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CN-116381947-B - Head-up display device and vehicle

CN116381947BCN 116381947 BCN116381947 BCN 116381947BCN-116381947-B

Abstract

The invention relates to a head-up display device and a vehicle. The head-up display device according to one embodiment comprises an image generating unit configured to generate and project light carrying first image information of a first source image to be projected towards the optical assembly, and an optical assembly configured to redirect the light from the image generating unit onto a windshield of a vehicle so that the windshield can reflect the light from the optical assembly to form a first virtual image of the first source image in front of the vehicle, wherein the first virtual image has a proximal end closer to the vehicle and a distal end farther from the vehicle, at least one of the optical assembly and the image generating unit being further configured such that an optical path of the light between the image generating unit and the windshield for the first virtual image becomes progressively longer from light corresponding to the proximal end to light corresponding to the distal end.

Inventors

  • YANG RUIDONG
  • PAN FENGMIN
  • ZHANG SHIKUN

Assignees

  • 大陆汽车车身电子系统（芜湖）有限公司

Dates

Publication Date
20260512
Application Date
20230419

Claims (13)

  1. 1. Head-up display device comprising an image generation unit (11, 21) and an optical assembly (12, 22), wherein: The image generation unit (11, 21) is configured to generate and project light carrying first image information of a first source image to be projected towards the optical assembly (12, 22); The optical assembly (12, 22) is configured to redirect the light from the image generation unit (11, 21) onto a windshield (13, 23) of a vehicle such that the windshield (13, 23) is capable of reflecting light from the optical assembly (12, 22) to form a first virtual image (14, 24) of the first source image in front of the vehicle, Wherein the first virtual image (14, 24) has a proximal end (141, 241) nearer to the vehicle and a distal end (142, 242) farther from the vehicle, At least one of the optical assembly (12, 22) and the image generation unit (11, 21) is further configured such that an optical path of the light between the image generation unit (11, 21) and the windscreen (13, 23) for the first virtual image (14, 24) becomes progressively longer from a light ray (4) corresponding to the proximal end (141, 241) to a light ray (5) corresponding to the distal end (142, 242), Wherein the optical assembly (12) comprises a planar mirror (123), a first free-form optical element (121) and a second free-form optical element (122), wherein, -The planar mirror (123) is configured to redirect the light from the image generation unit (11) towards the first freeform optical element (121); The first freeform optical element (121) is configured to redirect the light from the planar mirror (123) toward the second freeform optical element (122), and The second free-form optical element (122) is configured to redirect light from the first free-form optical element (121) towards the windshield (13), Wherein the first free-form optical element (121) and the second free-form optical element (122) are aspherical mirrors having a non-uniform curvature, and Wherein the curvature of at least one of the first free-form optical element (121) and the second free-form optical element (122) gradually increases from a position where the light (4) corresponding to the proximal end (141) is incident on the respective free-form optical element to a position where the light (5) corresponding to the distal end (142) is incident on the respective free-form optical element.
  2. 2. Head-up display device according to claim 1, wherein the light path between the image generating unit (11, 21) and the windscreen (13, 23) is progressively longer in such a way that the image plane in which the first virtual image (14, 24) is located substantially coincides with the road surface.
  3. 3. Head-up display device according to claim 1 or 2, wherein the image generating unit (11, 21) has a light exit surface (1101, 2101) facing at least a portion of the optical assembly (12, 22), the light exit surface (1101, 2101) of the image generating unit (11, 21) being oriented such that the light path of the light between the image generating unit (11, 21) and the windscreen (13, 23) for the first virtual image (14, 24) becomes progressively longer from a light ray (4) corresponding to the proximal end (141, 241) to a light ray (5) corresponding to the distal end (142, 242).
  4. 4. A head-up display device according to claim 3, wherein the image generation unit (11, 21) comprises: a light source (151, 251); A display unit (111, 211) located in an optical path between the light source (151, 251) and the optical component (12, 22), wherein a light-emitting surface of the display unit (111, 211) is a light-emitting surface (1101, 2101) of the image generation unit (11, 21), and A light guide (152, 252) located in an optical path between the light source (151, 251) and the display unit (111, 211), the light guide (152, 252) being configured to guide light from the light source (151, 251) to the display unit (111, 211), Wherein the light guide (152, 252) has a first face (1521, 2521) facing the display unit (111, 211) and a second face (1522, 2522) opposite to the first face (1521, 2521), wherein the first face (1521, 2521) is inclined with respect to the second face (1522, 2522) such that the distance of the first face (1521, 2521) from the second face (1522, 2522) at the side from which the light (5) corresponding to the distal end (142, 242) originates is smaller than the distance of the first face (1521, 2521) from the second face (1522, 2522) at the side from which the light (4) corresponding to the proximal end (141, 241) originates, and The light-emitting surface of the display unit (111, 211) is oriented parallel to the first surface (1521, 2521).
  5. 5. The heads-up display device of claim 4 wherein the first face (1521, 2521) is inclined at an angle of no less than 25 degrees relative to the second face (1522, 2522).
  6. 6. The head-up display device according to claim 1, wherein the curvature of the first free-form optical element (121) gradually increases from a position on the first free-form optical element where the light ray (4) corresponding to the proximal end (141) is incident to a position on the first free-form optical element where the light ray (5) corresponding to the distal end (142) is incident, and the second free-form optical element (122) is further configured to pre-correct astigmatism caused by the windshield (13).
  7. 7. The heads-up display device of claim 1 wherein the first source image is an inverted image and wherein the second freeform optical element (122) is further arranged to invert the first virtual image (14) relative to the first source image such that light rays (5) corresponding to the distal end (142) come from a bottom of the first source image and light rays (4) corresponding to the proximal end (141) come from a top of the first source image.
  8. 8. The heads-up display device according to claim 1 or 2, wherein the optical assembly (12, 22) further comprises a wedge-shaped mirror (124, 224) arranged at one side of the light exit surface (1101, 2101) of the image generating unit (11, 21), the wedge-shaped mirror (124, 224) being arranged such that light rays (5) from the image generating unit (11, 21) and corresponding to the distal end (142, 242) are transmitted through a thicker portion of the wedge-shaped mirror (124, 224), and light rays (4) from the image generating unit (11, 21) and corresponding to the proximal end (141, 241) are transmitted through a thinner portion of the wedge-shaped mirror (124, 224).
  9. 9. The heads-up display device of claim 8 wherein at least a portion of a surface of the wedge mirror (124, 224) remote from the image generation unit (11, 21) is an outwardly protruding curved surface.
  10. 10. The head-up display device according to claim 9, wherein the curvature of the curved surface is designed to gradually increase from a position where light rays (4) from the image generating unit (11, 21) and corresponding to the proximal end (141, 241) exit from the wedge-shaped mirror (124, 224) to a position where light rays (5) from the image generating unit (11, 21) and corresponding to the distal end (142, 242) exit from the wedge-shaped mirror (124, 224).
  11. 11. The head-up display device according to claim 1 or 2, wherein the image generation unit (11, 21) is further configured to generate light carrying second image information of a second source image to be projected, The optical assembly (12, 22) is further configured to redirect light carrying the second image information from the image generation unit (11, 21) to the windshield (13, 23) such that the windshield (13, 23) is capable of reflecting light from the optical assembly (12, 22) to form a second virtual image (16, 26) of the second source image in front of the vehicle, wherein the distance of the second virtual image (16, 26) from the vehicle is smaller than the distance of the first virtual image (14, 24) from the vehicle.
  12. 12. Head-up display device according to claim 11, wherein the image plane of the second virtual image (16, 26) is substantially perpendicular to the road surface.
  13. 13. A vehicle comprising a windscreen (13, 23) and a head-up display device (20, 50, 60, 80, 90, 100, 110) according to any one of claims 1 to 12, the windscreen (13, 23) being configured to form a first virtual image (14, 24) of a first source image to be projected in front of the vehicle by reflecting light from the head-up display device (20, 50, 60, 80, 90, 100, 110) carrying the first image information of the first source image.

Description

Head-up display device and vehicle Technical Field The embodiment of the invention relates to the technical field of optical display, in particular to a head-up display device and a vehicle. Background Various vehicles such as vehicles become an indispensable part of life in modern society, but driving safety problems become important problems threatening the life safety of people. In driving, a driver can ensure reliable driving by closely paying attention to related driving information on an instrument panel of a vehicle, however, because the volume of the vehicle is limited, the instrument panel is designed below a console, so that the driver needs to look at the related information on the instrument panel through a low head in the driving process, and in actual driving, the action frequency of looking at the information on the instrument panel through the low head is very high, and the driver is likely to be distracted in the low head process, so that traffic accidents are caused. A head-up display (HUD) is commonly used in, for example, the automotive industry to insert content to be displayed into the driver's field of view, allowing the driver of the vehicle to view the content in the driver's line of sight. This can reduce the time for the driver to leave the driving route with eyes due to frequent head-down to some extent. Disclosure of Invention The embodiment of the invention provides a head-up display device and a vehicle. In one aspect of the present disclosure, a head-up display device is provided. The head-up display device comprises an image generating unit configured to generate and project light carrying first image information of a first source image to be projected towards the optical assembly, and an optical assembly configured to redirect the light from the image generating unit onto a windshield of a vehicle so that the windshield can reflect the light from the optical assembly to form a first virtual image of the first source image in front of the vehicle, wherein the first virtual image has a proximal end closer to the vehicle and a distal end farther from the vehicle, at least one of the optical assembly and the image generating unit being further configured to cause an optical path of the light between the image generating unit and the windshield for the first virtual image to become progressively longer from light corresponding to the proximal end to light corresponding to the distal end. In some embodiments of the present disclosure, the optical path between the image generation unit and the windshield is gradually lengthened in such a manner that an image plane in which the first virtual image is located substantially conforms to a road surface. In some embodiments of the present disclosure, the image generation unit has a light exit face facing at least a portion of the optical assembly, the light exit face of the image generation unit being oriented such that an optical path of the light between the image generation unit and the windshield for the first virtual image becomes progressively longer from a light ray corresponding to the proximal end to a light ray corresponding to the distal end. In some embodiments of the present disclosure, the image generation unit includes a light source, a display unit located in an optical path between the light source and the optical assembly, wherein a light exit surface of the display unit is a light exit surface of the image generation unit, and a light guide located in the optical path between the light source and the display unit, the light guide configured to guide light from the light source to the display unit, wherein the light guide has a first face facing the display unit and a second face opposite the first face, wherein the first face is inclined with respect to the second face such that a distance from the second face at a side from which light corresponding to the distal end originates is less than a distance from the second face at a side from which light corresponding to the proximal end originates, and the light exit surface of the display unit is oriented parallel to the first face. In some embodiments of the present disclosure, the first face is inclined at an angle of not less than 25 degrees relative to the second face. In some embodiments of the present disclosure, the optical assembly includes a planar mirror configured to redirect the light from the image generation unit toward the free-form optical element and a free-form optical element configured to redirect the light from the planar mirror toward the windshield. In some embodiments of the disclosure, the free-form optical element is an aspherical mirror having a non-uniform curvature, and the free-form optical element is further configured to pre-correct for astigmatism caused by the windshield. In some embodiments of the disclosure, the first source image is an inverted image, and wherein the freeform optical element is further arranged to invert the first vir