CN220085167U - Head-up display device - Google Patents

Head-up display device Download PDF

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Publication number
CN220085167U
CN220085167U CN202320348663.7U CN202320348663U CN220085167U CN 220085167 U CN220085167 U CN 220085167U CN 202320348663 U CN202320348663 U CN 202320348663U CN 220085167 U CN220085167 U CN 220085167U
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image
light beam
light
image light
areas
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刘小瑞
何晓军
霍明鑫
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Lixun Precision Industry Wuhu Co ltd
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Lixun Precision Industry Wuhu Co ltd
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Abstract

The utility model discloses a head-up display device, which comprises an image source, a light-splitting microstructure and a reflecting unit, wherein the light-splitting microstructure is arranged on the image source; the image source comprises a plurality of first emergent areas and a plurality of second emergent areas, the first emergent areas and the second emergent areas are alternately arranged, the first emergent areas emit first image light beams, and the second emergent areas emit second image light beams; the light splitting microstructure is positioned on the light path of the first image light beam and the second image light beam, the first image light beam and the second image light beam propagate to the reflecting unit along different directions after passing through the light splitting microstructure, the reflecting unit reflects the first image light beam and the second image light beam to different areas of the windshield, the first image light beam and the second image light beam are reflected by the windshield to enter human eyes, and virtual images are formed at different depth of field; the first image beam and the second image beam contain different image information. The technical scheme of the embodiment of the utility model solves the problems that the long-range and short-range images of the existing scheme can not cover all the angles of view and can consume a part of pixels.

Description

Head-up display device
Technical Field
The utility model relates to the technical field of display, in particular to a head-up display device.
Background
The Head-up display (HUD) is a vehicle-mounted display for comparing the heat and the fire at present, and has the function of projecting important driving information such as the speed of a hour, navigation and the like onto a virtual image at a certain distance in front of a driver, so that the driver can see the important driving information such as the speed of the hour, navigation and the like without lowering the Head or turning the Head as much as possible, the blind area time caused by lowering the Head is avoided, and potential traffic accidents are reduced.
The existing HUD scheme is characterized in that a display unit is divided into two areas to realize split-screen display of images, one of the two areas is a distant view image, the other one of the two areas is a close view image, and a light-isolating plate is required to be added to the display unit to prevent light from being connected in series, however, the technical scheme cannot realize virtual image design with a large field angle, and the middle light-isolating plate also can consume a part of pixels of the display unit, so that waste is caused.
Disclosure of Invention
The utility model provides a head-up display device which is used for solving the problems that in the prior art, a display unit is divided into two independent image emergent areas and separated by a light-isolating plate, so that a far-near view image cannot cover all view angles, and the light-isolating plate is arranged on the emergent side of the display unit, so that a part of pixels of the display unit can be worn, and waste is caused.
According to an aspect of the present utility model, there is provided a head-up display device, including an image source, a spectroscopic microstructure, and a reflection unit;
the image source comprises a plurality of first emergent areas and a plurality of second emergent areas, the first emergent areas and the second emergent areas are alternately arranged, the first emergent areas emit first image light beams, and the second emergent areas emit second image light beams;
the light splitting microstructure is positioned on the light paths of the first image light beam and the second image light beam, the first image light beam and the second image light beam propagate to the reflecting unit along different directions after passing through the light splitting microstructure, the reflecting unit reflects the first image light beam and the second image light beam to different areas of a windshield, and the first image light beam and the second image light beam are reflected by the windshield to enter human eyes and form virtual images at different depth of field;
wherein the first image beam and the second image beam contain different image information.
Optionally, the reflecting unit includes a first plane mirror, a second plane mirror and a curved mirror;
the first plane reflector is positioned on the optical path of the first image light beam and is used for reflecting the first image light beam passing through the light splitting microstructure to the curved mirror;
the second plane mirror is positioned on the optical path of the second image light beam and is used for reflecting the second image light beam transmitted through the light splitting microstructure to the curved mirror.
Optionally, the light splitting microstructure includes a parallax barrier, and the parallax barrier includes a plurality of image beam emergence points;
the image beam emergent point is used for transmitting an image beam which propagates along a first direction in the first image beam and an image beam which propagates along a second direction in the second image beam;
wherein the first direction and the second direction intersect.
Optionally, the light-splitting microstructure includes a micro light-guiding prism;
the micro light guide prism is positioned on the emergent side of the first emergent area or the emergent side of the second emergent area;
the micro light guide prism is used for shaping the first image beam to the first direction or shaping the second image beam to the second direction.
Optionally, the light splitting microstructure includes a double microprism;
the double microprisms are used for shaping the first image beam to a first direction and shaping the second image beam to a second direction;
wherein the first direction and the second direction intersect.
Optionally, the light splitting microstructure includes a lenticular lens
The cylindrical lens is used for shaping the first image beam to a first direction and shaping the second image beam to a second direction;
wherein the first direction and the second direction intersect.
Optionally, the first direction and the second direction have an included angle between 15 ° and 30 °.
Optionally, the first image beam includes first image information, and the second image beam includes second image information.
Optionally, the image source comprises a liquid crystal display, the first exit region comprises a single row of pixels, and the second exit region comprises a single row of pixels.
Optionally, the head-up display device further includes a control unit, where the control unit is electrically connected to the image source, and is configured to match a plurality of the first emission areas, emit a plurality of image information contained in the first image light beams, and match a plurality of the second emission areas, and emit a plurality of image information contained in the second image light beams.
According to the technical scheme, the image source is divided into the first emergent areas and the second emergent areas which are alternately arranged, the multiple image beams emitted by the different emergent areas are configured to contain different image information, the first image beams and the second image beams are controlled to be incident to the reflecting unit in different directions through the light splitting microstructure, the multiple first image beams and the multiple second image beams can form virtual images with two large field angles containing different image information at different areas and depth of field, the problem that a far-near view image cannot cover all field angles due to the fact that the display unit is divided into the two image emergent areas and separated through the light isolating plate in the prior art is solved, and the light isolating plate can wear part of pixels of the display unit to cause waste is solved, and the effect of lower cost is achieved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a portion of a prior art head-up display device;
fig. 2 is a schematic structural diagram of a head-up display device according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of an image source according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a spectroscopic microstructure and an image source according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram of another spectroscopic microstructure and an image source according to an embodiment of the present utility model;
FIG. 6 is a schematic diagram of a spectroscopic microstructure and an image source according to an embodiment of the present utility model;
FIG. 7 is a schematic diagram of a spectroscopic microstructure and an image source according to an embodiment of the present utility model;
FIG. 8 is a schematic diagram of a spectroscopic microstructure and an image source according to an embodiment of the present utility model;
fig. 9 is a schematic light path diagram of a head-up display device according to an embodiment of the present utility model.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic diagram of a part of a head-up display device in the prior art, as shown in fig. 1, a display unit 1 is divided into two image display areas, including a first display area 1A and a second display area 1B, and split-screen display is performed, wherein one is a near-view display area and one is a far-view display area, and a light-shielding plate 2 is disposed between the first display area 1A and the second display area 1B and is used for separating the two image display areas to prevent light crosstalk, however, the far-view display area and the near-view display area only occupy a part of the display unit 1, so that a far-view image at a human eye cannot cover a large viewing angle, and the light-shielding plate 2 is disposed on an image light emitting side of the display unit 1, so that part of pixels of the display unit 1 can be lost, resulting in waste.
In order to solve the above-mentioned problems, a technical solution of an embodiment of the present utility model provides a head-up display device, fig. 2 is a schematic structural diagram of the head-up display device provided by the embodiment of the present utility model, and fig. 3 is a schematic structural diagram of an image source provided by the embodiment of the present utility model, as shown in fig. 2 and fig. 3, the head-up display device includes an image source 10, a light splitting microstructure 20 and a reflection unit 30; the image source 10 includes a plurality of first exit areas 11 and a plurality of second exit areas 12, the first exit areas 11 and the second exit areas 12 being alternately arranged, the first exit areas 11 emitting a first image light beam L1, the second exit areas 12 emitting a second image light beam L2; the light splitting microstructure 20 is located on the light path of the first image light beam L1 and the second image light beam L2, after the first image light beam L1 and the second image light beam L2 penetrate through the light splitting microstructure 20, the first image light beam L1 and the second image light beam L2 propagate to the reflecting unit 30 along different directions, the reflecting unit 30 reflects the first image light beam L1 and the second image light beam L2 to different areas of the windshield 40, the first image light beam L1 and the second image light beam L2 reflect into the human eye 50 through the windshield 40, and form virtual images at different depth of field; wherein the first image light beam L1 and the second image light beam L2 contain different image information.
The image source 10 includes, but is not limited to, a liquid crystal display screen, an OLED screen or a micro led screen, and the actual composition and specification can be set according to the actual requirements; the image source 10 is used for generating an image from image information and emitting an image beam, such as a driving direction indication image and a road speed limit image generated from external scene information acquired by a vehicle sensor or a camera, or a vehicle dashboard image generated from vehicle running information. The first exit area 11 and the second exit area 12 may be single-row pixels alternately arranged, and the image information contained in the first image beam L1 and the second image beam L2 may be set according to the imaging area and the imaging depth of field, which is not limited herein; the imaging areas and the imaging depths of field of the first image beam L1 and the second image beam L2 may be set according to actual requirements, such as the size of the eye box. The light splitting microstructure 20 includes, but is not limited to, a parallax barrier, and an optical element capable of changing the propagation direction of an image beam, such as a micro light guiding prism, may be selected according to the actual requirements such as the brightness of the image. The reflection unit 30 may be a lens group composed of a planar mirror and a curved mirror, the actual optical element composition and the spatial arrangement between the elements may be set according to the actual imaging requirement and the spatial arrangement requirement, for example, the type and the spatial arrangement of the optical element may be adjusted according to the angle of view and the virtual image distance, so as to adjust the optical path distribution of the first image light beam L1 and the second image light beam L2 and the distribution of the imaging area.
Specifically, the first exit area 11 emits the first image light beam L1, the second exit area 12 emits the second image light beam L2, the first image light beam L1 and the second image light beam L2 propagate to the reflection unit 30 along different directions after passing through the spectroscopic microstructure 20, the reflection unit 30 reflects the first image light beam L1 and the second image light beam L2 to different areas of the windshield, and the first image light beam L1 and the second image light beam L2 reflect through the windshield 40 into the human eye 50 to form virtual images at different depths of field.
In the optical field, the field angle, also called the field of view, is the size of which determines the field of view of the optical instrument. In the optical instrument, a lens of the optical instrument is taken as a vertex, and an included angle formed by two edges of the maximum range of the lens, which can be passed through by an object image of a measured object, is called a field angle. It is to be understood that the plurality of first exit areas 11 and the second exit areas 12 that are alternately arranged cover all the image beam exit areas of the image source 10, and the first exit areas 11 and the second exit areas 12 respectively emit the image beams containing different image information, and it is to be understood that, because the coverage area of the first exit areas 11 and the second exit areas 12 is wider than that of the two image display areas shown in fig. 1, and because the lengths of the first exit areas 11 and the second exit areas 12 along the alternately arranged directions are smaller in practical implementation, by configuring the image information contained in the plurality of first image beams L1 and the plurality of second image beams L2, the plurality of first exit areas 11 and the plurality of second exit areas 12 can respectively and completely display two images containing different image information, and after the propagation direction and the focal length are further adjusted by the light splitting microstructure 20 and the reflecting unit 30, two large viewing angle images with different depths can be formed in different areas.
According to the technical scheme, the image source is divided into the first emergent areas and the second emergent areas which are alternately arranged, the multiple image beams emitted by the different emergent areas are configured to contain different image information, the first image beams and the second image beams are controlled to be incident to the reflecting unit in different directions through the light splitting microstructure, the multiple first image beams and the multiple second image beams can form virtual images with two large field angles containing different image information at different areas and depth of field, the problem that a far-near view image cannot cover all field angles due to the fact that the display unit is divided into the two image emergent areas and separated through the light isolating plate in the prior art is solved, and the light isolating plate can wear part of pixels of the display unit to cause waste is solved, and the effect of lower cost is achieved.
Optionally, with continued reference to fig. 2, the reflecting unit 30 includes a first planar mirror 31, a second planar mirror 32, and a curved mirror 33; the first plane mirror 31 is located on the optical path of the first image beam L1, and is configured to reflect the first image beam L1 transmitted through the spectroscopic microstructure 20 to the curved mirror 33; the second plane mirror 32 is located on the optical path of the second image beam L2, and is configured to reflect the second image beam L2 transmitted through the spectral microstructure 20 to the curved mirror 33.
The layout and actual specifications of the first plane mirror 31, the second plane mirror 32, and the curved mirror 33 may be set according to the spatial layout of the head-up display device, the layout and depth of field of the imaging area of the two images including different image information, and the specifications of the spectroscopic microstructure 20.
Specifically, the first emitting area 11 emits the first image light beam L1, the second emitting area 12 emits the second image light beam L2, the first image light beam L1 and the second image light beam L2 include different image information, after passing through the spectroscopic microstructure 20, the multiple first image light beam L1 and the multiple second image light beam L2 are respectively transmitted to the first plane mirror 31 and the second plane mirror 32 along different directions, and after being reflected, are incident on different positions of the curved mirror 33, focused by the curved mirror 33, are incident on different areas of the windshield 40, and the first image light beam L1 and the second image light beam L2 are reflected by the windshield 40 into the human eye 50, and form two virtual images including different image information at different depths of field.
Optionally, fig. 4 is a schematic structural diagram of a light splitting microstructure and an image source according to an embodiment of the present utility model, as shown in fig. 4, the light splitting microstructure 20 includes a parallax barrier 21, and the parallax barrier 21 includes a plurality of image beam emitting points 211; the image beam exit point 211 is for transmitting an image beam propagating in the first direction a in the first image beam L1 and an image beam propagating in the second direction b in the second image beam L2; wherein the first direction a and the second direction b intersect.
The parallax barrier 21 includes, but is not limited to, a grating, and a control unit for controlling the slit distance (the size of the image beam exit point 211) may be provided according to actual requirements, so as to adjust the image beam transmittance and the light propagation angle; the parallax barrier 21 is configured to transmit a first image light beam L1 propagating in a first direction a and a second image light beam L2 propagating in a second direction b. In practice, the positional relationship of the parallax barrier 21 with the first and second exit areas 11 and 12, and the size of the parallax barrier 21 may be set according to the size of the first and second exit areas 11 and 12, the actual configuration of the image source 10, and the imaging requirements.
Specifically, the plurality of first image light beams L1 and the plurality of second image light beams L2 propagate to the parallax barrier 21, and since the first image light beams L1 and the second image light beams L2 emitted from the image source 10 propagate in the same direction and are divergent light, image separation cannot be achieved if the divergent light is directly incident on the reflection unit 30. The parallax barrier 21 is arranged on the outgoing light path of the first image light beam L1 and the second image light beam L2, and is provided with a plurality of image light beam outgoing points 211 (slits), and because the parallax barrier 21 and the plurality of first outgoing areas 11 and the plurality of second outgoing areas 12 are provided with a certain position relationship, the plurality of first image light beams L1 and the plurality of second image light beams L2 are incident on the parallax barrier 21, the parallax barrier 21 can adjust the propagation direction of the image light beams, the image light beams propagated along the first direction a in the first image light beam L1, and the image light beams propagated along the second direction b in the second image light beam L2 can be propagated to the reflecting unit 30 along different directions after penetrating the plurality of slits of the parallax barrier 21, and then the effect of image separation can be realized during imaging.
Optionally, fig. 5 is a schematic structural diagram of another light splitting microstructure and an image source provided in the embodiment of the present utility model, as shown in fig. 5, on the basis of the light splitting microstructure shown in fig. 4, the light splitting microstructure 20 provided in the embodiment of the present utility model further includes a light guiding prism 22, where the light guiding prism 22 is located on the exit side of the first exit area 11 (not shown in fig. 5), or on the exit side of the second exit area 12; the micro light guide prism 22 is used to shape the first image beam L1 to a first direction a or to shape the second image beam L2 to a second direction b.
The actual specification and the setting position of the micro light guide prism 22 may be set according to the spatial layout of the rest components of the head-up display device, the size of the eye box, and the like, and may be adhered to the surface of the image source 10 by adhesive in a specific implementation.
Specifically, the parallax barrier 21 shields the image light beams propagating in the remaining directions while transmitting the image light beams propagating in the first direction a in the first image light beam L1 and the image light beams propagating in the second direction b in the second image light beam L2, resulting in a low utilization ratio of the resultant light, thereby affecting the imaging brightness of the head-up display device. The micro light guide prism 22 is arranged on the emergent side of the image source 10, and the image light beam enters the micro light guide prism 22 to realize deflection, so that more image light beams can penetrate the parallax barrier 21, the light utilization rate is improved, and the imaging brightness is further ensured.
It should be noted that fig. 5 only shows the situation that the parallax barrier 21 and the micro light guide prism 22 are used in cooperation, and according to actual needs, the micro light guide prism 22 may also be used alone, and fig. 6 is a schematic structural diagram of another light splitting microstructure and an image source according to an embodiment of the present utility model, as shown in fig. 6, the micro light guide prism 22 is disposed on the outgoing side of the image source 10, and shapes the propagation direction of the second image light beam L2 entering the micro light guide prism 22, so that the first image light beam L1 and the second image light beam L2 propagate to the reflection unit 30 along the first direction a and the second direction b, respectively, thereby achieving the effect of image separation.
Optionally, fig. 7 is a schematic structural diagram of another light splitting microstructure and an image source according to an embodiment of the present utility model, where, as shown in fig. 7, the light splitting microstructure includes a double microprism 23; the double micro prism 23 is used for shaping the first image beam L1 to a first direction a and shaping the second image beam L2 to a second direction b; wherein the first direction a and the second direction b intersect.
The actual specifications of the double microprisms 23 may be set according to the spatial layout of the remaining components of the head-up display device, the size of the eye-box, and the like, and may be adhered to the surface of the image source 10 by adhesive in practical implementation.
Specifically, the first image light beam L1 and the second image light beam L2 are emitted from the image source 10 and enter the double micro prism 23, are refracted by the double micro prism 23 and then emitted to the reflecting unit 30 along different directions, are reflected and focused by the reflecting unit 30, and the plurality of first image light beams L1 and the plurality of second image light beams L2 are incident on different areas of the windshield 40 and are reflected into the human eye 50 to form two images containing different image information at different depths of view. Because the double-micro prism 23 can shape the propagation directions of the first image light beam L1 and the second image light beam L2 at the same time, the propagation direction of the propagation range of the image light beam in a larger range can be adjusted by selecting the specification of the double-micro prism 23, so that the adjustability of the image subsection area formed by the first image light beam L1 and the second image light beam L2 is stronger, and the double-micro prism 23 can be adhered to the surface of the image source 10 in specific implementation, so that the first image light beam L1 and the second image light beam L2 directly enter the double-micro prism 23 without air propagation, thereby effectively reducing light loss and having better imaging effect.
Optionally, fig. 8 is a schematic structural diagram of another optical splitting microstructure and an image source according to an embodiment of the present utility model, and as shown in fig. 8, the optical splitting microstructure includes a lenticular lens 24. The lenticular lens 24 is used for shaping the first image light beam L1 to a first direction a and shaping the second image light beam L2 to a second direction b; wherein the first direction a and the second direction b intersect.
The actual specification of the lenticular lens 24 may be set according to the spatial layout of the remaining components of the head-up display device, the size of the eye box, and the like, and may be adhered to the surface of the image source 10 by adhesive in practical implementation.
Specifically, the first image light beam L1 and the second image light beam L2 are emitted from the image source 10 and enter the lenticular lens 24, are refracted by the lenticular lens 24 and then emitted to the reflecting unit 30 along different directions, are reflected and focused by the reflecting unit 30, and the plurality of first image light beams L1 and the plurality of second image light beams L2 are incident on different areas of the windshield 40 and are reflected into the human eye 50 to form two images containing different image information in different depths of view. Because the cylindrical lens 24 can shape the propagation directions of the first image light beam L1 and the second image light beam L2 at the same time, the adjustment of the propagation directions of the propagation ranges of the image light beams in a larger range can be realized by selecting the specification of the cylindrical lens 24, so that the adjustability of the image division areas formed by the first image light beam L1 and the second image light beam L2 is stronger, and when in implementation, the double micro-prisms can be adhered to the surface of the image source 10, so that the first image light beam L1 and the second image light beam L2 directly enter the double micro-prisms 23 without air propagation, thereby effectively reducing light loss and having better imaging effect.
Optionally, fig. 9 is a schematic light path diagram of a head-up display device according to an embodiment of the present utility model, as shown in fig. 9, an included angle α between a first direction a and a second direction b is between 15 ° and 30 °.
Specifically, the included angle alpha between the first direction a and the second direction b is controlled to be 15-30 degrees, so that effective separation of two images can be achieved, and the images are more balanced in brightness. In addition, the effective separation of the images can also reduce the dizziness problem possibly caused by the overlapping of the images, and improve the user experience effect of the HUD.
In one embodiment, the angle α between the first direction a and the second direction b is 23.7471 °, the length of the light ray c1 is 141.000mm, the length of the light ray c2 is 146.648mm, the length of the light ray c3 is 169.000mm, and the length of the light ray c4 is 158.118mm.
Alternatively, the first image beam L1 contains first image information and the second image beam L2 contains second image information.
The specific content of the first image information and the second image information may be set according to the imaging areas and depths of field of the first image light beam L1 and the second image light beam L2, for example, the image formed by the first image light beam L1 is located above the image formed by the second image light beam L2. The first image information with smaller depth of field can be instrument panel information such as vehicle speed, oil quantity and the like, and the second image information with larger depth of field can be navigation information such as road speed limit, driving direction indication and the like or road information.
Optionally, the image source comprises a liquid crystal display, the first exit region comprises a single row of pixels, and the second exit region comprises a single row of pixels.
Optionally, the head-up display device provided by the embodiment of the utility model further includes a control unit, where the control unit is electrically connected with the image source and is configured to match the plurality of first emitting areas, emit image information contained in the plurality of first image beams, and match the plurality of second emitting areas, and emit image information contained in the plurality of second image beams.
The control unit may be integrated in a vehicle body, classified according to information of a camera sensor and the like outside the vehicle and an internal instrument panel, and then converted into a digital signal, and transmitted to the image source 10.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present utility model may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present utility model are achieved, and the present utility model is not limited herein.
The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.

Claims (10)

1. The head-up display device is characterized by comprising an image source, a light-splitting microstructure and a reflecting unit;
the image source comprises a plurality of first emergent areas and a plurality of second emergent areas, the first emergent areas and the second emergent areas are alternately arranged, the first emergent areas emit first image light beams, and the second emergent areas emit second image light beams;
the light splitting microstructure is positioned on the light paths of the first image light beam and the second image light beam, the first image light beam and the second image light beam propagate to the reflecting unit along different directions after passing through the light splitting microstructure, the reflecting unit reflects the first image light beam and the second image light beam to different areas of a windshield, and the first image light beam and the second image light beam are reflected by the windshield to enter human eyes and form virtual images at different depth of field;
wherein the first image beam and the second image beam contain different image information.
2. The head-up display device of claim 1, wherein the reflecting unit comprises a first planar mirror, a second planar mirror, and a curved mirror;
the first plane reflector is positioned on the optical path of the first image light beam and is used for reflecting the first image light beam passing through the light splitting microstructure to the curved mirror;
the second plane mirror is positioned on the optical path of the second image light beam and is used for reflecting the second image light beam transmitted through the light splitting microstructure to the curved mirror.
3. The heads-up display device of claim 2 wherein the light splitting microstructure comprises a parallax barrier comprising a plurality of image beam exit points;
the image beam emergent point is used for transmitting an image beam which propagates along a first direction in the first image beam and an image beam which propagates along a second direction in the second image beam;
wherein the first direction and the second direction intersect.
4. The heads-up display device of claim 3 wherein the light splitting microstructures comprise micro light guiding prisms;
the micro light guide prism is positioned on the emergent side of the first emergent area or the emergent side of the second emergent area;
the micro light guide prism is used for shaping the first image beam to the first direction or shaping the second image beam to the second direction.
5. The head-up display device of claim 2, wherein the light splitting microstructures comprise double microprisms;
the double microprisms are used for shaping the first image beam to a first direction and shaping the second image beam to a second direction;
wherein the first direction and the second direction intersect.
6. The head-up display device of claim 2, wherein the light splitting microstructures comprise lenticular lenses
The cylindrical lens is used for shaping the first image beam to a first direction and shaping the second image beam to a second direction;
wherein the first direction and the second direction intersect.
7. The heads-up display device of any of claims 3-6, wherein the first direction and the second direction are angled between 15 ° and 30 °.
8. The heads-up display device of claim 1 wherein the first image beam comprises first image information and the second image beam comprises second image information.
9. The heads-up display device of claim 1 wherein the image source comprises a liquid crystal display, the first exit region comprises a single row of pixels, and the second exit region comprises a single row of pixels.
10. The head-up display device according to claim 1, further comprising a control unit electrically connected to the image source for matching a plurality of the first emission areas, emitting image information contained in the plurality of the first image light beams, and matching a plurality of the second emission areas, emitting image information contained in the plurality of the second image light beams.
CN202320348663.7U 2023-02-24 2023-02-24 Head-up display device Active CN220085167U (en)

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