CN218524969U - Image display device and vehicle - Google Patents

Abstract

The embodiment of the application discloses image display device, vehicle can be used to alleviate visual fatigue and vertigo that the viewer produced in continuously watching 3D virtual image under scenes such as table display, HUD. The image display device provided by the embodiment of the application comprises: and the zooming image source assembly is used for forming an initial image, imaging the initial image into a first virtual image and adjusting the distance between the first virtual image and the zooming image source assembly. And the optical path folding component is used for reflecting the light from the zooming image source component to the imaging component. The imaging assembly is used for amplifying the adjusted first virtual image into a second virtual image, and the distance between the second virtual image and human eyes is changed along with the change of the distance between the first virtual image and the zoom image source assembly.

Description

Image display device and vehicle

Technical Field

The present application relates to the field of image processing, and in particular, to an image display device and a vehicle.

Background

In the three-dimensional (3D) display technology, generally, a parallax technology is used to display images of the same object taken at different angles to the left and right eyes of a person, and the images are imaged on a spatial point by using the convergence effect of both eyes to present a stereoscopic feeling. However, in the related display technology of Augmented Reality (AR) or Virtual Reality (VR), a single-focus optical design scheme is often adopted, and an image designed by the scheme is fixed for the image distance of human eyes, so that a viewer does not need to perform refraction adjustment when viewing the image. At this time, convergence conflict occurs, eyes are constantly balanced and adjusted, and visual fatigue symptoms such as blurred vision, dry eyes, dizziness, photophobia, nausea and vomiting can occur.

In order to solve the problems, the 3D display device can provide two images with different depths of field in the same scene and form two virtual images corresponding to the two images. One eyeball of the human receives the two images by adjusting the focal distance, thereby generating a stereoscopic image, i.e., a 3D image, in the human brain. In such a display device, the number of virtual image plane adjustments that can be achieved is limited, resulting in a mismatch between the virtual image position and the viewpoint position of a person, and severe visual fatigue and dizziness, etc., that occur when a viewer views a 3D virtual image.

SUMMERY OF THE UTILITY MODEL

The application provides an image display device, vehicle, in image display device, through the focus of adjusting the image source subassembly of zooming, adjust the distance between first virtual image and the image source subassembly of zooming and the distance between second virtual image and the people's eye, realize that the distance between second virtual image to the people's eye is dynamic continuously adjustable, alleviate the viewer and continuously watch the visual fatigue and dizzy of 3D virtual image in-process production.

A first aspect of embodiments of the present application provides an image display apparatus, which includes a variable focus image source assembly, an optical path folding assembly, and an imaging assembly. The variable focus image source assembly is capable of forming a 2D initial image and imaging the initial image as a first virtual 3D image. The variable focus image source assembly is further capable of varying the focal length to adjust a distance between the first virtual image and the variable focus image source assembly. The light path folding assembly reflects light from the zooming image source assembly to the imaging assembly, the imaging assembly amplifies the adjusted first virtual image into a second virtual image, the 3D image seen by human eyes is the second virtual image, and the distance between the second virtual image and the human eyes changes along with the change of the distance between the first virtual image and the zooming image source assembly. The first virtual image is an image with depth of field, namely a 3D image; accordingly, the second virtual image is also a 3D image.

According to the technical scheme, the method has the following advantages: in the image display device, the distance between the first virtual image and the zooming image source assembly and the distance between the second virtual image and the human eyes are adjusted by adjusting the focal length of the zooming image source assembly, so that the dynamic and continuous adjustment of the distance between the second virtual image and the human eyes is realized, and the visual fatigue and dizziness generated in the process of continuously watching the 3D virtual image by a viewer are relieved. In addition, the light path folding assembly is arranged, and the light folding light path from the zooming image source assembly is reflected, so that the size of the image display device is reduced, and the practicability of the image display device is improved.

In one possible implementation of the first aspect, the image display device further comprises an eye tracking component for capturing eye movements to determine a viewpoint position of the eye. And the zooming image source assembly is used for adjusting a first distance between the first virtual image and the image source according to the viewpoint position.

In the embodiment of the application, the eyeball tracking assembly is arranged in the image display device, so that the viewpoint position of human eyes can be confirmed. The focal length is changed in real time according to the viewpoint position, the distance between the second virtual image and human eyes is adjusted, the second virtual image is matched with the viewpoint position, and visual fatigue and dizziness generated when a viewer continuously watches the 3D virtual image are further relieved.

In one possible implementation of the first aspect, the zoom image source component adjusts a distance between the first virtual image and the image source according to the viewpoint position and the history image. The historical image includes the first virtual image or the second virtual image before adjustment. Specifically, zoom the image source subassembly at first with initial image formation of image for first virtual image, zoom after the light path that the image source subassembly sent passes through light path folding assembly and the formation of image subassembly, form images for initial second virtual image (also the second virtual image before adjusting), if the viewpoint position this moment is not in the predetermined position within range of initial second virtual image, because vergence conflict, the viewer produces physiological phenomena such as visual fatigue such as dizzy when continuously watching the virtual image at this position easily. Therefore, the focal length of the zoom image source assembly is changed to adjust the distance between the first virtual image and the zoom image source assembly, and the distance between the second virtual image and the human eyes is also adjusted, so that the viewpoint position of the human eyes falls within the preset position range of the finally-imaged second virtual image. The preset position range of the second virtual image comprises an actual imaging range and an error range of the second virtual image.

The zoom image source assembly of the image display device particularly adjusts a first distance between the first virtual image and the zoom image source assembly according to the viewpoint position and the historical image, so that the viewpoint position falls in a preset position range of the second virtual image corresponding to the adjusted first virtual image, the adjustment is more accurate, and visual fatigue and dizziness generated in the process of continuously watching the 3D virtual image by a viewer are further relieved.

In one possible implementation form of the first aspect, the zoom image source assembly includes an image source module and a zoom module. The image source module is used for forming an initial image; and the zooming module is used for imaging the initial image into a first virtual image and adjusting the distance between the first virtual image and the zooming image source assembly.

In one possible implementation manner of the first aspect, the zoom image source assembly includes at least one image source module and M zoom modules, where M is a positive integer. Each of the at least one image source module corresponds to at least one of the M zoom modules. At least one image source module for forming an initial image; and the M zooming modules are used for imaging the initial image into a first virtual image and adjusting the distance between the first virtual image and the zooming image source assembly.

It should be noted that in the zoom image source assembly, the number of zoom modules corresponding to different image source modules may be the same or different, and is not limited herein. Optionally, assuming that the number of the image source modules and the number of the zoom modules are the same, the image source modules and the zoom modules correspond to each other one to one. Optionally, if the number of the image source modules is less than the number of the zoom modules, the corresponding relationship between the image source modules and the zoom modules may be that some image source modules correspond to one zoom module, and some image source modules correspond to multiple zoom modules; each image source module may also correspond to a plurality of zoom modules, which is not limited herein.

In one possible implementation manner of the first aspect, there are multiple possible position relationships between the image source module and the zoom module. Optionally, the image source module and the at least one zoom module corresponding to the image source module may be independent (specifically, the at least one zoom module is located on the display side of the image source module); optionally, at least one zoom module corresponding to the image source module may be integrated in the image source module; optionally, a portion of at least one zoom module corresponding to the image source module may be integrated in the image source module, and another portion is located on the display side of the image source module, which is not limited herein. In the zoom image source assembly, the positional relationships between different image source modules and corresponding zoom modules may be the same or different, and are not limited herein.

In the image display device, the position relation between the image source module in the zooming image source assembly and the zooming assembly has multiple possibilities, the structure of the image display device is enriched, the image display device can be flexibly suitable for different requirements, and the practicability of the technical scheme of the application is also improved.

In a possible implementation manner of the first aspect, the image source module may be any one of a Liquid Crystal Display (LCD), an Organic Light Emitting Display (OLED), a micro light emitting diode (micro LED), a Liquid Crystal On Silicon (LCOS), an LCD, and a Digital Light Processing (DLP), and is not limited herein.

In the embodiment of the application, the types of the image source modules are rich, so that the method can flexibly adapt to different scenes, and the flexibility of the technical scheme of the application is further improved.

In one possible implementation manner of the first aspect, it is assumed that the focal length of the variable focal length image source assembly is a first focal length f1, and the focal length of the image display apparatus is a second focal length f2. Then, in the case of 0 < f1/f2 < 0.5 or 1.9 < | f1/f2| < 2.2, the display effect of the second virtual image is clear.

In a possible implementation manner of the first aspect, the type of the device used by the optical path folding assembly may be a half mirror, a mirror, or another device capable of reflecting light emitted by the image source, such as a reflective polarizer, which is not limited herein.

In one possible implementation of the first aspect, there are also many possible types of devices used by the imaging assembly, including but not limited to at least one of a curved mirror, a lens, and a lens group. The curved mirror includes, but is not limited to, a free-form surface mirror, a spherical mirror, and other devices capable of reflecting light, and is not limited herein.

In one possible implementation of the first aspect, there are multiple possibilities of types of zoom modules, including but not limited to at least one of liquid lenses, force actuated zoom lenses, electro-deformation actuated zoom lenses, electro-magnetically actuated zoom lenses, piezo-actuation based zoom lenses, electro-active polymer based zoom lenses.

In the image display device, the device types of the optical path folding component, the imaging component and the zooming module are all possible and can be combined randomly, so that the practicability and flexibility of the technical scheme are further improved.

In a possible implementation manner of the first aspect, the image display device may further include a driving component, and the driving component is configured to change a position of the at least one variable focus image source component, which enriches flexibility of the technical solution of the present application.

In a possible implementation manner of the first aspect, the optical path folding component may also be a movable component, that is, the optical path folding component may also be connected to the driving component, so that the optical path folding component can reflect all the light from the variable image source component.

In one possible implementation of the first aspect, the eye tracking assembly includes, but is not limited to, an infrared camera.

In one possible implementation manner of the first aspect, the initial image may be formed in a time-division manner or a space-division manner. If formed by space division, the image display apparatus includes at least two image source modules.

A second aspect of the embodiments of the present application provides a vehicle, where the vehicle includes the image display device shown in the first aspect and any one implementation manner of the first aspect, and the image display device is installed on the vehicle.

In one possible implementation of the second aspect, the vehicle further comprises a windshield. An image display device for projecting imaging light toward a windshield; a windshield for reflecting the imaging light into a human eye.

In the embodiment of the application, the image display device can be used independently and can also be used in vehicles, and the practicability of the technical scheme is improved.

Drawings

FIG. 1a is a schematic view of a vergence;

FIG. 1b is a schematic view of refractive adjustment;

fig. 2 is a schematic structural diagram of an image display device according to an embodiment of the present application;

fig. 3 is another schematic structural diagram of an image display device according to an embodiment of the present application;

fig. 4 is another schematic structural diagram of an image display device according to an embodiment of the present application;

fig. 5 is a schematic diagram of a preset position range of a second virtual image according to an embodiment of the present application;

fig. 6 is another schematic structural diagram of an image display device according to an embodiment of the present application;

fig. 7 is another schematic structural diagram of an image display device according to an embodiment of the present application;

fig. 8 is another schematic structural diagram of an image display device according to an embodiment of the present application;

fig. 9 is another schematic structural diagram of an image display device according to an embodiment of the present application;

fig. 10 is a schematic diagram of an application scenario provided in an embodiment of the present application.

Detailed Description

The application provides an image display device, vehicle, in image display device, through the focus of adjusting the image source subassembly of zooming, adjust the first virtual image and zoom the distance between the image source subassembly and the distance between second virtual image and the people's eye, realize that the distance between second virtual image to the people's eye is dynamic continuously adjustable, has alleviated the visual fatigue and the dizzy of viewer continuously watching 3D virtual image in-process production.

Embodiments of the present application are described below with reference to the accompanying drawings. As can be known to those skilled in the art, with the development of technology and the emergence of new scenes, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

The terms "first," "second," and the like in the description and claims of this application and in the foregoing drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely descriptive of the various embodiments of the application and how objects of the same nature can be distinguished. 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 elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

First, proper nouns and related concepts that may be referred to in the present application will be described.

1. And (5) convergence of vision.

When the human eyes see a certain point, the two eyes can rotate to enable the view points to fall on the corresponding positions on the retinas. As shown in fig. 1a, when looking at a near blank, both eyes typically look inward; when looking at distant scenes, the visual axis diverges a little, which causes a vergence.

2. And (4) adjusting the refraction.

When a person looks at a real object, in addition to the vergence adjustment, the person needs to perform vergence adjustment on light at different distances. The phenomenon of the change of direction of a light ray passing from one medium into another medium of different refractive index is known in the eye optics as "refraction". As shown in fig. 1b, the light emitted or reflected by the near or far object passes through the dioptric system of the eye and falls on the retina, so that a clear image is presented. In this process, the process of focusing the lens on the object is also referred to as focus adjustment.

3. A virtual image.

A virtual image is an image that can be seen by the human eye but cannot be presented on a screen. When a person looks at a virtual image, light enters the eyes of the person, but the light is not generated by the virtual image, but is reflected or refracted by the optical device. The virtual image may be formed for a variety of reasons, either by reflection or refraction.

Next, referring to fig. 2, fig. 2 is a schematic structural diagram of an image display device according to an embodiment of the present disclosure.

As shown in fig. 2, the image display apparatus 1000 includes a variable focal image source assembly 100, an optical path folding assembly 301, and an imaging assembly 501. The arrows shown in fig. 2 indicate the propagation paths, i.e., the optical paths, of the light rays emitted by the variable focal length image source assembly 100.

The variable focus image source assembly 100 is capable of forming a 2D initial image and imaging the initial image as a first virtual 3D image. The initial image may be formed by time division or space division.

The variable focus image source assembly 100 is also capable of varying the focal length to adjust the distance between the first virtual image and the variable focus image source assembly 100. The optical path folding assembly 301 reflects the light from the zoom image source assembly 100 onto the imaging assembly 501, the imaging assembly 501 enlarges the adjusted first virtual image into a second virtual image, and a 3D image seen by human eyes is the second virtual image. The distance between the second virtual image and the human eye changes as the distance between the first virtual image and the variable focus image source assembly 100 changes. The first virtual image is an image with depth of field, namely a 3D image; accordingly, the second virtual image is also a 3D image.

In the embodiment of the application, through the focus of adjusting the image source subassembly of zooming, adjust the distance between first virtual image and the image source subassembly of zooming and the distance between second virtual image and the people's eye, realize that the distance between second virtual image to the people's eye is dynamic continuously adjustable, alleviated the visual fatigue and dizzy that the viewer is continuously watching 3D virtual image in-process production.

In some optional embodiments, the image display device may further include an eye tracking component, which will be described below. Referring to fig. 3, fig. 3 is a schematic structural diagram of an image display device according to an embodiment of the present disclosure.

As shown in fig. 3, the image display apparatus 1000 includes an eye tracking assembly 401 in addition to the variable focal image source assembly 100, the optical path folding assembly 301, and the imaging assembly 501. Similar to fig. 2, the arrows shown in fig. 3 indicate the propagation paths, i.e., the optical paths, of the light rays emitted by the variable focal length image source assembly 100. Light emitted by the variable focal length image source assembly 100 is reflected to the imaging unit 501 through the optical path folding assembly 301, and the imaging unit 501 reflects the light to human eyes, so that the human eyes see a second virtual image. The eye tracking assembly 401 captures the movement of the human eye in real time to determine the viewpoint position of the human eye, such that the zoom image source assembly 100 changes the focal length to change the distance between the first virtual image and the image source, and further change the distance between the second virtual image and the human eye. Optionally, the eye tracking assembly 401 includes, but is not limited to, an infrared camera.

In the embodiment of the application, the eyeball tracking component is arranged in the image display device, so that the viewpoint position of human eyes can be confirmed. The focal length is changed in real time according to the viewpoint position, and the distance between the second virtual image and human eyes is adjusted, so that the second virtual image is matched with the viewpoint position, and visual fatigue and dizziness generated in the process of continuously watching the 3D virtual image by a viewer are further relieved.

In some optional embodiments, the zoom image source assembly is specifically configured to adjust a distance between the first virtual image and the zoom image source assembly according to the viewpoint position and the history image. Wherein the historical image comprises the first virtual image or the second virtual image before adjustment (i.e. the initial second virtual image).

In some optional implementations, in one possible implementation form of the first aspect, the zoom image source assembly includes an image source module and a zoom module. The image source module is used for forming an initial image; and the zooming module is used for imaging the initial image into a first virtual image and adjusting the distance between the first virtual image and the zooming image source assembly.

In some alternative embodiments, a zoom image source assembly in an image display device includes at least one image source module and M zoom modules, where M is a positive integer. Each of the at least one image source module corresponds to at least one of the M zoom modules. At least one image source module for forming the initial image; and the M zooming modules are used for imaging the initial image into a first virtual image and adjusting the distance between the first virtual image and the zooming image source assembly.

It should be noted that in the zoom image source assembly, the number of zoom modules corresponding to different image source modules may be the same or different, and is not limited herein. Optionally, assuming that the number of the image source modules and the number of the zoom modules are the same, the image source modules and the zoom modules correspond to each other one to one. Optionally, if the number of the image source modules is less than the number of the zoom modules, the corresponding relationship between the image source modules and the zoom modules may be that some image source modules correspond to one zoom module, and some image source modules correspond to multiple zoom modules; each image source module may also correspond to a plurality of zoom modules, which is not limited herein.

Next, taking an example that the zoom image source assembly includes one image source module and one zoom module, an adjustment process of the image display device provided in the embodiment of the present application will be described. Referring to fig. 4, fig. 4 is a schematic structural diagram of an image display device according to an embodiment of the present disclosure.

As shown in fig. 4, the image display apparatus 1000 includes a zoom image source assembly 100, an optical path folding assembly 301, an eye tracking assembly 401, and an imaging assembly 501; the zoom image source assembly 100 includes an image source module 101 and a zoom module 201. Arrows shown in fig. 4 indicate the propagation path, i.e., the optical path, of light rays emitted from the image source module 101.

The image source module 101 is capable of forming an initial image in 2D, which is imaged by the zoom module 201 as a first virtual image in 3D. The initial image may be formed in a time-division or space-division manner. Specifically, the image source module 101 includes a plurality of pixel units, each including a plurality of sub-pixels. The zoom module 201 is disposed on the display side of the image source module 101. The zoom module 201 includes a plurality of imaging units, each imaging unit corresponds to a position of at least one sub-pixel, and a 2D image displayed by the sub-pixel is imaged by the corresponding imaging unit to form a 3D virtual image.

As shown in fig. 4, light emitted by the image source module 101 passes through the zoom module 201 to be imaged into a first virtual image, and then passes through the optical path folding assembly 301 and the imaging assembly 501 to be reflected into human eyes, where the corresponding virtual image is located at the position of the initial second virtual image. If the eye tracking assembly 401 determines that the eye point position of the eye is not within the predetermined position range of the initial second virtual image, the physiological phenomena such as visual fatigue, such as vertigo, are easily caused due to convergence conflict.

Therefore, the zoom module 201 can adjust the focal length of itself, change the distance between the first virtual image and the image source module 101, and also adjust the distance between the second virtual image and the human eyes, so that the viewpoint position falls within the preset position range of the final imaging second virtual image. Wherein the second virtual image corresponds to the adjusted first virtual image.

It is noted that the adjustment process shown in fig. 4 may take place in a very short time, and the user may not perceive the change in the second virtual image, i.e. the human eye always sees a clear 3D virtual image. The concept of the history image is for the image display apparatus, and in a very short time (possibly within the time of one frame of a picture), the zoom module 201 adjusts the focal length so that the viewpoint position of the human eye falls within the preset position range of the finally imaged second virtual image.

As shown in fig. 5, the preset positional range of the second virtual image includes the actual imaging range and the error range of the second virtual image. When the viewpoint position falls within the error range, the viewer does not have serious visual fatigue or dizziness and other problems, the error range is set, the focal length can be prevented from being adjusted frequently, and the stability of the picture can be kept.

It is to be noted that since the second virtual image is a 3D image, the actual imaging range and the error range of the second virtual image are also three-dimensional ranges, and fig. 5 is merely exemplarily illustrated in a two-dimensional screen.

It should be noted that fig. 4 illustrates the zoom module 201 as a convex lens, and in practical applications, a concave lens may also be used as the zoom module 201, and the details are not limited herein. According to the imaging rule of the virtual image, when the virtual image is formed by the lens, if the virtual image is a convex lens, the virtual image and the object are both sides of the convex lens (so the position of the first virtual image and the image source module 101 in fig. 4 are both sides of the zoom module 201, respectively); in the case of a concave lens, the virtual image is on the same side of the concave lens as the object.

In the embodiment of the application, the zoom assembly of the image display device specifically adjusts the distance between the first virtual image and the image source according to the viewpoint position and the historical image, so that the viewpoint position falls in the preset position range of the second virtual image corresponding to the adjusted first virtual image, the adjustment is more accurate, and the visual fatigue and dizziness generated by the viewer in the process of continuously watching the 3D virtual image are further relieved.

It should be noted that, in the embodiment shown in fig. 4, the image display device provided in the embodiment of the present application is illustrated by taking an example in which the image display device includes one image source module and one zoom module. In practical applications, the zoom image source assembly may further include a greater number of image source modules and zoom modules, and a position relationship between the image source modules and the zoom modules is also possible, which is further described below with reference to the schematic diagram.

Referring to fig. 4, 6 to 8, fig. 4, 6 to 8 are schematic structural views of an image display device according to an embodiment of the present disclosure.

In some optional embodiments, the image source module and the at least one zoom module corresponding to the image source module may be independent (specifically, the at least one zoom module is located on the display side of the image source module).

Illustratively, as shown in fig. 4, the image source module 101 and the zoom module 201 are independent. It should be noted that fig. 4 is merely an example of an image source module that includes an external corresponding zoom module for zooming the image source assembly. In practical applications, the zoom image source assembly may further include a greater number of image source modules, and a greater number of zoom modules may be provided outside each image source module, which is not limited herein.

In some alternative embodiments, at least one zoom module corresponding to the image source module may be integrated within the image source module.

Illustratively, as shown in fig. 6, the zoom module 201 is integrated in the image source module 101. It should be noted that fig. 6 is merely an example of a zoom image source assembly including an image source module with a zoom module integrated therein. In practical applications, the zoom image source assembly may further include a greater number of image source modules, in which the zoom module is integrated, and each image source module may further be integrated with a greater number of zoom modules, which is not limited herein.

In some optional embodiments, the at least one zoom module corresponding to the image source module may be partially integrated in the image source module, and the other part is located on the display side of the image source module. Illustratively, as shown in fig. 7, the zoom module 201 is integrated in the image source module 101, and the zoom module 202 is external to the image source module 101. It should be noted that fig. 7 is merely an example of an image source module that includes corresponding zoom modules for zooming the image source assembly. In practical applications, the zoom image source assembly may further include a greater number of image source modules having zoom modules inside and outside, and the image source modules may further have a greater number of zoom modules inside and/or outside, which is not limited herein.

It should be noted that in the zoom image source assembly, the positional relationship between different image source modules and corresponding zoom modules may be the same or different, and is not limited herein.

Illustratively, as shown in fig. 8, the image source module 101 corresponds to a zoom module 201, and the zoom module 201 is integrated inside the image source module 101; the image source module 102 corresponds to a zoom module 202 and a zoom module 203, the zoom module 202 is integrated inside the image source module 102, and the zoom module 203 is located outside the image source module 102.

It should be noted that fig. 8 is only an example of the zoom image source assembly including an image source module having corresponding zoom modules inside and outside, and an image source module having a zoom module integrated therein. In practical applications, the zoom image source assembly may further include a greater number of image source modules and/or zoom modules, which is not limited herein.

Among the image display device, the quantity of image source module and the module of zooming has multiple possibility, and the corresponding relation and the positional relation between image source module and the module of zooming also have multiple possibility, have richened image display device's structure for image display device can be applicable to different demands in a flexible way, has also promoted this application technical scheme's practicality.

In some optional embodiments, the image source module may serve as a display screen, and employ any one of a Liquid Crystal Display (LCD), an Organic Light Emitting Display (OLED), and a micro light emitting diode (micro LED), which is not limited herein. In this case, the image source module may also be referred to as a direct imaging image source.

In some optional embodiments, the image source module may be used as a projection imaging image source, and may employ any one of an LCD, a Liquid Crystal On Silicon (LCOS), and a Digital Light Processing (DLP), which is not limited herein.

In the embodiment of the application, the image source modules are rich in types, can flexibly adapt to different scenes, and further improves the flexibility of the technical scheme of the application.

Assume that the focal length of the zoom component is the first focal length f1 and the focal length of the image display device is the second focal length f2. Then, in the case of 0 < f1/f2 < 0.5 or 1.9 < | f1/f2| < 2.2, the display effect of the second virtual image is clear.

In some optional embodiments, if at least one of the image source modules adopts any one of an LCD, an OLED, and a micro LED, that is, a direct imaging image source, the display effect of the second virtual image is clear if the relationship between the first focal length f1 and the second focal length f2 satisfies 0 < f1/f2 < 0.5.

Illustratively, the image display device provided by the embodiment of the application can realize that the second virtual image distance is continuously adjustable within 3-4 m under the condition that the focal length of the image display device is 200-300 mm. Specifically, taking the structure shown in fig. 6 as an example, assuming that the image source module 101 in the image display device 1000 shown in fig. 6 is a direct imaging image source, and the focal length of the zoom module 201 is 700mm and the focal length of the image display device 1000 is 248mm, the distance between the second virtual image and the viewer is 3m. When the focal length of the zoom module 201 is 891mm and the focal length of the image display device 1000 is 223mm, the distance between the second virtual image and the viewer is 4m. By realizing that the distance between the second virtual image and the viewer is continuously adjustable within 3-4 m, convergence conflict (VAC) is less than or equal to +/-0.04D, and the 3D dizziness feeling of the traditional display screen is relieved. Where D denotes diopter, which is the unit of the refractive power, and the stronger the refractive power, the shorter the focal length.

In some optional embodiments, if at least one of the image source modules adopts any one of LCD, LCOS and DLP, that is, the projection imaging image source, the display effect of the second virtual image is clear if the relationship between the first focal length f1 and the second focal length f2 satisfies 1.9 < | f1/f2| < 2.2.

Illustratively, the image display device provided by the embodiment of the application can realize that the second virtual image distance is continuously adjustable within 1-5 m under the condition that the focal length of the image display device is-200-100 mm. Specifically, taking the structure shown in fig. 6 as an example, assuming that the image source module 101 in the image display device 1000 shown in fig. 6 is a projection imaging image source, when the focal length of the zoom module 201 is 78mm and the focal length of the image display device 1000 is-164.9 mm, the distance between the second virtual image and the viewer is 1m. When the focal length of the zoom module 201 is 80mm and the focal length of the image display apparatus 1000 is-168.7 mm, the distance between the second virtual image and the viewer is 5m. By realizing that the distance between the second virtual image and the viewer is continuously adjustable within 1-5 m, convergence conflict VAC is less than or equal to +/-0.4D, and the 3D dizziness feeling of the traditional display screen is relieved.

In the image display apparatus provided in the embodiment of the present application, there are many possible types of devices used in each component, and the following description is made separately.

In some alternative embodiments, the type of device used by the optical path folding assembly may be a half-mirror, a mirror, or other devices capable of reflecting light emitted from the image source, such as a reflective polarizer, which is not limited herein.

In some alternative embodiments, in the schematic diagrams of the image display apparatus (i.e., the embodiments shown in fig. 2 to 4 and fig. 6 to 8), the optical path folding component 301 may be a half-reflecting and half-transmitting mirror. Optionally, the upper half of the optical path folding component 301 is used for reflecting the light from the image source, and the lower half is used for transmitting the light reflected by the imaging component. Optionally, the optical path folding component 301 may also reflect light from the image source and transmit light from the imaging component according to a certain ratio, and the ratio of reflection to transmission may be half of each other or not, and is not limited herein.

In practical applications, the volume of the optical path folding component can be smaller, which will be described below. Referring to fig. 9, fig. 9 is a schematic structural diagram of an image display device according to an embodiment of the present application.

In the case where the position of the image source module 101 is fixed, the range of light that can be emitted by the image source module 101 is also fixed. The range of propagation of the light beam is indicated by the shaded portion shown in fig. 9. In this case, the optical path folding member 301 may reflect the light from the image source module 101, and the volume of the optical path folding member can be reduced compared to the previous schematic diagrams.

In some alternative embodiments, the imaging assembly includes an assembly capable of reflecting light reflected by the optical path folding assembly to the human eye and magnifying the first virtual image into the second virtual image. There are many possible types of devices used in the imaging assembly, including but not limited to at least one of curved mirrors, lenses, and lens groups, and are not limited thereto. The curved mirror includes, but is not limited to, a free-form surface mirror, a spherical mirror, and other devices capable of reflecting light, and is not limited herein.

In some alternative embodiments, the zoom module comprises a module capable of transmitting light from the image source and imaging an initial image of the image source as a first virtual image. The type of the zoom module may be various types, including but not limited to at least one of a liquid lens, a force-induced deformation driven zoom lens, an electro-deformation driven zoom lens, an electromagnetic driven zoom lens, a zoom lens based on a piezoelectric drive, and a zoom lens based on an electro-active polymer, and is not limited herein.

The liquid lens includes, but is not limited to, a liquid crystal lens, a liquid-filled zoom lens, a fluid zoom lens, and the like, and is not limited herein.

In addition, the types of the zooming modules corresponding to the same image source module can be the same or different; different image source modules may correspond to the same or different types of zoom modules, and are not limited herein.

In the image display device, the device types of the optical path folding component, the imaging component and the zooming module are all possible and can be combined randomly, so that the practicability and flexibility of the technical scheme are further improved.

In some optional embodiments, the image display apparatus may further comprise a driving assembly for changing a position of at least one of the variable image source assemblies, and in particular, changing a position of an image source module in the variable image source assembly. For example, assuming that the positions of the zoom module, the optical path folding module and the imaging module in the image display device are all fixed, the second virtual image is not a complete image based on the current position of the image source module. The driving assembly changes the position of the image source module so that the initial image of the image source module can be imaged by the zooming assembly to form a complete first virtual image, and the light from the image source module can be reflected by the optical path folding assembly to the imaging assembly to form a complete second virtual image, thereby ensuring the integrity of the imaging result. Simultaneously, the flexibility of the technical scheme of the application can be enriched.

In some alternative embodiments, the optical path folding component may also be a movable component, that is, the optical path folding component may also be connected to the driving component, so that the optical path folding component can reflect all the light from the image source module. The driving component connected to the optical path folding component and the driving component connected to the image source module may be the same driving component or different driving components, and are not limited herein.

It should be noted that the image display device provided in the embodiment of the present application may be a desktop display device or a Head Up Display (HUD) device, and is not limited herein.

In an embodiment of the present application, there is also provided a vehicle including the image display device described in any one or more of the above embodiments, the image display device being mounted on the vehicle as a HUD device. It should be noted that in the image display apparatus mounted on the vehicle, both the optical path folding component and the imaging component are reflectors.

In some alternative embodiments, a windshield is included on the vehicle, which may be understood as an imaging component in the image display device. An image display device for projecting imaging light toward a windshield; a windshield for reflecting the imaging light into a human eye.

Referring to fig. 10, fig. 10 is a schematic view of an application scenario provided in the embodiment of the present application.

As shown in fig. 10, in a HUD scene, the reflecting device is a windshield. The zooming image source assembly outputs imaging light, and the imaging light passes through optical devices such as the light path folding assembly and is projected onto the windshield. The windshield reflects the imaging light to the human eye, presenting an image on the human eye.

It is noted that the purpose of the windshield is to reflect the imaging light into the human eye, and on a vehicle, the windshield may be a windshield. In other scenarios, reflectors made of other materials may also be used, and are not limited herein. In addition, in practical applications, the image generating apparatus may further include a greater or lesser number of optical path folding components, and is not limited herein.

It should be noted that the HUD processing may be applied to vehicles such as vehicles and airplanes, and may also be applied to scenes such as a central control room, a building landscape, and advertisement placement, and the specific details are not limited herein.

In some optional embodiments, the image display device provided in the embodiments of the present application may be applied to an interactive system when the image display device is used as a desktop display device. In practical application, human eyes can see a 3D virtual image through the image display device, and the method can be applied to different scenes: for example, in scenes such as offices, education, medical care, entertainment, advertisement placement, architectural decoration, event relay, exhibition of artworks, collections, and the like, and exhibition of performances such as dramas, operas, concerts, and the like.

Illustratively, in a video playing scene, a naked-eye 3D effect is realized, which is similar to the effect of watching a 3D movie after traditional 3D glasses are worn. The difference is that the interactive system provided by the embodiment of the application does not need a viewer to wear 3D glasses, and the viewer sees a 3D virtual image.

For example, in a VR or AR scene, the interactive system provided in the embodiment of the present application does not require a user to wear a 3D device, and the image display apparatus provided in the embodiment of the present application can feel the effect of virtual reality or augmented reality with naked eyes.

In some optional embodiments, the interactive system may further include a control device, where the control device is capable of receiving an instruction from a user to interact with the image display device to change the content of the screen displayed by the image display device. Likewise, an interactive system comprising a control device and an image display device may also be applied in different scenarios.

For example, in a game scene of man-machine interaction, a game player operates a control device (such as a game handle) to control a 3D game picture seen by the naked eye of the player, including but not limited to modifying picture content, triggering game tasks, talking to virtual tasks in a game and the like, so that the game experience can be enhanced.

It is obvious to those skilled in the art that the disclosed apparatus can be implemented in other ways in several embodiments provided in the present application. For example, the apparatus embodiments described above are merely illustrative, e.g., multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In other instances, indirect coupling or communicative coupling of devices or elements as shown or discussed may be electrical, mechanical or otherwise.

Claims (13)

1. An image display apparatus, comprising:

the system comprises a variable-focus image source assembly, a first image acquisition assembly and a second image acquisition assembly, wherein the variable-focus image source assembly is used for forming an initial image, imaging the initial image into a first virtual image and adjusting the distance between the first virtual image and the variable-focus image source assembly;

the optical path folding component is used for reflecting the light from the zoom image source component to the imaging component;

the imaging assembly is used for amplifying the first virtual image into a second virtual image, and the distance between the second virtual image and human eyes is changed along with the change of the distance between the first virtual image and the zoom image source assembly.

2. The image display device according to claim 1, further comprising:

an eye tracking component for capturing eye movements to determine a viewpoint location of the eye;

the zoom image source assembly is specifically configured to adjust a distance between the first virtual image and the zoom image source assembly according to the viewpoint position.

3. The image display apparatus according to claim 2, wherein the variable focus image source assembly is specifically configured to adjust a distance between the first virtual image and the variable focus image source assembly according to the viewpoint position and a history image.

4. The image display device according to any one of claims 1 to 3, wherein the zoom image source assembly comprises an image source module and a zoom module;

the image source module is used for forming the initial image;

the zooming module is used for imaging the initial image into the first virtual image and adjusting the distance between the first virtual image and the zooming image source assembly.

5. The image display device according to any one of claims 1 to 3, wherein the variable focus image source assembly comprises at least one image source module and M variable focus modules, M being a positive integer;

each image source module of the at least one image source module corresponds to at least one zoom module of the M zoom modules;

the at least one image source module is used for forming the initial image;

the M zooming modules are used for imaging the initial image into the first virtual image and adjusting the distance between the first virtual image and the zooming image source assembly.

6. The image display device according to claim 4, wherein the image source module adopts any one of liquid crystal display, organic light emitting display, micro light emitting diode, liquid crystal on silicon, and digital light processing technology.

7. The image display device according to any one of claims 1 to 3, wherein the focal length of the variable focal length image source assembly is a first focal length f1, and the focal length of the image display device is a second focal length f2;

0 < f1/f2 < 0.5, or, 1.9 < | f1/f2| < 2.2.

8. The image display device according to any one of claims 1 to 3, wherein the optical path folding member comprises a half mirror, a mirror, or a reflective polarizer.

9. The image display device according to any one of claims 1 to 3, wherein the imaging component comprises at least one of a curved mirror, a lens, and a lens group.

10. The image display device of claim 4, wherein the zoom module comprises at least one of a liquid lens, a force actuated zoom lens, an electro-anamorphic actuated zoom lens, an electro-magnetically actuated zoom lens, a piezo-electric actuated based zoom lens, and an electro-active polymer based zoom lens.

11. An image display apparatus according to any one of claims 1 to 3, comprising a drive assembly for changing the position of at least one of the variable image source assemblies.

12. A vehicle characterized by comprising the image display device of any one of claims 1 to 6 and 10 mounted on the vehicle.

13. The vehicle of claim 12, further comprising a windshield;

the image display device is used for projecting imaging light to the windshield; the windshield is used for reflecting the imaging light to human eyes.

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