WO2024031837A1 - 一种显示设备及交通工具 - Google Patents

一种显示设备及交通工具 Download PDF

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Publication number
WO2024031837A1
WO2024031837A1 PCT/CN2022/126614 CN2022126614W WO2024031837A1 WO 2024031837 A1 WO2024031837 A1 WO 2024031837A1 CN 2022126614 W CN2022126614 W CN 2022126614W WO 2024031837 A1 WO2024031837 A1 WO 2024031837A1
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WO
WIPO (PCT)
Prior art keywords
screen
film
polarized light
polarizing film
curved mirror
Prior art date
Application number
PCT/CN2022/126614
Other languages
English (en)
French (fr)
Inventor
赵晴
陈拓
赵晗
Original Assignee
华为技术有限公司
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Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2024031837A1 publication Critical patent/WO2024031837A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • 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
    • 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

Definitions

  • the present application relates to the field of display, and in particular, to a display device and a vehicle.
  • a display device is a device that has the function of displaying images that can be viewed by the user, such as a head-up display (HUD), a projector, a table display, and other devices.
  • HUD head-up display
  • projector projector
  • table display and other devices.
  • HUD In products equipped with display devices, direct sunlight has a huge impact on both the product and the experience. Take HUD as an example. Direct sunlight hitting the structural parts of HUD will cause the structural parts to overheat, thereby shortening the service life of the display device. If the structural parts are not made of high-temperature resistant materials, the structural parts may be burned, causing safety issues.
  • Embodiments of the present application provide a display device and a vehicle. By adding baffles around the screen of the display device, the stray light reaching the structural component of the screen bracket (used to support the screen of the display device) is blocked and the screen bracket is prevented from Burned out due to overheating, thus extending the service life of the display device.
  • embodiments of the present application first provide a display device that can be used in the display field, for example, can be applied in HUDs in automotive field scenes.
  • the display device includes: an image generation device, a screen, a screen bracket, and a baffle.
  • the image generating device is used to generate imaging light carrying image information and send the imaging light to the screen;
  • the screen is used to receive and display the imaging light generated by the image generating device;
  • the screen bracket is used to support the screen.
  • the edge of the screen bracket can protrude from the edge of the screen; the baffle is located around the image generating device, for example, can be located around the image generating device to block stray light reaching the screen bracket, wherein the baffle is located around the image generating device.
  • the board can be in any shape or shape that can block light, and this application does not limit this.
  • baffles are added around the screen of the display device to block stray light reaching the screen bracket, a structural component, and prevent the screen bracket from overheating and burning, thereby increasing the service life of the display device and improving user experience. experience.
  • the properties of the baffle may include: high temperature resistant material.
  • the baffle is made of high-temperature-resistant material in order to achieve better thermal conductivity.
  • the angle between the plane where the baffle is located and the plane where the screen is located is within a preset angle range, for example, the The angle between the planes is not less than the first angle value (such as 10°) and not greater than the second angle value (such as 170°).
  • the first angle value and the second angle value can be customized, for example, according to the block
  • the height of the board is used to adjust the range of the two included angle values, which is not limited in this application.
  • the tilt angle of the bezel relative to the screen can be customized, providing flexibility.
  • the display device may further include: a filter whose emission angle is within a preset threshold range (for example, the emission angle is within ⁇ 10°).
  • a preset The threshold range can be set relatively small, so the filter used in this application can also be called a small-angle filter.
  • the optical filter is located above the screen and is used to pass the light beam with an exit angle within a preset threshold range, and the light beam is propagated from the image generating device to the optical filter.
  • a small-angle filter is added above the screen so that glare with a large exit angle cannot pass through, which can reduce solar glare to a great extent.
  • the angle between the filter and the screen is greater than zero, that is, the filter can be set at a certain angle with the screen, and the two are not parallel.
  • the purpose of setting a certain angle between the filter and the screen is to prevent specular reflection and improve the user experience.
  • the display device may further include: a polarizing film and a quarter film, the polarizing film and the quarter film are located on the same side of the screen, wherein sunlight enters the polarizing film, 1/4 film and screen.
  • the polarizing film is used to transmit S-polarized light and resist the transmission of P-polarized light;
  • the 1/4 film is used to transmit the S-polarized light transmitted by the polarizing film, so that the S-polarized light transmitted by the 1/4 film passes through the screen for the first time. After reflection, it becomes P-polarized light when transmitted through the 1/4 film again. That is to say, S-polarized light becomes P-polarized light after passing through the 1/4 film twice.
  • the sunlight enters the polarizing film, the 1/4 film and the screen in sequence. This means that the light path of the sunlight passes through the polarizing film, the 1/4 film and the screen in sequence. After the sunlight enters each of the above devices, the sunlight contains The components of the light beam may vary, which will not be described in detail in this application. It should also be noted that in the following embodiments, the situation in which sunlight enters each device sequentially is similar, and this will not be described again in the following embodiments.
  • a combination of a polarizing film and a quarter film can also be used to eliminate glare.
  • the polarizing film transmits S-polarized light, and the S-polarized light becomes P-polarized light after passing through the quarter-film twice. Light cannot escape from the polarizing film, thus reducing glare.
  • the display device may further include: a dust cover, a polarizing film located on the dust cover, and a 1/4 film located on the screen, wherein sunlight enters the dust cover in sequence. , polarizing film, 1/4 film and screen.
  • the polarizing film is used to transmit S-polarized light and resist the transmission of P-polarized light;
  • the 1/4 film is used to transmit the S-polarized light transmitted by the polarizing film, so that the S-polarized light transmitted by the 1/4 film passes through the screen for the first time. After reflection, it is transmitted through the 1/4 film again and becomes P-polarized light.
  • the combination of polarizing film and 1/4 film is still used to eliminate glare, but the polarizing film is deployed under the dust cover (that is, attached to the lower surface of the dust cover). Deployment is flexible.
  • the display device may also include: a dust cover, a polarizing film located on the dust cover, and a 1/4 film located on the screen, wherein sunlight enters the polarizing film, Dust cover, 1/4 film and screen.
  • the polarizing film is used to transmit S-polarized light and resist the transmission of P-polarized light;
  • the 1/4 film is used to transmit the S-polarized light transmitted by the polarizing film, so that the S-polarized light transmitted by the 1/4 film passes through the screen for the first time. After reflection, it is transmitted through the 1/4 film again and becomes P-polarized light.
  • a combination of polarizing film and 1/4 film is still used to eliminate glare, but the polarizing film is deployed on top of the dust cover (that is, attached to the upper surface of the dust cover). Deployment is flexible.
  • the display device may further include: a dust cover, at least one curved mirror, and a polarization polarizer located on one of the at least one curved mirror (which may be called a target curved mirror). film and the 1/4 film located on the screen, in which sunlight sequentially enters the dust cover, the at least one curved mirror except the target curved mirror, the target curved mirror (including polarizing film), and the 1/4 film As well as the screen, it should be noted that since the polarizing film can be attached to any curved mirror, the order in which sunlight enters the curved mirror is determined by the target curved mirror (including polarizing film) and at least one curved mirror other than the target curved mirror. The positional relationship between other curved mirrors is determined.
  • the above-mentioned injection sequence is only an indication and is not limited in this application.
  • the polarizing film is used to transmit S-polarized light and resist the transmission of P-polarized light;
  • the 1/4 film is used to transmit the S-polarized light transmitted by the polarizing film, so that the S-polarized light transmitted by the 1/4 film passes through the screen for the first time. After reflection, it is transmitted through the 1/4 film again and becomes P-polarized light.
  • the positioning and arrangement of the polarizing film is flexible and universal.
  • the at least one curved mirror may include: a first curved mirror and a second curved mirror; wherein the first curved mirror and the second curved mirror are used to reflect the imaging light in sequence, The sequentially reflected imaging light can be further projected onto a reflective element (such as a windshield) to form a virtual image that is received by the human eye.
  • a reflective element such as a windshield
  • the display device may also include a curved mirror for reflecting imaging light, which is feasible.
  • a second aspect of this application also provides a display device, which includes: an image generating device, a screen, a screen bracket, and a filter.
  • the image generating device is used to generate imaging light carrying image information and send the imaging light to the screen;
  • the screen is used to receive and display the imaging light generated by the image generating device;
  • the screen bracket is used to support the screen.
  • the edge of the screen bracket can protrude from the edge of the screen;
  • the optical filter is located above the screen and is used to pass a light beam with an exit angle within a preset threshold range, and the light beam is propagated from the image generation device to the optical filter, where , the exit angle of the light beam passing through the filter is within the preset threshold range (for example, the exit angle is ⁇ 10°).
  • the preset threshold range can be set relatively small, so the filter used in this application can also be called a small angle filter. light sheet.
  • a small-angle filter is added above the screen so that glare with a large exit angle cannot pass through. This can reduce solar glare to a great extent and improve user experience.
  • the angle between the filter and the screen is greater than zero, that is, the filter can be set at a certain angle with the screen, and the two are not parallel.
  • the purpose of setting a certain angle between the filter and the screen is to prevent specular reflection and improve the user experience.
  • the display device may further include: a polarizing film and a quarter film, the polarizing film and the quarter film are located on the same side of the screen, wherein sunlight enters the polarizing film, 1/4 film and screen.
  • the polarizing film is used to transmit S-polarized light and resist the transmission of P-polarized light;
  • the 1/4 film is used to transmit the S-polarized light transmitted by the polarizing film, so that the S-polarized light transmitted by the 1/4 film passes through the screen for the first time. After reflection, it is transmitted through the 1/4 film again and becomes P-polarized light.
  • a combination of a polarizing film and a quarter film can also be used to eliminate glare.
  • the polarizing film transmits S-polarized light, and the S-polarized light becomes P-polarized light after passing through the quarter-film twice. Light cannot escape from the polarizing film, thus reducing glare.
  • the display device may further include: a dust cover, a polarizing film located on the dust cover, and a 1/4 film located on the screen, wherein sunlight enters the dust cover in sequence. , polarizing film, 1/4 film and screen.
  • the polarizing film is used to transmit S-polarized light and resist the transmission of P-polarized light;
  • the 1/4 film is used to transmit the S-polarized light transmitted by the polarizing film, so that the S-polarized light transmitted by the 1/4 film passes through the screen for the first time. After reflection, it is transmitted through the 1/4 film again and becomes P-polarized light.
  • the combination of polarizing film and 1/4 film is still used to eliminate glare, but the polarizing film is deployed under the dust cover (that is, attached to the lower surface of the dust cover). Deployment is flexible.
  • the display device may also include: a dust cover, a polarizing film located on the dust cover, and a 1/4 film located on the screen, wherein sunlight enters the polarizing film, Dust cover, 1/4 film and screen.
  • the polarizing film is used to transmit S-polarized light and resist the transmission of P-polarized light;
  • the 1/4 film is used to transmit the S-polarized light transmitted by the polarizing film, so that the S-polarized light transmitted by the 1/4 film passes through the screen for the first time. After reflection, it is transmitted through the 1/4 film again and becomes P-polarized light.
  • a combination of polarizing film and 1/4 film is still used to eliminate glare, but the polarizing film is deployed on top of the dust cover (that is, attached to the upper surface of the dust cover). Deployment is flexible.
  • the display device may further include: a dust cover, at least one curved mirror, and a polarization polarizer located on one of the at least one curved mirror (which may be called a target curved mirror). film and the 1/4 film located on the screen, in which sunlight sequentially enters the dust cover, the at least one curved mirror except the target curved mirror, the target curved mirror (including polarizing film), and the 1/4 film
  • the polarizing film can be attached to any curved mirror, the order in which sunlight enters the curved mirror is determined by the target curved mirror (including polarizing film) and at least one curved mirror other than the target curved mirror. The positional relationship between other curved mirrors is determined.
  • the above-mentioned injection sequence is only an indication and is not limited in this application.
  • the polarizing film is used to transmit S-polarized light and resist the transmission of P-polarized light;
  • the 1/4 film is used to transmit the S-polarized light transmitted by the polarizing film, so that the S-polarized light transmitted by the 1/4 film passes through the screen for the first time. After reflection, it is transmitted through the 1/4 film again and becomes P-polarized light.
  • the positioning and arrangement of the polarizing film is flexible and universal.
  • the display device may further include: a baffle located around the image generating device.
  • the baffle may be located around the image generating device to prevent the screen bracket from reaching the screen bracket.
  • stray light where the baffle can be in any form or shape that can block light, which is not limited in this application.
  • baffles are added around the screen of the display device to block stray light reaching the screen bracket, a structural component, and prevent the screen bracket from overheating and burning, thereby increasing the service life of the display device and improving user experience. experience.
  • the properties of the baffle may include: high temperature resistant material.
  • the baffle is made of high-temperature-resistant material in order to achieve better thermal conductivity.
  • the angle between the plane where the baffle is located and the plane where the screen is located is within a preset angle range, for example, the The angle between the planes is not less than the first angle value (such as 10°) and not greater than the second angle value (such as 170°).
  • the first angle value and the second angle value can be customized, for example, according to the block
  • the height of the board is used to adjust the range of the two included angle values, which is not limited in this application.
  • the tilt angle of the bezel relative to the screen can be customized, providing flexibility.
  • the at least one curved mirror may include: a first curved mirror and a second curved mirror; wherein the first curved mirror and the second curved mirror are used to reflect the imaging light in sequence, The sequentially reflected imaging light can be further projected onto a reflective element (such as a windshield) to form a virtual image that is received by the human eye.
  • a reflective element such as a windshield
  • the display device may also include a curved mirror for reflecting imaging light, which is feasible.
  • a third aspect of this application also provides a display device, which includes: an image generating device, a screen, a screen bracket, a polarizing film, and a quarter film.
  • the image generating device is used to generate imaging light carrying image information and send the imaging light to the screen.
  • the imaging light can be called the first imaging light;
  • the screen is used to receive and display the first imaging light generated by the image generating device.
  • the screen bracket is used to support the screen.
  • the edge of the screen bracket can protrude from the edge of the screen; wherein, sunlight enters the polarizing film, the 1/4 film and the screen in sequence.
  • the polarizing film is used to transmit S-polarized light and resist the transmission of P-polarized light; the 1/4 film is used to transmit the S-polarized light transmitted by the polarizing film, so that the S-polarized light transmitted by the 1/4 film passes through the screen for the first time. After reflection, it is transmitted through the 1/4 film again and becomes P-polarized light.
  • a combination of a polarizing film and a quarter film can also be used to eliminate glare.
  • the polarizing film transmits S-polarized light, and the S-polarized light becomes P-polarized light after passing through the quarter-film twice. Light cannot escape from the polarizing film, thus reducing glare.
  • both the polarizing film and the quarter film may be located on the screen.
  • the display device may further include: a dust cover, and the polarizing film may be located on the dust cover (such as deployed on the upper or lower surface of the dust cover), in this case , if the polarizing film is arranged on the lower surface of the dust cover, the sunlight will enter the dust cover, polarizing film, 1/4 film and screen in sequence. If the polarizing film is arranged on the upper surface of the dust cover, the sunlight will enter the polarizing film, polarizing film, 1/4 film and screen in sequence. Dust cover, 1/4 film and screen; the polarizing film can also be located on one of the at least one curved mirror (which can be called the target curved mirror).
  • the position and deployment position of the polarizing film is flexible and universal.
  • the display device may further include: a filter whose emission angle is within a preset threshold range (for example, the emission angle is within ⁇ 10°).
  • a preset The threshold range can be set relatively small, so the filter used in this application can also be called a small-angle filter.
  • the optical filter is located above the screen and is used to pass the light beam with an exit angle within a preset threshold range, and the light beam is propagated from the image generating device to the optical filter.
  • a small-angle filter is added above the screen so that glare with a large exit angle cannot pass through, which can reduce solar glare to a great extent.
  • the angle between the filter and the screen is greater than zero, that is, the filter can be set at a certain angle with the screen, and the two are not parallel.
  • the purpose of setting a certain angle between the filter and the screen is to prevent specular reflection and improve the user experience.
  • the display device may further include: a baffle located around the image generating device.
  • the baffle may be located around the image generating device to prevent the screen bracket from reaching the screen bracket.
  • stray light where the baffle can be in any form or shape that can block light, which is not limited in this application.
  • baffles are added around the screen of the display device to block stray light reaching the screen bracket, a structural component, and prevent the screen bracket from overheating and burning, thereby increasing the service life of the display device and improving user experience. experience.
  • the properties of the baffle may include: high temperature resistant material.
  • the baffle is made of high-temperature-resistant material in order to achieve better thermal conductivity.
  • the angle between the plane where the baffle is located and the plane where the screen is located is within a preset angle range, for example, the The angle between the planes is not less than the first angle value (such as 10°) and not greater than the second angle value (such as 170°).
  • the first angle value and the second angle value can be customized, for example, according to the block
  • the height of the board is used to adjust the range of the two included angle values, which is not limited in this application.
  • the tilt angle of the bezel relative to the screen can be customized, providing flexibility.
  • the at least one curved mirror may include: a first curved mirror and a second curved mirror; wherein the first curved mirror and the second curved mirror are used to reflect the imaging light in sequence, The sequentially reflected imaging light can be further projected onto a reflective element (such as a windshield) to form a virtual image that is received by the human eye.
  • a reflective element such as a windshield
  • the display device may also include a curved mirror for reflecting imaging light, which is feasible.
  • the fourth aspect of this application provides a vehicle.
  • the vehicle includes the method described in the aforementioned first aspect or any one of the first aspect's optional methods, the second aspect or any one of the second aspect's optional methods, the third aspect or any one of the third aspect's optional methods.
  • display screen The display device is installed on the vehicle.
  • the vehicle may further include: a reflective element (such as a windshield), the display device is used to project the above-mentioned imaging light to the reflective element, and the reflective element is used to reflect the imaging light to form Virtual image so that the virtual image is received by the human eye.
  • a reflective element such as a windshield
  • the display device is used to project the above-mentioned imaging light to the reflective element
  • the reflective element is used to reflect the imaging light to form Virtual image so that the virtual image is received by the human eye.
  • Figure 1 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • Figure 2 is a schematic diagram of the relationship between the baffle and the protruding size of the edge of the screen bracket provided by the embodiment of the present application;
  • Figure 3 is a schematic diagram of the plane angle between the baffle and the screen provided by the embodiment of the present application.
  • Figure 4 is a comparison chart of energy simulation results of the screen bracket provided by the embodiment of the present application.
  • Figure 5 is another structural schematic diagram of a display device provided by an embodiment of the present application.
  • Figure 6 is another schematic structural diagram of a display device provided by an embodiment of the present application.
  • Figure 7 is another structural schematic diagram of a display device provided by an embodiment of the present application.
  • Figure 8 is another structural schematic diagram of a display device provided by an embodiment of the present application.
  • Figure 9 is a schematic diagram of a display device installed on a vehicle according to an embodiment of the present application.
  • Figure 10 is a schematic diagram of a possible functional framework of the vehicle provided by the embodiment of the present application.
  • Embodiments of the present application provide a display device and a vehicle.
  • a baffle around the screen of the display device By adding a baffle around the screen of the display device, the stray light reaching the structural component of the screen bracket is blocked, and the screen bracket is prevented from overheating and burning, thereby improving the performance of the display device.
  • the service life can save user costs and improve user experience.
  • the application scenarios of the display device in this application can be HUD, vehicle display screen, projector, table display, augmented reality (AR), virtual reality (VR) and other devices.
  • direct sunlight has a huge impact on both the product and the experience.
  • HUD as an example.
  • Direct sunlight hitting the structural parts of HUD will cause the structural parts to overheat, thereby shortening the service life of the display device. If the structural parts are not made of high-temperature resistant materials, the structural parts may be burned.
  • FIG. 1 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • the display device includes: an image generating device 101, a screen 102, a screen bracket 103 and a baffle 104.
  • the image generating device 101 is used to generate imaging light carrying image information and send the imaging light.
  • the imaging light can be called the first imaging light; the screen 102 can also be called the imaging screen (such as a diffusion screen), used to receive and display the first imaging light generated by the image generating device 101; the screen bracket 103, used to To support the screen 102, in the embodiment of the present application, the edge of the screen bracket 103 can protrude from the edge of the screen 102 (as shown in Figure 1); the baffle 104 is located around the image generating device 101, for example, can be located on the image The surroundings of the generating device are used to block stray light reaching the screen bracket 103.
  • the baffle 104 can be in any form or shape that can block light, and this application is not limited thereto.
  • the baffle 104 shown in Figure 1 is a front view, and only the baffles on the left and right opposite sides are shown. The baffles on the front and rear sides are not shown in Figure 1 .
  • the relative distances and sizes between the image generating device 101, the screen 102, the screen bracket 103 and the baffle 104 shown in FIG. 1 are schematic and are only for showing the image generating device 101.
  • the relative positional relationship between the screen 102, the screen bracket 103 and the baffle 104 does not constitute a limitation on the actual application.
  • the relative position between the image generation device 101 and the screen 102 in Figure 1 is only illustrative. In actual applications, the image generation device 101 and the screen 102 are separated by a certain distance (based on the specific application scenario). This application specifically does not limit this.
  • Other subsequent drawings are similar and will not be described in detail below.
  • the baffle 104 can also be located only in at least one direction around the image generating device 101 .
  • baffles may be provided only on two opposite sides of the image generating device 101 .
  • board 104 which can also achieve the function of partially blocking stray light reaching the screen bracket 103.
  • the baffle 104 is located around the image generating device 101 as an example. It should be noted here that the baffle 104 located around the image generating device 101 may be one or more baffles, or may be an integral baffle.
  • the baffle 104 may be provided around the image generating device 101 In this case, there may be four baffles 104 surrounding the image generation device 101, or a whole baffle 104 may be curved around the screen 102, which is not specifically limited in this application.
  • four baffles 104 surrounding the image generating device 101 are taken as an example for description.
  • optical elements such as optical path folding mirrors and reflective mirrors may be provided behind the screen 102 to project the first imaging light on the screen 102 onto the reflective elements, so that the virtual image formed on the reflective elements is received by the human eye.
  • optical elements in the HUD may be two curved mirrors, as shown in Figure 1.
  • the first curved mirror 105 and the second curved mirror 106 are respectively called the first curved mirror 105 and the second curved mirror 106, where the first curved mirror 105, used to reflect the first imaging light to obtain the imaging light after the first reflection; the second curved mirror 106, used to reflect the imaging light after the first reflection, to obtain the imaging light after the second reflection, It can be called the second imaging light, and the second imaging light can be further projected onto the windshield (for example, projected onto the windshield after passing through the dust cover) to form a virtual image that is received by the human eye.
  • the stray light blocked by the baffle 104 may come from more than one source.
  • the stray light may be sunlight that irradiates the first curved mirror 105 and is then reflected from the first curved mirror 105 to the second curved mirror 105 . Stray light from the curved mirror 106.
  • the height of the baffle 104 can be set according to the size of the screen bracket 103 , and the purpose of blocking stray light reaching the screen bracket 103 is achieved by adjusting the height of the baffle 104 .
  • the more the edge of the screen bracket 103 protrudes from the edge of the screen 102 the higher the height of the baffle 104 can be set, as h1 shown in sub-schematic diagram (a) of Figure 2;
  • the height of the baffle 104 can be set lower, such as h2 as shown in the sub-schematic diagram (b) of Figure 2, h1>h2.
  • the baffle 104 when the baffle 104 is set higher, it can also block stray light from the first curved mirror 105 to the second curved mirror 106 , further reducing the optical power of the second curved mirror 106 and improving the optical power of the second curved mirror 106 . service life. It should be noted here that in the case where four baffles 104 are surrounded by the image generating device 101, the heights of the four baffles can be consistent or different.
  • each baffle is The height value is not limited and can be set according to the application scenario. Similarly, if an integrally formed baffle surrounds the image generating device 101, the height of the baffle at each position can also be consistent or different, which will not be described again here.
  • the baffle 104 can be made of high-temperature resistant material.
  • the baffle can be made of a single metal (such as iron, copper, aluminum, etc.), Metal alloys (such as steel, brass, aluminum alloys, etc.) may also be non-metallic and other high-temperature-resistant materials (such as high-temperature-resistant polymers, high-temperature-resistant fiber materials, etc.), which are not specifically limited in this application.
  • the angle between the plane where the baffle 104 is located and the plane where the screen 102 is located can also be set according to actual needs.
  • the plane angle between the baffle 104 and the screen 102 may be within a preset angle range. For example, it may be no less than a first angle value (such as 20°) and no more than a second angle value (such as 160°). ), the first included angle value and the second included angle value can be customized.
  • the range of the two included angle values can be adjusted according to the height of the baffle 104, which is not limited in this application. As an example, please refer to Fig. 3.
  • Sub-schematic diagram (a) in Fig. 3 illustrates that the plane angle between the four baffles 104 around the screen 102 and the screen 102 is 90°.
  • Sub-schematic diagram (b) in Fig. 3 The sub-schematic diagram shows that the angle between the four baffles 104 around the screen 102 and the screen 102 is 120°.
  • FIG. 3 illustrates that the angles between the four baffles 104 around the screen 102 and the screen 102 are all the same.
  • the four baffles 104 are respectively in contact with the screen 102 .
  • the plane angles between the two opposite baffles 104 and the screen 102 can also be different.
  • the plane angle between the two opposite baffles 104 and the screen 102 can be 60°
  • the plane angle between the other two opposite baffles 104 and the screen 102 can be 60°. It is 120°. This application does not limit the specific value of the angle between the plane of each baffle 104 and the screen 102 .
  • the height of the baffle 104 can not only be set according to the size of the screen bracket 103, but also can be set according to the angle between the plane of the baffle 104 and the screen 102. set up. As an example, when the angle between the planes is 90°, the height of the baffle 104 can be set lower. When the angle between the planes is between 20° and 90°, the height of the baffle 104 can be set lower than the angle between the planes. The value has an inverse correlation (that is, the larger the angle between the planes, the lower the height). When the angle between the planes is between 90° and 160°, the height of the baffle 104 has a positive correlation with the value of the angle between the planes. (That is, the larger the angle between the planes, the higher the height).
  • Figure 4 is an energy simulation of sunlight backflow on the screen bracket 103.
  • the result comparison chart in which the units of the abscissa and ordinate of the schematic diagrams (a) and (b) in Figure 4 are millimeters, and the schematic diagram (a) in Figure 4 shows the situation without baffles.
  • the incident power of the screen bracket is 2.6W, and the maximum power density is 10609W/m 2 ;
  • the schematic diagram (b) in Figure 4 shows the situation with a baffle.
  • the screen bracket The incident power is 0.04W
  • the maximum power density is 3607W/m 2 . It can be seen that for display devices with baffles, both the incident power and the maximum power density on the screen bracket are greatly reduced.
  • direct sunlight hitting the structural parts of the display device will not only overheat the structural parts, but also direct sunlight hitting the internal mirror of the display device (such as the curved mirror of the HUD) or the light reflected back by the structural parts. Being seen by human eyes will also form a white spot (i.e. glare) in the field of vision, thus affecting the user experience (such as affecting driving).
  • glare can also be eliminated by adding small-angle filters, polarizing films, and quarter films above the screen. These two methods will reduce most of the incident light.
  • the glare reflected by the screen is introduced below:
  • the display device is still a HUD as an example.
  • the exit angle can be increased within the preset threshold range (such as the exit angle) by increasing the exit angle above the screen 102 of the display device.
  • the filter 107 within ⁇ 5° is used to pass the light beam with an exit angle within the preset threshold range, and the light beam is propagated from the image generating device 101 to the filter 107 .
  • the preset threshold range can be set relatively small. Therefore, the filter used in this application can also be called a small-angle filter, that is, the filter only allows light beams within a small angle range.
  • Beams emitted from the filter cannot pass through beams with larger angles.
  • the imaging light generated by the image generating device 101 is a small-angle beam, which can pass through the filter 107.
  • the large-angle glare caused by reflection after the sun directly hits the screen 102 cannot pass through the filter 107. This can Reduces sun glare to a great extent. It should be noted that this application does not limit the type of optical filter used.
  • Figure 5 is a diagram using a HUD as an example, so it has a first curved mirror 105 and a second curved mirror 106.
  • the filter 107 can be set at a certain angle with the screen 102. , that is, the angle between the filter 107 and the screen 102 is greater than zero (that is, the two are not parallel).
  • the filter 107 and the screen 102 are arranged at a certain angle, which may be in an inclined manner as shown in Figure 5 or in an inclined manner as shown in Figure 6, and
  • the tilt angle (that is, the included angle) can be set according to the specific application scenario, and this application does not limit this.
  • Figure 5 takes a HUD as an example.
  • the display device may not need modules such as the first curved mirror 105, the second curved mirror 106, and the dust cover, or, Some other modules may be added or deleted according to application requirements. This application does not limit this, but the image generation device 101, screen 102, screen bracket 103 and filter 107 are necessary modules.
  • the optical filter 107 is deployed above the baffle 104 (that is, the baffle 104 serves as a supporting structural member of the optical filter 107), that is, through the "baffle 104 + optical filter” 107" combination to achieve the functions of preventing the screen bracket 103 from overheating and preventing sun glare; and in other embodiments of the present application, the filter 107 can be deployed separately, that is, not deployed above the baffle 104, but through Additional supporting structural members (such as 4 brackets) support, that is, only through the "filter 107", to achieve the function of preventing solar glare. In actual applications, solutions can be selected based on functional requirements, which is not limited in this application.
  • a combination of a polarizing film and a quarter film can also be used to eliminate glare.
  • the polarizing film and the 1/4 film are both located above the screen, where the polarizing film is used to transmit S-polarized light and resist the transmission of P-polarized light, that is, the polarizing film transmits S-polarized light and does not transmit P-polarized light (i.e., P-polarized light). Polarized light cannot be emitted from the polarizing film); 1/4 film is used to change S polarized light into P polarized light when S polarized light passes through it for the second time. In other words, S polarized light passes through the 1/4 film twice. Then it becomes P polarized light.
  • the specific arrangement methods of the polarizing film and the quarter film may include but are not limited to the following methods:
  • Figure 7 is to illustrate the working principle, so when drawing the polarizing film 108 and the 1/4 film 109, they are drawn in the middle. Among them, The polarizing film 108 and the 1/4 film 109 can be completely tightly attached to each other without leaving a gap in the middle; the polarizing film 108 and the 1/4 film 109 can also have a gap in the middle (such as being separated by glass). Specifically, this application There is no restriction on this.
  • the 1/4 film 109 can be attached to the screen 102 (in FIG. 7, in order to facilitate the explanation of the principle, the two are drawn parallel), or can be deployed independently, but it needs to be Ensure that the S-polarized light transmitted from the polarizing film 108 is not vertically incident on the 1/4 film 109. This is to avoid incomplete polarization conversion and easy inclusion of impurities when the light passes through the polarizer and the 1/4 film at different angles. The problem of light.
  • polarizing film 108 transmits S-polarized light and blocks P-polarized light; in other embodiments of the present application, a polarizing film that transmits P-polarized light and blocks S-polarized light may also be used.
  • S-polarized light what is shown by the dotted line in Figure 7
  • P-polarized light what is shown by the solid line. The rest of the process is similar and will not be described again here.
  • Figure 7 also takes HUD as an example.
  • the display device may not need modules such as the first curved mirror 105, the second curved mirror 106, and the dust cover, or according to application requirements.
  • This application does not limit the addition or deletion of some other modules, but the image generation device 101, the screen 102, the screen bracket 103, the polarizing film 108, and the quarter film 109 are necessary modules.
  • the polarizing film 108 is deployed on the dust cover (as shown by the double dotted lines that are attached to the dust cover in Figure 8).
  • the dust cover with the polarizing film 108 deployed can be called a polarizing dust cover (in the HUD, the dust cover is located above the curved mirror, therefore, the dust cover with the polarizing film 108 is also located above the screen 102), 1 /4 film 109 is above the screen 102 (such as attached to the screen 102 or deployed independently).
  • polarizing dust cover only S polarized light can pass through, and S polarized light passes through the 1/4 film twice and becomes P Polarized light can no longer pass through the polarizing dust cover, thus reducing glare.
  • the above-mentioned polarizing film 108 transmits S-polarized light and blocks P-polarized light; in other embodiments of the present application, a polarizing film that transmits P-polarized light and blocks S-polarized light can also be used.
  • a polarizing film that transmits P-polarized light and blocks S-polarized light can also be used.
  • what is shown by the dotted line in Figure 8 is S-polarized light
  • what is shown by the solid line is P-polarized light. The rest of the process is similar and will not be described again here.
  • the above two ways of this application are two typical ways of arranging the polarizing film and the 1/4 film.
  • the 1/4 film 109 can also be combined with the polarizing film 109.
  • the films 108 are bonded together to form a combined film, and the combined film is placed on the dust cover. This application does not limit the specific placement positions of the polarizing film 108 and the 1/4 film 109.
  • baffle 104 in addition to the polarizing film 108 and the 1/4 film 109, there is also a baffle 104.
  • the baffle 104 can be used as the 1/4 film 109 (or the polarizing film 108 and the 1/4 film 109).
  • the support structure of the combined film is to achieve the functions of preventing the screen bracket 103 from overheating and preventing solar glare through the combination of "baffle 104 + polarizing film 108 and 1/4 film 109"; and in other aspects of this application
  • the polarizing film 108 and the 1/4 film 109 can be deployed separately, that is, the baffle 104 is not needed, and only the "polarizing film 108 and the 1/4 film 109" are used to achieve the function of preventing solar glare.
  • solutions can be selected based on functional requirements, which is not limited in this application.
  • a combination of "baffle 104 + filter 107 + polarizing film 108 and 1/4 film 109" can also be used.
  • the function of preventing the screen bracket 103 from overheating and better preventing sun glare can be achieved; alternatively, the combination of "filter 107 + polarizing film 108 and 1/4 film 109" can also be used to achieve better anti-sun glare function alone.
  • the baffle 104, the filter 107, the polarizing film 108 and the 1/4 film 109 are arranged in a manner similar to the above-mentioned separate deployment process. In actual applications, they only need to be used in combination. For details, please refer to the above description. No further details will be given here.
  • the display device provided by the embodiments of the present application can be used to display images in fields such as smart terminals and smart driving, multiple application scenarios implemented in products are introduced below.
  • the display device is HUD
  • the display device provided by the embodiment of the present application can be a HUD.
  • the HUD can project navigation information, instrument information, etc. in the driver's front field of view to prevent the driver from lowering his head to view this information, thus affecting driving. Safety.
  • the image projected by the HUD is reflected by the windshield and forms a virtual image outside the vehicle.
  • the types of HUD include but are not limited to windshield (W)-HUD, augmented reality head-up display (AR-HUD), etc.
  • the HUD provided by the embodiments of the present application can reduce the impact of glare.
  • the polarizing film and the quarter film, the baffle and/or the small-angle filter of the embodiments of the present application can be disposed in a configuration proposed by Nippon Seiki.
  • the display device is a projector
  • the display device provided by the embodiment of the present application may be a projector, and the projector may project images onto a wall or a projection screen.
  • the projector may also reduce the impact of glare.
  • the display device is a near-eye display (NED) device
  • the display device provided by the embodiment of the present application may be an NED device.
  • the NED device may be an AR device or a VR device.
  • the AR device may include but is not limited to AR glasses and AR helmets.
  • the VR device may include but Not limited to VR glasses and VR helmets.
  • AR glasses as an example, users can wear AR glasses to play games, watch videos, participate in virtual meetings, etc.
  • the NED device provided by the embodiment of the present application can also reduce the impact of glare and improve user experience.
  • the display device described in this application can not only be applied in the above-mentioned application scenarios, but also can be applied in various subdivisions of the display field, and no examples are given here.
  • FIG. 9 is a schematic diagram of a display device 901 installed on a vehicle according to an embodiment of the present application.
  • Vehicle windshields can act as curved mirrors or lenses. When the windshield serves as a curved mirror, the display device 901 and the driver or passenger are located on the same side of the windshield. When the windshield serves as a lens, the display device 901 and the driver or passenger are located on different sides of the windshield.
  • the display device 901 is used to output imaging light.
  • the windshield is used to reflect or transmit imaging light to form a virtual image.
  • the virtual image is on one side of the windshield, with the driver or passenger on the other side.
  • the reflected or transmitted imaging light irradiates the eyes of the driver or passenger respectively.
  • vehicles may be cars, trucks, motorcycles, buses, boats, airplanes, helicopters, lawn mowers, recreational vehicles, playground vehicles, construction equipment, trolleys, golf carts, trains, and handcarts etc.
  • the display device 901 can be installed on the instrument panel (IP) of the vehicle, located at the passenger or main driver position, or can be installed on the back of the seat.
  • IP instrument panel
  • the above display device 901 may be called a HUD when used in a vehicle, and may be used to display navigation information, vehicle speed, power/fuel level, etc.
  • FIG. 10 is a schematic diagram of a possible functional framework of the vehicle provided by the embodiment of the present application.
  • the functional framework of the vehicle may include various subsystems, such as the control system 14 in the figure, the sensor system 12 , one or more peripheral devices 16 (one is shown as an example in the figure), Power supply 18, computer system 20, display system 32.
  • the vehicle may also include other functional systems, such as an engine system that provides power for the vehicle, etc., which is not limited in this application.
  • the sensor system 12 may include several detection devices, which can sense the measured information and convert the sensed information into electrical signals or other required forms of information output according to certain rules.
  • these detection devices may include a global positioning system (GPS), vehicle speed sensor, inertial measurement unit (IMU), radar unit, laser rangefinder, camera device, wheel speed sensor, Steering sensors, gear sensors, or other components used for automatic detection, etc. are not limited in this application.
  • the control system 14 may include several elements, such as the illustrated steering unit, braking unit, lighting system, automatic driving system, map navigation system, network time synchronization system and obstacle avoidance system.
  • the control system 14 may also include components such as a throttle controller and an engine controller for controlling the driving speed of the vehicle, which are not limited in this application.
  • Peripheral device 16 may include several elements, such as a communication system, a touch screen, a user interface, a microphone and a speaker as shown, among others.
  • the communication system is used to realize network communication between vehicles and other devices other than vehicles.
  • the communication system can use wireless communication technology or wired communication technology to realize network communication between vehicles and other devices.
  • the wired communication technology may refer to communication between vehicles and other devices through network cables or optical fibers.
  • the power source 18 represents a system that provides power or energy to the vehicle, which may include, but is not limited to, rechargeable lithium batteries or lead-acid batteries, etc. In practical applications, one or more battery components in the power supply are used to provide electric energy or energy for starting the vehicle. The type and material of the power supply are not limited in this application.
  • the computer system 20 may include one or more processors 2001 (one processor is shown as an example) and a memory 2002 (which may also be referred to as a storage device).
  • the memory 2002 may also be inside the computer system 20 or outside the computer system 20 , for example, as a cache in a vehicle, etc., which is not limited by this application. in,
  • Processor 2001 may include one or more general-purpose processors, such as a graphics processing unit (GPU).
  • the processor 2001 may be used to run relevant programs or instructions corresponding to the programs stored in the memory 2002 to implement corresponding functions of the vehicle.
  • Memory 2002 may include volatile memory (volatile memory), such as RAM; memory may also include non-volatile memory (non-volatile memory), such as ROM, flash memory (flash memory) or solid state drive (solid state). drives, SSD); the memory 2002 may also include a combination of the above types of memory.
  • the memory 2002 can be used to store a set of program codes or instructions corresponding to the program codes, so that the processor 2001 can call the program codes or instructions stored in the memory 2002 to implement corresponding functions of the vehicle. This function includes but is not limited to some or all of the functions in the vehicle function framework diagram shown in Figure 13. In this application, a set of program codes for vehicle control can be stored in the memory 2002, and the processor 2001 calls the program codes to control the safe driving of the vehicle. How to achieve safe driving of the vehicle will be described in detail below in this application.
  • the memory 2002 may also store information such as road maps, driving routes, sensor data, and the like.
  • the computer system 20 can be combined with other elements in the vehicle functional framework diagram, such as sensors in the sensor system, GPS, etc., to implement vehicle-related functions.
  • the computer system 20 can control the driving direction or driving speed of the vehicle based on data input from the sensor system 12 , which is not limited in this application.
  • Display system 32 may include several elements, such as a controller and the display device 901 described above.
  • the controller is configured to generate images according to user instructions (such as generating images containing vehicle status such as vehicle speed, power/fuel level, and augmented reality AR content), and send the image content to the display device 901 .
  • the image generating device in the display device 901 is used to output imaging light carrying image information.
  • the windshield is used to reflect or transmit imaging light so that a virtual image corresponding to the image content is presented in front of the driver or passenger.
  • the functions of some components in the display system 32 can also be implemented by other subsystems of the vehicle.
  • the controller can also be a component in the control system 14 .
  • Figure 10 of this application shows that it includes four subsystems.
  • the sensor system 12, the control system 14, the computer system 20 and the display system 32 are only examples and do not constitute a limitation.
  • vehicles can combine several components in the vehicle according to different functions to obtain subsystems with corresponding different functions.
  • the vehicle may include more or fewer systems or components, which is not limited by this application.

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Abstract

一种显示设备（901）及交通工具，可应用于显示领域，例如，可应用于车领域的HUD中，该显示设备（901）包括：图像生成装置（101）、屏幕（102）、屏幕支架（103）以及挡板（104）。图像生成装置（101），用于生成携带图像信息的成像光，并将该成像光发送至屏幕（102）；屏幕（102），用于接收并显示图像生成装置（101）生成的成像光；屏幕支架（103），用于支撑屏幕（102），屏幕支架（103）的边缘可以突出于屏幕（102）的边缘；挡板（104），位于该图像生成装置（101）的周围，用于抵挡到达屏幕支架（103）的杂散光。通过在显示设备（901）的屏幕（102）周围加挡板（104），以抵挡到达屏幕支架（103）的杂散光，防止屏幕支架（103）过热而烧毁，从而提高显示设备（901）的使用寿命，提高用户使用体验。

Description

一种显示设备及交通工具
本申请要求于2022年8月9日提交中国国家知识产权局、申请号为202210950023.3、申请名称为“一种显示设备及交通工具”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示领域，尤其涉及一种显示设备及交通工具。
背景技术
显示设备是具有显示用户可观看的图像的功能的装置，例如，抬头显示(head up display，HUD)、投影仪、桌显等设备。
在部署有显示设备的产品中，阳光直射不管对产品还是体验来讲，影响都非常大。以HUD为例，阳光直射到HUD的结构件上，会使得结构件过热，从而减短显示设备的使用寿命，如果结构件不是耐高温材料，可能还会烧毁结构件，造成安全问题。
发明内容
本申请实施例提供了一种显示设备及交通工具，通过在显示设备的屏幕四周加挡板，以抵挡到达屏幕支架(用于支撑显示设备的屏幕)这一结构件的杂散光，防止屏幕支架过热而烧毁，从而提高显示设备的使用寿命。
基于此，本申请实施例提供以下技术方案：
第一方面，本申请实施例首先提供一种显示设备，可用于显示领域中，例如，可以应用于车领域场景的HUD中，该显示设备包括：图像生成装置、屏幕、屏幕支架以及挡板。其中，图像生成装置，用于生成携带图像信息的成像光，并将该成像光发送至屏幕；屏幕，用于接收并显示图像生成装置生成的成像光；屏幕支架，用于支撑屏幕，在本申请实施例中，屏幕支架的边缘可以突出于屏幕的边缘；挡板，位于该图像生成装置周围，例如，可以位于该图像生成装置的四周，用于抵挡到达屏幕支架的杂散光，其中，挡板可以是任意能挡光的形态或形状，本申请对此不做限定。
在本申请上述实施方式中，通过在显示设备的屏幕周围加挡板，以抵挡到达屏幕支架这一结构件的杂散光，防止屏幕支架过热而烧毁，从而提高显示设备的使用寿命，提高用户使用体验。
在第一方面的一种可能实现方式中，挡板的性质可以包括：耐高温材质。
在本申请上述实施方式中，挡板选择耐高温材质是为了实现更好的导热效果。
在第一方面的一种可能实现方式中，挡板所处的平面与屏幕所处的平面之间的夹角(该夹角可称为片面夹角)在预设角度范围内，例如，该平面夹角不小于第一夹角值(如10°)，且不大于第二夹角值(如170°)，第一夹角值与第二夹角值可自定义，例如，可以根据挡板的高度来调节这两个夹角值的取值范围，本申请对此不做限定。
在本申请上述实施方式中，挡板相对于屏幕的倾斜角度可自定义，具备灵活性。
在第一方面的一种可能实现方式中，该显示设备还可以包括：出射角度在预设阈值范围内(如出射角度在±10°)的滤光片，在本申请实施例中，预设阈值范围可以设置的比较小，因此本申请使用的滤光片也可以称为小角度滤光片。其中，滤光片位于屏幕上方，用于通过出射角度在预设阈值范围内的光束，该光束由图像生成装置向滤光片传播。
在本申请上述实施方式中，通过在屏幕上方加小角度的滤光片，以使得出射角度大的眩光无法通过，这样可以在很大程度减小太阳眩光。
在第一方面的一种可能实现方式中，滤光片与屏幕之间的夹角大于零，即滤光片可以与屏幕呈一定夹角设置，两者不平行。
在本申请上述实施方式中，滤光片与屏幕之间呈一定夹角设置的目的是为了防止镜面反射，以提高用户使用体验。
在第一方面的一种可能实现方式中，该显示设备还可以包括：偏振膜和1/4膜，偏振膜和1/4膜均位于屏幕的同一侧，其中，阳光依次射入偏振膜、1/4膜以及屏幕。偏振膜，用于透射S偏振光，且抵挡P偏振光透射；1/4膜，用于透射偏振膜透射过的S偏振光，使得第一次由1/4膜透射的S偏振光经屏幕反射后再次经由1/4膜透射时变为P偏振光，也就是说，S偏振光经过两次1/4膜后变成P偏振光。这里需要注意的是，阳光依次射入偏振膜、1/4膜以及屏幕指的是阳光的光路依次经由偏振膜、1/4膜以及屏幕，在阳光射入上述每个器件后，阳光所包含光束的成分是可能存在变化的，具体本申请对此不予赘述。还需注意的是，以下各实施方式中阳光依次射入各个器件的情况是类似的，下述各实施方式对此不予赘述。
在本申请上述实施方式中，还可以利用偏振膜和1/4膜的组合来消除眩光，偏振膜透射S偏振光，S偏振光经过两次1/4膜后变成P偏振光，P偏振光无法从偏振膜出射，因此可减小眩光。
在第一方面的一种可能实现方式中，该显示设备还可以包括：防尘罩、位于防尘罩上的偏振膜和位于屏幕上的1/4膜，其中，阳光依次射入防尘罩、偏振膜、1/4膜以及屏幕。偏振膜，用于透射S偏振光，且抵挡P偏振光透射；1/4膜，用于透射偏振膜透射过的S偏振光，使得第一次由1/4膜透射的S偏振光经屏幕反射后再次经由1/4膜透射后变为P偏振光。
在本申请上述实施方式中，依然利用的是偏振膜和1/4膜的组合来消除眩光，但偏振膜是部署在防尘罩的下面(即贴在防尘罩下表面)，偏振膜的部署具备灵活性。
在第一方面的一种可能实现方式中，该显示设备还可以包括：防尘罩、位于防尘罩上的偏振膜和位于屏幕上的1/4膜，其中，阳光依次射入偏振膜、防尘罩、1/4膜以及屏幕。偏振膜，用于透射S偏振光，且抵挡P偏振光透射；1/4膜，用于透射偏振膜透射过的S偏振光，使得第一次由1/4膜透射的S偏振光经屏幕反射后再次经由1/4膜透射后变为P偏振光。
在本申请上述实施方式中，依然利用的是偏振膜和1/4膜的组合来消除眩光，但偏振膜是部署在防尘罩的上面(即贴在防尘罩上表面)，偏振膜的部署具备灵活性。
在第一方面的一种可能实现方式中，该显示设备还可以包括：防尘罩、至少一个曲面镜、位于该至少一个曲面镜的其中一个曲面镜(可称为目标曲面镜)上的偏振膜和位于屏幕上的1/4膜，其中，阳光依次射入防尘罩、该至少一个曲面镜中除目标曲面镜之外的曲面镜、目标曲面镜(含偏振膜)、1/4膜以及屏幕，需注意的是，由于偏振膜可以贴在任一个曲面镜上，因此阳光射入曲面镜的顺序由该目标曲面镜(含偏振膜)与至少一个曲面镜中除目标曲面镜之外的其他曲面镜之间的位置关系决定，上述射入次序仅为一种示意，本申请对此不做限定。偏振膜，用于透射S偏振光，且抵挡P偏振光透射；1/4膜，用于透射偏振膜透射过的S偏 振光，使得第一次由1/4膜透射的S偏振光经屏幕反射后再次经由1/4膜透射后变为P偏振光。
在本申请上述实施方式中，偏振膜的位置部署具备灵活性，具备普适性。
在第一方面的一种可能实现方式中，该至少一个曲面镜可以包括：第一曲面镜以及第二曲面镜；其中，第一曲面镜以及第二曲面镜，用于依次反射该成像光，依次反射后的成像光可以再进一步被投射到反射元件(如挡风玻璃)上，形成虚像被人眼接收。
在本申请上述实施方式中，显示设备还可以包括用于反射成像光的曲面镜，具备可实现性。
本申请第二方面还提供一种显示设备，该显示设备包括：图像生成装置、屏幕、屏幕支架以及滤光片。其中，图像生成装置，用于生成携带图像信息的成像光，并将该成像光发送至屏幕；屏幕，用于接收并显示图像生成装置生成的成像光；屏幕支架，用于支撑屏幕，在本申请实施例中，屏幕支架的边缘可以突出于屏幕的边缘；滤光片位于屏幕上方，用于通过出射角度在预设阈值范围内的光束，该光束由图像生成装置向滤光片传播，其中，光束经过滤光片的出射角度在预设阈值范围内(如出射角度在±10°)，预设阈值范围可以设置的比较小，因此本申请使用的滤光片也可以称为小角度滤光片。
在本申请上述实施方式中，通过在屏幕上方加小角度的滤光片，以使得出射角度大的眩光无法通过，这样可以在很大程度减小太阳眩光，提高用户使用体验。
在第二方面的一种可能实现方式中，滤光片与屏幕之间的夹角大于零，即滤光片可以与屏幕呈一定夹角设置，两者不平行。
在本申请上述实施方式中，滤光片与屏幕之间呈一定夹角设置的目的是为了防止镜面反射，以提高用户使用体验。
在第二方面的一种可能实现方式中，该显示设备还可以包括：偏振膜和1/4膜，偏振膜和1/4膜均位于屏幕的同一侧，其中，阳光依次射入偏振膜、1/4膜以及屏幕。偏振膜，用于透射S偏振光，且抵挡P偏振光透射；1/4膜，用于透射偏振膜透射过的S偏振光，使得第一次由1/4膜透射的S偏振光经屏幕反射后再次经由1/4膜透射后变为P偏振光。
在本申请上述实施方式中，还可以利用偏振膜和1/4膜的组合来消除眩光，偏振膜透射S偏振光，S偏振光经过两次1/4膜后变成P偏振光，P偏振光无法从偏振膜出射，因此可减小眩光。
在第二方面的一种可能实现方式中，该显示设备还可以包括：防尘罩、位于防尘罩上的偏振膜和位于屏幕上的1/4膜，其中，阳光依次射入防尘罩、偏振膜、1/4膜以及屏幕。偏振膜，用于透射S偏振光，且抵挡P偏振光透射；1/4膜，用于透射偏振膜透射过的S偏振光，使得第一次由1/4膜透射的S偏振光经屏幕反射后再次经由1/4膜透射后变为P偏振光。
在本申请上述实施方式中，依然利用的是偏振膜和1/4膜的组合来消除眩光，但偏振膜是部署在防尘罩的下面(即贴在防尘罩下表面)，偏振膜的部署具备灵活性。
在第二方面的一种可能实现方式中，该显示设备还可以包括：防尘罩、位于防尘罩上的偏振膜和位于屏幕上的1/4膜，其中，阳光依次射入偏振膜、防尘罩、1/4膜以及屏幕。偏振膜，用于透射S偏振光，且抵挡P偏振光透射；1/4膜，用于透射偏振膜透射过的S偏振光，使得第一次由1/4膜透射的S偏振光经屏幕反射后再次经由1/4膜透射后变为P偏振光。
在本申请上述实施方式中，依然利用的是偏振膜和1/4膜的组合来消除眩光，但偏振膜是部署在防尘罩的上面(即贴在防尘罩上表面)，偏振膜的部署具备灵活性。
在第二方面的一种可能实现方式中，该显示设备还可以包括：防尘罩、至少一个曲面镜、位于该至少一个曲面镜的其中一个曲面镜(可称为目标曲面镜)上的偏振膜和位于屏幕上的1/4膜，其中，阳光依次射入防尘罩、该至少一个曲面镜中除目标曲面镜之外的曲面镜、目标曲面镜(含偏振膜)、1/4膜以及屏幕，需注意的是，由于偏振膜可以贴在任一个曲面镜上，因此阳光射入曲面镜的顺序由该目标曲面镜(含偏振膜)与至少一个曲面镜中除目标曲面镜之外的其他曲面镜之间的位置关系决定，上述射入次序仅为一种示意，本申请对此不做限定。偏振膜，用于透射S偏振光，且抵挡P偏振光透射；1/4膜，用于透射偏振膜透射过的S偏振光，使得第一次由1/4膜透射的S偏振光经屏幕反射后再次经由1/4膜透射后变为P偏振光。
在本申请上述实施方式中，偏振膜的位置部署具备灵活性，具备普适性。
在第二方面的一种可能实现方式中，该显示设备还可以包括：挡板，该挡板位于该图像生成装置的周围，例如，可以位于该图像生成装置的四周，用于抵挡到达屏幕支架的杂散光，其中，挡板可以是任意能挡光的形态或形状，本申请对此不做限定。
在本申请上述实施方式中，通过在显示设备的屏幕周围加挡板，以抵挡到达屏幕支架这一结构件的杂散光，防止屏幕支架过热而烧毁，从而提高显示设备的使用寿命，提高用户使用体验。
在第二方面的一种可能实现方式中，挡板的性质可以包括：耐高温材质。
在本申请上述实施方式中，挡板选择耐高温材质是为了实现更好的导热效果。
在第二方面的一种可能实现方式中，挡板所处的平面与屏幕所处的平面之间的夹角(该夹角可称为片面夹角)在预设角度范围内，例如，该平面夹角不小于第一夹角值(如10°)，且不大于第二夹角值(如170°)，第一夹角值与第二夹角值可自定义，例如，可以根据挡板的高度来调节这两个夹角值的取值范围，本申请对此不做限定。
在本申请上述实施方式中，挡板相对于屏幕的倾斜角度可自定义，具备灵活性。
在第二方面的一种可能实现方式中，该至少一个曲面镜可以包括：第一曲面镜以及第二曲面镜；其中，第一曲面镜以及第二曲面镜，用于依次反射该成像光，依次反射后的成像光可以再进一步被投射到反射元件(如挡风玻璃)上，形成虚像被人眼接收。
在本申请上述实施方式中，显示设备还可以包括用于反射成像光的曲面镜，具备可实现性。
本申请第三方面还提供一种显示设备，该显示设备包括：图像生成装置、屏幕、屏幕支架、偏振膜以及1/4膜。其中，图像生成装置，用于生成携带图像信息的成像光，并将该成像光发送至屏幕，该成像光可称为第一成像光；屏幕，用于接收并显示图像生成装置生成的第一成像光；屏幕支架，用于支撑屏幕，在本申请实施例中，屏幕支架的边缘可以突出于屏幕的边缘；其中，阳光依次射入偏振膜、1/4膜以及屏幕。偏振膜，用于透射S偏振光，且抵挡P偏振光透射；1/4膜，用于透射偏振膜透射过的S偏振光，使得第一次由1/4膜透射的S偏振光经屏幕反射后再次经由1/4膜透射后变为P偏振光。
在本申请上述实施方式中，还可以利用偏振膜和1/4膜的组合来消除眩光，偏振膜透射S偏振光，S偏振光经过两次1/4膜后变成P偏振光，P偏振光无法从偏振膜出射，因此可减小眩光。
在第三方面的一种可能的实现方式中，偏振膜和1/4膜可以均位于屏幕上。
在本申请上述实施方式中，阐述了偏振膜和1/4膜的部署位置的一种实现方式，具备灵活性。
在第三方面的一种可能实现方式中，该显示设备还可以包括：防尘罩，偏振膜可以位于防尘罩上(如部署于防尘罩上表面或下表面)，在这种情况下，若偏振膜部署于防尘罩下表面，则阳光依次射入防尘罩、偏振膜、1/4膜以及屏幕，若偏振膜部署于防尘罩上表面，则阳光依次射入偏振膜、防尘罩、1/4膜以及屏幕；偏振膜也可以位于该至少一个曲面镜的其中一个曲面镜(可称为目标曲面镜)上，在这种情况下，阳光依次射入防尘罩、该至少一个曲面镜中除目标曲面镜之外的曲面镜、目标曲面镜(含偏振膜)、1/4膜以及屏幕，需注意的是，由于偏振膜可以贴在任一个曲面镜上，因此阳光射入曲面镜的顺序由该目标曲面镜(含偏振膜)与至少一个曲面镜中除目标曲面镜之外的其他曲面镜之间的位置关系决定，上述射入次序仅为一种示意，本申请对此不做限定。
在本申请上述实施方式中，偏振膜的位置部署位置具备灵活性，具备普适性。
在第三方面的一种可能实现方式中，该显示设备还可以包括：出射角度在预设阈值范围内(如出射角度在±10°)的滤光片，在本申请实施例中，预设阈值范围可以设置的比较小，因此本申请使用的滤光片也可以称为小角度滤光片。其中，滤光片位于屏幕上方，用于通过出射角度在预设阈值范围内的光束，该光束由图像生成装置向滤光片传播。
在本申请上述实施方式中，通过在屏幕上方加小角度的滤光片，以使得出射角度大的眩光无法通过，这样可以在很大程度减小太阳眩光。
在第三方面的一种可能实现方式中，滤光片与屏幕之间的夹角大于零，即滤光片可以与屏幕呈一定夹角设置，两者不平行。
在本申请上述实施方式中，滤光片与屏幕之间呈一定夹角设置的目的是为了防止镜面反射，以提高用户使用体验。
在第三方面的一种可能实现方式中，该显示设备还可以包括：挡板，该挡板位于该图像生成装置的周围，例如，可以位于该图像生成装置的四周，用于抵挡到达屏幕支架的杂散光，其中，挡板可以是任意能挡光的形态或形状，本申请对此不做限定。
在本申请上述实施方式中，通过在显示设备的屏幕周围加挡板，以抵挡到达屏幕支架这一结构件的杂散光，防止屏幕支架过热而烧毁，从而提高显示设备的使用寿命，提高用户使用体验。
在第三方面的一种可能实现方式中，挡板的性质可以包括：耐高温材质。
在本申请上述实施方式中，挡板选择耐高温材质是为了实现更好的导热效果。
在第三方面的一种可能实现方式中，挡板所处的平面与屏幕所处的平面之间的夹角(该夹角可称为片面夹角)在预设角度范围内，例如，该平面夹角不小于第一夹角值(如10°)，且不大于第二夹角值(如170°)，第一夹角值与第二夹角值可自定义，例如，可以根据挡板的高度来调节这两个夹角值的取值范围，本申请对此不做限定。
在本申请上述实施方式中，挡板相对于屏幕的倾斜角度可自定义，具备灵活性。
在第三方面的一种可能实现方式中，该至少一个曲面镜可以包括：第一曲面镜以及第二曲面镜；其中，第一曲面镜以及第二曲面镜，用于依次反射该成像光，依次反射后的成像光可以再进一步被投射到反射元件(如挡风玻璃)上，形成虚像被人眼接收。
在本申请上述实施方式中，显示设备还可以包括用于反射成像光的曲面镜，具备可实现性。
本申请第四方面提供了一种交通工具。交通工具包括如前述第一方面或第一方面任意一种可选方式、第二方面或第二方面任意一种可选方式、第三方面或第三方面任意一种可选方式中所述的显示设备。显示设备安装在交通工具上。
在第四方面的一种可能实现方式中，交通工具还可以包括：反射元件(如挡风玻璃)，该显示设备用于向反射元件投射上述成像光，反射元件用于反射该成像光，形成虚像，以使得该虚像被人眼接收。
附图说明
图1为本申请实施例提供的显示设备的一个结构示意图；
图2为本申请实施例提供的挡板与屏幕支架边缘突出尺寸之间的一个关系示意图；
图3为本申请实施例提供的挡板与屏幕之间的平面夹角的一个示意图；
图4为本申请实施例提供的屏幕支架阳光倒灌的一个能量仿真结果对比图；
图5为本申请实施例提供的显示设备的另一结构示意图；
图6为本申请实施例提供的显示设备的另一结构示意图；
图7为本申请实施例提供的显示设备的另一结构示意图；
图8为本申请实施例提供的显示设备的另一结构示意图；
图9为本申请实施例提供显示设备安装在交通工具的一个示意图；
图10为本申请实施例提供的交通工具的一种可能的功能框架示意图。
具体实施方式
本申请实施例提供了一种显示设备及交通工具，通过在显示设备的屏幕周围加挡板，以抵挡到达屏幕支架这一结构件的杂散光，防止屏幕支架过热而烧毁，从而提高显示设备的使用寿命，可以节约用户成本，提高用户体验。
本申请的说明书和权利要求书及附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的术语在适当情况下可以互换，这仅仅是描述本申请的实施例中对相同属性的对象在描述时所采用的区分方式。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，以便包含一系列单元的过程、方法、系统、产品或设备不必限于那些单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它单元。
本申请中的显示设备的应用场景可以是HUD、车载显示屏、投影仪、桌显、增强显示(augment reality，AR)、虚拟显示(virtual reality，VR)等设备。在部署有显示设备的产品中，阳光直射不管对产品还是体验来讲，影响都非常大。以HUD为例，阳光直射到HUD的结构件(如屏幕支架)上，会使得结构件过热，从而减短显示设备的使用寿命，如果结构件不是耐高温材料，可能还会烧毁结构件。
为此，本申请提供了一种显示设备，为便于阐述，本申请下述实施例以HUD为例，对显示设备的结构进行说明。图1为本申请实施例提供的显示设备的一个结构示意图。如图1所示，该显示设备包括：图像生成装置101、屏幕102、屏幕支架103以及挡板104，其中，图像生成装置101，用于生成携带图像信息的成像光，并将该成像光发送至屏幕，该成像光可称为第一成像光；屏幕102也可称为成像屏(如扩散屏)，用于接收并显示图像生成装置101生成的第一成像光；屏幕支架103，用于支撑屏幕102，在本申请实施例中，屏幕支架103的边缘可以突出于屏幕102的边缘(如图1所示)；挡板104，位于该图像生成装置101的周围，例如，可以位于该图像生成装置的四周，用于抵挡到达屏幕支架103的杂散光，其中，挡板104可以是任意能挡光的形态或形状，本申请对此不做限定。需要注意的是，图1示意的挡 板104是主视图角度，只示意出了左、右两个对立面的挡板，前、后两个面的挡板在图1中未示出。还需要注意的是，图1示意的图像生成装置101、屏幕102、屏幕支架103以及挡板104两两之间的相对距离、各个尺寸大小等均为示意，仅是为了表现出图像生成装置101、屏幕102、屏幕支架103以及挡板104之间的相对位置关系，不构成对实际应用的限定。例如，图1中的图像生成装置101和屏幕102之间的相对位置只是示意，在实际应用中，图像生成装置101和屏幕102之间是相隔一定距离的(基于具体的应用场景而定)，具体本申请对此不做限定。后续其他附图也是类似的，以下不予赘述。
需要说明的是，在本申请的一些实施方式中，挡板104也可以仅位于该图像生成装置101四周中的至少一个方位，如，只在该图像生成装置101四周中的两个对立面设置挡板104，这样也能实现部分抵挡到达屏幕支架103杂散光的功能。为了便于阐述，在本申请下述实施例中均以挡板104位于该图像生成装置101的四周为例进行说明。这里需要注意的是，位于该图像生成装置101周围的挡板104可以是一块或多块挡板，也可以是一体成型的一整块挡板，例如，在图像生成装置101四周设置挡板104的情况下，可以是4块挡板104合围在图像生成装置101四周，也可以是一整块挡板104弯曲围绕在屏幕102四周，具体本申请对此不做限定。为便于阐述，在本申请下述实施例中，均以4块挡板104合围在图像生成装置101四周为例进行说明。
可选地，屏幕102之后还可以设置光路折叠镜、反射镜等光学元件，用于将屏幕102上的第一成像光投射到反射元件上，从而使得反射元件上形成的虚像被人眼接收。作为一个示例，上述光学元件在HUD中，可以是两个曲面镜，如图1所示，这两个曲面镜分别称为第一曲面镜105和第二曲面镜106，其中，第一曲面镜105，用于反射该第一成像光，得到第一次反射后的成像光；第二曲面镜106，用于反射该第一次反射后的成像光，得到第二次反射后的成像光，可称为第二成像光，该第二成像光可以再进一步被投射到挡风玻璃(如经过防尘罩后投射到挡风玻璃)上，形成虚像被人眼接收。需要注意的是，上述挡板104抵挡的杂散光的来源可能不止一个，作为一个示例，该杂散光可以是太阳光照射到第一曲面镜105后，再从第一曲面镜105反射到第二曲面镜106的杂散光。
需要说明的是，在本申请的一些实施方式中，挡板104的高度可以根据屏幕支架103的大小来设置，通过挡板104的高度调节来达到挡住到达屏幕支架103的杂散光的目的。作为一个示例，可参阅图2，屏幕支架103的边缘突出于屏幕102的边缘越多，则挡板104的高度可以设置的越高，如图2中的(a)子示意图所示的h1；反之，则挡板104的高度可以设置的低一些，如图2中的(b)子示意图所示的h2，h1＞h2。据此可抵挡大部分达到屏幕支架103的杂散光，大大降低屏幕支架上的光功率，防止屏幕支架103过热烧毁，提高产品使用的安全性。此外，当挡板104设置的较高时，还可以挡住第一曲面镜105到第二曲面镜106的杂散光，进一步降低了第二曲面镜106的光功率，提高了第二曲面镜106的使用寿命。这里需要注意的是，在4块挡板104合围在图像生成装置101四周的这种情况下，这4块挡板的高度可以保持一致，也可以各不相同，本申请对每块挡板的高度的取值不做限定，可根据应用场景设置。类似地，若是一体成型的一整块挡板合围在图像生成装置101四周的情况，每个方位处的挡板的高度也可以保持一致或各不相同，此处不予赘述。
还需要说明的是，在本申请的另一些实施方式中，为了更好的导热，挡板104可以是耐高温材质，例如，该挡板可以是单金属(如铁、铜、铝等)、金属合金(如钢、黄铜、铝合金等)，也可以是非金属的其他耐高温材料(如耐高温的高分子聚合物、耐高温纤维材料等)，具体本申请对此不做限定。
此外，在本申请的一些实施方式中，挡板104所处的平面与屏幕102所处的平面之间的夹角(该夹角可简称为平面夹角)也可以根据实际需要来设置，具体地，挡板104与屏幕102之间的平面夹角可以在预设角度范围内，例如，可以不小于第一夹角值(如20°)，且不大于第二夹角值(如160°)，第一夹角值与第二夹角值可自定义，例如，可以根据挡板104的高度来调节这两个夹角值的取值范围，本申请对此不做限定。作为一个示例，可参阅图3，图3中的(a)子示意图示意的是屏幕102四周的4块挡板104与屏幕102之间的平面夹角为90°，图3中的(b)子示意图示意的是屏幕102四周4块挡板104与屏幕102之间的平面夹角为120°。
这里需要注意的是，图3示意的是屏幕102四周的4块挡板104与屏幕102之间的平面夹角的值均相同，在一些应用场景中，4块挡板104各自与屏幕102之间的平面夹角也可以不同，例如，互为对面的2块挡板104与屏幕102的平面夹角可以是60°，另外2块互为对面的挡板104与屏幕102的平面夹角可以是120°，具体本申请对每块挡板104与屏幕102的平面夹角的具体取值不做限定。
还需要注意的是，在本申请的一些事实施方式中，挡板104的高度除了可以根据屏幕支架103的大小来设置，也可以根据挡板104与屏幕102的平面夹角的取值大小来设置。作为一种示例，当该平面夹角为90°时，挡板104的高度可以设置的低一些，当平面夹角在20°至90°之间时，挡板104的高度与平面夹角的取值大小成反相关关系(即平面夹角越大，高度越低)，当平面夹角在90°至160°之间时，挡板104的高度与平面夹角的取值大小成正相关关系(即平面夹角越大，高度越高)。
为了对本申请实施例所带来的有益效果有更为直观的认识，以下对本申请实施例所带来的技术效果作进一步的对比，请参阅图4，图4为屏幕支架103阳光倒灌的能量仿真结果对比图，其中，图4中的(a)、(b)示意图的横坐标和纵坐标的单位均为毫米，图4中的(a)示意图为未加挡板的情形，在未加挡板的情况下，屏幕支架的入射功率为2.6W，最大功率密度为10609W/m 2；图4中的(b)示意图为加了挡板的情形，在加了挡板的情况下，屏幕支架的入射功率为0.04W，最大功率密度为3607W/m 2。由此可知，加了挡板的显示设备，屏幕支架上不管是入射功率还是最大功率密度都大大降低了。
在部署有显示设备的相关产品中，阳光直射到显示设备的结构件上除了会使得结构件过热之外，阳光直射到显示设备的内部镜子(如HUD的曲面镜)或者结构件反射回来的光线被人眼看到还会在视野内形成一个白斑(即眩光)，从而影响用户体验(如影响驾驶)。为了减少眩光的影响，在本申请的一些实施方式中，还可以通过在屏幕上方增加小角度滤光片、偏振膜与1/4膜等方式来消除眩光，这两种方式会减少大部分入射到屏幕被反射的眩光，下面分别进行介绍：
一、在屏幕上方增加出射角度在预设阈值范围内的滤光片
具体可参阅图5，在图5中，依然以显示设备为HUD为例进行示意，在本申请实施例中，可以通过在显示设备的屏幕102上方增加出射角度在预设阈值范围(如出射角度在±5°)内的滤光片107，用于通过出射角度在所述预设阈值范围内的光束，该光束是由图像生成装置101向该滤光片107传播。在本申请实施例中，预设阈值范围可以设置的比较小，因此，本申请使用的滤光片也可以称为小角度滤光片，即该滤光片只允许一个小角度范围内的光束从滤光片射出，比如±5°的光束，更大角度的光束则不能通过。而本申请中图像生成装置101生成的成像光都属于小角度光束，可以通过该滤光片107，太阳直射屏幕102后由于反射形 成的大角度的眩光则无法通过该滤光片107，这样可以在很大程度上减少太阳眩光。需要注意的是，本申请对所使用的滤光片的类型不做限定。
需要说明的是，图5由于是以HUD为例进行的示意，因此其具有第一曲面镜105和第二曲面镜106，为了防止镜面反射，滤光片107可以与屏幕102呈一定夹角设置，也就是滤光片107与屏幕102之间的夹角大于零(即两者不平行)。
需要注意的是，在本申请实施例中，滤光片107与屏幕102之间呈一定夹角设置，可以是如图5中的倾斜方式，也可以是如图6所示的倾斜方式，且倾斜角度(即夹角)可根据具体的应用场景进行设置，本申请对此不做限定。
还需要注意的是，图5是以HUD为例，在本申请的另一些实施方式中，显示设备也可以不需要第一曲面镜105、第二曲面镜106以及防尘罩等模块，或者，根据应用需求增减其他的一些模块，本申请对此不做限定，但图像生成装置101、屏幕102、屏幕支架103以及滤光片107是必须具有的模块。
还需要注意的是，在图5中，滤光片107是部署在挡板104上方(即挡板104作为滤光片107的支撑结构件)的，即是通过“挡板104+滤光片107”的组合方式，实现防止屏幕支架103过热和防太阳眩光的功能；而在本申请的另一些实施方式中，滤光片107可以单独部署，即不部署在挡板104上方，而是通过额外的支撑结构件(如4个支架)支撑，即只通过“滤光片107”，实现防太阳眩光的功能。在实际应用中，可以根据功能需求进行方案选择，本申请对此不做限定。
二、在屏幕上方增加偏振膜和1/4膜
在本申请实施例中，还可以利用偏振膜和1/4膜的组合来消除眩光。具体地，偏振膜和1/4膜均位于屏幕上方，其中，偏振膜，用于透射S偏振光，且抵挡P偏振光透射，即偏振膜透射S偏振光，不透射P偏振光(即P偏振光无法从偏振膜射出)；1/4膜，用于在S偏振光第二次经过时，将S偏振光变为P偏振光，也就是说，S偏振光经过两次1/4膜后变成P偏振光。在本申请实施例中，偏振膜和1/4膜具体的设置方式可以包括但不限于如下方式：
(1)偏振膜和1/4膜在屏幕上方。
具体可参阅图7(以HUD为例)，通过在屏幕102上方直接加偏振膜108和1/4膜109，且偏振膜108是在1/4膜109的上方，这里需要注意的是，在这种情况下，偏振膜108和1/4膜109是贴在一起的，图7是为了示意其工作原理，所以绘制偏振膜108和1/4膜109时中间是隔开画的，其中，偏振膜108和1/4膜109可以是完全紧密贴合在一起，中间不留空隙；偏振膜108和1/4膜109也可以是中间留有空隙(如通过玻璃隔开)，具体本申请对此不做限定。阳光(包括图8中虚线所示的P偏振光和实线所示的S偏振光)经过偏振膜108后，透射S偏振光，S偏振光经过两次1/4膜109后变成P偏振光，由于P偏振光无法从偏振膜108出射，从而降低了眩光风险。
还需要注意的是，在本申请实施例中，1/4膜109可以贴在屏幕102(在图7中为了便于阐述原理，画的是两者呈平行)上，也可以独立部署，但需保证从偏振膜108透射过来的S偏振光不是垂直入射到1/4膜109上，这是为了避免光线前后经过偏振片和1/4膜的角度不一致时会偏振态转换不完全、容易有杂光的问题。
还需要说明的是，上述所述的偏振膜108是透射S偏振光、阻P偏振光；在本申请的另一些实施方式中，也可以采用透射P偏振光、阻S偏振光的偏振膜，在这种情况下，图7中虚线所示的就是S偏振光，实线所示的就是P偏振光，其余过程是类似的，此处不予赘述。
类似地，图7也是以HUD为例，在本申请的另一些实施方式中，显示设备也可以不需要第一曲面镜105、第二曲面镜106以及防尘罩等模块，或者，根据应用需求增减其他的一些模块，本申请对此不做限定，但图像生成装置101、屏幕102、屏幕支架103以及偏振膜108、1/4膜109是必须具有的模块。
(2)偏振膜部署于防尘罩上，1/4膜在屏幕上方。
具体可参阅图8(以HUD为例)，在本申请实施例中，偏振膜108是部署于在防尘罩上(如图8中与防尘罩贴合在一起的双虚线所示)，部署有偏振膜108的防尘罩可称为偏振防尘罩(在HUD中，防尘罩是位于曲面镜上方的，因此，部署有偏振膜108的防尘罩也是位于屏幕102上方)，1/4膜109在屏幕102上方(如贴在屏幕102上或独立部署)，当太阳光入射偏振防尘罩后只有S偏振光可以通过，S偏振光再经过两次1/4膜变成P偏振光，无法再从偏振防尘罩通过，因此可以减小眩光。
同样地，上述所述的偏振膜108是透射S偏振光、阻P偏振光；在本申请的另一些实施方式中，也可以采用透射P偏振光、阻S偏振光的偏振膜，在这种情况下，图8中虚线所示的就是S偏振光，实线所示的就是P偏振光，其余过程是类似的，此处不予赘述。
需要说明的是，本申请上述两种方式是偏振膜和1/4膜典型的两种设置方式，在本申请的另一些实施方式中，作为一种示例，1/4膜109也可以与偏振膜108贴合在一起形成组合膜，再将组合膜设置在防尘罩上，本申请对偏振膜108和1/4膜109的具体设置位置不做限定。
类似地，在图7或图8中，除了偏振膜108和1/4膜109，也还有挡板104，挡板104可以作为1/4膜109(或偏振108和1/4膜109的组合膜)的支撑结构件，即是通过“挡板104+偏振膜108和1/4膜109”的组合方式，实现防止屏幕支架103过热和防太阳眩光的功能；而在本申请的另一些实施方式中，偏振膜108和1/4膜109可以单独部署，即不需要挡板104，只通过“偏振膜108和1/4膜109”，实现防太阳眩光的功能。在实际应用中，可以根据功能需求进行方案选择，本申请对此不做限定。
还需要注意的是，在本申请的另一些实施方式中，为了加强防眩光的功能，还可以通过“挡板104+滤光片107+偏振膜108和1/4膜109”的组合方式，实现防止屏幕支架103过热和更好的防太阳眩光的功能；或者，也可以通过“滤光片107+偏振膜108和1/4膜109”的组合方式，单独实现更好的防太阳眩光的功能。其中，挡板104、滤光片107、偏振膜108和1/4膜109的设置方式与上述单独部署的过程类似，在实际应用中，只需进行组合使用即可，具体可参阅上述描述，此处不予赘述。
由于智能终端、智能驾驶等领域中都可以用到本申请实施例提供的显示设备来进行图像显示，下面对多个落地到产品的应用场景进行介绍。
(1)显示设备为HUD
在一种可能的应用场景中，本申请实施例提供的显示设备可以是HUD，HUD可以将导航信息、仪表信息等投射在驾驶员的前方视野范围，避免驾驶员低头查看这些信息，从而影响驾驶安全。HUD投射的图像经过挡风玻璃反射后，在交通工具外部形成虚像。其中，HUD的类型包括但不限于风挡(windshield，W)-HUD、增强现实抬头显示(AR-HUD)等。驾驶员在驾驶交通工具过程中，阳光直射到HUD内部曲面镜或者结构件反射回来的光线被驾驶员人眼看到会在视野内形成白斑，从而影响驾驶。因此，本申请实施例提供的HUD，可以减少眩光的影响，例如，本申请实施例的偏振膜与1/4膜、挡板和/或小角度滤光片可以设置在日本精机提出的一种双凹架构的HUD中，以提高HUD使用寿命和/或减小眩光影响。
(2)显示设备为投影仪
在一种可能的应用场景中，本申请实施例提供的显示设备可以是投影仪，投影仪可以将图像投影到墙面或投影屏幕上。在一些特殊的使用场景中，如在户外野营、团建等场景，用户在观看过程中，阳光直射到投影仪内部结构件反射回来的光线被人眼看到会在视野内形成白斑，从而影响观看体验。因此，本申请实施例提供的投影仪，同样可以减少眩光的影响。
(3)显示设备为近眼显示(near display，NED)设备
在一种可能的应用场景中，本申请实施例提供的显示设备可以是NED设备，NED设备可以是AR设备或VR设备，AR设备可以包括但不限于AR眼镜、AR头盔，VR设备可以包括但不限于VR眼镜、VR头盔。以AR眼镜为例，用户可佩戴AR眼镜进行游戏、观看视频、参加虚拟会议等。在一些使用场景中，如在户外进行游戏的场景中，用户在使用该AR眼镜的过程中，阳光直射到AR眼镜内部结构件反射回来的光线被人眼看到会在视野内形成白斑，从而影响观看体验。因此，本申请实施例提供的NED设备，同样可以减少眩光的影响，提升用户体验。
需要说明的是，本申请所述的显示设备不仅可以应用于上述所述的应用场景中，还可以应用在显示领域的各个细分领域中，此处不再举例示意。
本申请实施例还提供了一种交通工具，该交通工具安装有前述任意一种显示设备。图9为本申请实施例提供显示设备901安装在交通工具的示意图。交通工具的挡风玻璃可以作为曲面镜或透镜。当挡风玻璃作为曲面镜时，显示设备901和驾驶员或乘客位于挡风玻璃的同一侧。当挡风玻璃作为透镜时，显示设备901和驾驶员或乘客位于挡风玻璃的不同侧。显示设备901用于输出成像光。挡风玻璃用于反射或透射成像光，形成虚像。虚像位于挡风玻璃的一侧，驾驶员或乘客位于挡风玻璃的另一侧。反射或透射后的成像光分别照射至驾驶员或乘客的双眼。
示例性的，交通工具可以为轿车、卡车、摩托车、公共汽车、船、飞机、直升飞机、割草机、娱乐车、游乐场车辆、施工设备、电车、高尔夫球车、火车、和手推车等，本申请实施例不作特别的限定。显示设备901可以安装于交通工具的仪表板(instrument panel，IP)台上，位于副驾位置或主驾位置，也可以安装在座椅后背。上述显示设备901应用在交通工具时可以称为HUD，可以用于显示导航信息、车速、电量/油量等。
图10是本申请实施例提供的交通工具的一种可能的功能框架示意图。如图10所示，交通工具的功能框架中可包括各种子系统，例如，图示中的控制系统14、传感器系统12、一个或多个外围设备16(图示以一个为例示出)、电源18、计算机系统20、显示系统32。可选地，交通工具还可包括其他功能系统，例如，为交通工具提供动力的引擎系统等等，本申请这里不做限定。
其中，传感器系统12可包括若干检测装置，这些检测装置能感受到被测量的信息，并将感受到的信息按照一定规律将其转换为电信号或者其他所需形式的信息输出。如图示出，这些检测装置可包括全球定位系统(global positioning system，GPS)、车速传感器、惯性测量单元(inertial measurement unit，IMU)、雷达单元、激光测距仪、摄像装置、轮速传感器、转向传感器、档位传感器、或者其他用于自动检测的元件等等，本申请并不做限定。
控制系统14可包括若干元件，例如图示出的转向单元、制动单元、照明系统、自动驾驶系统、地图导航系统、网络对时系统和障碍规避系统。可选地，控制系统14还可包括诸如用于控制车辆行驶速度的油门控制器及发动机控制器等元件，本申请不做限定。
外围设备16可包括若干元件，例如图示中的通信系统、触摸屏、用户接口、麦克风以及扬声器等等。其中，通信系统用于实现交通工具和除交通工具之外的其他设备之间的网络通 信。在实际应用中，通信系统可采用无线通信技术或有线通信技术实现交通工具和其他设备之间的网络通信。该有线通信技术可以是指车辆和其他设备之间通过网线或光纤等方式通信。
电源18代表为车辆提供电力或能源的系统，其可包括但不限于再充电的锂电池或铅酸电池等。在实际应用中，电源中的一个或多个电池组件用于提供车辆启动的电能或能量，电源的种类和材料本申请并不限定。
交通工具的若干功能均由计算机系统20控制实现。计算机系统20可包括一个或多个处理器2001(图示以一个处理器为例示出)和存储器2002(也可称为存储装置)。在实际应用中，该存储器2002也在计算机系统20内部，也可在计算机系统20外部，例如作为交通工具中的缓存等，本申请不做限定。其中，
关于处理器2001的描述，可以参考前述处理器1001的描述。处理器2001可包括一个或多个通用处理器，例如，图形处理器(graphic processing unit，GPU)。处理器2001可用于运行存储器2002中存储的相关程序或程序对应的指令，以实现车辆的相应功能。
存储器2002可以包括易失性存储器(volatile memory)，例如，RAM；存储器也可以包括非易失性存储器(non-volatile memory)，例如，ROM、快闪存储器(flash memory)或固态硬盘(solid state drives，SSD)；存储器2002还可以包括上述种类的存储器的组合。存储器2002可用于存储一组程序代码或程序代码对应的指令，以便于处理器2001调用存储器2002中存储的程序代码或指令以实现车辆的相应功能。该功能包括但不限于图13所示的车辆功能框架示意图中的部分功能或全部功能。本申请中，存储器2002中可存储一组用于车辆控制的程序代码，处理器2001调用该程序代码可控制车辆安全行驶，关于如何实现车辆安全行驶具体在本申请下文详述。
可选地，存储器2002除了存储程序代码或指令之外，还可存储诸如道路地图、驾驶线路、传感器数据等信息。计算机系统20可以结合车辆功能框架示意图中的其他元件，例如传感器系统中的传感器、GPS等，实现车辆的相关功能。例如，计算机系统20可基于传感器系统12的数据输入控制交通工具的行驶方向或行驶速度等，本申请不做限定。
显示系统32可包括若干元件，例如，控制器和前文中描述的显示设备901。控制器用于根据用户指令生成图像(如生成包含车速、电量/油量等车辆状态的图像以及增强现实AR内容的图像)，并将该图像内容发送至显示设备901。显示设备901中的图像生成装置用于输出携带图像信息的成像光。挡风玻璃用于反射或透射成像光，以使在驾驶员或乘客的前方呈现图像内容对应的虚像。需要说明的是，显示系统32中的部分元件的功能也可以由车辆的其它子系统来实现，例如，控制器也可以为控制系统14中的元件。
其中，本申请图10示出包括四个子系统，传感器系统12、控制系统14、计算机系统20和显示系统32仅为示例，并不构成限定。在实际应用中，交通工具可根据不同功能对车辆中的若干元件进行组合，从而得到相应不同功能的子系统。在实际应用中，交通工具可包括更多或更少的系统或元件，本申请不做限定。
在本说明书的描述中，具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (12)

  1. 一种显示设备，其特征在于，包括：
    图像生成装置、屏幕、屏幕支架以及挡板；
    所述图像生成装置，用于生成携带图像信息的成像光，并将所述成像光发送至所述屏幕；
    所述屏幕，用于显示所述成像光；
    所述屏幕支架，用于支撑所述屏幕；
    所述挡板，位于所述屏幕的周围，用于抵挡到达所述屏幕支架的杂散光。
  2. 根据权利要求1所述的设备，其特征在于，所述挡板的性质包括：
    耐高温材质。
  3. 根据权利要求1-2中任一项所述的设备，其特征在于，所述挡板所处平面与所述屏幕所处平面之间的夹角在预设角度范围内。
  4. 根据权利要求1-3中任一项所述的设备，其特征在于，所述设备还包括：
    滤光片；
    所述滤光片位于所述屏幕上方，用于通过出射角度在所述预设阈值范围内的光束，所述光束由所述图像生成装置向所述滤光片传播。
  5. 根据权利要求4所述的设备，其特征在于，所述滤光片与所述屏幕之间的夹角大于零。
  6. 根据权利要求1-5中任一项所述的设备，其特征在于，所述设备还包括：
    位于所述屏幕同一侧的偏振膜以及1/4膜，其中，阳光依次射入所述偏振膜、所述1/4膜以及所述屏幕；
    所述偏振膜，用于透射S偏振光，且抵挡P偏振光透射；
    所述1/4膜，用于透射所述S偏振光，使得透射的S偏振光经所述屏幕反射后再次经由所述1/4膜时变为P偏振光。
  7. 根据权利要求1-5中任一项所述的设备，其特征在于，所述设备还包括：
    防尘罩、位于所述防尘罩上的偏振膜以及位于所述屏幕上的1/4膜，其中，阳光依次射入所述防尘罩、所述偏振膜、所述1/4膜以及所述屏幕；
    所述偏振膜，用于透射S偏振光，且抵挡P偏振光透射；
    所述1/4膜，用于透射所述S偏振光，使得透射的S偏振光经所述屏幕反射后再次经由所述1/4膜后变为P偏振光。
  8. 根据权利要求1-5中任一项所述的设备，其特征在于，所述设备还包括：
    防尘罩、位于所述防尘罩上的偏振膜以及位于所述屏幕上的1/4膜，其中，阳光依次射入所述偏振膜、所述防尘罩、所述1/4膜以及所述屏幕；
    所述偏振膜，用于透射S偏振光，且抵挡P偏振光透射；
    所述1/4膜，用于透射所述S偏振光，使得透射的S偏振光经所述屏幕反射后再次经由所述1/4膜后变为P偏振光。
  9. 根据权利要求1-5中任一项所述的设备，其特征在于，所述设备还包括：
    防尘罩、曲面镜、位于所述曲面镜上的偏振膜以及位于所述屏幕上的1/4膜，其中，阳光依次射入所述防尘罩、所述偏振膜、所述曲面镜、所述1/4膜以及所述屏幕；
    所述偏振膜，用于透射S偏振光，且抵挡P偏振光透射；
    所述1/4膜，用于透射所述S偏振光，使得透射的S偏振光经所述屏幕反射后再次经由 所述1/4膜后变为P偏振光。
  10. 根据权利要求9所述的设备，其特征在于，所述曲面镜包括：
    第一曲面镜以及第二曲面镜；
    所述第一曲面镜以及所述第二曲面镜，用于依次反射所述成像光。
  11. 一种交通工具，其特征在于，包括如权利要求1-10中任一项所述的显示设备，所述显示设备安装在所述交通工具上。
  12. 如权利要求11所述的交通工具，其特征在于，所述交通工具还包括：
    反射元件，所述显示设备用于向所述反射元件投射所述成像光，所述反射元件用于反射所述成像光，形成虚像。
PCT/CN2022/126614 2022-08-09 2022-10-21 一种显示设备及交通工具 WO2024031837A1 (zh)

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US20180356632A1 (en) * 2017-06-12 2018-12-13 Panasonic Intellectual Property Management Co., Ltd. Image display device
JP2019008265A (ja) * 2017-06-20 2019-01-17 パナソニックＩｐマネジメント株式会社 画像表示装置
CN109597208A (zh) * 2019-01-31 2019-04-09 延锋伟世通电子科技（上海）有限公司 一种车载抬头显示器消除杂散光结构
CN112444982A (zh) * 2019-09-02 2021-03-05 未来（北京）黑科技有限公司 一种抬头显示设备

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180356632A1 (en) * 2017-06-12 2018-12-13 Panasonic Intellectual Property Management Co., Ltd. Image display device
JP2019008265A (ja) * 2017-06-20 2019-01-17 パナソニックＩｐマネジメント株式会社 画像表示装置
CN109597208A (zh) * 2019-01-31 2019-04-09 延锋伟世通电子科技（上海）有限公司 一种车载抬头显示器消除杂散光结构
CN112444982A (zh) * 2019-09-02 2021-03-05 未来（北京）黑科技有限公司 一种抬头显示设备

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