Windshield type head up display and method for weakening double image

A head-up display and windshield technology, applied in transportation and packaging, optics, instruments, etc., can solve the problem of high cost and achieve the effect of weakening ghosting

Pending Publication Date: 2018-02-16
SUZHOU CARROBOT AUTOMOTIVE ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above solutions to solve ghost images all need to change the stru

Method used

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  • Windshield type head up display and method for weakening double image
  • Windshield type head up display and method for weakening double image
  • Windshield type head up display and method for weakening double image

Examples

Experimental program
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example 1

[0091] Such as Figure 5As shown, the windshield-type head-up display device in this embodiment in this embodiment is used to project and display image information, including: an image source 1 and a projection group (2, 3, 5), and the image source 1 passes through the The projection group projection forms the first virtual image 6 and the second virtual image 7, and when the imaging distance increases, the ghost value of the first virtual image 6 and the second virtual image 7 decreases, and the first virtual image 5 reaches the eye box area The distance of 4 is: imaging distance. In the prior art, the imaging distance of the general head-up display device is about 2m, and the ghosting is large. The windshield-type head-up display device in this embodiment has a relatively large imaging distance, and the imaging distance is ≥ 4m. The larger the imaging distance, the smaller the ghost value. As a preference in this embodiment, the projection group (2, 3, 5) includes: a firs...

example 2

[0107] Such as Figure 7 As shown, the windshield-type head-up display device in this embodiment is used to project and display image information, including: image source 1 and projection group (2, 3, 5), and the The image source 1 is projected through the projection group to form a first virtual image 6 and a second virtual image 7. When the imaging distance increases, the ghosting values ​​of the first virtual image 6 and the second virtual image 7 decrease, and the first virtual image The distance from 5 to eye box area 4 is: imaging distance. As a preference in this embodiment, the first virtual image 6 is on the side away from the eye box area 4 in the meridian plane imaging 61 relative to the sagittal plane imaging 62, and the meridian plane imaging 6 is greater than the diopter of the human eye relative to the sagittal plane Imaging 62 diopters. The imaging distance is ≥ 4m. As a preference in this embodiment, the projection group (2, 3, 5) includes: a first reflecto...

Embodiment 3

[0126] In this embodiment, the windshield type head-up display device in this embodiment is used to project and display image information, including: image source 1 and projection group (2, 3, 5), and the image source 1 Form the first virtual image 6 and the second virtual image 7 through the projection of the projection group. When the imaging distance increases, the ghosting value of the first virtual image 6 and the second virtual image 7 decreases, and the first virtual image 5 reaches the eye. The distance of box area 4 is: imaging distance. As a preference in this embodiment, the projection group (2, 3, 5) includes: a first reflector 2, a second reflector 3 and a windshield 5, and light passes through the first reflector 2, the The second reflector 3 and the inner surface of the windshield 5 reflect and enter the eye box area 4 to form a first virtual image 6 .

[0127] As a preference in this embodiment, the light is sequentially transmitted through the first reflector...

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Abstract

The invention discloses a windshield type head up display and a method for weakening a double image. The windshield type head up display includes an image source and a projection group. The image source is projected to a windshield through the projection group, and forms a first virtual image and a second virtual image on the same side of the windshield. The first virtual image approaches the areaof an eye box with respect to the second virtual image. The distance between the first virtual image and the area of the eye box is an imaging distance. When the imaging distance changes, the value of the first virtual image and the second virtual image is detected. If the imaging distance increases, the value of the double image of the first virtual image and the second virtual image that are projected to the same side of the windshield through the projection group is lowered. According to the invention, by reasonably adjusting the astigmatism of an optical system, meridian plane imaging relative to human eyesight is greater than sagittal surface imaging, which can further weaken the phenomenon of double images. By increasing imaging distance and reasonably adjusting astigmatism, the phenomenon of double images can be also weakened. Therefore, either way or the combination of two ways can be conducive to the weakening of the phenomenon of double images.

Description

technical field [0001] The invention relates to the field of automobile head-up display, in particular to a windshield type head-up display device and a method for weakening ghost images. Background technique [0002] In order to facilitate the driver to view vehicle information, navigation information, etc., the head-up display (HUD, Head Up Display) is used to optically project image information near the driver's line of sight. [0003] When the HUD projects images, it is reflected by the windshield and enters the eye box area for the driver to watch. At the same time, the driver can see the road conditions through the windshield. Therefore, because the windshield has both reflective and light-transmitting properties, both surfaces will reflect the HUD projected image, thereby forming two non-overlapping images, which is not conducive to the driver's viewing, such as figure 1 Shown is a typical windshield ghosting diagram. Usually we call one of the images the main imag...

Claims

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Application Information

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IPC IPC(8): G02B27/01
CPCG02B27/0101G02B2027/0121G02B2027/011B60K35/00B60K2370/1529
Inventor 马斌斌
Owner SUZHOU CARROBOT AUTOMOTIVE ELECTRONICS TECH CO LTD
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