WO2023061078A1 - 显示装置、电子设备以及交通工具 - Google Patents

显示装置、电子设备以及交通工具 Download PDF

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Publication number
WO2023061078A1
WO2023061078A1 PCT/CN2022/116030 CN2022116030W WO2023061078A1 WO 2023061078 A1 WO2023061078 A1 WO 2023061078A1 CN 2022116030 W CN2022116030 W CN 2022116030W WO 2023061078 A1 WO2023061078 A1 WO 2023061078A1
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WO
WIPO (PCT)
Prior art keywords
light
display device
polarized light
transflective
imaging light
Prior art date
Application number
PCT/CN2022/116030
Other languages
English (en)
French (fr)
Inventor
赵晗
毛磊
黄志勇
李肖
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to JP2024512172A priority Critical patent/JP2024534144A/ja
Priority to KR1020247005263A priority patent/KR20240029099A/ko
Priority to EP22880024.9A priority patent/EP4361706A1/en
Publication of WO2023061078A1 publication Critical patent/WO2023061078A1/zh
Priority to US18/633,008 priority patent/US20240255757A1/en

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/02—Catoptric systems, e.g. image erecting and reversing system
    • G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
    • 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
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/0977—Reflective elements
    • G02B27/0983—Reflective elements being curved
    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/10—Mirrors with curved faces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2073—Polarisers in the lamp house
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/28—Reflectors in projection beam
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/604—Polarised screens
    • 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
    • G02B2027/013—Head-up displays characterised by optical features comprising a combiner of particular shape, e.g. curvature
    • 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
    • G02B2027/014—Head-up displays characterised by optical features comprising information/image processing systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements

Definitions

  • the present application relates to the field of image display, in particular to a display device, electronic equipment and vehicles.
  • Image display technology is currently developing rapidly, and the display size is also getting larger and larger.
  • the cost of a display system with a large screen eg, more than 80 inches
  • Laser TV can achieve a projection effect of more than 100 inches, but it needs a curtain (Fresnel screen) with specific functions to enhance the viewing experience, and it takes up a lot of space.
  • existing projectors often require a large projection distance and cannot produce enlarged images at close range.
  • embodiments of the present application provide a display device, a vehicle, and an electronic device to provide a large-size display function.
  • the display device provided by the present application may include an image generating unit, a transflective member, and a curved mirror.
  • the image generating unit is used (configured to) generate imaging light containing image information, and project the imaging light to the transflective member, and the transreflective member is used to reflect the imaging light to the curved mirror, and the curved surface
  • the mirror is used to reflect the received imaging light to the transflective element, and the transflective element is also used to transmit the imaging light reflected by the curved mirror. Therefore, the light reflected by the curved mirror can pass through the transflector and enter the human eye, and the human eye can see an enlarged virtual image through the light, which meets the demand for large-scale viewing. Different from the real image display method, the virtual image does not need a specific screen to undertake, so it can realize the effect of displaying a large-scale image in a small space.
  • the above-mentioned transflective member can not only reflect the imaging light to the curved mirror, but also transmit the imaging light reflected by the curved mirror, that is, the imaging light reflected by the transflective member at the curved mirror In the optical path where it is located, and can transmit the imaging light reflected by the curved mirror. Therefore, the transflective member can be located closer to the curved mirror (it can be located within the focal length of the curved mirror), which can effectively fold the optical path and reduce the volume of the display device.
  • the incident angles of the imaging light reflected by the transflective member and the imaging light transmitted are different.
  • the transflective element can realize the above functions through coating.
  • the above-mentioned transflective member may transmit imaging light having an angle smaller than a first preset angle, and reflect imaging light having an angle larger than a second preset angle.
  • the first preset angle is 30 degrees
  • the second preset angle is 45 degrees.
  • the polarization direction of the imaging light reflected by the transflective element is different from the polarization direction of the transmitted imaging light.
  • the above-mentioned transflective element includes a polarized transflective element, and the polarization direction of the imaging light reflected by the polarized transflective element is perpendicular to the polarization direction of the transmitted imaging light.
  • the imaging light reflected by the polarized transflective element is P-polarized light
  • the transmitted imaging light is S-polarized light
  • the imaging light reflected by the polarized transflective element is S-polarized light
  • the transmitted imaging light is P-polarized light.
  • the transflective element includes a polarized transflective element
  • the imaging light reflected by the polarized transflective element is circularly polarized light or elliptically polarized light
  • the imaging light transmitted by the polarized transflective element is linear polarized light
  • the display device further includes a first polarization conversion device, the first polarization conversion device is located on the optical path between the transflective member and the curved mirror, and is used to change the The polarization direction of the imaging light reflected by the mirror and/or the polarization direction of the imaging light reflected from the curved mirror.
  • the display device further includes a diffusion element, the diffusion element is located on the optical path between the image generation unit and the transflective member, and is used to perform imaging light projected by the image generation unit. diffusion.
  • the above-mentioned diffusion element can play the role of uniform light, and avoid the situation that the displayed image is locally too bright or too dark.
  • the display device further includes a first polarizer located on the light exit side of the diffusion element, and the first polarizer transmits S-polarized light or P-polarized light.
  • the above-mentioned first polarizer can make S-polarized light or P-polarized light transmitted to the transflective member for transmission or reflection.
  • the reflective member in the display device includes a semi-reflective film and a second polarizer; the semi-reflective film reflects part of the imaging light to the curved mirror, and transmits another part of the imaging light. light to the second polarizer; the second polarizer absorbs the other part of the incident imaging light and transmits the imaging light reflected by the curved mirror.
  • the second polarizer may be referred to as a polarizing absorbing film.
  • the semi-reflective and semi-permeable membrane may be a semi-reflective and semi-transparent wave plate.
  • the imaging light reflected by the transflective film in the transflective member is P polarized light
  • the imaging light absorbed by the second polarizer is P polarized light and the transmitted imaging light is S polarized light
  • the imaging light reflected by the transflective film is S polarized light
  • the imaging light absorbed by the second polarizer is S polarized light
  • the transmitted imaging light is P polarized light
  • the transflective film and the second polarizer are attached to each other.
  • the above-mentioned transflective film and the second polarizer as a whole can realize the function of the above-mentioned polarized transflective member, that is, reflect P-polarized light and transmit S-polarized light, or reflect S-polarized light and transmit P-polarized light.
  • the imaging light reflected by the semi-reflective film in the transflective member is circularly polarized light or elliptically polarized light
  • the imaging light transmitted by the semi-reflective film is circularly polarized light or elliptically polarized light .
  • the transflective member further includes a second polarization conversion device located between the transflective film and the second polarizer, the second polarization conversion device is used to change the The polarization direction of circularly polarized light or elliptically polarized light transmitted by the transflective member and/or the polarization direction of circularly polarized light or elliptically polarized light reflected from the curved mirror.
  • the transflective film, the second polarization conversion device and the second polarizer are attached to each other.
  • the display device further includes a third polarization conversion device located on the light output side of the first polarizer, the third polarization conversion device is used to change the polarization direction of the polarized light transmitted from the first polarizer .
  • the imaging light projected by the image generating unit is linearly polarized light, circularly polarized light or elliptically polarized light.
  • the first polarization conversion device in the display device is also located on the optical path between the polarized transflective member and the image generation unit, for changing the imaging light from the image generation unit direction of polarization.
  • the first polarizer can be arranged in parallel with the polarizing transflective element or bonded together with the polarizing transflective element, so that the overall structure is more compact.
  • the first polarization conversion device may be located on the optical path between the polarization transflective member and the diffusion element, the polarizer, and the third polarization conversion device, that is, the imaging light emitted by the image generating unit may pass through the diffusion element, The polarizer and the third polarization conversion device reach the first polarization conversion device, and the first polarization conversion device transmits the imaging light to the polarization transflector.
  • the curved mirror is a multi-focal curved mirror or a free-form mirror.
  • the image generation unit in the display device includes a light source, an imaging module, and a projection lens.
  • the light source is used to output light beam to the image module;
  • the imaging module is used to generate imaging light containing image information according to the light beam;
  • the projection lens is used to project the imaging light to the transflective member.
  • the above-mentioned transflective member is located within the focal length of the curved mirror. Furthermore, the image reflected by the transflective member can be magnified and displayed by the curved mirror.
  • the first polarization conversion device, the second polarization conversion device, and the third polarization conversion device may be a 1/4 wave plate, two 1/8 wave plates or an optical rotator.
  • the present application provides an electronic device, which includes the display device described in the first aspect.
  • the present application further provides a vehicle, which includes the display device as described in the first aspect.
  • the display device is installed on a seat of the vehicle.
  • Fig. 1a is a schematic diagram of a display device disclosed in an embodiment of the present application as a common display;
  • Fig. 1b is a schematic diagram of a display device disclosed in an embodiment of the present application as a TV;
  • Fig. 1c is a schematic diagram of a display device disclosed in an embodiment of the present application as a vehicle-mounted display;
  • FIG. 2 is a schematic structural diagram of a display device disclosed in an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of an image generating unit in a display device provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • FIG. 12 is a schematic circuit diagram of a display device provided by an embodiment of the present application.
  • the present application provides a display device, electronic equipment and vehicles.
  • the display device can be used as an ordinary display (such as shown in 100a in FIG. 1a ) for office use, and can also be used as a TV (such as shown in 100b in FIG.
  • the display device is installed on the seat of the vehicle).
  • the physical size, display size, and resolution of the display device can be adjusted according to usage scenarios.
  • the display device may also be referred to as a display system or a virtual image display device.
  • Units or modules included in the display device may be referred to as components or mechanisms.
  • FIG. 2 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • the display device includes a picture generation unit (Picture Generation Unit, PGU) 110, a transflector 120 and a curved mirror 130.
  • the image generating unit 110 is used to generate imaging light containing image information, and project the imaging light to the transflective member 120;
  • the imaging light is reflected to the concave surface of the curved mirror 130, and the curved mirror 130 is used to reflect the received imaging light to the transflective member 120, and the transflective member 120 is also used to transmit the imaging light reflected by the curved mirror 130.
  • the concave surface of the curved mirror 130 is used as a reflective surface, which is used to amplify the image reflected by the transflective member 120 (for example, the transflective member 120 is located within the focal length of the curved mirror 130), Therefore, the above-mentioned display device can zoom in on the image generated by the image generating unit 110 .
  • the user's eyes can receive the light reflected by the curved mirror 130, so as to observe the magnified virtual image (the reverse extension line of the actual light).
  • the display device provided by this embodiment can display virtual images, and thus can display large-size images without requiring a specific screen or occupying a large space.
  • the display device provided in this embodiment may include a diffusion element (which may be a diffusion screen or a diffusion plate) 140, and the diffusion element 140 is located between the image generating unit 110 and the transflective member 120. On the optical path, it is used to diffuse the imaging light projected by the image generating unit 110 so that the brightness of the displayed image is uniform. For example, the imaging light projected by the image generating unit 110 is diffusely reflected or uniformly transmitted through the diffusion plate.
  • a diffusion element which may be a diffusion screen or a diffusion plate
  • the transflective member 120 may be a coated mirror or a polarized transflective member.
  • the coated mirror can reflect the light whose incident angle is smaller than the first threshold, and transmit the light whose incident angle is larger than the second threshold.
  • the first threshold may be 40 degrees
  • the second threshold may be 50 degrees.
  • FIG. 3 is a schematic structural diagram of an image generating unit in a display device provided by an embodiment of the present application.
  • the image generation unit includes a light source 101 , an imaging module 102 and a projection lens 130 , and the image generation unit can be used in the aforementioned display device, or can be used independently.
  • the light source 101 in this embodiment outputs a light beam (white light) to the imaging module 102 .
  • Imaging module 102 may use beam 1 to generate a source image.
  • the projection lens 103 is used to project the imaging light outward, which may be a short-focus lens.
  • the imaging module 102 in this embodiment can 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), digital light processing (Digital Light Processing, DLP) display or Micro-Electro-Mechanical Systems (Micro-Electro-Mechanical Systems, MEMS) display.
  • LCOS liquid crystal on silicon
  • OLED Organic Light-Emitting Diode
  • LCD liquid crystal display
  • DLP Digital Light Processing
  • MEMS Micro-Electro-Mechanical Systems
  • the light source 101 in this embodiment may include a three-color light source (a blue light source 1011, a green light source 1012, and a red light source 1013), and the monochromatic light emitted by the three-color light source (which may be called a three-primary light source) is mixed and the white light output is input to the The imaging module 102, thereby generating a source image.
  • the light source 101 may further include a first wave plate 1014 and a second wave plate (transflective wave plate) 1015 .
  • the blue light source 1011, the green light source 1012, and the red light source 1013 may be light-emitting diode (Light-Emitting Diode, LED) light sources, and may also be laser diode light sources.
  • the first wave plate 1014 is located on the optical path of the light (light) output by the light sources 1011 and 1012, and is used for transmitting and reflecting the light.
  • the first wave plate 1014 transmits the blue light emitted by the light source 1011, reflects the green light emitted by the light source 1012, and the reflected light and transmitted light are mixed and then input to the second wave plate 1015.
  • the second wave plate 1015 is also located on the optical path of the three-color light output by the three-color light source (1011, 1012, 1013), and is used for transmitting and reflecting the three-color light.
  • the second wave plate 1015 transmits the blue light emitted by the light source 1011, transmits the green light emitted by the light source 1012, and reflects and transmits the red light emitted by the light source 1013.
  • the reflected red light and the two transmission lights (blue light and green light) Light) is input into the imaging module 102 after being mixed.
  • FIG. 4 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • the display device includes an image generating unit 210, a transflective member (in this embodiment, a transflective polarizer 221), a curved mirror 230, a diffusion element 240, and a first polarization conversion device (in this embodiment, a 1/4 wave plate 250) and the first polarizer (this embodiment is the S polarizer 241).
  • a transflective member in this embodiment, a transflective polarizer 221
  • a curved mirror 230 the diffusion element 240
  • a first polarization conversion device in this embodiment, a 1/4 wave plate 250
  • the first polarizer this embodiment is the S polarizer 241
  • the functions of the image generation unit 210 , the curved mirror 230 , and the diffusion element 240 are the same as those of the image generation unit 110 , the curved mirror 130 , and the diffusion element 140 in the above-mentioned embodiments, and will not be repeated here.
  • the transmissive P-anti-S polarizer 221 can reflect S-polarized light and transmit P-polarized light, and the polarization directions of S-polarized light and P-polarized light are perpendicular to each other.
  • the 1/4 wave plate 250 is located on the optical path between the transmissive P and anti-S polarizer 221 and the curved mirror 230, and it is used to change the polarization direction of the imaging light reflected from the transmissive P and anti-S polarizer 221 and that reflected from the curved mirror 230.
  • the polarization direction of the imaged light is located on the light emitting side of the curved mirror 230 and covers the curved mirror 230 .
  • the S polarizer 241 is located on the light emitting side of the diffusion element 240 and transmits S polarized light.
  • the S polarized light in the imaging light (the polarization direction in the figure is perpendicular to the paper) is filtered out, so that the S polarized light
  • the light is transmitted to the transmissive P anti-S polarizer 221 .
  • the S-polarized light is reflected by the P-anti-S polarizing plate 221 to the 1/4 wave plate 250, and the 1/4 wave plate 250 performs the first phase delay on the incident S-polarized light, and the S-polarized light becomes circularly polarized light or elliptically polarized light .
  • the curved mirror 230 reflects the polarized light with the first phase delay, that is, the reflected polarized light is incident on the 1/4 wave plate 250 again, and the 1/4 wave plate 250 performs a second phase delay on the polarized light reflected by the curved mirror 230, Circularly polarized light or elliptically polarized light becomes P polarized light.
  • the incident S polarized light becomes P polarized light (the polarization direction in the figure is parallel to the paper surface) and exits, and the P polarized light can pass through the P and reflect the S polarizing plate 221 When it is transmitted to the human eye, the human eye can see the magnified virtual image.
  • the polarizer can be located in the image generating unit 210 (for example, on the light exit side of the projection lens of the image generating unit 210), and at this time, the image generating unit 210 directly projects S polarized light to the diffusion element 240, The polarizing plate on the light exit side of the diffusing element 240 is also unnecessary.
  • the 1/4 wave plate 250 can cover the entire curved mirror 230, so that the light reflected by the transmissive P-anti-S polarizer 220 and the light reflected by the curved mirror 230 both pass through the 1/4 wave plate to improve light utilization.
  • FIG. 5 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • the display principle of the display device provided in FIG. 5 is the same as that in FIG. 4 , except that the transflective element is a transflective P polarizer 321 in this embodiment, and the first polarizer is a P polarizer 341 in this embodiment.
  • the functions of the image generation unit 310 , the curved mirror 330 , and the diffusion element 340 are the same as those of the image generation unit 210 , the curved mirror 230 , and the diffusion element 240 in the above-mentioned embodiments, and will not be repeated here.
  • the transmissive S-reflective P polarizer 321 can reflect P-polarized light and transmit S-polarized light.
  • the P polarizer 341 is located on the light emitting side of the diffusion element 340 and transmits P polarized light. P polarizers can also pass through P polarizers.
  • the P polarized light in the imaging light (the polarization direction in the figure is parallel to the paper surface) is filtered out, so that the P polarized light
  • the light is transmitted to a transmissive S-inverted P polarizer 321 .
  • the S-reflecting P polarizer 321 reflects the P-polarized light to the 1/4 wave plate 350, and the 1/4 wave plate 350 performs the first phase delay on the incident P-polarized light, and the P-polarized light becomes circularly polarized light or elliptically polarized light .
  • the curved mirror 330 reflects the polarized light with the first phase delay, that is, the reflected polarized light is incident on the 1/4 wave plate 350 again, and the 1/4 wave plate 350 performs a second phase delay on the polarized light reflected by the curved mirror 330, Circularly polarized light or elliptically polarized light becomes S polarized light.
  • the incident P polarized light becomes S polarized light and exits, and the S polarized light can be transmitted from the S-transmitting P polarizing plate 321 to the human eye, and the human eye can see it Magnified virtual image.
  • FIG. 6 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • the display device shown in Figure 6 is similar to the display device shown in Figure 4, except that the transflective member in the embodiment of Figure 6 includes a semi-reflective and semi-transparent film 421 and a second polarizer (P polarizer 422), as shown in Figure 4
  • the transflective member in the illustrated embodiment is a transflective S polarizer 221 .
  • the functions of the image generation unit 410 , the curved mirror 430 , and the diffusion element 440 are the same as those of the image generation unit 210 , the curved mirror 230 , and the diffusion element 240 in the above-mentioned embodiments, and will not be repeated here.
  • the P polarizer 422 can transmit the P polarized light, but the S polarized light cannot be transmitted (absorbed).
  • the transflective film 421 can transmit part of the light and reflect part of the light.
  • the S polarized light (the polarization direction is perpendicular to the paper surface) in the imaging light is filtered out , so that the S-polarized light is transmitted to the transflective film 421 .
  • the semi-reflective film 421 reflects part of the S polarized light to the 1/4 wave plate 450, and the 1/4 wave plate 450 performs the first phase delay on the incident S polarized light, and the S polarized light becomes circularly polarized light or elliptically polarized light .
  • the transflective film 421 transmits part of the S polarized light to the P polarizer 422 , and this part of the S polarized light cannot pass through the P polarizer 422 , and thus is absorbed by the P polarizer 422 .
  • the curved mirror 430 reflects the polarized light with the first phase delay, that is, the reflected polarized light is incident on the 1/4 wave plate 450 again, and the 1/4 wave plate 450 performs a second phase delay on the polarized light reflected by the curved mirror 430,
  • circularly polarized light or elliptically polarized light becomes P polarized light (the polarization direction is parallel to the paper surface).
  • the incident S polarized light becomes P polarized light and exits, and the P polarized light can be transmitted to the human eye from the transflective film 221 and the P polarizer 222, and the human eye You can see the magnified virtual image.
  • the display device shown in Fig. 6 realizes the function of transflecting P and anti-S polarizing plate 221 by semi-reflecting and semi-transmitting film 421 and P polarizing plate 422, and semi-reflecting and semi-transmitting film 421 and P polarizing plate 422 can Made into a large area, the cost is relatively low.
  • FIG. 7 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • the display device shown in Figure 7 is similar to the display device shown in Figure 5, and the difference is that the transflective member in the embodiment of Figure 7 is a semi-reflective film 521 and a second polarizer (S polarizer 522), and Figure 5 implements An example of a transflective member is a transflective P polarizer 321 .
  • the functions of the image generating unit 510 , the curved mirror 530 , and the diffusion element 540 are the same as those of the image generation unit 310 , the curved mirror 330 , and the diffusion element 340 in the above embodiment, and will not be repeated here.
  • the S polarizer 522 can transmit the S polarized light, but the P polarized light cannot be transmitted (absorbed), and it can also be referred to as the S polarized plate.
  • the transflective film 521 can transmit part of the light and reflect part of the light.
  • the P polarized light (the polarization direction is perpendicular to the paper surface) in the imaging light is filtered out , so that the P polarized light is transmitted to the transflective film 521 .
  • the transflective film 521 reflects part of the P-polarized light to the 1/4 wave plate 550, and the 1/4 wave plate 550 performs the first phase delay on the incident P-polarized light, and the P-polarized light becomes circularly polarized light or elliptically polarized light .
  • the transflective film 521 transmits part of the P polarized light to the S polarizer 522 , and this part of the S polarized light cannot pass through the S polarizer 522 , and thus is absorbed by the S polarizer 522 .
  • the curved mirror 530 reflects the polarized light with the first phase delay, that is, the reflected polarized light enters the 1/4 wave plate 550 again, and the 1/4 wave plate 550 performs a second phase delay on the polarized light reflected by the curved mirror 530,
  • circularly polarized light or elliptically polarized light becomes S-polarized light (the polarization direction is parallel to the paper surface).
  • the incident P-polarized light becomes S-polarized light and exits, and the S-polarized light can be transmitted to the human eye from the semi-reflective and semi-transparent film 521 and the S polarizing plate 522. You can see the magnified virtual image.
  • the display device shown in FIG. 7 realizes the function of the transflective P polarizer 321 through the transflective film 521 and the S polarizer 522, and the semireflective film 521 and the S polarizer 522 can Made into a large area, the cost is relatively low.
  • FIG. 8 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • the display device includes an image generating unit 610, a transflective element, a curved mirror 630, a diffusion element 640, a first polarization conversion device (a quarter wave plate 650 in this embodiment), a third polarization conversion device (This embodiment is a 1/4 wave plate 642) and the first polarizer (This embodiment is an S polarizer 641).
  • the transflective element includes a transflective film 621 , a second polarization conversion device (1/4 wave plate 622 in this embodiment) and a second polarizer (P polarizer 623 ).
  • the functions of the image generation unit 610 , the curved mirror 630 , and the diffusion element 640 are the same as those of the image generation unit 110 , the curved mirror 130 , and the diffusion element 140 in the above-mentioned embodiments, and will not be repeated here.
  • the S polarizer 641 can transmit S polarized light, but P polarized light cannot pass through (P polarized light is absorbed).
  • the P polarizer 623 can transmit P polarized light, but cannot transmit S polarized light (S polarized light is absorbed).
  • the 1/4 wave plate 650 is located on the optical path between the semi-reflective film 621 and the curved mirror 630, and it is used to change the polarization direction of the imaging light reflected from the semi-reflective film 621 and the imaging light reflected from the curved mirror 630 direction of polarization.
  • the quarter-wave plate 642 is located on the optical path between the S polarizer 641 and the transflective film 621 , and is used to change the polarization direction of the imaging light transmitted by the S polarizer 641 .
  • the quarter-wave plate 622 is located on the optical path between the semi-reflective film 621 and the P polarizer 623 , and is used to change the polarization direction of the imaging light transmitted from the semi-reflective film 621 .
  • the S polarized light in the imaging light is filtered out, and after the S polarized light is transmitted through the 1/4 wave plate 642, the The polarization direction of the light, in this embodiment, the S-polarized light becomes left-handed circularly polarized light or elliptically polarized light (left-handed polarized light for short) and is emitted.
  • the left-handed polarized light is reflected and transmitted by the transflective film 621 , and part of the transmitted light passes through the 1/4 wave plate 650 to change the polarization direction again.
  • the left-handed circularly polarized light becomes S-polarized light and is emitted.
  • the S-polarized light cannot pass through the P polarizer 623 , that is, it is absorbed by the P polarizer 623 .
  • Another part of the light (left-handed polarized light) reflected by the transflective film 621 on the left-handed polarized light passes through the 1/4 wave plate 650 to change the polarization direction again.
  • the left-handed polarized light becomes linearly polarized light (such as S-polarized light)
  • the linearly polarized light is reflected by the curved mirror 630 and then transmitted through the 1/4 wave plate 650 again.
  • the linearly polarized light becomes right-handed polarized light after passing through the 1/4 wave plate 650 .
  • the effect of the left-handed polarized light passing through the 1/4 wave plate 650 twice is equivalent to passing through the 1/2 wave plate once.
  • right-handed polarized light becomes P polarized light after passing through 1/4 wave plate 622, and P polarized light can transmit P polarized plate 623 (the polarization direction is parallel to the paper surface), and the transmitted P polarized light is incident on the human body. Human eyes can see the magnified virtual image.
  • FIG. 9 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • the display device includes an image generating unit 710, a transflective element, a curved mirror 730, a diffusion element 740, a first polarization conversion device (1/4 wave plate 750 in this embodiment), a third polarization conversion device (This embodiment is a 1/4 wave plate 770) and the first polarizer (This embodiment is a P polarizer 741).
  • the transflective element in this embodiment includes a transflective film 721 , a second polarization conversion device (1/4 wave plate 722 in this embodiment) and a second polarizer (S polarizer 723 ).
  • the functions of the image generation unit 710 , the curved mirror 730 , and the diffusion element 740 are the same as those of the image generation unit 110 , the curved mirror 130 , and the diffusion element 140 in the above-mentioned embodiments, and will not be repeated here.
  • the S polarizer 723 can transmit S polarized light, but cannot transmit P polarized light (P polarized light is absorbed).
  • the P polarizer 741 can transmit P polarized light, but cannot transmit S polarized light (S polarized light is absorbed).
  • the 1/4 wave plate 750 is located on the optical path between the semi-reflective film 721 and the curved mirror 730, and it is used to change the polarization direction of the imaging light reflected from the semi-reflective film 721 and the imaging light reflected from the curved mirror 730 direction of polarization.
  • the quarter-wave plate 742 is located on the optical path between the P polarizer 741 and the transflective film 721 , and is used to change the polarization direction of the imaging light transmitted by the S polarizer 741 .
  • the quarter-wave plate 722 is located on the optical path between the semi-reflective film 721 and the S polarizer 723 , and is used to change the polarization direction of the imaging light transmitted from the semi-reflective film 721 .
  • the P polarized light in the imaging light is filtered out, and after the P polarized light is transmitted through the 1/4 wave plate 742, the The polarization direction of the light, in this embodiment, the S-polarized light becomes right-handed circularly polarized light or elliptically polarized light (referred to as right-handed polarized light) and is emitted.
  • right-handed polarized light right-handed circularly polarized light or elliptically polarized light
  • the left-handed polarized light is reflected and transmitted by the transflective film 721 , and part of the transmitted light passes through the 1/4 wave plate 750 to change the polarization direction again.
  • the left-handed circularly polarized light becomes S-polarized light, and the S-polarized light cannot pass through the P polarizer 723 , that is, it is absorbed by the P polarizer 723 .
  • the left-handed polarized light is reflected by the transflective film 721 and another part of the light (left-handed polarized light) passes through the 1/4 wave plate 750 to change the polarization direction again.
  • the left-handed polarized light becomes linearly polarized light (such as P polarized light)
  • the linearly polarized light is reflected by the curved mirror 730 and then transmitted through the 1/4 wave plate 750 again.
  • the linearly polarized light becomes right-handed polarized light after passing through the 1/4 wave plate 750 .
  • the effect of the left-handed polarized light passing through the 1/4 wave plate 750 twice is equivalent to passing through the 1/2 wave plate once.
  • right-handed polarized light becomes P polarized light after passing through 1/4 wave plate 722, and P polarized light can transmit P polarized plate 723 (the polarization direction is parallel to the paper surface), and the transmitted P polarized light is incident on the human body. Human eyes can see the magnified virtual image.
  • FIG. 10 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • the display device includes an image generating unit 810, a transflective element, a curved mirror 830, a diffusion element 840, a first polarization conversion device (a quarter wave plate 850 in this embodiment), a third polarization conversion device (This embodiment is a 1/4 wave plate 842) and the first polarizer (This embodiment is an S polarizer 841).
  • the transflective element includes a transmissive S-reflective P polarizing film 821 .
  • the functions of the image generation unit 810 , the curved mirror 830 , and the diffusion element 840 are the same as those of the image generation unit 610 , the curved mirror 630 , and the diffusion element 640 in the above-mentioned embodiments, and will not be repeated here.
  • the S polarizer 841 can transmit S polarized light, but P polarized light cannot pass through (P polarized light is absorbed).
  • the S-transmitting and P-polarizing film 821 can transmit S-polarized light and reflect P-polarized light.
  • the 1/4 wave plate 850 is located on the optical path between the S-reflective P polarizing film 821 and the curved mirror 830, and it is used to change the polarization direction of the imaging light reflected from the S-reflective P polarizing film 821 and the polarized light reflected from the curved mirror 830. The polarization direction of the imaged light.
  • the 1/4 wave plate 850 is also located on the optical path between the 1/4 wave plate 842 and the S-reflective P polarizing film 821, which is used to change the polarization direction of the imaging light incident from the 1/4 wave plate 842.
  • the 1/4 wave plate 842 is located on the optical path between the S polarizer 841 and the 1/4 wave plate 850 , which is used to change the polarization direction of the imaging light transmitted by the S polarizer 841 .
  • the S polarized light in the imaging light is filtered out, and after the S polarized light is transmitted through the 1/4 wave plate 842, the The polarization direction of the light, in this embodiment, the S-polarized light becomes left-handed circularly polarized light or elliptically polarized light (left-handed polarized light for short) and is emitted.
  • the polarization direction is changed.
  • the left-handed polarized light becomes P-polarized light and is emitted, and the P-polarized light is reflected by the S-transmissive P-polarizing film 821 and passes through the 1/4 wave plate 850 again to transmit the right-handed polarized light.
  • the right-handed polarized light After the right-handed polarized light is reflected by the curved mirror 830 , it is transmitted through the 1/4 wave plate 850 again. At this time, the right-handed polarized light passes through the 1/4 wave plate 850 and becomes S-polarized light (the polarization direction is perpendicular to the paper surface). The effect of polarized light passing through the 1/4 wave plate 850 twice can be equivalent to passing through the 1/2 wave plate once.
  • the transmitted S-polarized light is incident on the human eye, and the human eye can watch the magnified virtual image.
  • the 1/4 wave plate 850 in the display device provided by this embodiment does not directly cover the curved mirror 830, but is arranged in parallel with the transmissive S-reflective P polarizing film 821, which is relatively easy to install , the overall cost is lower.
  • transmissive S-reflective P polarizing film 821 can be realized by using the transflective film 521 and the S polarizing film 522 in the embodiment shown in FIG. 5 .
  • the above-mentioned transmissive S-reflective P polarizing film 821 can be realized by using the transflective film 521 and the S polarizing film 522 in the embodiment shown in FIG. 5 .
  • FIG. 11 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • the display device includes an image generating unit 910, a transflective element, a curved mirror 930, a diffusion element 940, a first polarization conversion device (a quarter wave plate 950 in this embodiment), a third polarization conversion device (This embodiment is a 1/4 wave plate 942) and the first polarizer (This embodiment is a P polarizer 941).
  • the transflective element includes a transmissive P-reflective S polarizing film 921 .
  • the functions of the image generation unit 910 , the curved mirror 930 , and the diffusion element 940 are the same as those of the image generation unit 810 , the curved mirror 830 , and the diffusion element 840 in the above-mentioned embodiments, and will not be repeated here.
  • the P polarizer 941 can transmit P polarized light, but cannot transmit S polarized light (S polarized light is absorbed).
  • the transmissive P-anti-S polarizing film 921 can transmit P polarized light and reflect S polarized light.
  • the P-transmitting and S-transmitting polarizing film 921 can be arranged in parallel with the 1/4 wave plate 950 .
  • the 1/4 wave plate 950 is located on the optical path between the transmissive P anti-S polarizing film 921 and the curved mirror 930, and it is used to change the polarization direction of the imaging light reflected from the transmissive P anti-S polarizing film 921 and the polarized light reflected from the curved mirror 930.
  • the polarization direction of the imaged light is also located on the optical path between the 1/4 wave plate 942 and the transmissive P and anti-S polarizing film 921 , which is used to change the polarization direction of the imaging light incident from the 1/4 wave plate 942 .
  • the 1/4 wave plate 942 is located on the optical path between the P polarizer 941 and the 1/4 wave plate 950 , which is used to change the polarization direction of the imaging light transmitted by the P polarizer 941 .
  • the P polarized light in the imaging light is filtered out, and after the P polarized light is transmitted through the 1/4 wave plate 942, the The polarization direction of the light, in this embodiment, the P-polarized light becomes right-handed circularly polarized light or elliptically polarized light (referred to as right-handed polarized light) and is emitted.
  • the polarization direction is changed.
  • the right-handed polarized light becomes S-polarized light, and the S-polarized light is reflected by the P-transmitting S-polarizing film 921 and then passes through the 1/4 wave plate 950 to be transmitted as left-handed polarized light.
  • the left-handed polarized light After the left-handed polarized light is reflected by the curved mirror 930 , it is transmitted through the 1/4 wave plate 950 again. At this time, the left-handed polarized light passes through the 1/4 wave plate 950 and becomes P-polarized light (the polarization direction is parallel to the paper surface).
  • the effect of polarized light passing through the 1/4 wave plate 950 twice can be equivalent to passing through the 1/2 wave plate once.
  • the transmitted P-polarized light is incident on the human eye, and the human eye can watch the magnified virtual image.
  • the above-mentioned transparent P-anti-S polarizing film 921 can be realized by the transflective film 421 and the P polarizing plate 422 in the display device shown in FIG. 6 .
  • the above-mentioned transparent P-anti-S polarizing film 921 can be realized by the transflective film 421 and the P polarizing plate 422 in the display device shown in FIG. 6 .
  • the polarizing plate may be referred to as a polarizing plate, a polarizer, a polarizer, a polarizing film or a polarizing device.
  • a P polarizer may be referred to as a P polarizer film
  • a transmissive S-reflective P polarizer may be referred to as a transmissive S-reflective P polarizer.
  • FIG. 12 is a schematic circuit diagram of a display device provided by an embodiment of the present application.
  • the circuit in the display device mainly includes a processor 1001, a memory 1002, a controller area network (Controller Area Network, CAN) transceiver 1003, an audio module 1004, a video module 1005, a power supply module 1006, and a wireless communication module 1007, an I/O interface 1008, a video interface 1009, a touch unit 1010, a display circuit 1028, an imaging device 1029, and the like.
  • the processor 1001 and its surrounding components such as memory 1002, CAN transceiver 1003, audio module 1004, video module 1005, power module 1006, wireless communication module 1007, I/O interface 1008, video interface 1009, touch control unit 1010 1.
  • the display circuit 1028 can be connected through a bus.
  • the processor 1001 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 processor 1001 includes one or more processing units, for example: the processor 1001 may include an application processor (Application Processor, AP), a modem processor, a graphics processing unit (Graphics Processing Unit, GPU), an image signal processing Image Signal Processor (ISP), controller, video codec, digital signal processor (Digital Signal Processor, DSP), baseband processor, and/or neural network processor (Neural-Network Processing Unit, NPU), etc. .
  • an application processor Application Processor, AP
  • modem processor a graphics processing unit
  • ISP image signal processing Image Signal Processor
  • controller video codec
  • digital signal processor Digital Signal Processor
  • DSP Digital Signal Processor
  • baseband processor baseband processor
  • neural network processor Neral-Network Processing Unit, NPU
  • different processing units may be independent devices, or may be integrated in one or more processors.
  • a memory may also be provided in the processor 1001 for storing instructions and data.
  • the memory in processor 1001 is a cache memory.
  • the memory may hold instructions or data that the processor 1001 has just used or recycled. If the processor 1001 needs to use the instruction or data again, it can be called directly from the memory. Repeated access is avoided, and the waiting time of the processor 1001 is reduced, thereby improving the efficiency of the system.
  • the display device may further include a plurality of input/output (Input/Output, I/O) interfaces 1008 connected to the processor 1001 .
  • the interface 1008 may include, but is not limited to, an integrated circuit (Inter-Integrated Circuit, I2C) interface, an integrated circuit built-in audio (Inter-Integrated Circuit Sound, I2S) interface, a pulse code modulation (Pulse Code Modulation, PCM) interface, a general asynchronous transceiver transmission Universal Asynchronous Receiver/Transmitter (UART) 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, etc.
  • I2C Inter-Integrated Circuit
  • I2S integrated circuit built-in audio
  • PCM pulse code modulation
  • UART Universal Asynchronous Receiver/Transmitter
  • MIPI Mobile Industry Processor Interface
  • GPIO General-Purpose Input/
  • the above-mentioned I/O interface 1008 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 keys, brightness adjustment keys, power-on/off keys, etc.).
  • the memory 1002 may include an internal memory, and may also include an external memory (such as a Micro SD card).
  • the memory 1002 may be used to store computer executable program codes, and the executable program codes include instructions.
  • the memory 1002 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 memory 1002 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 processor 1001 executes various functional applications and data processing of the display device by executing instructions stored in the memory 1002 and/or instructions stored in the memory provided in the processor 1001 .
  • the above-mentioned display device also includes a CAN transceiver 1003, and the CAN transceiver 1003 can be connected to the CAN bus (CAN BUS) of the car.
  • CAN BUS CAN bus
  • the display device can communicate with the car entertainment system (music, radio, video module), vehicle status system, etc.
  • the user can activate the car music playing function by operating the display device.
  • the vehicle status system can send vehicle status information (vehicle doors, safety belts, etc.) to the display device for display.
  • the display device may implement audio functions through the audio module 1004 and the application processor. Such as music playback, calls, etc.
  • the audio module 1004 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 1004 can also be used for encoding and decoding audio signals, such as playing or recording.
  • the audio module 1004 can be set in the processor 1001 , or some functional modules of the audio module 1004 can be set in the processor 1001 .
  • Video interface 1009 can receive the audio and video of input, and it can specifically 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 (Displayport, DP), low voltage differential signal (Low Voltage Differential Signaling, LVDS) interface, etc., and the video interface 1009 can also output video externally.
  • the display device receives video data sent by the navigation system through the video interface.
  • the video module 1005 can decode the video input by the video interface 1009, 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 processor 1001 may also decode the video input from the video interface 1009, and then output the decoded image signal to the display circuit.
  • the display circuit 1028 and the imaging device 1029 are used to display corresponding images.
  • the video interface 1009 receives input video data (or referred to as a video source), and the video module 1005 performs decoding and/or digital processing to output an image signal to the display circuit 1028, and the display circuit 1028 drives according to the input image signal.
  • the imaging device 1029 images the light beam emitted by the light source 101 to generate a visible image. For example, imaging device 1029 generates a source image, emitting imaging light.
  • the display circuit 1028 and the imaging device 1029 belong to the electronic components in the imaging module 102, and the display circuit 1028 may be called a driving circuit.
  • the power module 1006 is used to provide power for the processor 1001 and the light source 101 according to the input power (such as DC power).
  • the light emitted by the light source 101 can be transmitted to the imaging device 1029 for imaging, thereby forming an image light signal (imaging light).
  • the above-mentioned power supply module 1006 can be connected to a power supply module (such as a power battery) of a car, and the power supply module of the car supplies power to the power supply module 1006 of the display device.
  • a power supply module such as a power battery
  • the wireless communication module 1007 can enable the display device to perform wireless communication with the outside world, which can provide wireless local area networks (Wireless Local Area Networks, WLAN) (such as wireless fidelity (Wireless Fidelity, Wi-Fi) network), Bluetooth (Bluetooth, BT), Global Navigation Satellite System (GNSS), Frequency Modulation (FM), Near Field Communication (NFC), Infrared (IR) and other wireless communication solutions.
  • the wireless communication module 1007 may be one or more devices integrating at least one communication processing module.
  • the wireless communication module 1007 receives electromagnetic waves via the antenna, frequency-modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 1001 .
  • the wireless communication module 1007 can also receive the signal to be sent from the processor 1001, 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 1005 can be received through the wireless communication module 1007 or read from the memory 1002 in addition to being input through the video interface 1009.
  • the terminal device or the vehicle entertainment system receives the video data, and the display device can also read the audio and video data stored in the memory 1002 .
  • the touch unit 1010 can generate a control signal (such as a brightness/contrast adjustment signal) according to the user's touch operation on the touch interface, and then send the control signal to the display circuit 1028 through the processor 201, and the display circuit 1028 adjusts the imaging according to the control signal. Imaging of device 1029, thereby changing the displayed source image.
  • the touch interface may include control keys (volume, brightness, contrast adjustment keys, etc.).
  • the curved mirror in the embodiment of the present application may be a multi-focal free-form mirror. Multi-person viewing is achieved by designing a multi-focus free-form reflector.
  • the vehicles in the embodiments of the present application may be known vehicles such as automobiles, airplanes, ships, and rockets, and may also be new vehicles that will appear in the future.
  • the vehicle may be an electric vehicle, a fuel vehicle or a hybrid vehicle, for example, a pure electric vehicle, an extended-range electric vehicle, a hybrid electric vehicle, a fuel cell vehicle, a new energy vehicle, etc., which are not specifically limited in this application.
  • the electronic equipment in the embodiment of the present application includes equipment installed with a display device, which may include the above-mentioned vehicles, and may also be used as medical equipment, office entertainment equipment, or industrial control equipment, which is not limited in this embodiment.
  • first, second, third and fourth in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances. permutations so that the embodiments described herein can be practiced in sequences not described herein. In order to more clearly reflect the relationship between components in different embodiments, the present application uses the same reference numerals to denote components with the same or similar functions in different embodiments.

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Abstract

一种显示装置，显示装置包括图像生成单元（110）、透反件（120）以及曲面镜（130）。图像生成单元（110）用于生成包含图像信息的成像光，并向透反件（120）投射成像光，透反件（120）用于将成像光反射至曲面镜（130），曲面镜（130）用于反射接收到的成像光至透反件（120），透反件（120）还用于透射曲面镜（130）反射的成像光。因此曲面镜（130）反射的光线可以透过透反件（120），并射入人眼，人眼通过光线可以看到放大的虚像，满足了大尺寸观看的需求。与实像显示方式不同，虚像不需要具体的屏幕去承接，因而可以实现小空间显示大尺寸画面的效果。

Description

显示装置、电子设备以及交通工具
本申请要求于2021年10月14日提交中国国家知识产权局、申请号202111195784.4、申请名称为“显示装置、电子设备以及交通工具”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，尤其涉及一种显示装置、电子设备以及交通工具。
背景技术
图像显示技术目前在快速发展，显示尺寸也越来越大。但是，目前大屏幕的显示系统(如80寸以上)的成本很高。激光电视可以实现100寸以上的投影效果，但是需要具备特定功能的幕布(菲涅尔屏)以提升观看体验，且占地空间很大。另外，现有的投影仪往往需要较大投影距离，无法近距离成放大的图像。
发明内容
鉴于此，本申请实施例提供了一种显示装置、交通工具以及电子设备，以提供大尺寸的显示功能。
第一方面，本申请提供的显示装置可以包括图像生成单元、透反件以及曲面镜。
其中，图像生成单元用于(配置于)生成包含图像信息的成像光，并向所述透反件投射所述成像光，透反件用于将所述成像光反射至所述曲面镜，曲面镜用于反射接收到的成像光至所述透反件，透反件还用于透射所述曲面镜反射的成像光。因此，曲面镜反射的光线可以透过该透反件，并射入人眼，人眼通过该光线可以看到放大的虚像，满足了大尺寸观看的需求。与实像显示方式不同，虚像不需要具体的屏幕去承接，因而可以实现小空间显示大尺寸画面的效果。
另外，在本实施例的方案中，上述透反件不仅可以反射成像光至所述曲面镜，还可以透射所述曲面镜反射的成像光，即透反件位于所述曲面镜反射的成像光所在的光路中，并且可以透射该曲面镜反射的成像光。因此，该透反件可以距离曲面镜的位置较近(可以位于曲面镜的焦距以内)，可以有效的折叠光路，缩小显示装置的体积。
在一个可能的实施方案中，上述透反件反射的成像光和透射的成像光的入射角度不同。其中，透反件可以通过镀膜来实现上述功能。
在一个可能的实施方案中，上述透反件可以对小于第一预设角度的成像光进行透射，对大于第二预设角度的成像光进行反射。例如，第一预设角度为30度，第二预设角度为45度。
在一个可能的实施方案中，上述透反件反射的成像光的偏振方向和透射的成像光的偏振方向不同。
在一个可能的实施方案中，上述透反件包括偏振透反件，所述偏振透反件反射的成像光 的偏振方向和透射的成像光的偏振方向相互垂直。例如，偏振透反件反射的成像光为P偏振光，透射的成像光为S偏振光。或者，偏振透反件反射的成像光为S偏振光，透射的成像光为P偏振光。
在一个可能的实施方案中，所述透反件包括偏振透反件，所述偏振透反件反射的成像光为圆偏振光或椭圆偏振光，所述偏振透反件透射的成像光为线偏振光。
在一个可能的实施方案中，显示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透反件和所述曲面镜之间的光路上，用于改变从所述透反件反射的成像光的偏振方向和/或从所述曲面镜反射的成像光的偏振方向。
在一个可能的实施方案中，显示装置还包括扩散元件，所述扩散元件位于所述图像生成单元和所述透反件之间的光路上，用于对所述图像生成单元投射的成像光进行扩散。上述扩散元件可以起到匀光的作用，避免显示的图像出现局部过亮或过暗的情况。
在一个可能的实施方案中，显示装置还包括位于所述扩散元件的出光侧的第一偏振片，所述第一偏振片透射S偏振光或P偏振光。上述第一偏振片可以使得S偏振光或P偏振光透射到透反件进行透射或反射。
在一个可能的实施方案中，显示装置中的透反件包括半反半透膜和第二偏振片；所述半反半透膜反射部分成像光至所述曲面镜，透射另一部分所述成像光至所述第二偏振片；所述第二偏振片吸收入射的所述另一部分成像光以及透射所述曲面镜反射的成像光。
其中，第二偏振片可以称为偏振吸收膜。半反半透膜可以为半反半透波片。
在一个可能的实施方案中，透反件中的半反半透膜反射的成像光为P偏振光，所述第二偏振片吸收的成像光为P偏振光以及透射的成像光为S偏振光；或者，所述半反半透膜反射的成像光为S偏振光，所述第二偏振片吸收的成像光为S偏振光以及透射的成像光为P偏振光。
在一个可能的实施方案中，所述半反半透膜和所述第二偏振片相互贴合。
其中，上述半反半透膜和第二偏振片整体上可以实现上述偏振透反件的功能，即反射P偏振光，透射S偏振光，或者反射S偏振光，透射P偏振光。
在一个可能的实施方案中，透反件中的半反半透膜反射的成像光为圆偏振光或椭圆偏振光，所述半反半透膜透射的成像光为圆偏振光或椭圆偏振光。
在一个可能的实施方案中，所述透反件还包括位于所述半反半透膜和第二偏振片之间的第二偏振转换器件，所述第二偏振转换器件用于改变从所述半反半透件透射的圆偏振光或椭圆偏振光的偏振方向和/或从所述曲面镜反射的圆偏振光或椭圆偏振光的偏振方向。
在一个可能的实施方案中，所述半反半透膜、第二偏振转换器件和所述第二偏振片相互贴合。
在一个可能的实施方案中，显示装置还包括位于第一偏振片出光侧的第三偏振转换器件，所述第三偏振转换器件用于改变从所述第一偏振片透射的偏振光的偏振方向。
在一个可能的实施方案中，图像生成单元投射的成像光为线偏振光、圆偏振光或椭圆偏振光。
在一个可能的实施方案中，显示装置中的第一偏振转换器件还位于所述偏振透反件和所述图像生成单元之间的光路上，用于改变来自于所述图像生成单元的成像光的偏振方向。
此时，第一偏振器可以和偏振透反件平行设置或者和偏振透反件贴合在一起，整体结构 更加紧凑。
在其他的实施方案中，第一偏振转换器件可以位于偏振透反件和扩散元件、偏振片、第三偏振转换器件之间的光路上，即图像生成单元发出的成像光可以依次经过扩散元件、偏振片、第三偏振转换器件到达第一偏振转换器件，第一偏振转换器件透射成像光至所述偏振透反件。
在一个可能的实施方案中，所述曲面镜为多焦点曲面镜或自由曲面镜。
在一个可能的实施方案中，显示装置中的图像生成单元包括光源、成像模块和投影镜头。其中，光源用于输出光束至所述像模块；所述成像模块用于根据光束生成包含图像信息的成像光；所述投影镜头用于向所述透反件投射所述成像光。
在一个可能的实施方案中，上述透反件位于所述曲面镜的焦距内。进而，透反件反射的图像可以被曲面镜放大显示。
在以上的实施方案中，第一偏振转换器件、第二偏振转换器件、第三偏振转换器件可以为1/4波片、两个1/8波片或旋光器。
第二方面，本申请提供一种电子设备，该电子设备包括第一方面所述的显示装置。
第三方面，本申请还提供一种交通工具，其包括如第一方面所述的显示装置。
在一个可能的实施方案中，所述显示装置安装在所述交通工具的座椅上。
附图说明
图1a为本申请实施例公开的一种显示装置作为普通显示器的示意图；
图1b为本申请实施例公开的一种显示装置作为电视的示意图；
图1c为本申请实施例公开的一种显示装置作为车载显示的示意图；
图2为本申请实施例公开的一种显示装置的结构示意图；
图3为本申请实施例提供的显示装置中的图像生成单元的结构示意图；
图4为本申请实施例提供的一种显示装置的结构示意图；
图5为本申请实施例提供的一种显示装置的结构示意图；
图6为本申请实施例提供的一种显示装置的结构示意图；
图7为本申请实施例提供的一种显示装置的结构示意图；
图8为本申请实施例提供的一种显示装置的结构示意图；
图9为本申请实施例提供的一种显示装置的结构示意图；
图10为本申请实施例提供的一种显示装置的结构示意图；
图11为本申请实施例提供的一种显示装置的结构示意图；
图12是本申请实施例提供的一种显示装置的电路示意图。
具体实施方式
本申请提供一种显示装置、电子设备和交通工具。该显示装置可以作为普通显示器(例如图1a中的100a所示)进行办公使用，还可以作为电视(例如图1b中的100b所示)进行家庭娱乐(作为电视)，或者可以用于车载显示(例如图1c中的100c所示，显示装置安装在车辆的座椅上)。显示装置的物理尺寸、显示尺寸、分辨率可以根据使用场景进行调整。
在本申请中，该显示装置也可以称为显示系统或虚像显示装置。该显示装置中包括的单 元或模块可以称为组件或机构。
参考图2，图2为本申请实施例提供的一种显示装置的结构示意图。
如图2所示，该显示装置包括图像生成单元(Picture Generation Unit，PGU)110、透反件120和曲面镜130。其中，图像生成单元110用于生成包含图像信息的成像光，并向所述透反件120投射所述成像光；透反件(可以称为透反元件或透反组件)120用于将所述成像光反射至曲面镜130的凹面，曲面镜130用于反射接收到的成像光至透反件120，透反件120还用于透射所述曲面镜130反射的成像光。
在本实施例提供的显示装置中，曲面镜130的凹面作为反射面，其用于对透反件120反射的图像起到放大的作用(例如透反件120位于曲面镜130的焦距以内)，因而上述显示装置可以对图像生成单元110生成的图像进行拉远放大。用户的眼睛可以接收到曲面镜130反射的光线，从而观察到放大的虚像(实际光线的反向延长线)。相对于现有技术中的投影仪或大尺寸电视，本实施例提供的显示装置可以进行虚像显示，因而不需要特定的屏幕，也不需要占用较大的空间即可显示大尺寸的画面。
如图2所示，本实施例提供的显示装置可以包括扩散元件(可以为扩散屏或扩散板)140，所述扩散元件140位于所述图像生成单元110和所述透反件120之间的光路上，用于对所述图像生成单元110投射的成像光进行扩散，使得显示的图像亮度均匀。例如，通过扩散板漫反射或均匀透射图像生成单元110投射的成像光。
在本申请实施例提供的显示装置中，透反件120可以为镀膜反射镜或偏振透反件。镀膜反射镜可以对入射角小于第一阈值的光进行反射，对入射角大于第二阈值的光进行透射。通过调整曲面镜130和扩散元件140的位置，可以使得扩散元件透射的成像光被透反件120反射，曲面镜130反射的光线被透反件120透射到人眼。其中，第一阈值可以为40度，第二阈值可以为50度。
图3为本申请实施例提供的显示装置中的图像生成单元的结构示意图。
如图3所示，该图像生成单元包括光源101、成像模块102和投影镜头130，该图像生成单元可以用于前述的显示装置中，也可以独立使用。
本实施例中的光源101输出光束(白光)至成像模块102。成像模块102可以使用光束1来生成源图像。投影镜头103用于将成像光向外投射，其可以为短焦镜头。
本实施例中的成像模块102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。
本实施例中的光源101可以包括三色光源(蓝色光源1011，绿色光源1012，红色光源1013)，三色光源(可以称为三基色光源)发出的单色光混合后输出的白光输入到成像模块102，从而生成源图像。其中，光源101还可以包括第一波片1014和第二波片(半反半透波片)1015。上述蓝色光源1011，绿色光源1012，红色光源1013可以为发光二极管(Light-Emitting Diode，LED)光源，还可以为激光二极管光源。
其中，第一波片1014位于光源1011和1012输出的光线(光)的光路上，用于对光进行透射和反射。例如，第一波片1014对光源1011发射的蓝光进行透射，对光源1012发射的绿 光进行反射，反射光和透射光混合后输入第二波片1015。
第二波片1015也位于所述三色光源(1011，1012，1013)输出的三色光的光路上，用于对三色光进行透射和反射。例如，第二波片1015对光源1011发射的蓝光进行透射，对光源1012发射的绿光进行透射，对光源1013发射的红光进行反射和透射，反射的红光和两路透射光(蓝光和绿光)混合后输入成像模块102。
图4为本申请实施例提供的一种显示装置的结构示意图。
如图4所示，该显示装置包括图像生成单元210、透反件(本实施例为透P反S偏振片221)、曲面镜230、扩散元件240、第一偏振转换器件(本实施例为1/4波片250)和第一偏振片(本实施例为S偏振片241)。其中，图像生成单元210、曲面镜230、扩散元件240分别和上述实施例中的图像生成单元110、曲面镜130和扩散元件140的功能相同，在此不再赘述。
其中，透P反S偏振片221可以反射S偏振光，透射P偏振光，S偏振光和P偏振光的偏振方向相互垂直。
1/4波片250位于透P反S偏振片221和曲面镜230之间的光路上，其用于改变从透P反S偏振片221反射的成像光的偏振方向和从曲面镜230反射的成像光的偏振方向。1/4波片250位于曲面镜230的出光侧，且覆盖曲面镜230。
S偏振片241位于扩散元件240的出光侧，其透射S偏振光。
在本实施例提供的显示装置中，扩散元件240透射的成像光经过S偏振片241滤光后，成像光中的S偏振光(图示偏振方向垂直于纸面)被过滤出来，从而S偏振光被透射至透P反S偏振片221。透P反S偏振片221反射S偏振光至1/4波片250，1/4波片250对入射的S偏振光进行第一次相位延迟，S偏振光变为圆偏振光或椭圆偏振光。曲面镜230对第一次相位延迟的偏振光进行反射，即反射的偏振光再次入射1/4波片250，1/4波片250对曲面镜230反射的偏振光进行第二次相位延迟，圆偏振光或椭圆偏振光变为P偏振光。经过上述1/4波片250的两次相位延迟后，入射的S偏振光变为P偏振光(图示偏振方向为平行于纸面)射出，P偏振光可以从透P反S偏振片221透射到人眼，人眼即可观看到放大的虚像。
在本实施例提供的显示装置中，偏振片可以位于图像生成单元210内(例如位于图像生成单元210的投影镜头出光侧)，此时图像生成单元210直接投射出S偏振光到扩散元件240，扩散元件240出光侧的偏振片也就不需要了。
在本实施例，1/4波片250可以覆盖整个曲面镜230，从而被透P反S偏振片220反射的光和曲面镜230反射光都经过1/4波片，提高光的利用率。
图5为本申请实施例提供的一种显示装置的结构示意图。
图5提供的显示装置的显示原理和图4相同，区别在于透反件在本实施例为透S反P偏振片321、第一偏振片在本实施例为P偏振片341。其中，图像生成单元310、曲面镜330、扩散元件340分别和上述实施例中的图像生成单元210、曲面镜230和扩散元件240的功能相同，在此不再赘述。
其中，透S反P偏振片321可以反射P偏振光，透射S偏振光。P偏振片341位于扩散元件340的出光侧，其透射P偏振光。P偏振片也可以透P偏振片。
在本实施例提供的显示装置中，扩散元件240透射的成像光经过P偏振片341滤光后，成像光中的P偏振光(图示偏振方向平行于纸面)被过滤出来，从而P偏振光被透射至透S反P偏振片321。透S反P偏振片321反射P偏振光至1/4波片350，1/4波片350对入射的P偏振光进行第一次相位延迟，P偏振光变为圆偏振光或椭圆偏振光。曲面镜330对第一次相位延迟的偏振光进行反射，即反射的偏振光再次入射1/4波片350，1/4波片350对曲面镜330反射的偏振光进行第二次相位延迟，圆偏振光或椭圆偏振光变为S偏振光。经过上述1/4波片350的两次相位延迟后，入射的P偏振光变为S偏振光射出，S偏振光可以从透S反P偏振片321透射到人眼，人眼即可观看到放大的虚像。
图6为本申请实施例提供的一种显示装置的结构示意图。
图6所示的显示装置和图4所示的显示装置类似，区别在于图6实施例中的透反件包括半反半透膜421和第二偏振片(P偏振片422)，图4所示实施例中的透反件为透P反S偏振片221。图像生成单元410、曲面镜430、扩散元件440分别和上述实施例中的图像生成单元210、曲面镜230和扩散元件240的功能相同，在此不再赘述。
其中，P偏振片422可以透射P偏振光，S偏振光不能透射(被吸收)。半反半透膜421可以透射部分光，反射部分光。
在本实施例提供的显示装置中，扩散元件440透射的成像光经过第一偏振片(S偏振片441)滤光后，成像光中的S偏振光(偏振方向垂直于纸面)被过滤出来，从而S偏振光被透射至半反半透膜421。半反半透膜421反射部分S偏振光至1/4波片450，1/4波片450对入射的S偏振光进行第一次相位延迟，S偏振光变为圆偏振光或椭圆偏振光。半反半透膜421透射部分S偏振光至P偏振片422，这部分S偏振光无法透射该P偏振片422，因而被P偏振片422吸收。
曲面镜430对第一次相位延迟的偏振光进行反射，即反射的偏振光再次入射1/4波片450，1/4波片450对曲面镜430反射的偏振光进行第二次相位延迟，从而圆偏振光或椭圆偏振光变为P偏振光(偏振方向为平行于纸面)。经过上述1/4波片450的两次相位延迟后，入射的S偏振光变为P偏振光射出，P偏振光可以从半反半透膜221和P偏振片222透射到人眼，人眼即可观看到放大的虚像。
与图4相比，图6所示的显示装置通过半反半透膜421和P偏振片422实现了透P反S偏振片221的功能，且半反半透膜421和P偏振片422可以做成大面积，成本相对较低。
图7为本申请实施例提供的一种显示装置的结构示意图。
图7所示的显示装置和图5所示的显示装置类似，区别在于图7实施例中的透反件为半反半透膜521和第二偏振片(S偏振片522)，图5实施例的透反件为透S反P偏振片321。图像生成单元510、曲面镜530、扩散元件540分别和上述实施例中的图像生成单元310、曲面镜330和扩散元件340的功能相同，在此不再赘述。
其中，S偏振片522可以透射S偏振光，P偏振光不能透射(被吸收)，其也可以称为透S偏振片。半反半透膜521可以透射部分光，反射部分光。
在本实施例提供的显示装置中，扩散元件540透射的成像光经过第一偏振片(P偏振片541)滤光后，成像光中的P偏振光(偏振方向垂直于纸面)被过滤出来，从而P偏振光被透 射至半反半透膜521。半反半透膜521反射部分P偏振光至1/4波片550，1/4波片550对入射的P偏振光进行第一次相位延迟，P偏振光变为圆偏振光或椭圆偏振光。半反半透膜521透射部分P偏振光至S偏振片522，这部分S偏振光无法透射该S偏振片522，因而被S偏振片522吸收。
曲面镜530对第一次相位延迟的偏振光进行反射，即反射的偏振光再次入射1/4波片550，1/4波片550对曲面镜530反射的偏振光进行第二次相位延迟，从而圆偏振光或椭圆偏振光变为S偏振光(偏振方向为平行于纸面)。经过上述1/4波片550的两次相位延迟后，入射的P偏振光变为S偏振光射出，S偏振光可以从半反半透膜521和S偏振片522透射到人眼，人眼即可观看到放大的虚像。
与图5相比，图7所示的显示装置通过半反半透膜521和S偏振片522实现了透S反P偏振片321的功能，且半反半透膜521和S偏振片522可以做成大面积，成本相对较低。
图8为本申请实施例提供的一种显示装置的结构示意图。
如图8所示，该显示装置包括图像生成单元610、透反件、曲面镜630、扩散元件640、第一偏振转换器件(本实施例为1/4波片650)、第三偏振转换器件(本实施例为1/4波片642)和第一偏振片(本实施例为S偏振片641)。透反件在本实施例包括半反半透膜621、第二偏振转换器件(本实施例为1/4波片622)和第二偏振片(P偏振片623)。
其中，图像生成单元610、曲面镜630、扩散元件640分别和上述实施例中的图像生成单元110、曲面镜130和扩散元件140的功能相同，在此不再赘述。
其中，S偏振片641可以透射S偏振光，P偏振光不能透过(P偏振光被吸收)。P偏振片623可以透射P偏振光，S偏振光不能透过(S偏振光被吸收)。
1/4波片650位于半反半透膜621和曲面镜630之间的光路上，其用于改变从半反半透膜621反射的成像光的偏振方向和从曲面镜630反射的成像光的偏振方向。
1/4波片642位于S偏振片641和半反半透膜621之间的光路上，其用于改变S偏振片641透射的成像光的偏振方向。
1/4波片622位于半反半透膜621和P偏振片623之间的光路上，其用于改变从半反半透膜621透射的成像光的偏振方向。
在本实施例提供的显示装置中，扩散元件640透射的成像光经过S偏振片641滤光后，成像光中的S偏振光被过滤出来，S偏振光透射1/4波片642后，改变光的偏振方向，本实施例中S偏振光变为左旋的圆偏振光或椭圆偏振光(简称左旋偏振光)射出。
左旋偏振光被半反半透膜621反射和透射，透射的部分光线经过1/4波片650再次改变偏振方向。本实施例中左旋圆偏振光变为S偏振光射出，该S偏振光无法透过P偏振片623，即被P偏振片623吸收。左旋偏振光被半反半透膜621反射的另一部分光线(左旋偏振光)经过1/4波片650再次改变偏振方向，本实施例中左旋偏振光变为线偏振光(例如S偏振光)射出，线偏振光被曲面镜630反射后，再次透射1/4波片650。此时，线偏振光透射1/4波片650后变成右旋偏振光。左旋偏振光两次经过1/4波片650的效果相当于经过一次1/2波片。
右旋偏振光被半反半透膜621透射的部分光线经过1/4波片622再次改变偏振方向。本实施例中，右旋偏振光经过1/4波片622后变为P偏振光，P偏振光可以透射P偏振片623(偏振方向为平行于纸面)，透射的P偏振光入射到人眼，人眼即可观看到放大的虚像。
图9为本申请实施例提供的一种显示装置的结构示意图。
如图9所示，该显示装置包括图像生成单元710、透反件、曲面镜730、扩散元件740、第一偏振转换器件(本实施例为1/4波片750)、第三偏振转换器件(本实施例为1/4波片770)和第一偏振片(本实施例为P偏振片741)。透反件在本实施例包括半反半透膜721、第二偏振转换器件(本实施例为1/4波片722)和第二偏振片(S偏振片723)。
其中，图像生成单元710、曲面镜730、扩散元件740分别和上述实施例中的图像生成单元110、曲面镜130和扩散元件140的功能相同，在此不再赘述。
其中，S偏振片723可以透射S偏振光，P偏振光不能透过(P偏振光被吸收)。P偏振片741可以透射P偏振光，S偏振光不能透过(S偏振光被吸收)。
1/4波片750位于半反半透膜721和曲面镜730之间的光路上，其用于改变从半反半透膜721反射的成像光的偏振方向和从曲面镜730反射的成像光的偏振方向。
1/4波片742位于P偏振片741和半反半透膜721之间的光路上，其用于改变S偏振片741透射的成像光的偏振方向。
1/4波片722位于半反半透膜721和S偏振片723之间的光路上，其用于改变从半反半透膜721透射的成像光的偏振方向。
在本实施例提供的显示装置中，扩散元件740透射的成像光经过P偏振片741滤光后，成像光中的P偏振光被过滤出来，P偏振光透射1/4波片742后，改变光的偏振方向，本实施例中S偏振光变为右旋的圆偏振光或椭圆偏振光(简称右旋偏振光)射出。
左旋偏振光被半反半透膜721反射和透射，透射的部分光线经过1/4波片750再次改变偏振方向。本实施例中左旋圆偏振光变为S偏振光射出，该S偏振光无法透过P偏振片723，即被P偏振片723吸收。左旋偏振光被半反半透膜721反射的另一部分光线(左旋偏振光)经过1/4波片750再次改变偏振方向，本实施例中左旋偏振光变为线偏振光(例如P偏振光)射出，线偏振光被曲面镜730反射后，再次透射1/4波片750。此时，线偏振光透射1/4波片750后变成右旋偏振光。左旋偏振光两次经过1/4波片750的效果相当于经过一次1/2波片。
右旋偏振光被半反半透膜721透射的部分光线经过1/4波片722再次改变偏振方向。本实施例中，右旋偏振光经过1/4波片722后变为P偏振光，P偏振光可以透射P偏振片723(偏振方向为平行于纸面)，透射的P偏振光入射到人眼，人眼即可观看到放大的虚像。
图10为本申请实施例提供的一种显示装置的结构示意图。
如图10所示，该显示装置包括图像生成单元810、透反件、曲面镜830、扩散元件840、第一偏振转换器件(本实施例为1/4波片850)、第三偏振转换器件(本实施例为1/4波片842)和第一偏振片(本实施例为S偏振片841)。透反件在本实施例包括透S反P偏振膜821。
其中，图像生成单元810、曲面镜830、扩散元件840分别和上述实施例中的图像生成单元610、曲面镜630和扩散元件640的功能相同，在此不再赘述。
其中，S偏振片841可以透射S偏振光，P偏振光不能透过(P偏振光被吸收)。
透S反P偏振膜821可以透射S偏振光，反射P偏振光。
1/4波片850位于透S反P偏振膜821和曲面镜830之间的光路上，其用于改变从透S反P偏振膜821反射的成像光的偏振方向和从曲面镜830反射的成像光的偏振方向。另外， 1/4波片850还位于1/4波片842和透S反P偏振膜821之间的光路上，其用于改变从1/4波片842入射的成像光的偏振方向。
1/4波片842位于S偏振片841和1/4波片850之间的光路上，其用于改变S偏振片841透射的成像光的偏振方向。
在本实施例提供的显示装置中，扩散元件840透射的成像光经过S偏振片841滤光后，成像光中的S偏振光被过滤出来，S偏振光透射1/4波片842后，改变光的偏振方向，本实施例中S偏振光变为左旋的圆偏振光或椭圆偏振光(简称左旋偏振光)射出。
左旋偏振光经过1/4波片850后，改变偏振方向。本实施例中，左旋偏振光变为P偏振光射出，P偏振光被透S反P偏振膜821反射后再次经过1/4波片850，透射右旋偏振光。
右旋偏振光被曲面镜830反射后，再次透射1/4波片850。此时，右旋偏振光透射1/4波片850后变成S偏振光(偏振方向为垂直于纸面)。偏振光两次经过1/4波片850的效果可以相当于经过一次1/2波片。透射的S偏振光入射到人眼，人眼即可观看到放大的虚像。
与图4-9所示的显示装置相比，本实施例提供的显示装置中1/4波片850没有直接覆盖曲面镜830，而是和透S反P偏振膜821平行设置，比较容易安装，整体成本较低。
另外，上述透S反P偏振膜821可以使用图5所示的实施例中半反半透膜521和S偏振片522来实现。具体实现过程参考上述实施例，在此不再赘述。
图11为本申请实施例提供的一种显示装置的结构示意图。
如图11所示，该显示装置包括图像生成单元910、透反件、曲面镜930、扩散元件940、第一偏振转换器件(本实施例为1/4波片950)、第三偏振转换器件(本实施例为1/4波片942)和第一偏振片(本实施例为P偏振片941)。透反件在本实施例包括透P反S偏振膜921。
其中，图像生成单元910、曲面镜930、扩散元件940分别和上述实施例中的图像生成单元810、曲面镜830和扩散元件840的功能相同，在此不再赘述。
其中，P偏振片941可以透射P偏振光，S偏振光不能透过(S偏振光被吸收)。
透P反S偏振膜921可以透射P偏振光，反射S偏振光。透P反S偏振膜921可以和1/4波片950平行设置。
1/4波片950位于透P反S偏振膜921和曲面镜930之间的光路上，其用于改变从透P反S偏振膜921反射的成像光的偏振方向和从曲面镜930反射的成像光的偏振方向。另外，1/4波片950还位于1/4波片942和透P反S偏振膜921之间的光路上，其用于改变从1/4波片942入射的成像光的偏振方向。
1/4波片942位于P偏振片941和1/4波片950之间的光路上，其用于改变P偏振片941透射的成像光的偏振方向。
在本实施例提供的显示装置中，扩散元件940透射的成像光经过P偏振片941滤光后，成像光中的P偏振光被过滤出来，P偏振光透射1/4波片942后，改变光的偏振方向，本实施例中P偏振光变为右旋的圆偏振光或椭圆偏振光(简称右旋偏振光)射出。
右旋偏振光经过1/4波片950后，改变偏振方向。本实施例中，右旋偏振光变为S偏振光射出，S偏振光被透P反S偏振膜921反射后再次经过1/4波片950，透射为左旋偏振光。
左旋偏振光被曲面镜930反射后，再次透射1/4波片950。此时，左旋偏振光透射1/4波片950后变成P偏振光(偏振方向为平行于纸面)。偏振光两次经过1/4波片950的效果可以 相当于经过一次1/2波片。透射的P偏振光入射到人眼，人眼即可观看到放大的虚像。
另外，上述透P反S偏振膜921可以通过图6所示的显示装置中半反半透膜421和P偏振片422来实现。具体实现过程参考上述实施例，在此不再赘述。
在本申请提供的以上实施例中，偏振片可以称为偏光片、起偏器、偏振器、偏振膜或偏振器件。例如，P偏振片可以称为P偏振膜，透S反P偏振片可以称为透S反P偏振器。
参考图12，图12是本申请实施例提供的显示装置的电路示意图。
如图12所示，显示装置中的电路主要包括包含处理器1001，存储器1002，控制器局域网(Controller Area Network，CAN)收发器1003，音频模块1004，视频模块1005，电源模块1006，无线通信模块1007，I/O接口1008、视频接口1009、触控单元1010、显示电路1028和成像器件1029等。其中，处理器1001与其周边的元件，例如存储器1002，CAN收发器1003，音频模块1004，视频模块1005，电源模块1006，无线通信模块1007，I/O接口1008、视频接口1009、触控单元1010、显示电路1028可以通过总线连接。处理器1001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，处理器1001包括一个或多个处理单元，例如：处理器1001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。
处理器1001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，处理器1001中的存储器为高速缓冲存储器。该存储器可以保存处理器1001刚用过或循环使用的指令或数据。如果处理器1001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，减少了处理器1001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处理器1001的输入输出(Input/Output，I/O)接口1008。接口1008可以包括但不限于集成电路(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)接口等。上述I/O接口1008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)。
存储器1002可以包括内部存储器，还可以包括外部存储器(例如Micro SD卡)，存储器1002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。存储器1002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，存储器1002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。处理器1001通过运行存储在存储器1002的指令，和/或存储在设置于处理器1001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。
进一步的，上述显示装置还包括CAN收发器1003，CAN收发器1003可以连接到汽车的CAN总线(CAN BUS)。通过CAN总线，显示装置可以与车载娱乐系统(音乐、电台、视频模块)、车辆状态系统等进行通信。例如，用户可以通过操作显示装置来开启车载音乐播放功能。车辆状态系统可以将车辆状态信息(车门、安全带等)发送给显示装置进行显示。
显示装置可以通过音频模块1004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1004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1004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1004可以设置于处理器1001中，或将音频模块1004的部分功能模块设置于处理器1001中。
视频接口1009可以接收输入的音视频，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(Displayport，DP)，低压差分信号(Low Voltage Differential Signaling，LVDS)接口等，视频接口1009还可以向外输出视频。例如，显示装置通过视频接口接收导航系统发送的视频数据。
视频模块1005可以对视频接口1009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，处理器1001也可以对视频接口1009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。
显示电路1028和成像器件1029用于显示对应的图像。在本实施例中，视频接口1009接收输入的视频数据(或称为视频源)，视频模块1005进行解码和/或数字化处理后输出图像信号至显示电路1028，显示电路1028根据输入的图像信号驱动成像器件1029将光源101发出的光束进行成像，从而生成可视图像。例如，成像器件1029生成源图像，发出成像光。其中，显示电路1028以及成像器件1029属于成像模块102中的电子元件，显示电路1028可以称为驱动电路。
电源模块1006用于根据输入的电力(例如直流电)为处理器1001和光源101提供电源，电源模块1006中可以包括可充电电池，可充电电池可以为处理器1001和光源101提供电源。光源101发出的光可以传输到成像器件1029进行成像，从而形成图像光信号(成像光)。
此外，上述电源模块1006可以连接到汽车的供电模块(例如动力电池)，由汽车的供电模块为显示装置的电源模块1006供电。
无线通信模块1007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1007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1007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处理器1001。无线通信模块1007还可以从处理器1001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1005进行解码的视频数据除了通过视频接口1009输入之外，还可以通过无线通信模块1007以无线的方式接收或从存储器1002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存储器1002中存储的音视频数据。
触控单元1010可以根据用户对触控界面的触控操作生成控制信号(例如亮度/对比度调整信号)，然后通过处理器201向显示电路1028发送该控制信号，显示电路1028根据该控制信号调整成像器件1029的成像，从而改变显示的源图像。其中，触控界面可以包括控制按键(音量、亮度、对比度调整按键等)。
本申请实施例中的曲面镜可以是多焦点的自由曲面镜。通过设计多焦点的自由曲面反射镜来实现多人观看。
本申请实施例中的交通工具可以是汽车、飞机、轮船、火箭等已知的交通工具，还可以是未来新出现的交通工具。汽车可以是电动汽车、燃油车或混合动力车，例如，纯电动汽车、增程式电动汽车、混合动力电动汽车、燃料电池汽车、新能源汽车等，本申请对此不做具体限定。此外，本申请实施例中的电子设备包括安装有显示装置的设备，其可以包括上述交通工具，还可用为医疗设备、办公娱乐设备或工业控制设备，本实施例对此不做限定。
本申请的术语“第一、第二、第三和第四”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序，应该理解这样使用的数据在适当情况下可以互换，以便这里描述的实施例能够以本申请未描述的顺序实施。为了更加明显地体现不同实施例中的组件的关系，本申请采用相同的附图编号来表示不同实施例中功能相同或相似的组件。
还需要说明的是，除非特殊说明，一个实施例中针对一些技术特征的具体描述也可以应用于解释其他实施例提及对应的技术特征。
其中，本申请中的各个实施例之间相同相似的部分互相参见即可。以上所述仅为本申请的具体实施方式，本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖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：
    图像生成单元，用于生成包含图像信息的成像光，并向所述透反件投射所述成像光；
    透反件，用于将所述成像光反射至曲面镜；
    所述曲面镜，用于反射接收到的成像光至所述透反件；
    所述透反件还用于透射所述曲面镜反射的成像光。
  2. 如权利要求1所述的显示装置，其特征在于，
    所述透反件反射的成像光的偏振方向和透射的成像光的偏振方向不同。
  3. 如权利要求1或2所述的显示装置，其特征在于，
    所述透反件包括偏振透反件，所述偏振透反件反射的成像光的偏振方向和透射的成像光的偏振方向相互垂直。
  4. 如权利要求1或2所述的显示装置，其特征在于，
    所述透反件包括偏振透反件，所述偏振透反件反射的成像光为圆偏振光或椭圆偏振光，所述偏振透反件透射的成像光为线偏振光。
  5. 如权利要求1或2所述的显示装置，其特征在于，
    所述透反件反射的成像光为P偏振光，透射的成像光为S偏振光；或者，
    所述透反件反射的成像光为S偏振光，透射的成像光为P偏振光。
  6. 如权利要求1所述的显示装置，其特征在于，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透反件和所述曲面镜之间的光路上，用于改变从所述透反件反射的成像光的偏振方向和/或从所述曲面镜反射的成像光的偏振方向。
  7. 如权利要求5所述的显示装置，其特征在于，所述第一偏振转换器件为1/4波长片。
  8. 如权利要求1-7任一项所述的显示装置，其特征在于，还包括：
    扩散元件，所述扩散元件位于所述图像生成单元和所述透反件之间的光路上，用于对所述图像生成单元投射的成像光进行扩散。
  9. 如权利要求8所述的显示装置，其特征在于，还包括位于所述扩散元件的出光侧的第一偏振片。
  10. 如权利要求1所述的显示装置，其特征在于，所述透反件包括半反半透膜和第二偏振片；
    所述半反半透膜用于反射部分成像光至所述曲面镜，透射另一部分所述成像光至所述第二偏振片；
    所述第二偏振片用于吸收入射的所述另一部分成像光以及透射所述曲面镜反射的成像光。
  11. 如权利要求10所述的显示装置，其特征在于，
    所述半反半透膜反射的成像光为P偏振光，所述第二偏振片吸收的成像光为P偏振光以及透射的成像光为S偏振光；
    或者，所述半反半透膜反射的成像光为S偏振光，所述第二偏振片吸收的成像光为S偏振光以及透射的成像光为P偏振光。
  12. 如权利要求10或11所述的显示装置，其特征在于，所述半反半透膜和所述第二偏 振片相互贴合。
  13. 如权利要求10所述的显示装置，其特征在于，所述半反半透膜反射的成像光为圆偏振光或椭圆偏振光，所述半反半透膜透射的成像光为圆偏振光或椭圆偏振光。
  14. 如权利要求13所述的显示装置，其特征在于，所述透反件还包括位于所述半反半透膜和第二偏振片之间的第二偏振转换器件，所述第二偏振转换器件用于改变从所述半反半透件透射的圆偏振光或椭圆偏振光的偏振方向和/或从所述曲面镜反射的圆偏振光或椭圆偏振光的偏振方向。
  15. 如权利要求14所述的显示装置，其特征在于，所述第二偏振转换器件为1/4波长片。
  16. 如权利要求9所述的显示装置，其特征在于，还包括位于所述第一偏振片出光侧的第三偏振转换器件，所述第三偏振转换器件用于改变从所述第一偏振片透射的偏振光的偏振方向。
  17. 如权利要求16所述的显示装置，其特征在于，所述第三偏振转换器件为1/4波长片。
  18. 如权利要求1所述的显示装置，其特征在于，所述图像生成单元投射的成像光为圆偏振光或椭圆偏振光。
  19. 如权利要求6所述的显示装置，其特征在于，
    所述第一偏振转换器件还位于所述偏振透反件和所述图像生成单元之间的光路上，用于改变来自于所述图像生成单元的成像光的偏振方向。
  20. 如权利要求19所述的显示装置，其特征在于，所述偏振透反件与所述第一偏振转换器件平行设置。
  21. 如权利要求1所述的显示装置，其特征在于，所述透反件为镀膜反射镜。
  22. 如权利要求1-21任一项所述的显示装置，其特征在于，所述曲面镜为多焦点曲面镜或自由曲面镜。
  23. 如权利要求1-21任一项所述的显示装置，其特征在于，所述图像生成单元包括光源、成像模块和投影镜头，
    所述光源，用于输出光束至所述像模块；
    所述成像模块，用于根据光束生成包含图像信息的成像光；
    所述投影镜头，用于向所述透反件投射所述成像光。
  24. 一种电子设备，其特征在于，包括如权利要求1-23任一项所述的显示装置。
  25. 一种交通工具，其特征在于，包括如权利要求1-23任一项所述的显示装置。
  26. 如权利要求25所述的交通工具，其特征在于，所述显示装置安装在所述交通工具的座椅上。
PCT/CN2022/116030 2021-10-14 2022-08-31 显示装置、电子设备以及交通工具 WO2023061078A1 (zh)

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