CN114035324B - HUD light path projection system and HUD light path projection method - Google Patents
HUD light path projection system and HUD light path projection method Download PDFInfo
- Publication number
- CN114035324B CN114035324B CN202111291485.0A CN202111291485A CN114035324B CN 114035324 B CN114035324 B CN 114035324B CN 202111291485 A CN202111291485 A CN 202111291485A CN 114035324 B CN114035324 B CN 114035324B
- Authority
- CN
- China
- Prior art keywords
- projection
- ctanα
- angle
- front windshield
- mirror
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Abstract
The application discloses a HUD light path projection system and a HUD light path projection method, which relate to the field of HUDs in the automobile industry, wherein the system comprises a projection generating device which is configured to generate projection; the projection device is configured to receive the projection and project the projection to the front windshield, and the sum of the incident angle and the reflection angle of the projection to the front windshield is an acute angle. The application ensures that a driver can watch and use the projection on any vehicle type, does not need to reduce the layout height of the HUD, can not interfere with CCB in the IP, has small layout image for the IP system which is measured currently, can adapt to the sitting position, azimuth and front wind shielding inclination angle of the driver, has larger range, wide application range and low adjustment and production cost.
Description
Technical Field
The application relates to the field of HUDs in the automobile industry, in particular to a HUD light path projection system and method.
Background
The head-up display is abbreviated as HUD, and is called as head-up display system, which refers to a multifunctional instrument panel with a driver as a center and with blind operation.
The effect of the device is that important driving information such as speed per hour, navigation and the like is projected onto a windshield glass in front of a driver, so that the driver can see the important driving information such as speed per hour, navigation and the like without lowering the head and turning the head as much as possible
The design taking the driver as the center is to make the driver more convenient to watch the vehicle-mounted screen and operate the knob when driving; blind operation is to keep the driver as little view as possible away from the front; the navigation information can be displayed on the multifunctional instrument panel so as to make the driver's attention as little as possible for watching navigation. In summary, the common purpose of these terms is to let the driver look right behind the right look at all times when driving, and look at the road conditions ahead.
As shown in fig. 1, the conventional HUD optical path system scheme: electronic information to be displayed is collected through OBD, light information is sent out through a projector, reflected to a projector through a reflecting mirror, and then reflected to a windshield through the reflecting mirror, and a human eye sees a virtual image located at the position 2-2.5 m in front of the eye. The "mirror" is disposed rearward and upward of the "projector", and the "projector" is disposed forward and upward of the "projector".
However, HUD projection is deficient. As shown in fig. 2, however, the conventional HUD line is designed based on the front windshield angle of the passenger car, and is not suitable for a commercial vehicle. The front windshield inclination angle of the passenger car is larger than that of a commercial car, and because the front windshield is generally curved glass, a 'projection mirror' needs to be designed into a free curved surface, and the existing HUD is directly applied, the defects are that the included angle between light reflected by the 'projection mirror' and the front windshield is reduced, so that the position of an image projected onto the front windshield is increased, and the visible height exceeds the visible height of the normal driving gesture of an oval eye of a driver, so that the driver cannot directly observe the vehicle.
1. If the arrangement height of the HUD is reduced, interference with the internal CCB of the IP is caused, the influence on the arrangement scheme of the existing vehicle IP system is large, the implementation scheme is difficult, and the cost is high.
2. The position of the "projector" reflected onto the front windscreen cannot fit the best viewing area of all drivers due to the different actual sitting postures.
Disclosure of Invention
Aiming at the defects in the prior art, the application aims to provide the HUD optical path projection system and the HUD optical path projection method, which can solve the problem that the eyes of a driver with a small inclination angle can not directly observe images, and the driver can observe the images very easily and conveniently.
To achieve the above object, in a first aspect, an embodiment of the present application provides a HUD optical path projection system, including:
a projection generating device configured to generate a projection;
the projection device is configured to receive the projection and project the projection to the front windshield, and the sum of the incident angle and the reflection angle of the projection to the front windshield is an acute angle.
On the basis of the technical scheme, the projection device comprises a reflecting mirror and a projection mirror, wherein the reflecting mirror is configured to receive the projection of the projection generation device and reflect the projection towards the direction of a viewer, and the projection mirror is configured to receive the reflected projection and project the projection to the front windshield.
On the basis of the technical scheme, the projection device further comprises a calculation module, wherein the calculation module is configured to calculate the projection position and adjust the projection device.
On the basis of the technical scheme, the system further comprises an eyepoint detection sub-module, a projection positioning sub-module, a calculation sub-module and an adjustment sub-module:
the eyepoint detection sub-module is configured to detect an eyeball position of a viewer;
the projection positioning sub-module is configured to position an optimal projection position according to the eyeball position;
the calculating submodule is configured to calculate a projection angle according to the optimal projection position;
the adjusting sub-module is configured to adjust the projection device to project forward at the projection angle.
On the basis of the above technical solution, the projection positioning sub-module is configured to position an optimal projection position according to the eyeball position, and includes:
the lower end point of the front windshield is used for constructing an (x, z) relative coordinate system for the coordinate origin (0, 0);
the eyeball position is (a, B), the lower eyeball line of sight and the front windshield are intersected at the point A, the upper eyeball line of sight and the front windshield are intersected at the point B, and the optimal observation area angle is within the range of 25 DEG upwards and 30 DEG downwards of the eyeball line of sight
The point A coordinates are ((b-0.577 a)/(ctanα -0.577), ctanα (b-0.577 a)/(ctanα -0.577));
the coordinates of the point B are as follows: ((b+0.466 a)/(ctanα+0.466), ctanα (b+0.466 a)/(ctanα+0.466));
thus, the optimal observation area range satisfies x ε [ (b-0.577a)/(ctanα -0.577), (b+0.466 a)/(ctanα+0.466) ],
and z epsilon [ ctanα (b-0.577a)/(ctanα -0.577), ctanα (b+0.466 a)/(ctanα+0.466) ],
wherein alpha is the front wind screen elevation inclination angle.
On the basis of the technical scheme, the projection device comprises a reflecting mirror and a projection mirror, wherein the reflecting mirror is configured to receive the projection of the projection generation device and reflect the projection towards the driver direction of a viewer, the projection mirror is configured to receive the reflected projection and project the projection to the front windshield, the front windshield elevation angle is alpha, the projection angle of the projector is beta, the elevation angle of the reflecting mirror is gamma, and the elevation angle of the projection mirror is delta, and then:
the included angle between the projection light path and the front wind is (90+alpha+2delta-2 gamma-beta), the intersection point (X, Y) X is between (b-0.577a)/(ctanα -0.577) and (b+0.466 a)/(ctanα+0.466), and Y is between ctanα (b-0.577a)/(ctanα -0.577) and ctanα (b+0.466 a)/(ctanα+0.466).
In a second aspect, an embodiment of the present application further provides a HUD optical path projection method, including:
configuring a projection generating device to generate projection;
the projection device is configured to receive a projection and project the projection toward the front windshield, the sum of the angle of incidence and the angle of reflection of the projection at the front windshield being an acute angle (the projection direction is directed away from the viewer/driver) (the projection direction is at an acute angle to the viewing direction).
On the basis of the technical scheme, the projection device comprises a reflecting mirror and a projection mirror, wherein the reflecting mirror is configured to receive the projection of the projection generation device and reflect the projection towards the driver direction of a viewer, and the projection mirror is configured to receive the reflected projection and project the projection to the front windshield.
On the basis of the technical scheme, before the front windshield projection, the method comprises the following steps:
detecting the eyeball position of a viewer;
positioning an optimal projection position according to the eyeball position;
calculating a projection angle according to the optimal projection position;
and adjusting the projection device to project forward in a windbreak way at the projection angle.
On the basis of the above technical solution, the positioning the optimal projection position according to the eyeball position includes:
the lower end point of the front windshield is used for constructing an (x, z) relative coordinate system for the coordinate origin (0, 0);
the eyeball position is (a, B), the lower eyeball line of sight and the front windshield are intersected at the point A, the upper eyeball line of sight and the front windshield are intersected at the point B, and the optimal observation area angle is within the range of 25 DEG upwards and 30 DEG downwards of the eyeball line of sight
The point A coordinates are ((b-0.577 a)/(ctanα -0.577), ctanα (b-0.577 a)/(ctanα -0.577));
the coordinates of the point B are as follows: ((b+0.466 a)/(ctanα+0.466), ctanα (b+0.466 a)/(ctanα+0.466));
thus, the optimal observation area range satisfies x ε [ (b-0.577a)/(ctanα -0.577), (b+0.466 a)/(ctanα+0.466) ],
and z epsilon [ ctanα (b-0.577a)/(ctanα -0.577), ctanα (b+0.466 a)/(ctanα+0.466) ],
wherein alpha is the front wind screen elevation inclination angle.
Compared with the prior art, the application has the advantages that:
the HUD light path projection system and the HUD light path projection method adjust the light path of the whole projection, so that the projection can be winded forward with a smaller incident angle during projection, the front windshields with different inclined angles on different vehicle types are faced, the projected images are basically kept in a proper range, the driver is ensured to watch and use the projection on any vehicle type, the HUD layout height is not required to be reduced, the interference with CCB in an IP is avoided, and the layout image of the IP system which is measured in the prior art is small.
Furthermore, the application can adapt to the sitting posture, azimuth and front wind shielding inclination angle of the driver, has larger range, wide application range and low adjustment and production cost.
Drawings
For a clearer description of the technical solutions of the embodiments of the present application, the following description will be given for a brief description of the drawings corresponding to the embodiments, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram of a prior art HUD optical path system;
FIG. 2 is a schematic diagram illustrating a disadvantage of the conventional HUD optical path system;
FIG. 3 is a schematic diagram of an embodiment of a HUD light path projection system according to the present application;
FIG. 4 is a schematic illustration of an embodiment of a HUD light path projection system according to the present application;
FIG. 5 is a flowchart illustrating steps of an embodiment of a HUD light path projection system according to the present application.
Detailed Description
Embodiments of the present application are described in further detail below with reference to the accompanying drawings.
The embodiment of the application provides a HUD light path projection system and a HUD light path projection method, which can adapt to sitting posture observation requirements of different front windshield angles and different drivers by adjusting a light path of a projection device. For example, the ' projection lens ' is arranged behind the ' reflecting mirror ', so that the light rays reflected by the ' projection lens ' directly face the front windshield, and the height of the image projected onto the front windshield is controlled, thereby solving the problem that the driver's eyes with small inclination angle cannot observe the image directly.
In order to achieve the technical effects, the general idea of the application is as follows:
a projection generating device configured to generate a projection;
the projection device is configured to receive the projection and project the projection to the front windshield, and the sum of the incident angle and the reflection angle of the projection to the front windshield is an acute angle.
In summary, when the projection is projected onto the front windshield at a smaller angle, the change of the elevation inclination angle of the front windshield has a smaller influence on the projection position. For example, the projection position is basically unchanged when the front wind is incident at a vertical angle and the inclination angle of the front wind shielding elevation is changed.
In order to better understand the above technical solution, the following detailed description is provided in connection with specific embodiments.
An embodiment of the present application provides a HUD optical path projection system, including:
a projection generating device configured to generate a projection;
the projection device is configured to receive the projection and project the projection to the front windshield, and the sum of the incident angle and the reflection angle of the projection to the front windshield is an acute angle.
Referring to fig. 3, when the sum of the incident angle and the reflection angle projected on the front windshield is an acute angle, the effect of the inclination angle of the front windshield on the projection is small, so that the device can adapt to the sitting posture observation requirements of different front windshield angles and different drivers.
Specifically, the projection device comprises a reflecting mirror and a projection mirror, wherein the reflecting mirror is configured to receive the projection of the projection generating device and reflect the projection towards the direction of a viewer, and the projection mirror is configured to receive the reflected projection and project the projection to the front windshield.
The projection is adjusted to be a flat-jet light path through reflection of the reflecting mirror, and then the projection through the projection mirror is projected on the front windshield. The projection lens is arranged at the rear of the reflecting mirror, so that light rays reflected by the projection lens directly face the front windshield, the height of an image projected onto the front windshield is controlled, and the problem that the driver's eyes of the front windshield with a small dip angle cannot observe the image directly is solved.
Specifically, in order to solve the problem that the projection position of the reflecting line of the projection mirror and the front windshield is higher when the front windshield with a small inclination angle is used, the reflecting mirror is arranged in front of the projector, and the concave surface of the projection mirror is arranged towards the front windshield, so that the light reflected by the projection mirror and the projection on the front windshield can be controlled at a lower position.
Optical path description: the light emitted forward by the projector is directed to the 'reflecting mirror' arranged in front, the light reflected by the 'reflecting mirror' is transmitted backward, and the light reaching the 'projecting mirror' with the advanced concave surface is directed to the front windshield at a lower angle.
Preferably, the angles of the reflecting mirror and the projection mirror are designed to be electrically adjustable, the HUD is provided with a driver eyespot position detection function, an optimal observation area of the eyes of a driver on a front windshield under a normal driving posture can be automatically calculated, and the angles of the reflecting mirror and the projection mirror are automatically adjusted by the HUD, so that the HUD can adapt to the sitting posture observation requirements of different front windshields and different drivers.
The embodiment of the application also provides a HUD light path projection system based on the embodiment, which comprises a calculation module, wherein the calculation module is configured to calculate the projection position and adjust the projection device.
Through the calculation module, the projection position of the projection system on the front windshield is further adjusted, so that a driver can obtain better impression experience.
Preferably, the HUD light path projection system includes an eyepoint detection sub-module, a projection positioning sub-module, a calculation sub-module, and an adjustment sub-module:
the eyepoint detection sub-module is configured to detect an eyeball position of a viewer;
the projection positioning sub-module is configured to position an optimal projection position according to the eyeball position;
the calculating submodule is configured to calculate a projection angle according to the optimal projection position;
the adjusting sub-module is configured to adjust the projection device to project forward at the projection angle.
Through the calculation of the 4 modules, no matter what sitting position the driver is in, the front wind shielding elevation inclination angle can realize a proper projection range.
The embodiment of the present application further provides a HUD optical path projection system, where the projection positioning sub-module is configured to position an optimal projection position according to the eyeball position, and the HUD optical path projection system includes:
the lower end point of the front windshield is used for constructing an (x, z) relative coordinate system for the coordinate origin (0, 0);
the eyeball position is (a, B), the lower eyeball line of sight and the front windshield are intersected at the point A, the upper eyeball line of sight and the front windshield are intersected at the point B, and the optimal observation area angle is within the range of 25 DEG upwards and 30 DEG downwards of the eyeball line of sight
The point A coordinates are ((b-0.577 a)/(ctanα -0.577), ctanα (b-0.577 a)/(ctanα -0.577));
the coordinates of the point B are as follows: ((b+0.466 a)/(ctanα+0.466), ctanα (b+0.466 a)/(ctanα+0.466));
thus, the optimal observation area range satisfies x ε [ (b-0.577a)/(ctanα -0.577), (b+0.466 a)/(ctanα+0.466) ],
and z epsilon [ ctanα (b-0.577a)/(ctanα -0.577), ctanα (b+0.466 a)/(ctanα+0.466) ],
wherein alpha is the front wind screen elevation inclination angle.
The projection range can be well confirmed through the positioning of eyeballs and the calculation of the sight line, and then the HUD is adjusted.
After the projection range is calculated, the internal components of the HUD can be adjusted.
Specifically, the projection device includes a reflecting mirror and a projecting mirror, the reflecting mirror is configured to receive the projection of the projection generating device and reflect the projection toward the driver direction of the viewer, the projecting mirror is configured to receive the reflected projection and project the projection onto the front windshield, the front windshield elevation angle is α, the projection angle of the projector is β, the elevation angle of the reflecting mirror is γ, and the elevation angle of the projecting mirror is δ, then:
the included angle between the projection light path and the front wind is (90+alpha+2delta-2 gamma-beta), the intersection point (X, Y) X is between (b-0.577a)/(ctanα -0.577) and (b+0.466 a)/(ctanα+0.466), and Y is between ctanα (b-0.577a)/(ctanα -0.577) and ctanα (b+0.466 a)/(ctanα+0.466).
When the condition is satisfied, the projection can be projected to the front windshield at a smaller angle, and the change of the elevation inclination angle of the front windshield has a smaller influence on the projection position.
For example, in order to solve the problem that the projection position of the reflecting line of the projection mirror and the front windshield is higher when the front windshield with a small inclination angle is provided, the reflecting mirror is arranged in front of the projector, and the concave surface of the projection mirror is arranged towards the front windshield, so that the control of the projection of the reflecting line of the projection mirror and the projection on the front windshield can be realized.
With the above arrangement, the light emitted forward by the projector is directed to the reflecting mirror arranged in front, the light reflected by the reflecting mirror propagates backward, and the light after reaching the projecting mirror of the concave lens is directed to the front windshield at a low angle.
Let front windshield arrange inclination alpha (preset constant), the projector is arranged horizontally, its emission light and horizontal contained angle beta (preset constant), reflecting mirror and horizontal arrangement contained angle gamma, projection mirror and horizontal arrangement contained angle delta, light 1 is the light of projector to the reflecting mirror, light 2 is the light of reflecting mirror to the projection mirror, light 3 is the light of projection mirror to keep out the wind forward. As shown in fig. 4, the entire optical path transfer path is as follows:
1. the projector emits light rays 1 to the reflecting mirror, and the incident angle of the light rays is (180-beta-gamma) DEG;
2. the reflection angle of the light ray 1 after being reflected by the reflecting mirror is equal to (180-beta-gamma) DEG, and the included angle between the light ray 2 and the horizontal is calculated to be (2 gamma+beta-180);
3. calculating the incident angle of the light ray 2 incident on the projection lens as delta+180-2 gamma-beta DEG;
4. the reflection angle of the light ray 3 is (delta+180-2 gamma-beta) DEG, and the included angle of the light ray 3 and the horizontal is (2 gamma+beta-2 delta) DEG;
5. the included angle between the light ray 3 and the front windshield is (90+alpha+2 delta-2 gamma-beta) DEG
Based on the same inventive concept, the application provides a HUD light path projection method, which comprises the following steps:
configuring a projection generating device to generate projection;
the projection device is configured to receive the projection and project the projection toward the front windshield, wherein the sum of the incident angle and the reflection angle of the projection on the front windshield is an acute angle.
Preferably, the projection device includes a reflecting mirror configured to receive the projection of the projection generating device and reflect toward the driver of the viewer, and a projection mirror configured to receive the reflected projection and project to the front windshield.
Further, before the front windshield projection, it includes:
detecting the eyeball position of a viewer;
positioning an optimal projection position according to the eyeball position;
calculating a projection angle according to the optimal projection position;
and adjusting the projection device to project forward in a windbreak way at the projection angle.
In particular, to account for differences in the optimal viewing area of the front windshield caused by differences in the sitting postures of different drivers, the projected area of the HUD projected onto the front windshield needs to be adjusted according to the actual optimal viewing area of the driver. And integrating a human eye position detection module on the HUD, wherein the eye position detection module determines the eye space position by scanning facial imaging of a human face. The eye point detection module is used for detecting the eye point position of a driver, and the HUD central control unit is used for calculating the optimal observation area of the actual driver on the front windshield by combining the front windshield angle. According to the optical route propagation, the HUD central control unit calculates the matching angles of the reflecting mirror and the projection mirror, and the reflecting mirror and the projection mirror automatically adjust the angles according to the calculated angles.
Specifically, as shown in fig. 5, the method comprises the following steps:
s1, detecting the position of the eyepoint of a driver by using a HUD (head-on display) self-carried eyepoint position detection module
S2, the HUD central control unit calculates an optimal observation area of the driver on the front windshield according to the eye position
S3, the HUD central control unit calculates the angle of the reflecting mirror and the projection mirror according to the optimal observation area of the front windshield
S4, adjusting the reflecting mirror and the projection mirror according to the calculated angle.
The positioning the optimal projection position according to the eyeball position comprises the following steps:
the lower end point of the front windshield is used for constructing an (x, z) relative coordinate system for the coordinate origin (0, 0);
the eyeball position is (a, B), the lower eyeball line of sight and the front windshield are intersected at the point A, the upper eyeball line of sight and the front windshield are intersected at the point B, and the optimal observation area angle is within the range of 25 DEG upwards and 30 DEG downwards of the eyeball line of sight
The point A coordinates are ((b-0.577 a)/(ctanα -0.577), ctanα (b-0.577 a)/(ctanα -0.577));
the coordinates of the point B are as follows: ((b+0.466 a)/(ctanα+0.466), ctanα (b+0.466 a)/(ctanα+0.466));
thus, the optimal observation area range satisfies x ε [ (b-0.577a)/(ctanα -0.577), (b+0.466 a)/(ctanα+0.466) ],
and z epsilon [ ctanα (b-0.577a)/(ctanα -0.577), ctanα (b+0.466 a)/(ctanα+0.466) ],
wherein alpha is the front wind screen elevation inclination angle.
Preferably, the projection device includes a reflecting mirror and a projecting mirror, the reflecting mirror is configured to receive the projection of the projection generating device and reflect the projection toward the driver direction of the viewer, the projecting mirror is configured to receive the reflected projection and project the projection onto the front windshield, the front windshield elevation angle is α, the projection angle of the projector is β, the elevation angle of the reflecting mirror is γ, and the elevation angle of the projecting mirror is δ, then:
the included angle between the projection light path and the front wind is (90+alpha+2delta-2 gamma-beta), the intersection point (X, Y) X is between (b-0.577a)/(ctanα -0.577) and (b+0.466 a)/(ctanα+0.466), and Y is between ctanα (b-0.577a)/(ctanα -0.577) and ctanα (b+0.466 a)/(ctanα+0.466).
The various modifications and specific examples of the embodiments of the system described above are equally applicable to the method of the present embodiment, and those skilled in the art will be aware of the implementation of the method of the present embodiment through the detailed description of the system described above, so they will not be described in detail herein for brevity.
Note that the above is only a preferred embodiment of the present application and the technical principle applied. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, while the application has been described in connection with the above embodiments, the application is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the application, which is set forth in the following claims.
In general, the HUD optical path projection system and the HUD optical path projection method provided by the embodiment of the application can solve the problem that the eyes of a driver with a small inclination angle in front of a windshield cannot directly observe images, and the driver can observe the images easily and conveniently.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. A HUD light path projection system, comprising:
a projection generating device configured to generate a projection;
the projection device is configured to receive the projection and project the projection to the front windshield, and the sum of the incident angle and the reflection angle of the projection on the front windshield is an acute angle;
the system also comprises an eyepoint detection sub-module, a projection positioning sub-module, a calculation sub-module and an adjustment sub-module:
the eyepoint detection sub-module is configured to detect an eyeball position of a viewer;
the projection positioning sub-module is configured to position an optimal projection position according to the eyeball position;
the calculating submodule is configured to calculate a projection angle according to the optimal projection position;
the adjusting sub-module is configured to adjust the projection device to project forward in a windbreak manner at the projection angle;
the projection positioning sub-module is configured to position an optimal projection position according to the eyeball position, including:
the lower end point of the front windshield is used for constructing an (x, z) relative coordinate system for the coordinate origin (0, 0);
the eyeball position is (a, B), the lower eyeball line of sight and the front windshield are intersected at the point A, the upper eyeball line of sight and the front windshield are intersected at the point B, and the optimal observation area angle is within the range of 25 DEG upwards and 30 DEG downwards of the eyeball line of sight
The point A coordinates are ((b-0.577 a)/(ctanα -0.577), ctanα (b-0.577 a)/(ctanα -0.577));
the coordinates of the point B are as follows: ((b+0.466 a)/(ctanα+0.466), ctanα (b+0.466 a)/(ctanα+0.466));
thus, the optimal observation area range satisfies x ε [ (b-0.577a)/(ctanα -0.577), (b+0.466 a)/(ctanα+0.466) ],
and z epsilon [ ctanα (b-0.577a)/(ctanα -0.577), ctanα (b+0.466 a)/(ctanα+0.466) ],
wherein alpha is the front wind screen elevation inclination angle.
2. A HUD optical path projection system according to claim 1, wherein:
the projection device comprises a reflecting mirror and a projection mirror, wherein the reflecting mirror is configured to receive the projection of the projection generating device and reflect the projection towards the direction of a viewer, and the projection mirror is configured to receive the reflected projection and project the projection to the front windshield.
3. The HUD optical path projection system of claim 1, further comprising a calculation module configured to calculate a projection position and adjust the projection device.
4. The HUD optical path projection system according to claim 1, wherein the projection device comprises a reflecting mirror and a projecting mirror, the reflecting mirror is configured to receive the projection of the projection generating device and reflect toward the driver of the viewer, the projecting mirror is configured to receive the reflected projection and project the reflected projection onto the front windshield, the front windshield elevation angle is α, the projection angle of the projector is β, the elevation angle of the reflecting mirror is γ, and the elevation angle of the projecting mirror is δ, then:
the included angle between the projection light path and the front wind is (90+alpha+2delta-2 gamma-beta), the intersection point (X, Y) X is between (b-0.577a)/(ctanα -0.577) and (b+0.466 a)/(ctanα+0.466), and Y is between ctanα (b-0.577a)/(ctanα -0.577) and ctanα (b+0.466 a)/(ctanα+0.466).
5. A HUD light path projection method, comprising:
configuring a projection generating device to generate projection;
the projection device is configured to receive the projection and project the projection towards the front windshield, wherein the sum of the incident angle and the reflection angle of the projection on the front windshield is an acute angle;
before the front windshield projection, comprising:
detecting the eyeball position of a viewer;
positioning an optimal projection position according to the eyeball position;
calculating a projection angle according to the optimal projection position;
adjusting the projection device to project forward in a windbreak way at the projection angle;
the positioning the optimal projection position according to the eyeball position comprises the following steps:
the lower end point of the front windshield is used for constructing an (x, z) relative coordinate system for the coordinate origin (0, 0);
the eyeball position is (a, B), the lower eyeball line of sight and the front windshield are intersected at the point A, the upper eyeball line of sight and the front windshield are intersected at the point B, and the optimal observation area angle is within the range of 25 DEG upwards and 30 DEG downwards of the eyeball line of sight
The point A coordinates are ((b-0.577 a)/(ctanα -0.577), ctanα (b-0.577 a)/(ctanα -0.577));
the coordinates of the point B are as follows: ((b+0.466 a)/(ctanα+0.466), ctanα (b+0.466 a)/(ctanα+0.466));
thus, the optimal observation area range satisfies x ε [ (b-0.577a)/(ctanα -0.577), (b+0.466 a)/(ctanα+0.466) ],
and z epsilon [ ctanα (b-0.577a)/(ctanα -0.577), ctanα (b+0.466 a)/(ctanα+0.466) ],
wherein alpha is the front wind screen elevation inclination angle.
6. A HUD light path projection method according to claim 5, wherein,
the projection device comprises a reflecting mirror and a projection mirror, wherein the reflecting mirror is configured to receive the projection of the projection generating device and reflect the projection towards the driver direction of a viewer, and the projection mirror is configured to receive the reflected projection and project the projection to the front windshield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111291485.0A CN114035324B (en) | 2021-10-31 | 2021-10-31 | HUD light path projection system and HUD light path projection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111291485.0A CN114035324B (en) | 2021-10-31 | 2021-10-31 | HUD light path projection system and HUD light path projection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114035324A CN114035324A (en) | 2022-02-11 |
| CN114035324B true CN114035324B (en) | 2023-09-22 |
Family
ID=80142680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111291485.0A Active CN114035324B (en) | 2021-10-31 | 2021-10-31 | HUD light path projection system and HUD light path projection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114035324B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323829A (en) * | 2011-07-29 | 2012-01-18 | 青岛海信电器股份有限公司 | Display screen visual angle regulating method and display device |
| WO2013084592A1 (en) * | 2011-12-06 | 2013-06-13 | シャープ株式会社 | Display system and automobile |
| CN103728727A (en) * | 2013-12-19 | 2014-04-16 | 财团法人车辆研究测试中心 | Information display system capable of automatically adjusting visual range and display method of information display system |
| CN104730712A (en) * | 2013-12-18 | 2015-06-24 | 现代自动车株式会社 | Display apparatus and method for vehicle |
| CN105774679A (en) * | 2014-12-25 | 2016-07-20 | 比亚迪股份有限公司 | Automobile, vehicle-mounted head-up displaying system and projection image height adjusting method |
| CN106445104A (en) * | 2016-08-25 | 2017-02-22 | 蔚来汽车有限公司 | Vehicle HUD display system and method |
| JP2019018770A (en) * | 2017-07-20 | 2019-02-07 | アルパイン株式会社 | Head-up display device |
| CN109889807A (en) * | 2019-03-14 | 2019-06-14 | 百度在线网络技术（北京）有限公司 | Vehicle-mounted projection adjusting method, device, equipment and storage medium |
| CN110058411A (en) * | 2019-03-22 | 2019-07-26 | 武汉格罗夫氢能汽车有限公司 | A kind of novel passenger car front windshield head-up-display system |
| CN212965636U (en) * | 2020-10-24 | 2021-04-13 | 深圳市锐思华创技术有限公司 | Head-up display optical system based on small inclination angle |
-
2021
- 2021-10-31 CN CN202111291485.0A patent/CN114035324B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323829A (en) * | 2011-07-29 | 2012-01-18 | 青岛海信电器股份有限公司 | Display screen visual angle regulating method and display device |
| WO2013084592A1 (en) * | 2011-12-06 | 2013-06-13 | シャープ株式会社 | Display system and automobile |
| CN104730712A (en) * | 2013-12-18 | 2015-06-24 | 现代自动车株式会社 | Display apparatus and method for vehicle |
| CN103728727A (en) * | 2013-12-19 | 2014-04-16 | 财团法人车辆研究测试中心 | Information display system capable of automatically adjusting visual range and display method of information display system |
| CN105774679A (en) * | 2014-12-25 | 2016-07-20 | 比亚迪股份有限公司 | Automobile, vehicle-mounted head-up displaying system and projection image height adjusting method |
| CN106445104A (en) * | 2016-08-25 | 2017-02-22 | 蔚来汽车有限公司 | Vehicle HUD display system and method |
| JP2019018770A (en) * | 2017-07-20 | 2019-02-07 | アルパイン株式会社 | Head-up display device |
| CN109889807A (en) * | 2019-03-14 | 2019-06-14 | 百度在线网络技术（北京）有限公司 | Vehicle-mounted projection adjusting method, device, equipment and storage medium |
| CN110058411A (en) * | 2019-03-22 | 2019-07-26 | 武汉格罗夫氢能汽车有限公司 | A kind of novel passenger car front windshield head-up-display system |
| CN212965636U (en) * | 2020-10-24 | 2021-04-13 | 深圳市锐思华创技术有限公司 | Head-up display optical system based on small inclination angle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114035324A (en) | 2022-02-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20180239152A1 (en) | Vehicle equipped with head-up display system and operation method of head-up display system thereof | |
| US10302940B2 (en) | Head-up display | |
| CN108225734B (en) | Error calibration system based on HUD system and error calibration method thereof | |
| JP5179575B2 (en) | Scanning image display device, eyeglass-type head mounted display, and automobile | |
| CN100412610C (en) | Device and system for display of information, and vehicle equipped with such a system | |
| US10836314B2 (en) | Display system, electronic mirror system, moving vehicle, and display method | |
| US11646000B2 (en) | Image display system, image display method, movable object including the image display system, and non-transitory computer-readable medium | |
| JP2010070066A (en) | Head-up display | |
| CN112904558B (en) | Head-up display calibration | |
| US10274726B2 (en) | Dynamic eyebox correction for automotive head-up display | |
| JP6706802B2 (en) | Display system, electronic mirror system, and moving body including the same | |
| JP6695062B2 (en) | Display system, control device, control method, program, and moving body | |
| CN106483659A (en) | Method for observing the eyes of the driver of the vehicle with HUD | |
| CN106536254A (en) | Vehicular head-up display device | |
| GB2458898A (en) | A head up display system with ghost image elimination means | |
| US10885819B1 (en) | In-vehicle augmented reality system | |
| US11945306B2 (en) | Method for operating a visual field display device for a motor vehicle | |
| CN218240558U (en) | Zoom compensation system of head-up display | |
| US20170235139A1 (en) | Head-up display, head-up display method and vehicle-mounted display device | |
| CN207752232U (en) | Windscreen formula head-up display device | |
| CN114035324B (en) | HUD light path projection system and HUD light path projection method | |
| CN207336931U (en) | Head-up display device | |
| JP2019026198A (en) | Head-up display device, and driver viewpoint detection method therefor | |
| CN113866989A (en) | Head-mounted display device capable of adjusting imaging distance | |
| WO2020009218A1 (en) | Head-up display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |