Projection apparatus, display device, projection system, and vehicle

By introducing a movable second reflector and optical path folding technology into the projection device, the problem of optical path obstruction is solved, the display area is increased, the user experience is improved, and multi-mode projection is realized.

WO2026156647A1PCT designated stage Publication Date: 2026-07-30YINWANG INTELLIGENT TECHNOLOGIES CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
YINWANG INTELLIGENT TECHNOLOGIES CO LTD
Filing Date
2025-01-23
Publication Date
2026-07-30

AI Technical Summary

Technical Problem

In existing projection systems, after the reflected beam is reflected by the mirror, part of the beam enters the lens, causing light path obstruction and reducing the display area and user experience.

Method used

By introducing a movable second reflector into the projection device and controlling its movement relative to the lens, the image beam can be propagated in multiple directions. The light path is folded by the first reflector, increasing the distance between the second reflector and the lens, thus decoupling the reflected beam from the lens and achieving multi-mode projection.

Benefits of technology

It solves the problem of light path obstruction, increases the display area, improves the user experience, and meets a variety of viewing needs.

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Abstract

Embodiments of the present application relate to the technical field of projection, and provide a projection apparatus, a display device, a projection system, and a vehicle. The projection apparatus comprises an image source, a lens module, a second mirror, and a driving member. The image source is used for generating an image beam. The lens module is used for receiving the image beam from the image source, and comprises a first mirror and a plurality of lenses. The second mirror is use for reflecting the image beam from the lens module. The driving member is transmittingly connected to the second mirror and is used for driving the second mirror to move relative to the lens module. By using the first mirror in conjunction with the second mirror, the problem of light path obstruction can be solved.
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Claims

1. A projection device (110), characterized in that, include: Image source (10) is used to generate image beams; A lens (20) for receiving an image beam from the image source (10) and including a first mirror (21) and a plurality of lenses; A second reflecting mirror (30) is used to reflect the image beam from the lens (20); The driving element (40) is connected to the second reflector (30) and is used to drive the second reflector (30) to move relative to the lens (20).

2. The projection device (110) according to claim 1, characterized in that, The lens (20) includes a first mirror group (22), a first mirror (21), and a second mirror group (23) arranged from the image side to the object side. The first mirror (21) is used to refract the optical path between the first mirror group (22) and the second mirror group (23). The first mirror group (22) includes at least one lens, and the second mirror group (23) includes at least one lens.

3. The projection device (110) according to claim 2, characterized in that, The angle between the first optical axis of the first lens group (22) and the second optical axis of the second lens group (23) is greater than or equal to 80° and less than or equal to 100°.

4. The projection device (110) according to claim 2 or 3, characterized in that, The lens (20) also includes an aperture stop (24) located between the first lens group (22) and the second lens group (23), and close to the first mirror (21).

5. The projection device (110) according to claim 4, characterized in that, The first reflector (21) and the aperture (24) are arranged side by side along the direction from the image side to the object side, or the aperture (24) is fitted onto the first reflector (21).

6. The projection device (110) according to any one of claims 1 to 5, characterized in that, The second reflector (30) is located on the light-emitting side of the lens (20) and reflects the image beam emitted from the lens (20). The driving member (40) is used to drive the second reflector (30) to rotate so that the second reflector (30) reflects the image beam from the lens (20) to multiple different reflection paths.

7. The projection device (110) according to any one of claims 1 to 6, characterized in that, At least one of the first reflector (21) and the second reflector (30) is a plane reflector.

8. The projection device (110) according to any one of claims 1 to 7, characterized in that, The image source (10) includes: Light source (11); A modulation device (12) is used to modulate the light emitted by the light source (11) to obtain the image beam including image information.

9. The projection device (110) according to claim 8, characterized in that, The modulation device (12) is any one of a liquid crystal display, a silicon-based liquid crystal, a digital micromirror device, or a thin-film transistor.

10. A display device, characterized in that, Includes a processor and a projection device (110) as described in any one of claims 1 to 9; The processor is used to send image data to the image source (10) of the projection device (110) so that the image source (10) generates the image beam.

11. A projection system (100), characterized in that, It includes a first display element (120), a second display element (130), and a projection device (110) as described in any one of claims 1 to 9, or it includes a first display element (120), a second display element (130), and a display device as described in claim 10; The projection system (100) has a first projection mode and a second projection mode. The driving element (40) drives the second reflector (30) to move relative to the lens (20), so that the projection system (100) switches between the first projection mode and the second projection mode, wherein: When the projection system (100) is in the first projection mode, the image beam emitted from the projection device (110) is incident on the first display (120) and forms an image on the first display (120); When the projection system (100) is in the second projection mode, the image beam emitted from the projection device (110) is incident on the second display (130) and an image is formed on the second display (130).

12. The projection system (100) according to claim 11, characterized in that, Both the first display element (120) and the second display element (130) are screens.

13. The projection system (100) according to claim 12, characterized in that, The first display unit (120) is a front projection screen, and the second display unit (130) is a rear projection screen.

14. A means of transportation, characterized in that, Including the projection system (100) as described in any one of claims 11 to 13.

15. The means of transport according to claim 14, characterized in that, Along the length of the vehicle, the first display element (120) and the second display element (130) of the projection system (100) are arranged side by side and spaced apart, and the projection device (110) of the projection system (100) is located between the first display element (120) and the second display element (130).