CN221225179U - Multi-virtual-image-surface head-up display device and vehicle - Google Patents

Abstract

The application provides a multi-virtual-image-plane head-up display device and a vehicle, wherein the multi-virtual-image-plane head-up display device comprises: the device comprises a first diffraction waveguide module, a second diffraction waveguide module, an optical machine module, a phase element and a reflecting unit; the first diffraction waveguide module comprises a first diffraction waveguide sheet, and the second diffraction waveguide module comprises a second diffraction waveguide sheet; the first diffraction waveguide sheet and the second diffraction waveguide sheet comprise a coupling-in region and a coupling-out region; the optical machine module comprises a first optical machine and a second optical machine; the phase element is arranged in the coupling-out area of the second diffraction waveguide sheet; the first image sent by the first optical machine is coupled in and coupled out by the first diffraction wave guide sheet and is transmitted to the first position of the reflecting unit; the second image sent by the second optical machine is coupled out from the second diffraction wave guide sheet and then is transmitted to a second position of the reflecting unit through the phase element; the second image sent by the second optical machine is different from the first image sent by the first optical machine in projection position through the phase element. So as to reduce the volume of the multi-virtual image face head-up display device.

Description

Multi-virtual-image-surface head-up display device and vehicle

Technical Field

The application relates to the technical field of optical display, in particular to a multi-virtual image plane head-up display device and a vehicle.

Background

The head-up display device is also called a head-up display system, and various driving information is virtually overlapped on road condition live-action, so that a driver can see key data without turning and lowering the head, and accordingly the driver always keeps the head-up posture, and potential safety hazards caused by eye-level switching are avoided. The head-up display device can improve the gesture sensing capability of a driver, reduce the reaction time and reduce the risk of collision of the vehicle.

With the development of head-up devices, a single virtual image distance becomes insufficient, and automobiles increasingly require head-up display devices having at least two virtual image viewing distances. The far virtual image vision distance can provide image information such as navigation, alarm and the like which need to be fused with road scenes and driving scenes, and the near virtual image vision distance can provide basic image information such as speed per hour, oil consumption, mileage and the like. With the improvement of optical performance, the volume of the head-up display device is increased.

Disclosure of utility model

The application provides a multi-virtual-image-plane head-up display device and a vehicle, and aims to solve the problem that the head-up display device achieving a plurality of different virtual image distances is large in size.

In a first aspect, the present application provides a multi-virtual image surface head-up display device, including: the device comprises a first diffraction waveguide module, a second diffraction waveguide module, an optical machine module, a phase element and a reflecting unit; the first diffraction waveguide module comprises at least one first diffraction waveguide sheet; the second diffraction waveguide module comprises at least one second diffraction waveguide sheet; the first diffraction waveguide sheet and the second diffraction waveguide sheet include a coupling-in region and a coupling-out region; the optical machine module comprises a first optical machine and a second optical machine; the phase element is arranged in the coupling-out area of the second diffraction waveguide sheet; light rays corresponding to the first image emitted by the first optical machine are coupled in and coupled out through the first diffraction waveguide sheet and are transmitted to a first position of the reflecting unit; light rays corresponding to a second image emitted by the second optical machine are coupled in and out through the second diffraction waveguide sheet, and the light rays corresponding to the second image are coupled out from the second diffraction waveguide sheet, then transmitted to a second position of the reflecting unit through the phase element.

Optionally, the light corresponding to the first image is reflected by the reflection unit and enters the human eye, the human eye can observe the first virtual image at the first viewing distance along the reverse extension line of the reflection route, the light corresponding to the second image is reflected by the reflection unit and enters the human eye, the human eye can observe the second virtual image at the second viewing distance along the reverse extension line of the reflection route, and the first viewing distance is longer than the second viewing distance.

Optionally, the first position is located at a height of the reflecting unit greater than a height of the second position.

Optionally, the phase element is a fresnel lens or an optical lens; the phase element is used for changing the focusing position of light corresponding to the second image coupled out by the second diffraction waveguide.

Optionally, the in-coupling region and the out-coupling region are periodic nano-grating structures.

Optionally, the first diffractive waveguide module and/or the second diffractive waveguide module include three diffractive waveguide sheets arranged in parallel.

Optionally, the reflecting unit is a windshield.

Optionally, the application provides a vehicle, which comprises the multi-virtual image surface head-up display device provided in the first aspect.

As can be seen from the above technical solution, the present application provides a multi-virtual image head-up display device and a vehicle, the multi-virtual image head-up display device includes: the device comprises a first diffraction waveguide module, a second diffraction waveguide module, an optical machine module, a phase element and a reflecting unit; the first diffraction waveguide module comprises at least one first diffraction waveguide sheet; the second diffraction waveguide module comprises at least one second diffraction waveguide sheet; the first diffraction waveguide sheet and the second diffraction waveguide sheet include a coupling-in region and a coupling-out region; the optical machine module comprises a first optical machine and a second optical machine; the phase element is arranged in the coupling-out area of the second diffraction waveguide sheet; light rays corresponding to the first image emitted by the first optical machine are coupled in and coupled out through the first diffraction waveguide sheet and are transmitted to a first position of the reflecting unit; light rays corresponding to a second image emitted by the second optical machine are coupled in and out through the second diffraction waveguide sheet, and the light rays corresponding to the second image are coupled out from the second diffraction waveguide sheet, enter the phase element and then are transmitted to a second position of the reflecting unit. The second image sent by the second optical machine is different from the first image sent by the first optical machine in projection position through the phase element.

According to the design and the device for multi-virtual-image face head-up display, a group of virtual image viewing distances capable of achieving infinite distance are small in whole body machine and simple in design compared with the existing method, and the practicability of the enhanced head-up display system is improved.

Drawings

In order to more clearly illustrate the technical solution of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic diagram of a multi-virtual image head-up display device according to an embodiment of the present application;

FIG. 2 is a schematic diagram illustrating light transmission of a first diffractive waveguide module according to an embodiment of the present application;

FIG. 3 is a schematic diagram illustrating light transmission of a second diffractive waveguide module according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a first diffractive waveguide module implementing a far virtual image plane according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a second diffractive waveguide module implementing a near-virtual image plane according to an embodiment of the present application;

Fig. 6 is a ray tracing diagram of a multi-virtual image surface head-up display device according to an embodiment of the present application.

Reference numerals:

Wherein, 11-the first diffraction waveguide module; 12-a second diffractive waveguide module; 21-a first optical machine; 22-a second optical machine; a 3-phase element; 4-reflecting unit.

Detailed Description

Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the examples below do not represent all embodiments consistent with the application. Merely exemplary of systems and methods consistent with aspects of the application as set forth in the claims.

The head-up display device is also called a head-up display system, and various driving information is virtually overlapped on road condition live-action, so that a driver can see key data without turning and lowering the head, and accordingly the driver always keeps the head-up posture, and potential safety hazards caused by eye-level switching are avoided. The head-up display device can improve the gesture sensing capability of a driver, reduce the reaction time and reduce the risk of collision of the vehicle. With the development of head-up devices, a single virtual image distance becomes insufficient, and automobiles increasingly require head-up display devices having at least two virtual image viewing distances. The far virtual image vision distance can provide image information such as navigation, alarm and the like which need to be fused with road scenes and driving scenes, and the near virtual image vision distance can provide basic image information such as speed per hour, oil consumption, mileage and the like. With the improvement of optical performance, the volume of the head-up display device is increased.

In order to solve the problem that the volume of the multi-virtual-image head-up display device is larger, referring to fig. 1, some embodiments of the present application provide a multi-virtual-image head-up display device, including: a first diffraction waveguide module 11, a second diffraction waveguide module 12, an optical-mechanical module, a phase element 3, and a reflection unit 4; the first diffractive waveguide module 11 includes at least one first diffractive waveguide sheet; the second diffractive waveguide module 12 includes at least one second diffractive waveguide sheet; the first diffraction waveguide sheet and the second diffraction waveguide sheet comprise a coupling-in region and a coupling-out region; the optical machine module comprises a first optical machine 21 and a second optical machine 22; the phase element 3 is arranged in the coupling-out area of the second diffraction waveguide sheet; light rays corresponding to the first image emitted by the first optical machine 21 are coupled in and coupled out through the first diffraction waveguide plate and transmitted to the first position of the reflecting unit 4; light rays corresponding to the second image emitted by the second optical machine 22 are coupled in and coupled out through the second diffraction waveguide plate, and the light rays corresponding to the second image are coupled out of the back carry phase element 3 from the second diffraction waveguide plate and then transmitted to the second position of the reflecting unit 4.

As shown in fig. 2 and 3, the first optical machine 21 in the first diffractive waveguide module 11 emits light corresponding to image information required by the first image, the light is coupled, diffracted and conducted by the first diffractive waveguide module 11, the emitted light is reflected by the reflection unit 4 to the human eye, and the human eye can observe the first image along the reverse extension line at infinity or near infinity. The second optical machine 22 in the second diffraction band module sends out the light corresponding to the image information required by the second image, the light is coupled, diffracted and conducted through the second diffraction band module, the outgoing light changes the light focusing position through the phase element 3, the outgoing light is reflected to the human eye through the reflection unit 4, and the human eye can observe the second image at the set viewing distance along the reverse extension line.

As shown in fig. 4 and 5, fig. 4 is a schematic diagram of a first image implemented by the first diffractive waveguide module 11, the first image beam is parallel light or nearly parallel light through the coupling-out region, and is traced back along the light, and the first image beam is imaged at infinity or nearly infinity, so that a clear image is observed at infinity or nearly infinity corresponding to the human eye. Fig. 5 is a schematic diagram of a second image implemented by the second diffractive waveguide module 12, in which the second image beam is parallel or nearly parallel through the coupling-out region, and after converging or diverging through the phase element 3, the second image beam is traced reversely along the light, and the second image beam is imaged at a set focal length, so that a second image is observed at a set viewing distance corresponding to the human eye.

In an actual use scene, the first image has a longer viewing distance, and the multi-virtual image head-up display device can provide image information such as navigation, alarm and the like which needs to be fused with a road management scene and a driving scene. The second image surface has a closer virtual image viewing distance, and the multi-virtual image surface head-up display device can provide basic image information such as speed per hour, oil consumption, mileage and the like. By arranging two groups of diffraction band modules, different images can be generated at two positions.

The first diffractive waveguide module 11 comprises at least one first diffractive waveguide sheet and the second diffractive waveguide module 12 comprises at least one second diffractive waveguide sheet. For example, when the first diffractive waveguide module 11 is composed of three diffractive waveguide sheets, each diffractive waveguide sheet modulates red, green and blue single-band light. When the second diffractive waveguide module 12 is composed of two diffractive waveguide sheets, one diffractive waveguide sheet modulates two waveguide lights (e.g., red and green wavelength band lights) and the other diffractive waveguide sheet modulates another wavelength band light (e.g., blue wavelength band light). Alternatively, one diffractive waveguide plate modulates two waveguide lights (e.g., red-green band lights) and the other diffractive waveguide plate modulates two waveguide lights (e.g., green-blue band lights). When the first diffraction band module and the second diffraction waveguide module 12 are composed of one diffraction band sheet, that is, one diffraction waveguide sheet modulates light of three bands of red, green and blue.

The first and second diffractive waveguide modules 11 and 12 also have the function of collimating and mydriasis the received light beam. The light beam enters the coupling-in region and is totally reflected and conducted in the diffraction waveguide sheet. When the light is transmitted to the coupling-out area, the light is coupled out from the coupling-out area, the first diffraction waveguide module 11 projects the light corresponding to the first image emitted by the first optical machine 21 onto the reflecting unit 4 after being coupled out from the coupling-out area, then reflects the light to the human eye, and sees the first image, and the second diffraction waveguide module 12 can project the light corresponding to the second image emitted by the second optical machine 22 onto the reflecting unit 4 through the phase element 3. Then reflected to the human eye, and a second image is seen, the first image being an image directly projected by the coupling-out region to the reflecting unit 4, and the second image being an image projected by the phase element 3 to the reflecting unit 4. The two images have different viewing distances, and the first image has a longer viewing distance than the second image.

The optical machine can transfer the received image light beam to the reflecting unit 4 with high efficiency and accuracy through the first diffraction waveguide module 11 and the second diffraction waveguide module 12, and the viewing distances of the first image and the second image can be optimized through the diffraction waveguide module and the phase element 3 so as to meet the requirements of different application scenes. In addition, since the diffraction waveguide sheet has a function of collimating and focusing the light beam, it also contributes to improvement of the image quality of the reflection unit 4.

The design and fabrication of diffractive waveguide modules requires a high degree of optical and mechanical skill. First, the fabrication of diffractive waveguide sheets requires precise nanoscale processing techniques to ensure that the beam is properly diffracted and coupled. Second, the assembly and tuning of the entire diffraction waveguide module also requires a high degree of expertise and precision equipment.

In some embodiments, the first location is located at a height of the reflective unit 4 that is greater than the second location is located at a height of the reflective unit 4. As shown in fig. 6, the first image emitted from the first diffractive waveguide module 11 is projected at the position of the reflecting unit 4 higher than the second image emitted from the second diffractive waveguide module 12 is projected at the position of the reflecting unit 4, and after being reflected by the reflecting unit 4 to the human eye, the height of the first position is greater than the height of the second position, so that the human eye can see the separated first image and second image at the same position. It will be appreciated that the diffractive waveguide module may also be added when more virtual images are required.

In some embodiments, the phase element 3 is a fresnel lens or an optical lens; the phase element 3 is used for changing the focusing position of the light corresponding to the second image coupled out by the second diffraction waveguide. Such as a compound lens formed by combining a plurality of fresnel lenses or optical lenses. The compound lens can have finer optical regulation performance, and can realize more accurate divergence or convergence of the second image. Other types of optical elements may also be used for the phase element 3, such as beam splitters, beam focusers etc. These optical elements may be used to change the propagation direction of the light beam, split the beam, focus, etc., thereby achieving a regulation of the generation of the second image by the reflection unit 4. The core function of the phase element 3 is to control the second image no matter what type of phase element is used, so that the reflection unit 4 can generate the second image. Such modulation may include changing the direction of propagation of the light beam, the shape of the light beam, the intensity of the light beam, etc., to achieve modulation of the shape, size, brightness, etc., of the generated second image.

In some embodiments, the in-coupling and out-coupling regions are periodic nanograting structures. The periodic grating structure includes a plurality of slits parallel to each other, each having the same width, and the plurality of slits are arranged at the same pitch. By coupling the first image beam and/or the second image into the periodic grating structure, the first image beam and/or the second image can be coupled into the periodic grating structure, and the coupled-in energy distribution can be controlled by controlling the width and pitch of the slits.

In some embodiments, the periodic grating structure may be made of a material having high reflectivity and low absorptivity, such as a metal or dielectric film. In addition, the wavelength and direction of the coupled-in energy distribution can be controlled by controlling the width and spacing of the slits. For example, the intensity of the image beam at certain wavelengths may be increased or the directional distribution of the image beam may be changed by decreasing the width of the slits or increasing the pitch of the slits.

In some embodiments, the first diffractive waveguide module 11 and/or the second diffractive waveguide module 12 comprises three diffractive waveguide sheets arranged in parallel. The three diffraction waveguide sheets are arranged in parallel, so that the color augmented reality display effect can be achieved when the first image passes through the diffraction waveguide sheets.

In other embodiments, when the first diffractive waveguide module 11 and/or the second diffractive waveguide module 12 only include one diffractive waveguide sheet to achieve a color display effect, the coupling-in area and the coupling-out area include a plurality of structural unit pixels, each structural unit pixel includes at least three structural sub-unit pixels, and each structural sub-unit pixel is correspondingly coupled with different primary color image light information, so as to achieve a color display.

In some embodiments, the reflective unit 4 is a windshield. The first image and/or the second image projected by the first diffraction waveguide module 11 and/or the second diffraction waveguide module 12 on the windshield are reflected to the human eye at a certain reflection angle, and the human eye can see the image with a certain projection distance through the windshield.

In some embodiments, a vehicle is provided according to an embodiment of the present application, including the multi-virtual image head-up display device provided in the above embodiment. The multi-virtual image face head-up display device can project important vehicle information (such as speed, navigation, telephone and the like) into the field of view of a driver, and does not interfere the attention of the driver to road conditions. At the same time, since the information is a virtual image, the driver's attention is not distracted, thereby reducing the risk of accidents. In addition, by projecting the vehicle information directly into the driver's field of view, the driver does not need to look at the dashboard or center control screen with low head, thereby saving time and improving driving efficiency. The multi-virtual-image-plane head-up display device can adapt to different environments and illumination conditions, and can ensure that a driver can clearly see information under any condition. In addition, the neck fatigue of the driver is also reduced since it is not necessary to look down at the dashboard or center control screen for a long time.

As can be seen from the above technical solution, the present application provides a multi-virtual image face head-up display device and a vehicle, the multi-virtual image head-up display device includes: a first diffraction waveguide module 11, a second diffraction waveguide module 12, an optical-mechanical module, a phase element 3, and a reflection unit 4; the first diffractive waveguide module 11 includes at least one first diffractive waveguide sheet; the second diffractive waveguide module 12 includes at least one second diffractive waveguide sheet; the first diffraction waveguide sheet and the second diffraction waveguide sheet comprise a coupling-in region and a coupling-out region; the optical machine module comprises a first optical machine 21 and a second optical machine 22; the phase element 3 is arranged in the coupling-out area of the second diffraction waveguide sheet; light rays corresponding to the first image emitted by the first optical machine 21 are coupled in and coupled out through the first diffraction waveguide plate and transmitted to the first position of the reflecting unit 4; light rays corresponding to the second image emitted by the second optical machine 22 are coupled in and coupled out through the second diffraction waveguide plate, and the light rays corresponding to the second image are coupled out of the back carry phase element 3 from the second diffraction waveguide plate and then transmitted to the second position of the reflecting unit 4. The second image emitted from the second camera 22 is projected at a different position from the first image emitted from the first camera 21 by the phase element 3. According to the design and the device for multi-virtual-image face head-up display, a group of virtual image viewing distances capable of achieving infinite distance are small in whole body machine and simple in design compared with the existing method, and the practicability of the enhanced head-up display system is improved.

The above-provided detailed description is merely a few examples under the general inventive concept and does not limit the scope of the present application. Any other embodiments which are extended according to the solution of the application without inventive effort fall within the scope of protection of the application for a person skilled in the art.

Claims (8)

1. A multi-virtual image surface head-up display device, comprising: the device comprises a first diffraction waveguide module, a second diffraction waveguide module, an optical machine module, a phase element and a reflecting unit; the first diffraction waveguide module comprises at least one first diffraction waveguide sheet; the second diffraction waveguide module comprises at least one second diffraction waveguide sheet; the first diffraction waveguide sheet and the second diffraction waveguide sheet include a coupling-in region and a coupling-out region; the optical machine module comprises a first optical machine and a second optical machine; the phase element is arranged in the coupling-out area of the second diffraction waveguide sheet; light rays corresponding to the first image emitted by the first optical machine are coupled in and coupled out through the first diffraction waveguide sheet and are transmitted to a first position of the reflecting unit; light rays corresponding to a second image emitted by the second optical machine are coupled in and out through the second diffraction waveguide sheet, and the light rays corresponding to the second image are coupled out from the second diffraction waveguide sheet, then transmitted to a second position of the reflecting unit through the phase element.

2. The head-up display device with multiple virtual images according to claim 1, wherein the light corresponding to the first image is reflected by the reflection unit and enters the human eye, the human eye can observe the first virtual image at a first viewing distance along a reverse extension line of the reflection route, the light corresponding to the second image is reflected by the reflection unit and enters the human eye, the human eye can observe the second virtual image at a second viewing distance along the reverse extension line of the reflection route, and the first viewing distance is longer than the second viewing distance.

3. A multiple virtual image plane head-up display device according to claim 1, wherein the first position is located at a height of the reflection unit greater than the second position is located at a height of the reflection unit.

4. The multi-virtual image surface head-up display device of claim 1, wherein the phase element is a fresnel lens or an optical lens; the phase element is used for changing the focusing position of light corresponding to the second image coupled out by the second diffraction waveguide.

5. The multi-virtual image surface head-up display device of claim 1, wherein the in-coupling region and the out-coupling region are periodic nano-grating structures.

6. The multi-virtual image surface head-up display device of claim 1, wherein the first diffractive waveguide module and/or the second diffractive waveguide module comprises three diffractive waveguide sheets arranged in parallel.

7. A multiple virtual image plane head-up display device according to claim 1, wherein the reflecting unit is a windshield.

8. A vehicle comprising a multiple virtual image surface head-up display device according to any one of claims 1 to 7.