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Head-up display and image display system

A head-up display and image technology, which is applied to the components of the TV system, image communication, instruments, etc., can solve the problems of high cost and achieve the effect of preventing heat damage

Pending Publication Date: 2022-05-10
KOITO MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in Patent Document 2, components for suppressing the temperature rise of the display are separately required, resulting in high cost.

Method used

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  • Head-up display and image display system
  • Head-up display and image display system

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Experimental program
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Effect test

no. 1 approach

[0054] figure 2 It is a schematic diagram of the HUD 40 according to the first embodiment viewed from the side surface of the vehicle 1 . like figure 2 As shown, the HUD 40 has a HUD body portion 401 . The HUD main body portion 401 has a casing 402 and an exit window 403 . The exit window 403 is formed of a transparent plate that transmits light. The HUD main body 401 includes a picture generation unit (PGU: Picture Generation Unit) 404 housed in the casing 402 , a lens 405 (an example of a second optical element), a concave mirror 406 (an example of a reflection unit), a ND (Neutral Density) filter 407 (an example of the first optical element) and control substrate 408 .

[0055] The image generating unit 404 is configured to emit light for generating a predetermined image to be displayed toward the occupant of the vehicle 1 . The image generation unit 404 omits detailed illustration, but includes a light source, optical components, and a display device. The light sou...

no. 2 approach

[0074] Figure 4 It is a schematic diagram explaining the function of the ND filter 407A in the HUD 140 according to the second embodiment.

[0075] like Figure 4As shown, in the HUD 140 of the second embodiment, the ND filter 407A that reduces the transmittance of light including at least visible light (eg, sunlight) is disposed between the concave mirror 406 and the windshield 18 , which is different from the There is a difference in the HUD 40 of the first embodiment in which the ND filter 407 is arranged between the image generating unit 404 and the concave mirror 406 . The ND filter 407A is attached to the casing 402 in a state of covering a part of the surface of the exit window 403 of the HUD main body 401 .

[0076] The ND filter 407A is provided at a position where a part of the light, which is emitted from the light exit surface 410 of the image generating unit 404 and then reflected by the lens 405 on the concave mirror 406 and is directed toward the windshield 1...

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Abstract

A head-up display (40) is provided with: an image generation unit (404) that emits first light that generates a first image (Ia) at a position separated from a vehicle (1) by a predetermined distance, and second light that generates a second image (Ib) at a position separated from the vehicle (1) by a distance different from the predetermined distance; and a reflection unit (406) that reflects the first light and the second light such that the first light and the second light irradiate the windshield (18). A first optical element (407) is provided between the image generation unit (404) and the windshield (18) at a position through which the second light passes, said first optical element (407) reducing the transmittance of light including at least visible light than the first light.

Description

technical field [0001] The invention relates to a head-up display and an image display system. Background technique [0002] In the future, a mixture of vehicles traveling in an automatic driving mode and vehicles traveling in a manual driving mode is expected on public roads. [0003] It is expected that in the future autonomous driving society, visual communication between vehicles and humans will become more and more important. For example, it is envisioned that visual communication between a vehicle and an occupant of that vehicle will become increasingly important. In this regard, a head-up display (HUD) can be used to enable visual communication between the vehicle and the occupant. The head-up display projects an image or video on the windshield or the synthesizer, and superimposes the image on the real space through the windshield or the synthesizer so that the occupants can visually recognize it, thereby realizing so-called AR (Augmented Reality). [0004] As an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K35/00G02B27/01H04N5/64
CPCB60K35/00G02B27/01H04N5/64B60K2370/1529B60K2370/25B60K2370/23G02B27/0101G02B2027/0185B60K2370/21G02B2027/0138
Inventor 伊藤由莉
Owner KOITO MFG CO LTD
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