CN-122029484-A - Laser light source device and projection system

Abstract

A laser light source device at least comprises a first laser (111), a second laser (112) and a light combining component (12). The first laser (111) and the second laser (112) each include a first light exit region (c 1) and a second light exit region (c 2). The first lasers (111) and the second lasers (112) are arranged along a first direction (x), a first light emitting region (c 1) of the first lasers (111) and a second light emitting region (c 2) of the second lasers (112) are arranged along the first direction (x), and a second light emitting region (c 2) of the first lasers (111) and a first light emitting region (c 1) of the second lasers (112) are arranged along the first direction (x). The light combining component (12) combines the laser light emitted from the first light emitting region (c 1) of the first laser (111) and the laser light emitted from the second light emitting region (c 2) of the second laser (112), combines the laser light emitted from the second light emitting region (c 2) of the first laser (111) and the laser light emitted from the first light emitting region (c 1) of the second laser (112), and emits the combined light along the first direction (x). The first direction (x) is parallel to the slow axis direction of the laser emitting laser light. Projection systems including the laser light source are also disclosed. The size of the laser light source device in the light emitting direction is reduced.

Inventors

• LI YAQIAN

Assignees

• 青岛海信激光显示股份有限公司

Dates

Publication Date

20260512

Application Date

20240919

Priority Date

20230928

Claims (19)

1. A laser light source device comprising: The light emitting assembly comprises a first laser and a second laser, each laser comprises a plurality of laser chips used for emitting three-color laser, the first laser and the second laser are arranged along a first direction, the plurality of laser chips in each laser are arranged into a first light emitting area and a second light emitting area which are arranged along a second direction, the wavelengths of the laser emitted by the first light emitting area and the second light emitting area are different, the first light emitting area of the first laser and the second light emitting area of the second laser are adjacently arranged along the first direction and are aligned along the center of the first direction, the second light emitting area of the first laser and the first light emitting area of the second laser are adjacently arranged along the first direction and are aligned along the center of the first direction, and the first direction and the second direction are mutually perpendicular; The light combination assembly is positioned at the light emitting side of the first laser and the second laser, and is used for combining the laser emitted by the first light emitting area of the first laser with the laser emitted by the second light emitting area of the second laser, combining the laser emitted by the second light emitting area of the first laser with the laser emitted by the first light emitting area of the second laser, emitting along the first direction, wherein the first direction is parallel to the direction of the slow axis of the laser, the divergence angle of the laser emitted by the laser chip along the slow axis is smaller than the divergence angle along the fast axis, and the divergence angle of the laser emitted by the light emitting assembly along the slow axis is larger than the divergence angle along the fast axis.
2. The laser light source device according to claim 1, wherein the first laser and the second laser are arranged side by side with the same light emission direction; The light combining component comprises a first component and a second component, wherein the first component is positioned at the light emergent side of a first light emergent region of the first laser and a second light emergent region of the second laser, and the second component is positioned at the light emergent side of the second light emergent region of the first laser and the first light emergent region of the second laser; The first component comprises a first reflecting piece, a first light combining piece and a second reflecting piece, wherein the first reflecting piece is used for receiving laser beams emitted by a second light emitting area of the second laser and reflecting the laser beams emitted by the second light emitting area of the second laser to the first light combining piece, the first light combining piece is used for combining the received laser beams emitted by the second light emitting area of the second laser with the laser beams emitted by the first light emitting area of the first laser and emitting the combined laser beams to the second reflecting piece, and the second reflecting piece is used for reflecting the received laser beams along the first direction; The second component comprises a third reflecting piece, a second light combining piece and a fourth reflecting piece, wherein the third reflecting piece is used for receiving laser beams emitted by a second light emitting area of the first laser and reflecting the laser beams emitted by the second light emitting area of the first laser to the second light combining piece, the second light combining piece is used for combining the received laser beams emitted by the second light emitting area of the first laser with the received laser beams emitted by the first light emitting area of the second laser and emitting the combined laser beams to the fourth reflecting piece, and the fourth reflecting piece is used for reflecting the received laser beams along the first direction.
3. The laser light source device according to claim 2, wherein the plurality of laser chips includes a plurality of first laser chips, a plurality of second laser chips, and a plurality of third laser chips, and wavelengths of laser light emitted from the first laser chips, the second laser chips, and the third laser chips are different; The first laser chips are positioned in the first light emitting area and are arranged into a first laser chip row along the first direction, and the second laser chips and the third laser chips are positioned in the second light emitting area and are arranged into a second laser chip row along the first direction; The first light reflecting piece and the third light reflecting piece are transparent flat plates, the transparent flat plates comprise a first surface and a second surface which are parallel to each other, the first surface faces the second laser chip row, and the second surface faces away from the second laser chip row; The first surface is provided with a first film layer which is used for transmitting the laser emitted by the third laser chip and reflecting the laser emitted by the second laser chip, the second surface is provided with a second film layer which is used for reflecting incident light, and the refractive index and the thickness of the transparent flat plate meet the conditions that the laser emitted by the third laser chip which is incident into the transparent flat plate from the first surface is emitted from a gap of the laser emitted by the second laser chip which is reflected by the first surface after being reflected by the second surface; The refractive index and thickness of the transparent flat plate satisfy: Wherein n represents the refractive index of the transparent flat plate, d represents the thickness of the transparent flat plate, and a represents the distance between two adjacent laser beams emitted by the laser.
4. The laser light source device according to claim 1, wherein the first laser and the second laser are arranged side by side with the same light emission direction; The light combining component comprises a light reflecting piece and a light combining piece, wherein the light reflecting piece is divided into an upper part and a lower part, and the light combining piece is divided into a first part and a second part; The lower part of the reflecting piece is used for receiving the laser light emitted by the second light emitting area of the second laser and reflecting the laser light emitted by the first light emitting area of the second laser to the first part of the light combining piece, the first part of the light combining piece is used for combining the received laser light emitted by the second light emitting area of the second laser and the laser light emitted by the first light emitting area of the first laser and emitting the combined laser light to the upper part of the reflecting piece, the second part of the light combining piece is used for combining the received laser light emitted by the first light emitting area of the second laser and the received laser light emitted by the second light emitting area of the first laser and emitting the combined laser light to the upper part of the reflecting piece, and the upper part of the reflecting piece is used for reflecting the received combined laser light beam along the first direction.
5. The laser light source device according to claim 1, wherein the first laser and the second laser are arranged side by side with the same light emission direction; The light combining component comprises a light reflecting piece and a light combining piece, wherein the light combining piece is divided into a first part and a second part; the first part of the light combining piece is used for combining the received laser emitted by the second light emitting area of the second laser with the laser emitted by the first light emitting area of the first laser, and the second part of the light combining piece is used for combining the received laser emitted by the first light emitting area of the second laser with the laser emitted by the first light emitting area of the first laser, and the received laser emitted by the first light emitting area of the second laser with the laser emitted by the second light emitting area of the first laser in the first direction.
6. The laser light source device according to claim 1, wherein the first laser and the second laser are arranged vertically, and light emitting directions are mutually perpendicular; The light combining component comprises a light reflecting piece and a light combining piece, wherein the light combining piece is divided into a first part and a second part; The first part of the light combining piece is used for receiving and combining the laser emitted by the first light emitting area of the first laser and the laser emitted by the second light emitting area of the second laser to emit towards the light reflecting piece, the second part of the light combining piece is used for receiving and combining the laser emitted by the second light emitting area of the first laser and the laser emitted by the first light emitting area of the second laser to emit towards the light reflecting piece, and the light reflecting piece is used for receiving the laser beam after combining the light and reflecting along the first direction.
7. The laser light source device according to claim 2,4, 5 or 6, wherein the plurality of laser chips are divided into a plurality of first laser chips, a plurality of second laser chips and a plurality of third laser chips, wherein wavelengths of laser light emitted from the first laser chips, the second laser chips and the third laser chips are different; The first laser chips are positioned in the first light emitting area and are arranged into a first laser chip row along the first direction, and the second laser chips and the third laser chips are positioned in the second light emitting area and are arranged into a second laser chip row along the first direction; The laser light source device also comprises a first prism and a second prism, wherein the first prism is positioned at the light-emitting side of the second light-emitting area of the second laser, and the second prism is positioned at the light-emitting side of the second light-emitting area of the first laser; The first prism and the second prism are used for transmitting the laser emitted by the second laser chip, transmitting part of the laser emitted by the third laser chip, and transferring the other part of the laser emitted by the third laser chip to the other side of the laser emitted by the second laser chip for emission.
8. The laser light source device according to claim 2,4, 5 or 6, wherein the plurality of laser chips are divided into a plurality of first laser chips, a plurality of second laser chips and a plurality of third laser chips, wherein wavelengths of laser light emitted from the first laser chips, the second laser chips and the third laser chips are different; The plurality of first laser chips are positioned in the first light emitting area and are arranged in two rows along the first direction, the plurality of second laser chips and the plurality of third laser chips are positioned in the second light emitting area, the plurality of second laser chips are arranged in one row along the first direction, the plurality of third laser chips are arranged in one row along the first direction, and the four laser chip rows are arranged along the second direction.
9. The laser light source device according to claim 7, wherein the first laser chip is a red laser chip, the second laser chip is a green laser chip, the third laser chip is a blue laser chip, the red laser chip is used for emitting red laser light, the green laser chip is used for emitting green laser light, and the blue laser chip is used for emitting blue laser light.
10. A laser light source device comprising: The device comprises a first laser and a second laser, wherein the first laser is used for emitting laser beams with at least two different wavelengths, the different laser beams emitted by the first laser have different polarization directions, and the laser beams emitted by the first laser comprise first laser beams with first wavelengths; The second laser is used for emitting a second laser beam with the first wavelength, and the polarization direction of the second laser beam is the same as that of the first laser beam; A polarization combining assembly including a polarization adjustment element and a polarization combining element, the polarization adjustment element being disposed at an outgoing side of one of the first laser and the second laser to change a polarization direction of the one of the first laser beam and the second laser beam, the polarization combining element being located on an outgoing path of the first laser and the second laser, the polarization combining element being configured to reflect one of a laser beam of the first laser and a laser beam of the second laser and transmit the other laser beam; and the light homogenizing component is used for homogenizing the laser beam emitted by the polarization light combining element.
11. The laser light source device according to claim 10, wherein the laser light beam emitted from the first laser includes a third laser light beam having a second wavelength, and a polarization direction of the third laser light beam is different from that of the first laser light beam.
12. The laser light source device according to claim 11, wherein the polarization adjustment element is provided on an outgoing optical path of the first laser beam in the first laser, the polarization adjustment element being configured to change a polarization direction of the first laser beam.
13. The laser light source device of claim 12, wherein the first laser light beam has a first polarization direction and the third laser light beam has a second polarization direction; The polarization adjustment element is used for adjusting the first laser beam with a first polarization direction into the first laser beam with a second polarization direction; The polarization adjustment element is arranged on an emergent light path of part of the third laser beam of the first laser, and is used for adjusting part of the third laser beam with the second polarization direction into the third laser beam with the first polarization direction.
14. The laser light source device according to any one of claims 10 to 13, wherein the polarization adjustment element is a half-wave plate.
15. The laser light source device according to any one of claims 10 to 13, wherein the number of the first lasers is two, the two first lasers are arranged at intervals along a first direction, and the second laser is located between the two first lasers, wherein the first direction is a light emitting direction of the first lasers.
16. The laser source device according to any one of claims 10 to 13, wherein the polarization combining component further comprises a prism, the prism is located on the light incident side of the polarization combining element, and the prism is used for adjusting a part of the laser beam.
17. The laser light source device according to any one of claims 10 to 13, wherein the light homogenizing component comprises a diffusion sheet, a lens and a diffusion wheel; The diffusion sheet is positioned on the light emitting side of the polarization light combining element, and the lens is positioned between the diffusion sheet and the diffusion wheel; the polarization light combining element is used for reflecting the laser beams to the diffusion sheet, the diffusion sheet is used for uniformly projecting the received laser beams to the lens, and the lens is used for converging the received laser beams to the diffusion wheel.
18. A laser light source device, comprising: the light emitting assembly comprises a plurality of lasers, and the lasers emit laser beams; The polarization light combining component comprises a polarization light combining element and a polarization adjusting element, the polarization adjusting element is used for adjusting the polarization directions of the laser beams of the laser parts so as to enable the laser beams with the same polarization direction to be adjusted into the laser beams with different polarization directions, and the polarization light combining element is used for combining the laser beams with different polarization directions; and the light homogenizing component is used for homogenizing the laser beam after light combination.
19. A projection system comprising the laser light source device according to any one of claims 1 to 9, or the laser light source device according to any one of claims 10 to 17, or the laser light source device according to claim 18, an illumination system, and a projection lens; the illumination system comprises a dodging element, a shaping lens and a light modulator which are positioned on the light emitting side of the laser light source device; the projection lens is positioned on the light emitting side of the light modulator.

Description

Laser light source device and projection system Cross Reference to Related Applications The present application claims priority from the submission of the national intellectual property office of the people's republic of China at 28 of 2023, application number 202311281815.7, the submission of the national intellectual property office of the people's republic of China at 28 of 2024, application number 202420370139.4, the submission of the national intellectual property office of the people's republic of China at 28 of 2024, and application number 202410219541.7, the entire contents of which are incorporated herein by reference. Technical Field The present application relates to the field of projection technologies, and in particular, to a laser light source device and a projection system. Background Projection display is a technique in which a light source is controlled by planar image information, and an image is enlarged and displayed on a projection surface by an optical system and a projection space. With the development of projection display technology, projection display is gradually applied to the fields of business activities, conference exhibitions, scientific education, military command, traffic management, centralized monitoring, advertisement entertainment and the like, and the advantages of larger display picture size, clear display and the like are also suitable for the requirement of large-screen display. Compared with other light sources, the laser light source has the advantages of high color gamut and high brightness, so that the laser light source is more and more widely applied in the projection field. Lasers currently in mainstream use have been upgraded from single-color lasers to three-color lasers. Based on the design limit of the current laser, a single laser cannot meet the use requirement, and at least two lasers are required to combine light. Disclosure of Invention An embodiment of the present application provides a laser light source device, including: The light emitting assembly comprises a first laser and a second laser, each laser comprises a plurality of laser chips used for emitting three-color laser, the first laser and the second laser are arranged along a first direction, the plurality of laser chips in each laser are arranged into a first light emitting area and a second light emitting area which are arranged along a second direction, the wavelengths of the laser emitted by the first light emitting area and the second light emitting area are different, the first light emitting area of the first laser and the second light emitting area of the second laser are adjacently arranged along the first direction and are aligned along the center of the first direction, the second light emitting area of the first laser and the first light emitting area of the second laser are adjacently arranged along the first direction and are aligned along the center of the first direction, and the first direction and the second direction are mutually perpendicular; The light combination assembly is positioned at the light emitting side of the first laser and the second laser, and is used for combining the laser emitted by the first light emitting area of the first laser with the laser emitted by the second light emitting area of the second laser, combining the laser emitted by the second light emitting area of the first laser with the laser emitted by the first light emitting area of the second laser, emitting along the first direction, wherein the first direction is parallel to the direction of the slow axis of the laser, the divergence angle of the laser emitted by the laser chip along the slow axis is smaller than the divergence angle along the fast axis, and the divergence angle of the laser emitted by the light emitting assembly along the slow axis is larger than the divergence angle along the fast axis. The embodiment of the application also provides a laser light source device, which comprises: The device comprises a first laser and a second laser, wherein the first laser is used for emitting laser beams with at least two different wavelengths, the different laser beams emitted by the first laser have different polarization directions, and the laser beams emitted by the first laser comprise first laser beams with first wavelengths; The second laser is used for emitting a second laser beam with the first wavelength, and the polarization direction of the second laser beam is the same as that of the first laser beam; A polarization combining assembly including a polarization adjustment element and a polarization combining element, the polarization adjustment element being disposed at an outgoing side of one of the first laser and the second laser to change a polarization direction of the one of the first laser beam and the second laser beam, the polarization combining element being located on an outgoing path of the first laser and the second laser, the polarization combining element bein