WO2025112460A1 - 显示装置 - Google Patents

显示装置 Download PDF

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Publication number
WO2025112460A1
WO2025112460A1 PCT/CN2024/099749 CN2024099749W WO2025112460A1 WO 2025112460 A1 WO2025112460 A1 WO 2025112460A1 CN 2024099749 W CN2024099749 W CN 2024099749W WO 2025112460 A1 WO2025112460 A1 WO 2025112460A1
Authority
WO
WIPO (PCT)
Prior art keywords
reflective polarizer
light
light blocking
display device
blocking plate
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/CN2024/099749
Other languages
English (en)
French (fr)
Inventor
张桂洋
叶鑫林
何瑞
查国伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Technology Co Ltd
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 Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Technology Co Ltd
Publication of WO2025112460A1 publication Critical patent/WO2025112460A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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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
    • G02B27/0149—Head-up displays characterised by mechanical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
    • 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
    • G02B27/0149—Head-up displays characterised by mechanical features
    • G02B2027/0154—Head-up displays characterised by mechanical features with movable elements

Definitions

  • the present application relates to the field of vehicle-mounted display technology, and in particular to a display device.
  • HUD Head Up Display
  • in-vehicle displays there are three main solutions for in-vehicle displays: conventional in-vehicle display screens, augmented reality (AR) head-up displays, and in-vehicle head-up displays.
  • AR augmented reality
  • the optical-mechanical structure of AR head-up displays generally uses a combination of hyperbolic mirrors, and the optical module is very complex and expensive.
  • the light efficiency utilization rate of in-vehicle head-up displays is low.
  • the present application provides a display device with a simple structure and capable of improving light efficiency utilization.
  • the present application provides a display device, comprising: a display component, comprising a display screen and a first reflective polarizer, the display screen comprising a light emitting surface, the first reflective polarizer being located on one side of the light emitting surface of the display screen; a retroreflective component, located on one side of the first reflective polarizer; a second reflective polarizer, located on one side of the retroreflective component and the first reflective polarizer; the extension directions of the retroreflective component, the display screen and the second reflective polarizer intersect each other; and a transparent reflective element, located on a side of the second reflective polarizer away from the display screen and the retroreflective component and inclined at a certain angle relative to the second reflective polarizer; wherein the polarization direction of light emitted from the display screen is the same as the polarization direction of the first reflective polarizer and is perpendicular to the polarization direction of the second reflective polarizer, and the polarization direction of light retroreflected by the
  • FIG. 1 is a schematic diagram of a display device provided in some embodiments of the present application.
  • FIG. 2 is a schematic diagram of another display device provided in some other embodiments of the present application.
  • FIG. 3 is a schematic diagram of a light blocking structure in the display device shown in FIG. 2 .
  • FIG. 4 is a schematic diagram of another light blocking structure in the display device shown in FIG. 2 .
  • FIG. 5 is a schematic diagram of another light blocking structure in a display device.
  • the first embodiment of the present application provides a display device 100, which includes a display component, a retroreflective component 30, a second reflective polarizer 40 and a transparent reflective element 50.
  • the display component includes a display screen 10 and a first reflective polarizer 20.
  • the display screen 10 includes a light emitting surface 11.
  • the first reflective polarizer 20 is located on one side of the light emitting surface 11 of the display screen 10.
  • the retroreflective component 30 is located on one side of the first reflective polarizer 20.
  • the second reflective polarizer 40 is located on one side of the retroreflective component 30 and the first reflective polarizer 20.
  • the extension directions of the retroreflective component 30, the display screen 10 and the second reflective polarizer 40 intersect each other.
  • the transparent reflective element 50 is located on a side of the second reflective polarizer 40 away from the display screen 10 and the retroreflective component 30 and is inclined at a certain angle relative to the second reflective polarizer 40.
  • the polarization direction of the light emitted by the display screen 10 is the same as that of the first reflective polarizer 20 and is perpendicular to the polarization direction of the second reflective polarizer 40 .
  • the polarization direction of the light retroreflected by the retroreflective component 30 is the same as that of the second reflective polarizer 40 .
  • the light emitted by the display screen 10 is linearly polarized light (also called parallel polarized light, P light) or circularly polarized light (a type of elliptically polarized light, also called vertically polarized light, S light).
  • linearly polarized light also called parallel polarized light, P light
  • circularly polarized light a type of elliptically polarized light, also called vertically polarized light, S light.
  • the first reflective polarizer 20 and the second reflective polarizer 40 can use any suitable type of reflective polarizer, such as reflective polarizing and brightening film (DBEF), multilayer optical film (MOF) reflective polarizer, diffuse reflection polarizing film (DRPF), wire grid reflective polarizer and cholesteric reflective polarizer.
  • DBEF reflective polarizing and brightening film
  • MOF multilayer optical film
  • DRPF diffuse reflection polarizing film
  • wire grid reflective polarizer cholesteric reflective polarizer.
  • the first reflective polarizer 20 and the second reflective polarizer 40 are reflective polarizing enhancement films (DBEF), for example, DBEF products provided by 3M Company of the United States can be used, which are prepared by multi-layer film technology with different refractive indices.
  • DBEF reflective polarizing enhancement films
  • a diffusion layer or a diffusion sheet can also be set on both sides of the DBEF.
  • the reflective polarizer 20 and the second reflective polarizer 40 may also be a structure formed by stacking a polarizer and a reflective film.
  • the retroreflective component 30 includes a quarter wave plate 31 and a retroreflective film 32 formed on the quarter wave plate 31.
  • the retroreflective film 32 is located on a surface of the quarter wave plate away from the second reflective polarizer 40 and the first reflective polarizer 20.
  • the 1/4 wave plate 31 is used to convert linear polarized light incident thereon into circular polarized light or to convert circular polarized light incident thereon into linear polarized light.
  • the retroreflective film 32 is used to return the incident light incident thereon from the opposite direction close to the incident light.
  • the display device 100 further includes a transparent substrate 41, the second reflective polarizer 40 is located on the transparent substrate 41, and the light emitting surface of the second reflective polarizer 40 is in contact with the transparent substrate 41.
  • the transparent substrate 41 is transparent glass.
  • the angle between the first reflective polarizer 20 and the second reflective polarizer 40 is in the range of 30°-80°.
  • the first reflective polarizer 20 and the second reflective polarizer 40 in this angle range have better light efficiency.
  • the angle between the first reflective polarizer 20 and the second reflective polarizer 40 is 45°.
  • the angle between the first reflective polarizer 20 and the second reflective polarizer 40 is 45°, the light efficiency of the display device 100 is the highest.
  • the display device 100 is a vehicle-mounted display device
  • the transparent reflective element 50 is a vehicle-mounted transparent glass.
  • the display device 100 further includes a housing (not shown), and the display screen 10, the first reflective polarizer 20, the retroreflective component 30, the second reflective polarizer 40 and the transparent reflective element 50 are all located in the housing.
  • the angle between the transparent reflective element 50 and the second reflective polarizer 40 is an acute angle or an obtuse angle.
  • the angle between the transparent reflective element 50 and the second reflective polarizer 40 is an acute angle
  • the orthographic projection of the transparent reflective element 50 on the transparent substrate 41 covers at least a portion of the second reflective polarizer 40.
  • the angle between the transparent reflective element 50 and the second reflective polarizer 40 can be changed by adjusting the position of the transparent reflective element 50, thereby achieving that the virtual image formed by the head-up display outside the vehicle and the real image formed by the head-up display inside the vehicle do not interfere with each other, which is convenient for the driver to view the information displayed on the display screen 10.
  • light emitted from the first reflective polarizer 20 and incident on the surface of the second reflective polarizer 40 passes through the second reflective polarizer 40 after passing through the retroreflective component 30 and forms a real image on the light-emitting side of the second reflective polarizer 40, and the real image is mirror-symmetrical to the image displayed on the display screen 10;
  • light emitted from the first reflective polarizer 20 and incident on the retroreflective component 30 is retroreflected to the surface of the first reflective polarizer 20 and reflected on the surface of the first reflective polarizer 20 to form a reflected light beam, and the reflected light beam passes through the second reflective polarizer 40 and is emitted on the transparent reflective element 50 and forms a virtual image on the side of the transparent reflective element 50 away from the second reflective polarizer 40, and the virtual image is mirror-symmetrical to the image displayed on the light-emitting surface of the second reflective polarizer 40.
  • the polarization direction of the light emitted by the display screen 10 is the same as that of the first reflective polarizer 20, the light emitted by the display screen 10 passes through the first reflective polarizer 20. Since the polarization direction of the light emitted by the display screen 10 is perpendicular to that of the second reflective polarizer 40, the light L1 emitted from the first reflective polarizer 20 and directly incident on the surface of the second reflective polarizer 40 cannot pass through the second reflective polarizer 40.
  • the polarization direction of the light is changed, and the polarization direction of the formed retroreflected light is the same as that of the second reflective polarizer 40, and can pass through the second reflective polarizer 40.
  • the polarization direction of the light directly incident from the first reflective polarizer 20 to the retroreflective component 30 is changed after passing through the 1/4 wave plate 31 and the retroreflective film 32.
  • the polarization direction of the retroreflected light formed is perpendicular to the polarization direction of the first reflective polarizer 20 and is the same as the polarization direction of the second reflective polarizer 40.
  • the retroreflected light beam formed after the light directly incident from the first reflective polarizer 20 to the retroreflective component 30 will be reflected on the surface of the first reflective polarizer 20, and the reflected light beam formed thereby can pass through the second reflective polarizer 40.
  • the light L1 emitted from the first reflective polarizer 20 and directly incident on the surface of the second reflective polarizer 40 is reflected on the surface of the second reflective polarizer 40 to form a first reflected light L2, which is reflected into the retroreflective component 30 and forms a first retroreflective light L3. Since the polarization direction of the first retroreflective light L3 is the same as the polarization direction of the second reflective polarizer 40, the first retroreflective light L3 passes through the second reflective polarizer 40 and forms a first outgoing light L4, which forms a first image 60 on the light-emitting side of the second reflective polarizer 40, and the first image 60 is a real image.
  • the display screen 10, the first reflective polarizer 20, the retroreflective component 30, and the second reflective polarizer 40 realize an in-vehicle head-up display.
  • the light L5 emitted from the first reflective polarizer 20 and directly incident into the retroreflective assembly 30 is retroreflected in the retroreflective assembly 30 and forms a second retroreflective light L6, the second retroreflective light L6 is emitted on the surface of the first reflective polarizer 20 and forms a second reflective light L7, the polarization direction of the second reflective light L7 is the same as the polarization direction of the second reflective polarizer 40, the second reflective light L7 passes through the second reflective polarizer 40 and forms a second outgoing light L8, the second outgoing light L8 is incident on the transparent reflective element 50 and forms a third reflective light L9, the third reflective light L9 forms a second image 70 on the side of the transparent reflective element 50 away from the second reflective polarizer 40, and the second image 70 is a virtual image.
  • the display screen 10, the first reflective polarizer 20, the retroreflective assembly 30, and the second reflective polarizer 40 realize an exterior head-up display.
  • the first reflective polarizer 20 transmits the P light and reflects the S light
  • the second reflective polarizer 40 transmits the S light and reflects the P light
  • the light path of in-vehicle imaging is: the P light emitted by the display screen 10 is reflected by the second reflective polarizer 40 and then passes through the 1/4 wave plate 31 to form left-handed circularly polarized light, and then passes through the retroreflective film 32 and the 1/4 wave plate 31 to form S polarized light.
  • the S polarized light passes through the second reflective polarizer 40 to form a real image in the vehicle.
  • the light path of the outside-vehicle imaging is: the P light emitted by the display screen 10 passes through the 1/4 wave plate 31 above the retroreflective film 32 to form left-handed circularly polarized light, and then passes through the retroreflective film 32 and the 1/4 wave plate 31 to form S polarized light. After the S polarized light is reflected on the surface of the display screen 10, it passes through the second reflective polarizer 40 and then reflects through the transparent reflective element 50 (for example: the vehicle windshield) to form a virtual image outside the vehicle.
  • the transparent reflective element 50 for example: the vehicle windshield
  • the first reflective polarizer 20 transmits the S light and reflects the P light
  • the second reflective polarizer 40 transmits the P light and reflects the S light
  • the light path of in-vehicle imaging is: the S light emitted by the display screen 10 is reflected by the second reflective polarizer 40 and then passes through the 1/4 wave plate 31 to form right-handed circularly polarized light, and then passes through the retroreflective film 32 and the 1/4 wave plate 31 to form P polarized light.
  • the P polarized light passes through the second reflective polarizer 40 to form a real image in the vehicle.
  • the light path of the outside-vehicle imaging is: the S light emitted by the display screen 10 passes through the 1/4 wave plate 31 above the retroreflective film 32 to form right-handed circularly polarized light, and then passes through the retroreflective film 32 and the 1/4 wave plate 31 to form P polarized light.
  • the P polarized light is reflected on the surface of the display screen 10, passes through the second reflective polarizer 40, and then reflects through the transparent reflective element 50 (for example: the vehicle windshield), forming a virtual image (second image) outside the vehicle.
  • the polarized glasses worn by the driver transmit P light.
  • the real image and virtual image formed by the display device 100 provided in the present application are in different positions (non-overlapping), which can avoid overlapping interference between the real image and the virtual image, and can simultaneously support the in-vehicle head-up display (forming a real image) and the out-of-vehicle AR head-up display (forming a virtual image).
  • the in-vehicle head-up display forms a real image without passing through a transparent reflective element (for example: windshield), and the out-of-vehicle AR head-up display can also use the part of the light that is not directly irradiated on the second reflective polarizer, thereby improving the utilization rate of the light emitted by the display screen of the display device.
  • the first reflective polarizer 20 replaces the position of the ordinary polarizer on the surface of the existing display screen, that is, the present application replaces the ordinary polarizer on the surface of the existing display screen with a reflective polarizer.
  • the part of the light reflected by the retroreflective component 30 to the first reflective polarizer 20 can be further utilized to improve the utilization rate of the light.
  • the light efficiency utilization rate of the display device 100 is greater than or equal to 40%; the light utilization rate of the display device 100 is increased from 20% to 40%.
  • the present application only adds the first reflective polarizer 20, which can realize the in-vehicle head-up display and the out-of-vehicle AR head-up display at the same time, and the structure is simple, which is conducive to mass production.
  • the present application also provides another display device 200, the structure of which is substantially the same as that of the display device 100, except that the display device 200 further includes a light-blocking structure 80 located on the light-exiting side of the second reflective polarizer 40.
  • the light-blocking structure 80 has a first state and a second state.
  • the light-blocking structure 80 has a light-blocking function and is tilted relative to the second reflective polarizer 40, and the orthographic projection of the light-blocking structure 80 on the plane where the second reflective polarizer 40 is located at least partially falls on the second reflective polarizer 40; in the second state, the light-blocking structure 80 has no light-blocking function and is located outside the light-exiting surface of the second reflective polarizer 40.
  • the light efficiency of the head-up display in the car can reach 40%, while the light efficiency of the AR head-up display outside the car is reduced by about 10% due to the reflection efficiency of the windshield. Therefore, the brightness of the AR head-up display outside the car is relatively low.
  • the head-up display in the car (real image) is suitable for use when the ambient light is relatively bright (for example: during the day), while the AR head-up display outside the car (virtual image) is suitable for use when the ambient light is relatively dark (for example: at night).
  • the display device 200 can choose whether to use the head-up display in the car or the AR head-up display outside the car according to the brightness of the ambient light, and then by adjusting the position and state of the light blocking structure 80, it is conducive to switching between the virtual image (head-up display outside the car) and the real image (head-up display in the car).
  • the light blocking structure 80 is used to block the light emitted from the second reflective polarizer 40 and incident on the transparent reflective element 50; when the AR head-up display outside the car is used, the light blocking structure 80 is used to block the light emitted from the second reflective polarizer 40 and used to form a real image.
  • the light shielding structure 80 includes a light shielding plate 81 and a reel 82.
  • the light shielding plate 81 is flexible. One end of the light shielding plate 81 is connected to the reel 82.
  • the reel 82 can be fixed or detachably fixed to the housing. Under the action of external force, the light shielding plate 81 can be wound around the reel 82 or unfolded.
  • the light shielding structure 80 uses the light shielding plate 81 in combination with the reel 82, which can not only realize the switching between the virtual image (head-up display outside the vehicle) and the real image (head-up display inside the vehicle), but also reduce the floor space occupied by the light shielding structure 80.
  • the light blocking structure 80 includes a light blocking plate 81 and a push-pull member 83.
  • One end of the light blocking plate 81 is fixed or detachably fixed to the housing.
  • the push-pull member 83 is fixed to one end of the light blocking plate 81.
  • the light blocking plate 81 is elastic. Under the action of an external force on the push-pull member 83, the push-pull member 83 can drive the light blocking plate 81 to be expanded or not to be expanded.
  • a fixing member having one end of the push-pull member 83 that fixes the light blocking plate 81, so that the light blocking plate 81 remains in the expanded state.
  • the light blocking structure 80 adopts the elastic light blocking plate 81 in combination with the push-pull member 83, which can not only realize the switching between the virtual image (head-up display outside the vehicle) and the real image (head-up display inside the vehicle), reduce the footprint of the light blocking structure 80, but also provide power for the expansion or retraction of the light blocking structure 80.
  • the light blocking structure 80 includes a light blocking plate 81 and a rotating shaft 84.
  • the rotating shaft 84 is fixed or detachably fixed to the housing.
  • One end of the light blocking plate 81 is sleeved on the rotating shaft 84. Under the action of external force, the light blocking plate 81 can rotate on the rotating shaft 84.
  • the light blocking structure 80 provided in this embodiment uses the light blocking plate 81 in combination with the rotating shaft 84. When the light blocking plate 81 is needed to block light, the light blocking plate 81 is rotated to a specified position. When the light blocking plate 81 is not needed to block light, the light blocking plate 81 is rotated back to the original position. The operation is simple and the footprint is small.
  • the light shield 81 is made of a black light-absorbing material and an electrochromic material.
  • the electrochromic material is black (opaque) when powered on, and transparent (transmissive) when not powered on.
  • the light blocking structure 80 is a polarizer whose polarization direction is perpendicular to that of the second reflective polarizer; further, the light blocking plate 81 is a polarizer whose polarization direction is perpendicular to that of the second reflective polarizer.
  • the light blocking structure 80 includes a first light blocking plate 801 and a second light blocking plate 802.
  • the first light blocking plate 801 and the second light blocking plate 802 are located at one side of the light emitting surface of the second reflective polarizer 40 and are respectively inclined relative to the second reflective polarizer 40.
  • the extension directions of the first light blocking plate 801, the second light blocking plate 802 and the second reflective polarizer 40 intersect each other.
  • the first light blocking plate 801 and the retroreflective component 30 are located at the same end of the second reflective polarizer 40
  • the second light blocking plate 802 and the display screen 10 are located at the same end of the second reflective polarizer 40.
  • the structures of the first light blocking plate 801 and the second light blocking plate 802 can both apply the structure of the light blocking plate 81.
  • the light blocking structure 80 may also include only one light blocking plate 81, and the position of the light blocking plate 81 is variable. That is, when only the head-up display in the vehicle is required, the position of the light blocking plate 81 is located at one end of the second reflective polarizer 40 close to the transparent reflective element 50, and is used to block the light projected from the second reflective polarizer 40 to the transparent reflective element 50, so as to prevent the formation of a virtual image on the side of the transparent reflective element 50 away from the second reflective polarizer 40.
  • the position of the light blocking plate 81 is located at one end of the second reflective polarizer 40 away from the transparent reflective element 50, and is used to block the light emitted from the second reflective polarizer 40 for forming a real image, so as to prevent the formation of a real image on the light-emitting side of the second reflective polarizer 40.
  • the display device 200 further includes an ambient light brightness detection element 90, which is connected to the display screen 10; the ambient light brightness detection element 90 is configured to detect the brightness of the ambient light and determine whether one of the first light baffle 801 and the second light baffle 802 should be selected to be in the first state according to the brightness of the ambient light, and the judgment result is displayed on the display screen; wherein, the ambient light brightness detection element 90 is configured to detect the brightness of the ambient light and automatically adjust the opening and closing of the first light baffle 801 and the second light baffle 802 according to the brightness of the ambient light, so as to realize the intelligent selection of the in-vehicle head-up display and the out-vehicle AR head-up display.
  • the ambient light brightness detection element 90 is configured to detect the brightness of the ambient light and determine whether one of the first light baffle 801 and the second light baffle 802 should be selected to be in the first state according to the brightness of the ambient light, and the judgment result is displayed on the display screen; wherein, the ambient light brightness detection element 90 is configured
  • a brightness threshold can be set, and when the brightness of the external ambient light is lower than the brightness threshold, the out-vehicle AR head-up display is used, and when the brightness of the external ambient light is higher than or equal to the brightness threshold, the in-vehicle head-up display is used.

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  • General Physics & Mathematics (AREA)
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Abstract

一种显示装置（100），包括显示组件、逆反射组件（30）、第二反射偏振片（40）及透明反射元件（50），显示组件包括显示屏（10）及第一反射偏振片（20），显示屏（10）包括出光面（11），第一反射偏振片（20）位于显示屏（10）的出光面（11）一侧，逆反射组件（30）位于第一反射偏振片（20）的一侧，第二反射偏振片（40）位于逆反射组件（30）及第一反射偏振片（20）的一侧，逆反射组件（30）、显示屏（10）及第二反射偏振片（40）的延伸方向两两相交，透明反射元件（50）位于第二反射偏振片（40）远离显示屏（10）及逆反射组件（30）的一侧且相对于第二反射偏振片（40）倾斜一定角度。显示屏（10）发出的光的偏振方向与第一反射偏振片（20）的偏振方向相同，且与第二反射偏振片（40）的偏振方向垂直，被逆反射组件（30）逆反射的光的偏振方向与第二反射偏振片（40）的偏振方向相同。

Description

显示装置
本申请要求于2023年11月30日提交中国专利局、申请号为202311647111.7的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及车载显示技术领域，尤其涉及一种显示装置。
 背景技术
车载显示技术随着显示技术的进步不断迭代，目前车载显示屏配置种类繁多，如双连屏、三联屏、异形屏、柔性屏等。随着生活水平的提升，消费者对安全驾驶的需求不断增强。抬头显示(Head Up Display，HUD)技术可以将驾驶速度、路线导航等信息显示在车辆前方，这就保证驾驶员在行驶过程中不需要低头查看仪表，从而保证了行驶的安全。
当前车载显示主要有三种方案：常规车内显示屏显示、增强现实(Augmented Reality，AR)抬头显示及车内抬头显示。AR抬头显示光机结构一般采用双曲面镜组合，光学模组非常复杂，成本较高。车内抬头显示的光效利用率较低。
 发明概述
有鉴于此，本申请提供一种结构简单且能够提高光效利用率的显示装置。
为解决上述问题，本申请提供的技术方案如下：
第一方面，本申请提供一种显示装置，包括：显示组件，包括显示屏及第一反射偏光片，所述显示屏包括出光面，所述第一反射偏振片位于所述显示屏的所述出光面一侧；逆反射组件，位于所述第一反射偏振片的一侧；第二反射偏振片，位于所述逆反射组件及所述第一反射偏振片的一侧；所述逆反射组件、所述显示屏及所述第二反射偏振片的延伸方向两两相交；及透明反射元件，位于所述第二反射偏振片远离所述显示屏及所述逆反射组件的一侧且相对于所述第二反射偏振片倾斜一定角度；其中，所述显示屏发出的光的偏振方向与所述第一反射偏振片的偏振方向相同，且与所述第二反射偏振片的偏振方向垂直，被所述逆反射组件逆反射的光的偏振方向与所述第二反射偏振片的偏振方向相同。
 附图说明
图1为本申请一些实施例提供的一种显示装置的示意图。
图2为本申请另一些实施例提供的另一种显示装置的示意图。
图3为图2所示的显示装置中的一种挡光结构的示意图。
图4为图2所示的显示装置中的另一种挡光结构的示意图。
图5所示的显示装置中的再一种挡光结构的示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，需要理解的是，术语“上”、“下”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体地限定。
本申请可以在不同实施中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。
以下将结合具体实施例及附图对本申请提供的显示装置进行详细描述。
请参阅图1，本申请第一实施例提供一种显示装置100，所述显示装置100包括显示组件、逆反射组件30、第二反射偏振片40及透明反射元件50，所述显示组件包括显示屏10及第一反射偏振片20，所述显示屏10包括出光面11，所述第一反射偏振片20位于所述显示屏10的所述出光面11一侧，所述逆反射组件30位于所述第一反射偏振片20的一侧，所述第二反射偏振片40位于所述逆反射组件30及所述第一反射偏振片20的一侧，所述逆反射组件30、所述显示屏10及所述第二反射偏振片40的延伸方向两两相交，所述透明反射元件50位于所述第二反射偏振片40远离所述显示屏10及所述逆反射组件30的一侧且相对于所述第二反射偏振片40倾斜一定角度。其中，所述显示屏10发出的光的偏振方向与所述第一反射偏振片20的偏振方向相同，且与所述第二反射偏振片40的偏振方向垂直，被所述逆反射组件30逆反射的光的偏振方向与所述第二反射偏振片40的偏振方向相同。
在一些实施例中，所述显示屏10发出的光为线偏光(又称平行偏振光，P光)或圆偏光(是椭圆偏振光的一种，又称垂直偏振光，S光)。
其中，所述第一反射偏振片20及所述第二反射偏振片40可以使用任何合适类型的反射偏振片，例如反射式偏光增光膜(Reflective polarizing and brightening film，DBEF)、多层光学膜(Multilayer optical film，MOF)反射偏振片、漫反射型偏振膜(Diffuse reflection polarizing film，DRPF)、线栅反射偏振片及胆甾型反射偏振片等中一种。
在一些实施例中，所述第一反射偏振片20及所述第二反射偏振片40为反射式偏光增光膜(DBEF)，例如可以采用美国3M公司提供的DBEF产品，其采用具有不同折射率的多层膜技术制备。在DBEF的两侧还可以设置扩散层或扩散片等。
在一些实施例中，所述反射偏振片20及所述第二反射偏振片40还可以是偏振片和反射膜堆叠构成的结构。
在一些实施例中，所述逆反射组件30包括1/4波片31及形成在所述1/4波片31上的逆反射膜32。所述逆反射膜32位于所述1/4波片远离所述第二反射偏振片40及所述第一反射偏振片20的表面上。
其中，所述1/4波片31用于将入射至其上的线偏振光转换为圆偏振光或将入射至其上的圆偏振光转换为线偏振光。所述逆反射膜32用于将入射至其上的入射光线从接近入射光线的反方向返回。
在一些实施例中，所述显示装置100还包括透明基板41，所述第二反射偏振片40位于所述透明基板41上，且所述第二反射偏振片40的出光面与所述透明基板41接触。在一些实施例中，所述透明基板41为透明玻璃。
在一些实施例中，所述第一反射偏光片20与所述第二反射偏光片40之间的夹角范围为30°-80°。具有此角度范围内的所述第一反射偏光片20与所述第二反射偏光片40，具有较好的光效率。
在本实施例中，所述第一反射偏光片20与所述第二反射偏光片40之间的夹角范围为45°。当所述第一反射偏光片20与所述第二反射偏光片40之间的夹角范围为45°时，所述显示装置100的光效率最高。
在一些实施例中，所述显示装置100为车载显示装置，所述透明反射元件50为车载透明玻璃。
在一些实施例中，所述显示装置100还包括壳体(图未示)，所述显示屏10、所述第一反射偏振片20、所述逆反射组件30、所述第二反射偏振片40及所述透明反射元件50均位于所述壳体内。
其中，所述透明反射元件50与所述第二反射偏振片40之间的夹角为锐角或钝角。在本实施例中，所述透明反射元件50与所述第二反射偏振片40之间的夹角为锐角，所述透明反射元件50在所述透明基板41上的正投影覆盖至少部分所述第二反射偏振片40。当然，当所述显示装置100为车载显示装置时，所述透明反射元件50为车载玻璃，所述透明反射元件50的位置不变的，可以通过调节所述透明反射元件50的位置来改变所述透明反射元件50与所述第二反射偏振片40之间的夹角的大小，进而实现车外抬头显示形成的虚像和车内抬头显示形成的实像相互不干扰，便于驾驶员观看显示屏10上显示的信息。
在一些实施例中，自所述第一反射偏振片20出射且入射到所述第二反射偏振片40表面的光在经过所述逆反射组件30后透过所述第二反射偏振片40并在所述第二反射偏振片40的出光侧形成实像，所述实像与所述显示屏10上显示的图像呈镜像对称；自所述第一反射偏振片20出射且入射到所述逆反射组件30上的光逆反射至所述第一反射偏振片20表面并在所述第一反射偏振片20表面反射，形成反射光束，所述反射光束透过所述第二反射偏振片40并在所述透明反射元件50上发射且在所述透明反射元件50远离所述第二反射偏振片40的一侧形成虚像，所述虚像与所述第二反射偏振片40的出光面上显示的图像呈镜像对称。
由于所述显示屏10发出的光的偏振方向与所述第一反射偏振片20的偏振方向相同，所述显示屏10发出的光透过所述第一反射偏振片20。由于所述显示屏10发出的光的偏振方向与所述第二反射偏振片40的偏振方向垂直，则自所述第一反射偏振片20发出且直接入射至所述第二反射偏振片40表面的光L1并不能透过所述第二反射偏振片40。被所述第二反射偏振片40反射至所述逆反射组件30的光经过所述1/4波片31和所述逆反射膜32的作用后，偏振方向被改变，形成的逆反射光的偏振方向与所述第二反射偏振片40的偏振方向相同，能够透过所述第二反射偏振片40。直接自所述第一反射偏振片20入射至所述逆反射组件30的光经过所述1/4波片31和所述逆反射膜32的作用后，偏振方向被改变，形成的逆反射光的偏振方向与所述第一反射偏振片20的偏振方向垂直且与所述第二反射偏振片40的偏振方向相同，因此，直接自所述第一反射偏振片20入射至所述逆反射组件30的光后形成的逆反射光束会在所述第一反射偏振片20表面发生反射，由此形成的反射光束能够透过所述第二反射偏振片40。
具体地，自所述第一反射偏振片20发出且直接入射至所述第二反射偏振片40表面的光L1在所述第二反射偏振片40的表面发生反射，形成第一反射光线L2，所述第一反射光线L2被反射至所述逆反射组件30内并形成第一逆反射光线L3。由于所述第一逆反射光线L3的偏振方向与所述第二反射偏振片40的偏振方向相同，因此，所述第一逆反射光线L3透过所述第二反射偏振片40并形成第一出射光线L4，所述第一出射光线L4在所述第二反射偏振片40的出光侧形成第一图像60，所述第一图像60为实像。所述显示屏10、所述第一反射偏振片20、所述逆反射组件30、所述第二反射偏振片40实现了车内抬头显示。
自所述第一反射偏振片20发出且直接入射至所述逆反射组件30内的光L5在所述逆反射组件30内发生逆反射并形成第二逆反射光线L6，所述第二逆反射光线L6在所述第一反射偏振片20的表面发生发射并形成第二反射光线L7，所述第二反射光线L7的偏振方向与所述第二反射偏振片40的偏振方向相同，所述第二反射光线L7透过所述第二反射偏振片40并形成第二出射光线L8，所述第二出射光线L8入射至所述透明反射元件50上并形成第三反射光线L9，所述第三反射光线L9在所述透明反射元件50的远离所述第二反射偏振片40一侧形成第二图像70，所述第二图像70为虚像。所述显示屏10、所述第一反射偏振片20、所述逆反射组件30、所述第二反射偏振片40实现了车外抬头显示。
在一些实施例中，当所述显示屏10发射的光为P光，则所述第一反射偏振片20透过P光且反射S光，所述第二反射偏振片40透过S光且反射P光。
在该实施例中，车内成像(车内抬头显示)的光线路径是：所述显示屏10发射的P光经过所述第二反射偏振片40反射后再通过1/4波片31形成左旋圆偏振光，再通过所述逆反射膜32和所述1/4波片31后形成S偏振光，S偏振光透过所述第二反射偏振片40，在车内形成实像。
在该实施例中，车外成像(车外抬头显示)的光线路径是：所述显示屏10发射的P光通过所述逆反射膜32上方的所述1/4波片31形成左旋圆偏振光，再通过所述逆反射膜32和所述1/4波片31后形成S偏振光，S偏振光在所述显示屏10表面反射后透过所述第二反射偏振片40后再经过所述透明反射元件50(例如：车载挡风玻璃)反射，在车外形成虚像。
在一些实施例中，当所述显示屏10发射的光为S光，则所述第一反射偏振片20透过S光且反射P光，所述第二反射偏振片40透过P光且反射S光。
在该实施例中，车内成像(车内抬头显示)的光线路径是：所述显示屏10发射的S光经过所述第二反射偏振片40反射后再通过1/4波片31形成右旋圆偏振光，再通过所述逆反射膜32和所述1/4波片31后形成P偏振光，P偏振光透过所述第二反射偏振片40，在车内形成实像。
在该实施例中，车外成像(车外抬头显示)的光线路径是：所述显示屏10发射的S光通过所述逆反射膜32上方的所述1/4波片31形成右旋圆偏振光，再通过所述逆反射膜32和所述1/4波片31后形成P偏振光，P偏振光在所述显示屏10表面反射后透过所述第二反射偏振片40后再经过所述透明反射元件50(例如：车载挡风玻璃)反射，在车外形成虚像(第二图像)。
一般地，为了防止眩光影响，驾驶员佩戴的偏振眼镜透射P光。
综上所述，本申请提供的显示装置100形成的实像和虚像位置不同(不重叠)，可以避免实像和虚像交叠干扰，可以同时支持车内抬头显示(形成实像)和车外AR抬头显示(形成虚像)，车内抬头显示形成实像不需要经过透明反射元件(例如：挡风玻璃)，车外AR抬头显示还可以利用没有直接照射到所述第二反射偏振片上的那部分光线，从而可以提高所述显示装置的显示屏发出的光线的利用率。
在一些实施例中，所述第一反射偏振片20替代了现有的显示屏表面的普通偏振片的位置，也即，本申请将现有显示屏表面具有的普通偏振片替换成了反射偏振片，在满足原有的偏振需求的基础上还能够进一步利用被逆反射组件30逆反射至所述第一反射偏振片20上的这部分光线，能够提高光线的利用率。在一些实施例中，所述显示装置100的光效利用率大于或等于40%；所述显示装置100的光线利用率由20%被提升至40%。本申请仅仅添加了所述第一反射偏振片20，就可以同时实现车内抬头显示和车外AR抬头显示，结构简单，有利于实现量产。
请参阅图2至图5，本申请还提供另一种显示装置200，所述显示装置200的结构与所述显示装置100的结构基本相同，其区别仅在于：所述显示装置200还包括位于所述第二反射偏振片40的出光侧的挡光结构80。所述挡光结构80具有第一状态和第二状态，在所述第一状态下，所述挡光结构80具有挡光作用且相对于所述第二反射偏振片40倾斜，所述挡光结构80在所述第二反射偏振片40所在的平面上的正投影至少部分落在所述第二反射偏振片40上；在所述第二状态下，所述挡光结构80不具有挡光作用且位于所述第二反射偏振片40的出光面外。
一般车内抬头显示的光效率能达到40%，而车外AR抬头显示的光效率由于挡风玻璃的反射效率降低10%左右。因此车外AR抬头显示的亮度较低，在不考虑增大显示屏10功耗的前提下，车内抬头显示(实像)适合环境光比较亮(例如：白天)时使用，而车外AR抬头显示(虚像)适合环境光比较暗(例如：黑夜)时使用。因此，所述显示装置200借助于所述挡光结构80，可以根据环境光的亮度选择是使用车内抬头显示还是车外AR抬头显示，进而通过调节所述挡光结构80的位置和状态，有利于实现虚像(车外抬头显示)和实像(车内抬头显示)之间的切换。具体地，当使用车内抬头显示时，使用所述挡光结构80挡住自所述第二反射偏振片40射出且入射至所述透明反射元件50上的光；当使用车外AR抬头显示时，使用所述挡光结构80挡住自所述第二反射偏振片40射出且用于形成实像的光。
请参阅图3，在一些实施例中，所述挡光结构80包括挡光板81及卷轴82，所述挡光板81具有柔性，所述挡光板81的一端连接在所述卷轴82上，所述卷轴82可以固定或可拆卸固定在所述壳体上。在外力作用下，所述挡光板81能够卷绕在所述卷轴82上或展开。其中，所述挡光结构80采用所述挡光板81搭配所述卷轴82，不仅可以实现虚像(车外抬头显示)和实像(车内抬头显示)之间的切换，还可以减少所述挡光结构80的占地面积。
请参阅图4，在一些实施例中，所述挡光结构80包括挡光板81及推拉件83，所述挡光板81的一端固定或可拆卸固定在所述壳体上，所述推拉件83固定在所述挡光板81的一端；所述挡光板81具有弹性，在作用在所述推拉件83上的外力作用下，所述推拉件83能够带动所述挡光板81展开或不展开。当然，这样的设计，还需要设计一个固定所述挡光板81的具有推拉件83的一端的固定件，以使得所述挡光板81保持在展开状态。当将所述挡光板81的具有推拉件83的一端的固定解除时，所述挡光板81在自身弹力作用下回复原状。其中，所述挡光结构80采用具有弹性的所述挡光板81搭配所述推拉件83，不仅可以实现虚像(车外抬头显示)和实像(车内抬头显示)之间的切换，减少所述挡光结构80的占地面积，还可以给所述挡光结构80的展开或回缩提供动力。
请参阅图5，在一些实施例中，所述挡光结构80包括挡光板81及转轴84，所述转轴84固定或可拆卸固定在所述壳体上，所述挡光板81的一端套设在所述转轴84上；在外力作用下，所述挡光板81能够在所述转轴84上旋转。本实施例提供的所述挡光结构80采用所述挡光板81搭配所述转轴84，当需要使用所述挡光板81进行挡光时，将所述挡光板81转动至指定位置处，当不需要使用所述挡光板81进行挡光时，将所述挡光板81转动回原位置。操作简单，且占地面积小。
在一些实施例中，所述挡光板81的材质为黑色吸光材料及电致变色材料中的一种。所述电致变色材料在通电的情况下为黑色(不透光)，在不通电的情况下为透明色(透光)。
在一些实施例中，所述挡光结构80为偏振方向与所述第二反射偏振片的偏振方向垂直的偏振片；进一步地，所述挡光板81为偏振方向与所述第二反射偏振片的偏振方向垂直的偏振片。
请继续参阅图2，在一些实施例中，所述挡光结构80包括第一挡光板801及第二挡光板802，所述第一挡光板801及所述第二挡光板802位于所述第二反射偏振片40的出光面一侧且分别相对于所述第二反射偏振片40倾斜，所述第一挡光板801、所述第二挡光板802及所述第二反射偏振片40的延伸方向两两相交。具体地，所述第一挡光板801及所述逆反射组件30位于所述第二反射偏振片40的同一端，所述第二挡光板802及所述显示屏10位于所述第二反射偏振片40的同一端。具体地，所述第一挡光板801及所述第二挡光板802的结构均可应用前述挡光板81的结构。
在一些实施例中，所述挡光结构80还可以只包括一个所述挡光板81，所述挡光板81的位置可变。也即，当只需要车内抬头显示时，所述挡光板81的位置位于所述第二反射偏振片40的靠近所述透明反射元件50的一端，用于遮挡自所述第二反射偏振片40投射至所述透明反射元件50上的光，以阻止在所述透明反射元件50的远离所述第二反射偏振片40的一侧形成虚像。当只需要车外抬头显示时，所述挡光板81的位置位于所述第二反射偏振片40的远离所述透明反射元件50的一端，用于遮挡自所述第二反射偏振片40射出的用于形成实像的光，以阻止在所述第二反射偏振片40的出光侧形成实像。
在一些实施例中，所述显示装置200还包括环境光亮度检测元件90，与所述显示屏10连接；所述环境光亮度检测元件90被配置为检测环境光的亮度并根据环境光的亮度判断应该选取所述第一挡光板801和所述第二挡光板802中的一个处于所述第一状态，并将判断结果在所述显示屏中显示；其中，所述环境光亮度检测元件90被配置为检测环境光的亮度并根据环境光的亮度自动调节所述第一挡光板801和所述第二挡光板802的开和关，以实现车内抬头显示和车外AR抬头显示的智能选择。具体地，可以设定一个亮度阈值，当外界环境光的亮度低于所述亮度阈值时，采用车外AR抬头显示，当外界环境光的亮度高于或等于所述亮度阈值时，采用车内抬头显示。
综上所述，虽然本申请已以优选实施例揭露如上，但上述优选实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种显示装置，其包括：
    显示组件，包括显示屏及第一反射偏光片，所述显示屏包括出光面，所述第一反射偏振片位于所述显示屏的所述出光面一侧；
    逆反射组件，位于所述第一反射偏振片的一侧；
    第二反射偏振片，位于所述逆反射组件及所述第一反射偏振片的一侧；所述逆反射组件、所述显示屏及所述第二反射偏振片的延伸方向两两相交；及
    透明反射元件，位于所述第二反射偏振片远离所述显示屏及所述逆反射组件的一侧且相对于所述第二反射偏振片倾斜一定角度；
    其中，所述显示屏发出的光的偏振方向与所述第一反射偏振片的偏振方向相同，且与所述第二反射偏振片的偏振方向垂直，被所述逆反射组件逆反射的光的偏振方向与所述第二反射偏振片的偏振方向相同。
  2. 如权利要求1所述的显示装置，其中，所述显示装置还包括位于所述第二反射偏振片的出光侧的挡光结构，所述挡光结构具有第一状态和第二状态；
    在所述第一状态下，所述挡光结构具有挡光作用且相对于所述第二反射偏振片倾斜，所述挡光结构在所述第二反射偏振片所在的平面上的正投影至少部分落在所述第二反射偏振片上；
    在所述第二状态下，所述挡光结构不具有挡光作用且位于所述第二反射偏振片的出光面外。
  3. 如权利要求2所述的显示装置，其中，所述挡光结构包括挡光板及卷轴，所述挡光板具有柔性，所述挡光板的一端连接在所述卷轴上，在外力作用下，所述挡光板能够卷绕在所述卷轴上或展开。
  4. 如权利要求2所述的显示装置，其中，所述挡光结构包括挡光板及推拉件，所述挡光板的一端固定，所述推拉件固定在所述挡光板的一端；所述挡光板具有弹性，在作用在所述推拉件上的外力作用下，所述推拉件能够带动所述挡光板展开或不展开。
  5. 如权利要求2所述的显示装置，其中，所述挡光结构包括挡光板及转轴，所述转轴固定，所述挡光板的一端套设在所述转轴上；
    在外力作用下，所述挡光板能够在所述转轴上旋转。
  6. 如权利要求2至5任一项所述的显示装置，其中，所述挡光结构包括第一挡光板及第二挡光板，所述第一挡光板及所述第二挡光板位于所述第二反射偏振片的出光面一侧且分别相对于所述第二反射偏振片倾斜，所述第一挡光板、所述第二挡光板及所述第二反射偏振片的延伸方向两两相交。
  7. 如权利要求6所述的显示装置，其中，所述显示装置还包括与所述显示屏连接的环境光亮度检测元件；
    所述环境光亮度检测元件被配置为根据环境光的亮度判断选取所述第一挡光板和所述第二挡光板中的一个处于所述第一状态，并将判断结果在所述显示屏中显示。
  8. 如权利要求6所述的显示装置，其中，所述第一挡光板及所述逆反射组件位于所述第二反射偏振片的同一端，所述第二挡光板及所述显示屏位于所述第二反射偏振片的同一端。
  9. 如权利要求2至5任一项所述的显示装置，其中，所述挡光结构包括一个挡光板，所述挡光板的位置可变。
  10. 如权利要求9所述的显示装置，其中，所述挡光板的位置位于所述第二反射偏振片的靠近所述透明反射元件的一端。
  11. 如权利要求9所述的显示装置，其中，所述挡光板的位置位于所述第二反射偏振片的远离所述透明反射元件的一端。
  12. 如权利要求2至5任一项所述的显示装置，其中，所述显示装置为车载显示装置，所述透明反射元件为车载透明玻璃。
  13. 如权利要求2至5任一项所述的显示装置，其中，所述挡光结构的材质为黑色吸光材料及电致变色材料中的一种。
  14. 如权利要求13所述的显示装置，其中，所述电致变色材料在通电的情况下为黑色，在不通电的情况下为透明色。
  15. 如权利要求2至5任一项所述的显示装置，其中，所述挡光结构为偏振方向与所述第二反射偏振片的偏振方向垂直的偏振片。
  16. 如权利要求2所述的显示装置，其中，自所述第一反射偏振片出射且入射到所述第二反射偏振片表面的光在经过所述逆反射组件后透过所述第二反射偏振片并在所述第二反射偏振片的出光侧形成第一图像，所述第一图像为实像且与所述显示屏上显示的图像呈镜像对称；
    自所述第一反射偏振片出射且直接入射到所述逆反射组件上的光逆反射至所述第一反射偏振片表面并在所述第一反射偏振片表面反射，形成反射光束，所述反射光束透过所述第二反射偏振片并在所述透明反射元件上反射且在所述透明反射元件远离所述第二反射偏振片的一侧形成第二图像，所述第二图像为虚像且与所述第二反射偏振片的出光面上显示的图像呈镜像对称。
  17. 如权利要求1所述的显示装置，其中，所述第一反射偏光片与所述第二反射偏光片之间的夹角范围为30°-80°。
  18. 如权利要求1或17所述的显示装置，其中，所述第一反射偏光片与所述第二反射偏光片之间的夹角范围为45°。
  19. 如权利要求1所述的显示装置，其中，所述显示装置的光效利用率大于或等于40%。
  20. 如权利要求1所述的显示装置，其中，所述透明反射元件与所述第二反射偏振片之间的夹角为锐角或钝角。
PCT/CN2024/099749 2023-11-30 2024-06-18 显示装置 Pending WO2025112460A1 (zh)

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