CN115629475A - Display device and vehicle - Google Patents
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- CN115629475A CN115629475A CN202211204277.7A CN202211204277A CN115629475A CN 115629475 A CN115629475 A CN 115629475A CN 202211204277 A CN202211204277 A CN 202211204277A CN 115629475 A CN115629475 A CN 115629475A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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- 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
- B60R11/0229—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for displays, e.g. cathodic tubes
- B60R11/0235—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for displays, e.g. cathodic tubes of flat type, e.g. LCD
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- 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
- B60R2011/0001—Arrangements for holding or mounting articles, not otherwise provided for characterised by position
- B60R2011/0003—Arrangements for holding or mounting articles, not otherwise provided for characterised by position inside the vehicle
- B60R2011/0012—Seats or parts thereof
- B60R2011/0015—Back-rests
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- 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
- G02B2027/012—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility comprising devices for attenuating parasitic image effects
Abstract
The application discloses display device and vehicle belongs to and shows technical field. The display device includes an image generation unit, an imaging unit, and a polarization transmission unit. The image generation unit is used for providing a light beam, the light beam carries image information, and the light beam is linearly polarized light with a first polarization direction. The imaging unit is used for converting at least part of the light beam into linearly polarized light with a second polarization direction, and forming a virtual image based on the linearly polarized light with the second polarization direction, wherein the second polarization direction is crossed with the first polarization direction. The polarization transmission unit is located on a viewing path of the virtual image. The polarization transmission unit is configured to transmit at least part of the linearly polarized light of the second polarization direction and block the linearly polarized light of the first polarization direction. According to the method and the device, the user can be prevented from seeing the two display pictures at the same time, and the display effect is improved.
Description
This application is a divisional application, with the original application having application number 202210114724.3 and the original application date 2022, month 01 and 30, the entire contents of which are incorporated herein by reference.
Technical Field
The application relates to the technical field of display, in particular to a display device and a vehicle.
Background
As display technologies have been developed, display devices for displaying virtual images are increasingly used.
In the related art, a display device includes an image generation unit and an imaging unit. The image generation unit provides a light beam carrying image information, and the imaging unit forms a virtual image based on the light beam. The user can see the virtual image at the appropriate location.
When the display device displays a virtual image, the user can view the virtual image and an image provided by the image generating unit at the same time, affecting the display effect.
Disclosure of Invention
The application provides a display device and a vehicle, which can prevent a user from seeing two display pictures simultaneously and improve the display effect.
In one aspect, the present application provides a display device including an image generating unit, an imaging unit, and a polarization transmission unit. The image generation unit is used for providing a light beam, the light beam carries image information and is linearly polarized light with a first polarization direction. The imaging unit is used for converting at least part of the light beam into linearly polarized light with a second polarization direction, and forming a virtual image based on the linearly polarized light with the second polarization direction, wherein the second polarization direction is intersected with the first polarization direction. The polarization transmission unit is positioned on a viewing path of the virtual image. The polarization transmission unit is configured to transmit at least part of the linearly polarized light of the second polarization direction and block the linearly polarized light of the first polarization direction.
When the image generating unit emits the light beam carrying the image information, the light beam is linearly polarized light with the first polarization direction, so that the light beam is blocked by the polarization transmission unit. When the user watches the virtual image, the light beam provided by the image generation unit cannot be incident on human eyes, so that the image displayed by the image generation unit cannot be seen. And the virtual image formed after the light beam provided by the image generation unit passes through the imaging unit corresponds to linearly polarized light with a second polarization direction, and at least part of the linearly polarized light with the second polarization direction can penetrate through the polarization transmission unit, so that a user can see the virtual image through the polarization transmission unit. Therefore, when the user views the virtual image, the image formed by the image generation unit and the virtual image formed by the imaging unit cannot be seen at the same time, the image formed by the image generation unit cannot interfere with the virtual image, and the display effect of the display device is improved.
In the embodiment of the present application, the polarization transmission unit is located at one side of the image generation unit and the imaging unit, and is located at both sides of the imaging unit together with the virtual image. This allows the polarization transmission unit to be arranged in the viewing path of the virtual image and to be used to block light emitted by the image generation unit.
In the embodiment of the present application, the manner of blocking the linearly polarized light in the first polarization direction includes, but is not limited to, absorbing the linearly polarized light in the first polarization direction or filtering out the linearly polarized light in the first polarization direction.
In some examples, the first polarization direction is perpendicular to the second polarization direction. For example, linearly polarized light of the first polarization direction is p light, and linearly polarized light of the second polarization direction is s light. For another example, the linearly polarized light of the first polarization direction is s-light, and the linearly polarized light of the second polarization direction is p-light. Therefore, the polarization transmission unit can basically allow all linearly polarized light in the second polarization direction to transmit, and the utilization rate of light is improved. In other examples, the first polarization direction and the second polarization direction may form an angle different from 90 degrees, so that the linearly polarized light of the second polarization direction can partially transmit through the polarization transmission unit.
In addition, under the condition that the first polarization direction is perpendicular to the second polarization direction, when the image generation unit does not work (i.e., does not emit light), ambient light of an environment where the display device is located enters the display device through the polarization transmission unit, and the polarization transmission unit is configured to transmit linearly polarized light in the second polarization direction and filter out the linearly polarized light in the first polarization direction, so that the light entering the display device is linearly polarized light in the second polarization direction. Linearly polarized light of the second polarization direction passes through the imaging unit, and a part of the linearly polarized light is directly reflected to the polarization transmission unit by the imaging unit, but is not easily felt by a user because the light intensity is weak. The other part is converted into linearly polarized light of the first polarization direction by the imaging unit, and then the linearly polarized light of the first polarization direction is guided to the image generating unit. The linearly polarized light of the first polarization direction may be blocked by the polarization projection unit if directly incident to the polarization transmission unit. And the linearly polarized light in the first polarization direction is converted into linearly polarized light in a second polarization direction after passing through the imaging unit again, and then is emitted out of the polarization transmission unit. However, since the light intensity of this part of light is weak, it is not easy for the user to feel. Therefore, the user can hardly see the image generation unit and the imaging unit behind the polarization transmission unit under the shielding of the polarization transmission unit.
In a possible embodiment, the imaging unit comprises a plurality of mirrors, which are arranged in sequence on the propagation path of the light beam. The plurality of mirrors are used not only to change the direction of propagation of the light beam, but also to change the polarization direction of the light beam. And, on the propagation path of the light beam, one of the mirrors closest to the polarization transmission unit is also used to form the virtual image. The imaging unit is formed by a plurality of reflectors, so that the structure is simple and the cost is low.
In some examples, there is at least one first mirror and M second mirrors in the plurality of mirrors. Wherein M is an odd number. The polarization direction of emergent light of the first reflector is the same as that of incident light of the first reflector. The polarization direction of emergent light of the second reflector is vertical to the polarization direction of incident light of the second reflector. One of the second mirrors closest to the polarization transmission unit is used to form the virtual image on a propagation path of the light beam. Through the reasonable arrangement of the positions of the plurality of reflectors, the polarization direction conversion of the light beams and the design of the propagation path of the light beams can be realized by utilizing the space light path, the attenuation degree of the light is small, and the improvement of the utilization rate of the light is facilitated.
In some examples, a propagation direction of outgoing light from the second mirror is perpendicular to an incident surface of a mirror located before the second mirror on a propagation path of the light beam. Thus, the polarization direction of the incident light of the second mirror is perpendicular to the polarization direction of the emergent light of the second mirror. Here, the mirror located before the second mirror in the propagation path of the light beam may be the first mirror or the second mirror.
In some examples, there is a first mirror in the plurality of mirrors to reflect the light beam from the image generation unit to the second mirror.
In other examples, there are at least two first mirrors in the plurality of mirrors. A first mirror is positioned after the image generating unit for reflecting the light beam from the image generating unit to a second mirror adjacent to the first mirror. The other first reflecting mirror is positioned between two adjacent second reflecting mirrors and is used for reflecting the light beam from the front second reflecting mirror of the two adjacent first reflecting mirrors to the back second reflecting mirror of the two adjacent first reflecting mirrors. With respect to the other first mirror here, the propagation direction of the outgoing light from the first mirror is parallel to the incident surface of the mirror located before the first mirror on the propagation path of the light beam. Here, the mirror located before the second mirror in the propagation path of the light beam may be the first mirror or the second mirror.
In some examples, the imaging unit includes the first mirror and the second mirror. The first mirror and the second mirror are sequentially located on a propagation path of the light beam provided by the image generating unit. The first mirror is used for reflecting the light beam provided by the image generating unit to the second mirror. The second mirror is used for coming from the first mirror the light beam reflection extremely polarization transmission unit, just the second mirror is used for forming the virtual image, the direction of propagation of the emergent light of second mirror with the incident plane of first mirror is perpendicular. The two reflectors simultaneously realize the conversion of the polarization direction and the formation of a virtual image, the structure is simple, and the reduction of the size of the display device and the further cost reduction are facilitated.
In some examples, the first mirror and the image generation unit are both located on the light exit side of the second mirror (i.e., the side facing the polarization transmission unit), and the first mirror and the image generation unit are at least partially opposed in any direction perpendicular to the light exit direction of the second mirror. The off-axis degree of the second reflector and the first reflector is small, and the angle of field of the display device is increased beneficially.
In another possible embodiment, the imaging unit includes: a polarization direction conversion structure and an imaging structure. The polarization direction conversion structure is used for converting the light beam into linearly polarized light with a second polarization direction. The imaging structure is used for forming a virtual image based on the linearly polarized light in the second polarization direction emitted by the polarization direction conversion structure.
In some examples, the polarization direction converting structure includes a plurality of mirrors. The plurality of mirrors are sequentially arranged on a propagation path of the light beam. There is at least one first mirror and M second mirrors in the plurality of mirrors, wherein M is an odd number. The polarization direction of emergent light of the first reflector is the same as that of incident light of the first reflector. The polarization direction of emergent light of the second reflector is perpendicular to the polarization direction of incident light of the second reflector. Through the reasonable arrangement of the positions of the plurality of reflectors, the polarization direction conversion of the light beams and the design of the propagation path of the light beams can be realized by utilizing the space light path, the attenuation degree of the light is small, and the improvement of the utilization rate of the light is facilitated.
In other examples, the polarization direction conversion structure includes a polarization conversion device configured to transmit the linearly polarized light in the second polarization direction, and convert the linearly polarized light in a third polarization direction into the linearly polarized light in the second polarization direction and emit the linearly polarized light in the second polarization direction together. The third polarization direction is perpendicular to the second polarization direction.
In some examples, the imaging structure is a reflective imaging element, e.g., a curved mirror or the like. In other examples, the imaging structure is a transmissive imaging element, such as a lens or a lens assembly of lenses. When the imaging structure employs a transmissive imaging element, the display device is a Virtual Reality (VR) device, and when the imaging structure employs a lens, the display device is an Augmented Reality (AR) device.
In some examples, the polarization transmission unit includes a polarizer (also called a polarizer) having a polarization direction perpendicular to the first polarization direction. The polarization transmission unit is realized by adopting a polaroid, so that the structure is simplified and the cost is reduced.
In other examples, the polarization transmission unit includes a liquid crystal panel configured to transmit at least a portion of the linearly polarized light of the second polarization direction and to absorb the linearly polarized light of the first polarization direction.
Optionally, the virtual image is a three-dimensional image or a two-dimensional image. When the virtual image is a three-dimensional image, the light beam provided by the image generating unit is three-dimensional image light. When the virtual image is a two-dimensional image, the light beam provided by the image generating unit is two-dimensional image light.
Optionally, the display device further comprises a housing. The housing has an observation window, and the polarization transmission unit is disposed on, e.g., covers, the observation window. The image generation unit and the imaging unit are both located within the housing. The housing may protect the respective units and integrate the respective units together through the housing to facilitate the overall movement of the display device.
Optionally, the display device further comprises a main processor. The main processor is configured to send image data to the image generation unit, and the image generation unit is configured to provide image light based on the received image data.
In some examples, the display device further includes a power supply to power the main processor and the image generation unit.
In some examples, the display device is a desktop display device, such as a monitor and a television.
In yet another aspect, the present application provides a vehicle comprising any of the display devices described above. The display device is mounted on the vehicle. Illustratively, vehicles include, but are not limited to, automobiles, airplanes, trains, or ships, and the like.
Drawings
Fig. 1 is a schematic view illustrating a usage state of a display device according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram illustrating a usage status of another display device according to an embodiment of the present disclosure;
FIG. 3 is a schematic view illustrating a usage status of another display device provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of another display device provided in an embodiment of the present application;
FIG. 6 is a schematic view of another angle of the display device shown in FIG. 5;
fig. 7 is a schematic partial structure diagram of another display device provided in an embodiment of the present application;
fig. 8 is a schematic partial structure diagram of another display device provided in an embodiment of the present application;
fig. 9 is a schematic partial structure diagram of another display device provided in an embodiment of the present application;
fig. 10 is a schematic partial structure diagram of another display device provided in an embodiment of the present application;
fig. 11 is a schematic structural diagram of a polarization direction conversion device provided in an embodiment of the present application;
fig. 12 is a functional schematic diagram of a vehicle according to an embodiment of the present application.
Detailed Description
The display device provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The display device may be used for office use as a normal display (e.g., 100a in fig. 1), home entertainment (e.g., television) as a television (e.g., 100b in fig. 2), or for in-vehicle display (e.g., 100c in fig. 3, the display device being mounted on a seat of a vehicle). The physical size, display size and resolution of the display device can be adjusted according to the use scene. In the present application, the display device may also be referred to as a display system or a virtual image display device.
Fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present application. As shown in fig. 4, the display device includes: an image generation unit 110, an imaging unit 120, and a polarization transmission unit 130. The image generation unit 110 is configured to provide a light beam, which carries image information and is linearly polarized light (which may be referred to as image light) with a first polarization direction. The imaging unit 120 is configured to convert at least part of the light beam into linearly polarized light having a second polarization direction, and form a virtual image based on the linearly polarized light of the second polarization direction, the second polarization direction intersecting the first polarization direction. The polarization transmission unit 130 is located on a viewing path of the virtual image. The polarization transmission unit 130 is configured to transmit at least part of the linearly polarized light of the second polarization direction and block the linearly polarized light of the first polarization direction.
In the embodiment of the present application, the image generation unit 110 may also be referred to as an image source, and is used for generating a real image. The imaging unit 120 generates an enlarged virtual image by imaging from the received real image.
In the embodiment of the present application, the manner of blocking the linearly polarized light with the first polarization direction by the polarization transmission unit 130 includes, but is not limited to, absorbing and/or filtering the linearly polarized light with the first polarization direction.
When the image generating unit emits the light beam carrying the image information, the light beam is linearly polarized light having the first polarization direction, and thus may be blocked by the polarization transmission unit 130. When the user views the virtual image, the light beam provided by the image generation unit 110 is not directly incident to human eyes, so that the user does not see the image displayed by the image generation unit 110. And the virtual image formed by the light beam provided by the image generating unit 110 after passing through the imaging unit 120 corresponds to linearly polarized light having a second polarization direction, at least a part of which is capable of transmitting through the polarization transmission unit 130, so that the user can see the virtual image through the polarization transmission unit 130. Therefore, when viewing the virtual image, the user does not see the image formed by the image generation unit 110 and the virtual image formed by the imaging unit 120 at the same time, the image formed by the image generation unit 110 does not interfere with the virtual image, and the display effect of the display device is improved.
In some examples, the first polarization direction is perpendicular to the second polarization direction. In this way, the polarization transmission unit 130 can allow all the linearly polarized light in the second polarization direction to transmit, and the utilization rate of the light is improved. For example, linearly polarized light of the first polarization direction is p light, and linearly polarized light of the second polarization direction is s light. For example, the linearly polarized light of the first polarization direction is s-light, and the linearly polarized light of the second polarization direction is p-light. In other examples, the first polarization direction may be at an angle different from 90 degrees, for example, at an angle of 80 degrees, so that the linearly polarized light of the second polarization direction can partially pass through (transmit) the polarization transmission unit 130.
In addition, in the case where the first polarization direction is perpendicular to the second polarization direction, when the image generating unit 110 does not operate (i.e., does not emit light), ambient light of an environment in which the display device is located is incident into the display device through the polarization transmitting unit, and since the polarization transmitting unit 130 is configured to transmit the linearly polarized light in the second polarization direction and block the linearly polarized light in the first polarization direction, the light incident into the display device is linearly polarized light in the second polarization direction. Linearly polarized light of the second polarization direction passes through the imaging unit 120, and a portion is directly reflected to the polarization transmission unit 130 by the imaging unit 120, but is not easily felt by the user because the light intensity is weak. The other portion is converted into linearly polarized light of the first polarization direction by the imaging unit 120 and then the linearly polarized light of the first polarization direction is guided to the image generating unit 110. The image generation unit 110 reflects the received linearly polarized light of the first polarization direction, which would be blocked by the polarization projection unit 130 if directly incident to the polarization transmission unit 130. The linearly polarized light of the first polarization direction is converted into linearly polarized light of a second polarization direction after passing through the imaging unit 120 again, and then exits from the polarization transmission unit 130. However, since the light intensity of this part of light is weak, it is not easy for the user to feel. Therefore, the user may not substantially see the image generation unit 110 and the imaging unit 120 behind the polarization transmission unit 130 under the shielding of the polarization transmission unit 130.
Fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present application. Fig. 6 is a schematic view of another angle of the display device shown in fig. 5. As shown in fig. 5 and 6, the display device includes: an image generation unit 110, an imaging unit 120, a polarization transmission unit 130, and a case (housing) 140. The image generation unit 110 is configured to provide (generate) a light beam, which carries image information and is linearly polarized light B1 having a first polarization direction. The imaging unit 120 is configured to convert the light beam into linearly polarized light B2 having a second polarization direction, and form a virtual image based on the linearly polarized light B2 of the second polarization direction, the second polarization direction intersecting the first polarization direction. The polarization transmission unit 130 is located on a viewing path of the virtual image. The polarization transmission unit 130 is configured to transmit at least part of the linearly polarized light B2 of the second polarization direction and block the linearly polarized light B1 of the first polarization direction.
The housing 140 has an observation window opposite to the eyes of the user for the user to view the virtual image. The polarization transmission unit 130 is disposed at the observation window, and the image generation unit 110 and the imaging unit 120 are both located in the housing 140. In this way, the image generation unit 110 and the imaging unit 120 are both located on the same side of the polarization transmission unit 130, and the polarization transmission unit 130 is located on both sides of the imaging unit 120 with the virtual image, respectively, to arrange the polarization transmission unit 130 on the viewing path of the virtual image.
The case 140 may protect the respective units and integrate the respective units together through the case 140 to facilitate the overall movement of the display device. It should be noted that the shape of the housing 140 in fig. 5 is only an example, and the disclosure is not limited thereto. Also, when the display device is integrated in a large product, for example, a seat of a vehicle, the seat may be used to provide an accommodating chamber in which the image generating unit 110 and the imaging unit 120 are directly disposed, and the polarization transmission unit 130 is disposed at an opening of the accommodating chamber, so that the case 140 may be omitted.
The structure of the image generating unit 110 is not limited in the present application as long as the light beam carrying the image information and being linearly polarized light having the first polarization direction can be provided. Illustratively, the image generation unit 110 includes an optical machine (also called a Picture Generation Unit (PGU)). The light engine includes a light source for generating a light beam and a light modulator for modulating the light beam to form image light.
In some examples, the light engine employs a light source that emits linearly polarized light, and accordingly, the light beam output by the light modulator is also linearly polarized. In this case, the light beam output by the optical engine is the light beam provided by the image generation unit 110. In other examples, the light emitted from the light source of the optical engine is non-linearly polarized light (e.g., non-polarized light, elliptically polarized light, circularly polarized light, etc.), in which case, the image generating unit 110 further includes a polarization conversion device for converting the light beam output by the optical engine into linearly polarized light.
Optionally, in some examples, the image generation unit 110 includes a diffuser screen (not shown). The diffusion screen is used for receiving the light beam output by the light machine and diffusing the received light beam (for example, performing diffuse reflection on the received light beam), so that the imaging quality is improved.
Alternatively, when the light beam provided by the image generation unit 110 is a two-dimensional image light, the virtual image seen by the user is a two-dimensional image. Alternatively, when the light beam provided by the image generation unit 110 is a three-dimensional image light, the virtual image seen by the user is a three-dimensional image.
In the embodiment of the present application, the first polarization direction and the second polarization direction are perpendicular. In this way, the polarization transmission unit 130 can allow all linearly polarized light in the second polarization direction to transmit, and the utilization rate of light is improved.
In the present embodiment, the imaging unit 120 includes two mirrors. The two mirrors are a first mirror 121 and a second mirror 122, respectively. The first mirror 121 and the second mirror 122 are sequentially located on a propagation path of the light beam provided by the image generating unit 120. The first mirror 121 is used for reflecting the light beam provided by the image generating unit 120 to the second mirror 122. The polarization direction of the outgoing light from the first reflector 121 is the same as the polarization direction of the incoming light from the first reflector 121, that is, the first reflector 121 does not change the polarization direction of the light beam when reflecting the received light beam. The second mirror 122 is used to reflect the light beam from the first mirror 121 to the polarization transmission unit 130, and the second mirror 122 is used to form a virtual image. The polarization direction of the outgoing light from the second reflector 122 is perpendicular to the polarization direction of the incoming light from the second reflector 122, that is, the second reflector 122 converts the polarization direction of the received light beam by 90 degrees when reflecting the received light beam.
As shown in fig. 5, the propagation direction of the outgoing light from the second mirror 122 is perpendicular to the incident plane (the plane formed by the incident light and the normal of the medium interface) of the first mirror 121, so that the received linearly polarized light in the first polarization direction is converted into linearly polarized light B2 in the second polarization direction, and is incident on the polarization transmission unit 130, passes through the polarization transmission unit 130, and is incident on the eye of the user, thereby forming a virtual image. Here, the incident surface of the first mirror 121 is an optical surface on which the incident light of the first mirror 121 and a normal line corresponding to the incident light (i.e., a normal line at an intersection of the main optical axis of the incident light and the first mirror 121) are located. The incident surface of the first reflecting mirror 121 is coplanar with the optical surfaces of the first reflecting mirror 121 on which the incident light and the reflected light are located. Therefore, the propagation direction of the light emitted from the second reflecting mirror 122 is perpendicular to the optical surface on which the incident light and the reflected light of the first reflecting mirror 121 are located.
In this embodiment, the two mirrors simultaneously realize the conversion of the polarization direction and the formation of the virtual image, and the number of the constituent devices of the imaging unit 120 is small, so that the structure is simple, and the reduction of the volume of the display device and the further cost reduction are facilitated.
In the embodiments of the present application, the propagation directions of the light beams all refer to the direction of the main optical axis of the light beams.
Illustratively, as shown in fig. 6, the first mirror 121 and the image generating unit 110 are located on a side of the second mirror 122 facing the polarized projection unit 130. Also, the first mirror 121 and the image generating unit 110 are at least partially opposed in any direction perpendicular to the light exit direction of the second mirror 122. For example, assuming that the light emitting direction of the second reflecting mirror 122 is perpendicular to the paper surface, the first reflecting mirror 121 and the second reflecting mirror 122 are arranged to face each other left and right. Thus, the off-axis degree of the second mirror 122 and the first mirror 121 is small, which is advantageous for increasing a field of view (FOV) of the display device. Also, it is advantageous to reduce the size of the display device in the light-emitting direction of the second mirror 122.
In some examples, an orthographic projection of the first mirror 121 on a plane where a light exit surface of the image generation unit 110 is located at least partially coincides with the image generation unit 110, for example, the orthographic projection includes the light exit surface.
When the second reflector 121 is an axisymmetric structure, the light-emitting direction of the second reflector 122 is the normal direction of the center of the reflecting surface of the second reflector 122.
Illustratively, in the embodiment shown in FIG. 5, the first mirror 121 is a plane mirror. The second mirror 122 is a curved mirror, such as a concave mirror, to form a magnified virtual image. Here, the concave mirror may be a free-form surface mirror.
In the example shown in fig. 5, the normal of the first mirror 121 makes an angle of 45 degrees with the light outgoing direction of the image generating unit 110, so that the propagation direction of the incident light of the first mirror 121 is perpendicular to the propagation direction of the outgoing light of the first mirror 121. For example, the propagation direction of the incident light of the first mirror 121 is the x direction, the propagation direction of the outgoing light of the first mirror 121 (i.e., the propagation direction of the incident light of the second mirror 122) is the y direction, and the x direction is perpendicular to the y direction. Here, the propagation direction of the light emitted from the second reflecting mirror 122 is the z direction. The x-direction, the y-direction and the z-direction are perpendicular to each other.
Exemplarily, the polarization transmission unit 130 includes a polarizer (also called a polarizer). The polarization direction (also called transmission direction) of the polarizer is perpendicular to the first polarization direction. In the polarizing plate, since light parallel to the self-polarization direction is transmitted and light perpendicular to the self-polarization direction is absorbed, it is possible to realize transmission of linearly polarized light in the second polarization direction and blocking of linearly polarized light in the first polarization direction by the polarizing plate having the polarization direction perpendicular to the first polarization direction. The polarization transmission unit is realized by adopting a polaroid, so that the structure is simplified and the cost is reduced.
Alternatively, in other embodiments, the polarization transmission unit 130 includes a liquid crystal panel configured to transmit at least part of the linearly polarized light of the second polarization direction and to absorb the linearly polarized light of the first polarization direction. The deflection of liquid crystal in the liquid crystal panel is realized by controlling the working voltage of the liquid crystal panel, so that the polarization direction of linearly polarized light transmitted by the liquid crystal layer is controlled.
The operation of the display device shown in fig. 5 will be briefly described. The linearly polarized light in the first polarization direction is assumed to be S light, and the linearly polarized light in the second polarization direction is assumed to be P light. The polarization transmission unit 130 is configured to allow P light to transmit therethrough and not to allow S light to transmit therethrough. The light beam provided by the image generating unit 110 is S light, and the light emitted after being reflected by the first reflecting mirror 121 is still S light. The light emitted from the first mirror 121 enters the second mirror 122, and the light emitted from the second mirror 122 is P light because the propagation direction of the light emitted from the second mirror 122 is perpendicular to the incident surface of the first mirror 121. The outgoing light from the second reflecting mirror 122 is incident on the human eye through the polarization transmission unit 130, thereby forming a virtual image.
When the image generating unit 110 emits the light beam carrying the image information, since the light beam is linearly polarized light having the first polarization direction, it may be blocked by the polarization transmitting unit 130. When the user views the virtual image, the light beam provided by the image generation unit 110 is not incident on human eyes, and thus the image displayed by the image generation unit 110 is not seen. And the light beam provided by the image generating unit 110 corresponds to a linearly polarized light having a second polarization direction after passing through the imaging unit 120, and at least part of the linearly polarized light having the second polarization direction can transmit through the polarization transmission unit 130, so that the user can see the virtual image through the polarization transmission unit 130. Therefore, when viewing the virtual image, the user does not see the image formed by the image generation unit 110 and the virtual image formed by the imaging unit 120 at the same time, and the virtual image is not disturbed, so that the display effect of the display device is improved.
In addition, in the case where the first polarization direction is perpendicular to the second polarization direction, when the image generation unit 110 does not operate (i.e., does not emit light), the user does not see the image generation unit 110 and the imaging unit 120 behind the polarization transmission unit 130 under the shielding of the polarization transmission unit 130. In addition, the two reflectors can simultaneously realize the conversion of the polarization direction and the formation of a virtual image, so that the structure is simple, the size of the display device is favorably reduced, and the cost is further reduced.
Fig. 7 is a schematic partial structure diagram of another display device provided in an embodiment of the present application. The display device shown in fig. 7 is different from the display device shown in fig. 5 in the type of the first reflecting mirror. For ease of illustration, the housing 140 is not shown in this embodiment. As shown in fig. 7, the first mirror 121 is a spherical mirror. The main optical axis of the spherical reflector forms a 45-degree angle with the light emitting direction of the image generating unit 110, so that the propagation direction of the incident light of the first reflector 121 is perpendicular to the propagation direction of the emergent light of the first reflector 121.
Fig. 8 is a schematic partial structural diagram of another display device provided in an embodiment of the present application. The display device shown in fig. 8 is different from the display device shown in fig. 5 in the type of the first reflecting mirror. For ease of illustration, the housing 140 is not shown in this embodiment. As shown in fig. 8, the first reflecting mirror 121 is a curved reflecting mirror. For example a concave mirror. The main optical axis of the concave reflector forms a 45-degree angle with the light emitting direction of the image generating unit 110, so that the propagation direction of the incident light of the first reflector 121 is perpendicular to the propagation direction of the emergent light of the first reflector 121.
The operation and principle of the display device shown in fig. 7 and 8 are similar to those of the display device shown in fig. 4, and a detailed description thereof is omitted.
Fig. 9 is a schematic partial structural diagram of another display device provided in an embodiment of the present application. The display device shown in fig. 9 is different from the display device shown in fig. 5 in the structure of the imaging unit 120. And for ease of illustration, the housing 140 is not shown. As shown in fig. 9, the imaging unit 120 includes: a polarization direction converting structure 120a and an imaging structure 120b. The polarization direction conversion structure 120a is used to convert the linearly polarized light B1 of the first polarization direction into the linearly polarized light B2 having the second polarization direction. The imaging structure 120B is configured to form a virtual image based on the linearly polarized light B2 of the second polarization direction emitted from the polarization direction conversion structure 120 a.
As shown in fig. 9, the polarization direction conversion structure 120a includes five mirrors, which are sequentially located on the propagation path of the light beam provided by the image generation unit 120. There are two first mirrors 121, 123 and three second mirrors 122, 124 and 125 among the five mirrors. The polarization direction of the outgoing light from the first mirrors 121 and 123 is the same as the polarization direction of the incident light from the first mirrors 121 and 123. The polarization direction of the outgoing light from the second mirrors 122, 124, and 125 is perpendicular to the polarization direction of the incoming light from the second mirrors 122, 124, and 125.
After exiting from the image generating unit 110, the light beam (the linearly polarized light B1 in the first polarization direction) is reflected to the first second mirror 122 through the first mirror 121, and then is reflected by the first second mirror 122 to become the linearly polarized light B2 in the second polarization direction and exit to the other first mirror 123, where the linearly polarized light B2 in the second polarization direction still exits from the first mirror 123. Linearly polarized light B2 of the second polarization direction is incident on the second mirror 124. The light is reflected by the second reflecting mirror 124 and becomes linearly polarized light B1 with the first polarization direction and then exits. Subsequently, the linearly polarized light B1 of the first polarization direction is incident to the third second mirror 125. The linearly polarized light B1 with the first polarization direction is reflected by the third second reflecting mirror 125, and then is changed into the linearly polarized light B2 with the second polarization direction, and then is emitted to the imaging structure 120B.
In some examples, the mirror before the first mirror in the propagation path of the light beam may be the second mirror, e.g., in fig. 9, the mirror before the first mirror 123 is the second mirror 122. In other examples, the mirror that is prior to the first mirror in the propagation path of the light beam may be the first mirror.
The mirror in front of the second mirror in the propagation path of the light beam may be the first mirror or the second mirror. For example, as can be seen from fig. 9, the mirror before the second mirror 122 is the first mirror 121, and the mirror before the second mirror 125 is the second mirror 124.
In the embodiment shown in fig. 9, light emitted from third second mirror 125 directly propagates to imaging structure 120b, alternatively, in other embodiments, light emitted from second mirror 125 may be reflected to imaging structure 120b via other mirrors as long as it is ensured that the polarization direction of light emitted from second mirror 125 is not changed by other mirrors. In the embodiment of the present application, whether or not other mirrors are provided depends on the relative positions of the imaging structure 120b, the polarization transmission unit 130, and the third second mirror 125.
The imaging structure 120b includes a curved mirror. The propagation direction of the emergent light of the curved surface mirror and the incident plane of the third second mirror 125 are located in the same optical plane, so that the curved surface mirror does not change the polarization direction of the received linearly polarized light, and directly reflects the received linearly polarized light B2 with the second polarization direction to a polarization transmission unit (not shown in fig. 9), and the received linearly polarized light B2 is transmitted to human eyes through the polarization transmission unit.
Alternatively, in other embodiments, third second mirror 125 in fig. 9 may be multiplexed to form a virtual image, and a separate imaging structure may be removed, as long as the propagation direction of light exiting third second mirror 125 is ensured to exit from the polarization transmission unit. For example, when third second mirror 125 is multiplexed to form a virtual image, third second mirror 125 may be a curved mirror.
It should be noted that the number of the second mirrors in the polarization direction conversion structure 120a in the embodiment of the present application may be set according to actual needs, and is only an odd number, which is not limited in the present application. For example, the number of the second mirrors 122 is 3 in fig. 9, and the number of the second mirrors 122 is 1 in fig. 10. Here, the number of the second reflecting mirrors is set to be an odd number in order to ensure that the polarization direction of the linearly polarized light finally emitted by the polarization direction conversion structure 120a after the polarization direction conversion is performed a plurality of times is perpendicular to the polarization direction of the linearly polarized light received by the polarization direction conversion structure 120 a.
Fig. 10 is a schematic partial structural diagram of another display device provided in an embodiment of the present application. The display device shown in fig. 10 is different from the display device shown in fig. 9 in the structure of the polarization direction conversion structure. As shown in fig. 10, the polarization conversion structure 120a includes two mirrors. The two mirrors include a first mirror 121 and a second mirror 122. The light beam (linearly polarized light B1 of the first polarization direction) exits from the image generating unit 110, is reflected to the second mirror 122 by the first mirror 121, is then changed into linearly polarized light B2 of the second polarization direction by being reflected by the second mirror 122, and exits to the imaging structure 120B.
Alternatively, in addition to employing a mirror as the polarization direction conversion structure, in other examples, the polarization direction conversion structure may employ a polarization direction conversion device. Fig. 11 is a schematic structural diagram of a polarization direction conversion device according to an embodiment of the present application. As shown in fig. 11, the polarization direction conversion device includes a plurality of polarization separation films 221 and a plurality of 1/2 wave plates 222. The plurality of polarization separation films 221 are arranged in parallel and form an angle of 45 ° with the optical axis direction of the polarization direction conversion device. The 1/2 wave plates 222 are arranged on the same plane at intervals, and the extension direction of the main optical axis of the 1/2 wave plate 222 is the same as the optical axis direction of the polarization direction conversion device.
Here, the polarization separation film 221 transmits linearly polarized light of the first polarization direction and reflects linearly polarized light of the second polarization direction. Here, the linearly polarized light of the first polarization direction is P light, and the linearly polarized light of the second polarization direction is S light. In this way, the linearly polarized light of the first polarization direction supplied from the image generating unit 110 is transmitted through the polarization separation film 221, passes through the corresponding 1/2 wave plate 222, and is then emitted as linearly polarized light of the second polarization direction. And the linearly polarized light of the second polarization direction supplied from the image generating unit 110 is reflected to the adjacent polarization separation film 221 by the corresponding polarization separation film 221, and then reflected again by the adjacent polarization separation film 221 to be emitted from the polarization conversion device. Thus, the polarization conversion device converts the linearly polarized light in the first polarization direction into the linearly polarized light in the second polarization direction and emits the linearly polarized light.
In some examples, imaging structure 120b is a reflective imaging element, e.g., a curved mirror or the like. In other examples, the imaging structure 120b is a transmissive imaging element, such as a lens or a lens group of lenses. When the imaging structure 120b employs a transmissive imaging element, the display device is a VR display device, and when the imaging structure 120b employs a lens, the display device is an AR display device.
Optionally, the display device may further include a main processor. The main processor is used for sending image data to the image generation unit.
Optionally, the display device further comprises a power supply for supplying power to the main processor and the image generation unit.
Embodiments of the present application further provide a vehicle, which includes any one of the foregoing display devices. Vehicles include, but are not limited to, automobiles, airplanes, trains, or ships, etc.
Referring to fig. 12, fig. 12 is a functional schematic diagram of a vehicle according to an embodiment of the present disclosure.
The vehicle may include various subsystems such as a sensor system 21, a control system 22, one or more peripherals 23 (one shown for example), a power supply 24, a computer system 25, and a display system 26, which may be in communication with each other. The display system 22 may include the display device provided in the embodiments of the present application. The vehicle may also include other functional systems such as an engine system, a cabin, etc. that power the vehicle, and the application is not limited thereto.
The sensor system 21 may include a plurality of detecting devices, which sense the measured information and convert the sensed information into electrical signals according to a certain rule or output information in other desired forms. As shown in fig. 12, the detection devices may include a Global Positioning System (GPS), a vehicle speed sensor, an Inertial Measurement Unit (IMU), a radar Unit, a laser range finder, a camera, a wheel speed sensor, a steering sensor, a gear sensor, or other elements for automatic detection, and the like, which are not limited in the present application.
Control system 22 may include several elements, such as illustrated steering units, braking units, lighting systems, autopilot systems, map navigation systems, network time tick systems, and obstacle avoidance systems. The control system 22 can receive information (such as vehicle speed, vehicle distance, etc.) sent by the sensor system 21, and realize functions of automatic driving, map navigation, etc.
Optionally, the control system 14 may further include components such as a throttle controller and an engine controller for controlling the vehicle speed, which is not limited in this application.
The peripheral device 23 may include several elements such as a communication system, a touch screen, a user interface, a microphone, and a speaker, among others. Wherein the communication system is used for realizing network communication between the vehicle and other devices except the vehicle. In practical applications, the communication system may use wireless communication technology or wired communication technology to implement network communication between the vehicle and other devices. The wired communication technology may refer to communication between the vehicle and other devices through a network cable or an optical fiber, and the like.
Power source 24 represents a system that provides electrical power or energy to the vehicle, which may include, but is not limited to, rechargeable lithium or lead-acid batteries, and the like. In practical applications, one or more battery assemblies in the power supply are used for providing electric energy or energy for starting the vehicle, and the type and material of the power supply are not limited in the present application.
Several functions of the vehicle may be controlled by the computer system 25. The computer system 25 may include one or more processors 2501 (illustrated as one processor for example) and memory 2502 (also referred to as storage devices). In practical applications, the memory 2502 may be also inside the computer system 25, or may be external to the computer system 25, for example, as a cache in a vehicle, and the present application is not limited thereto.
Among other things, the processor 2501 may include one or more general-purpose processors, such as a Graphics Processing Unit (GPU). The processor 2501 may be configured to execute related programs or instructions corresponding to the programs stored in the memory 2502 to implement the corresponding functions of the vehicle.
Optionally, the memory 2502 may store information such as road maps, driving routes, sensor data, and the like, in addition to program code or instructions. The computer system 25 may be combined with other elements of the functional block diagram of the vehicle, such as sensors in a sensor system, GPS, etc., to implement the relevant functions of the vehicle. For example, the computer system 25 may control the driving direction or driving speed of the vehicle based on the data input from the sensor system 21, and the like, but the present application is not limited thereto.
The display system 26 may interact with other systems in the vehicle, for example, it may display navigation information sent by the control system 22, or play videos sent by the computer system 25 and the peripherals 23, etc. For the specific structure of the display system 26, reference is made to the above-mentioned embodiments of the display device, and details are not repeated here.
The four subsystems, i.e., the sensor system 21, the control system 22, the computer system 25 and the display system 26, illustrated in the present embodiment are only examples and are not limited thereto. In practical applications, a vehicle may combine several elements in the vehicle according to different functions, thereby obtaining subsystems with corresponding different functions. In practice, the vehicle may include more or fewer subsystems or components, and the application is not limited thereto.
The vehicle in the embodiment of the present application may be a known vehicle such as an automobile, an airplane, a ship, a rocket, or may be a vehicle newly appearing in the future. The vehicle may be an electric vehicle, a fuel vehicle, or a hybrid vehicle, for example, a pure electric vehicle, an extended range electric vehicle, a hybrid electric vehicle, a fuel cell vehicle, a new energy vehicle, and the like, which is not specifically limited in this application.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," "third," and the like, as used in the description and in the claims of the present disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. "A and/or B" means that the following three conditions exist: A. b, and A and B.
The above description is only one embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like made on the basis of the present application should be included in the protection scope of the present application.
Claims (17)
1. A display device, comprising: an image generation unit, an imaging unit and a polarization transmission unit;
the image generation unit is used for providing a light beam, the light beam carries image information and is linearly polarized light with a first polarization direction;
the imaging unit is used for converting at least part of the light beam into linearly polarized light with a second polarization direction, and forming a virtual image based on the linearly polarized light with the second polarization direction, wherein the second polarization direction is intersected with the first polarization direction;
the polarization transmission unit is positioned on a viewing path of the virtual image, and is configured to transmit at least part of the linearly polarized light of the second polarization direction and block the linearly polarized light of the first polarization direction;
wherein the image generation unit and the imaging unit are located on the same side of the polarization transmission unit.
2. The display device according to claim 1, wherein the imaging unit includes a plurality of mirrors which are sequentially arranged on a propagation path of the light beam, at least one first mirror and M second mirrors being present among the plurality of mirrors, wherein M is an odd number;
the polarization direction of emergent light of the first reflector is the same as that of incident light of the first reflector;
the polarization direction of emergent light of the second reflector is vertical to that of incident light of the second reflector;
one of the second mirrors closest to the polarization transmission unit is used to form the virtual image on a propagation path of the light beam.
3. The display device according to claim 2, wherein a propagation direction of the outgoing light from the second reflecting mirror is perpendicular to an incident surface of the reflecting mirror located before the second reflecting mirror in a propagation path of the light beam.
4. The display device according to claim 1, wherein the imaging unit includes a first mirror and a second mirror;
the first reflector is used for reflecting the light beam provided by the image generating unit to the second reflector, and the polarization direction of emergent light of the first reflector is the same as that of incident light of the first reflector;
the second mirror is used for coming from the first mirror the light beam reflection extremely polarization transmission unit, just the second mirror is used for forming the virtual image, the direction of propagation of the emergent light of second mirror with the incident plane of first mirror is perpendicular.
5. The display device according to claim 4, wherein the first mirror and the image generating unit are located on a side of the second mirror facing the polarized projection unit, and the first mirror and the image generating unit are at least partially opposed in any direction perpendicular to a light outgoing direction of the second mirror.
6. The display device according to claim 1, wherein the imaging unit includes: a polarization direction conversion structure and an imaging structure;
the polarization direction conversion structure is used for converting the light beam into linearly polarized light with a second polarization direction;
the imaging structure is used for forming the virtual image based on the linearly polarized light in the second polarization direction emitted by the polarization direction conversion structure.
7. The display device according to claim 6, wherein the polarization direction conversion structure comprises a plurality of mirrors which are arranged in sequence on a propagation path of the light beam, at least one first mirror and M second mirrors being present among the plurality of mirrors, wherein M is an odd number;
the polarization direction of emergent light of the first reflector is the same as that of incident light of the first reflector;
the polarization direction of emergent light of the second reflector is vertical to the polarization direction of incident light of the second reflector.
8. The display device according to claim 6, wherein the polarization direction conversion structure comprises a first mirror and a second mirror,
the first reflecting mirror is used for reflecting the light beam provided by the image generating unit to the second reflecting mirror, and the polarization direction of emergent light of the first reflecting mirror is the same as that of incident light of the first reflecting mirror;
the second reflector is used for reflecting the light beam from the first reflector to the imaging structure, and the propagation direction of emergent light of the second reflector is perpendicular to the incident surface of the first reflector.
9. The display device according to claim 6, wherein the polarization direction conversion structure comprises: the polarization conversion device is configured to transmit the linearly polarized light in the second polarization direction, and convert the linearly polarized light in a third polarization direction into the linearly polarized light in the second polarization direction and then transmit the linearly polarized light in the second polarization direction, wherein the third polarization direction is perpendicular to the second polarization direction.
10. A display device as claimed in any one of claims 6 to 9, wherein the imaging structure comprises a curved mirror.
11. The display device according to any one of claims 2 to 5 and 7 to 8, wherein the first mirror is any one of a spherical mirror, a curved mirror, and a planar mirror;
the second reflector is any one of a spherical reflector, a curved reflector and a plane reflector.
12. The display device according to any one of claims 1 to 11, wherein the polarization transmission unit includes a polarizing plate having a polarization direction perpendicular to the first polarization direction;
alternatively, the polarization transmission unit includes a liquid crystal panel configured to transmit at least part of the linearly polarized light of the second polarization direction and to absorb the linearly polarized light of the first polarization direction.
13. The display device according to any one of claims 1 to 12, characterized in that the display device further comprises: a housing; the shell is provided with an observation window, and the polarization transmission unit is arranged on the observation window; the image generation unit and the imaging unit are both located within the housing.
14. The display device according to any one of claims 1 to 13, wherein the virtual image is a three-dimensional image or a two-dimensional image.
15. The display device according to any one of claims 1 to 14, wherein the first polarization direction is perpendicular to the second polarization direction.
16. The display device according to any one of claims 1 to 15, wherein the display device is a desktop display device.
17. A vehicle comprising a display device according to any one of claims 1 to 15 mounted on the vehicle.
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| CN202211204277.7A CN115629475A (en) | 2022-01-30 | 2022-01-30 | Display device and vehicle |
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| CN202210114724.3A CN116560083A (en) | 2022-01-30 | 2022-01-30 | Display device and vehicle |
| CN202211204277.7A CN115629475A (en) | 2022-01-30 | 2022-01-30 | Display device and vehicle |
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| CN203909400U (en) * | 2014-06-30 | 2014-10-29 | 李艳龙 | Head-up display system based on polarized light |
| US20200209960A1 (en) * | 2018-05-31 | 2020-07-02 | Boe Technology Group Co., Ltd. | Head-up display system and display method, vehicle, head-up display device, and computer-readable storage medium |
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| JP6024348B2 (en) * | 2012-09-28 | 2016-11-16 | 株式会社Ｊｖｃケンウッド | Projection device |
| DE112015002814B4 (en) * | 2014-06-13 | 2022-04-07 | Mitsubishi Electric Corporation | Virtual image display device |
| CN109709676A (en) * | 2019-03-07 | 2019-05-03 | 浙江水晶光电科技股份有限公司 | A kind of augmented reality optics module and augmented reality device |
| CN112444979A (en) * | 2019-09-03 | 2021-03-05 | 舜宇光学（浙江）研究院有限公司 | Near-eye display optical system and near-eye display apparatus |
| CN111999898A (en) * | 2020-09-18 | 2020-11-27 | 京东方科技集团股份有限公司 | Optical display system and display device |
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2022
- 2022-01-30 CN CN202211204277.7A patent/CN115629475A/en active Pending
- 2022-01-30 CN CN202210114724.3A patent/CN116560083A/en active Pending
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| CN203909400U (en) * | 2014-06-30 | 2014-10-29 | 李艳龙 | Head-up display system based on polarized light |
| US20200209960A1 (en) * | 2018-05-31 | 2020-07-02 | Boe Technology Group Co., Ltd. | Head-up display system and display method, vehicle, head-up display device, and computer-readable storage medium |
| CN213948308U (en) * | 2020-09-30 | 2021-08-13 | 广东好翼未来科技有限公司 | Head-up display and motor vehicle based on light screen |
| CN113985519A (en) * | 2021-12-24 | 2022-01-28 | 深圳铅笔视界科技有限公司 | Optical waveguide device, display device and display equipment |
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