WO2019100518A1

WO2019100518A1 - Augmented reality head-up display device and double-image elimination method

Info

Publication number: WO2019100518A1
Application number: PCT/CN2017/119164
Authority: WO
Inventors: 马斌斌
Original assignee: 苏州车萝卜汽车电子科技有限公司
Priority date: 2017-11-22
Filing date: 2017-12-28
Publication date: 2019-05-31
Also published as: CN107907999A; CN107907999B

Abstract

An augmented reality head-up display device and a double-image elimination method. The device comprises a reflector group and a display module. The display module is used to generate a first image source and a second image source. The reflector group is used to reflect the first image source onto a windshield to form a first image and to reflect the second image source onto the windshield to form a second image. The first image and the second image formed by the reflector group meet the following preset conditions: determining whether a projection distance of a meridional image of the first image and that of a meridional image of the second image are equal (S102); and adjusting the astigmatic aberration absolute values of the first image and the second image if the projection distances are equal (S104). The invention solves the technical problem that double images on a windshield head-up display device cannot be eliminated.

Description

Augmented reality head-up display device and method for eliminating ghosting

This application claims priority to Chinese Patent Application No. 2017-11758064, entitled "Augmented Reality Head-Up Display Device and De-Ghosting Method" on November 22, 2017, the entire contents of which are incorporated by reference. In this application.

Technical field

The present application relates to the field of automobile head-up display, and in particular to an augmented reality head-up display device and a ghost-removing method.

Background technique

Augmented Reality-Head Up Display (AR-HUD), which overlaps the actual road surface through the projected image, and displays the information such as the speed and condition of the traditional head-up display.

The two images projected at the current stage, one image is an image with a projection distance of about 7 meters, overlapping with the actual environment, called: augmented reality image; the other image is an image with a projection distance of about 2 meters, showing the speed and condition information. , called: vehicle status image.

In the windshield head-up display device, the method of eliminating ghosting is usually a custom windshield, and the polyvinyl butyral (English name Polyvinyl Butyral, PVB for short) inside the windshield has a wedge angle, so that the windshield inside and outside the windshield The surfaces are not parallel. The inventors have found that the angular extent of the polyvinyl butyral wedge angle is related to the parameters and projection distance of the head-up display. Therefore, for the two images of the different projection distances described above, the ghost cannot be eliminated at the same time. In particular, the greater the difference in projection distance between the two images, the more severe the ghosting.

In view of the problem that the ghosting cannot be eliminated at the same time in the related art, an effective solution has not been proposed yet.

Application content

The main purpose of the present application is to provide an augmented reality head-up display device to solve the problem that the ghosting cannot be simultaneously eliminated in the related art.

In order to achieve the above object, according to an aspect of the present application, an augmented reality head-up display device is provided.

An augmented reality head-up display device comprising: a mirror group and a display module, the display module for generating a first image source and a second image source; the mirror group for using the first The image source is reflected to the windshield to form a first image; the mirror set is further configured to reflect the second image source to the windshield to form a second image; the first shape formed by the mirror The image and the second image satisfy a preset condition of determining whether a projection distance of the meridional image of the first image and the meridional image of the second image is equal; if the meridional image of the first image and the second image are The projection distances of the meridional images are equal, and the astigmatism absolute values of the first image and the second image are adjusted; wherein the astigmatism absolute values of the first image and the second image are in the range of: 0D to Between 1.5D.

Further, the mirror group includes: a first mirror for sharing a reflection surface as an optical path of the first image and the second image.

Further, it cooperates with the wedge angle built in the windshield.

Further, the first image and the second image that are formed by the mirror satisfy the following preset conditions, and further include any one or more of the following: a sagittal image imaging distance of the first image ≥ 4m; wherein the first image is for displaying an augmented reality image; the sagittal image of the second image is imaged by a distance of 1 m to 5 m; wherein the second image is for displaying vehicle state information.

Further, the first image and the second image astigmatism absolute value ≤ 1.5D.

Further, the mirror group includes: a first mirror, a second mirror, and a third mirror, wherein the first mirror is a curved mirror, and the second mirror and the third mirror are plane mirrors or curved surfaces mirror.

In order to achieve the above object, according to another aspect of the present application, a method of deghosting method is provided. A method for eliminating ghosting, for augmented reality head-up display device, the method comprising: determining whether a projection distance of a meridional image of the first image and a meridional image of the second image is equal; if the first image The projection distances of the meridional image of the second image and the meridional image of the second image are equal, and the absolute values of the astigmatism of the first image and the second image are adjusted; the augmented reality head-up display device comprises: a mirror group and a display module The display module is configured to generate a first image source and a second image source; the mirror group is configured to reflect the first image source to a windshield to form a first image; the mirror group And for reflecting the second image source to the windshield to form a second image.

Further, the astigmatism absolute values of the first image and the second image range from 0D to 1.5D.

Further, the meridional image of the first image is less than the sagittal image.

Further, the meridional image of the second image is greater than the sagittal image.

In the embodiment of the present application, the astigmatism of the first image and the second image is absolutely adjusted by using the manner that the projection distances of the meridional image of the first image and the meridional image of the second image are equal (not absolutely equal). The value achieves the purpose of eliminating ghosting at the same time, thereby realizing the technical effect of imaging the augmented reality image and the vehicle state image, thereby solving the technical problem that the ghost image cannot be simultaneously eliminated.

DRAWINGS

Other features, objects, and advantages of the present application will become apparent from the accompanying drawings. The drawings and the description of the exemplary embodiments of the present application are intended to explain the present application and do not constitute an undue limitation of the present application. In the drawing:

1 is a schematic diagram of a ghost that cannot be simultaneously eliminated according to the related art;

2 is a schematic diagram of an augmented reality head-up display device according to an embodiment of the present application;

FIG. 3 is a schematic diagram of augmented reality head display method according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application. Some embodiments are applied, not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "medium", The orientation or positional relationship of the indications "vertical", "horizontal", "transverse", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are primarily intended to describe the present application and its embodiments, and are not intended to limit the scope,

Moreover, the above partial terms may be used to indicate other meanings in addition to the orientation or positional relationship, for example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meaning of these terms in this application can be understood on a case-by-case basis.

In addition, the terms "installation," "set," "set," "connected," "connected," and "socketed" are to be understood broadly. For example, it may be a fixed connection, a detachable connection, or a one-piece construction; it may be a mechanical connection, or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, or it may be two devices, components or components. Internal communication. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood on a case-by-case basis.

It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings.

The meaning of the nouns in this application:

Ghosting: Both the inner and outer surfaces of the windshield reflect the projected image of the head-up display device, thereby forming two non-overlapping images. The offset of the two images in the vertical direction is the ghost distance, and the unit is the distance value, such as mm. The angle of the ghost relative to the human eye is defined as the ghost value, and the larger the opening angle, the easier the human eye can detect.

Vision: Visual optical instruments can be used by people with different visions, so that the image is no longer infinity, but at a certain distance in front of or behind the human eye to meet the needs of myopia or hyperopia. The unit is diopter and the symbol D is indicated. It is represented by the reciprocal of the distance, for example, the imaging is at infinity, the visual acuity is 0D; the imaging is located 1m in front of the human eye, the visual acuity is -1D; it is located 4m in front of the human eye, and the visual acuity is -0.25D.

Projection distance: The distance from the human eye to the head-up display device to display the virtual image.

Astigmatism: The image is imaged by the optical system. The meridional image does not coincide with the sagittal image. The distance between the two is called astigmatism.

PVB windshield with wedge angle: At present, the windshield of passenger car is composed of inner windshield, outer windshield and PVB. PVB is a transparent diaphragm located between the inner and outer glass to improve the windshield. Safety and sound insulation. The conventional PVB diaphragm is a layer of equal thickness diaphragm. With a wedge-shaped PVB windshield, the PVB diaphragm with unequal thickness is used, so that there is a wedge angle between the inner and outer glass of the windshield, which is thin and thick. The inner and outer surfaces of the windshield are not parallel and are used to eliminate ghosting of the head-up display device.

1 is a schematic diagram of a ghost that cannot be simultaneously eliminated according to the related art; using a reflection principle well known to an optical person, a mirror rotation angle A, and an exiting light rotation angle 2A. Therefore, two images with different imaging distances cannot eliminate ghosting at the same time. The device in this embodiment can effectively solve the two image ghosts in the augmented reality head-up display device for eliminating the ghost problem. Windshield 6, eye box area 7. The first image main image 81, the first image sub-image 82, the second image main image 92, and the second image sub-image 91.

2 is a schematic diagram of an augmented reality head-up display device according to an embodiment of the present application; further comprising: a meridional image position. The augmented reality head-up display device 100 of the embodiment includes: a mirror group and a display module, wherein the display module is configured to generate a first image source and a second image source; Reflecting the first image source to the windshield to form a first image; the mirror group is further configured to reflect the second image source to the windshield to form a second image; The first image and the second image satisfy a preset condition of determining whether a projection distance of a meridional image of the first image and a meridional image of the second image are equal; if the meridional of the first image Adjusting the astigmatism absolute values of the first image and the second image by equalizing the projection distances of the image and the meridional image of the second image; wherein the astigmatism absolute values of the first image and the second image The range is between 0D and 1.5D.

Specifically, the augmented reality head-up display device in the present application projects two images, the augmented reality image of the far projection distance is the first image, and the vehicle state image of the near projection distance is the second image. The augmented reality head-up display unit is used in conjunction with the wedge angle built into the windshield to project the two images.

Determining whether the projection distances of the meridional image of the first image and the meridional image of the second image are equal means that the meridional images of the first image and the second image are equal in projection distance, or substantially identical, or the difference is small. At this point, you can use the PVB windshield with wedge angle to eliminate the ghosting of the two images.

As a preferred embodiment of the present invention, as shown in FIG. 2, the mirror group includes: a first mirror 3 for use as an optical path of the first image and the second image Share the reflective surface.

For example, preferably, the two image light paths of the head-up display device proposed by the present invention share one of the large mirrors.

As a preferred embodiment of the present invention, the first image and the second image that are formed by the mirror satisfy the following preset conditions, and further include any one or more of the following: The sagittal image imaging distance is ≥ 4 m; wherein the first image is used to display an augmented reality image; or the sagittal image of the second image is imaged at a distance of 1 m to 5 m; wherein the second image is used for Display vehicle status information.

The first image and the second image astigmatism absolute value in the embodiment of the present application are ≤1.5D.

For example, the first image sagittal plane image imaging distance ≥ 4m is used to display an augmented reality image, enhancing the display of the external environment. Preferably, the sagittal image is imaged at a distance of 7.5 m.

For example, the second image sagittal image is imaged at a distance of 1 m to 5 m for displaying vehicle state information. Preferably, the sagittal image is imaged at a distance of 2 m.

Preferably, the first image and the second image meridional image are imaged at a distance of 3.15 m.

In the first image and the second image in the embodiment of the present application, the meridional image and the sagittal image have a difference of 0.18D≤1.5D. If there is a large astigmatism, it is easy to cause driver discomfort, and preferably, the difference in visibility is 0.25D.

As shown in FIG. 2, the mirror group includes: a first mirror 3, a second mirror 4, and a third mirror 5, the first mirror 3 is a curved mirror, and the second mirror 4, The third mirror 5 is a plane mirror or a curved mirror. Specifically, the first mirror 3, the second mirror 4, and the third mirror 5, the first display module 1 and the second display module 2 are disposed in the head display device housing. The first image main image 81, the first image sub-image 82, the second image main image 92, and the second image sub-image 91.

The above display module may specifically be an image generating module such as an LCD, an OLED, an LCOS, or a DLP, and a necessary backlighting portion for generating an image source. The first display module emits light, which is sequentially reflected by the anti-second mirror and the first mirror to the windshield to form a first image. The second display module emits light, and is sequentially reflected by the third mirror and the first mirror to the windshield to form a second image. In this way, the first image is located above the second image as viewed along the driver's field of view. The imaging distances of the meridional images of the first image and the second image are substantially identical to ensure that the glass with a specific wedge angle PVB can simultaneously attenuate the ghost.

The first mirror is a curved mirror, and the second mirror and the third mirror are a plane mirror or a curved mirror.

When the third mirror is a plane mirror, it functions to fold the optical path and compress the volume of the HUD. When the space volume is satisfied, the mirror 3 can be directly removed.

From the above description, it can be seen that the present invention achieves the following technical effects:

By adjusting the absolute values of the astigmatism of the first image and the second image in such a manner that the projection distances of the meridional image of the first image and the meridional image of the second image are equal (not absolutely equal), simultaneous elimination is achieved. The purpose of the image is to realize the technical effect of imaging the augmented reality image and the vehicle state image, thereby solving the technical problem that the ghost image cannot be eliminated at the same time.

According to an embodiment of the present invention, a method for implementing the above-described augmented reality head-up display device is provided. As shown in FIG. 3, the method includes:

Step S102, determining whether the projection distances of the meridional image of the first image and the meridional image of the second image are equal;

Step S104, if the projection distances of the meridional image of the first image and the meridional image of the second image are equal, adjusting an astigmatic absolute value of the first image and the second image;

The augmented reality head-up display device includes: a mirror group and a display module, the display module is configured to generate a first image source and a second image source; the mirror group is configured to use the first image The source is reflected to the windshield to form a first image; the mirror set is further configured to reflect the second image source to the windshield to form a second image.

Preferably, the astigmatism absolute values of the first image and the second image range from 0D to 1.5D. At least one of the first image and the second image has a large astigmatism, and the absolute value is ≥0.05D. Determining whether the projection distances of the meridional image of the first image and the meridional image of the second image are equal, and if the projection distances of the meridional image of the first image and the meridional image of the second image are equal, adjusting the first image And an absolute value of the astigmatism of the second image. The absolute value of the first image and the second image astigmatism is ≤1.5D. If there is excessive astigmatism, driving for a long time may cause eye discomfort of the driver.

Preferably, the meridional image of the first image is less than the sagittal image. The first image meridional image is less than the sagittal image. For example, when the image is located in the range of 2m to infinity in front of the human eye, the image of the meridian plane is close to the human eye, and the image of the sagittal plane is far from the human eye. The meridional image is located between the human eye and the sagittal image along the line of sight of the human eye.

Preferably, the meridional image of the second image is greater than the sagittal image. The second image meridional image has a larger apparent power than the sagittal image. For example, when the image is in front of the human eye, the meridian image is far from the human eye, and the sagittal image is closer to the human eye. The sagittal image is located between the human eye and the meridian image along the line of sight of the human eye.

Specifically, the first image sagittal plane image is located 10 m in front of the human eye, the dioptric power is -0.1, and the meridional image is located 4 m in front of the human eye, and the visual acuity is -0.25, -0.25 < -0.1.

Specifically, the second image sagittal plane image is located 2m in front of the human eye, and the dioptricity is -0.5; the meridional image is located 4m in front of the human eye, and the dioptricity is -0.25, -0.25>-0.5.

In some embodiments, image one is aligned with image two in a vertical direction, preferably image one is above image two.

In some embodiments, at least one image of image one and image two has a large astigmatism with an absolute value of ≥ 0.05D.

In some embodiments, image one and image two, the meridional image imaging distances are substantially identical. In the specific operation, the meridian image distance is not absolutely equal, if there is a very small difference, the imaging effect will be better.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in a storage device by a computing device, or they may be fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present application, and is not intended to limit the present application, and various changes and modifications may be made to the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application are intended to be included within the scope of the present application.

Claims

An augmented reality head-up display device, comprising: a mirror group and a display module, wherein the display module is configured to generate a first image source and a second image source; The first image source is reflected to the windshield to form a first image; the mirror group is further configured to reflect the second image source to the windshield to form a second image; The first image and the second image satisfy the following preset conditions:

Determining whether the projection distances of the meridional image of the first image and the meridional image of the second image are equal;

Adjusting an astigmatic absolute value of the first image and the second image if a projection distance of the meridional image of the first image and the meridional image of the second image are equal;

The absolute value of the astigmatism of the first image and the second image ranges from 0D to 1.5D.
The augmented reality head-up display device according to claim 1, wherein the mirror group comprises: a first mirror,

The first mirror is configured to share a reflective surface as an optical path of the first image and the second image.
The augmented reality head-up display device according to claim 1, wherein the wedge angle is integrated with a wedge angle built in the windshield.
The augmented reality head-up display device according to claim 1, wherein the first image and the second image that are formed by the mirror satisfy the following preset conditions, and further include any one of the following or Multiple:

The sagittal image of the first image is imaged by a distance ≥ 4 m; wherein the first image is used to display an augmented reality image;

The sagittal image of the second image is imaged at a distance of 1 m to 5 m; wherein the second image is used to display vehicle state information.
The augmented reality head-up display device according to claim 1, wherein the first image and the second image astigmatism absolute value ≤ 1.5D.
The augmented reality head-up display device according to claim 1, wherein the mirror group comprises: a first mirror, a second mirror and a third mirror, wherein the first mirror is a curved mirror, The second mirror and the third mirror are plane mirrors or curved mirrors.
A method for eliminating ghosting, characterized in that it is used for an augmented reality head-up display device, the method comprising:

Determining whether the projection distances of the meridional image of the first image and the meridional image of the second image are equal;

Adjusting an astigmatic absolute value of the first image and the second image if a projection distance of the meridional image of the first image and the meridional image of the second image are equal;

The strong reality head-up display device includes: a mirror group and a display module, the display module is configured to generate a first image source and a second image source; the mirror group is configured to use the first image The source is reflected to the windshield to form a first image; the mirror set is further configured to reflect the second image source to the windshield to form a second image.
The method according to claim 7, wherein the astigmatism absolute values of the first image and the second image are in a range from 0D to 1.5D.
The method according to claim 7, wherein the meridional image of the first image is less than the sagittal image.
The method of claim 7, wherein the meridional image of the second image is greater than the sagittal image.