CN213240676U

CN213240676U - Head-up display equipment and vehicle

Info

Publication number: CN213240676U
Application number: CN202021807601.0U
Authority: CN
Inventors: 方涛; 徐俊峰; 吴慧军
Original assignee: Future Beijing Black Technology Co ltd
Current assignee: Future Beijing Black Technology Co ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-05-18
Anticipated expiration: 2030-08-26

Abstract

The utility model discloses a head-up display equipment, vehicle, head-up display equipment includes: an image source; a reflective component; and a housing; the image source comprises a light source and a plurality of liquid crystal imaging layers, the working states of the liquid crystal imaging layers are switched, so that one of the liquid crystal imaging layers is in an imaging state, the rest liquid crystal imaging layers are in a light-transmitting state, light emitted by the light source is emitted through imaging light formed by the liquid crystal imaging layers in the imaging state, the reflection assembly is used for reflecting the imaging light, the reflected imaging light is emitted through the light outlet, and the imaging light emitted through the light outlet is reflected through the external imaging component to form a virtual image. The utility model discloses the formation of image position of accessible change virtual image guarantees that the formation of image position of virtual image keeps the same with driver's eyes focused position, avoids producing the conflict of vergence of vision, prevents that the driver from producing bad conditions such as tired, nausea, has improved the security of driving.

Description

Head-up display equipment and vehicle

Technical Field

The utility model belongs to the technical field of the optical display, concretely relates to head up display equipment, vehicle.

Background

HUD (head up display) is through reflective optical design, with the light of image source outgoing finally project imaging window (imaging plate, windshield etc.), the driver need not to bow just can directly see the picture, avoids the driver to bow in driving the in-process and sees the distraction that the panel board leads to, improves and drives factor of safety, also can bring better driving experience simultaneously.

Specifically, to take HUD based on plane mirror and curved surface mirror reflection formation of image as the example, the emergent light of HUD image source is emergent after plane mirror, curved surface mirror reflection in proper order, and the light of emergent can take place to reflect and remain in one side of cockpit on transparent formation of image window, gets into driver's eyes. These light rays entering the eyes of the driver make it possible for the driver to see a virtual image of the picture displayed on the HUD image source, which appears in space on the other side of the imaging window. Meanwhile, because the imaging window is transparent, the ambient light on the other side of the imaging window can still be transmitted into the eyes of the driver through the imaging window, so that the driver can see the HUD imaging and can observe the road condition outside the vehicle in the driving process without influencing the driver.

From the above, the HUD is an optical system designed by internal features, and reasonably and vividly displays some driving information in the driver's sight line region, and the driving information may include: the driver's eyes can focus on the far road, and the virtual image formed by the HUD is located on the near road compared with the eyes of the driver, so that the driver needs to adjust the eyes focused position from the far road to observe the virtual image formed by the HUD, thereby causing the visual convergence conflict, and causing the driver to easily generate fatigue, nausea and other undesirable conditions.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that proposes among the background art, the utility model discloses the first aspect provides a head-up display device, includes:

an image source;

a reflective component; and

a housing provided with a light outlet;

wherein, the image source with the reflection subassembly set up in the casing, the image source includes the light source and follows a plurality of liquid crystal imaging layers that light source light-emitting optical path arranged, switches the operating condition on a plurality of liquid crystal imaging layers, so that one in a plurality of liquid crystal imaging layers presents the formation of image state, and remaining liquid crystal imaging layer presents the printing opacity state, the light of light source outgoing forms formation of image light via the liquid crystal imaging layer under the formation of image state and carries out the outgoing, the reflection subassembly is used for right formation of image light reflects, via formation of image light after the reflection subassembly reflection passes through the light-emitting outlet outgoing, so that pass through the formation of image light of light-emitting outlet outgoing reflects in order to form the virtual image via outside imaging component.

In one possible implementation, the light source includes at least one of a red light source, a green light source, and a blue light source.

In a possible implementation manner, the method further includes:

a stereo conversion element;

the stereo conversion element is used for converting imaging light rays emitted by the image source into light rays capable of forming a stereo vision image, and comprises one of a light barrier type element, a lenticular lens type element and a directional light source type element.

In one possible implementation, when the stereoscopic conversion element is a light barrier type element, the stereoscopic conversion element includes:

the blocking unit is positioned on the light emergent light paths of the liquid crystal imaging layers;

the blocking unit is used for partially blocking the imaging light emitted by the plurality of liquid crystal imaging layers, so that the imaging light partially blocked by the blocking unit forms left eye light and right eye light which are respectively received by the left eye and the right eye of the same viewer, and the left eye image formed by the left eye light is different from the right eye image formed by the right eye light.

In one possible implementation, the barrier unit includes a liquid crystal barrier layer;

and switching the working state of the liquid crystal barrier layer to enable the liquid crystal barrier layer to be in a light-transmitting state or a non-light-transmitting state.

In one possible implementation, when the stereoscopic conversion element is a lenticular lens type element, the stereoscopic conversion element includes:

the columnar lens is positioned on the light emergent light paths of the liquid crystal imaging layers;

the cylindrical lens is used for refracting the imaging light emitted by the liquid crystal imaging layers, so that the imaging light refracted by the cylindrical lens forms left eye light and right eye light which are respectively received by the left eye and the right eye of the same observer, and the left eye image formed by the left eye light is different from the right eye image formed by the right eye light.

In one possible implementation, when the stereoscopic conversion element is a directional light source type element, the stereoscopic conversion element includes:

the pointing element is positioned on the light emergent light paths of the liquid crystal imaging layers;

wherein, a plurality of liquid crystal imaging layers will pass through the light of light source outgoing converts left eye light and right eye light respectively into, a plurality of liquid crystal imaging layers are according to chronogenesis left eye light and right eye light of difference outgoing, directional component is used for right left eye light and right eye light refracts, so that the pass through left eye light and right eye light after directional component refraction supply same viewer's left eye and right eye respectively to receive, the left eye image that left eye light formed with the right eye image that right eye light formed is different.

In one possible implementation, the light blocking element;

the light blocking element is used for blocking imaging light rays emitted from the image source at a preset angle.

In one possible implementation, the image source further includes:

a backlight assembly;

the backlight assembly is used for transmitting light emitted by the light source to the plurality of liquid crystal imaging layers.

In one possible implementation, the backlight assembly includes:

a light guide element, a direction control element, and a dispersion element;

the light guide element is used for transmitting light emitted by the light source, the direction control element is used for converging the light transmitted by the light guide element, and the dispersion element is used for dispersing the light converged by the direction control element.

In one possible implementation, the light guide element includes:

a solid lamp cup;

the solid lamp cup comprises a solid transparent component with a reflecting surface, the refractive index of the solid transparent component is larger than 1, the light-emitting surface of the solid transparent component faces the direction control element, the end part, far away from the light-emitting surface, of the solid transparent component is used for arranging a light source, and light emitted by the light source is totally reflected when being incident to the reflecting surface, so that the light totally reflected by the reflecting surface is emitted to the direction control element.

The light guide element includes:

a hollow lamp cup;

the hollow lamp cup comprises a hollow shell surrounded by a reflecting surface, an opening of the hollow lamp cup faces the direction control element, the end part, far away from the opening, of the hollow lamp cup is used for arranging a light source, and light emitted by the light source is totally reflected when being incident to the reflecting surface, so that the light reflected by the reflecting surface is emitted to the direction control element.

In one possible implementation, an anti-glare element;

the anti-dazzle device comprises a shell, a light outlet, an anti-dazzle element and a light source, wherein the light outlet of the shell is provided with a dustproof film, and the anti-dazzle element is used for shielding external light rays which are emitted to the dustproof film.

The utility model discloses the second aspect provides a vehicle, include:

the above-mentioned head-up display apparatus; and

an external imaging component.

In one possible implementation, the external imaging component includes a windshield including a first glass substrate and a second glass substrate disposed opposite a cartridge, with a wedge-shaped membrane disposed between the first glass substrate and the second glass substrate.

In a possible implementation manner, a selective reflection film is arranged on one side of the external imaging component, which is close to the light outlet;

the selective reflection film is used for reflecting the imaging light emitted through the light outlet.

In a possible implementation manner, a phase delay element is disposed on a side of the external imaging component close to the light outlet, the imaging light emitted through the light outlet is S-polarized light, and the phase delay element is configured to convert the S-polarized light emitted through the light outlet into P-polarized light or circularly polarized light.

In a possible implementation manner, a P-polarization reflective film is disposed on a side of the external imaging component close to the light outlet, and the imaging light emitted through the light outlet is P-polarized light.

In one possible implementation, the filter ink lens;

wherein the filter ink mirror is used for filtering the S polarized light.

In a possible implementation manner, the imaging light emitted through the light outlet is circularly polarized light or elliptically polarized light.

In a possible implementation manner, the imaging light emitted through the light outlet is P-polarized light.

The embodiment of the utility model provides an among the above-mentioned scheme that provides, the formation of image position of accessible change virtual image guarantees that the formation of image position of virtual image keeps the same with driver's eyes focused position, avoids producing the vergence conflict of vision, prevents that the driver from producing bad conditions such as tired, nausea, has improved the security of driving.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 shows a schematic structural diagram of a head-up display device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram showing the structure of the liquid crystal imaging layer in the present embodiment;

fig. 3 is a schematic structural view showing a head-up display device in the present embodiment displaying virtual images of different imaging distances;

FIG. 4 is a schematic structural view showing a light barrier element in the present embodiment;

fig. 5 shows a schematic structural view of a lenticular element in the present embodiment;

FIG. 6 is a schematic structural diagram of a light-source-oriented element in the present embodiment;

fig. 7 shows a schematic structural view of a light-blocking element in the present embodiment;

fig. 8 is a schematic structural view showing a backlight assembly in the present embodiment;

FIGS. 9-11 are schematic structural views showing a solid transparent member in the present embodiment;

FIGS. 12-13 show schematic structural views of the hollow lamp cup in this embodiment;

fig. 14 is a schematic structural view showing an antiglare element in the present embodiment;

FIG. 15 illustrates a schematic structural view of a wedge-shaped membrane within an external imaging component in a vehicle in accordance with another embodiment of the present invention;

fig. 16 shows a schematic structural view of the selective reflection film in the present embodiment;

fig. 17 shows a schematic configuration diagram of a phase delay element in the present embodiment;

fig. 18 is a schematic view showing the structure of the P-polarization reflective film in the present embodiment;

fig. 19 is a schematic view showing the structure of the filter sunglasses in the present embodiment;

fig. 20 is a block diagram showing a control system according to still another embodiment of the present invention.

In the figure: 100. an image source; 101. a light source; 102. a liquid crystal imaging layer; 103. a backlight assembly; 1031. a light guide element; 10311. a solid transparent member; 103111, a light emitting surface; 103112, a cavity; 103113, a groove; 10312. a hollow lamp cup; 103121, an opening; 10313. a collimating element; 1032. a direction control element; 1033. a dispersion element; 104. A virtual image; 110. a plane mirror; 120. a curved reflector; 130. a blocking unit; 140. a lenticular lens; 150. a pointing element; 160. a light blocking element; 170. a housing; 171. a light outlet; 172. a dust-proof film; 173. a light shielding portion; 180. An external imaging component; 181. a first glass substrate; 182. a second glass substrate; 183. a wedge-shaped membrane; 190. a selective reflection film; 200. a phase delay element; 210. a P-polarization reflective film; 220. a filter sunglass; 230. a control system; 221. a collection unit; 222. a calling unit; 223. and a processing unit.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

It should be noted that, for simplicity and clarity of description, the following description sets forth various embodiments of the present invention. Numerous details of the embodiments are set forth to provide an understanding of the principles of the invention. It is clear, however, that the solution according to the invention can be implemented without being limited to these details. Some embodiments are not described in detail, but rather only to give a framework, in order to avoid unnecessarily obscuring aspects of the present invention. Hereinafter, "including" means "including but not limited to", "according to … …" means "at least according to … …, but not limited to … … only". "first," "second," and the like are used merely as references to features and are not intended to limit the features in any way, such as in any order. In view of the language convention of chinese, the following description, when it does not specifically state the number of a component, means that the component may be one or more, or may be understood as at least one.

At present, the HUD technique can avoid the driver to look at the distraction that the panel board leads to at the in-process of driving the vehicle head-down, improves driving safety factor, also can bring better driving simultaneously and experience, consequently, uses car windshield to carry out the HUD that images and is receiving more and more attention.

The HUD is an optical system designed through internal features, reasonably and vividly displays some driving information in a driver sight region, and under the condition of normal driving, the imaging position of the virtual image 104 is generally not adjustable, so that the imaging position of the virtual image 104 is often inconsistent with the position focused by the eyes of the driver, for example, when the driver gazes at a distant road surface, the position focused by the eyes needs to be adjusted from the distant road surface to a nearby road surface to observe the virtual image formed by the HUD, thereby causing a vergence conflict, and causing the driver to easily generate fatigue, nausea and other undesirable conditions.

In order to solve the above technical problem, an embodiment of the present invention provides a head-up display device, as shown in fig. 1, including an image source 100 and a reflection assembly.

Specifically, the head-up display device may be mounted on various vehicles, such as a vehicle, a train, an airplane, a cruise ship, and the like, and in the present embodiment, the head-up display device is mounted on an automobile as an example.

In the example of fig. 1, the head-up display device further includes a housing 170, the housing 170 is provided with a light outlet 171, in a practical application scenario, the image source 100 and the reflection assembly are both disposed in the housing 170, the image source 100 is used for emitting imaging light, the imaging light emitted from the image source 100 is reflected by the reflection element, and the reflected imaging light is emitted through the light outlet 171, so that the emitted imaging light is reflected by the external imaging component 180 to form the virtual image 104.

In order to enable adjustment of the imaging distance of the virtual image 104, the imaging position of the virtual image 104 is made to coincide with the position at which the eyes of the driver are focused, and therefore, in the present embodiment, the image source 100 includes the light source 101 and the plurality of liquid crystal imaging layers 102 arranged along the light exit optical path of the light source 101.

Specifically, the Light source 101 is mainly used for Emitting Light, and the Light source 101 may include at least one electroluminescent element, which is excited by an electric Field to generate Light, such as a Light Emitting Diode (LED), an Organic Light-Emitting Diode (OLED), a Mini LED (Mini LED), a Micro LED (Micro LED), a Cold Cathode Fluorescent Lamp (CCFL), an LED Cold Light source 101211(Cold LED Light, CLL), an Electro Luminescence (EL), an electron Emission (Field Emission Display, FED), or a Quantum Dot Light source 101211(Quantum Dot, QD).

The light source 101 may include at least one of R (red)/G (green)/B (blue) monochromatic light sources 101, the light emitted after being turned on forms corresponding imaging light through the plurality of liquid crystal imaging layers 102, and if color display is to be implemented, the light source 101 may include R/G/B three-color light sources 101 at the same time, the R/G/B three-color light sources 101 are respectively turned on in a time-sequential manner, and the light emitted by the three-color light sources 101 respectively forms corresponding monochromatic images after passing through the liquid crystal imaging layers 102; since the time of the light emission interval between the three light sources 101 is short, human eyes cannot distinguish them according to the principle of persistence of vision, and the three monochromatic images incident to human eyes can be superimposed into a color image.

In this embodiment, the liquid crystal imaging layer 102 includes a plurality of liquid crystal layers, and according to the material characteristics of the liquid crystal, under the action of the external electric field, dipoles in the liquid crystal layer are oriented along the direction of the external electric field, which causes the original arrangement of molecules to change, so that the optical properties of the liquid crystal layer change, that is, in this embodiment, the liquid crystal imaging layer 102 can change its own working state under the action of the external electric field, and the working state can be specifically an imaging state and a light-transmitting state, when the working state of the liquid crystal imaging layer 102 is switched to the imaging state, the light emitted from the light source 101 can be converted into imaging light through the liquid crystal imaging layer 102, and when the working state of the liquid crystal imaging layer 102 is switched to the light-transmitting state, the light emitted from the light source 101 can be emitted through the liquid crystal imaging layer 102.

Based on the above, the plurality of liquid crystal imaging layers 102 are arranged along the light-emitting optical path of the light source 101, since the liquid crystal imaging layers 102 have a certain thickness and the position of the reflection assembly relative to the image source 100 is fixed, the distance between each liquid crystal imaging layer 102 and the reflection assembly is different, according to the imaging principle, the imaging distance of the virtual image 104 and the distance between the imaging light converted and emitted by the liquid crystal imaging layers 102 and the reflection assembly are in a direct proportion relationship, therefore, the imaging position of the virtual image 104 can be changed according to the position focused by the eyes of the driver by switching one liquid crystal imaging layer 102 of the plurality of liquid crystal imaging layers 102 to be in the imaging state and the rest liquid crystal imaging layers 102 to be in the imaging transparent state, so that the distance between the imaging light converted and emitted by the liquid crystal imaging layers 102 and the reflection assembly is changed, the visual convergence conflict is avoided, the bad conditions of fatigue, nausea and the like of the driver are prevented, and the driving safety is improved.

It should be noted that the number of the liquid crystal imaging layers 102 can be set as required, and the present invention is not limited to the specific example of the liquid crystal imaging layer 102.

In the following, the above solution of the present embodiment is further described with reference to a specific example, in the example of fig. 2, the number of the liquid crystal imaging layers 102 is three, and the three liquid crystal imaging layers 102 are L1, L2, and L3, respectively, so that it is also shown that the imaging position of the virtual image 104 can be changed three times by switching the three liquid crystal imaging layers 102 to present different operating states, and the switching schemes by which the three times are changed respectively are:

(1) one of the three liquid crystal imaging layers 102 close to the light source 101 is switched to an imaging state, and the remaining liquid crystal imaging layers 102 are in a light transmitting state;

firstly, light emitted from the light source 101 is converted into corresponding imaging light through the liquid crystal imaging layer 102 in an imaging state close to the light source 101, and then the imaging light sequentially passes through the two liquid crystal imaging layers 102 in a transparent state and enters the reflective element, that is, L3 is in an imaging state, and L1 and L2 are in transparent states;

(2) the liquid crystal imaging layer 102 located at the middle position among the three liquid crystal imaging layers 102 is switched to an imaging state, and the remaining liquid crystal imaging layers 102 are in a light-transmitting state;

firstly, light emitted from the light source 101 is incident to the liquid crystal imaging layer 102 in an imaging state at an intermediate position through the liquid crystal imaging layer 102 in a transparent state close to the light source 101, then the light is converted into corresponding imaging light through the liquid crystal imaging layer 102 in the imaging state at the intermediate position, and finally the imaging light is incident to the reflective element through the liquid crystal imaging layer 102 in the transparent state far away from the light source 101, that is, L2 is in an imaging state, and L1 and L3 are in a transparent state;

(3) one liquid crystal imaging layer 102 far away from the light source 101 in the three liquid crystal imaging layers 102 is switched to an imaging state, and the rest liquid crystal imaging layers 102 are in a light-transmitting state;

first, light emitted from the light source 101 sequentially passes through the two liquid crystal imaging layers 102 in the transparent state to enter the liquid crystal imaging layer 102 in the imaging state away from the light source 101, and then the light is converted into corresponding imaging light through the liquid crystal imaging layer 102 in the imaging state away from the light source 101 to enter the reflective element, that is, L1 is in the imaging state, and L2 and L3 are in the transparent state.

In the above three switching schemes, since the imaging distance of the virtual image 104 and the distance between the imaging light converted by the liquid crystal imaging layer 102 and the reflective component are in a direct proportion relationship, as shown in fig. 3, the position a is the imaging position of the virtual image 104 obtained by adopting scheme (1), the position B is the imaging position obtained by adopting scheme (2), the position C is the imaging position obtained by adopting scheme (3), the imaging distance of the virtual image 104 obtained by adopting scheme (1) is greater than the imaging distance of the virtual image 104 obtained by adopting scheme (2), the imaging distance of the virtual image 104 obtained by adopting scheme (2) is greater than the imaging distance of the virtual image 104 obtained by adopting scheme (3), and thus, the corresponding switching scheme can be further changed according to the position at which the eyes of the driver are focused, the imaging position of the virtual image 104 is changed, and the imaging position of the virtual image 104 and the position at which the eyes of the driver are focused are ensured to be the same, the visual convergence conflict is avoided, the bad conditions of fatigue, nausea and the like of the driver are prevented, and the driving safety is improved.

In the actual use process to head-up display device, the actual road conditions that the driver observed are three-dimensional stereo, therefore the two-dimensional picture that HUD formed can't laminate with actual road conditions and show.

In order to realize that the virtual image 104 formed by the imaging light rays emitted from the image source 100 can be displayed in a fitting manner with actual road conditions, so that the virtual image 104 is visually fused with a real environment, and the visual perception of a driver is improved, therefore, in some optional implementation manners of the embodiment, the head-up display device further includes a stereoscopic conversion element, wherein the stereoscopic conversion element is configured to convert the imaging light rays emitted from the image source 100 into light rays capable of forming a stereoscopic image.

In this embodiment, the three-dimensional conversion elements may specifically include three types, which are respectively: the light barrier device, the lenticular lens 140 device and the directional light source 101 device are described below:

(1) light barrier element

When the three-dimensional conversion element is an optical barrier type element, the three-dimensional conversion element comprises: the blocking unit 130 is located on the light exit path of the liquid crystal imaging layers 102, wherein the blocking unit 130 is configured to partially block the imaging light exiting from the liquid crystal imaging layers 102, so that the imaging light blocked by the blocking unit 130 forms a left eye light received by a left eye and a right eye light received by a right eye of the same viewer, and a left eye image formed by the left eye light is different from a right eye image formed by the right eye light.

Here, the viewer may be considered as a driver, the blocking unit 130 includes a plurality of pixels, as shown in fig. 4, the image source 100 includes 8 columns of pixels, and the blocking unit 130 includes 4 pixels for illustration, since the blocking unit 130 can block light, light emitted from some pixels (R1, R2, R3, R4 in fig. 4) cannot reach the left eye of the same viewer, so that the left eye can only see light emitted from other pixels (L1, L2, L3, L4 in fig. 4), and light emitted from other pixels forms corresponding left eye light which can be received by the left eye; the same principle is that: the right eye can only see the light emitted by some pixels (R1, R2, R3 and R4 in fig. 4) and cannot see the light emitted by other pixels (L1, L2, L3 and L4 in fig. 4), so that the blocking unit 130 can divide the above 8 columns of pixels into two parts, and the light emitted by some pixels can only reach the left eye position and is received by the left eye of the same viewer, such as L1, L2, L3 and L4 in fig. 4; while the light emitted from the other part of pixels can only reach the right eye position and be received by the right eye of the same viewer, as shown in fig. 4, R1, R2, R3 and R4, the imaging light is divided into left eye light and right eye light, and the left eye image formed by the left eye light is different from the right eye image formed by the right eye light, so that the stereoscopic imaging effect can be further achieved.

Optionally, the blocking unit 130 may be specifically a liquid crystal blocking layer, the liquid crystal blocking layer is made of a liquid crystal material, an electric field is formed by an external voltage, and a working state of the liquid crystal blocking layer is changed, so that the liquid crystal blocking layer is in a light-transmitting state or a non-light-transmitting state, and when the working state of the liquid crystal blocking layer is light-tight, the imaging light is partially blocked, thereby realizing stereoscopic display.

Alternatively, the blocking unit 130 may be embodied as a grating, and the grating includes a plurality of vertically arranged opaque stripes, and the stripes partially block the imaging light, so as to implement stereoscopic display.

(2) Cylindrical lens 140 type element

When the stereoscopic conversion element is a lenticular lens 140 type element, the stereoscopic conversion element includes a lenticular lens 140 located on the light-emitting path of the liquid crystal imaging layers 102, wherein the lenticular lens 140 is configured to refract the imaging light emitted from the liquid crystal imaging layers 102, so that the imaging light refracted by the lenticular lens 140 forms a left eye light and a right eye light respectively received by the left eye and the right eye of the same viewer, and a left eye image formed by the left eye light is different from a right eye image formed by the right eye light.

Here, the observer may be considered as a driver, the lenticular lens 140 includes a plurality of lenticular lenses, as shown in fig. 5, and the image source 100 includes 8 columns of pixels, and the lenticular lens 140 includes 4 pixels for illustration, wherein one lenticular lens 140 covers two adjacent pixels, and based on the refractive characteristics, by setting the curved surface of the lenticular lens 140, the light emitted from one column of pixels is refracted by the lenticular lens 140 to form a left eye light capable of being received by a left eye, and the light emitted from the adjacent column of pixels is refracted by the lenticular lens 140 to form a right eye light capable of being received by a right eye, for example, in fig. 5, the light emitted from the pixel R1 is refracted by the lenticular lens 140 to form a right eye light capable of being received by a right eye, and the light emitted from the pixel L1 is refracted by the lenticular lens 140 to form a right eye light capable of being received by a left eye, through dividing into the formation of image light left eye light and right eye light, and the left eye image that left eye light formed is different with the right eye image that right eye light formed, consequently, and then can realize the stereoscopic imaging effect, it should be noted that, in this embodiment, the size and the curved surface of lenticular lens 140 are through the special design behind the precision calculation, and then image in specific position, this kind of mode need not the viewer to wear special glasses can watch the stereoscopic image, but need the viewer to watch better stereoscopic vision effect in specific position.

Optionally, the cylindrical lens 140 may include one or more of a plano-convex cylindrical lens, a biconvex cylindrical lens, a meniscus cylindrical lens, an anisotropic cylindrical lens, and a combination of the above lenses, that is, the cylindrical lens may be a plano-convex cylindrical lens, a biconvex cylindrical lens, a meniscus cylindrical lens, a cylinder lens, a special-shaped cylindrical lens, a lens combination (e.g., a combination of a plano-convex cylindrical lens and a meniscus cylindrical lens), and the like.

Alternatively, the refractive powers of the plurality of lenticular lenses 140 may be set to be different, and since the plurality of lenticular lenses 140 are at different positions, the different refractive powers are more advantageous for refracting light toward the viewer.

(3) 101-type element of directional light source

When the stereoscopic conversion element is a directional light source 101 type element, the stereoscopic conversion element includes a directional element 150 located on the light-emitting path of the liquid crystal imaging layers 102, wherein the liquid crystal imaging layers 102 respectively convert the light emitted from the light source 101 into left eye light and right eye light, the liquid crystal imaging layers 102 respectively emit the left eye light and right eye light according to a time sequence, and the directional element 150 is used for refracting the left eye light and the right eye light, so that the left eye light and the right eye light refracted by the directional element 150 are respectively received by the left eye and the right eye of the same viewer, and the left eye image formed by the left eye light is different from the right eye image formed by the right eye light.

Here, the viewer can be considered as a driver, and the directional light source 101 type element needs to be matched with two sets of light sources 101, and the images with different contents are respectively entered into the left eye and the right eye of the viewer in a sequencing manner in cooperation with a driving method of fast refresh display.

Referring to fig. 6, the pointing device 150 includes a plurality of pointing devices 150, the pointing device 150 includes a prism, and the prism structure is provided with a cylindrical or non-cylindrical curved elongated lens, and the light source 101 can provide light in a side-in or back-in manner, and fig. 6 illustrates the back-in light source 101 as an example.

The light source 101 specifically includes one or more left-eye light sources 101 corresponding to a left eye and one or more right-eye light sources 101 corresponding to a right eye, the left-eye light source 101 and the right-eye light source 101 may be turned on or off according to a time sequence, at a current time, the left-eye light source 101 is turned on, the right-eye light source 101 is turned off, light emitted from the left-eye light source 101 cooperates with the plurality of liquid crystal imaging layers 102 to form corresponding left-eye light (for example, solid-line light in fig. 6), at a next time, the right-eye light source 101 is turned on, the left-eye light source 101 is turned off, light emitted from the right-eye light source 101 cooperates with the plurality of liquid crystal imaging layers 102 to form corresponding right-eye light (for example, dashed-line light in fig. 6), and because the frequency of image refreshing display is fast and exceeds the limit of human eye discernability, according to the principle of the persistence of vision.

Alternatively, the elongated lenses may comprise cylindrical or non-cylindrical lenses, such as parabolic lenses.

Optionally, the prism structure is a triangular prism structure.

As can be seen from the above, the image source 100 in the present embodiment is configured to emit imaging light, the reflective element is configured to reflect the imaging light, the reflected imaging light exits through the light exit 171 and is further reflected by the external imaging component 180 to form the virtual image 104, and in an embodiment, the reflective element may specifically include the curved mirror 120.

The curved mirror 120 may be a concave mirror, and the concave mirror may converge the imaging light emitted from the image source 100 to form the virtual image 104.

From the imaging properties of the curved mirror 120, it can be known that: the image distance of the virtual image 104 formed by the imaging light rays is increased along with the increase of the optical distance between the image source 100 and the curved reflector 120, that is, the larger the optical distance between the image source 100 and the curved reflector 120, the larger the distance between the driver and the image imaged by the curved reflector 120, and therefore, the reflecting element may further include a flat reflector 110, and by arranging the corresponding flat reflector 110 between the image source 100 and the curved reflector 120, the imaging light rays are increased by the corresponding reflection times and the propagation path thereof is increased, so that the optical distance between the image source 100 and the curved reflector 120 is increased, and the distance between the driver and the image imaged by the curved reflector 120 is increased.

The curved mirror 120 can enlarge an image and provide a longer imaging distance, and can compensate for image distortion caused by the external imaging component 180, if the external imaging component 180 is a curved surface, the image distortion can be caused after the imaging light is reflected by the external imaging component 180, the surface design of the curved mirror 120 can counteract the distortion, and the planar mirror 110 can improve the space utilization rate and compress the volume of the head-up display device.

In an alternative implementation, the head-up display device further includes a light blocking element 160, as shown in fig. 7, the light blocking element 160 is disposed at a side of the light emitting surface 103111 of the image source 100, the light blocking element 160 is used for blocking the imaging light emitted from the image source 100 at a preset angle, during normal use, the driver can see the virtual image 104 formed by the external imaging component 180, and if the driver can also see the image formed directly by the image source 100, the driver's observation can be affected, the use effect of the head-up display device can be affected, and therefore, the imaging light which may be directly received by the driver can be blocked by disposing the light blocking element 160.

Specifically, the structure and operation principle of the light blocking element 160 are shown in fig. 7, and the light blocking element 160 includes a plurality of light blocking barriers, wherein the plurality of light blocking barriers are distributed in an array to physically block the imaging light from propagating in some directions, and the height and width of the light blocking barriers are designed to limit the angle of the imaging light that can be seen by the driver, for example, in the example of fig. 7, the light blocking element 160 is arranged to limit the light within the viewing angle γ, such as the viewing angle γ is 60 °, 70 ° or 80 °, that is, when the human eye of the viewer is located within the viewing angle γ, the imaging light that directly exits from the image source 100 can be observed, and when the human eye of the viewer is located outside the viewing angle γ, the imaging light that directly exits from the image source 100 cannot be observed.

In some optional implementations of the present embodiment, the image source 100 further includes a backlight assembly 103, wherein the backlight assembly 103 is configured to transmit the light emitted from the light source 101 to the plurality of liquid crystal imaging layers 102.

Further, as shown in fig. 8, the backlight assembly 103 includes a light guide element 1031, a direction control element 1032 and a dispersion element 1033, wherein the light guide element 1031 is used for transmitting the light emitted from the light source 101, the direction control element 1032 is used for converging the light transmitted through the light guide element 1031, and the dispersion element 1033 is used for dispersing the light converged through the direction control element 1032.

Specifically, as shown in fig. 9, the light guide element 1031 includes a solid transparent member 10311 having a light reflecting surface, the light emitting surface 103111 of the solid transparent member 10311 faces the direction control element 1032, and the light source 101 is disposed at an end of the solid transparent member 10311 away from the light emitting surface 103111, it is understood that the light beam generated by the light source 101 has a divergence angle (the maximum included angle between the normal line of the center of the light source 101 and the outgoing light ray), and thus, the light rays emitted from the light source 101 exit in various directions within the divergence angle at a plurality of angles (the angle between the normal line of the center of the light source 101 and the outgoing light ray), wherein the light rays having a smaller divergence angle (the included angle with the normal line of the center of the light source 101 is smaller, such as 10 degrees, 15 degrees, 20 degrees, etc.) exit from the light source 101 directly to the light emitting surface 103111, and the light rays having a larger divergence angle (the included angle with, 45 degrees, 60 degrees, etc.) can be emitted from the light source 101 to the reflective surface in the solid transparent component 10311 and totally reflected, and the light rays after total reflection can be gathered, and accordingly, the utilization rate of the light source 101 can be improved, preferably, the surface shape of the reflective surface of the solid transparent component 10311 can be designed to change the light rays after total reflection by the reflective surface into collimated light rays, wherein the collimated light rays are parallel or nearly parallel light rays, the divergence angle of the collimated light rays is small, and the imaging is facilitated.

The refractive index of the solid transparent member 10311 is greater than 1, and the light-reflecting surface of the solid transparent member 10311 includes a curved surface shape, a free-form surface shape, a conical surface shape, or the like; the light emitting surface 103111 of the solid transparent member 10311 faces the direction control element 1032, fig. 9 schematically shows a schematic diagram of transmission of light emitted from the light source 101 through the solid transparent member 10311, because the refractive index of the solid transparent member 10311 is greater than 1, and the peripheral medium of the solid transparent member 10311 is generally air (refractive index is 1), when the light emitted from the light source 101 reaches the inner surface of the solid transparent member 10311, when the light is emitted from the optically dense medium (i.e., the solid transparent member 10311) to the optically thinner medium (i.e., air), total reflection can occur when the incident angle of the light reaches a preset angle, that is, the light reflecting surface of the solid transparent member 10311 specifically refers to the inner surface of the solid transparent member 10311; the light exit surface 103111 of the solid transparent member 10311 faces the direction control element 1032, and by designing the shape of the solid transparent member 10311, part of the light emitted from the light source 101 can be emitted after being totally reflected with a reduced divergence angle; the other part of the light is directly transmitted and emitted through the solid transparent member 10311, and after being emitted to the direction guide element through the light emitting surface 103111, the two parts of the light are emitted to the image generation layer through the direction guide element and the dispersion element 1033 in sequence, so that the conversion efficiency of the image generation layer to the imaging light can be improved.

In some optional implementations of the present embodiment, a cross-sectional shape of the light exit surface 103111 along the light propagation direction includes at least one shape of a circle, an ellipse, a rectangle, a trapezoid, a parallelogram, or a square; the shape of the end portion includes at least one of a circle, an ellipse, a rectangle, a trapezoid, a parallelogram, or a square.

Preferably, as shown in fig. 10, the end of the solid transparent member 10311 is provided with a cavity 103112, the light source 101 is disposed in the cavity 103112, and the collimating element 10313 is disposed on the surface of the cavity 103112 close to the light-emitting surface 103111. The collimating element 10313 can collimate and emit light rays emitted by the light source 101 in the solid transparent member 10311 and having a small divergence angle, and other light rays having a large divergence angle are emitted after being reflected on the light reflecting surface of the solid transparent member 10311, preferably, the light rays totally reflected by the light reflecting surface can be changed into collimated light rays by designing the surface shape of the light reflecting surface of the solid transparent member 10311, further, the collimating element 10313 is a collimating lens, the light source 101 is arranged at the focus of the collimating lens, and the collimating lens can be made of the same material as the solid transparent member 10311, so that the light rays are integrated integrally.

Alternatively, in another preferred implementation, as shown in fig. 11, the end of the solid transparent member 10311 where the light source 101 is disposed is provided with a cavity 103112, and the light-emitting surface 103111 of the solid transparent member 10311 is provided with a groove 103113 extending toward the end, and the bottom surface of the groove 103113 near the end is provided with a collimating element 10313. The light source 101 is arranged in the cavity 103112, the collimating element 10313 collimates the light emitted by the light source 101 in the solid transparent member 10311 and then emits the light, other light with larger divergence angle is totally reflected in the solid transparent member 10311 and then emits the light, and the light totally reflected by the light reflecting surface can be changed into collimated light by designing the surface shape of the light reflecting surface of the solid transparent member 10311; optionally, the collimating element 10313 is a collimating lens, the light source 101 is disposed at a focal point of the collimating lens, and the collimating lens may be made of the same material as the solid transparent member 10311, so as to facilitate integration.

In some optional implementations of this embodiment, the light guide element 1031 may also adopt the design of a hollow lamp cup 10312, as shown in fig. 12, the hollow lamp cup 10312 includes a hollow housing 170 surrounded by a light reflecting surface, the opening 103121 of the hollow lamp cup 10312 faces the direction control element 1032, the end of the hollow lamp cup 10312 away from the opening 103121 is used for disposing the light source 101, and the light emitted from the light source 101 is reflected when entering the light reflecting surface, so that the light reflected by the light reflecting surface exits to the direction control element 1032.

Specifically, the light reflecting surface of the hollow shell 170 comprises a light reflecting surface formed by aluminum plating, silver plating, other metal plating or medium film plating, light can be reflected on the light reflecting surface, the light emitted by the light source 101 with a large divergence angle is reflected on the light reflecting surface of the hollow shell 170 through the arrangement of the hollow shell 170, the angle of the light after reflection is changed and gathered towards the center, the utilization rate of the light emitted by the light source 101 can be improved, and the light efficiency of the head-up display device is further improved.

In some alternative implementations of the present embodiment, the shape of the opening 103121 includes at least one of a circle, an ellipse, a rectangle, a trapezoid, a parallelogram, or a square; the shape of the end of hollow lamp cup 10312 remote from opening 103121 comprises at least one of a circle, oval, rectangle, trapezoid, parallelogram, or square.

In some optional implementations of the present embodiment, the hollow housing 170 may specifically include at least one of a parabolic shape, a conic shape, or a free-form surface shape, and the shape of the hollow housing 170 specifically refers to the shape of the light reflecting surface; it is understood that the shape of the hollow housing 170 may be different from the shape of the light reflecting surface, as long as the light reflecting surface is in the shape that allows light to be reflected as described above; for convenience of illustration, the hollow housing 170 is shaped to conform to the reflective surface.

On the basis of the above implementation, a corresponding collimating element 10313 may also be disposed on the hollow lamp cup 10312, and the collimating element 10313 may be a collimating lens or a collimating film, and the collimating lens includes one or more of a convex lens, a fresnel lens, and a lens combination (e.g., a combination of a convex lens and a concave lens, a combination of a fresnel lens and a concave lens, etc.). Specifically, the collimating element 10313 may be a convex lens, and the light source 101 may be disposed at a focal length of the convex lens, that is, a distance between the convex lens and the light source 101 is a focal length of the convex lens, so that light rays emitted from the light source 101 in different directions can be emitted in parallel after passing through the collimating element 10313. Alternatively, the collimating element 10313 may be a collimating Film, such as a BEF Film (Brightness Enhancement Film), for adjusting the emitting direction of the light rays to a predetermined angle range, for example, to focus the light rays to an angle range of ± 35 ° from the normal of the collimating Film. The collimating element 10313 may cover all the light rays emitted from the light source 101, or may cover a part of the light rays emitted from the light source 101, which is not limited in this embodiment. The collimated parallel light rays are subsequently transmitted to the image generation layer, the light ray divergence angle is small, the light ray consistency is good, and therefore the conversion efficiency of the image generation layer to the imaging light rays can be improved, and the light effect of the head-up display device is further improved.

Specifically, as shown in fig. 13, the collimating element 10313 is disposed inside the hollow housing 170 and configured to convert light passing through the collimating element 10313 into collimated light, optionally, the collimating element 10313 may be a collimating lens or a collimating film, and as illustrated by the collimating lens in fig. 13, the collimating element 10313 may be a convex lens, and then the light source 101 may be disposed at a focal length of the convex lens, that is, a distance between the convex lens and the light source 101 is a focal length of the convex lens, so that light emitted by the light source 101 in different directions can be collimated and emitted after passing through the collimating element 10313. Specifically, the collimating element 10313 collimates a portion of the light rays transmitted in the hollow housing 170 and then emits the collimated light rays to the direction control element 1032, and the portion of the light rays, specifically, the central light rays with a smaller divergence angle emitted by the light source 101, are converted into parallel or nearly parallel light rays after passing through the collimating element 10313; the light emitted from the light source 101 with a large divergence angle is reflected by the reflective surface of the hollow housing 170 and converted into collimated light, so that the light emitted from the light source 101 can be collected and collimated more effectively by combining the collimating element 10313 and the hollow housing 170, and the utilization rate of the light is further improved.

By arranging the light guide element 1031 made of solid transparent material or designed by the hollow shell 170, light rays emitted by the light source 101 and having a larger divergence angle are reflected on the reflecting surface of the hollow shell 170, and the reflected light rays are converted into collimated light rays, so that the utilization rate of the light rays emitted by the light source 101 by the head-up display equipment can be improved, and the light efficiency of the head-up display equipment is further improved; further through setting up collimating element 10313, can more effectively carry out the collimation to the light of light source 101 outgoing, turn into parallel or nearly parallel collimation light with light, the parallel light divergence angle after the collimation is very little, and the light uniformity is better, and the light utilization ratio further improves, and then promotes head-up display equipment's picture luminance and reduction consumption.

The direction control element 1032 is used for controlling the direction of the light emitted from the reflective light guide element 1031, and converging the light to a predetermined range, so that the light can be further converged, and the utilization rate of the light can be improved. The direction control element 1032 may be a lens or a lens combination, such as a convex lens, a fresnel lens or a lens combination, etc., and is schematically illustrated in fig. 8 by taking a convex lens as an example. It is understood that the predetermined range may be a point, such as a focal point of a convex lens, or a smaller area, and the direction control element 1032 is arranged to further converge the high-angle light emitted from the light source 101, so as to improve the light utilization rate.

The diffusion element 1033 diffuses the light into a light beam having a distribution angle, and the smaller the diffusion angle, the higher the brightness of the light beam, and vice versa. The dispersion control element is used for dispersing the collected light at a certain angle, so that the diffusion degree of the light is increased, and the light can be uniformly distributed in a certain area, as shown in fig. 8. In particular, the dispersive element 1033 is a diffractive optical element, such as a beam shaper (beam shaper), which disperses the light beam and forms a beam with a specific cross-sectional shape, including but not limited to a line, a circle, an ellipse, a square, or a rectangle. By controlling the microstructure of the diffractive optical element, the dispersion angle, the cross-sectional shape and the like of light can be accurately controlled, and the dispersion effect can be accurately controlled.

In the embodiment, each optical element in the head-up display device is accommodated in the housing 170, and the imaging light emitted from the image source 100 is reflected by the reflection element and then emitted through the light outlet 171 of the housing 170, so as to avoid the damage of the optical element in the housing 170 due to the external dust and impurities entering the housing 170 through the light outlet 171, and therefore, a corresponding dustproof film 172 may be disposed at the light outlet 171 of the housing 170 to achieve the purpose of dust prevention.

Furthermore, the dustproof film 172 is generally made of a transparent material, and the dustproof film 172 is located at the light outlet 171 of the housing 170, and when external light such as sunlight or other vehicle lights enters the dustproof film 172, the external light may be reflected on the surface of the dustproof film 172, and the reflected light may enter human eyes of a driver, so that strong glare may be generated, and a certain influence may be exerted on the sight of the driver.

In order to eliminate the generation of glare, in the present embodiment, an anti-glare element may be disposed at the light outlet 171 of the housing 170, specifically, as shown in fig. 14, the anti-glare element may be a shielding plate, and the anti-glare element is used to shield external light rays emitted to the dust-proof film 172, so as to achieve an anti-glare effect and improve driving safety of a driver.

Another embodiment of the present invention provides a vehicle including an external imaging component 180 and a head-up display device as set forth in the previous embodiment.

Specifically, the external imaging component 180 may be specifically a windshield of a vehicle, in an actual imaging process, after the imaging light emitted from the image source 100 is emitted through the reflection assembly, the imaging light is finally reflected on the external imaging component 180, and the reflected imaging light is emitted to the eyes of the driver, that is, the eye box area, so that the driver can see the virtual image 104 formed on one side of the external device away from the head-up display apparatus, without affecting the observation of the external environment.

Alternatively, the position at which the imaging light reflects the virtual image 104 via the external imaging component 180 is at or near the focal plane of the windshield. In this case, according to the curved-surface imaging rule, the virtual image 104 formed by the imaging light rays emitted from the image source 100 sequentially passing through the reflection assembly and the windshield is formed at a longer distance or even an infinite distance, and is suitable for use in an AR-HUD.

When the formation of image light through light-emitting port 171 outgoing incides to windshield and reflects, partly formation of image light can reflect on windshield is close to the one side of light-emitting port 171, and another partly formation of image light can get into in the windshield refraction and reflect on the one side that light-emitting port 171 was kept away from to windshield, like this, two parts light is respectively via windshield in, get into driver's eye behind the surface reflection, the ghost image has just appeared in the actual impression of people's eye, not only influence the user and to the discernment of virtual image, the potential safety hazard still appears easily at the in-process of driving the car, consequently, need propose the solution of eliminating the ghost image.

In an alternative implementation, as shown in fig. 15, the windshield includes a first glass substrate 181 and a second glass substrate 182 disposed opposite the cassette, with a wedge-shaped film 183 disposed between the first glass substrate 181 and the second glass substrate 182.

Specifically, the first glass substrate 181 is closer to the head-up display device than the second glass substrate 182, a part of the imaging light emitted from the head-up display device is reflected on the surface of the first glass substrate 181 close to the light outlet 171, another part of the imaging light enters the first glass substrate 181 and is refracted to the wedge-shaped film 183, another part of the imaging light refracted to the wedge-shaped film 183 is reflected in the wedge-shaped film 183 for multiple times and is emitted through the first glass substrate 181, and another part of the imaging light after being emitted is overlapped with the optical path of a part of the imaging light reflected on the surface of the first glass substrate 181 close to the light outlet 171, so that the purpose of ghost elimination is achieved.

In an alternative implementation, as shown in fig. 16, a selective reflection film 190 is disposed on a side of the external imaging component 180 close to the light outlet 171, wherein the selective reflection film 190 is used for reflecting the imaging light emitted through the light outlet 171.

Specifically, the selective reflection film 190 is additionally arranged on the side of the external imaging component 180 close to the light outlet 171, and the selective reflection film 190 only reflects the imaging light emitted from the image source 100, for example, when the light source 101 includes a white LED with RGB mixed light, the optical imaging light emitted from the image source 100 includes light in three wavelength bands of RGB, and the selective reflection film 190 only reflects the RGB light and transmits other light, so that the imaging light is reflected and imaged on the selective reflection film 190, and is not reflected on the side of the windshield far away from the light outlet 171, thereby achieving the purpose of eliminating the ghost image.

In an alternative implementation, as shown in fig. 17, a phase retardation element 200 is disposed on a side of the external imaging component 180 close to the light outlet 171, the imaging light emitted through the light outlet 171 is S-polarized light, and the phase retardation element 200 is configured to convert the S-polarized light emitted through the light outlet 171 into P-polarized light or circularly polarized light.

Specifically, the phase retardation element 200 may be an 1/4 wave plate or a 1/2 wave plate (in fig. 17, the phase retardation element 200 is a 1/2 wave plate), the phase retardation element 200 may be attached to a side of the external imaging component 180 close to the light exit 171, the S-polarized light exiting from the light exit 171 is converted into circularly polarized light or P-polarized light after passing through the phase retardation element 200, and the reflection rate of the circularly polarized light or the P-polarized light on the surface of the external imaging component 180 is low, so that the purpose of eliminating ghost images can be achieved.

In an alternative implementation, as shown in fig. 18, a P-polarized reflective film 210 is disposed on a side of the external imaging component 180 close to the light outlet 171, and the imaging light emitted through the light outlet 171 is P-polarized light.

Specifically, in the present embodiment, when the imaging light emitted through the light outlet 171 enters the external imaging component 180, a part of the P-polarized light is reflected by the P-polarized reflective film 210 to the eyes of the driver, and another part of the P-polarized light enters the windshield and is refracted to the surface of the windshield away from the light outlet 171.

In an alternative implementation, as shown in fig. 19, a filter ink mirror 220 is also included.

Specifically, the filter ink mirror 220 in this embodiment is used for filtering S-polarized light, and in some cases, if the luminance of the external light or the imaging light emitted from the head-up display device is too high when the driver drives the vehicle, the eye of the driver may be visually fatigued after long-time viewing, so that, in order to reduce the luminance of the light incident on the eye of the driver, the driver may wear the filter ink mirror 220 in this embodiment to filter the S-polarized light included in the external light or the imaging light emitted from the head-up display device, so as to reduce the luminance and alleviate the eye fatigue of the driver.

Optionally, the imaging light emitted through the light outlet 171 is circularly polarized light or elliptically polarized light.

Specifically, since the optical filter 220 can filter S-polarized light, the imaging light exiting through the light outlet 171 can be set to be circularly polarized light or elliptically polarized light, and since the circularly polarized light and the elliptically polarized light can generate P-polarized light components, the driver can also see the virtual image 104 formed by the imaging light when wearing the optical filter 220.

Optionally, the imaging light emitted through the light outlet 171 is P-polarized light.

Specifically, since the optical filter 220 can filter S-polarized light, the imaging light exiting through the light outlet 171 can be set to P-polarized light, so that the driver can see the virtual image 104 formed by the imaging light even when wearing the optical filter 220.

In another embodiment of the present invention, a control system 230 is provided, which is applied to the head-up display device or the vehicle in the above-mentioned embodiment, referring to fig. 20, the control system 230 includes a collecting unit 221, a retrieving unit 222 and a processing unit 223.

Specifically, in the present embodiment, the acquisition unit 221, the retrieval unit 222, and the processing unit 223 may be connected with the head-up display device in a wired or wireless manner, the acquisition unit 221 is mainly used for acquiring real-time data, the retrieval unit 222 retrieves pre-stored adjustment information matched with the real-time data based on the real-time data, the processing unit 223 generates a control signal based on the adjustment information, and the liquid crystal imaging layers 102 switch the working state in response to the control signal, so that one liquid crystal imaging layer 102 of the liquid crystal imaging layers 102 assumes an imaging state, and the rest of the liquid crystal imaging layers 102 assume a light-transmitting state, thereby adjusting the imaging position of the virtual image 104 formed by the imaging light emitted by the head-up display device via the external imaging component 180.

Here, the acquisition unit 221 may be a data acquisition unit 221, such as: the real-time data collected by the collecting unit 221 includes visual information of a viewer and/or vehicle speed information of a vehicle driven by the viewer, it should be noted that the viewer should be understood as a driver, the visual information may include an eyeball focus position of the driver, the collecting unit 221 may collect the visual information of the driver and the vehicle speed information of the vehicle in real time while the driver is driving the vehicle, after the collection is completed, the retrieving unit 222 may retrieve adjustment information matching the real-time data according to the collected real-time data, it should be understood that the adjustment information includes a plurality of adjustment information, the plurality of adjustment information are matched with different real-time data one by one, and the related matching relationship may be stored in a storage unit of a database in advance, for example, the retrieving unit 222 may retrieve the matching adjustment information from the storage unit according to the different real-time data collected at different times, the processing unit 223 can generate a control signal according to the adjustment information, so that the plurality of liquid crystal imaging layers 102 switch their operating states based on the control signal, thereby achieving the purpose of changing the imaging position of the virtual image 104, ensuring that the imaging position of the virtual image 104 can be kept consistent with the position focused by the eyes of the driver, avoiding the occurrence of convergence conflict, preventing the driver from generating fatigue, nausea and other adverse conditions, and improving the driving safety.

In the following, the above scheme of this embodiment is further described with reference to specific examples, where three liquid crystal imaging layers 102 are included, the three liquid crystal images are sequentially arranged along the light-emitting optical path of the light source 101, and the number of the liquid crystal imaging layers 102 is three, which also indicates that the imaging position of the virtual image 104 can be changed three times by respectively switching the three liquid crystal imaging layers 102 to present different working states, and the switching schemes depended on by the three times are:

(1) when the liquid crystal imaging layer 102 close to the light source 101 among the three liquid crystal imaging layers 102 is switched to an imaging state in response to a control signal and the remaining liquid crystal imaging layers 102 are in an imaging transmission state, imaging light emitted through the light outlet 171 is reflected by the external imaging part 180 to form a virtual image 104 of a first preset distance;

(2) when the liquid crystal imaging layer 102 located at the middle position among the three liquid crystal imaging layers 102 is switched to an imaging state in response to the control signal, and the remaining liquid crystal imaging layers 102 are in an imaging transmission state, imaging light emitted through the light outlet 171 is reflected by the external imaging part 180 to form a second preset distance;

(3) when the liquid crystal imaging layers 102 far from the light source 101 among the three liquid crystal imaging layers 102 are switched to an imaging state in response to a control signal, and the remaining liquid crystal imaging layers 102 are in an imaging transparent state, imaging light rays emitted through the light outlet 171 are reflected by the external imaging component 180 to form a virtual image 104 at a third preset distance;

it should be noted that, in the above three schemes, the second preset distance is greater than the first preset distance and is smaller than the third preset distance.

That is, in the above-described example, when the number of the liquid crystal imaging layers 102 is three, the head-up display apparatus may form the virtual images 104 at three different imaging distances, respectively, and the virtual images 104 at three different imaging distances correspond to different eye-focused positions of the driver, respectively, and further, by increasing the number of the liquid crystal imaging layers 102, the head-up display apparatus may form the virtual images 104 at a plurality of different imaging distances, thereby ensuring that the imaging positions of the virtual images 104 may be consistent with the eye-focused positions of the driver, avoiding the occurrence of convergence conflict, preventing the driver from generating bad conditions such as fatigue and nausea, and improving the driving safety.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A head-up display device characterized by comprising:

an image source;

a reflective component; and

a housing provided with a light outlet;

2. Head-up display device according to claim 1,

the light source includes at least one of a red light source, a green light source, and a blue light source.

3. Head-up display device according to claim 1,

also includes:

a stereo conversion element;

4. Head-up display device according to claim 3,

when the stereoscopic conversion element is a light barrier type element, the stereoscopic conversion element includes:

5. Head-up display device according to claim 4,

the barrier unit comprises a liquid crystal barrier layer;

6. Head-up display device according to claim 3,

when the stereoscopic conversion element is a lenticular lens type element, the stereoscopic conversion element includes:

7. Head-up display device according to claim 3,

when the stereo conversion element is a directional light source type element, the stereo conversion element comprises:

8. The head-up display apparatus according to claim 1, further comprising:

a light blocking element;

9. Head-up display device according to claim 1,

the image source further includes:

a backlight assembly;

10. Head-up display device according to claim 9,

the backlight assembly includes:

a light guide element, a direction control element, and a dispersion element;

11. Head-up display device according to claim 10,

the light guide element includes:

a solid lamp cup;

12. Head-up display device according to claim 10,

the light guide element includes:

a hollow lamp cup;

the hollow lamp cup comprises a hollow shell surrounded by a reflecting surface, an opening of the hollow lamp cup faces the direction control element, the end part, far away from the opening, of the hollow lamp cup is used for arranging a light source, light emitted by the light source is totally reflected when being incident to the reflecting surface, and therefore the light reflected by the reflecting surface is emitted to the direction control element.

13. The head-up display apparatus according to claim 1, further comprising:

an anti-glare element;

14. A vehicle, characterized by comprising:

the head-up display device according to any one of claims 1-13; and

an external imaging component.

15. The vehicle of claim 14,

the external imaging component comprises a windshield, the windshield comprises a first glass substrate and a second glass substrate which are arranged oppositely to the box, and a wedge-shaped film is arranged between the first glass substrate and the second glass substrate.

16. The vehicle of claim 14,

a selective reflection film is arranged on one side of the external imaging component, which is close to the light outlet;

17. The vehicle of claim 14,

the external imaging component is provided with a phase delay element on one side close to the light outlet, imaging light emitted through the light outlet is S polarized light, and the phase delay element is used for converting the S polarized light emitted through the light outlet into P polarized light or circularly polarized light.

18. The vehicle of claim 14,

and a P-polarized reflecting film is arranged on one side of the external imaging part close to the light outlet, and imaging light emitted through the light outlet is P-polarized light.

19. The vehicle of claim 14, further comprising:

a filter sunglass;

wherein the filter ink mirror is used for filtering the S polarized light.

20. The vehicle of claim 19,

the imaging light emitted through the light outlet is circularly polarized light or elliptically polarized light.

21. The vehicle of claim 19,

the imaging light emitted through the light outlet is P polarized light.