groups of two laser structures are respectively arranged on two sides of the light adjusting component in a staggered mode, one laser structure is arranged at the bottom of the light adjusting component, and emergent light of the laser structure arranged at the bottom of the light adjusting component directly penetrates through the light adjusting component; the light adjusting component does not change the emergent direction of emergent light which is emitted into the light adjusting component from the vertical direction; and the emergent direction of emergent light which is horizontally emitted into the light adjusting component is adjusted to be vertically emitted. Through the light adjusting component has realized making up a plurality of the emergent light of laser instrument structure has improved the total power output of light source, has increased and has used the luminance of the projector of the light source module of digital light processing projector.

Referring to fig. 6, in an embodiment of the present invention, the laser structure includes a light emitting device a and a substrate B, and a plurality of the light emitting devices a are arranged on the substrate B in an array.

Specifically, the light emitting elements a are arranged in 4 × 5 on the substrate B.

The light-emitting elements A are laser particles which are arranged on the substrate B in a 4 x 5 mode to form a laser structure, the light spot area is 14 x 18, the single-group optical power is 105W, and the maximum optical power is 125W. Five groups of laser structures are arranged around the light adjusting component, the maximum light power is 625W, the equivalent light spot area is 31.5 x 18, the light spot area is reduced, the efficiency of the light adjusting component applied to a light machine can reach more than 98 percent, and the brightness of a light source module of the digital light processing projector is improved.

Referring to fig. 1 and 2, in the embodiment of the present invention, the light adjusting assembly includes two gratings and a polarizer, where the two gratings are vertically disposed and respectively used for reflecting the emergent light of the laser structure on the side surfaces thereof; the two mutually perpendicular polarizers are arranged at the bottom of the grating and are respectively used for reflecting emergent light of the laser structure on the side face of the grating, and reflected light reflected by the polarizers penetrates through the grating.

Specifically, a shading layer is arranged on any surface of the grating at intervals. The shading layer is generated in a film coating mode. The emergent light of the laser structure on the side of the grating is reflected to be emitted in the vertical direction after passing through the grating, and the emergent light of the laser structure on the side of the polarizer is reflected to be emitted in the vertical direction after passing through the polarizer, enters the grating and then passes through the grating to be emitted in the vertical direction. And the light source is formed by converging the emergent light reflected by the grating.

Preferably, emergent light of the laser structure at the bottom of the polarizer directly penetrates through the polarizer and the grating and then is vertically emitted out, and the polarizer and the grating do not reflect or refract the emergent light.

Referring to fig. 1, in the embodiment of the invention, a gap is left between adjacent light shielding layers, and the gap is equal to the width of the light shielding layer.

Emergent light of the laser structure on the side of the polarizer is reflected to be emitted in the vertical direction after passing through the polarizer and penetrates through the gap on the grating. The gap provides a transmission channel for the reflected light of the polarizer and also provides a transmission channel for the emergent light of the laser structure at the bottom of the polarizer.

Referring to fig. 1 and 2, in the embodiment of the invention, part of the laser structures are disposed on two sides of the grating, and part of the laser structures are disposed on two sides or bottom of the polarizer.

Referring to fig. 1, in the embodiment of the invention, the number of the laser structures is 2 or more.

Specifically, when the quantity of laser structure is 5, be first laser 1, second laser 2, third laser 3, fourth laser 4 and fifth laser 5 respectively, first laser 1 and fifth laser 5 dislocation set, second laser 2, fourth laser 4 set up respectively first laser 1 and fifth laser 5's bottom, third laser 3 and second laser 2, fourth laser 4 are 90 settings. Emergent light of the first laser 1 and the fifth laser 5 is emitted after being reflected by the grating 6 respectively; emergent light of the second laser 2 and the fourth laser 4 passes through the polarizer 7 and then penetrates through the grating 6 to be emitted; the emergent light of the third laser 3 directly passes through the polarizer 7 and the grating 6 and then is emitted. The maximum optical power of the combined emergent light of the first laser 1, the second laser 2, the third laser 3, the fourth laser 4 and the fifth laser 5 is 625W, the equivalent light spot area is 31.5 x 18, and the brightness of the light source module of the digital light processing projector is improved.

When the number of the laser structures is 4, the laser structures are respectively a first laser 1, a second laser 2, a fourth laser 4 and a fifth laser 5, the first laser 1 and the fifth laser 5 are arranged in a staggered mode, and the second laser 2 and the fourth laser 4 are respectively arranged at the bottoms of the first laser 1 and the fifth laser 5. Emergent light of the first laser 1 and the fifth laser 5 is emitted after being reflected by the grating 6 respectively; emergent light of the second laser 2 and the fourth laser 4 passes through the polarizer 7 and then penetrates through the grating 6 to be emitted. Compared with the number of the laser structures of 5, the third laser 3 is eliminated, and the occupied space of the assembly is reduced.

In another embodiment of the present invention, a projector includes an optical mechanical module and the light source module of the digital light processing projector as described above, where the optical mechanical module is disposed on a light path of the light source module of the digital light processing projector.

Specifically, the optical machine module comprises a lens, and emergent light of the light source module of the digital light processing projector is diffused by the lens and then projected to the projection surface. Digital light processing projector's light source module, through the light adjusting part has realized making up a plurality of the emergent light of laser instrument structure has improved the total power output of light source, has improved the luminance of projector.

The working principle of the invention is as follows: two groups of two laser structures are respectively arranged on two sides of the light adjusting component in a staggered mode, one laser structure is arranged at the bottom of the light adjusting component, and emergent light of the laser structure arranged at the bottom of the light adjusting component directly penetrates through the light adjusting component; the light adjusting component does not change the emergent direction of emergent light which is emitted into the light adjusting component from the vertical direction; and the emergent direction of emergent light which is horizontally emitted into the light adjusting component is adjusted to be vertically emitted. Through the light adjusting component, a plurality of emergent lights of the laser structures are combined, and the total power output of the light source is improved.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. The utility model provides a light source module of digital light processing projector, its characterized in that includes laser structure and light adjusting part, and is a plurality of the three-dimensional dislocation set of laser structure, the emergent light of laser structure all shoots at light adjusting part, light adjusting part sets up the geometric center of laser structure is used for making the emergent light optical axis of laser structure is parallel to each other.

2. The light source module of claim 1, wherein the laser structure comprises light emitting elements and a substrate, and the light emitting elements are arranged on the substrate in an array.

3. The light source module of claim 2, wherein the light emitting elements are arranged 4 x 5 on the substrate.

4. The light source module of claim 1, wherein the light adjusting assembly comprises a grating and a polarizer, the two gratings are vertically disposed and respectively used for reflecting the outgoing light of the laser structure on the side surface thereof; the two mutually perpendicular polarizers are arranged at the bottom of the grating and are respectively used for reflecting emergent light of the laser structure on the side face of the grating, and reflected light reflected by the polarizers penetrates through the grating.

5. The light source module of claim 4, wherein a light shielding layer is disposed on any surface of the grating.

6. The light source module of claim 5, wherein a gap is left between adjacent light shielding layers, and the gap is equal to the width of the light shielding layers.

7. The light source module of claim 4, wherein a portion of the laser structures are disposed on two sides of the grating, and a portion of the laser structures are disposed on two sides or a bottom of the polarizer.

8. The light source module of claim 1, wherein the number of the laser structures is 2 or more.

9. The light source module of claim 8, wherein the number of the laser structures is 5, and the laser structures are respectively a first laser, a second laser, a third laser, a fourth laser and a fifth laser, the first laser and the fifth laser are arranged in a staggered manner, the second laser and the fourth laser are respectively arranged at the bottom of the first laser and the fifth laser, and the third laser is arranged at 90 ° to the second laser and the fourth laser.

10. A projector comprising an optical mechanical module and the light source module of the digital light processing projector according to any of claims 1-9, wherein the optical mechanical module is disposed on an optical path of the light source module of the digital light processing projector.

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