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A vehicle-mounted projection device

A projection device and projection technology, which are used in optical observation devices, vehicle components, transportation and packaging, etc., to achieve the effects of increasing magnification, suppressing deformation, and correcting deformation

Active Publication Date: 2015-05-06
DUALITAS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When it is desired to minimize the distortion of the displayed image even if the position of the driver's eyes changes, it is difficult to correct the displayed image with only one mirror

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0045] (vehicle structure)

[0046] Such as figure 1 As shown, the in-vehicle projection device 10 according to the embodiment of the present invention is a so-called head-up display, and is used to be embedded in the dashboard 2 in front of the vehicle interior of the automobile 1 . Projection from the vehicle-mounted projection device 10 onto the display area 3 a of the windshield 3 figure 2 Display image 70 is shown.

[0047] Since the display area 3 a functions as a semi-reflective surface, the display image 70 projected on the display area 3 a is reflected toward the driver 5 in the display area 3 a, and a virtual image 6 is formed in front of the windshield 3 . By visually observing the virtual image 6 in front of the windshield 3 , the driver 5 can observe various information displayed on the front above the steering wheel 4 .

[0048] (Overall structure of the vehicle-mounted projection device 10)

[0049] Such as image 3As shown, the housing of the vehicle-moun...

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PUM

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Abstract

The invention provides a vehicle-mounted projection device. When the vehicle-mounted projection device projects a holographic image projected on a screen on a windshield, deformation of the image can be fully corrected even if the multiplying power is raised. According to the vehicle-mounted projection device, phase modulation is carried out on laser through utilization of a phase modulation array to enable the holographic image (70h) to form on the screen. The holographic image (70h) is reflected by a reflector (55a) of a first projection mirror (55) and a reflector (56a) of a second projection mirror (56) on the windshield. A projection ratio is set through utilization of the first projection mirror (55) and the second projection mirror (56), and deformation of the image due to inclination and bending of the windshield is corrected. Correction is realized through utilization of the two projection mirrors, so that deformation of the image can be suppressed even if the projection ratio is raised.

Description

technical field [0001] The present invention relates to a vehicle-mounted projection device for projecting a display image onto a display area of ​​a windshield of an automobile. Background technique [0002] In a vehicle-mounted projection device called a head-up display (Head Up Display), a display image is projected onto a display area of ​​a windshield. Since the windshield functions as a semi-reflective surface, the driver sees a virtual image of the display image formed in front of the windshield. [0003] The windshield is tilted upward and downward relative to the driver's line of sight, and is curved in the left-right direction and vertical direction. Therefore, in the vehicle-mounted projection device, it is necessary to project an image corrected for the tilt and curvature of the windshield. [0004] In the head-up display described in Patent Document 1 below, projected light from the display is reflected by a concave mirror and projected onto a windshield. In t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/01
CPCB60R1/00B60R2300/20G02B27/0101G02B27/0103G02B2027/011
Inventor 染野义博酒井重史松尾荣树
Owner DUALITAS LTD
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