WO2022037703A1 - Appareil d'affichage d'image multicouche, affichage tête haute et dispositif de trafic - Google Patents

Appareil d'affichage d'image multicouche, affichage tête haute et dispositif de trafic Download PDF

Info

Publication number
WO2022037703A1
WO2022037703A1 PCT/CN2021/114139 CN2021114139W WO2022037703A1 WO 2022037703 A1 WO2022037703 A1 WO 2022037703A1 CN 2021114139 W CN2021114139 W CN 2021114139W WO 2022037703 A1 WO2022037703 A1 WO 2022037703A1
Authority
WO
WIPO (PCT)
Prior art keywords
display area
display
sub
image
reflection
Prior art date
Application number
PCT/CN2021/114139
Other languages
English (en)
Chinese (zh)
Inventor
徐俊峰
吴慧军
方涛
Original Assignee
未来（北京）黑科技有限公司
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 未来（北京）黑科技有限公司 filed Critical 未来（北京）黑科技有限公司
Publication of WO2022037703A1 publication Critical patent/WO2022037703A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • 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

Definitions

  • At least one embodiment of the present disclosure relates to a multilayer image display apparatus, a head-up display, and a transportation device.
  • the Head Up Display (HUD) device can use the reflective optical design to project the image light (including vehicle information such as vehicle speed) from the image source onto the imaging window (such as windshield, imaging plate, etc.) Allowing users (such as drivers and/or passengers) to see information directly without looking down at the instrument panel while driving can improve driving safety and bring a better driving experience.
  • vehicle information such as vehicle speed
  • imaging window such as windshield, imaging plate, etc.
  • At least one embodiment of the present disclosure provides a multi-layer image display device, a head-up display, and a transportation device.
  • a multi-layer image display device provided by an embodiment of the present disclosure includes: an image source, including at least two display areas, the at least two display areas including a first display area and a second display area; a first display area a reflective element configured to reflect image light emitted by the at least two display areas; a second reflective element configured to reflect the image propagated toward the second reflective element after being reflected by the first reflective element light.
  • the first reflection element includes at least a first sub-reflection element and a second sub-reflection element, and the image light emitted from the first display area propagates to the second reflection after being reflected by the first sub-reflection element element, the image light emitted from the second display area propagates to the second reflection element after being reflected by the second sub-reflection element.
  • an embodiment of the present disclosure provides a multi-layer image display device, comprising: an image source; a first reflecting element configured to reflect image light emitted by the image source; and a second reflecting element configured to reflect The image light rays propagated to the second reflection element after being reflected by the first reflection element, wherein the image light rays are reflected by the second reflection element to form a plurality of sub-virtual images, and the plurality of sub-virtual images include the first A sub-virtual image, a second sub-virtual image and a third sub-virtual image, among the first sub-virtual image, the second sub-virtual image and the third sub-virtual image, the sub-virtual image with the center imaging distance is inclined with respect to the horizontal direction and the inclination degree is smaller than that of the other two sub-virtual images The angle relative to the horizontal.
  • the first display area and the second display area of the at least two display areas are emitted from the first display area and the second display area and propagate to the
  • the optical distances of the image rays of the second reflection element are the same or different, and the image rays emitted from the first display area and the second display area of the at least two display areas and propagated to the second reflection element form different virtual images .
  • the optical light of the image light emitted from the first display area and propagated to the second reflective element The distance is less than the optical distance of the image light rays exiting the second display area and propagating to the second reflective element.
  • the second display area is located on a side of the first display area away from the second reflective element
  • the second sub-reflection element is located on a side of the first sub-reflection element away from the second reflection element
  • the distance between the center of the second sub-reflection element and the second display area is greater than the distance between the center of the second sub-reflection element and the second display area The distance between the center of the first sub-reflection element and the first display area.
  • the display surface of the first display area and the display surface of the second display area are parallel, and the The included angle between the reflection surface of the first sub-reflection element and the reflection surface of the second sub-reflection element is not greater than 20°.
  • the image source includes a first sub-image source
  • the first sub-image source includes the first display area and the second display area
  • a light-shielding structure is arranged between the first display area and the second display area.
  • the area of the first display area is smaller than the area of the second display area.
  • the first sub-reflection element and the second sub-reflection element are integrally formed.
  • the at least two display areas further include a third display area
  • the first reflective element further includes a third display area.
  • a sub-reflection element, the image light emitted by the third display area is transmitted to the second reflection element after being reflected by the third sub-reflection element.
  • the included angle between the display surface of the first display area and the display surface of the third display area 5° ⁇ 90°.
  • the optical light of the image light emitted from the first display area and propagated to the second reflective element a distance less than the optical distance of the image light rays exiting the third display area and propagating to the second reflective element, and the image exiting the third display area and propagating to the second reflective element
  • the optical distance of the light rays is less than the optical distance of the image light rays that exit from the second display area and travel to the second reflection element; or, exit from the third display area and travel to the second reflection element
  • the optical distance of the image light rays is smaller than the optical distance of the image light rays exiting from the first display area and propagating to the second reflection element.
  • the third display area is located on a side of the second display area away from the second reflective element
  • the third sub-reflection element is located on a side of the second sub-reflection element away from the second reflection element, and the distance between the center of the third sub-reflection element and the third display area is smaller than the distance between the center of the third sub-reflection element and the third display area.
  • the distance between the center of the first sub-reflection element and the first display area; or, the third display area is located on the side of the first display area close to the second reflection element, and the third sub-reflection element on the side of the first sub-reflection element close to the second reflection element.
  • the first sub-reflection element, the second sub-reflection element, and the third sub-reflection element are all is a plane reflection mirror; or, in the case that the third sub-reflection element is located on the side of the first sub-reflection element close to the second reflection element, the first sub-reflection element and the second sub-reflection element
  • the reflective elements are all flat mirrors
  • the third sub-reflection element is a transflective element, and is configured to transmit at least one of the first sub-reflection element and the second sub-reflection element and reflect toward the second sub-reflection element the image rays of the reflective element.
  • the transflective element includes a polarized transflective element, and the third display area emits a light having a first polarization Polarized light, the light emitted by at least one of the first display area and the second display area has at least a second polarization, the first polarization and the second polarization are different, and the transflective element is is configured to reflect the polarized light with the first polarization and transmit the light with the second polarization; or, the transflective element is a wavelength selective transflective element, and the light emitted from the third display area
  • the waveband where the image light is located is the first waveband group
  • the waveband where the image light beam emitted by at least one of the first display area and the second display area is located is the second waveband group
  • the transflective element is configured to reflect the The image light of the first waveband group is transmitted and the image light of the second waveband group is
  • the image source further includes a second sub-image source, and the second sub-image source includes the third sub-image source display area; or, the first sub-image source includes the third display area.
  • At least one embodiment of the present disclosure provides a head-up display including a reflective imaging part and a display device, wherein the reflective imaging part is configured to reflect image light reflected from the second reflective element to the reflective imaging part to a an observation area, and transmits ambient light; wherein, the display device is any of the above-mentioned display devices.
  • the distance between the first virtual image formed by the image light emitted by the first display area and reflected by the reflection imaging part and the observation area is 2-4 meters
  • the distance between the second virtual image formed by the image light emitted by the second display area and reflected by the reflection imaging part and the observation area is 20-50 meters.
  • the at least two display areas further include the third display area
  • the display surface of the first display area and the display surface of the third display area The included angle between them is 5° to 90°.
  • the image light emitted by the third display area is reflected by the reflection imaging part
  • the distance between the formed third virtual image and the observation area is 7-14 meters
  • the first virtual image and the second virtual image are parallel or have a non-zero included angle
  • the third virtual image and the first virtual image are parallel.
  • the included angle between a virtual image is 5° to 90°.
  • the first virtual image and the second virtual image are in a vertical direction, and the third virtual image is inclined in a direction away from the observation area.
  • a virtual image formed by the image light emitted by the second display area being reflected by the second reflection element is located at the focal plane of the reflection imaging part.
  • At least one of the first virtual image, the second virtual image, and the third virtual image is inclined in a direction away from the observation area.
  • a virtual image formed by the image light emitted by the first display area and reflected by the reflection imaging part is a first virtual image
  • the image emitted by the second display area The virtual image formed by the light reflected by the reflection imaging part is the second virtual image
  • the virtual image formed by the image light emitted by the third display area and reflected by the reflection imaging part is the third virtual image
  • the first virtual image , the second virtual image and the third virtual image, the inclination degree of the virtual image centered from the observation area relative to the horizontal direction is smaller than the included angle of the remaining two virtual images relative to the horizontal direction.
  • the head-up display further includes a package housing having an opening, wherein the image source, the first reflection element and the second reflection element are all located in the package housing,
  • the reflection imaging part is located outside the package casing, and the image light emitted from the opening of the packaging case is reflected to the observation area by the reflection imaging part.
  • a transparent dustproof film is provided at the opening position to encapsulate the opening, and a light shield is provided outside the transparent dustproof film, and the light shield does not block the passage from the opening.
  • the light path of the image light beams that are emitted and propagated to the reflection imaging part, and the light shielding cover is configured to block part of the ambient light.
  • At least one embodiment of the present disclosure provides a transportation device, including any of the above-mentioned display devices, or any of the above-mentioned head-up displays.
  • the reflective imaging part is a windshield or an imaging window of the traffic equipment.
  • the first sub virtual image in the display device provided by the second aspect of the present disclosure may be the first virtual image in the head-up display provided by any embodiment of the present disclosure, and/or the display provided by the second aspect of the present disclosure
  • the second sub-virtual image in the device may be the second virtual image in the head-up display provided by any embodiment of the present disclosure
  • the third sub-virtual image in the display device provided by the second aspect of the present disclosure may be any implementation of the present disclosure
  • the third virtual image in the head-up display provided by the example
  • FIG. 1 is a schematic partial structural diagram of a display device provided according to an example of an embodiment of the present disclosure
  • FIG. 2 is a schematic partial structural diagram of a display device provided according to another example of an embodiment of the present disclosure.
  • FIG. 3 is a schematic plan view of the sub-image source shown in FIG. 1;
  • FIG. 4 is a schematic partial structural diagram of a display device provided according to another example of an embodiment of the present disclosure.
  • FIG. 5 is a schematic partial structural diagram of a display device provided according to another example of an embodiment of the present disclosure.
  • FIG. 6A is a schematic structural diagram of a head-up display provided according to an example of an embodiment of the present disclosure.
  • FIG. 6B is a schematic structural diagram of a head-up display provided according to an example of another embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a head-up display provided according to an example of another embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a package housing in the head-up display shown in FIG. 7;
  • FIG. 9 is a schematic structural diagram of a head-up display provided according to another example of another embodiment of the present disclosure.
  • FIGS. 10A to 10D are schematic structural diagrams of a reflective light guide element provided according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a combination of a light beam converging element and a reflective light guiding element provided according to an embodiment of the present disclosure
  • FIG. 12 is a schematic diagram of an optical path of a combination of a reflective light guide element, a beam condensing element, and a beam diffusing element provided according to an embodiment of the present disclosure
  • FIG. 13 is a schematic partial structural diagram of a head-up display provided according to another example of another embodiment of the present disclosure.
  • FIG. 14 is a schematic partial structural diagram of a head-up display provided according to another example of another embodiment of the present disclosure.
  • FIG. 15 is a partial structural schematic diagram of a head-up display provided according to another example of another embodiment of the present disclosure.
  • 16 is an exemplary block diagram of a transportation device provided according to another embodiment of the present disclosure.
  • the distance between the image displayed by the head-up display and the human eye is fixed when the head-up display is in use, and the real scene around the vehicle, such as buildings, pedestrians or other vehicles, is constantly moving relative to the vehicle during the driving process of the vehicle using the head-up display. , the distance between the real scene around the vehicle and the driver is constantly changing.
  • the inventors of the present disclosure found that the distance between the image displayed by the head-up display and the human eye is generally fixed when in use, for example, the distance between the image and the human eye is about 5-20 meters.
  • the user such as a driver
  • the user needs to switch the line of sight between the image with a fixed distance displayed by the head-up display and the real scene with different distances, which is prone to conflict in the adjustment of visual vergence, causing the driver to experience problems such as blurring and dizziness. Waiting for visual fatigue, which reduces the experience of using the head-up display.
  • Embodiments of the present disclosure provide a multi-layer image display device, a head-up display, and a transportation device.
  • the display device includes an image source, a first reflection element and a second reflection element.
  • the image source includes at least two display areas, the at least two display areas include a first display area and a second display area; the first reflection element is configured to reflect the image light emitted by the at least two display areas; the second reflection element is is configured to reflect image light rays propagating toward the second reflective element after being reflected by the first reflective element.
  • the first reflection element includes at least a first sub-reflection element and a second sub-reflection element.
  • images at different distances can be imaged at different distances, which facilitates the matching and fusion of images at different distances with real scenes at different distances, so that when the display device is applied to a head-up display, the user does not need to Switching back and forth between images at a fixed distance and real scenes at different distances avoids the conflict of visual vergence adjustment and improves the use experience of the display device.
  • FIG. 1 is a schematic partial structural diagram of a display device provided according to an example of an embodiment of the present disclosure.
  • the display device includes an image source 100 , a first reflection element 200 and a second reflection element 300 .
  • the image source 100 includes at least two display areas 110 .
  • the first reflection element 200 is configured to reflect the image light emitted from the at least two display areas 110 .
  • the first reflective element 200 is located on the display side of the image source 100 . But not limited to this, the first reflective element 200 may also be located on the non-display side of the image source, and the light emitted by the image source is radiated toward the first reflective element through other reflective structures.
  • the second reflective element 300 is configured to reflect the image light that propagates toward the second reflective element 300 after being reflected by the first reflective element 200 .
  • the image light emitted by the image source 100 is reflected by the first reflection element 200 toward the second reflection element 300 .
  • the second reflection element 300 is located on the side of the first reflection element 200 facing the image source 100 .
  • no optical element may be arranged between the first reflective element and the second reflective element, and the light reflected by the first reflective element may directly enter the second reflective element, but not limited to this, the first reflective element and the second reflective element
  • Other optical elements, such as a reflective structure or a lens, may also be disposed between, and the light processed by the above-mentioned other optical elements is incident on the second reflective element.
  • the display device provided by the embodiments of the present disclosure can be imaged at different positions, which improves the user experience.
  • the optical distances of image light rays emitted from the first display area 111 and the second display area 112 of the at least two display areas 110 and propagated to the second reflection element 300 are the same or different.
  • the optical distances of image light rays emitted from the first display area 111 and the second display area 112 of the at least two display areas 110 and propagated to the second reflective element 300 are the same to realize the same-layer display.
  • the optical distances of the image rays emitted from the at least two display areas 110 to the second reflection element 300 are different.
  • the image light emitted from the at least two display areas 110 is reflected by the first reflective element 200 to the second reflective element 300.
  • the optical distances of the image light from the at least two display areas 110 are different so that they are reflected by the second reflective light path.
  • At least two virtual images reflected by the reflective element 300 have different distances from the user.
  • the above-mentioned "optical distance” refers to the product of the geometric distance of the image light emitted from the display area to the second reflective element and the refractive index of the propagation medium.
  • the above-mentioned "display side of the image source” refers to the side from which the image source emits light.
  • the optical distances of the image rays emitted from at least two display areas to the second reflective element are different, and the images can be imaged at different distances, which is beneficial to match the images at different distances with the real scenes at different distances. Fusion, so that when the display device is applied to the head-up display, the user does not need to switch back and forth between the image at a fixed distance and the real scene at different distances, which avoids the conflict of visual vergence adjustment and improves the use experience of the display device.
  • each of the at least two display areas 110 may display different images to meet the user's requirement of viewing different images.
  • the embodiments of the present disclosure are not limited thereto, for example, a part of the at least two display areas may also display the same image.
  • the image light rays emitted from the first display area 111 and the second display area 112 of the at least two display areas 110 and propagated to the second reflection element 300 form different virtual images.
  • the above-mentioned different virtual images may refer to different virtual images, for example, at least one of the virtual image position, the virtual image size, the virtual image inclination degree, and the virtual image content is different.
  • the first reflection element 200 may include at least two sub-reflection elements, and the at least two display areas 110 may correspond to the at least two sub-reflection elements one-to-one.
  • the one-to-one correspondence is explained as follows: when there is a one-to-one correspondence between the sub-reflection elements and the display area, different sub-reflection elements can reflect the image light displayed in different display areas to the second reflection element.
  • the embodiment of the present disclosure is not limited thereto.
  • the image rays emitted from the at least two display areas to the second reflective element may also both be incident on the same first reflector. a reflective element.
  • the at least two display areas 110 include a first display area 111 and a second display area 112
  • the first reflective element 200 includes a first sub-reflection element 210 and a second sub-reflection element 220
  • the first sub-reflection element 220 210 is configured to reflect the image light emitted by the first display area 111 to the second reflection element 300
  • the second sub-reflection element 220 is configured to reflect the image light emitted by the second display area 112 to the second reflection element 300 .
  • FIG. 1 schematically shows that there are no other optical elements between the display area and the first reflective element.
  • the image light emitted by the first display area can be directly incident on the first sub-reflection element, and the image emitted by the second display area can be directly incident.
  • Light rays can be directly incident on the second sub-reflection element.
  • the present disclosure is not limited thereto, and other optical elements, such as lenses, etc., may also be disposed between the display area and the first reflective element.
  • the image light emitted by the first display area may be processed by other optical elements and then incident on the first sub-reflection element.
  • the image light emitted from the second display area can be processed by other optical elements and then incident on the second sub-reflection element.
  • the image light emitted by one of the first display area and the second display area is processed by other optical elements and then incident on the first reflective element, and the image light emitted by the other is not processed by other optical elements. directly incident on the first reflective element.
  • the geometric path of the image light emitted from the first display area 111 to the reflection surface of the first sub-reflection element 210 is A1
  • the image light is reflected from the first sub-reflection element 210 to the reflection surface of the second reflection element 300 .
  • the geometric path of the image light is A2. Taking the image light emitted from the first display area 111 propagating in air (the refractive index n is about 1) as an example, the image light emitted from the first display area 111 to the second reflection element 300
  • the optical distance is (A1+A2).
  • the optical distance of the image light from the first display area 111 to the second reflection element 300 is equal to the optical distance of the main transmission light from the first display area 111 to the first sub-reflection element 210 plus the optical distance from the first sub-reflection element 210 is the optical distance traveled by the main transmission light reflected to the second reflective element 300 .
  • the geometric path of the image light emitted from the second display area 112 to the reflection surface of the second sub-reflection element 220 is B1 , and the image light is reflected from the second sub-reflection element 220 to the reflection surface of the second reflection element 300 .
  • the geometric path of the image light is B2. Taking the image light emitted from the second display area 112 propagating in air (the refractive index n is about 1) as an example, the image light emitted from the second display area 112 to the second reflection element 300 The optical distance is (B1+B2), and (A1+A2) ⁇ (B1+B2).
  • the optical distance of the image light from the second display area 112 to the second reflection element 300 is equal to the optical distance of the main transmission light from the second display area 112 to the second sub-reflection element 220 plus the optical distance from the second sub-reflection element 220 is the optical distance transmitted by the main transmission light reflected to the second reflective element 300 .
  • the distance between the first sub-reflection element and the first display area and the second reflection element and the distance between the second sub-reflection element and the second display area and the second The optical distances of the image rays emitted from the display areas to the second reflection element are different.
  • the second reflecting element 300 can be a curved mirror, for example, the curved mirror can be a concave mirror; in this case, the surface of the concave mirror close to the display area is a concave curved surface.
  • the curved mirror is a concave mirror (that is, a mirror whose reflective surface is a concave curved surface)
  • the curved surface of the curved mirror faces the display area, if the optical distance between the display area and the concave mirror is smaller than that of the concave mirror
  • the focal length of the mirror the concave mirror forms an upright enlarged virtual image based on the image output from the display area.
  • the concave reflection increases with the increase of the optical distance between the display area and the concave reflector, that is, the larger the optical distance between the display area and the concave reflector, the greater the optical distance between the display area and the concave reflector, the higher the optical distance between the display area and the concave reflector. The greater the distance between the user and the image he is viewing.
  • the reflection surface of the second reflection element 300 may be a free-form surface, that is, the reflection surface of the second reflection element 300 does not have rotational symmetry, so as to improve the imaging quality of the display device.
  • the display surface of the first display area 111 and the display surface of the second display area 112 are parallel, and the included angle between the reflection surface of the first sub-reflection element 210 and the reflection surface of the second sub-reflection element 220 is It is not greater than 20°, so that the virtual images formed by the image light rays displayed in the first display area and the second display area after being reflected by the second reflective element are substantially parallel.
  • the present disclosure is not limited thereto.
  • the angle between the reflection surface of the first sub-reflection element 210 and the reflection surface of the second sub-reflection element 220 may also be If the angle is greater than 20°, in this case, the virtual image formed by the image light displayed in the first display area and the second display area after being reflected by the second reflective element has a non-zero included angle.
  • the included angle between the display surface of the first display area 111 and the display surface of the second display area 112 may not be greater than 20°.
  • the angle of the reflection surface of the first sub-reflection element 210 relative to the reference surface is ⁇ 1
  • the second sub-reflection element 220 The angle of the reflective surface relative to the reference plane is ⁇ 2, and ⁇ 1 may be greater than ⁇ 2, or ⁇ 1 may be smaller than ⁇ 2.
  • the included angle between the reflection surface of the first sub-reflection element 210 and the reflection surface of the second sub-reflection element 220 is not greater than 15°.
  • the included angle between the reflection surface of the first sub-reflection element 210 and the reflection surface of the second sub-reflection element 220 is not greater than 10°.
  • the included angle between the reflection surface of the first sub-reflection element 210 and the reflection surface of the second sub-reflection element 220 is not greater than 5°.
  • the included angle between the reflection surface of the first sub-reflection element 210 and the reflection surface of the second sub-reflection element 220 is 0°.
  • the reflection surface of the first sub-reflection element 210 and the reflection surface of the second sub-reflection element 220 may be arranged in parallel.
  • first sub-reflection element 210 and the second sub-reflection element 220 may be flat mirrors, and the above “the angle between the reflection surface of the first sub-reflection element 210 and the reflection surface of the second sub-reflection element 220 is not greater than 15°" ” may refer to the included angle between two plane reflective surfaces not greater than 15°.
  • first sub-reflection element 210 and the second sub-reflection element 220 may also be one or more of curved mirrors, aspherical mirrors, spherical mirrors, etc.
  • the included angle between the surface and the reflection surface of the second sub-reflection element 220 is not greater than 15°" may refer to the included angle between the planes enclosed by the edges of the reflection surface being not greater than 15°.
  • the first sub-reflection element 210 and the second sub-reflection element 220 may be the same type of reflection mirror or different types of reflection mirrors.
  • the embodiment of the present disclosure schematically shows the first sub-reflection element 210 and the second sub-reflection element 220
  • the reflecting elements 220 are all flat reflecting mirrors. By using a flat reflector, the manufacture of the display device can be facilitated, the optical path in the display device can be folded to save space, and additional distortion and size changes can be avoided to the images displayed by the display device.
  • the second reflective element 300 may be a curved mirror, eg, a free-form curved mirror.
  • the setting of the curved mirror can make the head-up display have a longer imaging distance and a larger imaging size, and the curved mirror can also be combined with the reflection imaging part of the curved surface (subsequent mentioned) such as the windshield to eliminate the virtual image distortion caused by the reflection imaging part.
  • the image light emitted from the at least two display areas 110 includes only the first reflection elements 200 for reflecting the image light of the respective display areas 110 in the light path reflected by the first reflection element 200 to the second reflection element 300 .
  • the second sub-reflection element 220 is not in the light path of the image light emitted from the first display area 111 to the second reflection element 300
  • the first sub-reflection element 210 is not emitted from the second display area 112 to the second reflection element 300 in the light path.
  • the first display area 111 and the second display area 112 may be located on the same plane, then by adjusting the positions and angles of the first sub-reflection element 210 and the second sub-reflection element 220 , the at least two The optical distances of the image light rays emitted from the display area to the second reflection element are different.
  • the embodiment of the present disclosure is not limited thereto.
  • the first display area and the second display area may also be located on different planes, and the first sub-reflection element and the second sub-reflection element are located in the same plane (or different planes).
  • the positions of the display area and the second display area can realize that the optical distances of the image light rays emitted from the at least two display areas to the second reflection element are different.
  • the image source 100 includes a first sub-image source 101
  • the first sub-image source 101 includes a first display area 111 and a second display area 112
  • the first display area 111 and the second display area 112 may perform partitioned display for display areas located at different positions on the same sub-image source, for example, the same screen, so as to save space and cost.
  • the embodiment of the present disclosure is not limited thereto, and the first display area and the second display area may also be located on different sub-image sources, for example, the screens of different sub-image sources may be close to each other; for example, the display surfaces of different sub-image sources are parallel to each other so that the The first display area and the second display area are parallel.
  • the distance between different sub-image sources can be set larger to prevent the image light emitted from the two display areas from influencing each other.
  • the light shielding structure 400 when the first sub-image source 101 includes the first display area 111 and the second display area 112 , disposing the light shielding structure 400 between the first display area 111 and the second display area 112 can avoid different display areas
  • the emitted image rays affect each other.
  • the light shielding structure 400 may be a light blocking plate.
  • the first sub-image source 101 may include the above-mentioned light shielding structure 400, but is not limited thereto, and the above-mentioned light-shielding structure may not be the structure of the first sub-image source.
  • the above-mentioned light-shielding structure 400 can be located on the display side of the first sub-image source 101, for example, at least disposed on/installed on/attached (for example, can be attached, fixed, closely attached, adhered or adsorbed, etc.) on the first sub-image source 101 on the display screen of the image source 101 .
  • the first sub-reflection element 210 and the second sub-reflection element 220 may be two independent reflection elements, so that they can be adjusted independently.
  • the first sub-reflection element 210 and the second sub-reflection element 220 may also have an integral structure, and the two are integrally formed, such as a stepped reflection Mirror, which can be easily made and set up.
  • the connection portion 201 between the two sub-reflection elements hardly affects the propagation of image light emitted from any display area.
  • integral molding is as follows: it can be understood that at least part of the first sub-reflection element and at least part of the second sub-reflection element respectively belong to a part of an integral piece, rather than belong to separate parts.
  • the base material of the connecting part 201 can be the same as the material of the sub-reflection element, such as glass and other materials, and the side of the base material of the connecting part 201 facing the display area can be covered with black flannel or sprayed with black flannel paint, dark frosted and other materials
  • the fitting is explained as follows: one or more of black flannel or sprayed black fluff paint, dark frosted and other materials can be kept fixed with the side of the base material of the connecting part 201 facing the display area connect.
  • the connecting portion may also be made of different materials from the sub-reflection element, for example, one or more of plastic or metal structural members are used to connect and fix the first sub-reflection element and the second sub-reflection element at both ends. .
  • the optical distance (A1+A2) of the image light from the first display area 111 to the second reflection element 300 is smaller than the optical distance of the image light from the second display area 112 to the second reflection element 300 (B1+B2), then the virtual image formed by the second reflective element to the image light emitted from the second display area to the second reflective element is compared with the virtual image formed by the image light emitted from the first display area to the second reflective element. farther.
  • the second display area 112 is located on the side of the first display area 111 away from the second reflection element 300 , for example, the minimum distance between the second display area 112 and the second reflection element 300 is greater than that of the first display area 111 The minimum distance between the display area 111 and the second reflective element 300 .
  • the first display area 111 is located between the second display area 112 and the second reflection element 300 .
  • the second sub-reflection element 220 is located on the side of the first sub-reflection element 210 away from the second reflection element 300, for example, the minimum distance between the second sub-reflection element 220 and the second reflection element 300 is greater than that of the first sub-reflection element The minimum distance between 210 and the second reflective element 300.
  • the first sub-reflection element 210 is located between the second sub-reflection element 220 and the second reflection element 300 .
  • the distance between the center of the second sub-reflection element 220 and the second display area 112 is greater than the distance between the center of the first sub-reflection element 210 and the first display area 111 .
  • the geometric path B1 of the image light rays emitted from the second display area 112 to the reflection surface of the second sub-reflection element 220 is greater than the geometric path A1 of the image rays emitted from the first display area 111 to the reflection surface of the first sub-reflection element 210
  • the geometric path B2 of the image light reflected by the second sub-reflection element 220 to the reflecting surface of the second reflecting element 300 is greater than the geometric path A2 of the image light reflected by the first sub-reflecting element 210 to the reflecting surface of the second reflecting element 300 , by This (B1+B2)>(A1+A2).
  • the first display area 111 can display a close-up picture, such as displaying key driving data such as vehicle instruments, for example, displaying one or more parameters such as vehicle speed, fuel level, and steering;
  • the second display area 112 can display a long-range picture, such as construction, etc.
  • the distant view picture displayed in the second display area 112 may include a bank
  • the image of the bank displayed by the image source may include a logo of the bank
  • the logo image of the bank may be matched and merged with the actual location of the bank, so that the user can see the building in the distance
  • the logo of the bank is displayed on the display screen.
  • FIG. 3 shows a schematic plan view of the first display area and the second display area.
  • the area of the first display area 111 is smaller than that of the second display area 112 so that the imaging size of the virtual image formed by the second reflection element 300 reflecting the image light emitted by the first display area 111 is smaller than that of the second reflection element 300 is the imaging size of the virtual image formed by reflecting the image light emitted by the second display area 112 .
  • the shape of the first display area 111 and the shape of the second display area 112 may be the same, or the shapes of the two may also be different.
  • the size of the imaging area in the horizontal direction (for example, the direction parallel to the ground is the horizontal direction) after the first display area is reflected by the optical elements such as the first reflective element and the second reflective element is greater than or equal to that of the second display area.
  • the size in the vertical direction (for example, the direction perpendicular to the ground is the vertical direction) is smaller than or equal to the size in the vertical direction of the imaging area after the second display area is reflected by the optical elements such as the first reflective element and the second reflective element .
  • the first display area is configured to display a close-up picture
  • the display content of the close-up picture may be key driving parameters such as vehicle instruments, so that the size of the displayed close-up picture may be smaller
  • the second display area is configured to display a long-range picture
  • the display content of the long-range picture needs to be matched and merged with the real scene outside the car, such as a real scene such as a building, so that the size of the long-range picture displayed is larger than that of the close-up picture. For example, a smaller-sized close-up picture will not block a larger-sized distant picture.
  • FIG. 4 is a schematic partial structure diagram of a display device provided according to another example of an embodiment of the present disclosure.
  • the difference from the example shown in FIG. 1 is that at least two display areas 110 further include a third display area 113 , the first reflective element 200 further includes a third sub-reflection element 230 , and the third display area 113 emits After being reflected by the third sub-reflection element 230 , the image light of the image propagates to the second reflection element 300 .
  • the third sub-reflection element 230 is configured to reflect the image light emitted from the third display area 113 to the second reflection element 300 .
  • the light reflected by the third sub-reflection element 230 directly enters the second reflection element 300 .
  • other optical elements such as other reflective structures or lenses, may be disposed between the third sub-reflection element 230 and the second reflection element 300, and the light reflected by the third sub-reflection element 230 may be processed by the other optical elements and then incident on the third sub-reflection element 230.
  • Two reflective elements 300 may be disposed between the third sub-reflection element 230 and the second reflection element 300, and the light reflected by the third sub-reflection element 230 may be processed by the other optical elements and then incident on the third sub-reflection element 230.
  • no optical element may be arranged between the third display area and the third sub-reflection element, and the image light emitted by the third display area is directly incident on the third sub-reflection element; or the third display area and the third sub-reflection element Other optical elements, such as lenses, etc., may be provided, and the image light emitted by the third display area may be processed by other optical elements and then incident on the third sub-reflection element.
  • the display surface of the first display area 111 and the display surface of the second display area 112 are parallel, and the angle between the reflection surface of the first sub-reflection element 210 and the reflection surface of the second sub-reflection element 220 is not greater than 20°, and The included angle between the display surface of the first display area 111 and the display surface of the third display area 113 is 5° ⁇ 90°. Therefore, the virtual images formed by the image light displayed in the first display area and the second display area after being reflected by the second reflecting element are approximately parallel, while the image light displayed in the third display area is formed by being reflected by the second reflecting element. The virtual image is not parallel to the virtual image formed by the image light displayed in the first display area after being reflected by the second reflective element. For example, the angle between the two virtual images may be 5° ⁇ 90°.
  • the included angle between the display surface of the first display area 111 and the display surface of the third display area 113 is 10° ⁇ 80°.
  • the included angle between the display surface of the first display area 111 and the display surface of the third display area 113 is 30° ⁇ 70°.
  • the included angle between the display surface of the first display area 111 and the display surface of the third display area 113 is 45° ⁇ 60°.
  • the above-mentioned "the angle between the display surface of the first display area 111 and the display surface of the third display area 113" may refer to the angle between the plane where the first display area is located and the plane where the third display area is located.
  • the embodiment of the present disclosure takes the first display area and the third display area as a flat display area as an example, but is not limited to this.
  • the first display area and the third display area may also be non-planar display areas.
  • the included angle of the three display areas may refer to the included angle between the plane enclosed by the edge of the first display area and the plane enclosed by the edge of the third display area.
  • the inclined third display area 113 has a first end e1 close to the second display area 112 and an end e1 away from the second display area 112 .
  • the distance between the first end e1 of the third display area 113 and the plane where the second display area 112 is located is greater than the distance between the second end e2 and the plane.
  • the second end e2 of the third display area 113 may be located on the above-mentioned plane, and the first end e1 is closer to the area where the first reflection element 200 is located than the second end e2.
  • the second end e2 of the third display area 113 is farther away from the second reflective element 300 than the first end e1, so that the second The object distance at the end e2 is larger.
  • the distance between the first end e1 of the third display area 113 and the third sub-reflection element 230 is smaller than the distance between the second end e2 of the third display area 113 and the third sub-reflection element 230 .
  • the geometric path of the image light emitted from the first display area 111 to the reflection surface of the first sub-reflection element 210 is A1
  • the image light is reflected from the first sub-reflection element 210 to the reflection surface of the second reflection element 300 .
  • the geometric path of the image light is A2. Taking the image light emitted from the first display area 111 propagating in air (the refractive index n is about 1) as an example, the image light emitted from the first display area 111 to the second reflection element 300
  • the optical distance is (A1+A2).
  • the geometric path of the image light emitted from the second display area 112 to the reflection surface of the second sub-reflection element 220 is B1
  • the geometric path of the image light reflected from the second sub-reflection element 220 to the reflection surface of the second reflection element 300 is B2
  • the optical distance of the image light emitted from the second display area 112 to the second reflecting element 300 is (B1+B2 ).
  • the geometric path of the image light from the third display area 113 to the reflection surface of the third sub-reflection element 230 is C1
  • the geometric path of the image light from the third sub-reflection element 230 to the reflection surface of the second reflection element 300 is C2 , taking the image light emitted from the third display area 113 propagating in air (the refractive index n is about 1) as an example, the optical distance of the image light emitted from the third display area 113 to the second reflecting element 300 is (C1+C2 ).
  • the optical distance of the image light from the third display area 113 to the second reflection element 300 is equal to the optical distance of the main transmission light from the third display area 113 to the third sub-reflection element 230 plus the optical distance from the third sub-reflection element 230 is the optical distance transmitted by the main transmission light reflected to the second reflective element 300 .
  • the optical distances of the image rays emitted from the above three display areas to the second reflection element 300 satisfy the following relationship: (A1+A2) ⁇ (B1+B2) ⁇ (C1+C2).
  • the optical distances of the image rays emitted from the three display areas to the second reflective element can be different, for example, so that images can be formed at different distances, which is conducive to the performance of images at different distances and real scenes at different distances.
  • Matching and fusion so that when the display device is applied to the head-up display, the user does not need to switch back and forth between the image at a fixed distance and the real scene at different distances, which avoids the conflict of visual vergence adjustment and improves the use experience of the display device.
  • Embodiments of the present disclosure can adjust the distance between the first sub-reflection element and the first display area and the second reflection element, the distance between the second sub-reflection element and the second display area and the second reflection element, and the third sub-reflection element.
  • the distance between the reflective element and the third display area and the second reflective element realizes that the optical distances of the image rays exiting from the three display areas to the second reflective element are different.
  • the first sub-reflection element 210, the second sub-reflection element 220, and the third sub-reflection element 230 may be the same type of reflector or different types of reflectors.
  • the embodiment of the present disclosure schematically shows the first sub-reflector.
  • the reflection element 210 , the second sub-reflection element 220 and the third sub-reflection element 230 are all flat reflection mirrors.
  • the image light rays emitted from the at least two display areas 110 in the light paths reflected by the first reflective element 200 to the second reflective element 300 only include a first light beam for reflecting the image rays of the respective display areas 110 .
  • a reflective element 200 is
  • the second sub-reflection element 220 is not in the optical path of the image light emitted from the first display area 111 to the second reflection element 300 and the optical path of the image light emitted from the third display area 113 to the second reflection element 300;
  • the first The sub-reflection element 210 is not in the optical path of the image light emitted from the second display area 112 to the second reflection element 300 and the optical path of the image light emitted from the third display area 113 to the second reflection element 300;
  • the third sub-reflection element 230 It is not in the optical path of the image light emitted from the second display area 112 to the second reflection element 300 and the optical path of the image light emitted from the first display area 111 to the second reflection element 300 .
  • the optical distance (A1+A2) of the image light from the first display area 111 to the second reflection element 300 is smaller than the optical distance of the image light from the third display area 113 to the second reflection element 300 (C1+C2)
  • the optical distance (C1+C2) of the image light from the third display area 113 to the second reflection element 300 is smaller than the optical distance of the image light from the second display area 112 to the second reflection element 300 ( B1+B2), for example, (B1+B2)>(C1+C2)>(A1+A2), then the virtual image formed by the second reflective element to the image light emitted from the third display area is located in the first display area and between two virtual images formed by the image light emitted from the second display area.
  • the first display area 111 can display a close-up picture, such as displaying key driving data such as vehicle instruments, for example, displaying one or more of parameters such as vehicle speed, fuel level, and steering;
  • the third display area 113 can display a mid-range picture.
  • the third display area 113 can display a lane picture. For example, when the picture is tilted relative to the ground, the matching and fusion effect of the actual lane is better, and the user can see that the lane is marked by image fusion, and guide the user to take this lane;
  • the second display area 112 can display a distant view picture, such as a building, etc.
  • the second display area 112 displays a distant view picture, such as a bank
  • the image of the bank displayed by the image source can include the bank logo
  • the bank logo image can match the actual location of the bank Fusion so that users can see distant buildings, such as a bank, with the bank's logo on the display.
  • the first display area 111 is located on the side of the second display area 112 close to the second reflective element 300
  • the third display area 113 is located on the side of the second display area 112 away from the second reflective element 300
  • the third sub-reflection element 230 is located on the side of the second sub-reflection element 220 away from the second reflection element 200
  • the distance between the center of the third sub-reflection element 230 and the third display area 113 is smaller than that of the first sub-reflection element 210 The distance between the center and the first display area 111 .
  • the first display area 111 may be located between the second display area 112 and the second reflection element 300, the second display area 112 and the third display area 113 and the second reflection element 300, and the second sub-reflection element 220 may be located between the second display area 112 and the second reflection element 300. between the second reflection element 200 and the third sub-reflection element 230 .
  • the first display area 111 and the third display area 113 may be located on different image sources.
  • the image source 100 includes a first sub-image source 101 and a second sub-image source 102
  • the first sub-image source 101 includes a first display area 111 and a second display area 112
  • the second sub-image source 102 includes a third display area 113.
  • the angle between the display surface of the first display area 111 and the display surface of the third display area 113 may be the angle between the display surface of the first sub-image source 101 and the display surface of the second sub-image source 102 .
  • the virtual image formed by reflecting the image light emitted from the first display area by the second reflective element and the second sub-image source can be The virtual image formed by the reflection element reflecting the image light emitted from the third display area is not parallel, so as to satisfy the user's requirement for viewing the image.
  • the area of the third display area 113 may be larger than the area of the first display area 111 and the area of the second display area 112 , so that the second reflective element 300 reflects the image light emitted by the third display area 113 to form a virtual image.
  • the size is larger than the imaging size of the virtual image formed by the second reflection element 300 reflecting the image rays emitted from the first display area 111 and the second display area 112 .
  • the shape of the third display area 113 may be the same as that of at least one of the first display area 111 and the second display area 112, but not limited thereto, the first display area, the second display area and the third display area The shape, for example, can vary.
  • the medium shot displayed in the third display area is tilted.
  • setting the inclined picture can help the image to fit the road surface and improve the use effect; for example, because the inclined picture needs to match the actual road surface, the size of the inclined mid-range picture is larger, which can cover at least half or the whole Lane, so that the driver can have a better viewing effect, for example, the inclined mid-range image covers the lane line to make it easier for the driver to see the lane line after the image marking, which can better prompt the driver to keep or change lanes, Enhance the driving experience.
  • the imaging height of the inclined picture formed by the third display area is at least lower than the imaging height of the first display area and/or the second display area, so that the inclined picture can achieve a better effect on the ground.
  • the imaging height can be interpreted as: the distance between the virtual image and the direction of the road surface along the vertical direction.
  • the height of the inclined screen may be the lowest, or may be the second height.
  • the oblique picture can be located in the middle layer, which has a better grounding effect.
  • FIG. 5 is a schematic partial structure diagram of a display device provided according to another example of an embodiment of the present disclosure.
  • the difference from the example shown in FIG. 4 is that the sub-reflection elements in the first reflection element 200 close to the second reflection element 300 are transflective elements instead of flat reflection mirrors.
  • the third display area 113 is located on the side of the first display area 111 close to the second reflection element 300
  • the third sub-reflection element 230 is located at a side of the first sub-reflection element 210 close to the second reflection element 300 . side.
  • the first sub-reflection element 210 and the second sub-reflection element 220 are both flat mirrors
  • the third sub-reflection element 230 is a transflective element, and is configured to transmit the first sub-reflection element 210 and the second sub-reflection element 220 At least one of the image light rays is reflected toward the second reflective element 300 .
  • the third display area 113 is located between the first display area 111 and the second reflection element 300
  • the third sub-reflection element 230 is located between the first sub-reflection element 210 and the second reflection element 300 .
  • the third sub-reflection element 230 is configured to transmit the image light reflected by the first sub-reflection element 210 and the second sub-reflection element 220 toward the second reflection element 300 .
  • the third sub-reflection element 230 is configured to reflect the image light emitted from the third display area 113 to the second reflection element 300, and to transmit the first sub-reflection element 210 and the second sub-reflection element 220 and reflect toward the second reflection element 300 image light; the image light emitted by the second display area 112 is also transmitted by the third sub-reflection element 230 during the process of being reflected by the second sub-reflection element 220 to the second reflection element 300; the image emitted by the first display area 111 The light is also transmitted by the third sub-reflection element 230 during the process of being reflected by the first sub-reflection element 210 to the second reflection element 300 .
  • the reflectivity of the third sub-reflection element 230 to the image light emitted by the third display area 113 may be 30%, 40%, 50% or other applicable values, and at least for the first display area 111 and the second display area 112
  • the transmittance of one of the emitted image rays may be 70%, 60%, 50%, or other suitable values.
  • the transmittance of the third sub-reflection element 230 to the image light emitted from the first display area 111 and the second display area 112 may be 70%, 60%, 50% or other applicable values.
  • the third sub-reflection element 230 (ie, the transflective element) includes a polarized transflective element, the third display area 113 emits the first polarized light (polarized light with the first polarization), the first display area 111 and the second display area At least one of the regions 112 emits a second polarized light (polarized light having a second polarization), the polarization directions of the first polarized light and the second polarized light are perpendicular, and the transflective element is configured to reflect the first polarized light and transmit the second polarized light polarized light. For example, both the first display area 111 and the second display area 112 emit the second polarized light transmitted through the third sub-reflection element 230 .
  • the polarizing transflective element may be an element formed by coating or sticking a film on a transparent substrate.
  • the polarized transflective element can be a transflective film coated or pasted on the substrate with the characteristics of reflecting the first polarized light and transmitting the second polarized light, such as a reflective polarized brightness enhancement film (Dual Brightness Enhance Film, DBEF) or a prism One or more of Brightness Enhancement Film (BEF), etc.
  • DBEF Reflective polarized brightness enhancement film
  • BEF Brightness Enhancement Film
  • the transflective element may also be an integrated element.
  • the polarizing transflective element can be an optical film with a polarizing transflective function.
  • the polarizing transflective element can be formed by combining multiple layers of films with different refractive indices in a certain stacking order, and the thickness of each film layer is about Between 10 and 1000 nm; the material of the film layer can be selected from inorganic dielectric materials, such as one or more of metal oxides and metal nitrides; polymer materials can also be selected, such as polypropylene, polyvinyl chloride or poly One or more of ethylene etc.
  • one of the first polarized light and the second polarized light includes light in the S polarization state, and the other of the first polarized light and the second polarized light includes light in the P polarization state.
  • the angle between the polarization directions of the first polarized light and the second polarized light may be approximately 90°.
  • the embodiment of the present disclosure is not limited thereto.
  • the first polarized light and the second polarized light may also be non-S polarized light or non-P polarized light, such as
  • the first polarized light and the second polarized light can be two kinds of linearly polarized light whose polarization directions are perpendicular to each other, or two kinds of circularly polarized light whose polarization directions are perpendicular to each other, or two kinds of elliptically polarized light whose polarization directions are perpendicular to each other.
  • the transflective element is a wavelength selective transflective element
  • the wavelength band of the image light emitted by the first display area 111 is the first band group
  • the wavelength band of the image light emitted by the second display area 112 is the second wavelength band group
  • the transflective element is configured to reflect the image light of the first waveband group and transmit the image light of the second waveband group.
  • the above-mentioned "wavelength band” may include a single wavelength or a mixed range of multiple wavelengths.
  • a wavelength band includes a single wavelength, light at that wavelength may be mixed with light at nearby wavelengths due to process errors.
  • the image light of the first waveband group and the second waveband group may each include red, green, and blue (RGB) light in three wavebands, and the full width at half maximum of each of the RGB wavebands is not greater than 50 nm.
  • the first waveband group and the second waveband group both include image rays of three wavebands.
  • the peak value of the first waveband of the three wavebands is located in the range of 410nm to 480nm, and the peak value of the second waveband is located at 500nm. Within the range of ⁇ 565nm, the peak of the third band is located in the range of 590nm to 690nm.
  • the wavelength of the image light in the first band in the first band group is different from the wavelength of the image light in the first band in the second band group; the wavelength of the image light in the second band in the first band group is different from the wavelength of the image light in the first band in the second band group
  • the wavelength of the image light in the second band in the two-band group; the wavelength of the image light in the third band in the first band group is different from the wavelength of the image light in the third band in the second band group.
  • the wavelengths of the image rays of each wavelength band in the first wavelength band group are all smaller than the wavelengths of the image rays of each wavelength band in the second wavelength band group.
  • the wavelength of red light is 620 nanometers
  • the wavelength of green light is 500 nanometers
  • the wavelength of blue light is 450 nanometers.
  • the wavelength of red light is 650 nanometers
  • the wavelength of green light is 530 nanometers
  • the wavelength of blue light is 470 nanometers.
  • the wavelengths of the image rays of each wavelength band in the first wavelength band group are all larger than the wavelengths of the image rays of each wavelength band in the second wavelength band group.
  • the wavelength of red light is 670 nanometers
  • the wavelength of green light is 550 nanometers
  • the wavelength of blue light is 470 nanometers.
  • the wavelength of red light is 650 nanometers
  • the wavelength of green light is 530 nanometers
  • the wavelength of blue light is 450 nanometers.
  • the setting of the above wavelength band relationship can facilitate the fabrication of the wavelength selective transflective element.
  • the image rays of the first and second waveband groups may include image rays of multiple wavelength bands, for example, at least three wavelength bands of RGB to form color image rays, and the color image rays may form a color image.
  • the image rays of the first waveband group and the second waveband group may include image rays of one color waveband, for example, the image rays include one of the above-mentioned three wavebands of RGB; for another example, in the first waveband group
  • the image light includes any color band light in the visible light range to form a monochromatic image light, and the monochromatic image light can form a monochromatic image, which is the same as the above implementation process. similar.
  • the reflectivity of the third sub-reflection element 230 using the wavelength selective transflective element to the image light emitted from the third display area 113 may be 70%, 80%, 90%, 95% or other applicable values.
  • the transmittance of the image light emitted from the first display area 111 and the second display area 112 may be 70%, 80%, 90%, 95% or other applicable values. Therefore, the utilization rate of the image light by the third sub-reflection element can be improved, so as to minimize the optical energy loss of the image light emitted from the first display area, the second display area and the third display area.
  • the first sub-image source 101 and the second sub-image source 102 are image sources that can emit RGB mixed light, such as a light emitting diode (LED) display or a liquid crystal display (LCD).
  • LED light emitting diode
  • LCD liquid crystal display
  • the above wavelength selective transflective element may include a selective transflective film formed by stacking inorganic oxide films or polymer films, and the transflective film is formed by stacking at least two film layers with different refractive indices.
  • the "different refractive index” here means that the refractive index of the film layer is different in at least one of the three directions of xyz.
  • a transflective film with selective reflection and selective transmission characteristics can be formed, which can selectively reflect certain Light of one characteristic, light passing through another.
  • the composition of the film is selected from the group consisting of tantalum pentoxide, titanium dioxide, magnesium oxide, zinc oxide, zirconium oxide, silicon dioxide, magnesium fluoride, silicon nitride, silicon oxynitride , one or more of aluminum fluoride.
  • the film layer of the organic polymer material includes at least two thermoplastic organic polymer film layers.
  • two thermoplastic polymer film layers are alternately arranged to form an optical film, and the two thermoplastic polymer film layers have different refractive indices.
  • the molecules of the above organic polymer materials are chain-like structures.
  • thermoplastic polymer can be polyethylene terephthalate (PET) and its derivatives with different degrees of polymerization, polyethylene naphthalate (PEN) and its derivatives with different degrees of polymerization, One or more of polybutylene terephthalate (PBT) and its derivatives, etc.
  • the optical distance of the image light emitted from the third display area 113 and propagated to the second reflection element 300 is smaller than the optical distance of the image light emitted from the first display area 111 and propagated to the second reflection element 300 .
  • a display device includes: an image source; a first reflection element, configured to reflect image light emitted by the image source; and a second reflection element, configured to be reflected by the first reflection
  • the element reflects the image light that propagates toward the second reflective element.
  • the image source, the first reflective element, and the second reflective element in this embodiment may be the image source, the first reflective element, and the second reflective element shown in any of the examples in FIG. 1 to FIG. 5 .
  • a plurality of sub-virtual images are formed, and the plurality of sub-virtual images include a first sub-virtual image, a second sub-virtual image and a third sub-virtual image.
  • the first sub-virtual image can be a virtual image formed by the first display area after passing through the first reflective element and the second reflective element
  • the second sub-virtual image can be formed by the second display area after passing through the first reflective element and the second reflective element
  • the third sub-virtual image may be a virtual image formed by the third display area after passing through the first reflective element and the second reflective element.
  • the sub-virtual image with the intermediate imaging distance is inclined relative to the horizontal direction and the inclination degree is smaller than the included angle of the remaining two sub-virtual images relative to the horizontal direction. For example, take the direction parallel to the ground as the horizontal direction.
  • FIG. 7 is a schematic structural diagram of a head-up display provided according to an example of another embodiment of the present disclosure.
  • FIG. 7 schematically shows that the head-up display includes the display device and the reflective imaging part 500 shown in FIG. 4 as an example, the embodiment of the present disclosure is not limited to this, and the head-up display may also include any of the examples shown in FIGS. 1-2 to provide display device and reflection imaging unit.
  • the reflective imaging part 500 is located on the light-emitting side of the second reflective element 300 , and is configured to reflect the image light reflected from the second reflective element 300 to the reflective imaging part 500 to the observation area 600 and transmit the light to the observation area 600 .
  • ambient light A user located in the observation area 600 can view a plurality of virtual images 1110 - 1130 formed by the image light emitted by the reflective imaging part 500 to the display device and the environmental scene located on the side of the reflective imaging part 500 away from the observation area 600 .
  • the optical distance of the main transmission light from the first display area 111 to the reflection imaging part 500 and the optical distance of the main transmission light from the second display area 112 to the reflection imaging part 500 may be the same or different.
  • the optical distance of the main transmission light from the first display area 111 to the second reflection element 300 is different from the optical distance of the main transmission light from the second display area 112 to the second reflection element 300.
  • the first display area 111 The optical distance between the second reflective element 300 and the reflective imaging part 500 and the optical distance between the second reflective element 300 and the reflective imaging part 500 for the main transmission light emitted from the second display area 112 Can be the same, or can be different.
  • the optical distance of the main transmission light emitted from the first display area 111 between the second reflection element 300 and the reflection imaging part 500 is different from that of the main transmission light emitted from the second display area 112 between the second reflection element 300 and the reflection imaging part 500 .
  • the optical distance transmitted between the parts 500 , the optical distance transmitted by the main transmission light from the first display area 111 to the second reflection element 300 and the optical distance of the main transmission light from the second display area 112 to the second reflection element 300 Can be the same, or can be different.
  • the optical distance between the first display area 111 and the reflective imaging part 500 the optical distance between the second display area 112 and the reflective imaging part 500 , and the optical distance between the third display area 113 and the reflective imaging part 500
  • the three optical distances may be different, or the two may be the same, or both may be the same.
  • the optical distance of the main transmission light from the first display area 111 to the second reflection element 300 the optical distance of the main transmission light from the second display area 112 to the second reflection element 300 , and the output of the third display area 113
  • the optical distances transmitted by the main transmission light to the second reflection element 300 may be different, for example, or at least two of them may be the same, or both may be the same.
  • the main transmission light emitted from the first display area 111 is reflected on the second reflection element 300 and The optical distance transmitted between the imaging parts 500, the optical distance of the main transmission light emitted from the second display area 112 between the second reflective element 300 and the reflective imaging part 500, and the main transmission light emitted from the third display area 113 in the first
  • the optical distances transmitted between the two reflection elements 300 and the reflection imaging part 500 may be different, for example, or at least two of them may be the same, or for example, a plurality of them may be the same.
  • the image light emitted by the display device is incident on the reflective imaging part 500, and the light reflected by the reflective imaging part 500 is incident on the user, for example, the observation area 600 where the driver's eyes are located, and the user can observe the virtual image formed, for example, outside the reflective imaging part , and does not affect the user's observation of the external environment.
  • the above-mentioned observation area 600 may be an eyebox area
  • the eyebox area refers to a plane area where the user's eyes are located and where the image displayed by the head-up display can be seen.
  • the user's eyes deviate from the center of the eye box area by a certain distance, such as moving up and down, left and right for a certain distance, the user can still see the image displayed by the head-up display when the user's eyes are still in the eye box area.
  • the reflection imaging part 500 may be a windshield or an imaging window of a motor vehicle.
  • the windshield is a windshield
  • the imaging window is a transparent imaging plate.
  • the windshield is used to transmit and reflect the image light from the windshield head-up display (W-HUD) and the imaging window is used to transmit and reflect the image light from the combined head-up display (C-HUD).
  • W-HUD windshield head-up display
  • C-HUD combined head-up display
  • the image light emitted from the first display area 111 in the first sub-image source 101 is reflected by the first sub-reflection element 210 to the second reflection element 300 , and the second reflection element 300 reflects the image light.
  • a first virtual image 1110 is formed; the image light emitted by the second display area 112 in the first sub-image source 101 is reflected by the second sub-reflection element 220 to the second reflection element 300, and the second reflection element 300 will The image light is reflected to the reflection imaging part 500 to form a second virtual image 1120; the image light emitted from the third display area 113 in the second sub-image source 102 is reflected by the third sub-reflection element 230 to the second reflection element 300, and the second The reflection element 300 reflects the image light to the reflection imaging part 500 to form a third virtual image 1130 .
  • the distance between the first virtual image 1110 and the observation area 600 is 2-4 meters
  • the distance between the second virtual image 1120 and the observation area 600 is 20-50 meters
  • the distance between the first virtual image 1110 and the observation area 600 is 2.5-3.5 meters
  • the distance between the second virtual image 1120 and the observation area 600 is 30-40 meters
  • the first virtual image 1110 may be a close-up picture, such as displaying key driving data such as vehicle instruments, for example, displaying one or more of parameters such as vehicle speed, fuel level, and steering;
  • the third virtual image 1130 may be a medium-view picture
  • the third virtual image can be a lane image.
  • the second virtual image 1120 may be a distant view image, such as a building, for example, a bank.
  • the image of the bank displayed by the second virtual image may include the logo of the bank, and the image of the logo of the bank may be matched and merged with the actual location of the bank, so that the user can see the distance in the distance.
  • the first virtual image 1110 and the second virtual image 1120 are parallel to the viewing area 600 .
  • the first virtual image 1110 and the second virtual image 1120 can be images perpendicular to the ground and can be fused with the real scene.
  • the fusion can be interpreted as: the virtual image covers the real scene, or It is located around the real scene and realizes the identification function of the real scene.
  • the display surface of the first display area 111 and the display surface of the second display area 112 may be parallel or nearly parallel to the ground.
  • the first virtual image and the second virtual image may be along a vertical direction, which may refer to a direction parallel to a plane where the viewing area is located, or a direction perpendicular to the driving surface of the traffic device.
  • the placement height of the second sub-reflection element 220 may be higher than that of the first sub-reflection element 220 .
  • the sub-reflection elements corresponding to the above-mentioned display areas may not be parallel to the ground, for example, the end of the corresponding sub-reflection element close to the second reflection element
  • the distance from the display area is greater than the distance between the end of the corresponding sub-reflection element far from the second reflection element and the display area, but not limited to this, for example, the corresponding sub-reflection element can reflect the image light emitted by the display area. Reflected towards the second reflective element.
  • the corresponding sub-reflection element can be explained as follows: the image light emitted by the sub-reflection element corresponding to the display area will be incident on the corresponding reflection element.
  • the angle between the third virtual image 1130 and the first virtual image 1110 is 5° ⁇ 90°, and the end of the third virtual image 1130 away from the ground is farther from the observation area 600 than the end of the third virtual image 1130 close to the ground. Realize the tilt of the picture, so that the matching and fusion effect with the actual lane is better.
  • the included angle between the third virtual image 1130 and the first virtual image 1110 is 10° ⁇ 80°.
  • the included angle between the third virtual image 1130 and the first virtual image 1110 is 30° ⁇ 70°.
  • the included angle between the third virtual image 1130 and the first virtual image 1110 is 45° ⁇ 60°.
  • the third virtual image is tilted away from the viewing area.
  • at least one of the first virtual image 1110 , the second virtual image 1120 and the third virtual image 1130 is inclined in a direction away from the observation area 600 .
  • a certain angle exists between the display surface of the second sub-image source 102 and the display surface of the first sub-image source 101 , so that the third virtual image 1130 formed by the second sub-image source 102 and the third virtual image 1130 formed by the first sub-image source 101 There is also a certain angle between the first virtual image 1110 and the second virtual image 1120 .
  • the third virtual image 1130 is inclined toward the traveling direction of traffic equipment such as vehicles, and the inclined screen can match the image to the road surface.
  • the angle between the third virtual image 1130 and the road surface can be 5° ⁇ 90°.
  • the virtual image formed by the second display area 112 reflected by the second reflecting element 300 is located at the focal plane of the reflection imaging part 500 , or the distance between the virtual image and the reflection imaging part 500 is smaller than the focal length and the virtual image is Near the focal plane of the reflection imaging unit 500 .
  • the second virtual image 1120 will be formed at a relatively far distance or even infinity, which is suitable for matching and fitting with the real scene in the distance.
  • the head-up display provided by the embodiments of the present disclosure can form multiple layers of images (for example, a first virtual image, a second virtual image, and a third virtual image), and the imaging distances of different images are different, and different images can be fused with real scenes at different distances,
  • the line of sight of a user (such as a driver) does not need to switch back and forth between the image at a fixed distance and the real scene at different distances, which effectively improves the use experience of the head-up display.
  • the head-up display provided by the embodiments of the present disclosure can form multi-layer images (for example, a first virtual image, a second virtual image, and a third virtual image), and the multi-layer images can be set as shown in FIG. set as shown in Figure 6b.
  • the embodiment of the present disclosure is not limited to this, and the inflow and multi-layer images may also adopt other setting manners.
  • the head-up display further includes a package housing 700 having an opening 710
  • the image source 100 , the first reflective element 200 and the second reflective element 300 are all located in the package housing 700
  • the reflective imaging part 500 is located in the package Outside the housing 700
  • the second reflecting element 300 reflects the image light emitted by the image source 100 to the position of the opening 710 of the packaging housing 700 to exit from the opening 710 of the packaging housing 700 and exit from the opening 710 of the packaging housing 700
  • the image light is reflected by the reflection imaging part 500 to the observation area 600 .
  • FIG. 7 schematically shows that the third virtual image 1130 is an oblique virtual image, and the distance between the third virtual image 1130 and the observation area 600 is greater than the distance between the first virtual image 1110 and the observation area 600 , and smaller than the second virtual image 1120
  • the distance from the observation area 600 for example, the third virtual image 1130 is located between the first virtual image 1110 and the second virtual image 1120 .
  • the oblique virtual image may also be the virtual image with the farthest distance from the observation area, or the virtual image with the closest distance from the observation area, which is not limited in the embodiment of the present disclosure.
  • the virtual image formed by the image light emitted by the first display area 111 being reflected by the reflective imaging unit 500 is the first virtual image 1110
  • the image light emitted by the second display area 112 is reflected by the
  • the virtual image formed by reflection by the reflection imaging part 500 is the second virtual image 120
  • the virtual image formed by the image light emitted by the third display area 113 being reflected by the reflection imaging part 500 is the third virtual image 130 , the first virtual image 130 .
  • the inclination of the virtual images centered from the observation area 600 relative to the horizontal direction is smaller than the included angles of the remaining two virtual images relative to the horizontal direction.
  • the horizontal direction may refer to a direction perpendicular to the plane where the observation area is located, or a direction parallel to the driving surface of the traffic device.
  • the embodiment of the present disclosure is not limited to the first virtual image and the second virtual image being arranged in the vertical direction, and the third virtual image being arranged in the oblique direction.
  • one of the first virtual image and the second virtual image may also be an oblique virtual image, for example, along the direction from the virtual image to the observation area, the virtual image is inclined toward the observation area.
  • at least one of the display surface of the first display area and the display surface of the second display area may be inclined, for example, the display surface of the third display area shown in FIG.
  • the formed virtual image can be set obliquely.
  • FIG. 8 is a schematic structural diagram of the packaging case in the head-up display shown in FIG. 7 .
  • a transparent dustproof film 720 is provided at the position of the opening 710 of the packaging case 700 to encapsulate the opening 710.
  • the transparent dustproof film 720 can prevent dust and sundries from entering the interior of the package housing, but does not affect the image light emitted from the opening 710 to the reflection imaging part 500 , so the transparent dustproof film 720 adopts a transparent film material.
  • a light shield 730 is provided outside the transparent dustproof film 720,
  • the light shield 730 is not passed by the light path of the image light emitted from the opening 710 to the reflected imaging part 500 , and the light shield 730 is configured to shield part of the ambient light O1 .
  • the light shield 730 may be made of the same material as the package case 700 and formed in the same process as the package case 700 to save process.
  • the shading cover 730 can be an inclined surface, which is used to prevent glare from entering the eyes of the user in the observation area, which can improve the use experience of the head-up display.
  • the opening of the packaging case 700 may be located at the upper part of the case, and the light shield 730 may be located at the upper side of the opening to block part of the ambient light 01 .
  • FIG. 9 is a schematic structural diagram of a head-up display provided according to another example of another embodiment of the present disclosure.
  • FIG. 9 schematically shows that the head-up display includes the display device and the reflective imaging part 500 shown in FIG. 5 as an example, the embodiment of the present disclosure is not limited to this, and the head-up display may also include any of the examples shown in FIGS. 1-2 to provide display device and reflection imaging unit.
  • the difference between the head-up display in the example shown in FIG. 9 and FIG. 7 is that the display device shown in FIG. 4 is used in FIG. 7 , while the display device shown in FIG. 5 is used in FIG. 9 .
  • the head-up display in the example shown in FIG. 7 has the same characteristics and will not be repeated here.
  • the image light emitted from the first display area 111 in the first sub-image source 101 is reflected by the first sub-reflection element 210 and transmitted by the third sub-reflection element 230 , it enters the second sub-reflection element 230 .
  • the reflection element 300, the second reflection element 300 reflects the image light to the reflection imaging part 500 to form a first virtual image 1110; the image light emitted from the second display area 112 in the first sub-image source 101 is reflected by the second sub-reflection element 220 After being reflected and transmitted by the third sub-reflection element 230, it is incident on the second reflection element 300, and the second reflection element 300 reflects the image light to the reflection imaging part 500 to form a second virtual image 1120; the second sub-image source 102 The image light emitted from the third display area 113 is reflected by the third sub-reflection element 230 to the second reflection element 300 , and the second reflection element 300 reflects the image light to the reflection imaging part 500 to form a third virtual image 1130 .
  • the first virtual image, the second virtual image and the third virtual image in this example have the same characteristics as the first virtual image, the second virtual image and the third virtual image in the example shown in FIG. 7 , and details are not repeated here.
  • the image source in at least one embodiment of the present disclosure may include a light source, a backlight assembly, and an image generating part.
  • the light source may include at least one electroluminescent device that generates light through electric field excitation, such as Light Emitting Diode (LED), Organic Light-Emitting Diode (OLED), Mini Light Emitting Diode (Mini LED), Micro LED (Micro LED), Cold Cathode FluoreScent Lamp (CCFL), Cold LED Light (CLL), Electro LumineScent (EL), Electron Emission (Field EmiSSion DiSPlay, FED) ) or quantum dot light source (Quantum Dot, QD), etc.
  • LED Light Emitting Diode
  • OLED Organic Light-Emitting Diode
  • Mini LED Mini Light Emitting Diode
  • Micro LED Micro LED
  • Cold Cathode FluoreScent Lamp CCFL
  • Cold LED Light CLL
  • Electro LumineScent EL
  • Electron Emission Field EmiSSion DiSPlay, FED
  • QD quantum dot light source
  • the image generating section may include a liquid crystal display panel.
  • the liquid crystal display panel may include an array substrate, an opposite substrate, a liquid crystal layer between the array substrate and the opposite substrate, and a frame sealant for encapsulating the liquid crystal layer.
  • the liquid crystal display panel further includes a first polarizing layer disposed on a side of the array substrate away from the opposite substrate and a second polarizing layer disposed on a side of the opposite substrate away from the array substrate.
  • the light source is configured to provide a backlight to the liquid crystal display panel, which is converted into image light after passing through the liquid crystal display panel.
  • the polarization axis direction of the first polarizing layer and the polarization axis direction of the second polarizing layer are perpendicular to each other, but not limited thereto.
  • the first polarizing layer may pass the first linearly polarized light
  • the second polarizing layer may pass the second linearly polarized light, but not limited thereto.
  • the polarization direction of the first linearly polarized light is perpendicular to the polarization direction of the second linearly polarized light, but not limited thereto.
  • the backlight assembly may include a reflective light guide element, a light beam condensing element and a light beam diffusing element, and the reflective light guiding element, the light beam condensing element and the light beam diffusing element are sequentially disposed between the light source and the image generating part.
  • the reflective light guide element is arranged in the light emitting direction of the light source. The light emitted by the light source propagates in the reflective light guide element and exits to the beam condensing element, and the light emitted by the beam converging element enters the beam diffusing element.
  • FIGS. 10A to 10D are schematic structural diagrams of a reflective light guide element provided according to an embodiment of the present disclosure.
  • FIG. 10A is a schematic cross-sectional view of the reflective light guide element shown in FIG. 10B .
  • the reflective light guide element 60 is arranged in the light exit direction of the light source 10 , and the light emitted by the light source 10 propagates in the reflective light guide element 60 and then exits the light beam condensing element.
  • the inner surface of the reflective light guide element 60 is provided with a reflective surface, and the large-angle light emitted by the light source 10 (the angle relative to the center line of the reflective light guide element 60 ) will pass through the reflective surface. After the reflection, the light is gathered, and the utilization rate of the light emitted by the light source 10 is improved.
  • the reflective light guide element 60 may be a hollow casing with a reflective surface disposed inside, and the casing includes an end for arranging the light source 10 and a light outlet 60-1 for emitting light.
  • the shape of the housing may be a triangular pyramid shape, a quadrangular pyramid shape or a paraboloid shape.
  • the shape of the light outlet 60-1 and the end portion can be rectangle, square, trapezoid or parallelogram or a combination of many of them, and the shape of the light outlet 60-1 and the end portion can be The same can also be different.
  • the reflective light guide element 60 may include a solid transparent member, the solid transparent member includes an end portion 63 where the light source 10 is disposed, and the refractive index of the transparent member is greater than 1, so that part of the light emitted by the light source 10 is solid and transparent
  • the internal reflection surface of the component is totally reflected and then exits, and another part of the light emitted by the light source 10 is transmitted and exited in the transparent component.
  • the end 63 of the solid transparent component where the light source 10 is disposed is provided with a cavity 62, and the side of the cavity 62 close to the light emitting surface 60-1 is provided with a collimating portion 61 that can adjust the light emitted by the light source 10 into parallel light.
  • the internal reflection surface of the solid transparent member may be the inner surface of the solid transparent member, for example, the shape of the inner surface may include a parabolic shape or a free-form surface shape.
  • the reflective light guide element 60 may include a solid transparent part, the end 63 of the solid transparent part where the light source 10 is arranged is provided with a cavity 62 , and the light emitting surface 60 - 1 of the solid transparent part is provided with a cavity 62 toward the end
  • the bottom surface of the opening 60-2 close to the end portion 63 is provided with a collimating portion 61 that can adjust the light emitted by the light source 10 into parallel light.
  • FIG. 11 is a schematic structural diagram of a combination of a beam condensing element and a reflective light guide element provided according to an embodiment of the present disclosure
  • FIG. 12 is a light path of a combination of a reflective light guide element, a beam converging element, and a beam diffusing element provided according to an embodiment of the present disclosure Schematic.
  • the beam condensing element 70 is configured to control the direction of the light 71 emitted from the reflective light guide element 60 , so that the light 72 emitted from the beam condensing element 70 can be concentrated to a certain range, for example, the observation of the image source The range can further gather the light and improve the utilization of light.
  • the light beam converging element 70 may include a lens or a lens combination, such as one or more of a convex lens, a Fresnel lens, or a lens combination, and a convex lens is used as an example for schematic illustration in FIG. 11 .
  • the above-mentioned certain range may be a point, such as the focal point of a convex lens, or it may be an area with a smaller area. Setting the beam converging element in the image source can further condense the large-angle light emitted by the light source and improve the utilization rate of the light.
  • the beam diffusing element 80 diffuses the incident beam 72 and can precisely control the degree of diffusion of the incident beam 72 .
  • the optical axis OA of the diffused beam 81 and the optical axis of the incident beam 72 are located on the same straight line
  • the optical axis of the light beam passing through the light beam diffusing element 80 can be kept unchanged, and the edge rays of the diffused light beam 81 are spread out by a certain angle along the optical axis thereof.
  • optical axis refers to the center line of the light beam.
  • the diffusion angle ⁇ 1 of the diffused light beam 81 in the first direction may range from 5° to 20°, and the range of the diffusion angle ⁇ 2 in the second direction may be 5° to 10°.
  • the diffusion angle refers to the two maximum lines of sight.
  • the cross-sectional spot of the light beam along the propagation direction may be a rectangle.
  • the first direction is the extension direction of the long side of the rectangle
  • the second direction is the extension direction of the short side of the rectangle.
  • the diffusion angle of the direction refers to the included angle ⁇ 1 between the light rays connected to the two ends of the long side of the rectangular light spot
  • the above-mentioned diffusion angle of the second direction refers to the included angle ⁇ 2 of the light rays connected to the two ends of the short side of the rectangular light spot.
  • the cross-sectional shape of the light beam refers to the cross-section obtained by cutting the light ray exiting the beam diffusing element using a plane perpendicular to the centerline or main transmission axis of the light beam, ie the cross-section of the light beam is perpendicular to the centerline of the light beam.
  • the incident light beam 72 passes through the beam diffusing element 80 , it will be diffused into a light spot with a specific size and shape along the propagation direction, and the energy distribution is uniform. Structure is precisely controlled.
  • the above-mentioned specific shapes may include, but are not limited to, linear, circular, oval, square, and rectangular.
  • the propagation angle and spot size of the diffused beam determine the brightness and visible area of the final image. The smaller the diffusion angle, the higher the imaging brightness and the smaller the visible area; and vice versa. Specific can be interpreted as follows: is the meaning of presupposition.
  • the beam diffusing element 80 can be a low-cost scattering optical element, such as one or more of a homogenizing sheet, a diffusing sheet, etc.
  • the scattering optical element such as the homogenizing sheet
  • scattering will occur, and the A small amount of diffraction, but scattering plays a major role, and a larger spot is formed when the beam passes through the scattering optics.
  • the beam diffusing element 80 can also be a diffractive optical element (Diffractive Optical Elements, DOE) that controls the diffusing effect more precisely, such as a beam shaper (Beam Shaper).
  • DOE diffractive Optical Elements
  • Beam Shaper Beam Shaper
  • the first predetermined area refers to a plane observation area
  • Most of the light is collected in the first predetermined area (for example, more than 90% of the light intensity of the light beams incident on the plane where the first predetermined area is located is collected in the first predetermined area, and the light incident on the plane where the first predetermined area is located is collected.
  • the light beam diffusing element 800 is removed from the optical path of the display device, the light emitted by the display device is reflected by the reflection imaging part 500 and then reaches the second predetermined area located in the first predetermined area.
  • the second predetermined area may be a small area.
  • the second predetermined area may be a point.
  • the second predetermined area may be a certain range where the light beam condensing element 70 collects the light.
  • the first predetermined area may include an eyebox area, namely the observation area 600
  • the second predetermined area may be a small area in the observation area 600 , such as a point, such as the center.
  • FIG. 13 is a schematic partial structural diagram of a head-up display provided according to another example of another embodiment of the present disclosure.
  • the reflection imaging part 500 includes a first layer 20-1, a second layer 20-2, and a gap between the first layer 20-1 and the second layer 20-2 (hereinafter referred to as an interlayer) ; the wedge-shaped film 21 is located in the interlayer of the reflective imaging part 500 (ie, the gap between the first layer 20-1 and the second layer 20-2).
  • the light incident on the reflective imaging part 500 of the display device 1000 may have the effect of eliminating ghost images due to the wedge-shaped film provided in the reflective imaging part 500 .
  • the reflection imaging part 500 is exemplified by the reflection imaging part 500 provided with the wedge-shaped film 21 on the windshield of the vehicle (eg, the front windshield) and the head-up display shown in FIG. 13 having an anti-ghosting function.
  • the windshield adopts a double-layer glass structure, and a wedge-shaped polyvinyl butyral (PVB) layer is embedded between the two layers of glass.
  • PVB polyvinyl butyral
  • the images reflected from the inner and outer surfaces of the glass ie, the image reflected from the first layer 20-1 and the image reflected from the second layer 20-2) can be made to overlap into one image, thereby enabling the head-up display to have ghosting suppression (eg, eliminating the ghosting) function.
  • the wedge-shaped film 21 has a thin end and a thick end, and also has a certain angle, and the angle of the wedge-shaped film 21 needs to be set according to the requirements of the head-up display.
  • images reflected from the surfaces of the reflective imaging part close to the display device and away from the display device can be overlapped into one image to solve the ghosting problem.
  • FIG. 14 is a schematic partial structural diagram of a head-up display provided according to another example of another embodiment of the present disclosure.
  • the surface of the reflection imaging part 500 facing the display device is provided with a selective reflection film 501 , a P-polarized light reflection film 501 or a first retardation part 501 .
  • the surface of the reflective imaging part 500 facing the display device is provided with a selective reflection film 501, and the selective reflection film 501 is configured so that the reflectivity of the wavelength band where the image light emitted by the display device is located is greater than that of the wavelength band where the image light emitted by the display device is located.
  • the reflectance of light in the wavelength band may be greater than 80%, 90%, 95%, 99.5% or other applicable values.
  • the reflectivity of the selective reflection film 501 to light in wavelength bands other than the wavelength band of the image light emitted from the display device may be less than 30%, 20%, 10%, 5%, 1%, 0.5% or other applicable values.
  • the selective reflection film 501 is configured to reflect the image light emitted by the display device, and transmit light in a wavelength band other than the wavelength band of the image light emitted by the display device.
  • the selective reflection film 501 only reflects the image light emitted by the display device.
  • the image light includes light in three wavelength bands of red, green and blue (RGB)
  • the selective reflection film 501 can only reflect the light in the three wavelength bands of RGB and transmit other light in the three wavelength bands. wavelengths of light. The image light will not be reflected twice on the surface of the reflective imaging part away from the display device, which can eliminate ghosting.
  • the above-mentioned selective reflection film 501 may include a selective transflective film formed by stacking inorganic oxide films or polymer films, and the transflective film is formed by stacking at least two film layers with different refractive indices.
  • the "different refractive index" here means that the refractive index of the film layer is different in at least one of the three directions of xyz.
  • a transflective film with selective reflection and selective transmission characteristics can be formed, which can selectively reflect certain Light of one characteristic, light passing through another.
  • the composition of the film is selected from the group consisting of tantalum pentoxide, titanium dioxide, magnesium oxide, zinc oxide, zirconium oxide, silicon dioxide, magnesium fluoride, silicon nitride, silicon oxynitride , one or more of aluminum fluoride.
  • the film layer of the organic polymer material includes at least two thermoplastic organic polymer film layers.
  • two thermoplastic polymer film layers are alternately arranged to form an optical film, and the two thermoplastic polymer film layers have different refractive indices.
  • the molecules of the above organic polymer materials are chain-like structures.
  • thermoplastic polymer can be polyethylene terephthalate (PET) and its derivatives with different degrees of polymerization, polyethylene naphthalate (PEN) and its derivatives with different degrees of polymerization, One or more of polybutylene terephthalate (PBT) and its derivatives, etc.
  • the image light emitted by the display device may include light in the P-polarized state
  • the surface of the reflection imaging part 500 facing the display device is provided with a P-polarized light reflective film 501 to reflect the light in the P-polarized state emitted by the display device toward the reflection imaging part 500 ( That is, P-polarized light)
  • the reflectivity of the P-polarized light reflective film 501 to the light of the P-polarized state is greater than the reflectivity of the light of the S-polarized state.
  • the image light in the P-polarized state can be reflected by the P-polarized light reflective film 501 and then incident on the observation area 600 .
  • the material of the reflection imaging part 500 includes glass
  • the transmittance of the glass to P-polarized light is high, and the reflectivity is low.
  • the P-polarized light reflected by the P-polarized light reflective film 501 the P-polarized light transmitted through the glass
  • the brightness reflected by the outer surface of the reflected imaging part 500 toward the observation area 600 is very low, which can eliminate ghost images.
  • the structure of the P-polarized light reflective film is similar to that of the above-mentioned selective reflective film, and can be realized by stacking multiple layers of films, which can be a structure formed by stacking organic films or inorganic films.
  • the P-polarized light reflective film may be a reflective polarizer mirror (RPM), for example, an RPM film.
  • RPM reflective polarizer mirror
  • the surface of the reflective imaging part 500 facing the display device is provided with a first phase retardation part 501
  • the light emitted from the display device includes light in an S-polarized state (ie, S-polarized light)
  • the first phase retardation part 501 is configured to emit light into
  • the light in the S-polarized state of the first phase retardation part 501 is converted into light in the non-S-polarized state, for example, one or more of the light in the P-polarized state, circularly polarized light, or elliptically polarized light.
  • the image light emitted by the display device includes light in the S polarization state
  • the first phase retardation part 501 may be a 1/2 wave plate
  • a part of the light in the S polarization state incident on the first phase retardation part 501 may be reflected by the imaging part 500 is reflected to the observation area 600, and the other part is converted into the light of the P polarization state by the first phase retardation part 501.
  • the light of the P polarization state has a very low reflectivity on the outer inner surface of the reflection imaging part 500, and is basically transmitted out, which can be eliminated. ghosting.
  • the image light emitted by the display device includes light in the S polarization state
  • the first phase retardation part 501 may be a 1/4 wave plate
  • a part of the light in the S polarization state incident on the first phase retardation part 501 may be reflected by the imaging part 500 is reflected to the observation area 600, and the other part is converted into circularly polarized light by the first phase retardation part 501.
  • the circularly polarized light has a very low reflectivity on the outer inner surface of the reflection imaging part 500, which can eliminate ghosting.
  • the surface of the first phase retardation part 501 is close to the surface of the reflection imaging part 500;
  • the reflection imaging section 500 is also enlarged in the figure. For example, the thickness of the reflection imaging part 500 is enlarged.
  • ghosting can be effectively eliminated by arranging a wedge-shaped film, a selective reflection film, a P-polarized light reflection film or a first phase retardation part in the reflection imaging part.
  • the reflection imaging part such as the windshield of a motor vehicle, has a relatively high reflectivity to the light in the S-polarized state (S-polarized light), and the light emitted by the display device of the head-up display generally includes S-polarized light.
  • S-polarized light S-polarized light
  • the sunglasses filter S-polarized light, and the driver cannot see the image of the head-up display when wearing the sunglasses.
  • a P-polarized light reflective film is provided on the side of the reflective imaging part 500 in the head-up display facing the display device, and when the image light emitted by the display device includes light in the P-polarized state, the reflective imaging is performed.
  • the part 500 can reflect the image light in the P-polarized state to the observation area 600 so that a user wearing sunglasses whose eyes are located in the observation area 600 can still see the image displayed by the display device, thereby improving the user experience.
  • FIG. 15 is a schematic partial structural diagram of a head-up display provided according to another example of another embodiment of the present disclosure.
  • a second phase retardation part 502 such as a quarter wave plate, is provided between the display device of the head-up display and the reflection imaging part 500 .
  • the above-mentioned second phase retardation part 502 is not closely arranged on the reflection imaging part 500 of the head-up display. After the two-phase retardation part 502 is reflected by the reflection imaging part 500 , it does not enter the second phase retardation part 502 again, but directly exits the observation area 600 .
  • the light emitted from the display device includes the light of the S polarization state
  • the second phase retardation part 502 is configured to convert the light of the S polarization state incident to the second phase retardation part 502 into the light of the circular polarization state (circularly polarized light) Or elliptically polarized light (elliptically polarized light)
  • circularly polarized light or elliptically polarized light is reflected by the reflection imaging part 500 and then directed to the observation area 600, because the circularly polarized light or the elliptically polarized light includes a P-polarized component, after being filtered by the sunglasses,
  • the light in the P-polarized state enables a user with sunglasses whose eyes are located in the observation area 600 to still see the image displayed by the display device, thereby improving the user's use experience.
  • the second phase delay part 502 may be disposed at the position of the opening 710 of the package case 700 .
  • FIG. 16 is an exemplary block diagram of a transportation device provided in accordance with another embodiment of the present disclosure.
  • the transportation device includes a heads-up display provided by at least one embodiment of the present disclosure.
  • the traffic device may also be a traffic device including any of the above-mentioned display devices.
  • a front window of a traffic device (eg, a front windshield) is multiplexed as the reflective imaging portion 500 of the head-up display.
  • a traffic device eg, a front windshield
  • the first virtual image 1110 and the second virtual image 1120 shown in FIG. 6a to FIG. 7 , FIG. 9 , FIG. 14 or FIG. 15 are perpendicular to the ground, and the third virtual image 1130 is away from one end of the ground. The distance from the end of the third virtual image 1130 closer to the ground is farther from the observation area 600 , so that each virtual image is matched and fused with the corresponding real scene.
  • the traffic equipment provided by the embodiments of the present disclosure applies the above head-up display, so that the driver can view images at different distances, which is conducive to the matching and fusion of images at different distances and real scenes at different distances, so that the driver does not need images at a fixed distance. Switching back and forth with real scenes at different distances avoids the conflict of visual vergence adjustment and improves the experience of using transportation equipment.
  • the above three virtual images may or may not be displayed simultaneously.
  • one or two virtual images are displayed at the same time period.
  • the transportation equipment may be various suitable vehicles.
  • a front window is provided at the driving position of the transportation equipment and an image is projected on the front window through an in-vehicle display system, it may include various types of automobiles, etc.
  • Transportation equipment or it can be water transportation equipment such as boats.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Instrument Panels (AREA)

Abstract

L'invention concerne un appareil d'affichage d'image multicouche, un affichage tête haute et un dispositif de trafic. L'appareil d'affichage comprend une source d'image (100), un premier élément de réflexion (200) et un second élément de réflexion (300). La source d'image (100) comprend au moins deux régions d'affichage (110), et les au moins deux régions d'affichage (110) comprennent une première région d'affichage (111) et une seconde région d'affichage (112). Le premier élément de réflexion (200) est configuré pour réfléchir la lumière d'image émise par les au moins deux régions d'affichage (110). Le second élément de réflexion (300) est configuré pour réfléchir la lumière d'image qui est propagée vers le second élément de réflexion (300) après avoir été réfléchie par le premier élément de réflexion (200). Le premier élément de réflexion (200) comprend au moins un premier sous-élément de réflexion (210) et un second sous-élément de réflexion (220), de la lumière d'image émise par la première région d'affichage (111) est propagée vers le second élément de réflexion (300) après avoir été réfléchie par le premier sous-élément de réflexion (210), et de la lumière d'image émise par la seconde région d'affichage (112) est propagée vers le second élément de réflexion (300) après avoir été réfléchie par le second sous-élément de réflexion (220). L'appareil d'affichage peut effectuer une imagerie à différentes positions, ce qui permet d'améliorer l'expérience d'utilisation d'un utilisateur.
PCT/CN2021/114139 2020-08-21 2021-08-23 Appareil d'affichage d'image multicouche, affichage tête haute et dispositif de trafic WO2022037703A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010849122.3A CN114077052A (zh) 2020-08-21 2020-08-21 多层图像显示装置、抬头显示器以及交通设备
CN202010849122.3 2020-08-21

Publications (1)

Publication Number Publication Date
WO2022037703A1 true WO2022037703A1 (fr) 2022-02-24

Family

ID=80282318

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/114139 WO2022037703A1 (fr) 2020-08-21 2021-08-23 Appareil d'affichage d'image multicouche, affichage tête haute et dispositif de trafic

Country Status (2)

Country Link
CN (1) CN114077052A (fr)
WO (1) WO2022037703A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023184276A1 (fr) * 2022-03-30 2023-10-05 华为技术有限公司 Procédé d'affichage, système d'affichage et dispositif terminal
CN117850050A (zh) * 2024-03-07 2024-04-09 河南百合特种光学研究院有限公司 一种贴地成像的连续深度增强现实显示方法及装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116125667A (zh) * 2022-12-30 2023-05-16 惠州市德赛西威汽车电子股份有限公司 一种多焦面抬头显示系统

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206421102U (zh) * 2016-12-22 2017-08-18 深圳点石创新科技有限公司 抬头显示装置及装有该抬头显示装置的车辆
CN108663807A (zh) * 2017-03-31 2018-10-16 宁波舜宇车载光学技术有限公司 平视显示光学系统和装置及其成像方法
CN110554497A (zh) * 2018-05-31 2019-12-10 东莞创奕电子科技有限公司 显示装置及其车用抬头显示系统
US20200018977A1 (en) * 2018-07-13 2020-01-16 Conserve & Associates , Inc. Display device and automobile head-up display system using the same
CN210666205U (zh) * 2019-09-02 2020-06-02 未来（北京）黑科技有限公司 一种抬头显示设备、成像系统和车辆
CN211375182U (zh) * 2019-09-02 2020-08-28 未来（北京）黑科技有限公司 一种抬头显示设备、成像系统和车辆
CN213092017U (zh) * 2020-08-21 2021-04-30 未来（北京）黑科技有限公司 多层图像显示装置、抬头显示器以及交通设备
CN113109939A (zh) * 2020-01-10 2021-07-13 未来（北京）黑科技有限公司 一种多层次成像系统
CN113126294A (zh) * 2020-01-10 2021-07-16 未来（北京）黑科技有限公司 一种多层次成像系统
CN213987029U (zh) * 2020-08-21 2021-08-17 未来（北京）黑科技有限公司 双层成像抬头显示装置、抬头显示系统及交通设备
CN113296266A (zh) * 2021-06-07 2021-08-24 合肥疆程技术有限公司 一种显示系统、车载抬头显示器和车辆

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206421102U (zh) * 2016-12-22 2017-08-18 深圳点石创新科技有限公司 抬头显示装置及装有该抬头显示装置的车辆
CN108663807A (zh) * 2017-03-31 2018-10-16 宁波舜宇车载光学技术有限公司 平视显示光学系统和装置及其成像方法
CN110554497A (zh) * 2018-05-31 2019-12-10 东莞创奕电子科技有限公司 显示装置及其车用抬头显示系统
US20200018977A1 (en) * 2018-07-13 2020-01-16 Conserve & Associates , Inc. Display device and automobile head-up display system using the same
CN210666205U (zh) * 2019-09-02 2020-06-02 未来（北京）黑科技有限公司 一种抬头显示设备、成像系统和车辆
CN211375182U (zh) * 2019-09-02 2020-08-28 未来（北京）黑科技有限公司 一种抬头显示设备、成像系统和车辆
CN113109939A (zh) * 2020-01-10 2021-07-13 未来（北京）黑科技有限公司 一种多层次成像系统
CN113126294A (zh) * 2020-01-10 2021-07-16 未来（北京）黑科技有限公司 一种多层次成像系统
CN213092017U (zh) * 2020-08-21 2021-04-30 未来（北京）黑科技有限公司 多层图像显示装置、抬头显示器以及交通设备
CN213987029U (zh) * 2020-08-21 2021-08-17 未来（北京）黑科技有限公司 双层成像抬头显示装置、抬头显示系统及交通设备
CN113296266A (zh) * 2021-06-07 2021-08-24 合肥疆程技术有限公司 一种显示系统、车载抬头显示器和车辆

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023184276A1 (fr) * 2022-03-30 2023-10-05 华为技术有限公司 Procédé d'affichage, système d'affichage et dispositif terminal
CN117850050A (zh) * 2024-03-07 2024-04-09 河南百合特种光学研究院有限公司 一种贴地成像的连续深度增强现实显示方法及装置
CN117850050B (zh) * 2024-03-07 2024-06-04 河南百合特种光学研究院有限公司 一种贴地成像的连续深度增强现实显示方法及装置

Also Published As

Publication number Publication date
CN114077052A (zh) 2022-02-22

Similar Documents

Publication Publication Date Title
WO2022037703A1 (fr) Appareil d'affichage d'image multicouche, affichage tête haute et dispositif de trafic
CN213987029U (zh) 双层成像抬头显示装置、抬头显示系统及交通设备
CN212569297U (zh) 一种抬头显示装置及抬头显示系统
CN213092017U (zh) 多层图像显示装置、抬头显示器以及交通设备
KR20050110614A (ko) 광각 ｐ-편광 반사식 편광기 및 편광된 광원을 구비한헤드-업 디스플레이
CN114077053A (zh) 双层成像抬头显示装置、抬头显示系统及交通设备
JP7355013B2 (ja) 表示装置及びヘッドアップディスプレイ装置
CN213240675U (zh) 一种抬头显示装置及抬头显示系统
JP7195454B2 (ja) 光源装置、それを利用した情報表示システムおよびヘッドアップディスプレイ装置
US20180348523A1 (en) Display apparatus
WO2019077939A1 (fr) Dispositif d'affichage d'image virtuelle
CN213092015U (zh) 图像源、抬头显示器以及交通设备
CN114077057A (zh) 一种抬头显示装置及抬头显示系统
JP7510552B2 (ja) 車両用情報表示システム及び情報表示システム
WO2023123338A1 (fr) Appareil d'affichage, affichage tête haute et équipement de transport
CN218213623U (zh) 显示装置、抬头显示器以及交通设备
CN216748171U (zh) 导光装置、光源装置、显示装置、抬头显示器和交通设备
CN114326108A (zh) 基于像源的防眩光组件、抬头显示装置及机动车
CN116413907A (zh) 显示装置、抬头显示器以及交通设备
CN216748172U (zh) 导光装置、光源装置、抬头显示器和交通设备
CN216927135U (zh) 导光装置、光源装置以及抬头显示器
WO2022022675A1 (fr) Source d'image, affichage tête haute et dispositif de circulation
CN216817084U (zh) 显示系统及包含其的交通工具
CN213338218U (zh) 基于像源的防眩光组件、抬头显示装置及机动车
WO2020233528A1 (fr) Dispositif d'affichage tête haute et véhicule à moteur

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21857790

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21857790

Country of ref document: EP

Kind code of ref document: A1