CN107907999B - Augmented reality head-up display device and ghost elimination method - Google Patents
Augmented reality head-up display device and ghost elimination method Download PDFInfo
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- CN107907999B CN107907999B CN201711175806.4A CN201711175806A CN107907999B CN 107907999 B CN107907999 B CN 107907999B CN 201711175806 A CN201711175806 A CN 201711175806A CN 107907999 B CN107907999 B CN 107907999B
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- 230000003190 augmentative effect Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008030 elimination Effects 0.000 title claims abstract description 12
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 12
- 201000009310 astigmatism Diseases 0.000 claims abstract description 22
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000003384 imaging method Methods 0.000 description 16
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 15
- 230000004438 eyesight Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 206010020675 Hypermetropia Diseases 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000004305 hyperopia Effects 0.000 description 1
- 201000006318 hyperopia Diseases 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 208000001491 myopia Diseases 0.000 description 1
- 230000004379 myopia Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
- G02B2027/012—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility comprising devices for attenuating parasitic image effects
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Abstract
The application discloses an augmented reality head-up display device and a ghost elimination method. The device comprises: the display module is used for generating a first image source and a second image source; the reflecting mirror group is used for reflecting the first image source to a windshield to form a first image; the reflecting mirror group is also used for reflecting the second image source to the windshield to form a second image; the first image and the second image formed by the reflector group meet the following preset conditions: judging whether projection distances of the meridian image of the first image and the meridian image of the second image are equal; and if the projection distances of the meridian images of the first image and the second image are equal, adjusting the absolute values of astigmatism of the first image and the second image. The application solves the technical problem that double images cannot be eliminated at the same time in the windshield type head-up display device.
Description
Technical Field
The application relates to the field of automobile head-up display, in particular to an augmented reality head-up display device and a ghost elimination method.
Background
The augmented reality Head-Up Display device (English full name: augmented Reality-Head Up Display, AR-HUD for short) displays information such as vehicle speed, vehicle condition and the like displayed by the traditional Head-Up Display device through overlapping of the projected image and an actual road surface.
Two images projected at the present stage, one image is an image with a projection distance of about 7 meters, and the two images overlap with the actual environment, and are called: an augmented reality image; the other image is an image with a projection distance of about 2 meters, and displays the information of the speed and the condition of the vehicle, which is called: vehicle status image.
In a windscreen type head-up display device, the ghost image eliminating method is usually to customize a windscreen, wherein a polyvinyl butyral (Polyvinyl Butyral, abbreviated as PVB) interlayer in the windscreen is provided with wedge angles so that the inner surface and the outer surface of the windscreen are not parallel. The inventors have found that the angular size of the wedge angle of the polyvinyl butyral is related to the parameters of the head-up display, the projection distance. Therefore, for the two images of the different projection distances, ghost cannot be eliminated at the same time. In particular, the larger the difference in the projection distances of the two images, the more serious the ghost.
Aiming at the problem that double images cannot be eliminated simultaneously in the related art, no effective solution is proposed at present.
Disclosure of Invention
The application mainly aims to provide an augmented reality head-up display device, which is used for solving the problem that double images cannot be eliminated simultaneously in the related art.
In order to achieve the above object, according to one aspect of the present application, there is provided an augmented reality head-up display device.
An augmented reality head-up display device, comprising: the display module is used for generating a first image source and a second image source; the reflecting mirror group is used for reflecting the first image source to a windshield to form a first image; the reflecting mirror group is also used for reflecting the second image source to the windshield to form a second image; the first image and the second image formed by the reflector group meet the following preset conditions: judging whether projection distances of the meridian image of the first image and the meridian image of the second image are equal; adjusting absolute values of astigmatism of the first image and the second image if projection distances of the meridian images of the first image and the second image are equal; wherein the range of absolute values of astigmatism of the first image and the second image is: between 0D and 1.5D.
Further, the mirror group includes: and the first reflecting mirror is used for sharing a reflecting surface as an optical path of the first image and the second image.
Further, the wedge angle is matched with the built-in wedge angle of the windshield.
Further, the first image and the second image formed by the reflecting mirror group meet the following preset conditions and further include any one or more of the following: the sagittal plane image imaging distance of the first image is more than or equal to 4m; the first image is used for displaying an augmented reality image; a sagittal image imaging distance of 1m to 5m of the second image; wherein the second image is used for displaying vehicle state information.
Further, the absolute value of astigmatism of the first image and the second image is less than or equal to 1.5D.
Further, the mirror group includes: the first reflecting mirror is a curved mirror, and the second reflecting mirror and the third reflecting mirror are plane mirrors or curved mirrors.
In order to achieve the above object, according to another aspect of the present application, there is provided a method of a ghost elimination method. A method of ghost elimination for an augmented reality head-up display device, the method comprising: judging whether projection distances of the meridian image of the first image and the meridian image of the second image are equal; adjusting absolute values of astigmatism of the first image and the second image if projection distances of the meridian images of the first image and the second image are equal; the augmented reality head-up display device includes: the display module is used for generating a first image source and a second image source; the reflecting mirror group is used for reflecting the first image source to a windshield to form a first image; the mirror group is also used for reflecting the second image source to the windshield to form a second image.
Further, the range of the absolute values of astigmatism of the first image and the second image is: between 0D and 1.5D.
Further, the meridian image view of the first image is less than the sagittal image view.
Further, the meridian image visibility of the second image is greater than the sagittal image visibility.
In the embodiment of the application, the method that the projection distances of the meridian image of the first image and the meridian image of the second image are equal (not absolutely equal) is adopted, and the purpose of eliminating double images simultaneously is achieved by adjusting the absolute values of astigmatism of the first image and the second image, so that the technical effect of imaging the augmented reality image and the vehicle state image is achieved, and the technical problem that double images cannot be eliminated simultaneously is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this specification. The drawings and their description are illustrative of the application and are not to be construed as unduly limiting the application. In the drawings:
FIG. 1 is a schematic diagram of a related art method for simultaneously eliminating ghost images;
FIG. 2 is a schematic diagram of an augmented reality head-up display device according to an embodiment of the application;
fig. 3 is a schematic diagram of an augmented reality head-up display method according to an embodiment of the application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Noun meaning in the present application:
ghost: the inner surface and the outer surface of the windshield can reflect the projected image of the head-up display device, so that two non-overlapping images are formed. The offset of the two images in the vertical direction is the ghost distance in units of distance values, such as mm. The angle of this ghost with respect to the human eye is defined as the ghost value, and the larger the angle of the ghost, the more easily the human eye can perceive.
Visibility: the visual optical instrument can be adapted to various people with different vision, so that the formed image is not located at infinity but at a certain distance in front of or behind the eyes to adapt to the needs of myopia or hyperopia, the unit is diopter, and the symbol D indicates. Expressed as the inverse of the distance, e.g., imaging is at infinity, visibility 0D; imaging is positioned in front of the eyes of a person by 1m, and the vision is-1D; is positioned in front of the eyes by 4m and has a vision of-0.25D.
Projection distance: the distance from the human eye to the head-up display device to display the virtual image.
Astigmatism: one point is imaged by an optical system, the meridian plane image and the sagittal plane image are not coincident, and the distance between the meridian plane image and the sagittal plane image is called astigmatism.
PVB windshield with wedge angle: the prior passenger car windshield consists of an inner windshield, an outer windshield and PVB, wherein the PVB is a layer of transparent film and is positioned between the inner and outer windshields, so that the safety and the sound insulation property of the windshield are improved. The conventional PVB film is a uniform thickness film. PVB (polyvinyl butyral) windshields with wedge angles adopt PVB films with unequal thicknesses, so that a wedge angle is formed between the inner layer glass and the outer layer glass of the windshields, and the lower part of the PVB film is thin and the upper part of the PVB film is thick. The inner and outer surfaces of the windshield are non-parallel for eliminating double images of the head-up display device.
FIG. 1 is a schematic diagram of a related art method for simultaneously eliminating ghost images; the reflection principle known to optical personnel is utilized, the reflecting mirror rotates by an angle A, and the emergent ray rotates by an angle 2A. Therefore, two images of different imaging distances cannot be simultaneously ghost-eliminated. The device in the embodiment can solve the problem of ghost elimination and can effectively solve the problem of ghost images of two images in the augmented reality head-up display device. A windshield 6, an eyebox area 7. A first image primary image 81, a first image secondary image 82, a second image primary image 92, and a second image secondary image 91.
FIG. 2 is a schematic diagram of an augmented reality head-up display device according to an embodiment of the application; also include: meridian plane image location. An augmented reality head-up display device 100 in the present embodiment includes: the display module is used for generating a first image source and a second image source; the reflecting mirror group is used for reflecting the first image source to a windshield to form a first image; the reflecting mirror group is also used for reflecting the second image source to the windshield to form a second image; the first image and the second image formed by the reflector group meet the following preset conditions: judging whether projection distances of the meridian image of the first image and the meridian image of the second image are equal; adjusting absolute values of astigmatism of the first image and the second image if projection distances of the meridian images of the first image and the second image are equal; wherein the range of absolute values of astigmatism of the first image and the second image is: between 0D and 1.5D.
Specifically, the augmented reality head-up display device projects two images, wherein the augmented reality image with a far projection distance is a first image, and the vehicle state image with a near projection distance is a second image. The augmented reality head-up display device is matched with a wedge angle arranged in a windshield, so that the function of projecting two images can be realized.
Determining whether the projection distances of the meridian image of the first image and the meridian image of the second image are equal means that the projection distances of the meridian images of the first image and the second image are equal, or basically consistent, or have small difference. In this case, a PVB windshield with a wedge angle can be used, and the double image can be removed.
As a preferable example in this embodiment, as shown in fig. 2, the mirror group includes: a first mirror 3, wherein the first mirror 3 is used for sharing a reflecting surface as an optical path of the first image and the second image.
For example, it is preferable that two image light paths of the head-up display device provided by the application share one large reflector.
As a preferable aspect of the present embodiment, the first image and the second image formed by the mirror group satisfy the following preset conditions, and further include any one or more of the following: the sagittal plane image imaging distance of the first image is more than or equal to 4m; the first image is used for displaying an augmented reality image; alternatively, the sagittal image imaging distance of the second image is 1m to 5m; wherein the second image is used for displaying vehicle state information.
The absolute value of astigmatism of the first image and the second image in the embodiment of the application is less than or equal to 1.5D.
For example, the imaging distance of the sagittal image of the first image is more than or equal to 4m, and the sagittal image of the first image is used for displaying the augmented reality image and enhancing the external environment. Preferably, the sagittal image imaging distance is 7.5m.
For example, the second image sagittal image imaging distance is 1m to 5m for displaying the vehicle state information. Preferably, the sagittal image imaging distance is 2m.
Preferably, the first image and the second image meridian plane images are imaged at a distance of 3.15m.
In the first image and the second image in the embodiment of the application, the visibility difference between the meridian plane image and the sagittal plane image is 0.18D less than or equal to 1.5D. If there is a large astigmatism, it is liable to cause discomfort to the driver, and preferably, the visibility difference=0.25d.
As shown in fig. 2, the mirror group includes: the first reflecting mirror 3, the second reflecting mirror 4 and the third reflecting mirror 5, wherein the first reflecting mirror 3 is a curved mirror, and the second reflecting mirror 4 and the third reflecting mirror 5 are plane mirrors or curved mirrors. Specifically, a first reflecting mirror 3, a second reflecting mirror 4 and a third reflecting mirror 5 are arranged in the shell of the head-up display device, and a first display module 1 and a second display module 2 are arranged in the shell. A first image primary image 81, a first image secondary image 82, a second image primary image 92, and a second image secondary image 91.
The display module may be an image generating module such as LCD, OLED, LCOS, DLP and a necessary backlight illumination portion for generating an image source. The first display module emits light, and the light is reflected to the windshield through the second reflecting mirror and the first reflecting mirror in sequence to form a first image. The second display module emits light, and the light is reflected to the windshield through the third reflector and the first reflector in sequence to form a second image. In this way, the first image is located above the second image in the field of view along the driver. The meridian image imaging distances of the first image and the second image are substantially identical to ensure that the glass with a specific wedge angle PVB is capable of simultaneously attenuating ghosts.
The first reflecting mirror is a curved mirror, and the second reflecting mirror and the third reflecting mirror are plane mirrors or curved mirrors.
When the third reflecting mirror is a plane mirror, the function of folding the light path and compressing the HUD volume is achieved, and when the space volume is satisfied, the third reflecting mirror can be directly removed.
From the above description, it can be seen that the following technical effects are achieved:
by adopting the mode that the projection distances of the meridian image of the first image and the projection distances of the meridian image of the second image are equal (not absolute equal), the aim of eliminating double images simultaneously is fulfilled by adjusting the absolute values of astigmatism of the first image and the second image, so that the technical effect of imaging the augmented reality image and the vehicle state image is realized, and the technical problem that double images cannot be eliminated simultaneously is solved.
According to an embodiment of the present application, there is also provided a ghost elimination method for implementing the above-mentioned augmented reality head-up display device, as shown in fig. 3, the method including:
step S102, judging whether the projection distances of the meridian image of the first image and the meridian image of the second image are equal;
step S104, if the projection distances of the meridian images of the first image and the second image are equal, adjusting the absolute values of astigmatism of the first image and the second image;
the augmented reality head-up display device includes: the display module is used for generating a first image source and a second image source; the reflecting mirror group is used for reflecting the first image source to a windshield to form a first image; the mirror group is also used for reflecting the second image source to the windshield to form a second image.
Preferably, the range of absolute values of astigmatism of the first image and the second image is: between 0D and 1.5D. At least one of the first image and the second image has larger astigmatism, and the absolute value is more than or equal to 0.05D. Judging whether the projection distances of the meridian images of the first image and the second image are equal, and if the projection distances of the meridian images of the first image and the second image are equal, adjusting the absolute values of astigmatism of the first image and the second image. The absolute value of astigmatism of the first image and the second image is less than or equal to 1.5D, and if the astigmatism is too large, the driver is easy to feel uncomfortable after long-time driving.
Preferably, the meridian image visibility of the first image is smaller than the sagittal image visibility. The first image meridian image vision is less than the sagittal image vision. For example, when the image is located in the range of 2m to infinity in front of the human eye, the meridian plane image is close to the human eye and the sagittal plane image is far from the human eye. Along the eye's line of sight, the meridian plane image is located between the eye and the sagittal plane image.
Preferably, the meridian image visibility of the second image is greater than the sagittal image visibility. The second image meridian image vision is greater than the sagittal image vision. For example, when the image is located in front of the human eye, the meridian image is far from the human eye and the sagittal image is near the human eye. Along the eye's line of sight, the sagittal image is located between the eye and the meridional image.
Specifically, the first image sagittal plane image is located in front of the human eye by 10m, the vision degree is-0.1, the meridian plane image is located in front of the human eye by 4m, the vision degree is-0.25, -0.25< -0.1.
Specifically, the sagittal plane image of the second image is positioned 2m in front of the human eye, and the vision is-0.5; the meridian image is located 4m in front of human eyes, and the vision is-0.25, -0.25> -0.5.
In some embodiments, image one and image two are arranged in a vertical direction, preferably image one is located above image two.
In some embodiments, at least one of the first and second images has a larger astigmatism, and the absolute value is greater than or equal to 0.05D.
In some embodiments, the first and second images, the meridian image imaging distance is substantially uniform. In a specific operation, the meridian image distances are not absolutely equal, and if there is a very small difference, the imaging effect is better.
It will be apparent to those skilled in the art that the modules or steps of the application described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, or they may alternatively be implemented in program code executable by computing devices, such that they may be stored in a memory device for execution by the computing devices, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps within them may be fabricated into a single integrated circuit module. Thus, the present application is not limited to any specific combination of hardware and software.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (4)
1. A method of ghost elimination for an augmented reality head-up display device, the method comprising:
judging whether projection distances of the meridian image of the first image and the meridian image of the second image are equal;
adjusting absolute values of astigmatism of the first image and the second image if projection distances of the meridian images of the first image and the second image are equal;
the augmented reality head-up display device includes: the display module is used for generating a first image source and a second image source; the reflecting mirror group is used for reflecting the first image source to a windshield to form a first image; the reflecting mirror group is also used for reflecting the second image source to the windshield to form a second image;
the mirror group includes: a first mirror for sharing a reflection surface as an optical path of the first image and the second image;
the wedge angle is matched with the wedge angle arranged in the windshield;
the mirror group includes: the first reflecting mirror is a curved mirror, and the second reflecting mirror and the third reflecting mirror are plane mirrors or curved mirrors.
2. The method of ghost elimination method according to claim 1, wherein the range of astigmatic absolute values of said first image and said second image is: between 0D and 1.5D.
3. The method of ghost elimination according to claim 1, wherein said first image has a meridian image view less than a sagittal image view.
4. The method of ghost elimination according to claim 1, wherein said second image has a meridian image visibility greater than a sagittal image visibility.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711175806.4A CN107907999B (en) | 2017-11-22 | 2017-11-22 | Augmented reality head-up display device and ghost elimination method |
| PCT/CN2017/119164 WO2019100518A1 (en) | 2017-11-22 | 2017-12-28 | Augmented reality head-up display device and double-image elimination method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711175806.4A CN107907999B (en) | 2017-11-22 | 2017-11-22 | Augmented reality head-up display device and ghost elimination method |
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| CN107907999A CN107907999A (en) | 2018-04-13 |
| CN107907999B true CN107907999B (en) | 2023-11-03 |
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| WO (1) | WO2019100518A1 (en) |
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| CN108955714A (en) * | 2018-04-28 | 2018-12-07 | 苏州车萝卜汽车电子科技有限公司 | Method for processing navigation information and device, virtual reality head-up display device |
| CN108983423A (en) * | 2018-07-26 | 2018-12-11 | 京东方科技集团股份有限公司 | A kind of Binocular displays system and vehicle-mounted head-up-display system |
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| WO2019100518A1 (en) | 2019-05-31 |
| CN107907999A (en) | 2018-04-13 |
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