CN-118575120-B - Projection light source and projection equipment

CN118575120BCN 118575120 BCN118575120 BCN 118575120BCN-118575120-B

Abstract

A projection light source (10) and a projection device. The second light emitting region (Q2) and the third light emitting region (Q3) of the laser (101) in the projection light source (10) are positioned on the same side of the first light emitting region (Q1) in the first direction and are sequentially arranged along the second direction, a partial region of the second light emitting region (Q2) positioned at one end far away from the third light emitting region (Q3) is a second sub-region, a partial region of the first light emitting region (Q1) positioned at the one end is a first sub-region, the dimming mirror group (102) is used for adjusting laser emitted by the first sub-region and laser emitted by the second sub-region to emit the laser emitted by the third light emitting region (Q3) to the first light converging mirror (103) and the second light converging mirror (104) respectively at one side of the third light emitting region (Q3) far away from the second light emitting region, and the first light converging mirror (103) and the second light converging mirror (104) are both used for emitting the laser emitted in the first direction.

Inventors

LI WEI
GU XIAOQIANG
TIAN YOULIANG

Assignees

青岛海信激光显示股份有限公司

Dates

Publication Date: 20260508
Application Date: 20230327
Priority Date: 20220331

Claims (11)

1. The projection light source is characterized by comprising a laser, a dimming lens group, a first light converging lens and a second light converging lens, wherein the first light converging lens and the second light converging lens are positioned on one side, away from the laser, of the dimming lens group; the laser comprises a bottom plate and two light-emitting modules, wherein the two light-emitting modules are positioned on the bottom plate and are sequentially arranged along a first direction, the orthographic projection of each light-emitting module on the bottom plate is rectangular, the length direction of the rectangle is parallel to a second direction, and the width direction of the rectangle is parallel to the first direction; The laser also comprises a first light emitting area, a second light emitting area and a third light emitting area, wherein the first light emitting area, the second light emitting area and the third light emitting area are used for respectively emitting laser with different colors, the second light emitting area and the third light emitting area are positioned on the same side of the first light emitting area in the first direction and are sequentially arranged along the second direction, the first direction is perpendicular to the second direction, a part of the second light emitting area, which is positioned at one end far away from the third light emitting area, is a second subarea, and a part of the first light emitting area, which is positioned at one end, is a first subarea; The light adjusting lens group is used for adjusting the laser emitted by the first subarea and the laser emitted by the second subarea to the first light converging lens and the second light converging lens which are respectively shot from one side of the third light emergent area far away from the second light emergent area, the laser emitted by the area outside the first subarea in the first light emergent area is shot to the first light converging lens, the laser emitted by the area outside the second subarea in the second light emergent area and the laser emitted by the third light emergent area is shot to the second light converging lens, and the first light converging lens and the second light converging lens are both used for emitting the incident laser along the first direction.
2. The projection light source of claim 1, wherein the dimming optics group comprises a first dimming mirror and a second dimming mirror arranged in sequence along the second direction; the front projection of the first light adjusting mirror on the laser covers the first subarea and the second subarea, and the front projection of the second light adjusting mirror on the laser is positioned at one side of the third light emergent region away from the second light emergent region; The laser emitted from the first sub-zone and the second sub-zone is emitted to the first light-adjusting mirror, the first light-adjusting mirror is used for reflecting the emitted laser to the second light-adjusting mirror, the second light adjusting mirror is used for reflecting the incident laser light from the first subarea to the first light converging mirror and reflecting the incident laser light from the second subarea to the second light converging mirror.
3. The projection light source of claim 2, wherein the first dimming mirror comprises a first sub-mirror and a second sub-mirror, the second dimming mirror comprises a third sub-mirror and a fourth sub-mirror; An orthographic projection of the first sub-lens on the laser covers the first sub-region, and an orthographic projection of the second sub-lens on the laser covers the second sub-region; the first sub-lenses and the third sub-lenses are sequentially arranged along the second direction, and the second sub-lenses and the fourth sub-lenses are sequentially arranged along the second direction; the laser emitted from the first sub-zone is emitted to the first sub-lens, the first sub-lens is used for reflecting the emitted laser to the third sub-lens, the third sub-lens is used for reflecting the emitted laser to the first light converging lens, the laser emitted from the second sub-zone is emitted to the second sub-lens, the second sub-lens is used for reflecting the emitted laser to the fourth sub-lens, and the fourth sub-lens is used for reflecting the emitted laser to the second light converging lens.
4. The projection light source of claim 2, wherein the projection light source comprises a light source, The first dimming mirror includes: A first sub-lens, an orthographic projection of the first sub-lens on the laser covering the first sub-area, and A second sub-lens, an orthographic projection of the second sub-lens on the laser covering the second sub-zone; The second dimming mirror includes: A third sub-lens arranged along the second direction, wherein the laser light emitted from the first sub-region is directed to the first sub-lens, the first sub-lens is configured to reflect the incident laser light to the third sub-lens, the third sub-lens is configured to reflect the incident laser light to the first light converging lens, and The second sub-lens and the fourth sub-lens are arranged along the second direction, wherein the laser emitted from the second sub-region is emitted to the second sub-lens, the second sub-lens is configured to emit the emitted laser to the fourth sub-lens, and the fourth sub-lens is configured to reflect the emitted laser to the second light converging lens; Wherein the laser and the third sub-lens are positioned on the same side of the first sub-lens, and the first sub-lens and the first light converging lens are positioned on the same side of the third sub-lens; the laser and the fourth sub-lens are positioned on the same side of the second sub-lens, and the second sub-lens and the second light converging lens are positioned on the same side of the fourth sub-lens.
5. The projection light source of any of claims 1-4, wherein the second sub-region is a half of the second light extraction region.
6. The projection light source of any one of claims 1 to 4, wherein the divergence angle of the laser light emitted from the first light-emitting region is larger than the divergence angles of the laser light emitted from the second light-emitting region and the third light-emitting region; The projection light source further comprises a first fly-eye lens, the front projection of the first fly-eye lens on the laser covers the first light-emitting area, the second light-emitting area and the third light-emitting area, and the laser emitted by the laser is homogenized by the fly-eye lens and then emitted to the first light converging lens and the second light converging lens; The first fly-eye lens comprises a plurality of microlenses, and the length of the microlenses on the slow axis of the incident laser is larger than the length of the microlenses on the fast axis.
7. The projection light source of any one of claims 1 to 4, wherein the divergence angle of the laser light emitted from the first light-emitting region is larger than the divergence angles of the laser light emitted from the second light-emitting region and the third light-emitting region; The projection light source further comprises a first diffusion sheet and a second diffusion sheet, the diffusion degree of the first diffusion sheet to the laser is smaller than that of the second diffusion sheet to the laser, orthographic projection of the first diffusion sheet on the laser covers the first light emitting area, orthographic projection of the second diffusion sheet on the laser covers the second light emitting area and the third light emitting area, the laser emitted by the first light emitting area is diffused and homogenized by the first diffusion sheet and then emitted to the first light converging mirror, and the laser emitted by the second light emitting area and the third light emitting area is diffused and homogenized by the second diffusion sheet and then emitted to the second light converging mirror.
8. The projection light source of any one of claims 1 to 4, further comprising at least one diffuser positioned in a transmission path of the laser light emitted from the first and second combiner; the diffusion degree of the diffusion sheet on the incident laser on the fast axis is stronger than that on the slow axis.
9. The projection light source of claim 8, wherein the diffuser satisfies at least one of the following conditions: the diffusion sheet is a reflective diffusion sheet or a transmissive diffusion sheet; the diffusion sheet is wedge-shaped or plate-shaped; And, the diffusion sheet remains stationary, or the diffusion sheet is configured to translate within a target range, or the diffusion sheet is configured to rotate in a target direction, or the diffusion sheet is configured to flip within a target angular range.
10. The projection light source of claim 8, further comprising a second fly-eye lens, the at least one diffuser positioned between the first light combining lens and the second fly-eye lens; Or alternatively The projection light source further comprises a converging lens and a light guide pipe, wherein the at least one diffusion sheet, the converging lens and the light guide pipe are sequentially arranged, or the at least one diffusion sheet comprises a third diffusion sheet and a fourth diffusion sheet, and the third diffusion sheet, the converging lens, the fourth diffusion sheet and the light guide pipe are sequentially arranged.
11. A projection apparatus comprising the projection light source according to any one of claims 1 to 10, a light valve, and a lens; The projection light source is used for emitting laser to the light valve, the light valve is used for modulating the emitted laser and then emitting the modulated laser to the lens, and the lens is used for projecting the emitted laser to form a projection picture.

Description

Projection light source and projection equipment Cross Reference to Related Applications The application claims that the Chinese patent office and the application number are 202210337489.6 at the 3 rd month of 2022, the application name is a projection light source and a projection device, and the Chinese patent office and the application number are 202210337502.8 at the 3 rd month of 2022, the application name is a priority of the Chinese patent application of the projection light source and the projection device, and the whole contents of the application are incorporated by reference. Technical Field The present application relates to the field of photoelectric technologies, and in particular, to a projection light source and a projection device. Background With the development of photoelectric technology, projection devices are widely used. The projection light source in the projection device can emit laser light of various colors, and a projection screen can be formed based on the laser light. The higher the symmetry of the laser light of each color emitted by the projection light source, the better the mixing effect, the better the display effect of the projection picture. Disclosure of Invention The application provides a projection light source, which comprises a laser, a dimming lens group, a first light converging lens and a second light converging lens, wherein the first light converging lens and the second light converging lens are positioned at one side of the dimming lens group far away from the laser; The laser comprises a first light emitting area, a second light emitting area and a third light emitting area, wherein the first light emitting area, the second light emitting area and the third light emitting area are used for respectively emitting laser light with different colors, the second light emitting area and the third light emitting area are positioned on the same side of the first light emitting area in a first direction and are sequentially arranged along a second direction, and the first direction is perpendicular to the second direction; The light-adjusting lens group is used for adjusting the laser emitted by the first subarea and the laser emitted by the second subarea to the first light-converging lens and the second light-converging lens which are respectively emitted from one side of the third light-emitting area far away from the second light-emitting area, the laser emitted by the area outside the first subarea in the first light-emitting area is emitted to the first light-converging lens, the laser emitted by the area outside the second subarea in the second light-emitting area and the laser emitted by the third light-emitting area is emitted to the second light-converging lens, and the first light-converging lens and the second light-converging lens are both used for emitting the emitted laser along the first direction. In yet another aspect, a projection device is provided, the projection device including the projection light source, as described above, and a light valve and a lens; The projection light source is used for emitting laser to the light valve, the light valve is used for modulating the emitted laser and then emitting the laser to the lens, and the lens is used for projecting the emitted laser to form a projection picture. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Fig. 1 is a schematic structural view of a projection light source provided in the related art; FIG. 2 is a schematic view of a spot formed by laser light emitted from a light converging lens set according to the related art; FIG. 3A is a schematic diagram of a projection light source according to an embodiment of the present application; FIG. 3B is a schematic diagram of a projection light source according to an embodiment of the present application; FIG. 4A is a schematic view of another projection light source according to an embodiment of the present application; FIG. 4B is a schematic diagram of another projection light source according to an embodiment of the present application; FIG. 5A is a schematic view of a projection light source according to an embodiment of the present application; FIG. 5B is a schematic view of a projection light source according to an embodiment of the present application; FIG. 6A is a schematic view of a projection light source according to another embodiment of the present application; FIG. 6B is a schematic diagram of a projection light source according to another embodiment of the present application; FIG. 7A is a schematic diagram of a spot formed by a laser beam