CN-121995685-A - Illumination system and projection device

Abstract

The invention discloses an illumination system and a projection device. The illumination system comprises a first light source module, a second light source module and a first light splitting element. The first light source module is used for providing a first light beam transmitted along a first direction. The second light source module is used for providing a second light beam transmitted along a second direction. The first light splitting element is arranged between the first light source module and the second light source module, the first light splitting element is used for reflecting the first light beam to enable the first light beam to be transmitted to the optical element along the second direction, and the first light splitting element is used for enabling the second light beam to pass through and be transmitted to the optical element along the second direction, wherein light spots formed by the first light beam and the second light beam on the optical element are at least partially overlapped to form a first light spot group and a second light spot group, and the first light spot group and the second light spot group are arranged along the first direction. The illumination system and the projection device can effectively improve the brightness of illumination light beams.

Inventors

• WENG YIXUAN
• Lv Junxin
• ZHONG WENJIE

Assignees

• 中强光电股份有限公司

Dates

Publication Date

20260508

Application Date

20241105

Claims (20)

1. 1. A lighting system, comprising: The first light source module is used for providing a first light beam transmitted along a first direction, and the first light beam comprises at least one of a first sub-light beam, a second sub-light beam and a third sub-light beam; a second light source module for providing a second light beam transmitted along a second direction, the second light beam including at least one of a first sub-beam, a second sub-beam and a third sub-beam, wherein the first direction is different from the second direction, and A first light splitting element disposed between the first light source module and the second light source module, the first light splitting element being configured to reflect the first light beam, so that the first light beam is transmitted to the optical element along the second direction, and the first light splitting element being configured to allow the second light beam to pass through and be transmitted to the optical element along the second direction, The light spots formed by the first sub-beams of the first light beam on the optical element are at least partially overlapped with the light spots formed by the second sub-beams and the third sub-beams of the second light beam on the optical element respectively, and form a first light spot group, the light spots formed by the first sub-beams of the second light beam on the optical element are at least partially overlapped with the light spots formed by the first sub-beams and the third sub-beams of the first light beam on the optical element respectively, and form a second light spot group, and the first light spot group and the second light spot group are arranged along the first direction.
2. 2. The illumination system of claim 1, wherein the first light splitting element comprises a first light splitting region for reflecting and passing the first sub-beam of the first light beam and a second light splitting region for reflecting and passing the first sub-beam of the first light beam and the second sub-beam of the second light beam.
3. 3. The lighting system of claim 1, wherein the first light source module comprises a first light emitting unit, a second light emitting unit, and a third light emitting unit, wherein the second light emitting unit and the third light emitting unit are arranged in parallel, and the first light emitting unit is located on the same side as the second light emitting unit and the third light emitting unit.
4. 4. The lighting system of claim 1, wherein the first light source module and the second light source module are in an L-shaped configuration.
5. 5. The illumination system of claim 1, wherein the illumination system further comprises: a third light source module for providing a third light beam transmitted along the first direction; A fourth light source module to provide a fourth light beam transmitted along a third direction, the third direction being different from the first direction and the second direction; A second light-splitting element disposed between the third light source module and the fourth light source module, the second light-splitting element being configured to reflect the third light beam and to pass the fourth light beam, and A first optical element for passing at least a portion of the first and second light beams and for reflecting at least a portion of the third and fourth light beams such that the first, second, third and fourth light beams are transmitted to the optical element; Wherein at least part of the light spots formed by the third light beam on the optical element and at least part of the light spots formed by the fourth light beam on the optical element are at least partially overlapped and form a third light spot group and a fourth light spot group, and the third light spot group and the fourth light spot group are arranged along the first direction.
6. 6. The illumination system of claim 5, wherein the first optical element is a zoned optical element, the zoned optical element comprising a plurality of first transmissive regions and a plurality of first reflective regions, the plurality of first transmissive regions and the plurality of first reflective regions being staggered.
7. 7. The illumination system of claim 6, wherein the third light source module and the fourth light source module are disposed symmetrically to the first light source module and the second light source module, respectively, along the extending direction of the first optical member, and wherein the plurality of first transmissive regions and the plurality of first reflective regions are disposed in a staggered manner along the extending direction.
8. 8. The illumination system of claim 5, wherein the first set of spots, the second set of spots, the third set of spots, and the fourth set of spots are staggered with respect to each other in the first direction.
9. 9. The illumination system of claim 5, further comprising a second optic, wherein: The first optical element is a transflective optical element for passing a portion of the first, second, third, and fourth light beams and for reflecting another portion of the first, second, third, and fourth light beams, and The second optical element is disposed on a transmission path of the third light beam and the fourth light beam from the portion of the first optical element and on a transmission path of the first light beam and the second light beam from the other portion of the first optical element, the second optical element is used for reflecting the first light beam and the second light beam of the other portion and the third light beam and the fourth light beam of the portion, so that the first light beam and the second light beam of the other portion and the third light beam and the fourth light beam of the portion are transmitted to the optical element, The first sub-light spot group, the second sub-light spot group, the third sub-light spot group and the fourth sub-light spot group are staggered in the first direction, wherein the plurality of light spots formed by the first light beam on the optical element in the other part and the plurality of light spots formed by the second light beam on the optical element in the other part are at least partially overlapped to form a first sub-light spot group and a second sub-light spot group, and the plurality of light spots formed by the third light beam on the optical element in the part and the plurality of light spots formed by the fourth light beam on the optical element in the part are at least partially overlapped to form a third sub-light spot group and a fourth sub-light spot group.
10. 10. The illumination system of claim 9, wherein the first set of spots, the second set of spots, the third set of spots, and the fourth set of spots are aligned with the first set of sub-spots, the second set of sub-spots, the third set of sub-spots, and the fourth set of sub-spots, respectively, along the third direction.
11. 11. The illumination system of claim 10, further comprising a third optical element disposed in a path of the first and second light beams from the first light splitting element, the third optical element being configured to reflect at least a portion of the first and second light beams such that at least a portion of the first and second light beams are transmitted to the first optical element.
12. 12. The illumination system of claim 11, wherein the first light source module and the second light source module are juxtaposed with the third light source module and the fourth light source module, respectively.
13. 13. The illumination system of claim 11, further comprising a fourth optic, wherein: The third optical element is used for allowing the first light beam and the second light beam of the first part to pass through and be transmitted to the fourth optical element, and is also used for reflecting the first light beam and the second light beam of the second part and being transmitted to the first optical element, and The fourth optical element is configured to reflect the first light beam and the second light beam of the first portion, so that the first light beam and the second light beam of the first portion are transmitted to the second optical element, and the second optical element is configured to pass the first light beam and the second light beam of the first portion.
14. 14. The illumination system of claim 13, wherein the first optical element comprises at least one semi-reflective region, the second optical element comprises a plurality of reflective regions and a plurality of transmissive regions, the reflective regions and the transmissive regions of the second optical element are staggered, the third optical element comprises at least one semi-reflective region, and the fourth optical element comprises at least one reflective region.
15. 15. The illumination system of claim 13, further comprising a fifth light source module for providing a fifth light beam, wherein the third optical element is configured to reflect at least a portion of the fifth light beam such that the portion of the fifth light beam is transmitted to the fourth optical element and another portion of the fifth light beam is transmitted such that the portion of the fifth light beam is transmitted to the first optical element.
16. 16. A lighting system as recited in claim 5, wherein said lighting system further comprises: A fifth light source module for providing a fifth light beam transmitted along the first direction; a sixth light source module for providing a sixth light beam transmitted along the second direction; a third beam splitter for reflecting the fifth light beam, for passing the sixth light beam, and for transmitting the fifth light beam and the sixth light beam to the optical element; Wherein at least part of the light spots formed by the fifth light beam on the optical element and at least part of the light spots formed by the sixth light beam on the optical element are at least partially overlapped and form a fifth light spot group and a sixth light spot group, the fifth light spot group and the sixth light spot group are arranged along the first direction.
17. 17. The illumination system of claim 16 wherein the fifth set of spots and the sixth set of spots are aligned with the first set of spots, the second set of spots, the third set of spots and the fourth set of spots along the third direction.
18. 18. The illumination system of claim 16, wherein the fifth light source module and the sixth light source module are juxtaposed with the first light source module and the second light source module, respectively.
19. 19. The illumination system of claim 16, further comprising a second optic, wherein: The first optical member is used for passing part of the third light beam and the fourth light beam and reflecting the other part of the third light beam and the fourth light beam, and The second optical element is used for allowing the fifth light beam and the sixth light beam to pass through, and reflecting the part of the third light beam and the fourth light beam, so that the part of the third light beam, the part of the fourth light beam, the fifth light beam and the sixth light beam are transmitted to the optical element.
20. 20. The illumination system of claim 19, wherein the first optical member comprises a plurality of semi-reflective regions and a plurality of transmissive regions, the plurality of semi-reflective regions and the plurality of transmissive regions of the first optical member are staggered, and the second reflective element comprises a plurality of reflective regions and a plurality of transmissive regions, the plurality of reflective regions and the plurality of transmissive regions of the second reflective element are staggered.

Description

Illumination system and projection device Technical Field The present invention relates to an optical system and an electronic device, and more particularly, to an illumination system and a projection device. Background A projection device (e.g., a projector) is a display device for generating a picture. The imaging principle of the projection device is that the light valve is used for converting the illumination beam generated by the illumination system into an image beam, and then the projection lens is used for projecting the image beam onto a projection surface such as a screen or a wall surface. As projection devices are widely used in different environments, projection devices are correspondingly designed to have smaller dimensions. In order to increase the brightness of the illumination beam, light is generally combined through multiple groups of light sources. However, the plurality of sets of light sources have an excessively large spot size formed on the optical element, resulting in a corresponding increase in the volume of the projection apparatus. The background section is only for the purpose of aiding in the understanding of the present invention and thus the disclosure of the background section may include any of the prior art that does not form part of the knowledge of a person of ordinary skill in the art. The disclosure of the background section is not section (i.e., is) for the purpose of presenting the context or the problems underlying one or more embodiments of the invention, as it is known or understood by those of ordinary skill in the art prior to the application of the present invention. Disclosure of Invention The invention provides an illumination system and a projection device, which enable at least two light spots to be at least partially overlapped on an optical element, can effectively improve the brightness of illumination light beams, and does not need to increase the volume of the projection device outside e. Other objects and advantages of the present invention will be further appreciated from the technical features disclosed in the present invention. In order to achieve one or a part or all of the above or other objects, an embodiment of the invention provides an illumination system including a first light source module, a second light source module, and a first light splitting element. The first light source module is used for providing a first light beam transmitted along a first direction, and the first light beam comprises at least one of a first sub-light beam, a second sub-light beam and a third sub-light beam. The second light source module is configured to provide a second light beam transmitted along a second direction, where the second light beam includes at least one of a first sub-beam, a second sub-beam, and a third sub-beam, and the first direction is different from the second direction. The first beam splitting element is disposed between the first light source module and the second light source module, and is configured to reflect the first light beam, so that the first light beam is transmitted to the optical element along the second direction, and the first beam splitting element is configured to allow the second light beam to pass through and be transmitted to the optical element along the second direction, where a light spot formed by the first sub-beam of the first light beam on the optical element is at least partially overlapped with a light spot formed by the second sub-beam of the second light beam and the third sub-beam on the optical element, and forms a first light spot group, and light spots formed by the first sub-beam of the second light beam on the optical element are at least partially overlapped with a light spot formed by the second sub-beam and the third sub-beam of the first light beam on the optical element, and form a second light spot group, and the first light spot group and the second light spot group are arranged along the first direction. To achieve one or a part or all of the above or other objects, one embodiment of the present invention provides a projection apparatus including an illumination system, a light valve module, and a projection lens as described above. An illumination system is used to provide an illumination beam comprising at least one of the first beam and to the second beam from the optical element. The light valve module is positioned on the transmission path of the illumination light beam and is used for converting the illumination light beam into an image light beam. The projection lens is positioned on the transmission path of the image light beam and is used for projecting the image light beam out of the projection device. Based on the foregoing, embodiments of the present invention have at least one of the following advantages or effects. According to the illumination system and the projection device provided by the embodiment of the invention, at least two light spots are at least partially overlapped