WO2023138138A1 - 一种显示装置和交通工具 - Google Patents

一种显示装置和交通工具 Download PDF

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Publication number
WO2023138138A1
WO2023138138A1 PCT/CN2022/127532 CN2022127532W WO2023138138A1 WO 2023138138 A1 WO2023138138 A1 WO 2023138138A1 CN 2022127532 W CN2022127532 W CN 2022127532W WO 2023138138 A1 WO2023138138 A1 WO 2023138138A1
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WO
WIPO (PCT)
Prior art keywords
imaging light
image source
polarization conversion
conversion device
curved mirror
Prior art date
Application number
PCT/CN2022/127532
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English (en)
French (fr)
Inventor
赵晗
方元戎
赵晴
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2023138138A1 publication Critical patent/WO2023138138A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • 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
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another

Definitions

  • the present application relates to the field of image display, and, more particularly, to a display device and a vehicle.
  • head up displays head up displays, HUDs
  • HUDs head up displays
  • the present application provides a display device and a vehicle.
  • the display device provided in the present application can be applied to a HUD and reduce the volume of the HUD.
  • the embodiment of the present application provides a display device.
  • the device includes: a first image source, a second image source, a first curved mirror, a semi-transparent and semi-reflective element and a dust cover.
  • the first image source is configured to generate first imaging light including first image information, and project the first imaging light to the first surface of the first curved mirror.
  • the first curved mirror is used to transmit the first imaging light from the second surface of the first curved mirror to the first surface of the transflective element, and is also used to reflect the first imaging light and the second imaging light from the semi-transparent element to the dust cover on the second surface of the first curved mirror.
  • the second image source is configured to generate second imaging light containing second image information, and project the second imaging light onto the second surface of the transflective element.
  • the transflective element is configured to reflect the first imaging light on the first surface of the transflective element to the second surface of the first curved mirror, and transmit the second imaging light from the first surface of the transflective element to the second surface of the first curved mirror.
  • the dust cover is configured to transmit the first imaging light and the second imaging light reflected by the first curved mirror.
  • the first image source is located outside the first surface of the first curved mirror.
  • the half-reflective element may be a plane mirror coated with a half-reflective film, or other optical elements capable of realizing half-flective effect.
  • the first image source is placed outside the first curved mirror, and the effect of reducing the size of the display device can be realized by utilizing the space behind the curved mirror.
  • the device further includes: an optical element.
  • the optical element is configured to reflect the second imaging light emitted by the second image source to the second surface of the transflective element.
  • the optical element may be a reflective mirror or a free-form surface mirror, or other optical elements with a reflection light path, or the like.
  • the volume of the display device can be further reduced by using the optical element to fold the optical path between the second image source and the transflective element.
  • the apparatus further includes: a first polarization conversion device.
  • the first polarization conversion device is located on the optical path between the first curved mirror and the transflective element, and is used to change the polarization direction of the first imaging light transmitted from the first curved mirror, and the polarization direction of the first imaging light reflected from the first surface of the transflective element, and is also used to change the polarization direction of the second imaging light transmitted from the first surface of the transflective element.
  • the first polarization conversion device is located on the first surface of the transflective element.
  • the apparatus further includes: a second polarization conversion device.
  • the second polarization conversion device is located on the optical path between the second image source and the transflective element, and is used for changing the polarization direction of the second imaging light emitted from the second image source.
  • the second polarization conversion device is located on an exit surface of the second image source or on a second surface of the transflective element.
  • the optical element is further configured to transmit the first imaging light transmitted from the second surface of the transflective element, wherein the second polarization conversion device is located on the second surface of the transflective element.
  • the optical element includes a third polarization conversion device and a transmission plate.
  • the third polarization conversion device is used to transmit the first imaging light transmitted from the second surface of the transflective element, and reflect the second imaging light emitted from the second image source, and the transmission plate is used to transmit the first imaging light transmitted by the third polarization conversion device.
  • the third polarization conversion device may also be called a transflective element, which is used to transmit polarized light in a specific polarization direction and reflect polarized light in another polarization direction.
  • a transflective element which is used to transmit polarized light in a specific polarization direction and reflect polarized light in another polarization direction.
  • it can be used to transmit S light and reflect P light.
  • the display device provided by the present application can eliminate internal stray light through the third polarization conversion device, thereby improving imaging quality.
  • the first polarization conversion device and the second polarization conversion device are 1/4 wave plates.
  • the polarization directions of the first imaging light and the second imaging light transmitted from the dust cover are the same.
  • the first imaging light emitted by the first image source is polarized light
  • the second imaging light emitted by the second image source is polarized light
  • the polarized light is P light or S light.
  • the first imaging light emitted by the first image source and the second imaging light emitted by the second image source are P light.
  • the first surface of the first curved mirror is coated with a transmissive S-reflective film or attached with a transmissive P-reflective S film.
  • the transparent P-reflective S film may be a dual brightness enhancement film (DBEF).
  • DBEF dual brightness enhancement film
  • the embodiment of the present application provides a display device.
  • the device comprises: a first image source, a second image source, a first curved mirror, a semi-transparent and semi-reflective element and a dust cover.
  • the first image source is configured to generate first imaging light including first image information, and project the first imaging light to the dust cover.
  • the second image source is configured to generate second imaging light containing second image information, and project the second imaging light onto the second surface of the transflective element.
  • the dust cover is used to transmit the first imaging light to the first surface of the transflective element.
  • the transflective element is configured to reflect the first imaging light on the first surface of the transflective element to the first surface of the first curved mirror, and transmit the second imaging light from the second surface of the transflective element to the first surface of the first curved mirror.
  • the first curved mirror is used to reflect the first imaging light and the second imaging light to the dust cover.
  • the dust cover is also used to transmit the first imaging light and the second imaging light reflected by the first curved mirror to the outside of the dust cover.
  • the first image source is located outside the dust cover.
  • the first image source when the display device is applied to a HUD system, the first image source may be placed at the position of the shading plate in the HUD system, replacing the function of the shading plate to block sunlight.
  • placing the first image source on the outside of the dust cover, for example, at the position of the visor can reduce the volume of the HUD system, so that the HUD system can be adapted to more car models.
  • the device further includes: an optical element.
  • the optical element is configured to reflect the second imaging light emitted by the second image source to the second surface of the transflective element.
  • the embodiment of the present application can further reduce the size of the display device by folding the optical path between the second image source and the transflective film by the optical element.
  • the apparatus further includes: a first polarization conversion device.
  • the first polarization conversion device is located on an optical path between the dust cover and the transflective element, and is configured to change the polarization direction of the first imaging light transmitted from the dust cover, and the polarization direction of the first imaging light reflected from the first surface of the transflective element, and is also used to change the polarization direction of the second imaging light transmitted from the first surface of the transflective element.
  • the first polarization conversion device is located on the first surface of the transflective element.
  • the apparatus further includes: a first polarization conversion device.
  • the first polarization conversion device is located on the optical path between the first curved mirror and the dust cover, and is used to change the polarization direction of the first imaging light transmitted from the dust cover, and the polarization directions of the first imaging light and the second imaging light reflected from the first surface of the first curved mirror.
  • the first polarization conversion device is located on an inner surface of the dust cover.
  • the apparatus further includes: a first polarization conversion device.
  • the first polarization conversion device is located on the optical path between the first curved mirror and the dust cover, and is used to change the polarization direction of the first imaging light emitted from the first image source, and the polarization directions of the first imaging light and the second imaging light reflected from the first surface of the first curved mirror.
  • the first polarization conversion device is located on an outer surface of the dust cover.
  • the device further includes: a second polarization conversion device.
  • the first polarization conversion device is located on the optical path between the second image source and the transflective element, and is used for changing the polarization direction of the second imaging light emitted from the second image source.
  • the second polarization conversion device is located on an exit surface of the second image source or on a second surface of the transflective element.
  • the optical element is further configured to transmit the first imaging light transmitted from the second surface of the transflective element, wherein the second polarization conversion device is located on the second surface of the transflective element.
  • the optical element includes a third polarization conversion device and a transmission plate.
  • the third polarization conversion device is used to transmit the first imaging light transmitted from the second surface of the transflective element, and reflect the second imaging light emitted by the second image source, and the transmission plate is used to transmit the first imaging light transmitted by the third polarization conversion device.
  • the third polarization conversion device provided by the embodiment of the present application can reflect specific polarized light and transmit other polarized light, thereby reducing stray light in the display device and improving imaging quality.
  • the first polarization conversion device and the second polarization conversion device are 1/4 wave plates.
  • the apparatus further includes: a first polarization conversion device.
  • the first polarization conversion device is located on the optical path between the transflective element and the first curved mirror, and is used to change the polarization direction of the first imaging light reflected from the first surface of the transflective element, and the polarization direction of the second imaging light transmitted from the first surface of the transflective element, and is also used to change the polarization direction of the first imaging light and the second imaging light reflected from the first surface of the first curved mirror.
  • the first polarization conversion device is located on the first surface of the first curved mirror.
  • the first polarization conversion device is a 1/4 wave plate.
  • the polarization directions of the first imaging light and the second imaging light emitted from the dust cover are the same.
  • the first imaging light emitted by the first image source is polarized light
  • the second imaging light emitted by the second image source is polarized light
  • the polarized light includes P light and S light
  • the first imaging light emitted by the first image source and the second imaging light emitted by the second image source are P light.
  • the first image source and the second image source emit light with the same polarization direction (for example, P light), so that the polarization direction of the final imaged light beam is S light. Since the reflectivity of the S light increases as the incident angle increases, the embodiments provided in the present application can increase the viewing angle of the display device. When the display device provided by the present application is applied to the HUD system, it can meet the requirements of more car models.
  • the embodiment of the present application provides a display device.
  • the device includes: a first image source, a second image source, a first curved mirror, a semi-transparent and semi-reflective element and a dust cover.
  • the first image source is configured to generate first imaging light including first image information, and project the first imaging light to the dust cover.
  • the second image source is configured to generate second imaging light containing second image information, and project the second imaging light onto the first surface of the first curved mirror.
  • the first curved mirror is used to transmit the second imaging light from the second surface of the first curved mirror to the first surface of the transflective element, and reflect the first imaging light and the second imaging light to the dust cover.
  • the transflective element is used to reflect the first imaging light on the first surface of the transflective element to the first surface of the first curved mirror, and reflect the second imaging light on the first surface of the transflective element to the first surface of the first curved mirror.
  • the dust cover is used to transmit the first imaging light to the first surface of the transflective element, and transmit the first imaging light and the second imaging light reflected by the first curved surface mirror to the outside of the dust cover.
  • the first image source is located outside the dust cover, and the second image source is located outside the first surface of the first curved mirror.
  • the device further includes: an optical element.
  • the optical element is configured to reflect the second imaging light reflected by the first surface of the transflective element to the first surface of the first curved mirror.
  • the optical element is a reflecting mirror or a second curved mirror.
  • the device further includes: a first polarization conversion device.
  • the first polarization conversion device is located on the optical path between the dust cover and the transflective element, and is used to change the polarization direction of the first imaging light transmitted from the second surface of the dust cover, the polarization direction of the first imaging light reflected from the first surface of the transflective element, and is also used to change the polarization direction of the second imaging light transmitted from the second surface of the first curved mirror, and the polarization direction of the second imaging light reflected from the first surface of the transflective element.
  • the first polarization conversion device is located on the first surface of the transflective element.
  • the first polarization conversion device is a 1/4 wave plate.
  • the polarization directions of the first imaging light and the second imaging light emitted from the dust cover are the same.
  • the first imaging light emitted by the first image source is polarized light
  • the second imaging light emitted by the second image source is polarized light
  • the polarized light includes P light and S light
  • the first imaging light emitted by the first image source and the second imaging light emitted by the second image source are P light.
  • the embodiment of the present application provides a vehicle.
  • the vehicle includes the display device in the above first aspect and any possible implementation manner of the first aspect, or includes the display device in the above second aspect and any possible implementation manner of the second aspect, or includes the display device in the above third aspect and any possible implementation manner of the third aspect.
  • the display device is installed in the dashboard of the vehicle.
  • the vehicle further includes a windshield, the first imaging light and the second imaging light emitted by the display device are incident on the windshield, and the windshield reflects them to human eyes.
  • the first imaging light and the second imaging light emitted by the display device are S-polarized light.
  • the windshield is also provided with a P-reflective S film, which can reflect the S-polarized light emitted by the display device to the human eye, and filter out the stray light (P light) emitted by the display device, thereby improving the display effect.
  • a P-reflective S film which can reflect the S-polarized light emitted by the display device to the human eye, and filter out the stray light (P light) emitted by the display device, thereby improving the display effect.
  • FIG. 1 shows a schematic diagram of an application scenario of a display device provided by an embodiment of the present application.
  • FIG. 2 shows a schematic structural diagram of a display device 200 provided by an embodiment of the present application.
  • FIG. 3 shows a schematic structural diagram of a first image source 210 or a second image source 220 provided by an embodiment of the present application.
  • FIG. 4 shows a schematic structural diagram of a display device 400 provided by an embodiment of the present application.
  • FIG. 5 shows a schematic structural diagram of a display device 500 provided by an embodiment of the present application.
  • FIG. 6 shows a schematic structural diagram of a display device 600 provided by an embodiment of the present application.
  • FIG. 7 shows a schematic structural diagram of a display device 700 provided by an embodiment of the present application.
  • FIG. 8 shows a schematic structural diagram of a display device 800 provided by an embodiment of the present application.
  • FIG. 9 shows a schematic structural diagram of a display device 900 provided by an embodiment of the present application.
  • FIG. 10 shows a schematic structural diagram of a display device 1000 provided by an embodiment of the present application.
  • FIG. 11 shows a schematic structural diagram of a display device 1100 provided by an embodiment of the present application.
  • FIG. 12 shows a schematic structural diagram of a display device 1200 provided by an embodiment of the present application.
  • FIG. 13 shows a schematic structural diagram of a display device 1300 provided by an embodiment of the present application.
  • FIG. 14 shows a schematic structural diagram of a display device 1400 provided by an embodiment of the present application.
  • FIG. 15 shows a schematic structural diagram of a display device 1500 provided by an embodiment of the present application.
  • FIG. 16 shows a schematic structural diagram of a HUD system 1600 provided by an embodiment of the present application.
  • FIG. 17 shows a schematic structural diagram of a HUD system 1700 provided by an embodiment of the present application.
  • FIG. 18 shows a schematic structural diagram of a HUD system 1800 provided by an embodiment of the present application.
  • FIG. 19 shows a schematic structural diagram of a HUD system 1900 provided by an embodiment of the present application.
  • FIG. 20 shows a schematic structural diagram of a HUD system 2000 provided by an embodiment of the present application.
  • FIG. 21 shows a schematic structural diagram of a HUD system 2100 provided by an embodiment of the present application.
  • FIG. 22 shows a schematic structural diagram of a HUD system 2200 provided by an embodiment of the present application.
  • FIG. 23 shows a schematic structural diagram of a HUD system 2300 provided by an embodiment of the present application.
  • FIG. 24 shows a schematic structural diagram of a HUD system 2400 provided by an embodiment of the present application.
  • FIG. 25 shows a schematic structural diagram of a HUD system 2500 provided by an embodiment of the present application.
  • FIG. 26 shows a schematic structural diagram of a HUD system 2600 provided by an embodiment of the present application.
  • FIG. 27 shows a schematic structural diagram of a HUD system 2700 provided by an embodiment of the present application.
  • FIG. 28 shows a schematic structural diagram of a HUD system 2800 provided by an embodiment of the present application.
  • FIG. 29 shows a schematic circuit diagram of a display device provided by an embodiment of the present application.
  • Fig. 30 shows a schematic diagram of a functional framework of a vehicle provided by an embodiment of the present application.
  • words such as “exemplary” or “for example” are used to represent examples, illustrations or illustrations, and embodiments or designs described as “exemplary” or “for example” should not be interpreted as being more preferred or advantageous than other embodiments or designs.
  • the use of words such as “exemplary” or “for example” is intended to present related concepts in a specific manner for easy understanding.
  • imaging light refers to light carrying an image (or image information) and used to generate an image.
  • the surface shape of the curved mirror is not limited, for example, it may be a free-form mirror.
  • the optical element may also be referred to as an optical device or an optical component.
  • Fig. 1 is a schematic diagram of an application scenario of a HUD device provided by an embodiment of the present application.
  • the HUD device is set on the car.
  • the HUD device is used to project the status information of the vehicle, the indication information of external objects and the navigation information through the windshield of the vehicle in the driver's field of vision.
  • Status information includes, but is not limited to, information such as driving speed, mileage, fuel level, water temperature and lamp status.
  • the indication information of external objects includes, but is not limited to, a safe vehicle distance, surrounding obstacles, and a reversing image.
  • Navigation information includes, but is not limited to, directional arrows, distance, and travel time.
  • the virtual image corresponding to the navigation information and the indication information of external objects can be superimposed on the real environment outside the vehicle, so that the driver can obtain the visual effect of augmented reality, for example, it can be used for augmented reality (augmented reality, AR) navigation, adaptive cruise, lane departure warning, etc.
  • the HUD device usually cooperates with the advanced driving assistant system (ADAS) system of the car.
  • ADAS advanced driving assistant system
  • the virtual image corresponding to the meter information is usually about 2 to 3 meters away from the human eye.
  • the distance between the virtual image corresponding to the navigation information and the human eye is generally about 7 meters to 15 meters.
  • the position where the virtual image of the navigation information is located is called the far focal plane
  • the plane where the virtual image of the instrument information is located is called the near focal plane.
  • the display device can realize a small-sized HUD system, and can avoid structural interference of various vehicle types at the same time, can meet the small-size requirements of the HUD systems of most vehicle types, and achieve a larger field of view (FOV) at a lower cost.
  • FOV field of view
  • FIG. 2 is a schematic structural diagram of a display device 200 provided by an embodiment of the present application.
  • the display device 200 includes a first image source 210 , a second image source 220 , a first curved mirror 230 , a transflective element 240 , and a dust cover 250 .
  • the first image source 210 is located outside the first surface of the first curved mirror 230 (such as the surface 1 in the figure).
  • the first image source 210 is used to generate first imaging light containing first image information, and project the first imaging light to the first surface of the first curved mirror 230 .
  • the second image source 220 is configured to generate the second imaging light containing the second image information, and project the second imaging light to the second surface of the transflective element 240 (such as the surface 2 in the figure).
  • the first curved mirror 230 is used to transmit the first imaging light from its second surface (such as surface 2 among the figures) to the first surface of the transflective element 240 (such as the surface 1 among the figures), and is also used to reflect the first imaging light and the second imaging light from the semi-transparent element 240 to the dust cover 250 at the second surface of the first curved mirror 230.
  • the transflective element 240 is used to reflect the first imaging light on its first surface to the second surface of the first curved mirror 230 , and transmit the second imaging light from the first surface of the transflective element 240 to the second surface of the first curved mirror 230 .
  • the dust cover 250 is used for transmitting the first imaging light and the second imaging light reflected by the first curved mirror 230 .
  • a first polarization conversion device 2401 is further arranged on the optical path between the second surface of the first curved mirror 230 and the first surface of the transflective element 240 .
  • the first polarization conversion device 2401 is used to change the polarization direction of the first imaging light transmitted from the first curved mirror 230, and the polarization direction of the first imaging light reflected from the first surface of the half-reflective element 240, and is also used to change the polarization direction of the second imaging light transmitted from the first surface of the half-reflective element 240.
  • the transflective element 240 may be a plane mirror coated with a transflective film, or other optical elements capable of realizing transflective effect, which is not limited in this application.
  • the first polarization conversion device 2401 may be a quarter-wave plate (quarter-wave plate), and the 1/4 wave plate may be finely processed with a uniaxial birefringent crystal (such as quartz) or a biaxial crystal (such as mica) that is easy to peel.
  • the 1/4 wave plate can be attached on the first surface of the transflective element 240 using optical glue.
  • the first polarization conversion device 2401 may be a film 1/4 wave plate coated on the first surface of the transflective element 240, and may be a polymer organic film 1/4 wave plate, such as polyester film, polypropylene film, etc., which is not limited in this application.
  • a second polarization conversion device 2201 is further arranged on the optical path between the second image source 220 and the second surface of the transflective element 240, and the second polarization conversion device 2201 is used to change the polarization direction of the second imaging light emitted from the second image source 220.
  • the second polarization conversion device 2201 may be a 1/4 wave plate or a thin film 1/4 wave plate, which is not limited in this application.
  • the second polarization conversion device 2201 is a 1/4 wave plate, it can be pasted on the output surface of the second image source 220 by optical glue.
  • the second polarization conversion device 2201 is a thin film 1/4 wave plate, it may be a thin film 1/4 wave plate plated on the exit surface of the second image source 220 .
  • the imaging light projected by the first image source 210 and the second image source 220 may be P polarized light (referred to as P light for short) or S polarized light (referred to as S light for short).
  • P light P polarized light
  • S light S polarized light
  • the first imaging light is converted into circularly polarized light or elliptically polarized light after being transmitted through the first polarization conversion device 2401 .
  • the circularly polarized light or elliptically polarized light is reflected on the first surface of the transflective element 240, it passes through the first polarization conversion device 2401 again and is converted into S light.
  • the second imaging light passes through the second polarization conversion device 2201 once and is converted into circularly polarized light or elliptically polarized light, and then passes through the first polarization conversion device 2401 and then converted into S light, which is reflected by the second surface of the first curved mirror 230 and emerges from the dust cover 250.
  • the human eyes can watch the first image and the second image.
  • the two beams of S light emitted from the dust cover 250 will be reflected by the windshield glass 1720 and finally enter human eyes.
  • the first imaging light emitted from the dust cover 250 generates a first virtual image in human eyes
  • the second imaging light emitted from the dust cover 250 generates a second virtual image in human eyes. Since the optical path of the first imaging light is different from that of the second imaging light, the imaging focal planes of the first virtual image and the second virtual image in human eyes are different.
  • the first virtual image is a far-focus virtual image
  • the second virtual image is a near-focus virtual image.
  • the windshield 1720 can also be pasted with a P-reflective S film.
  • the reflectivity of the first imaging light and the second imaging light on the windshield 1720 can be improved, thereby improving the imaging quality of the first imaging light and the second imaging light in the human eye.
  • the first image source 210 or the second image source 220 may include a light source 310 , a modulation unit 320 and a projection device 330 .
  • the light source 310 is used to provide a light beam carrying image data.
  • the modulation unit 320 is used to modulate the light beam emitted by the light source according to the image data, so that the light output from the modulation unit 320 carries image data, that is, the light output by the modulation unit 320 is imaging light (or called image light).
  • the projection device 330 is used for projecting imaging light carrying image data.
  • the first image source 210 and the second image source 220 may further include a polarization conversion module 340, and the polarization conversion module 340 is used to change the polarization state of the imaging light.
  • the first image source 210 or the second image source 220 may be a liquid crystal on silicon (Liquid Crystal On Silicon, LCOS) display, an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display, a liquid crystal display (Liquid Crystal Display, LCD), a digital light processing (Digital Light Processing, DLP) display or a micro-electro-mechanical system (Micro-Electro-Mechanical Systems, MEMS) displays, etc.
  • LCOS liquid crystal on silicon
  • OLED Organic Light-Emitting Diode
  • LCD Liquid Crystal Display
  • DLP Digital Light Processing
  • MEMS micro-electro-mechanical system
  • the position of the first image source 210 is set outside the first curved mirror 230. Since the curved mirror 230 has a certain curvature, the embodiments of the present application can rationally utilize the space in the display device, thereby reducing the volume of the display device.
  • FIG. 4 shows a schematic structural diagram of a display device 400 provided in the present application.
  • the display device 400 includes a first image source 410 , a second image source 420 , a first curved mirror 430 , a transflective element 440 , and a dust cover 450 .
  • the first image source 410 is located outside the first surface of the first curved mirror 430 .
  • the specific functions of the first image source 410 , the second image source 420 , the first curved mirror 430 , the transflective element 440 , and the dust cover 450 can refer to the description of the corresponding embodiment in FIG. 2 , and will not be repeated here.
  • first polarization conversion device 4401 for the first polarization conversion device 4401, reference may also be made to the related description of the first polarization conversion device 2401 in FIG. 2 , which will not be repeated here.
  • the second polarization conversion device 4202 located on the optical path between the second image source 220 and the second surface of the transflective element 240 may be a 1/4 wave plate attached on the second surface of the transflective element 440 by optical glue, or may be a thin film 1/4 wave plate plated on the second surface of the transflective element 440, which is used to change the polarization direction of the second imaging light.
  • the imaging light projected by the first image source 410 and the second image source 420 may be P light or S light.
  • the structure of the first image source 410 or the second image source 420 can also refer to the description of the first image source 210 or the second image source 220 in FIG. 3 .
  • disposing the second polarization conversion device on the second surface of the transflective element 440 can avoid coating or sticking a film on the surface of the second image source 420 , and has lower requirements on the second image source 420 .
  • FIG. 5 is a schematic structural diagram of a display device 500 provided by an embodiment of the present application.
  • the display device 500 includes a first image source 510 , a second image source 520 , a first curved mirror 530 , a transflective element 540 , a dust cover 550 and an optical element 560 .
  • the display device 500 shown in FIG. 5 adds an optical element 560 to the display device 200 shown in FIG. 2 , and the optical element 560 is used to reflect the second imaging light emitted by the second image source to the second surface of the transflective element.
  • the optical element may be a reflective mirror, a second free-form surface mirror or other optical elements with reflective effect, which is not limited in this application.
  • the first polarization conversion device 5401 is located on the optical path between the second surface of the first curved mirror 530 and the first surface of the transflective element 540 .
  • the first polarization conversion device 5401 is used to change the polarization direction of the first imaging light transmitted from the first curved mirror 230, and the polarization direction of the first imaging light reflected from the first surface of the transflective element 240, and is also used to change the polarization direction of the second imaging light transmitted from the first surface of the transflective element 240.
  • the second polarization conversion device 5201 is located on the optical path between the second image source 520 and the optical element 560 , and the second polarization conversion device 5201 is used to change the polarization direction of the second imaging light emitted from the second image source 520 .
  • the first polarization conversion device 5401 and the second polarization conversion device 5201 may be a 1/4 wave plate or a thin film 1/4 wave plate, which is not limited in this application.
  • the optical path between the second image source 520 and the transflective element 540 can be folded, and the volume of the display device can be further reduced.
  • each part or element in the display device 500 may correspond to the description of the corresponding part or element in FIG. 2 , and will not be repeated here.
  • FIG. 6 is a schematic structural diagram of a display device 600 provided by an embodiment of the present application.
  • the display device 600 includes a first image source 610 , a second image source 620 , a first curved mirror 630 , a transflective element 640 , a dust cover 650 and an optical element 660 .
  • the display device 600 shown in FIG. 6 adds an optical element 660 on the basis of the display device 400 shown in FIG. 4, and the optical element 660 is used for reflecting the second imaging light emitted by the second image source 620 to the second surface of the transflective element 640, and for transmitting the first imaging light transmitted from the second surface of the transflective element 640.
  • the optical element 660 is composed of a third polarization conversion device 6601 and a transmission plate 6602 .
  • the third polarization conversion device 6601 is used to transmit the first imaging light transmitted from the second surface of the transflective element 640, and reflects the second imaging light emitted from the second image source to the second surface of the transflective element
  • the transmission plate 6602 is used to transmit the first imaging light transmitted from the third polarization conversion device 6601.
  • a dual brightness enhancement film can be pasted or plated on the surface of the optical element 6602 according to the polarization characteristics of the first imaging light and the second imaging light.
  • the third polarization conversion device 6601 may be a P-transmitting S-type DBEF.
  • the optical element 660 not only can the optical path between the second image source 620 and the transflective element 640 be folded to further reduce the volume of the display device, but also eliminate stray light in the display device 600, thereby improving the imaging quality.
  • each part or element in the display device 600 may correspond to the description of the corresponding part or element in FIG. 4 , and will not be repeated here.
  • FIG. 7 is a schematic structural diagram of a display device 700 provided by an embodiment of the present application.
  • the display device 700 includes a first image source 710 , a second image source 720 , a first curved mirror 730 , a transflective element 740 , and a dust cover 750 .
  • the first image source 710 is located outside the second surface of the dust cover 750 (such as the surface 2 in the figure).
  • the first image source 710 is used to generate the first imaging light containing the first image information, and project the first imaging light to the second surface of the dust cover 750 .
  • the second image source 720 is configured to generate the second imaging light containing the second image information, and project the second imaging light to the second surface of the transflective element 740 (such as surface 2 in the figure).
  • the half-reflective element 740 is used to reflect the first imaging light to the first surface of the first curved mirror 730 (such as the surface 1 among the figures) on the first surface of the half-reflective element 740 (surface 1 among the figures), and transmit the second imaging light to the first surface of the first curved mirror 730 from the second surface of the half-reflective element 740.
  • the first curved mirror 730 is used to reflect the first imaging light and the second imaging light to the first surface of the dust cover 750 (surface 1 in the figure).
  • the dust cover 750 is used for transmitting the first imaging light emitted by the first image source 710 to the first surface of the transflective element 740 , and for transmitting the first imaging light and the second imaging light reflected by the first curved mirror 730 .
  • a first polarization conversion device 7401 is arranged on the optical path between the dust cover 750 and the first surface of the transflective element 740 .
  • the first polarization conversion device 7401 is used to change the polarization direction of the first imaging light transmitted from the first surface of the dust cover 750, and the polarization direction of the first imaging light reflected from the first surface of the transflective element 740, and is also used to change the polarization direction of the second imaging light transmitted from the first surface of the transflective element 740.
  • the first polarization conversion device 7401 may be a 1/4 wave plate.
  • the 1/4 wave plate can be attached on the first surface of the transflective element 740 using optical glue.
  • the first polarization conversion device 7401 may be a thin film 1/4 wave plate coated on the first surface of the transflective element 740 .
  • a second polarization conversion device 7201 is further arranged on the optical path between the second image source 720 and the second surface of the transflective element 740, and the second polarization conversion device 7201 is used to change the polarization direction of the second imaging light emitted from the second image source 720.
  • the second polarization conversion device 7201 may be a 1/4 wave plate or a film 1/4 wave plate, which is not limited in this application.
  • the second polarization conversion device 7201 is a 1/4 wave plate, it can be pasted on the output surface of the second image source 720 by optical glue.
  • the second polarization conversion device 7201 is a thin film 1/4 wave plate, it may be a thin film 1/4 wave plate plated on the exit surface of the second image source 720 .
  • the imaging light projected by the first image source 710 and the second image source 720 may be P light or S light, which is not limited in this application.
  • the first imaging light is converted into circularly polarized light or elliptically polarized light after being transmitted through the first polarization conversion device 7401 .
  • the circularly polarized light or elliptically polarized light is reflected on the first surface of the transflective element 740, then transmits the first polarization conversion device 7401 again, and is converted into S light, and the S light is reflected by the second surface of the first curved mirror and exits the dust cover 750.
  • the second imaging light passes through the second polarization conversion device 7201 once and then is converted into circularly polarized light or elliptically polarized light, and then passes through the first polarization conversion device 7401 and then converted into S light, which is reflected by the second surface of the first curved mirror and emerges from the dust cover 750.
  • the human eyes can watch the first image and the second image.
  • the second surface of the first curved mirror 730 can also be coated with a transparent P-reflective S film or affixed with a transparent P-reflective S film.
  • the imaging light projected by the first image source 710 and the second image source 720 is P light
  • the first imaging light is converted into S light and incident on the second surface of the first curved mirror 730 after passing through the first polarization conversion device 7401 twice.
  • the second imaging light is converted into circularly polarized light or elliptically polarized light after passing through the second polarization conversion device 7201 once, and then becomes S light after passing through the first deflection conversion device 7401 once and incident on the second surface of the first curved mirror 730 . Therefore, the transparent P-reflective S film on the second surface of the first curved mirror 730 can improve the reflectivity of the first imaging light and the second imaging light, and eliminate stray light in the optical path, thereby improving the imaging quality.
  • the two beams of S light emitted from the dust cover 750 will be reflected by the windshield glass 2120 and finally enter human eyes.
  • the first imaging light emitted from the dust cover 750 generates a first virtual image in human eyes
  • the second imaging light emitted from the dust cover 250 generates a second virtual image in human eyes. Since the optical path of the first imaging light is different from that of the second imaging light, the imaging focal planes of the first virtual image and the second virtual image in human eyes are different.
  • the first virtual image is a far-focus virtual image
  • the second virtual image is a near-focus virtual image.
  • the windshield 2120 can also be pasted with a P-reflective S film.
  • the reflectivity of the first imaging light and the second imaging light on the windshield 2120 can be improved, thereby improving the imaging quality of the first imaging light and the second imaging light in the human eye.
  • the position of the first image source is set outside the dust cover, so it does not need to occupy the space inside the dust cover.
  • the position of the first image source 710 can be flexibly adjusted according to needs, and the space on the IP platform can be fully utilized, which reduces the space occupied by the display device on the vehicle as a whole, facilitates the installation of the display device on vehicles with a small space, and has better adaptability.
  • the polarization direction of the polarized light exiting the dust cover is S light
  • the display device provided by the embodiment of the present application can also expand the display viewing angle.
  • FIG. 8 shows a schematic structural diagram of a display device 800 provided in the present application.
  • the display device 800 includes a first image source 810 , a second image source 820 , a first curved mirror 830 , a transflective element 840 , and a dust cover 850 .
  • the first image source 810 is located outside the second surface of the dust cover 850 (such as the surface 2 in the figure).
  • the second image source 820, the first curved mirror 830, the transflective element 840, and the dust cover 850 please refer to the description of the corresponding parts in FIG. 7 , which will not be repeated here.
  • first polarization conversion device 8401 for the first polarization conversion device 8401, reference may also be made to the relevant description of the first polarization conversion device 8401 in FIG. 7 , which will not be repeated here.
  • the second polarization conversion device 8402 located on the optical path between the second image source 820 and the second surface of the transflective element 840 may be a 1/4 wave plate attached to the second surface of the transflective element 840 through optical glue, or may be a thin film 1/4 wave plate plated on the second surface of the transflective element 840 to change the polarization direction of the second imaging light.
  • the imaging light projected by the first image source 810 and the second image source 820 may be P polarized light (referred to as P light for short) or S polarized light (referred to as S light for short).
  • P light P polarized light
  • S light S polarized light
  • the second imaging light projected by the second image source 820 is P light
  • the second imaging light is converted into circularly polarized light or elliptically polarized light after being transmitted through the second polarization conversion device 8402 .
  • the circularly polarized light or elliptically polarized light is transmitted through the transflective element 840 , and then transmitted through the first polarization conversion device 8401 to be converted into S light.
  • the S light is reflected by the second surface of the first curved mirror 830 and exits the dust cover 850 .
  • FIG. 9 is a schematic structural diagram of a display device 900 provided by an embodiment of the present application.
  • the display device 900 includes a first image source 910 , a second image source 920 , a first curved mirror 930 , a transflective element 940 , and a dust cover 950 .
  • the first image source 910 is located outside the second surface of the dust cover 950 (such as the surface 2 in the figure).
  • the first image source 910 is used to generate first imaging light containing first image information, and project the first imaging light to the second surface of the dust cover 950 .
  • the second image source 920 is configured to generate the second imaging light containing the second image information, and project the second imaging light to the second surface of the transflective element 940 (such as surface 2 in the figure).
  • the half-reflective element 940 is used to reflect the first imaging light to the first surface of the first curved mirror 930 (such as the surface 1 among the figures) on the first surface of the half-reflective element 940 (surface 1 among the figures), and to transmit the second imaging light from the second surface of the half-reflective element 940 to the first surface of the first curved mirror 930.
  • the first curved mirror 930 is used to reflect the first imaging light and the second imaging light to the first surface of the dust cover 950 (surface 1 in the figure).
  • the dust cover 950 is used for transmitting the first imaging light emitted by the first image source 910 to the first surface of the transflective element 940 , and for transmitting the first imaging light and the second imaging light reflected by the first curved mirror 930 .
  • a first polarization conversion device 9501 is disposed on the dustproof cover 950 .
  • the first polarization conversion device 9501 is used to change the polarization direction of the first imaging light transmitted from the first surface of the dust cover 950 , and the polarization directions of the first imaging light and the second imaging light reflected from the first surface of the first curved mirror 930 .
  • the first polarization conversion device 9501 is located on the first surface of the dust cover 950 .
  • the first polarization converting device 9501 and the second polarizing device 9201 may be a 1/4 wave plate or a thin film 1/4 wave plate. Specifically, reference may be made to the relevant description in FIG. 7 above, which will not be repeated here.
  • the first polarization conversion device 9501 may also be located on the second surface of the dust cover 950 .
  • the imaging light projected by the first image source 910 and the second image source 920 may be P light or S light, which is not limited in this application.
  • the first imaging light projected by the first image source 910 and the second imaging light projected by the second image source 920 are both P light
  • the first imaging light is transmitted through the first polarization conversion device 9501 and converted into circularly polarized light or elliptically polarized light, and after being reflected by the first surface of the transflective element 940 and the first surface of the first curved mirror 930, it is transmitted again through the first polarization conversion device 9501 and converted into S light, and then exits from the dust cover 950.
  • the second imaging light is transmitted through the second polarization conversion device 9201, converted into circularly polarized light or elliptically polarized light, transmitted through the transflective element 940, reflected on the first surface of the first curved mirror 930, and then transmitted through the first polarization conversion device 9501, converted into S light, and emitted from the dust cover 950.
  • first image source 910 or the second image source 920 reference may be made to the description of the first image source 210 or the second image source 220 shown in FIG. 3 , which will not be repeated here.
  • FIG. 10 is a schematic structural diagram of a display device 1000 provided by an embodiment of the present application.
  • the display device 1000 includes a first image source 1010 , a second image source 1020 , a first curved mirror 1030 , a transflective element 1040 , and a dust cover 1050 .
  • the structures of the first image source 1010, the second image source 1020, the first curved mirror 1030, the transflective element 1040, and the dustproof cover 1050 are similar to the structures of the first image source 910, the second image source 920, the first curved mirror 930, the semitransparent element 940, and the dustproof cover 950 of the above-mentioned embodiment in FIG.
  • a first polarization conversion device 1031 is disposed on the first surface of the first curved mirror 1030 .
  • the first polarization conversion device 1031 is used to change the polarization direction of the first imaging light reflected from the first surface of the transflective element 1040, and the polarization direction of the second imaging light transmitted from the first surface of the transflective element 1040, and is also used to change the polarization direction of the first imaging light and the second imaging light reflected from the first surface of the first curved mirror 1030.
  • the first polarization conversion device 1031 may be a 1/4 wave plate or a thin film 1/4 wave plate. When the first polarization conversion device 1031 is a 1/4 wave plate, it may be pasted on the first surface of the first curved mirror 1030 with optical glue. When the first polarization conversion device 7401 is a thin film 1/4 wave plate, it may be coated on the first surface of the first curved mirror 1030 .
  • the imaging light projected by the first image source 1010 and the second image source 1020 may be P light or S light, which is not limited in this application.
  • the first imaging light projected by the first image source 1010 and the second imaging light projected by the second image source 1020 are both P light
  • the first imaging light first transmits through the dust cover 1050 and then transmits to the transflective element 1040, after being reflected by the first surface of the transflective element 1040, it passes through the first polarization conversion device 1031 once, and is converted into circularly polarized light or elliptically polarized light, and then transmits the first polarization conversion device again after being reflected by the first surface of the first curved mirror 930 9501, converted into S light, emitted from the dust cover 950.
  • the second imaging light first passes through the transflective element 1040, then passes through the first polarization conversion device 1031 once, and is converted into circularly polarized light or elliptically polarized light, is reflected by the first surface of the first curved mirror 930, and then transmits through the first polarization conversion device 9501 again, converted into S light, and exits from the dust cover 950.
  • the display device 1000 provided in the embodiment of the present application only includes one polarization conversion device, which can save costs.
  • FIG. 11 is a schematic structural diagram of a display device 1100 provided by an embodiment of the present application.
  • the display device 1100 includes a first image source 1110 , a second image source 1120 , a first curved mirror 1130 , a transflective element 1140 , a dust cover 1150 and an optical element 1160 .
  • the display device 1100 shown in FIG. 11 adds an optical element 1160 on the basis of the display device 700 shown in FIG. 7 , and the optical element 1160 is used to reflect the second imaging light emitted by the second image source to the second surface of the transflective element.
  • the optical element may be a reflective mirror, a second free-form surface mirror or other optical elements with reflective effect, which is not limited in this application.
  • the optical path between the second image source 1120 and the transflective element 1140 can be folded, which can further reduce the volume of the display device.
  • each part or element in the display device 1100 may correspond to the description of the corresponding part or element in FIG. 7 , and will not be repeated here.
  • FIG. 12 is a schematic structural diagram of a display device 1200 provided by an embodiment of the present application.
  • the display device 1200 includes a first image source 1210 , a second image source 1220 , a first curved mirror 1230 , a transflective element 1240 , a dust cover 1250 and an optical element 1260 .
  • the display device 1200 shown in FIG. 12 adds an optical element 1260 on the basis of the display device 800 shown in FIG. 8, and the optical element 1260 is used to reflect the second imaging light emitted by the second image source to the second surface of the transflective element, and to transmit the first imaging light transmitted from the second surface of the transflective element 1240.
  • the structure, function and function of the optical element 1260 can refer to the optical element 660 in FIG. 6 , and will not be repeated here.
  • the function of each part or element in the display device 1200 may correspond to the description of the corresponding part or element in FIG. 8 , and will not be repeated here.
  • FIG. 13 is a schematic structural diagram of a display device 1300 provided by an embodiment of the present application.
  • the display device 1300 includes a first image source 1310 , a second image source 1320 , a first curved mirror 1330 , a transflective element 1340 , a dust cover 1350 and an optical element 1360 .
  • the display device 1300 shown in FIG. 13 adds an optical element 1360 on the basis of the display device 900 shown in FIG. 9 , and the optical element 1360 is used to reflect the second imaging light emitted by the second image source to the second surface of the transflective element.
  • the optical element may be a reflective mirror, a second free-form surface mirror or other optical elements with reflective effect, which is not limited in this application.
  • the optical path between the second image source 1320 and the transflective element 1340 can be folded, and the volume of the display device can be further reduced.
  • each part or element in the display device 1300 may correspond to the description of the corresponding part or element in FIG. 9 , and will not be repeated here.
  • FIG. 14 is a schematic structural diagram of a display device 1400 provided by an embodiment of the present application.
  • the display device 1400 includes a first image source 1410 , a second image source 1420 , a first curved mirror 1430 , a transflective element 1440 , a dust cover 1450 and an optical element 1460 .
  • the display device 1400 shown in FIG. 14 is based on the display device 1000 shown in FIG. 10 by adding an optical element 1460, and the optical element 1460 is used to reflect the second imaging light emitted by the second image source to the second surface of the transflective element.
  • the optical element may be a reflective mirror, a second free-form surface mirror or other optical elements with reflective effect, which is not limited in this application.
  • the optical element 1460 can fold the optical path between the second image source 1420 and the transflective element 1440, which can further reduce the volume of the display device.
  • each part or element in the display device 1400 may correspond to the description of the corresponding part or element in FIG. 10 , and will not be repeated here.
  • FIG. 15 is a schematic structural diagram of a display device 1500 provided by an embodiment of the present application.
  • the display device 1500 includes a first image source 1510 , a second image source 1520 , a first curved mirror 1530 , a transflective element 1540 , and a dust cover 1550 .
  • the structures of the first image source 1510, the second image source 1520, the first curved mirror 1530, the transflective element 1540, and the dustproof cover 1550 are similar to the structures of the first image source 1410, the second image source 1420, the first curved mirror 1430, the semitransparent element 1440, and the dustproof cover 1450 in the embodiment of FIG.
  • a first polarization conversion device 1541 is provided on the optical path between the dust cover 1550 and the first surface of the transflective element 1540 .
  • the first polarization conversion device 1541 is used to change the polarization direction of the first imaging light transmitted from the first surface of the dust cover 1550, the polarization direction of the first imaging light reflected from the first surface of the transflective element 1540, and also used to change the polarization direction of the second imaging light transmitted from the second surface of the first curved mirror 1530, and the polarization direction of the second imaging light reflected from the first surface of the transflective element 1540.
  • the first polarization conversion device 1541 can be a 1/4 wave plate attached on the first surface of the transflective element 1540 using optical glue, or a film 1/4 wave plate plated on the first surface of the transflective element 1540.
  • the imaging light projected by the first image source 1510 and the second image source 1520 may be P light or S light, which is not limited in this application. Specifically, when the imaging light projected by the first image source 1510 and the second image source 1520 is P light, the first imaging light and the second imaging light are converted into circularly polarized light or elliptically polarized light after being transmitted through the first polarization conversion device 1541 .
  • the two beams of circularly polarized light or elliptically polarized light are reflected on the first surface of the transflective element 1540, and then transmit through the first polarization conversion device 1541 again, converted into S light, and then reflected by the second surface of the first curved mirror 1530 to emerge from the dust cover 1550.
  • the human eyes can watch the first image and the second image.
  • the second surface of the first curved mirror 1530 may also be coated with a P-reflective S film or attached with a P-reflective S film to eliminate stray light in the optical path, thereby improving the imaging quality.
  • an optical element can be placed on the optical path between the first curved mirror 1530 and the half-reflective element 1540.
  • the optical element can be a mirror or an optical element with a reflective function, and is used to fold the optical path between the first curved mirror 1530 and the half-reflective element 1540, which can further reduce the volume of the display device.
  • FIG. 16 is a schematic diagram of an overall system in which the above-mentioned display device of FIG. 2 is applied in a HUD.
  • FIG. 17 is a schematic diagram of an overall system in which the display device of FIG. 4 is applied to a HUD.
  • 18 to 28 respectively correspond to schematic diagrams of an overall system in which the display device shown in FIG. 5 to FIG. 15 is applied to a HUD.
  • the small-volume display device provided by the present application can realize images of bifocal planes.
  • the description of the system embodiment and the description of the device embodiment may correspond to each other, therefore, the parts not described may refer to the foregoing device embodiment.
  • FIG. 29 is a schematic circuit diagram of a display device provided by an embodiment of the present application.
  • the circuits in the display device mainly include a main processor (host CPU) 3101, an external memory interface 3102, an internal memory 3103, an audio module 3104, a video module 3105, a power supply module 3106, a wireless communication module 3107, an I/O interface 3108, a video interface 3109, a display circuit 3110, and a modulator 3131.
  • the main processor 3101 and its peripheral components such as an external memory interface 3102, an internal memory 3103, an audio module 3104, a video module 3105, a power module 3106, a wireless communication module 3107, an I/O interface 3108, a video interface 3109, and a display circuit 3110 can be connected through a bus.
  • the main processor 3101 may be called a front-end processor.
  • circuit diagrams shown in the embodiments of the present application do not constitute specific limitations on the display device.
  • the display device may include more or fewer components than shown in the illustrations, or combine certain components, or separate certain components, or arrange different components.
  • the illustrated components can be realized in hardware, software or a combination of software and hardware.
  • the main processor 3101 includes one or more processing units, for example: the main processor 3101 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 (Neur al-Network Processing Unit, NPU), etc.
  • different processing units may be independent devices, or may be integrated in one or more processors.
  • a memory may also be provided in the main processor 3101 for storing instructions and data.
  • the memory in the main processor 3101 is a cache memory.
  • the memory can hold instructions or data that the main processor 3101 has just used or recycled. If the main processor 3101 needs to use the instruction or data again, it can be called directly from the memory. Repeated access is avoided, and the waiting time of the main processor 3101 is reduced, thus improving the efficiency of the system.
  • the display device may further include a plurality of input/output (Input/Output, I/O) interfaces 3108 connected to the main processor 3101 .
  • the interface 3108 may include 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 transceiver (Universal Asynchronous Receiver/Transmitter, UART) interface, a mobile industry processor interface (Mobile Industry Processor Interface) , MIPI), General-Purpose Input/Output (GPIO) interface, Subscriber Identity Module (SIM) interface, and/or Universal Serial Bus (Universal Serial Bus, USB) interface, Controller Area Network (Controller Area Network, CAN) interface, etc.
  • I2C Inter-Integrated Circuit
  • I2S integrated circuit built-in audio
  • PCM pulse code modulation
  • PCM pulse code modulation
  • UART Universal Asynchronous Receiver/Transmit
  • the above-mentioned I/O interface 3108 can be connected to devices such as a mouse, a touchpad, a keyboard, a camera, a speaker/speaker, and a microphone, and can also be connected to physical buttons on a display device (such as volume buttons, brightness adjustment buttons, power-on/off buttons, etc.).
  • the external memory interface 3102 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the display device.
  • the external memory card communicates with the main processor 3101 through the external memory interface 3102 to realize the data storage function.
  • the internal memory 3103 may be used to store computer-executable program codes including instructions.
  • the internal memory 3103 may include an area for storing programs and an area for storing data.
  • the stored program area can store an operating system, at least one application program required by a function (such as a call function, a time setting function, etc.) and the like.
  • the storage data area can store data created during the use of the display device (such as phonebook, world time, etc.) and the like.
  • the internal memory 3103 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (Universal Flash Storage, UFS) and the like.
  • the main processor 3101 executes various functional applications and data processing of the display device by executing instructions stored in the internal memory 3103 and/or instructions stored in the memory provided in the main processor 3101 .
  • the display device may implement audio functions through the audio module 3104 and the application processor. Such as music playback, calls, etc.
  • the audio module 3104 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signal.
  • the audio module 3104 can also be used for encoding and decoding audio signals, such as playing or recording.
  • the audio module 3104 can be set in the main processor 3101 , or some functional modules of the audio module 3104 can be set in the main processor 3101 .
  • Video interface 3109 can receive the audio-video signal of external input, and it specifically can be high-definition multimedia interface (High Definition Multimedia Interface, HDMI), digital video interface (Digital Visual Interface, DVI), video graphics array (Video Graphics Array, VGA), display port (Display port, DP) etc., video interface 3109 can also export video outwards.
  • the video interface 3109 can receive speed signals and power signals input from peripheral equipment, and can also receive AR video signals input from outside.
  • the video interface 3109 can receive video signals input from an external computer or terminal equipment.
  • the video module 3105 can decode the video input by the video interface 3109, for example, perform H.264 decoding.
  • the video module can also encode the video captured by the display device, for example, perform H.264 encoding on the video captured by the external camera.
  • the main processor 3101 can also decode the video input from the video interface 3109, and then output the decoded image signal to the display circuit 3110.
  • the display circuit 3110 and the modulator 3111 are used to display corresponding images.
  • the video interface 3109 receives an externally input video source signal, and the video module 3105 performs decoding and/or digital processing to output one or more image signals to the display circuit 3110, and the display circuit 3110 drives the modulator 3111 to image the incident polarized light according to the input image signal, and then outputs at least two imaging lights.
  • the main processor 3101 can also output one or more image signals to the display circuit 3110 .
  • the display circuit 3110 and the modulator 3131 belong to the electronic components in the modulation unit 320 shown in FIG. 3 , and the display circuit 3110 may be called a driving circuit.
  • the power module 3106 is used to provide power to the main processor 3101 and the light source 3100 according to the input power (such as direct current).
  • the light emitted by the light source 3100 may be transmitted to the modulator 3111 for imaging, thereby forming an image light signal.
  • the wireless communication module 3107 can enable the display device to perform wireless communication with the outside world, which can provide wireless local area network (Wireless Local Area Networks, WLAN) (such as wireless fidelity (Wireless Fidelity, Wi-Fi) network), Bluetooth (Bluetooth, BT), global navigation satellite system (Global Navigation Satellite System, GNSS), frequency modulation (Frequency Modulation, FM), short-range wireless communication technology (Near Field Communication, NFC), infrared technology (Infrared, IR) and other wireless communication solutions.
  • the wireless communication module 3107 may be one or more devices integrating at least one communication processing module.
  • the wireless communication module 3107 receives electromagnetic waves through the antenna, frequency-modulates and filters the electromagnetic wave signals, and sends the processed signals to the main processor 3101 .
  • the wireless communication module 3107 can also receive the signal to be sent from the main processor 3101, frequency-modulate it, amplify it, and convert it into electromagnetic wave and radiate it through the antenna.
  • the video data decoded by the video module 3105 can also be received wirelessly through the wireless communication module 3107 or read from an external memory.
  • the display device can receive video data from a terminal device or a vehicle entertainment system through a wireless local area network in the car, and the display device can also read audio and video data stored in the external memory.
  • FIG. 30 is a schematic diagram of a possible functional framework of a vehicle provided by an embodiment of the present application.
  • various subsystems may be included in the functional framework of the vehicle, such as the sensor system 12 shown in the figure, the control system 14, one or more peripheral devices 16 (one is shown as an example), the power supply 18, the computer system 20 and the display system 22.
  • the vehicle may also include other functional systems, such as an engine system for powering the vehicle, etc., which are not limited in this application.
  • the sensor system 12 may include several detection devices, which can sense the measured information and convert the sensed information into electrical signals or other required forms of information output according to certain rules.
  • these detection devices may include 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, a camera, a wheel speed sensor, a steering sensor, a gear sensor, or other components for automatic detection, etc., and the present application is not limited thereto.
  • the control system 14 may include several elements such as the illustrated steering unit, braking unit, lighting system, automatic driving system, map navigation system, network time synchronization system and obstacle avoidance system.
  • the control system 14 may also include components such as an accelerator controller and an engine controller for controlling the driving speed of the vehicle, which are not limited in this application.
  • Peripherals 16 may include elements such as a communication system, a touch screen, a user interface, a microphone, and speakers as shown, among others.
  • the communication system is used to realize the network communication between the vehicle and other devices except the vehicle.
  • the communication system can use wireless communication technology or wired communication technology to realize network communication between vehicles and other devices.
  • the wired communication technology may refer to communication between the vehicle and other devices through network cables or optical fibers.
  • Power source 18 represents a system that provides electrical power or energy to the vehicle, which may include, but is not limited to, a rechargeable lithium or lead-acid battery, or the like. In practical applications, one or more battery components in the power supply are used to provide electric energy or energy for starting the vehicle, and the type and material of the power supply are not limited in this application.
  • the computer system 20 may include one or more processors 2001 (one processor is used as an example in the figure) and a memory 2002 (also called a storage device).
  • processors 2001 one processor is used as an example in the figure
  • memory 2002 also called a storage device
  • the memory 2002 is also inside the computer system 20, or outside the computer system 20, for example, as a buffer in a vehicle, which is not limited in this application. in,
  • the processor 2001 may include one or more general-purpose processors, such as a graphics processing unit (graphic processing unit, GPU).
  • the processor 2001 can be used to run related programs stored in the memory 2002 or instructions corresponding to the programs, so as to realize corresponding functions of the vehicle.
  • the memory 2002 can include a volatile memory (volatile memory), such as RAM; the memory can also include a non-volatile memory (non-volatile memory), such as ROM, flash memory (flash memory), HDD or solid-state disk SSD; the memory 2002 can also include a combination of the above-mentioned types of memory.
  • the memory 2002 can be used to store a set of program codes or instructions corresponding to the program codes, so that the processor 2001 calls the program codes or instructions stored in the memory 2002 to realize corresponding functions of the vehicle.
  • a set of program codes for vehicle control can be stored in the memory 2002, and the processor 2001 calls the program codes to control the safe driving of the vehicle. How to realize the safe driving of the vehicle will be described in detail below in this application.
  • the memory 2002 can also store information such as road maps, driving routes, and sensor data.
  • the computer system 20 can combine other components in the vehicle functional framework diagram, such as sensors in the sensor system, GPS, etc., to realize related functions of the vehicle.
  • the computer system 20 can control the driving direction or driving speed of the vehicle based on the data input from the sensor system 12 , which is not limited in this application.
  • the display system 22 can display image information, such as displaying navigation information, playing video and so on.
  • image information such as displaying navigation information, playing video and so on.
  • FIG. 30 of the present application shows that there are four subsystems, and the sensor system 12, the control system 14, the computer system 20 and the display system 22 are only examples and do not constitute limitations.
  • vehicles can combine several components in the vehicle according to different functions, so as to obtain subsystems with corresponding different functions.
  • the vehicle may include more or less systems or elements, which is not limited in this application.
  • the above means of transportation can be cars, trucks, motorcycles, buses, ships, airplanes, helicopters, lawn mowers, recreational vehicles, playground vehicles, construction equipment, trams, golf carts, trains, and trolleys, etc., which are not particularly limited in the embodiments of the present application.

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Abstract

提供了一种显示装置（200）和交通工具。显示装置（200）包括：第一像源（210）、第二像源（220）、第一曲面镜（230）、半透半反元件（240）、防尘罩（250）。其中，第一像源（210），用于生成包含第一图像信息的第一成像光，并向第一曲面镜（230）投射第一成像光。第一曲面镜（230），用于透射第一成像光至半透半反元件（240），还用于反射来自半透半反元件（240）的第一成像光和第二成像光至防尘罩（250）。第二像源（220），用于生成包含第二图像信息的第二成像光，并向半透半反元件（240）投射第二成像光。半透半反元件（240），用于反射第一成像光至第一曲面镜（230），以及透射第二成像光至第一曲面镜（230）。防尘罩（250），用于透射第一曲面镜（230）反射的第一成像光和第二成像光。第一像源（210）位于第一曲面镜（230）的外侧。这种显示装置（200），能够实现小尺寸大视场角多图像显示。

Description

一种显示装置和交通工具
本申请要求于2022年1月21日提交中国国家知识产权局、申请号202210074276.9、申请名称为“一种显示装置和交通工具”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及图像显示领域，并且，更具体地，涉及一种显示装置和交通工具。
背景技术
随着抬头显示器(head up display，HUD)被广泛的应用于汽车，如何减小HUD体积，实现小尺寸HUD装置成为亟待解决的问题。
发明内容
本申请提供一种显示装置和交通工具，本申请提供的显示装置能够应用于HUD，并减小HUD的体积。
第一方面，本申请实施例提供了一种显示装置。该装置包括：第一像源、第二像源、第一曲面镜、半透半反元件以及防尘罩。其中，所述第一像源，用于生成包含第一图像信息的第一成像光，并向所述第一曲面镜的第一表面投射所述第一成像光。所述第一曲面镜，用于从所述第一曲面镜的第二表面透射所述第一成像光至所述半透半反元件的第一表面，还用于在所述第一曲面镜的第二表面反射来自所述半透半反元件的所述第一成像光和第二成像光至所述防尘罩。所述第二像源，用于生成包含第二图像信息的第二成像光，并向所述半透半反元件的第二表面投射所述第二成像光。所述半透半反元件，用于在所述半透半反元件的第一表面反射所述第一成像光至所述第一曲面镜的第二表面，以及从所述半透半反元件的第一表面透射所述第二成像光至所述第一曲面镜的第二表面。所述防尘罩，用于透射所述第一曲面镜反射的所述第一成像光和所述第二成像光。所述第一像源位于所述第一曲面镜的第一表面的外侧。
示例性地，该半透半反元件可以是镀有半透半反膜的平面镜，或者其他能够实现半透半反作用的光学元件。
基于本申请提供的方案，本申请提供的显示装置中，将第一像源放置在第一曲面镜的外侧，可以通过利用曲面镜后侧的空间来实现缩小显示装置体积的效果。
结合第一方面，在第一方面的某些实现方式中，所述装置还包括：光学元件。所述光学元件，用于将所述第二像源出射的所述第二成像光反射至所述半透半反元件的第二表面。
示例性地，该光学元件可以是反射镜或者自由曲面镜或者其他具有反射光路的光学元件等。
基于该方案，利用光学元件折叠第二像源至半透半反元件之间的光路，能够进一步减小 显示装置的体积。
结合第一方面，在第一方面的某些实现方式中，所述装置还包括：第一偏振转换器件。所述第一偏振转换器件位于所述第一曲面镜和所述半透半反元件之间的光路上，用于改变从所述第一曲面镜透射的所述第一成像光的偏振方向，以及从所述半透半反元件的第一表面反射的所述第一成像光的偏振方向，还用于改变从所述半透半反元件的第一表面透射的所述第二成像光的偏振方向。
结合第一方面，在第一方面的某些实现方式中，所述第一偏振转换器件位于所述半透半反元件的第一表面上。
结合第一方面，在第一方面的某些实现方式中，所述装置还包括：第二偏振转换器件。所述第二偏振转换器件位于所述第二像源和所述半透半反元件之间的光路上，用于改变从所述第二像源的出射的所述第二成像光的偏振方向。
结合第一方面，在第一方面的某些实现方式中，所述第二偏振转换器件位于所述第二像源的出射表面上或者所述半透半反元件的第二表面上。
结合第一方面，在第一方面的某些实现方式中，所述光学元件还用于透射从所述半透半反元件的第二表面透射的所述第一成像光，其中，所述第二偏振转换器件位于所述半透半反元件的第二表面上。
结合第一方面，在第一方面的某些实现方式中，所述光学元件包括第三偏振转换器件和透射平板。所述第三偏振转换器件用于透射从所述半透半反元件的第二表面透射的所述第一成像光，并反射从所述第二像源出射的所述第二成像光，所述透射平板用于透射所述第三偏振转换器件透射的所述第一成像光。
在本申请实施例中，根据第三偏振转换器件的作用，也可以将该第三偏振转换器件称为透反元件，用于透射特定偏振方向的偏振光，并反射另一个偏振方向的偏振光。例如，可以用于透射S光，反射P光。
基于上述方案，本申请提供的显示装置能够通过第三偏振转换器件消除内部杂散光，从而提供成像质量。
结合第一方面，在第一方面的某些实现方式中，所述第一偏振转换器件和所述第二偏振转换器件为1/4波片。
结合第一方面，在第一方面的某些实现方式中，从所述防尘罩透射的所述第一成像光和所述第二成像光的偏振方向相同。
结合第一方面，在第一方面的某些实现方式中，所述第一像源出射的所述第一成像光为偏振光，所述第二像源出射的所述第二成像光为偏振光，所述偏振光为P光或S光。
结合第一方面，在第一方面的某些实现方式中，所述第一像源出射的所述第一成像光和所述第二像源出射的所述第二成像光为P光。
结合第一方面，在第一方面的某些实现方式中，所述第一曲面镜的第一表面镀有透P反S膜或贴有透P反S膜。
其中，该透P反S膜可以双增亮膜(dual brightness enhancement film，DBEF)。
基于上述方案，本申请提供的实施例，可以设定显示装置的出射光为S光，利用S偏振光实现大视场角的显示装置。
第二方面，本申请实施例提供了一种显示装置。该装置包括：第一像源、第二像源、第 一曲面镜、半透半反元件以及防尘罩。其中，所述第一像源，用于生成包含第一图像信息的第一成像光，并向所述防尘罩投射所述第一成像光。所述第二像源，用于生成包含第二图像信息的第二成像光，并向所述半透半反元件的第二表面投射所述第二成像光。所述防尘罩，用于透射所述第一成像光至所述半透半反元件的第一表面。所述半透半反元件，用于在所述半透半反元件的第一表面反射所述第一成像光至所述第一曲面镜的第一表面，以及从所述半透半反元件的第二表面透射所述第二成像光至所述第一曲面镜的第一表面。所述第一曲面镜，用于反射所述第一成像光和第二成像光至所述防尘罩。所述防尘罩还用于透射所述第一曲面镜反射的所述第一成像光和所述第二成像光到所述防尘罩外面。所述第一像源位于所述防尘罩的外侧。
在一种可能的实现方式中，当该显示装置应用于HUD系统时，该第一像源可以放置于HUD系统中遮光板的位置，替代遮光板遮挡阳光的功能。
基于上述方案，将第一像源的位置放置于防尘罩的外侧，例如，遮光板的位置处，能够减小HUD系统的体积，使得该HUD系统可以与更多的车型适配。
结合第二方面，在第二方面的某些实现方式中，所述装置还包括：光学元件。所述光学元件，用于将所述第二像源出射的所述第二成像光反射至所述半透半反元件的第二表面。
基于上述方案，本申请实施例通过光学元件折叠第二像源与透半反膜之间的光路，能够进一步缩小显示装置的体积。
结合第二方面，在第二方面的某些实现方式中，所述装置还包括：第一偏振转换器件。所述第一偏振转换器件位于所述防尘罩和所述半透半反元件之间的光路上，用于改变从所述防尘罩透射的所述第一成像光的偏振方向，以及从所述半透半反元件的第一表面反射的所述第一成像光的偏振方向，还用于改变从所述半透半反元件的第一表面透射的所述第二成像光的偏振方向。
结合第二方面，在第二方面的某些实现方式中，所述第一偏振转换器件位于所述半透半反元件的第一表面上。
结合第二方面，在第二方面的某些实现方式中，所述装置还包括：第一偏振转换器件。所述第一偏振转换器件位于所述第一曲面镜与所述防尘罩之间的光路上，用于改变从所述防尘罩透射的所述第一成像光的偏振方向，以及从所述第一曲面镜的第一表面反射的所述第一成像光和所述第二成像光的偏振方向。
结合第二方面，在第二方面的某些实现方式中，所述第一偏振转换器件位于所述防尘罩内侧表面上。
结合第二方面，在第二方面的某些实现方式中，所述装置还包括：第一偏振转换器件。所述第一偏振转换器件位于所述第一曲面镜与所述防尘罩之间的光路上，用于改变从所述第一像源出射的所述第一成像光的偏振方向，以及从所述第一曲面镜的第一表面反射的所述第一成像光和所述第二成像光的偏振方向。
结合第二方面，在第二方面的某些实现方式中，所述第一偏振转换器件位于所述防尘罩的外侧表面上。
结合第二方面，在第二方面的某些实现方式中，所述装置还包括：第二偏振转换器件。所述第一偏振转换器件位于所述第二像源和所述半透半反元件之间的光路上，用于改变从所述第二像源的出射的所述第二成像光的偏振方向。
结合第二方面，在第二方面的某些实现方式中，所述第二偏振转换器件位于所述第二像源的出射表面上或者所述半透半反元件的第二表面上。
结合第二方面，在第二方面的某些实现方式中，所述光学元件还用于透射从所述半透半反元件的第二表面透射的所述第一成像光，其中，所述第二偏振转换器件位于所述半透半反元件的第二表面上。
结合第二方面，在第二方面的某些实现方式中，所述光学元件包括第三偏振转换器件和透射平板。所述第三偏振转换器件用于透射从所述半透半反元件的第二表面透射的所述第一成像光，并反射所述第二像源出射的所述第二成像光，所述透射平板用于透射所述第三偏振转换器件透射的所述第一成像光。
基于上述方案，本申请实施例提供的第三偏振转换器件能够实现对特定偏振光反射，对其他偏振光透射的效果，从而能够减少显示装置中的杂散光，进而提高成像质量。
结合第二方面，在第二方面的某些实现方式中，所述第一偏振转换器件和所述第二偏振转换器件为1/4波片。
结合第二方面，在第二方面的某些实现方式中，所述装置还包括：第一偏振转换器件。所述第一偏振转换器件位于所述半透半反元件和所述第一曲面镜之间的光路上，用于改变从所述半透半反元件的第一表面反射的所述第一成像光的偏振方向，以及从所述半透半反元件的第一表面透射的所述第二成像光的偏振方向，还用于改变从所述第一曲面镜的第一表面反射的所述第一成像光和所述第二成像光的偏振方向。
结合第二方面，在第二方面的某些实现方式中，所述第一偏振转换器件位于所述第一曲面镜的第一表面上。
结合第二方面，在第二方面的某些实现方式中，所述第一偏振转换器件为1/4波片。
结合第二方面，在第二方面的某些实现方式中，从所述防尘罩出射所述第一成像光和所述第二成像光的偏振方向相同。
结合第二方面，在第二方面的某些实现方式中，所述第一像源出射的所述第一成像光为偏振光，所述第二像源出射的所述第二成像光为偏振光，所述偏振光包括P光和S光。
结合第二方面，在第二方面的某些实现方式中，所述第一像源出射的所述第一成像光和所述第二像源出射的所述第二成像光为P光。
基于上述方案，第一像源和第二像源出射相同偏振方向的光(例如P光)，使得最终成像的光束的偏振方向为S光。由于S光的反射率会随入射角度的增大而变大，因此，本申请提供的实施例，能够增大显示装置的视场角。当本申请提供的显示装置应用于HUD系统时，能够满足更多的车型需求。
第三方面，本申请实施例提供了一种显示装置。该装置包括：第一像源、第二像源、第一曲面镜、半透半反元件以及防尘罩。其中，所述第一像源，用于生成包含第一图像信息的第一成像光，并向所述防尘罩投射所述第一成像光。所述第二像源，用于生成包含第二图像信息的第二成像光，并向所述第一曲面镜的第一表面投射所述第二成像光。所述第一曲面镜，用于从所述第一曲面镜的第二表面透射所述第二成像光至所述半透半反元件的第一表面，以及反射所述第一成像光和第二成像光至所述防尘罩。所述半透半反元件，用于在所述半透半反元件的第一表面反射所述第一成像光至所述第一曲面镜的第一表面，以及在所述半透半反元件的第一表面反射所述第二成像光至所述第一曲面镜的第一表面。所述防尘罩，用于透射 所述第一成像光至所述半透半反元件的第一表面，以及透射所述第一曲面镜反射的所述第一成像光和所述第二成像光到所述防尘罩外面。所述第一像源位于所述防尘罩的外侧，所述第二像源位于所述第一曲面镜的第一表面的外侧。
结合第三方面，在第三方面的某些实现方式中，所述装置还包括：光学元件。所述光学元件，用于将所述半透半反元件的第一表面反射的所述第二成像光反射至所述第一曲面镜的第一表面。
结合第三方面，在第三方面的某些实现方式中，所述光学元件为反射镜或第二曲面镜。
结合第三方面，在第三方面的某些实现方式中，所述装置还包括：第一偏振转换器件。所述第一偏振转换器件位于所述防尘罩和所述半透半反元件之间的光路上，用于改变从所述防尘罩的第二表面透射的所述第一成像光的偏振方向，从所述半透半反元件的第一表面反射的所述第一成像光的偏振方向，还用于改变从所述第一曲面镜的第二表面透射的所述第二成像光的偏振方向，以及从所述半透半反元件的第一表面反射的所述第二成像光的偏振方向。
结合第三方面，在第三方面的某些实现方式中，所述第一偏振转换器件位于所述半透半反元件的第一表面上。
结合第三方面，在第三方面的某些实现方式中，所述第一偏振转换器件为1/4波片。
结合第三方面，在第三方面的某些实现方式中，从所述防尘罩出射所述第一成像光和所述第二成像光的偏振方向相同。
结合第三方面，在第三方面的某些实现方式中，所述第一像源出射的所述第一成像光为偏振光，所述第二像源出射的所述第二成像光为偏振光，所述偏振光包括P光和S光。
结合第三方面，在第三方面的某些实现方式中，所述第一像源出射的所述第一成像光和所述第二像源出射的所述第二成像光为P光。
第四方面，本申请实施例提供了一种交通工具。该交通工具包括如上述第一方面以及第一方面中任一种可能实现方式中的显示设备，或者包括如上述第二方面以及第二方面中任一种可能实现方式中的显示设备，或者包括如上述第三方面以及第三方面中任一种可能实现方式中的显示设备。
结合第四方面，在一个可能的方案中，显示装置安装在所述交通工具的仪表板台中。
结合第四方面，在一个可能的方案中，交通工具还包括风挡，显示装置发出的第一成像光和第二成像光入射至风挡，风挡将其反射至人眼。
结合第四方面，在一个可能的方案中，显示装置发出的第一成像光和第二成像光为S偏振光。
结合第四方面，在一个可能的方案中，该风挡上还设置有透P反S膜，可以将显示装置发出的S偏振光反射至人眼，过滤掉显示装置发出的杂散光(P光)，从而提升显示效果。
上述第三方面或第四方面带来的有益效果具体可以参考第一方面或第二方面中有益效果的描述，此处不再赘述。
附图说明
图1示出了本申请实施例提供的显示设备的一种应用场景的示意图。
图2示出了本申请实施例提供的一种显示设备200的结构示意图。
图3示出了本申请实施例提供的一种第一像源210或第二像源220的结构示意图。
图4示出了本申请实施例提供的一种显示设备400的结构示意图。
图5示出了本申请实施例提供的一种显示设备500的结构示意图。
图6示出了本申请实施例提供的一种显示设备600的结构示意图。
图7示出了本申请实施例提供的一种显示设备700的结构示意图。
图8示出了本申请实施例提供的一种显示设备800的结构示意图。
图9示出了本申请实施例提供的一种显示设备900的结构示意图。
图10示出了本申请实施例提供的一种显示设备1000的结构示意图。
图11示出了本申请实施例提供的一种显示设备1100的结构示意图。
图12示出了本申请实施例提供的一种显示设备1200的结构示意图。
图13示出了本申请实施例提供的一种显示设备1300的结构示意图。
图14示出了本申请实施例提供的一种显示设备1400的结构示意图。
图15示出了本申请实施例提供的一种显示设备1500的结构示意图。
图16示出了本申请实施例提供的一种HUD系统1600的结构示意图。
图17示出了本申请实施例提供的一种HUD系统1700的结构示意图。
图18示出了本申请实施例提供的一种HUD系统1800的结构示意图。
图19示出了本申请实施例提供的一种HUD系统1900的结构示意图。
图20示出了本申请实施例提供的一种HUD系统2000的结构示意图。
图21示出了本申请实施例提供的一种HUD系统2100的结构示意图。
图22示出了本申请实施例提供的一种HUD系统2200的结构示意图。
图23示出了本申请实施例提供的一种HUD系统2300的结构示意图。
图24示出了本申请实施例提供的一种HUD系统2400的结构示意图。
图25示出了本申请实施例提供的一种HUD系统2500的结构示意图。
图26示出了本申请实施例提供的一种HUD系统2600的结构示意图。
图27示出了本申请实施例提供的一种HUD系统2700的结构示意图。
图28示出了本申请实施例提供的一种HUD系统2800的结构示意图。
图29示出了本申请实施例提供的一种显示设备的电路示意图。
图30示出了本申请实施例提供的一种交通工具的功能框架示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
为了便于理解本申请实施例，作出以下说明。
第一、在下文示出的本申请实施例中的文字说明或者附图中的术语，“第一”、“第二”等以及各种数字编号仅为描述方便进行的区分，而不必用于描述特定的顺序或者先后次序，并不用来限制本申请实施例的范围。例如，区分不同的像源或者膜层等。
第二、下文示出的本申请实施例中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可以包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其他步骤或者单元。
第三、在本申请实施例中，“示例性的”或者“例如”等词用于表示例子、例证或说明， 被描述为“示例性的”或者“例如”的实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念，便于理解。
第四、在本申请实施例中，成像光均是指携带有图像(或图像信息)的光，用于生成图像。
第五、在本申请实施例中，曲面镜的面型不做限定，例如，可以是自由曲面镜等。
第六、在本申请实施例中，光学元件也可以称为光学器件或者光学元器件等。
图1是本申请实施例提供的HUD设备的一种应用场景的示意图。如图1所示，HUD设备设置在汽车上。HUD设备用于将车辆的状态信息、外界物体的指示信息和导航信息等通过车辆的挡风玻璃投射在驾驶员的视野范围内。状态信息包括但不限于行驶速度、行驶里程、燃油量、水温和车灯状态等信息。外界物体的指示信息包括但不限于安全车距、周围障碍物和倒车影像等。导航信息包括但不限于方向箭头、距离和行驶时间等。
其中，导航信息和外界物体的指示信息对应的虚像可以叠加在车辆外的真实环境上，使得驾驶员可获得增强现实的视觉效果，例如可用于增强现实(augmented reality，AR)导航、自适应巡航、车道偏离预警等。由于导航信息对应的虚像可以与实景结合，因此HUD设备通常与汽车的高级驾驶辅助系统(advanced driving assistant system，ADAS)系统配合。为了不干扰路况，仪表信息对应的虚像距离人眼通常为2米至3米左右。为了使导航信息对应的虚像与真实的路面能够更好的融合，导航信息对应的虚像距离人眼一般为7米至15米左右。其中，导航信息的虚像所在的位置称为远焦面，仪表信息的虚像所在的平面称为近焦面。
然而，为了实现双图像显示的AR-HUD，通常需要采用两个图像生成装置出射两路成像光，来分别实现两个不同距离的投影，整个系统的体积较大，具有占用较大车内空间的缺点，适用的车型有限。因此，本申请提供的显示装置，能够实现小尺寸的HUD系统，同时可以避让各种车型的结构干扰，能够满足绝大数车型HUD系统的小尺寸要求，以较小的成本实现较大的视场角(field of view，FOV)。
图2是本申请实施例提供的一种显示装置200的结构示意图。如图2所示，该显示装置200包括第一像源210，第二像源220、第一曲面镜230、半透半反元件240、防尘罩250。其中，第一像源210，位于第一曲面镜230的第一表面(如图中的表面1)的外侧。该第一像源210用于生成包含第一图像信息的第一成像光，并向第一曲面镜230的第一表面投射第一成像光。第二像源220，用于生成包含第二图像信息的第二成像光，并向半透半反元件240的第二表面(如图中的表面2)投射第二成像光。第一曲面镜230，用于从其第二表面(如图中的表面2)透射第一成像光至半透半反元件240的第一表面(如图中的表面1)，还用于在第一曲面镜230的第二表面反射来自半透半反元件240的第一成像光和第二成像光至防尘罩250。半透半反元件240，用于在其第一表面反射第一成像光至第一曲面镜230的第二表面，以及从半透半反元件240的第一表面透射第二成像光至第一曲面镜230的第二表面。防尘罩250，用于透射第一曲面镜230反射的第一成像光和第二成像光。
在本实施例中，在第一曲面镜230的第二表面和半透半反元件240的第一表面之间的光路上还设置有第一偏振转换器件2401。该第一偏振转换器件2401，用于改变从第一曲面镜230透射的第一成像光的偏振方向，以及从半透半反元件240的第一表面反射的第一成像光的偏振方向，还用于改变从半透半反元件240的第一表面透射的第二成像光的偏振方向。
示例性地，该半透半反元件240可以是镀有半透半反膜的平面镜，或者其他能够实现半透半反作用的光学元件，本申请并不做限定。
在一种可能的实现方式中，该第一偏振转换器件2401可以是四分之一波片(quarter-wave plate)，该1/4波片可以是具有一定厚度用单轴双折射晶体(例如，石英)或便于剥制的双轴晶体(例如云母)精细加工制备的。该1/4波片可以使用光学胶贴附在该半透半反元件240的第一表面上。
在一种可能的实现方式中，该第一偏振转换器件2401可以是镀在该半透半反元件240的第一表面上的薄膜1/4波片，可以是高分子有机薄膜1/4波片，例如涤纶薄膜，聚丙烯薄膜等，本申请不做限定。
在本实施例中，位于第二像源220和半透半反元件240的第二表面之间的光路上还设置有第二偏振转换器件2201，该第二偏振转换器件2201，用于改变从第二像源220出射的第二成像光的偏振方向。示例性地，该第二偏振转换器件2201可以是1/4波片或者薄膜1/4波片，本申请不做限定。当该第二偏振转换器件2201是1/4波片时，可通过光学胶贴附在第二像源220的出射表面上。当该第二偏振转换器件2201是薄膜1/4波片时，可以是镀在第二像源220的出射表面上的薄膜1/4波片。
在本实施例提供的显示装置200中，第一像源210和第二像源220投射的成像光可以P偏振光(简称为P光)或者S偏振光(简称为S光)。具体地，当第一像源210和第二像源220投射的成像光为P光时，该第一成像光透射第一偏振转换器件2401后转换为圆偏振光或椭圆偏振光。该圆偏振光或椭圆偏振光在半透半反元件240的第一表面上经过反射后，再次透射第一偏振转换器件2401，转换为S光，该S光再经过第一曲面镜的第二表面反射从防尘罩250出射。对于第二成像光来说，该第二成像光透过一次第二偏振转换器件2201后转换为圆偏振光或椭圆偏振光，再透射一次第一偏振转换器件2401后转换为S光，经第一曲面镜230的第二表面反射后从防尘罩250出射。当最终从防尘罩250出射的两束S光入射到人眼时，人眼可观看到第一图像和第二图像。
当该显示装置200应用于HUD系统中时，如图16所示，从防尘罩250出射两束S光将经过风挡玻璃1720反射最终入射人眼。具体地，从防尘罩250出射的第一成像光在人眼中生成第一虚像，从防尘罩250出射的第二成像光在人眼中生成第二虚像。由于该第一成像光的光程与第二成像光的光程不同，因此，在人眼中的第一虚像和第二虚像的成像焦平面不同。在图16中，该第一虚像为远焦虚像，该第二虚像为近焦虚像。在一种可实现的方式中，该风挡玻璃1720上还可以贴有透P反S膜，当两束S光均以布儒斯特角度入射时，可以提高第一成像光和第二成像光在风挡玻璃1720的反射率，从而提升第一成像光和第二成像光在人眼中的成像质量。
在本申请实施例中，该第一像源210或第二像源220中的一种可能的结构模块，可以如图3所示。在图3中，该第一像源210或第二像源220可包括光源310、调制单元320和投影器件330。其中，光源310用于提供承载图像数据的光束。调制单元320用于根据图像数据对光源发出的光束进行调制，使从调制单元320输出的光承载图像数据，即调制单元320输出的光为成像光(或称为图像光)。投影器件330用于将承载有图像数据的成像光投射。当第一像源210和第二像源220用于输出带有图像信息的偏振成像光时，该第一像源210和第二像源220中还可以包括偏振转换模块340，该偏振转换模块340用于改变成像光的偏振 态。
此外，在本申请实施例中，第一像源210或第二像源220可以为硅基液晶(Liquid Crystal On Silicon，LCOS)显示器、有机发光二极管(Organic Light-Emitting Diode，OLED)显示器、液晶显示器(Liquid Crystal Display，LCD)、数字光处理(Digital Light Procession，DLP)显示器或微机电系统(Micro-Electro-Mechanical Systems，MEMS)显示器等。
基于本申请提供的显示装置，将第一像源210的位置设置在第一曲面镜230的外侧，由于曲面镜230是有一定弧度的，本申请实施例能够合理利用显示装置中的空间，从而减小显示装置的体积。
图4示出了本申请提供了显示装置400的结构示意图。如图4所示，该显示装置400包括第一像源410，第二像源420、第一曲面镜430、半透半反元件440、防尘罩450。其中，所述第一像源410，位于第一曲面镜430的第一表面的外侧。第一像源410，第二像源420、第一曲面镜430、半透半反元件440、防尘罩450的具体作用可参考图2对应的实施例的说明，此处不再赘述。
此外，在本实施例中，第一偏振转换器件4401也可以参考图2中第一偏振转换器件2401的相关说明，此处不再赘述。
在本实施例中，位于第二像源220和半透半反元件240的第二表面之间的光路上的第二偏振转换器件4202可以是通过光学胶贴附在半透半反元件440的第二表面上的1/4波片，或者可以是镀在半透半反元件440的第二表面上的薄膜1/4波片，其用来改变第二成像光的偏振方向。
在本实施例提供的显示装置400中，第一像源410和第二像源420投射的成像光可以P光或者S光。具体地，可参考图2中的相关说明。以及，第一像源410或第二像源420的结构也可以参考图3中对第一像源210或第二像源220的说明。
基于本申请提供的显示装置，将第二偏振转换器件布置在半透半反元件440的第二表面上，可以避免对第二像源420的表面的镀膜或者贴膜，对第二像源420的要求较低。
图5是本申请实施例提供的一种显示装置500的结构示意图。如图5所示，该显示装置500包括第一像源510，第二像源520、第一曲面镜530、半透半反元件540、防尘罩550以及光学元件560。该图5所示的显示装置500是在图2所示的显示装置200加入了光学元件560，该光学元件560用于将第二像源出射的第二成像光反射至半透半反元件的第二表面。示例性地，该光学元件可以是反射镜、第二自由曲面镜或者其他具有反射作用的光学元件，本申请不做限定。
在本实施例中，第一偏振转换器件5401位于在第一曲面镜530的第二表面和半透半反元件540的第一表面之间的光路上。第一偏振转换器件5401用于改变从第一曲面镜230透射的第一成像光的偏振方向，以及从半透半反元件240的第一表面反射的第一成像光的偏振方向，还用于改变从半透半反元件240的第一表面透射的第二成像光的偏振方向。第二偏振转换器件5201位于第二像源520和光学元件560之间的光路上，该第二偏振转换器件5201用于改变从第二像源520出射的第二成像光的偏振方向。
其中，第一偏振转换器件5401和第二偏振转换器件5201可以是1/4波片或者薄膜1/4波片，本申请不做限定。
基于该光学元件560，可以将第二像源520与半透半反元件540之间的光路进行折叠， 可以进一步减小显示装置的体积。
该显示装置500中的各个部分或元件的作用可对应于图2中相应部分或元件的说明，此处不再赘述。
图6是本申请实施例提供的一种显示装置600的结构示意图。如图6所示，该显示装置600包括第一像源610，第二像源620、第一曲面镜630、半透半反元件640、防尘罩650以及光学元件660。该图6所示的显示装置600是在图4所示的显示装置400的基础上加入了光学元件660，该光学元件660用于将第二像源620出射的第二成像光反射至半透半反元件640的第二表面，以及用于透射从半透半反元件640的第二表面透射的第一成像光。
在一种可实现的方式中，该光学元件660由第三偏振转换器件6601和透射平板6602构成。具体地，第三偏振转换器件6601用于透射从半透半反元件640的第二表面透射的第一成像光，并将第二像源出射的第二成像光反射至半透半反元件的第二表面，透射平板6602用于透射从第三偏振转换器件6601透射的第一成像光。
其中，第一像源610出射的第一成像光在半透半反元件640的第一表面反射时，会存在一部分的第一成像光透射该半透半反元件640以及第二偏转器件6402后入射到光学元件660的表面，被光学元件660反射后，进入第二成像光的光路中，形成杂散光。因此，本申请实施例可以根据该第一成像光和第二成像光的偏振特性，在光学元件6602的表面贴上或镀上双增亮膜(dual brightness enhancement film，DBEF)。例如，当第一成像光和第二成像光都为P光时，该第三偏振转换器件6601可以是反P透S型的DBEF。
基于该光学元件660，不仅可以将第二像源620与半透半反元件640之间的光路进行折叠，进一步减小显示装置的体积，同时还可以消除显示装置600中的杂散光，从而提高成像质量。
该显示装置600中的各个部分或元件的作用可对应于图4中相应部分或元件的说明，此处不再赘述。
图7是本申请实施例提供的一种显示装置700的结构示意图。如图7所示，该显示装置700包括第一像源710，第二像源720、第一曲面镜730、半透半反元件740、防尘罩750。其中，第一像源710位于防尘罩750的第二表面(如图中的表面2)的外侧。该第一像源710用于生成包含第一图像信息的第一成像光，并向防尘罩750的第二表面投射第一成像光。第二像源720，用于生成包含第二图像信息的第二成像光，并向半透半反元件740的第二表面(如图中的表面2)投射第二成像光。半透半反元件740，用于在半透半反元件740的第一表面(如图中的表面1)反射第一成像光至第一曲面镜730的第一表面(如图中的表面1)，以及从半透半反元件740的第二表面透射第二成像光至第一曲面镜730的第一表面。第一曲面镜730，用于反射第一成像光和第二成像光至防尘罩750的第一表面(如图中的表面1)。防尘罩750，用于透射第一像源710出射的第一成像光至半透半反元件740的第一表面，以及用于透射第一曲面镜730反射的第一成像光和第二成像光。
在本实施例中，在防尘罩750和半透半反元件740的第一表面之间的光路上，设置有第一偏振转换器件7401。该第一偏振转换器件7401，用于改变从防尘罩750的第一表面透射的第一成像光的偏振方向，以及从半透半反元件740的第一表面反射的第一成像光的偏振方向，还用于改变从半透半反元件740的第一表面透射的第二成像光的偏振方向。
在一种可能的实现方式中，该第一偏振转换器件7401可以是1/4波片。该1/4波片可以 使用光学胶贴附在该半透半反元件740的第一表面上。
在另一种可能的实现方式中，该第一偏振转换器件7401可以是镀在该半透半反元件740的第一表面上的薄膜1/4波片。
在本实施例中，位于第二像源720和半透半反元件740的第二表面之间的光路上还设置有第二偏振转换器件7201，该第二偏振转换器件7201，用于改变从第二像源720出射的第二成像光的偏振方向。示例性地，该第二偏振转换器件7201可以是1/4波片或者薄膜1/4波片，本申请不做限定。当该第二偏振转换器件7201是1/4波片时，可通过光学胶贴附在第二像源720的出射表面上。当该第二偏振转换器件7201是薄膜1/4波片时，可以是镀在第二像源720的出射表面上的薄膜1/4波片。
在本实施例提供的显示装置700中，第一像源710和第二像源720投射的成像光可以P光或者S光，本申请并不限定。具体地，当第一像源710和第二像源720投射的成像光为P光时，该第一成像光透射第一偏振转换器件7401后转换为圆偏振光或椭圆偏振光。该圆偏振光或椭圆偏振光在半透半反元件740的第一表面上经过反射后，再次透射第一偏振转换器件7401，转换为S光，该S光再经过第一曲面镜的第二表面反射从防尘罩750出射。对于第二成像光来说，该第二成像光透过一次第二偏振转换器件7201后转换为圆偏振光或椭圆偏振光，再透射一次第一偏振转换器件7401后转换为S光，经第一曲面镜的第二表面反射后从防尘罩750出射。当最终从防尘罩750出射的两束S光入射到人眼时，人眼可观看到第一图像和第二图像。
此外，该第一曲面镜730的第二表面上还可以镀有透P反S膜或贴有透P反S膜，当第一像源710和第二像源720投射的成像光为P光时，第一成像光经过两次第一偏振转换器件7401的透射后，转换为S光入射到第一曲面镜730的第二表面上。第二成像光经过一次第二偏振转换器件7201的透射后，转换为圆偏振光或者椭圆偏振光，再经过一次第一偏转转换器件7401后成为S光入射到第一曲面镜730的第二表面上。因此，该第一曲面镜730的第二表面上的透P反S膜能够提高第一成像光和第二成像光的反射率，并消除光路中的杂散光，从而提高成像的品质。
当本申请提供的显示装置700应用于HUD系统中时，如图20所示，从防尘罩750出射两束S光将经过风挡玻璃2120反射最终入射人眼。具体地，从防尘罩750出射的第一成像光在人眼中生成第一虚像，从防尘罩250出射的第二成像光在人眼中生成第二虚像。由于该第一成像光的光程与第二成像光的光程不同，因此，在人眼中的第一虚像和第二虚像的成像焦平面不同。在图20中，该第一虚像为远焦虚像，该第二虚像为近焦虚像。在一种可实现的方式中，该风挡玻璃2120上还可以贴有透P反S膜，当两束S光均以布儒斯特角度入射时，可以提高第一成像光和第二成像光在风挡玻璃2120的反射率，从而提升第一成像光和第二成像光在人眼中的成像质量。
在本申请实施例中，该第一像源710或第二像源720中的一种可能的结构模块，可以参考图3所示中对第一像源210或第二像源220的说明，此处不再赘述。
基于本申请提供的显示装置，将第一像源的位置设置在防尘罩的外侧，因而不需要占用防尘罩内部的空间。在将显示装置安装到交通工具的仪表盘(Instrument Panel，IP)台时，第一像源710的位置可以根据需要灵活调整，可以充分利用IP台上的空间，整体上减小了显示装置在交通工具上占用的空间，便于显示装置安装在空间较小的交通工具上，适应性更好。 另外，当出射防尘罩的偏振光的偏振方向为S光时，由于S光的反射率随入射角的增大而增大，此时，本申请实施例提供的显示装置还能够扩大显示的视场角。
图8示出了本申请提供了显示装置800的结构示意图。如图8所示，该显示装置800包括第一像源810，第二像源820、第一曲面镜830、半透半反元件840、防尘罩850。其中，所述第一像源810，位于防尘罩850的第二表面(如图中的表面2)的外侧。第一像源810，第二像源820、第一曲面镜830、半透半反元件840、防尘罩850的具体作用可参考图7中对应的部分的说明，此处不再赘述。
此外，在本实施例中，第一偏振转换器件8401也可以参考图7中第一偏振转换器件8401的相关说明，此处不再赘述。
在本实施例中，位于第二像源820和半透半反元件840的第二表面之间的光路上的第二偏振转换器件8402可以是通过光学胶贴附在半透半反元件840的第二表面上的1/4波片，或者可以是镀在半透半反元件840的第二表面上的薄膜1/4波片，来改变第二成像光的偏振方向。
在本实施例提供的显示装置800中，第一像源810和第二像源820投射的成像光可以P偏振光(简称为P光)或者S偏振光(简称为S光)，具体地，可参考图7中的相关说明。第二像源820投射的第二成像光为P光时，该第二成像光透射第二偏振转换器件8402后转换为圆偏振光或椭圆偏振光。该圆偏振光或椭圆偏振光透射半透半反元件840，再次透射第一偏振转换器件8401，转换为S光，该S光再经过第一曲面镜830的第二表面反射从防尘罩850出射。
图9是本申请实施例提供的一种显示装置900的结构示意图。如图9所示，该显示装置900包括第一像源910，第二像源920、第一曲面镜930、半透半反元件940、防尘罩950。其中，第一像源910位于防尘罩950的第二表面(如图中的表面2)的外侧。该第一像源910用于生成包含第一图像信息的第一成像光，并向防尘罩950的第二表面投射第一成像光。第二像源920，用于生成包含第二图像信息的第二成像光，并向半透半反元件940的第二表面(如图中的表面2)投射第二成像光。半透半反元件940，用于在半透半反元件940的第一表面(如图中的表面1)反射第一成像光至第一曲面镜930的第一表面(如图中的表面1)，以及从半透半反元件940的第二表面透射第二成像光至第一曲面镜930的第一表面。第一曲面镜930，用于反射第一成像光和第二成像光至防尘罩950的第一表面(如图中的表面1)。防尘罩950，用于透射第一像源910出射的第一成像光至半透半反元件940的第一表面，以及用于透射第一曲面镜930反射的第一成像光和第二成像光。
在本实施例中，在防尘罩950上设置有第一偏振转换器件9501。该第一偏振转换器件9501用于改变从防尘罩950的第一表面透射的第一成像光的偏振方向，以及从第一曲面镜930的第一表面反射的第一成像光和第二成像光的偏振方向。该第一偏振转换器件9501位于防尘罩950的第一表面上。
其中，该第一偏振转换器件9501以及第二偏振器件9201可以是1/4波片或薄膜1/4波片，具体地，可以参考上述图7中的相关说明，在此不再赘述。
在另一种可实现的方式中，第一偏振转换器件9501还可位于防尘罩950的第二表面上。
在本实施例提供的显示装置900中，第一像源910和第二像源920投射的成像光可以P光或者S光，本申请并不限定。示例性地，第一像源910投射的第一成像光和第二像源920 投射的第二成像光均为P光时，该第一成像光透射第一偏振转换器件9501后，转换为圆偏振光或椭圆偏振光，经过半透半反元件940的第一表面和第一曲面镜930的第一表面反射后，再一次透射第一偏振转换器件9501转换为S光，从防尘罩950出射。该第二成像光透射第二偏振转换器件9201后，转换为圆偏振光或椭圆偏振光，透射半透半反元件940后在第一曲面镜930的第一表面反射，再透射一次第一偏振转换器件9501后转换为S光，从防尘罩950出射。此外，该第一像源910或第二像源920中的一种可能的结构模块，可以参考图3所示中对第一像源210或第二像源220的说明，此处不再赘述。
图10是本申请实施例提供的一种显示装置1000的结构示意图。如图10所示，该显示装置1000包括第一像源1010，第二像源1020、第一曲面镜1030、半透半反元件1040、防尘罩1050。其中，第一像源1010，第二像源1020、第一曲面镜1030、半透半反元件1040、防尘罩1050的结构分别和上述图9中的实施例的第一像源910，第二像源920、第一曲面镜930、半透半反元件940、防尘罩950的结构类似，具体可以参考上述实施例。
在本实施例中，在第一曲面镜1030的第一表面上设置有第一偏振转换器件1031。该第一偏振转换器件1031用于改变从半透半反元件1040的第一表面反射的第一成像光的偏振方向，以及从半透半反元件1040的第一表面透射的第二成像光的偏振方向，还用于改变从第一曲面镜1030的第一表面反射的第一成像光和第二成像光的偏振方向。
该第一偏振转换器件1031可以是1/4波片或者薄膜1/4波片，当该第一偏振转换器件1031为1/4波片时，可以使用光学胶贴附在第一曲面镜1030的第一表面上。当第一偏振转换器件7401为薄膜1/4波片时，可以是镀在第一曲面镜1030的第一表面上。
在图10所示的装置1000中，第一像源1010和第二像源1020投射的成像光可以P光或者S光，本申请并不限定。示例性地，第一像源1010投射的第一成像光和第二像源1020投射的第二成像光均为P光时，该第一成像光首先透射防尘罩1050后传输至半透半反元件1040，在半透半反元件1040的第一表面反射后，透射一次第一偏振转换器件1031，转换为圆偏振光或椭圆偏振光，经第一曲面镜930的第一表面反射后再次透射第一偏振转换器件9501，转换为S光，从防尘罩950出射。该第二成像光首先透射半透半反元件1040，然后透射一次第一偏振转换器件1031，转换为圆偏振光或椭圆偏振光，经第一曲面镜930的第一表面反射后再次透射第一偏振转换器件9501，转换为S光，从防尘罩950出射。
基于上述方案，本申请实施例提供的显示装置1000中仅包含一个偏振转换器件，能够节约成本。
图11是本申请实施例提供的一种显示装置1100的结构示意图。如图11所示，该显示装置1100包括第一像源1110，第二像源1120、第一曲面镜1130、半透半反元件1140、防尘罩1150以及光学元件1160。该图11所示的显示装置1100是在图7所示的显示装置700的基础上加入了光学元件1160，该光学元件1160用于将第二像源出射的第二成像光反射至半透半反元件的第二表面。示例性地，该光学元件可以是反射镜、第二自由曲面镜或者其他具有反射作用的光学元件，本申请不做限定。
基于该光学元件1160，可以将第二像源1120与半透半反元件1140之间的光路进行折叠，可以进一步减小显示装置的体积。
该显示装置1100中的各个部分或元件的作用可对应于图7中相应部分或元件的说明，此处不再赘述。
图12是本申请实施例提供的一种显示装置1200的结构示意图。如图12所示，该显示装置1200包括第一像源1210，第二像源1220、第一曲面镜1230、半透半反元件1240、防尘罩1250以及光学元件1260。该图12所示的显示装置1200是在图8所示的显示装置800的基础上加入了光学元件1260，该光学元件1260用于将第二像源出射的第二成像光反射至半透半反元件的第二表面，以及用于透射从半透半反元件1240的第二表面透射的第一成像光。
该光学元件1260的结构、作用以及可参考图6中的光学元件660，此处不再赘述。该显示装置1200中的各个部分或元件的作用可对应于图8中相应部分或元件的说明，此处不再赘述。
图13是本申请实施例提供的一种显示装置1300的结构示意图。如图13所示，该显示装置1300包括第一像源1310，第二像源1320、第一曲面镜1330、半透半反元件1340、防尘罩1350以及光学元件1360。该图13所示的显示装置1300是在图9所示的显示装置900的基础上加入了光学元件1360，该光学元件1360用于将第二像源出射的第二成像光反射至半透半反元件的第二表面。示例性地，该光学元件可以是反射镜、第二自由曲面镜或者其他具有反射作用的光学元件，本申请不做限定。
基于该光学元件1360，可以将第二像源1320与半透半反元件1340之间的光路进行折叠，可以进一步减小显示装置的体积。
该显示装置1300中的各个部分或元件的作用可对应于图9中相应部分或元件的说明，此处不再赘述。
图14是本申请实施例提供的一种显示装置1400的结构示意图。如图14所示，该显示装置1400包括第一像源1410，第二像源1420、第一曲面镜1430、半透半反元件1440、防尘罩1450以及光学元件1460。该图14所示的显示装置1400是在图10所示的显示装置1000的基础上加入了光学元件1460，该光学元件1460用于将第二像源出射的第二成像光反射至半透半反元件的第二表面。示例性地，该光学元件可以是反射镜、第二自由曲面镜或者其他具有反射作用的光学元件，本申请不做限定。
该光学元件1460，可以将第二像源1420与半透半反元件1440之间的光路进行折叠，可以进一步减小显示装置的体积。
该显示装置1400中的各个部分或元件的作用可对应于图10中相应部分或元件的说明，此处不再赘述。
图15是本申请实施例提供的一种显示装置1500的结构示意图。如图15所示，该显示装置1500包括第一像源1510，第二像源1520、第一曲面镜1530、半透半反元件1540、防尘罩1550。其中，第一像源1510，第二像源1520、第一曲面镜1530、半透半反元件1540、防尘罩1550的结构分别和上述图14的实施例中的第一像源1410，第二像源1420、第一曲面镜1430、半透半反元件1440、防尘罩1450的结构类似，具体可以参考上述实施例。
在本实施例中，在防尘罩1550和半透半反元件1540的第一表面之间的光路上，设置有第一偏振转换器件1541。该第一偏振转换器件1541，用于改变从防尘罩1550的第一表面透射的第一成像光的偏振方向，从半透半反元件1540的第一表面反射的第一成像光的偏振方向，还用于改变从第一曲面镜1530的第二表面透射的第二成像光的偏振方向，以及半从半透半反元件1540的第一表面反射的第二成像光的偏振方向。
该第一偏振转换器件1541可以是使用光学胶贴附在该半透半反元件1540的第一表面上 的1/4波片，也可以是镀在该半透半反元件1540的第一表面上的薄膜1/4波片。
在本实施例提供的显示装置1500中，第一像源1510和第二像源1520投射的成像光可以P光或者S光，本申请并不限定。具体地，当第一像源1510和第二像源1520投射的成像光为P光时，该第一成像光和第二成像光透射第一偏振转换器件1541后转换为圆偏振光或椭圆偏振光。该两束圆偏振光或椭圆偏振光在半透半反元件1540的第一表面上经过反射后，再次透射第一偏振转换器件1541，转换为S光，再经过第一曲面镜1530的第二表面反射从防尘罩1550出射。当最终从防尘罩1550出射的两束S光入射到人眼时，人眼可观看到第一图像和第二图像。
此外，该第一曲面镜1530的第二表面上还可以镀有透P反S膜或贴有透P反S膜，用来消除光路中的杂散光，从而提高成像的品质。
在一种可实现的方式中，基于上述显示装置1500，可以在上述第一曲面镜1530与半透半反元件1540之间的光路上放置光学元件，该光学元件可以是反射镜或者具有反射功能的光学元件，用于对第一曲面镜1530与半透半反元件1540之间的光路进行折叠，可以进一步减小显示装置的体积。
应理解，上述本申请实施例提供的装置可以单独使用，也可以结合使用，本申请对此不做限制。
以上，结合图2、图4至图15分别说明了本申请实施例提供的显示装置的可能情况，下面结合图16至图28示出了本申请实施例提供的显示装置应用于HUD中的整体系统的实施例。其中，图16为上述图2的显示装置应用于HUD中的整体系统的示意图。图17为上述图4的显示装置应用于HUD中的整体系统的示意图。图18至图28分别对应图5至图15的显示装置应用于HUD中的整体系统的示意图。基于图16至图28所示的HUD系统可以看出，本申请提供的小体积显示装置能够实现双焦面的图像。其中，系统实施例的描述与装置实施例的描述可以相互对应，因此，未描述的部分可以参见前面装置实施例。
图29是本申请实施例提供的显示装置的电路示意图。如图29所示，显示装置中的电路主要包括包含主处理器(host CPU)3101，外部存储器接口3102，内部存储器3103，音频模块3104，视频模块3105，电源模块3106，无线通信模块3107，I/O接口3108、视频接口3109、显示电路3110和调制器3131等。其中，主处理器3101与其周边的元件，例如外部存储器接口3102，内部存储器3103，音频模块3104，视频模块3105，电源模块3106，无线通信模块3107，I/O接口3108、视频接口3109、显示电路3110可以通过总线连接。主处理器3101可以称为前端处理器。
另外，本申请实施例示意的电路图并不构成对显示装置的具体限定。在本申请另一些实施例中，显示装置可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。图示的部件可以以硬件，软件或软件和硬件的组合实现。
其中，主处理器3101包括一个或多个处理单元，例如：主处理器3101可以包括应用处理器(Application Processor，AP)，调制解调处理器，图形处理器(Graphics Processing Unit，GPU)，图像信号处理器(Image Signal Processor，ISP)，控制器，视频编解码器，数字信号处理器(Digital Signal Processor，DSP)，基带处理器，和/或神经网络处理器(Neural-Network Processing Unit，NPU)等。其中，不同的处理单元可以是独立的器件，也可以集成在一个或多个处理器中。
主处理器3101中还可以设置存储器，用于存储指令和数据。在一些实施例中，主处理器 3101中的存储器为高速缓冲存储器。该存储器可以保存主处理器3101刚用过或循环使用的指令或数据。如果主处理器3101需要再次使用该指令或数据，可从所述存储器中直接调用。避免了重复存取，减少了主处理器3101的等待时间，因而提高了系统的效率。
在一些实施例中，显示装置还可以包括多个连接到主处理器3101的输入输出(Input/Output，I/O)接口3108。接口3108可以包括集成电路(Inter-Integrated Circuit，I2C)接口，集成电路内置音频(Inter-Integrated Circuit Sound，I2S)接口，脉冲编码调制(Pulse Code Modulation，PCM)接口，通用异步收发传输器(Universal Asynchronous Receiver/Transmitter，UART)接口，移动产业处理器接口(Mobile Industry Processor Interface，MIPI)，通用输入输出(General-Purpose Input/Output，GPIO)接口，用户标识模块(Subscriber Identity Module，SIM)接口，和/或通用串行总线(Universal Serial Bus，USB)接口，控制器局域网(Controller Area Network，CAN)接口等。上述I/O接口3108可以连接鼠标、触摸板、键盘、摄像头、扬声器/喇叭、麦克风等设备，也可以连接显示装置上的物理按键(例如音量键、亮度调节键、开关机键等)。
外部存储器接口3102可以用于连接外部存储卡，例如Micro SD卡，实现扩展显示装置的存储能力。外部存储卡通过外部存储器接口3102与主处理器3101通信，实现数据存储功能。
内部存储器3103可以用于存储计算机可执行程序代码，所述可执行程序代码包括指令。内部存储器3103可以包括存储程序区和存储数据区。其中，存储程序区可存储操作系统，至少一个功能所需的应用程序(比如通话功能，时间设置功能等)等。存储数据区可存储显示装置使用过程中所创建的数据(比如电话簿，世界时间等)等。此外，内部存储器3103可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件，闪存器件，通用闪存存储器(Universal Flash Storage，UFS)等。主处理器3101通过运行存储在内部存储器3103的指令，和/或存储在设置于主处理器3101中的存储器的指令，执行显示装置的各种功能应用以及数据处理。
显示装置可以通过音频模块3104以及应用处理器等实现音频功能。例如音乐播放，通话等。
音频模块3104用于将数字音频信息转换成模拟音频信号输出，也用于将模拟音频输入转换为数字音频信号。音频模块3104还可以用于对音频信号编码和解码，例如进行放音或录音。在一些实施例中，音频模块3104可以设置于主处理器3101中，或将音频模块3104的部分功能模块设置于主处理器3101中。
视频接口3109可以接收外部输入的音视频信号，其具体可以为高清晰多媒体接口(High Definition Multimedia Interface，HDMI)，数字视频接口(Digital Visual Interface，DVI)，视频图形阵列(Video Graphics Array，VGA)，显示端口(Display port，DP)等，视频接口3109还可以向外输出视频。当显示装置作为抬头显示使用时，视频接口3109可以接收周边设备输入的速度信号、电量信号，还可以接收外部输入的AR视频信号。当显示装置作为投影仪使用时，视频接口3109可以接收外部电脑或终端设备输入的视频信号。
视频模块3105可以对视频接口3109输入的视频进行解码，例如进行H.264解码。视频模块还可以对显示装置采集到的视频进行编码，例如对外接的摄像头采集到的视频进行H.264编码。此外，主处理器3101也可以对视频接口3109输入的视频进行解码，然后将解码后的 图像信号输出到显示电路3110。
显示电路3110和调制器3111用于显示对应的图像。在本实施例中，视频接口3109接收外部输入的视频源信号，视频模块3105进行解码和/或数字化处理后输出一路或多路图像信号至显示电路3110，显示电路3110根据输入的图像信号驱动调制器3111将入射的偏振光进行成像，进而输出至少两路成像光。此外，主处理器3101也可以向显示电路3110输出一路或多路图像信号。
在本实施例中，显示电路3110以及调制器3131属于图3所示的调制单元320中的电子元件，显示电路3110可以称为驱动电路。
电源模块3106用于根据输入的电力(例如直流电)为主处理器3101和光源3100提供电源，电源模块3106中可以包括可充电电池，可充电电池可以为主处理器3101和光源3100提供电源。光源3100发出的光可以传输到调制器3111进行成像，从而形成图像光信号。
无线通信模块3107可以使得显示装置与外界进行无线通信，其可以提供无线局域网(Wireless Local Area Networks，WLAN)(如无线保真(Wireless Fidelity，Wi-Fi)网络)，蓝牙(Bluetooth，BT)，全球导航卫星系统(Global Navigation Satellite System，GNSS)，调频(Frequency Modulation，FM)，近距离无线通信技术(Near Field Communication，NFC)，红外技术(Infrared，IR)等无线通信的解决方案。无线通信模块3107可以是集成至少一个通信处理模块的一个或多个器件。无线通信模块3107经由天线接收电磁波，将电磁波信号调频以及滤波处理，将处理后的信号发送到主处理器3101。无线通信模块3107还可以从主处理器3101接收待发送的信号，对其进行调频，放大，经天线转为电磁波辐射出去。
另外，视频模块3105进行解码的视频数据除了通过视频接口3109输入之外，还可以通过无线通信模块3107以无线的方式接收或从外部存储器中读取，例如显示装置可以通过车内的无线局域网从终端设备或车载娱乐系统接收视频数据，显示装置还可以读取外部存储器中存储的音视频数据。
上述显示装置可以安装在交通工具上，请参见图30，图30是本申请实施例提供的一种交通工具的一种可能的功能框架示意图。
如图30所示，交通工具的功能框架中可包括各种子系统，例如图示中的传感器系统12、控制系统14、一个或多个外围设备16(图示以一个为例示出)、电源18、计算机系统20和显示系统22。可选地，交通工具还可包括其他功能系统，例如为交通工具提供动力的引擎系统等等，本申请这里不做限定。
其中，传感器系统12可包括若干检测装置，这些检测装置能感受到被测量的信息，并将感受到的信息按照一定规律将其转换为电信号或者其他所需形式的信息输出。如图示出，这些检测装置可包括全球定位系统(global positioning system，GPS)、车速传感器、惯性测量单元(inertial measurement unit，IMU)、雷达单元、激光测距仪、摄像装置、轮速传感器、转向传感器、档位传感器、或者其他用于自动检测的元件等等，本申请并不做限定。
控制系统14可包括若干元件，例如图示出的转向单元、制动单元、照明系统、自动驾驶系统、地图导航系统、网络对时系统和障碍规避系统。可选地，控制系统14还可包括诸如用于控制车辆行驶速度的油门控制器及发动机控制器等元件，本申请不做限定。
外围设备16可包括若干元件，例如图示中的通信系统、触摸屏、用户接口、麦克风以及扬声器等等。其中，通信系统用于实现交通工具和除交通工具之外的其他设备之间的网络通 信。在实际应用中，通信系统可采用无线通信技术或有线通信技术实现交通工具和其他设备之间的网络通信。该有线通信技术可以是指车辆和其他设备之间通过网线或光纤等方式通信。
电源18代表为车辆提供电力或能源的系统，其可包括但不限于再充电的锂电池或铅酸电池等。在实际应用中，电源中的一个或多个电池组件用于提供车辆启动的电能或能量，电源的种类和材料本申请并不限定。
交通工具的若干功能均由计算机系统20控制实现。计算机系统20可包括一个或多个处理器2001(图示以一个处理器为例示出)和存储器2002(也可称为存储装置)。在实际应用中，该存储器2002也在计算机系统20内部，也可在计算机系统20外部，例如作为交通工具中的缓存等，本申请不做限定。其中，
处理器2001可包括一个或多个通用处理器，例如图形处理器(graphic processing unit，GPU)。处理器2001可用于运行存储器2002中存储的相关程序或程序对应的指令，以实现车辆的相应功能。
存储器2002可以包括易失性存储器(volatile memory)，例如RAM；存储器也可以包括非易失性存储器(non-volatile memory)，例如ROM、快闪存储器(flash memory)、HDD或固态硬盘SSD；存储器2002还可以包括上述种类的存储器的组合。存储器2002可用于存储一组程序代码或程序代码对应的指令，以便于处理器2001调用存储器2002中存储的程序代码或指令以实现车辆的相应功能。本申请中，存储器2002中可存储一组用于车辆控制的程序代码，处理器2001调用该程序代码可控制车辆安全行驶，关于如何实现车辆安全行驶具体在本申请下文详述。
可选地，存储器2002除了存储程序代码或指令之外，还可存储诸如道路地图、驾驶线路、传感器数据等信息。计算机系统20可以结合车辆功能框架示意图中的其他元件，例如传感器系统中的传感器、GPS等，实现车辆的相关功能。例如，计算机系统20可基于传感器系统12的数据输入控制交通工具的行驶方向或行驶速度等，本申请不做限定。
显示系统22可以显示图像信息，例如显示导航信息、播放视频等。显示系统22的具体结构参考上述显示装置的实施例，在此不再赘述。
其中，本申请图30示出包括四个子系统，传感器系统12、控制系统14、计算机系统20和显示系统22仅为示例，并不构成限定。在实际应用中，交通工具可根据不同功能对车辆中的若干元件进行组合，从而得到相应不同功能的子系统。在实际应用中，交通工具可包括更多或更少的系统或元件，本申请不做限定。
上述交通工具可以为轿车、卡车、摩托车、公共汽车、船、飞机、直升飞机、割草机、娱乐车、游乐场车辆、施工设备、电车、高尔夫球车、火车、和手推车等，本申请实施例不做特别的限定。
除非另作定义，此处使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。
以上所述仅为本申请一个实施例，并不用以限制本申请，凡在本申请的基础上所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (26)

  1. 一种显示装置，其特征在于，包括：第一像源、第二像源、第一曲面镜、半透半反元件、防尘罩，所述第一像源位于所述第一曲面镜的第一表面的外侧，
    所述第一像源，用于生成包含第一图像信息的第一成像光，并向所述第一曲面镜的第一表面投射所述第一成像光；
    所述第一曲面镜，用于从所述第一曲面镜的第二表面透射所述第一成像光至所述半透半反元件的第一表面，还用于在所述第一曲面镜的第二表面反射来自所述半透半反元件的所述第一成像光和第二成像光至所述防尘罩；
    所述第二像源，用于生成包含第二图像信息的第二成像光，并向所述半透半反元件的第二表面投射所述第二成像光；
    所述半透半反元件，用于在所述半透半反元件的第一表面反射所述第一成像光至所述第一曲面镜的第二表面，以及从所述半透半反元件的第一表面透射所述第二成像光至所述第一曲面镜的第二表面；
    所述防尘罩，用于透射所述第一曲面镜反射的所述第一成像光和所述第二成像光。
  2. 根据权利要求1所述的装置，其特征在于，所述装置还包括：光学元件，
    所述光学元件，用于将所述第二像源出射的所述第二成像光反射至所述半透半反元件的第二表面。
  3. 根据权利要求1或2所述的装置，其特征在于，所述装置还包括：
    第一偏振转换器件，所述第一偏振转换器件位于所述第一曲面镜和所述半透半反元件之间的光路上，用于改变从所述第一曲面镜透射的所述第一成像光的偏振方向，以及从所述半透半反元件的第一表面反射的所述第一成像光的偏振方向，还用于改变从所述半透半反元件的第一表面透射的所述第二成像光的偏振方向。
  4. 根据权利要求3所述的装置，其特征在于，
    所述第一偏振转换器件位于所述半透半反元件的第一表面上。
  5. 根据权利要求3或4所述的装置，其特征在于，所述装置还包括：
    第二偏振转换器件，所述第二偏振转换器件位于所述第二像源和所述半透半反元件之间的光路上，用于改变从所述第二像源出射的所述第二成像光的偏振方向。
  6. 根据权利要求5所述的装置，其特征在于，
    所述第二偏振转换器件位于所述第二像源的出射表面上或者所述半透半反元件的第二表面上。
  7. 根据权利要求6所述的装置，其特征在于，
    所述光学元件还用于透射从所述半透半反元件的第二表面透射的所述第一成像光，其中，所述第二偏振转换器件位于所述半透半反元件的第二表面上。
  8. 根据权利要求7所述的装置，其特征在于，所述光学元件包括第三偏振转换器件和透射平板；
    所述第三偏振转换器件用于透射从所述半透半反元件的第二表面透射的所述第一成像光，并反射从所述第二像源出射的所述第二成像光，所述透射平板用于透射所述第三偏振转换器件透射的所述第一成像光。
  9. 根据权利要求5所述的装置，其特征在于，
    所述第一偏振转换器件和所述第二偏振转换器件为1/4波片。
  10. 根据权利要求1至9中任一项所述的装置，其特征在于，
    从所述防尘罩透射的所述第一成像光和所述第二成像光的偏振方向相同。
  11. 根据权利要求1所述的装置，其特征在于，
    所述第一像源出射的所述第一成像光为偏振光，所述第二像源出射的所述第二成像光为偏振光，所述偏振光为P光或S光。
  12. 根据权利要求1所述的装置，其特征在于，
    所述第一曲面镜的第一表面镀有透P反S膜或贴有透P反S膜。
  13. 一种显示装置，其特征在于，包括：第一像源、第二像源、第一曲面镜、半透半反元件、防尘罩，所述第一像源位于所述防尘罩的外侧，
    所述第一像源，用于生成包含第一图像信息的第一成像光，并向所述防尘罩投射所述第一成像光；
    所述第二像源，用于生成包含第二图像信息的第二成像光，并向所述半透半反元件的第二表面投射所述第二成像光；
    所述防尘罩，用于透射所述第一成像光至所述半透半反元件的第一表面；
    所述半透半反元件，用于在所述半透半反元件的第一表面反射所述第一成像光至所述第一曲面镜的第一表面，以及从所述半透半反元件的第二表面透射所述第二成像光至所述第一曲面镜的第一表面；
    所述第一曲面镜，用于反射所述第一成像光和第二成像光至所述防尘罩；
    所述防尘罩还用于透射所述第一曲面镜反射的所述第一成像光和所述第二成像光到所述防尘罩外面。
  14. 根据权利要求13所述的装置，其特征在于，所述装置还包括：光学元件，
    所述光学元件，用于将所述第二像源出射的所述第二成像光反射至所述半透半反元件的第二表面。
  15. 根据权利要求13或14所述的装置，其特征在于，所述装置还包括：
    第一偏振转换器件，所述第一偏振转换器件位于所述防尘罩和所述半透半反元件之间的光路上，用于改变从所述防尘罩透射的所述第一成像光的偏振方向，以及从所述半透半反元件的第一表面反射的所述第一成像光的偏振方向，还用于改变从所述半透半反元件的第一表面透射的所述第二成像光的偏振方向。
  16. 根据权利要求15所述的装置，其特征在于，
    所述第一偏振转换器件位于所述半透半反元件的第一表面上。
  17. 根据权利要求13或14所述的装置，其特征在于，所述装置还包括：
    第一偏振转换器件，所述第一偏振转换器件位于所述第一曲面镜与所述防尘罩之间的光路上，用于改变从所述防尘罩透射的所述第一成像光的偏振方向，以及从所述第一曲面镜的第一表面反射的所述第一成像光和所述第二成像光的偏振方向。
  18. 根据权利要求17所述的装置，其特征在于，
    所述第一偏振转换器件位于所述防尘罩内侧表面上。
  19. 根据权利要求15至18中任一项所述的装置，其特征在于，所述装置还包括：
    第二偏振转换器件，所述第一偏振转换器件位于所述第二像源和所述半透半反元件之间的光路上，用于改变从所述第二像源出射的所述第二成像光的偏振方向。
  20. 根据权利要求19所述的装置，其特征在于，
    所述第二偏振转换器件位于所述第二像源的出射表面上或者所述半透半反元件的第二表面上。
  21. 根据权利要求20所述的装置，其特征在于，
    所述光学元件还用于透射从所述半透半反元件的第二表面透射的所述第一成像光，其中，所述第二偏振转换器件位于所述半透半反元件的第二表面上。
  22. 根据权利要求21所述的装置，其特征在于，所述光学元件包括第三偏振转换器件和透射平板；
    所述第三偏振转换器件用于透射从所述半透半反元件的第二表面透射的所述第一成像光，并反射所述第二像源出射的所述第二成像光，所述透射平板用于透射所述第三偏振转换器件透射的所述第一成像光。
  23. 根据权利要求19所述的装置，其特征在于，
    所述第一偏振转换器件和所述第二偏振转换器件为1/4波片。
  24. 根据权利要求13至23中任一项所述的装置，其特征在于，
    从所述防尘罩出射所述第一成像光和所述第二成像光的偏振方向相同。
  25. 根据权利要求13所述的装置，其特征在于，
    所述第一像源出射的所述第一成像光为偏振光，所述第二像源出射的所述第二成像光为偏振光，所述偏振光包括P光和S光。
  26. 一种交通工具，其特征在于，包括如权利要求1至25中任一项所述的显示设备。
PCT/CN2022/127532 2022-01-21 2022-10-26 一种显示装置和交通工具 WO2023138138A1 (zh)

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