CN116500784A

CN116500784A - Display device and vehicle

Info

Publication number: CN116500784A
Application number: CN202210074512.7A
Authority: CN
Inventors: 赵晗; 方元戎; 赵晴
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2023-07-28
Also published as: CN115561906A; WO2023138076A1

Abstract

The present application relates to a display device including a housing, a reflection assembly located inside the housing, and an image generating unit located outside the housing. The image generation unit is used for generating imaging light containing image information, projecting the imaging light to the reflection assembly in the shell, and enabling the imaging light to enter the reflection assembly after transmitting the shell; the reflection assembly is used for reflecting the received imaging light to the outside of the shell. In the display device provided in the application, the image generating unit is located outside the housing, and thus does not need to occupy a space inside the housing. When the display device is mounted on the instrument panel of the vehicle, the position of the image generating unit can be flexibly adjusted according to the requirement, the space on the instrument panel can be fully utilized, the space occupied by the display device on the vehicle is reduced as a whole, and the display device is convenient to mount on the vehicle with smaller space.

Description

Display device and vehicle

Technical Field

The present disclosure relates to the field of image display, and more particularly, to a display device and a vehicle.

Background

With the continuous development of automobile technology, the requirements on the convenience and safety of automobile use are increasing. Head Up Display (HUD) devices have been widely used in automobiles. The head-up display is a device for projecting instrument information (such as speed), navigation information and the like to the front of the visual field of a driver, the driver can see the instrument information and the navigation information in front of the visual field, and the instrument panel or the central control display screen below the steering wheel does not need to be observed at a low head, so that the braking response time under emergency conditions can be improved, and the driving safety is improved.

In the head-up display device in the prior art, imaging light emitted by an image source is projected onto a windshield of an automobile after multiple reflections, and the windshield further reflects the imaging light to eyes of a driver. The existing head-up display device is large in size (12-20 liters) generally, cannot be installed on an automobile with a small space, and is poor in adaptability.

Disclosure of Invention

In view of this, the embodiments of the present application provide a display device and a vehicle, which occupy a smaller volume and can be mounted on a vehicle with a smaller space.

In a first aspect, a display device provided herein may include: the image generating device comprises a housing, a reflecting assembly positioned inside the housing and an image generating unit positioned outside the housing.

The image generation unit is used for generating imaging light containing image information, projecting the imaging light to the reflection assembly in the shell, and enabling the imaging light to enter the reflection assembly after transmitting the shell; the reflection assembly is used for reflecting the received imaging light to the outside of the shell.

In the display device provided in this embodiment, the image generating unit is located outside the housing, and thus does not need to occupy a space inside the housing. When the display device is mounted on an Instrument Panel (IP) table of a vehicle, the position of the image generating unit can be flexibly adjusted according to the requirement, the space on the IP table can be fully utilized, the space occupied by the display device on the vehicle is reduced as a whole, the display device is convenient to mount on the vehicle with smaller space, and the adaptability is better.

In the display device provided in this embodiment, the housing may function as dust-proof and house the reflection assembly, and the housing may also be referred to as a casing or a dust cover.

In one possible solution, the imaging light projected by the image generating unit is transmitted from the first surface of the housing to the reflecting component, and the imaging light reflected by the reflecting component is transmitted from the first surface, i.e. the imaging light is incident and transmitted from the same surface of the housing.

In one possible solution, the imaging light projected by the image generating unit is transmitted from the second surface of the housing to the reflecting component, and the imaging light reflected by the reflecting component is transmitted from the third surface of the housing, i.e. the imaging light is incident and transmitted from different surfaces of the housing.

In the scheme, the relative positions of the image generating unit and the shell can be adjusted according to the needs, and the flexibility is good.

In one possible solution, the image generating unit comprises a light source for outputting a light beam to the image module, an imaging module for generating imaging light containing image information from the light beam, and a projection lens for projecting the imaging light towards the reflection assembly.

In one possible arrangement, the reflective assembly may comprise one or more reflective elements, for example comprising a curved mirror or a combination of curved and reflective mirrors. The imaging light projected by the image generating unit is incident to the reflecting mirror, the reflecting mirror is used for reflecting the incident imaging light to the curved mirror, and the curved mirror is used for reflecting the received imaging light to the outside of the shell.

In one possible solution, the mirror may be a planar mirror.

In one possible solution, the imaging light projected by the image generating unit is P polarized light, S polarized light, circularly polarized light or elliptically polarized light, and the P polarized light, S polarized light, circularly polarized light or elliptically polarized light may be reflected by the reflecting component to the windshield.

In one possible solution, the imaging light exiting from the housing to the outside of the housing is S polarized light. Further, S polarized light may be incident on the windshield. The S polarized light may be better reflected by the windshield to the human eye than other polarized light, thereby improving display effects, such as enhancing display brightness and resolution.

In one possible aspect, the display apparatus further includes a first polarization conversion device located on an optical path between the image generating unit and the reflection assembly for changing a polarization direction of the imaged light projected by the image generating unit. The first polarizing component may also change the polarization direction of the imaging light reflected by the reflecting component.

The first polarization converter is used for converting the polarization directions of the imaging light projected by the image generating unit and the imaging light reflected by the reflecting component, so that the polarization direction of the imaging light emitted by the display device can be converted according to the requirements (such as the requirements of a windshield), and the flexibility is better.

For example, the imaging light projected by the image generating unit is P polarized light, the first polarization converter converts the P polarized light into circularly polarized light, the circularly polarized light is reflected by the reflection assembly and then passes through the first polarization converter, and the circularly polarized light is converted into S polarized light and is emitted from the housing.

In one possible solution, the first polarization converter is a 1/4 wave plate, a 1/8 wave plate or a 1/2 wave plate.

In one possible solution, the position of the first polarization converter may be flexibly set according to the need, and may be located at any one or more of the light emitting side of the image generating unit, the first surface, the second surface of the housing, and the reflecting surface of the reflecting component (the reflecting mirror and the curved mirror). For example, the 1/4 wave plate and the 1/8 wave plate may be located inside or outside the first surface of the housing. The 1/4 wave plate and the 1/8 wave plate may be located inside or outside the second surface of the housing.

In one possible aspect, the display apparatus further includes a second polarization conversion device located on a propagation path of the imaging light reflected from the reflection assembly for changing a polarization direction of the imaging light reflected from the reflection assembly.

In one possible solution, the second polarization converter is a 1/4 wave plate or a 1/8 wave plate.

In one possible solution, the positions of the 1/4 wave plate and the 1/8 wave plate can be flexibly set according to the needs, and the positions can be located on the inner side or the outer side of the reflecting surface of the reflecting mirror, the reflecting surface of the curved mirror and the first surface of the shell.

In one possible solution, the second polarization converter may be used in combination with the first polarization converter, for example by providing the first polarization means on the second surface of the housing and the second polarization means on the first surface of the housing.

In one possible solution, the second polarization converter and the first polarization converter may be identical, i.e. one polarization device may perform the respective functions of the second polarization converter and the first polarization converter, e.g. changing the polarization direction of the imaging light projected by the image generating unit and changing the polarization direction of the imaging light reflected by the reflecting assembly at the same time.

In one possible solution, the display device may further include a diffusion screen, which is located on the light emitting side of the image generating unit, for diffusely reflecting the imaging light incident on the image generating unit. The diffusely reflected light may be incident on the reflective assembly.

In a possible embodiment, the display device further comprises a polarizer located at the light exit side of the image generation unit, the polarizer transmitting S-polarized light or P-polarized light.

In one possible embodiment, the mirror is located within the focal length of the curved mirror, and the image reflected by the mirror may be magnified and displayed by the curved mirror.

In one possible embodiment, the first polarization conversion device is adhered to the first surface, the second surface, and the reflecting surface of the reflecting member (the reflecting mirror and the curved mirror) of the housing, thereby reducing the volume.

In one possible embodiment, the first polarization conversion device is attached to the reflective surface of the planar mirror. Compared with the sticking of the first polarization conversion device on the curved mirror, the first polarization conversion device has higher sticking degree with the plane mirror and better display effect.

In one possible embodiment, the curved mirror is a multifocal curved mirror or a free-form curved mirror.

In a second aspect, the present application provides a vehicle comprising a display device as described in the first aspect.

In one possible arrangement, the display device is mounted in an instrument panel of the vehicle.

In one possible arrangement, the vehicle further comprises a windscreen, the imaged light emitted by the display device being incident on the windscreen, the windscreen reflecting it to the human eye.

In one possible solution, the imaging light emitted by the display device is S polarized light.

In one possible scheme, the windshield is further provided with a P-transmitting and S-reflecting film, so that S-polarized light emitted by the display device can be reflected to human eyes, stray light (P-polarized light) emitted by the display device is filtered, and the display effect is improved.

Drawings

Fig. 1 is a schematic diagram of a usage scenario of a display device provided in an embodiment of the present application;

fig. 2 is a schematic view of a display device according to an embodiment of the present disclosure mounted on a vehicle;

FIG. 3 is a schematic view of another display device according to an embodiment of the present disclosure mounted on a vehicle;

FIG. 4 is a schematic view of another display device according to an embodiment of the present disclosure mounted on a vehicle;

FIG. 5 is a schematic view of another display device according to an embodiment of the present disclosure mounted on a vehicle;

FIG. 6 is a schematic view of another display device according to an embodiment of the present disclosure mounted on a vehicle;

FIG. 7 is a schematic view of another display device according to an embodiment of the present disclosure mounted on a vehicle;

FIG. 8 is a schematic view of another display device according to an embodiment of the present disclosure mounted on a vehicle;

FIG. 9 is a schematic view of another display device according to an embodiment of the present disclosure mounted on a vehicle;

fig. 10 is a schematic structural diagram of an image generating unit in the display device according to the embodiment of the present application;

fig. 11 is a schematic circuit diagram of a display device according to an embodiment of the disclosure;

fig. 12 is a functional schematic of a vehicle according to an embodiment of the present application.

Detailed Description

The application provides a display device, an electronic apparatus and a vehicle. The display device may be used in many scenarios, such as automotive scenarios, and the display device in the present application may be used as a HUD.

Referring to fig. 1, a head-up display device (abbreviated as HUD) can project navigation information, instrument information and the like in a front view range of a driver, so as to avoid the driver from looking down at the information, thereby affecting driving safety. After the HUD projected image is reflected by a windshield (windshield), virtual images are formed outside the vehicle, and the virtual images can be overlapped on the real environment outside the vehicle, so that a driver can obtain the visual effect of augmented reality (Augmented Reality, AR), and the functions of AR navigation, self-adaptive cruising, lane departure early warning and the like are realized. Types of HUDs include, but are not limited to, windshield (W) -HUD, augmented reality head up display (AR-HUD), and the like.

In this application, the display device may also be referred to as a display system or a virtual image display device. The units or modules included in the display device may be referred to as components or mechanisms.

Referring to fig. 2, fig. 2 is a schematic diagram of a display device according to an embodiment of the present application mounted on a vehicle.

As shown in fig. 2, the display device includes a housing 110, an image generation unit (Picture Generation Unit, PGU) 120, and a reflection assembly in the housing 110. Among other things, the PGU 120 may be referred to as an image source, which is located outside the housing 110. The reflective assembly in the housing 110 includes a curved mirror 113 in this embodiment. The housing 110 may include a transparent first surface 111.

The PGU 120 generates imaging light including image information, and projects the imaging light toward the curved mirror 113, and the projected imaging light is incident on the curved mirror 113 after being transmitted through the first surface 111 of the housing 110. The curved mirror 113 reflects the received imaging light to the outside of the housing 110. Wherein the imaging light reflected by the curved mirror 113 is transmitted out of the first surface 111 of the housing 110, e.g. to a windscreen, which further reflects the imaging light to the human eye, which can see the virtual image through the windscreen. In addition, since the concave surface of the curved mirror 113 reflects the imaging light, the image generated by the PGU 120 can be enlarged by the curved mirror 113, and the user can see the enlarged virtual image.

In the display device provided in this embodiment, the PGU120 is located outside the housing 110, so that the space inside the housing 110 is not required. When the display device is mounted on an Instrument Panel (IP) board of a vehicle, the position of the PGU120 can be flexibly adjusted according to needs, for example, the PGU120 is placed at a position of a light shielding plate (as shown in fig. 2), and the function of the light shielding plate can be replaced, so that the space occupied by the display device on the IP board of the vehicle is reduced, the display device can be mounted on the vehicle with smaller space, and the adaptability is better. The light shielding plate can shield external sunlight from entering the display device (commonly called sunlight backflow), the display device of the embodiment does not need the light shielding plate, and the PGU120 can play a role in shielding sunlight, so that the cost can be reduced.

In the display device provided in this embodiment, the imaging light projected by the PGU120 may be P-polarized light, S-polarized light or circularly polarized light, and the P-polarized light, the S-polarized light or the circularly polarized light is reflected by the curved mirror 113 and then emitted from the first surface 111 of the housing 110, and is incident on the windshield, where the windshield may reflect the P-polarized light, the S-polarized light or the circularly polarized light to the human eye.

With further reference to fig. 2, the display device provided in this embodiment may further include a 1/4 wave plate (or phase retarder) 112, where the 1/4 wave plate 112 is located on a reflecting surface of the curved mirror 113, and may change a polarization direction of the imaging light projected by the PGU120, and may also change a polarization direction of the imaging light reflected by the curved mirror 113.

For example, the imaging light projected by the PGU 120 is P polarized light (indicated by double arrow), which is converted into circularly polarized light or elliptically polarized light after passing through the 1/4 wave plate 112 for the first time, and the circularly polarized light or elliptically polarized light is reflected by the curved mirror 113, and then passes through the 1/4 wave plate 112 again, and the imaging light transmitted from the 1/4 wave plate 112 is S polarized light (indicated by dot), and the S polarized light is transmitted from the first surface 111 of the housing 110 and is incident on the windshield.

In this embodiment, the position of the curved mirror 113 may be adjusted so that the incident angle of the S-polarized light transmitted from the first surface 111 of the housing 110 to the windshield is close to or equal to the brewster angle, so that most of the S-polarized light is reflected by the windshield to the human eye, improving the definition and brightness of the image, and obtaining a better visual effect.

Referring to fig. 3, fig. 3 is a schematic view of another display device according to an embodiment of the present application mounted on a vehicle.

The embodiment shown in fig. 3 is similar to the embodiment of fig. 2, and differs from the embodiment of fig. 2 mainly in that the 1/4 wave plate 212 is disposed on the first surface 111 of the housing 110, and the 1/4 wave plate 212 can change the polarization direction of the imaging light projected by the PGU 120, and can also change the polarization direction of the imaging light reflected by the curved mirror 113.

For example, the imaging light projected by the PGU 120 is P polarized light (indicated by double arrow), which is converted into circularly polarized light or elliptically polarized light (indicated by ellipse) after passing through the 1/4 wave plate 212 for the first time, and the circularly polarized light or elliptically polarized light is reflected by the curved mirror 113, and then passes through the 1/4 wave plate 212 again, and the imaging light emitted from the 1/4 wave plate 212 is S polarized light (indicated by dot), and the S polarized light is transmitted from the first surface 111 of the housing 110 and is incident on the windshield.

The 1/4 wave plate 212 may be located outside the first surface 111 or inside the first surface 111 (shown in fig. 3).

Referring to fig. 4, fig. 4 is a schematic view of another display device according to an embodiment of the present application mounted on a vehicle.

The embodiment shown in fig. 4 is similar in structure to the embodiment of fig. 2, with the main difference that the imaging light projected by the PGU 120 is transmitted from the second surface 114 of the housing 110 to the curved mirror 113, and the imaging light reflected by the curved mirror 113 is transmitted from the first surface 111 to the outside of the housing 110. Wherein, the first surface 111 and the second surface 114 may be transparent surfaces.

In this embodiment, the 1/4 wave plate 112 is also located on the reflecting surface of the curved mirror 113, and the position of the curved mirror 113 can be adjusted according to the position of the PGU 120, so that the imaging light reflected by the curved mirror 113 can be emitted through the first surface 111.

The display device provided in this embodiment sets the PGU 120 at the side of the housing 110, and can use the space at the side of the housing 110 in combination with the overall layout of the IP station of the vehicle, so that the adaptability is better. In addition, the optical path of the imaging light emitted by the PGU 120 in the embodiment where the imaging light enters the curved mirror 113 and the optical path of the imaging light reflected by the curved mirror 113 do not intersect, so that crosstalk between the imaging light can be reduced, and the display effect can be improved.

Referring to fig. 5, fig. 5 is a schematic view of another display device according to an embodiment of the present application mounted on a vehicle.

The embodiment shown in FIG. 5 is similar in structure to the embodiment of FIG. 4, with the primary difference being that a 1/4 wave plate 213 is positioned on the second surface 114 of the housing 110, which can change the polarization direction of the imaging light projected by the PGU 120. In addition, a 1/4 wave plate 212 is disposed on the first surface 111 of the housing 110, which can change the polarization direction of the imaging light reflected by the curved mirror 113.

For example, the imaging light projected by the PGU 120 is P polarized light (indicated by double arrow), which is converted into circularly polarized light or elliptically polarized light (indicated by ellipse) by the 1/4 wave plate 213, reflected by the curved mirror 113, and then passes through the 1/4 wave plate 212, and the imaging light emitted from the 1/4 wave plate 212 is S polarized light (indicated by dot), which is transmitted from the first surface 111 of the housing 110 and is incident on the windshield.

The optical path of the imaging light emitted by the PGU 120 in this embodiment, where the imaging light is incident on the curved mirror 113, and the optical path of the imaging light reflected by the curved mirror 113 are not intersected, so that two different 1/4 wave plates 213 and 212 may be disposed according to different optical paths, so as to improve the conversion efficiency between linearly polarized light and circularly polarized light, for example, improve the conversion efficiency of converting P polarized light into circularly polarized light, and further improve the purity of the imaging light emitted by the display device as a whole, so that most of the imaging light is reflected to the human eye by the windshield, and the display effect is enhanced.

In this embodiment, the 1/4 wave plate 213 may be located on the inner side of the second surface 114 (shown in fig. 5) or on the outer side of the second surface 114. Since second surface 114 is planar, 1/4 wave plate 213 can better conform to second surface 114 and is more convenient to mount. In addition, the 1/4 wave plate 213 may be located at the light emitting side of the PGU 120, that is, the imaging light emitted by the PGU 120 as a whole is circularly polarized light or elliptically polarized light, and the circularly polarized light or elliptically polarized light is incident on the curved mirror 113. The 1/4 wave plate can also be replaced by a 1/8 wave plate, and the effect of the two 1/8 wave plates is similar to that of 1/4 wave plate. For example, a 1/8 wave plate may be provided on each of the first surface 111, the second surface 114, and the reflective surface of the curved mirror 113.

Referring to fig. 6, fig. 6 is a schematic view of another display device according to an embodiment of the present application mounted on a vehicle.

The embodiment shown in fig. 6 is similar to the embodiment of fig. 5, with the main difference that the imaging light emitted by PGU 120 is circularly or elliptically polarized light, and 1/4 wave plate 213 is located on second surface 114 of housing 110, and no 1/4 wave plate is located on first surface 111.

The PGU 120 projects circularly polarized light or elliptically polarized light (shown by an ellipse) which is converted into linearly polarized light, for example, S polarized light by passing through the 1/4 wave plate 213, and the S polarized light is reflected by the curved mirror 113, transmitted from the first surface 111 of the housing 110, and is incident on the windshield.

Referring to fig. 7, fig. 7 is a schematic view of another display device according to an embodiment of the present application mounted on a vehicle.

As shown in fig. 7, the display device includes a housing 310, a PGU320, and a reflection assembly in the housing 310. Wherein PGU320 is located outside of housing 110, the reflective assembly in housing 310 comprises curved mirror 313 and mirror 312 in this embodiment. The housing 310 may include a transparent first surface 311.

The PGU320 generates imaging light including image information, and projects the imaging light toward the mirror 312, and the projected imaging light is incident on the mirror 312 after being transmitted through the first surface 311 of the housing 310. The mirror 312 reflects the received imaging light toward the curved mirror 313, and the curved mirror 313 reflects the received imaging light to the outside of the housing 310. Wherein the imaging light reflected by curved mirror 313 is transmitted out of first surface 311, e.g. to a windshield, which further reflects the imaging light to the human eye, which can see the virtual image through the windshield. Further, since the concave surface of the curved mirror 313 reflects the imaging light, the image generated by the PGU320 can be enlarged by the curved mirror 313 so that the user can see the enlarged virtual image.

In the display device provided in this embodiment, the PGU320 is located outside the housing 310, so that the space inside the housing 310 is not required. When the display device is mounted on the IP station of the vehicle, the position of the PGU320 may be adjusted as required, for example, the PGU may be placed at the position of the light shielding plate (shown in fig. 7), instead of the function of the light shielding plate, so that the space occupied by the display device on the IP station of the vehicle is reduced, so that the display device may be mounted on the vehicle with smaller space, and the adaptability is better.

In the display device provided in this embodiment, the imaging light projected by the PGU320 may be P-polarized light, S-polarized light or circularly polarized light, and the P-polarized light, the S-polarized light or the circularly polarized light is reflected by the plane mirror 312 and the curved mirror 313 and then emitted from the first surface 111 of the housing 310 to be incident on the windshield.

With further reference to fig. 7, the display device provided in this embodiment may further include a 1/4 wave plate 315, where the 1/4 wave plate 315 is located on a reflecting surface of the reflecting mirror 312, and may change a polarization direction of the imaging light projected by the PGU320, and may also change a polarization direction of the imaging light reflected by the reflecting mirror 312. For example, the imaging light projected by the PGU320 is P polarized light (indicated by double arrow), the imaging light is converted into circularly polarized light or elliptically polarized light after passing through the 1/4 wave plate 315 for the first time, the circularly polarized light or elliptically polarized light is reflected by the reflecting mirror 312, the imaging light transmitted through the 1/4 wave plate 315 is S polarized light (indicated by dot) again, the S polarized light is incident on the curved mirror 313, the curved mirror 313 reflects the S polarized light to the first surface 311 of the housing 310, and the S polarized light is incident on the windshield after transmitting through the first surface 311.

In this embodiment, the position of the curved mirror 313 or the reflecting mirror 312 may be adjusted so that the incident angle of the S-polarized light transmitted from the first surface 311 of the housing 310 to the windshield is close to or equal to the brewster angle, so that most of the S-polarized light is reflected to the human eye, and a better visual effect is obtained.

Referring to fig. 8, fig. 8 is a schematic view of another display device according to an embodiment of the present application mounted on a vehicle.

The embodiment shown in FIG. 8 is similar in structure to the embodiment of FIG. 7, with the main difference that the 1/4 wave plate 316 is positioned on the reflective surface of the curved mirror 313, and the 1/4 wave plate 316 can change the polarization direction of the imaging light reflected by the mirror 312, and can also change the polarization direction of the imaging light reflected by the curved mirror 313.

For example, the imaging light projected by the PGU 320 is P polarized light (indicated by double arrow), the imaging light is transmitted to the first surface 311 and then reflected by the reflecting mirror 312 to the curved mirror 313, the imaging light is converted into circularly polarized light or elliptically polarized light after passing through the 1/4 wave plate 316 for the first time, the circularly polarized light or elliptically polarized light is reflected by the curved mirror 313 and then passes through the 1/4 wave plate 316 again, the imaging light transmitted from the 1/4 wave plate 316 is S polarized light (indicated by dot), and the S polarized light is incident on the windshield after transmitting through the first surface 311.

The beneficial effects of this embodiment are described with reference to the embodiment of fig. 7, and are not described herein.

Referring to fig. 9, fig. 9 is a schematic view of another display device according to an embodiment of the present application mounted on a vehicle.

The embodiment shown in FIG. 9 is similar in structure to the embodiment of FIG. 7, with the main difference that a 1/4 wave plate 317 is positioned on the first surface 311 of the housing 310, which can change the polarization direction of the imaging light projected by the PGU 320, and can also change the polarization direction of the imaging light reflected by the curved mirror 313.

For example, the imaging light projected by the PGU 320 is P polarized light (indicated by double arrow), which is converted into circularly polarized light or elliptically polarized light (indicated by ellipse) after passing through the 1/4 wave plate 317 for the first time, and the circularly polarized light or elliptically polarized light is reflected by the reflecting mirror 312 to the curved mirror 313, and after being reflected by the curved mirror 313, the imaging light emitted from the 1/4 wave plate 317 again passes through the 1/4 wave plate 317 is S polarized light (indicated by dot), and the S polarized light imaging light is transmitted from the first surface 311 of the housing 310 and is incident on the windshield.

The 1/4 wave plate 317 may be located outside the first surface 311 or inside the first surface 311 (shown in fig. 9). The beneficial effects of the present embodiment are referred to the embodiment corresponding to fig. 7, and are not described herein.

Referring to fig. 10, fig. 10 is a schematic structural diagram of an image generating unit in the display device according to the embodiment of the present application.

As shown in fig. 10, the image generating unit (which may be referred to as an optical machine) includes a light source 501, an imaging module 502, and a projection lens 503, and may be used in the aforementioned display device or may be used independently.

The light source 501 in the present embodiment outputs white light (primary color light) to the imaging module 502. The imaging module 502 may use white light to generate a source image, outputting imaging light. The projection lens 503 is for projecting imaging light outward, and may be a short-focus lens.

The imaging module 502 in this embodiment may be a liquid crystal on silicon (Liquid Crystal On Silicon, LCOS) display, an Organic Light-Emitting Diode (OLED) display, a liquid crystal display (Liquid Crystal Display, LCD), a digital Light processing (Digital Light Procession, DLP) display, or a Micro-Electro-Mechanical Systems (MEMS) display, etc.

The light-emitting surface of the projection lens 503 may be provided with a polarizer, a 1/4 wave plate, a 1/8 wave plate, a 1/2 wave plate, and the like. The imaging light projected by the projection lens 503 may be linearly polarized light, circularly polarized light or elliptically polarized light, so that subsequent elements of the image generating unit can process the imaging light conveniently.

Referring to fig. 11, fig. 11 is a schematic circuit diagram of a display device according to an embodiment of the present application.

As shown in fig. 11, the circuits in the display device mainly include a processor 1001, an internal memory 1002, an external memory interface 1003, an audio module 1004, a video module 1005, a power module 1006, a wireless communication module 1007, an i/O interface 1008, a video interface 1009, a controller area network (Controller Area Network, CAN) transceiver 1010, a display circuit 1028, an imaging device 1029, and the like. The processor 1001 and its peripheral elements, such as the memory 1002, the can transceiver 1010, the audio module 1004, the video module 1005, the power module 1006, the wireless communication module 1007, the i/O interface 1008, the video interface 1009, the touch unit 1010, and the display circuit 1028, may be connected through a bus. The processor 1001 may be referred to as a front-end processor.

In addition, the circuit diagram illustrated in the embodiment of the present application does not constitute a specific limitation of the display device. In other embodiments of the present application, the display device may include more or less components than illustrated, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 1001 includes one or more processing units, for example: the processor 1001 may include an application processor (Application Processor, AP), a modem processor, a graphics processor (Graphics Processing Unit, GPU), an image signal processor (Image Signal Processor, ISP), a controller, a video codec, a digital signal processor (Digital Signal Processor, DSP), a baseband processor, and/or a Neural network processor (Neural-Network Processing Unit, NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors.

A memory may also be provided in the processor 1001 for storing instructions and data. For example, an operating system of the display device, an AR Creator software package, and the like are stored. In some embodiments, the memory in the processor 1001 is a cache memory. The memory may hold instructions or data that the processor 1001 has just used or recycled. If the processor 1001 needs to reuse the instruction or data, it can be called directly from the memory. Repeated accesses are avoided and the latency of the processor 1001 is reduced, thus improving the efficiency of the system.

In some embodiments, the display device may also include a plurality of Input/Output (I/O) interfaces 1008 coupled to the processor 1001. The interface 1008 may include, but is not limited to, an integrated circuit (Inter-Integrated Circuit, I2C) interface, an integrated circuit built-in audio (Inter-Integrated Circuit Sound, I2S) interface, a pulse code modulation (Pulse Code Modulation, PCM) interface, a universal asynchronous receiver Transmitter (Universal Asynchronous Receiver/Transmitter, UART) interface, a mobile industry processor interface (Mobile Industry Processor Interface, MIPI), a General-Purpose Input/Output (GPIO) interface, a subscriber identity module (Subscriber Identity Module, SIM) interface, and/or a universal serial bus (Universal Serial Bus, USB) interface, among others. The I/O interface 1008 may be connected to a mouse, a touch screen, a keyboard, a camera, a speaker/horn, a microphone, or may be connected to physical keys (e.g., a volume key, a brightness adjustment key, an on/off key, etc.) on the display device.

The internal memory 1002 may be used to store computer-executable program code that includes instructions. The memory 1002 may include a stored program area and a stored data area. The storage program area may store an application program (such as a call function, a time setting function, an AR function, etc.) required for at least one function of the operating system, etc. The storage data area may store data created during use of the display device (e.g., phone book, universal time, etc.), etc. In addition, the internal memory 1002 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash memory (Universal Flash Storage, UFS), and the like. The processor 1001 performs various functional applications of the display device and data processing by executing instructions stored in the internal memory 1002 and/or instructions stored in a memory provided in the processor 1001.

The external memory interface 1003 may be used to connect to an external memory (for example, micro SD card), and the external memory may store data or program instructions as needed, and the processor 1001 may perform operations such as reading and writing on these data or program execution through the external memory interface 1003.

The audio module 1004 is used to convert digital audio information into an analog audio signal output and also to convert an analog audio input into a digital audio signal. The audio module 1004 may also be used to encode and decode audio signals, such as for playback or recording. In some embodiments, the audio module 1004 may be provided in the processor 1001, or a part of functional modules of the audio module 1004 may be provided in the processor 1001. The display device may implement audio functions through an audio module 1004, an application processor, and the like. Such as music playing, talking, etc.

The video interface 1009 may receive input audio and video, which may specifically be a high-definition multimedia interface (High Definition Multimedia Interface, HDMI), a digital video interface (Digital Visual Interface, DVI), a video graphics array (Video Graphics Array, VGA), a Display Port (DP), a low voltage differential signal (Low Voltage Differential Signaling, LVDS) interface, a flat panel display connection (FPD-Link, flat Panel Display Link) interface, and the like, and the video interface 1009 may also output video. For example, the display device receives video data transmitted by the navigation system, video data transmitted by the receiving domain controller, or video data transmitted by the AR Creator through the video interface.

The video module 1005 may decode the video input by the video interface 1009, for example, h.264 decoding. The video module can also encode the video collected by the display device, for example, H.264 encoding is carried out on the video collected by the external camera. The processor 1001 may decode the video input from the video interface 1009 and output the decoded image signal to the display circuit.

Further, the display device further includes a CAN transceiver 1010, and the CAN transceiver 1010 may be connected to a CAN BUS (CAN BUS) of the automobile. The display device CAN communicate with in-vehicle entertainment systems (music, radio, video modules), vehicle status systems, etc. via the CAN bus. For example, the user may turn on the in-vehicle music play function by operating the display device. The vehicle status system may send vehicle status information (doors, seat belts, etc.) to a display device for display.

The display circuit 1010 and the imaging device 1011 realize a function of displaying an image together. The display circuit 1010 receives an image signal output from the processor 1001, processes the image signal, and inputs the processed image signal to the imaging device 1011 for imaging. The display circuit 1010 can also control an image displayed by the imaging device 1011. For example, parameters such as display brightness or contrast are controlled. The display circuit 1010 may include a driving circuit, an image control circuit, and the like.

The imaging device 1011 is configured to modulate a light beam input from a light source in accordance with an input image signal, thereby generating a visual image. The imaging device 1011 may be a liquid crystal on silicon panel, a liquid crystal display panel, or a digital micromirror device.

In this embodiment, the video interface 1009 may receive input video data (or referred to as a video source), and the video module 1005 outputs an image signal to the display circuit 1010 after decoding and/or digitizing, and the display circuit 1010 drives the imaging device 1011 to image a light beam emitted by the light source according to the input image signal, so as to generate a visual image (emit imaging light).

The power module 1006 is configured to provide power to the processor 1001 and the light source based on input power (e.g., direct current), and the power module 1006 may include a rechargeable battery that may provide power to the processor 1001 and the light source. Light emitted from the light source may be transmitted to the imaging device 1029 for imaging, thereby forming an image light signal (imaging light).

In addition, the power module 1006 may be connected to a power module (e.g., a power battery) of the vehicle, and the power module 1006 of the display device is powered by the power module of the vehicle.

The wireless communication module 1007 may enable the display device to communicate wirelessly with the outside world, which may provide solutions for wireless communication such as wireless local area network (Wireless Local Area Networks, WLAN) (e.g., wireless fidelity (Wireless Fidelity, wi-Fi) network), bluetooth (BT), global navigation satellite system (Global Navigation Satellite System, GNSS), frequency modulation (Frequency Modulation, FM), near field wireless communication technology (Near Field Communication, NFC), infrared technology (IR), etc. The wireless communication module 1007 may be one or more devices that integrate at least one communication processing module. The wireless communication module 1007 receives electromagnetic waves via an antenna, modulates the electromagnetic wave signals, filters the electromagnetic wave signals, and transmits the processed signals to the processor 1001. The wireless communication module 1007 may also receive signals to be transmitted from the processor 1001, frequency modulate them, amplify them, and convert them to electromagnetic waves for radiation via an antenna.

In addition, the video data decoded by the video module 1005 may be received wirelessly by the wireless communication module 1007 or read from the internal memory 1002 or the external memory, for example, the display apparatus may receive video data from a terminal device or an in-vehicle entertainment system through a wireless lan in the vehicle, and the display apparatus may also read audio/video data stored in the internal memory 1002 or the external memory, in addition to the video data input through the video interface 1009.

Referring to fig. 12, fig. 12 is a functional schematic diagram of a vehicle according to an embodiment of the present application.

The vehicle may include various subsystems such as a sensor system 21, a control system 22, one or more peripheral devices 23 (one shown as an example), a power source 24, a computer system 25, and a display system 26, which may communicate with each other. Display system 22 may include a display device provided by embodiments of the present application. The display system 22 in this embodiment may also include components other than the display device, such as a windshield that reflects the imaging light emitted by the display device to the human eye.

The vehicle may also include other functional systems such as an engine system, a cabin, etc. that power the vehicle, as not limited herein.

The sensor system 21 may include a plurality of detecting devices, which can sense the measured information and convert the sensed information into an electrical signal or other information output in a desired form according to a certain rule. As illustrated, these detection devices may include, without limitation, a global positioning system (Global Positioning System, GPS), a vehicle speed sensor, an inertial measurement unit (Inertial Measurement Unit, IMU), a radar unit, a laser rangefinder, an imaging device, a wheel speed sensor, a steering sensor, a gear sensor, or other elements for automatic detection, and so forth.

The control system 22 may include several elements such as a steering unit, a braking unit, a lighting system, an autopilot system, a map navigation system, a network timing system, and an obstacle avoidance system as shown. The control system 22 may receive information (e.g., vehicle speed, vehicle distance, etc.) sent by the sensor system 21, and may implement functions such as automatic driving, map navigation, etc.

Optionally, control system 14 may also include elements such as throttle controls and engine controls for controlling the speed of travel of the vehicle, as not limited in this application.

Peripheral 23 may include several elements such as a communication system, a touch screen, a user interface, a microphone, and a speaker, among others. Wherein the communication system is used for realizing network communication between the vehicle and other devices except the vehicle. In practical applications, the communication system may employ wireless communication technology or wired communication technology to enable network communication between the vehicle and other devices. The wired communication technology may refer to communication between the vehicle and other devices through a network cable or an optical fiber, etc.

The power source 24 represents a system that provides power or energy to the vehicle, which may include, but is not limited to, a rechargeable lithium battery or lead acid battery, or the like. In practical applications, one or more battery packs in the power supply are used to provide electrical energy or power for vehicle start-up, and the type and materials of the power supply are not limited in this application.

Several functions of the vehicle may be controlled by the computer system 25. The computer system 25 may include one or more processors 2501 (illustrated as one processor) and memory 2502 (which may also be referred to as storage devices). In practical applications, the memory 2502 may be internal to the computer system 25, or external to the computer system 25, for example, as a cache in a vehicle, and the present application is not limited thereto.

The processor 2501 may include one or more general-purpose processors, such as a graphics processor (graphic processing unit, GPU), among others. The processor 2501 is operable to execute programs, or instructions corresponding to programs, stored in the memory 2502 to perform corresponding functions for the vehicle.

The memory 2502 may include volatile memory (RAM) such as; the memory may also include a non-volatile memory (non-volatile memory), such as ROM, flash memory (flash memory), HDD, or solid state disk SSD; memory 2502 may also include combinations of the above types of memory. The memory 2502 may be used to store a set of program codes or instructions corresponding to the program codes so that the processor 2501 invokes the program codes or instructions stored in the memory 2502 to implement the corresponding functions of the vehicle. In this application, the memory 2502 may store a set of program codes for vehicle control, which the processor 2501 invokes to control safe driving of the vehicle, as to how safe driving of the vehicle is achieved, as described in detail below.

Alternatively, the memory 2502 may store information such as road maps, driving routes, sensor data, and the like, in addition to program code or instructions. The computer system 25 may implement the relevant functions of the vehicle in combination with other elements in the functional framework schematic of the vehicle, such as sensors in the sensor system, GPS, etc. For example, the computer system 25 may control the traveling direction or traveling speed of the vehicle, etc., based on the data input of the sensor system 21, without limitation of the present application.

Display system 26 may display image information such as navigation information, play video, and the like. The specific structure of the display system 26 refers to the embodiment of the display device described above, and will not be described herein.

The four subsystems shown in the present embodiment are only examples, and the sensor system 21, the control system 22, the computer system 25 and the display system 26 are not limiting. In practical applications, the vehicle may combine several elements in the vehicle according to different functions, thereby obtaining subsystems with corresponding different functions. In actual practice, the vehicle may include more or fewer subsystems or elements, as the application is not limited.

The vehicles in the embodiment of the application can be known vehicles such as automobiles, airplanes, ships, rockets and the like, and can also be new vehicles in the future. The vehicle may be an electric vehicle, a fuel vehicle, or a hybrid vehicle, for example, a pure electric vehicle, an extended range electric vehicle, a hybrid electric vehicle, a fuel cell vehicle, a new energy vehicle, etc., which is not particularly limited in this application. In addition, the electronic device in the embodiment of the present application includes a device mounted with a display device, which may include the above-described vehicle, and may also be used as a medical device, an office entertainment device, or an industrial control device, which is not limited in this embodiment.

The terms "first, second, third, etc. in this application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order, it being understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be implemented in a sequence not described herein. To more clearly illustrate the relationship of components in different embodiments, the present application uses the same reference numbers to designate components of different embodiments that are functionally the same or similar.

It should also be noted that, unless specifically stated otherwise, a specific description of some features in one embodiment may also be applied to explaining other embodiments to mention corresponding features.

Wherein like parts are referred to each other in the various embodiments herein. The foregoing is merely specific embodiments of the present application, and the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are intended to be covered by the scope of the present application.

Claims

1. A display device, comprising:

a housing, an image generation unit located outside the housing, and a reflection assembly located inside the housing;

The image generation unit is used for generating imaging light containing image information, projecting the imaging light to a reflection assembly in the shell, and enabling the imaging light to enter the reflection assembly after transmitting the shell;

the reflection assembly is used for reflecting the received imaging light, and the reflected imaging light is transmitted through the shell and then emitted to the outside of the shell.

2. The display device of claim 1, wherein,

imaging light projected by the image generating unit is transmitted from the first surface of the housing to the reflecting component, and imaging light reflected by the reflecting component is transmitted from the first surface.

3. The display device of claim 1, wherein,

imaging light projected by the image generating unit is transmitted from the second surface of the housing to the reflecting component, and imaging light reflected by the reflecting component is transmitted from the third surface of the housing.

4. A display device according to any one of claims 1-3,

the imaging light projected by the image generating unit is P polarized light, S polarized light or circularly polarized light.

5. The display device according to claim 4, wherein the imaging light emitted from the housing to the outside of the housing is S-polarized light.

6. The display device according to claim 4, further comprising:

and the first polarization conversion device is positioned on the optical path between the image generation unit and the reflection assembly and is used for changing the polarization direction of the imaging light projected by the image generation unit and the polarization direction of the imaging light reflected by the reflection assembly.

7. The display apparatus of claim 6, wherein the first polarization conversion device is a 1/4 wave plate.

8. The display apparatus of claim 6, wherein the first polarization conversion device is disposed on a reflective surface of the reflective assembly.

9. A display device according to any one of claims 1-3,

the reflecting component comprises a curved mirror and a reflecting mirror;

imaging light projected by the image generating unit is incident to the reflecting mirror, the reflecting mirror is used for reflecting the incident imaging light to the curved mirror, and the curved mirror is used for reflecting the received imaging light to the outside of the shell.

10. The display device of claim 9, wherein the mirror is a planar mirror.

11. A display device according to any one of claims 1-3,

The image generation unit comprises a light source, an imaging module and a projection lens;

the light source is used for outputting a light beam to the image module, the image module is used for generating image light containing image information according to the light beam, and the projection lens is used for projecting the image light to the reflection assembly.

12. A vehicle comprising a display device according to any one of claims 1-11, said display device being mounted in an instrument panel of said vehicle.