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US 12,502,959 B2Granted
Display device, vehicle, and method for controlling vehicle
AssigneeBYD Company Limited
InventorsYilin Zhong, Chunfen Wu, Jiang Huang, Jun Dai, Fengwu Su
Life of this patent
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Abstract
A display device includes a beam generator and a holographic optical waveguide. The beam generator includes a display and is configured to generate beams having image information displayed on the display. The holographic optical waveguide is configured to display an image of a second size at a position at a first distance behind the display device based on the beams having the image information, the second size is a multiple of the first size of the display, and the multiple is greater than 1.
Claims20
A display device, comprising:
- a beam generator, comprising a display and configured to generate beams having image information displayed on the display, wherein the display has a first size;
- and
- a holographic optical waveguide, configured to display an image of a second size at a position at a first distance behind the display device based on the beams having the image information, wherein the second size is a multiple of the first size;
- and the multiple is greater than 1, wherein:
- the holographic optical waveguide comprises an optical waveguide coupling-in structure and an optical waveguide coupling-out structure;
- the optical waveguide coupling-out structure comprises a holographic plate;
- light information of object light and reference light are pre-recorded on the holographic plate;
- and distances from the object light and the reference light to the holographic plate, the multiple, and the first distance meet following formulas:
- M
- =
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- 1
- -
- l
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- "\[RightBracketingBar]"
- -
- 1
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- =
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- wherein M is the multiple;
- lo is a distances from the object light to the holographic plate;
- lr is a distance from the reference light to the holographic plate;
- and lI is the first distance.
40 more elements
A vehicle, comprising a display device, comprising:
- a beam generator, comprising a display and configured to generate beams having image information displayed on the display, wherein the display has a first size;
- and
- a holographic optical waveguide, configured to display an image of a second size at a position at a first distance behind the display device based on the beams having the image information, wherein the second size is a multiple of the first size;
- and the multiple is greater than 1, wherein:
- the holographic optical waveguide comprises an optical waveguide coupling-in structure and an optical waveguide coupling-out structure;
- the optical waveguide coupling-out structure comprises a holographic plate;
- light information of object light and reference light are pre-recorded on the holographic plate;
- and distances from the object light and the reference light to the holographic plate, the multiple, and the first distance meet following formulas:
- M
- =
- ❘
- "\[LeftBracketingBar]"
- 1
- -
- l
- o
- /
- l
- r
- ❘
- "\[RightBracketingBar]"
- -
- 1
- ,
- 1
- /
- l
- i
- =
- 1
- /
- l
- o
- -
- 1
- /
- l
- r
- ,
- wherein M is the multiple;
- lo is a distances from the object light to the holographic plate;
- lr is a distance from the reference light to the holographic plate;
- and lI is the first distance.
40 more elements
A method for controlling a vehicle, the vehicle comprising a front seat, a rear seat, and a display device,
- the display device being disposed on a headrest or a back of the front seat, and comprising:
- a beam generator, comprising a display and configured to generate beams having image information displayed on the display, wherein the display has a first size;
- and
- a holographic optical waveguide, configured to display an image of a second size at a position at a first distance behind the display device based on the beams having the image information, wherein the second size is a multiple of the first size;
- and the multiple is greater than 1;
- and
- the method comprising:
- determining that the display device is in an operating state;
- obtaining relative positions of the display device and eyes of a passenger on the rear seat according to positions and angles of the front seat and the rear seat;
- and
- when the relative positions do not meet a condition, adjusting a position of at least one of the front seat and the rear seat.
8 more elements
Dependencies are inferred from the claim text.