CN219039496U - Display device - Google Patents

Abstract

The present disclosure relates to the field of image display devices, and more particularly to a display device including: an image source for displaying a main image; a reference source for displaying a reference image; the imaging module is arranged opposite to the image source and the reference source respectively, and a main image displayed by the image source forms a first virtual image with a first image distance through the imaging module; forming a second virtual image with a second image distance in a preset area around the first virtual image by the imaging module according to the reference image displayed by the reference source, wherein the second image distance is smaller than the first image distance; and the observation interface is arranged opposite to the imaging module so as to observe the first virtual image and the second virtual image through the window. Compared with the prior art, the reference source is arranged at the front side of the image source, so that the image source has the second virtual image formed by the reference source through the imaging module when the first virtual image is formed by the imaging module, and the eye adjusting mechanism can be effectively prevented from being in a working state in a far vision state.

Description

Display device

Technical Field

The present disclosure relates to the field of image display devices, and more particularly to a display device.

Background

In the prior art, through the AR/VR technology and the Birdbath principle, the image of the display screen can be amplified and thrown far through a spectroscope and a concave mirror, a virtual image which is amplified and thrown far vertically and is watched by a viewer through an observation interface, and a surrounding non-imaging space is dark color. This creates a cinema-like effect, in which an image that is vertically enlarged and projected is formed in the middle, and a black area with no light is formed around the image, and when the eyes view the image, there is no reference object with a relative distance around the image, and the focus is easily lost. Therefore, when the near vision caused by too close object image is prevented by watching the object image, the adjusting mechanism for watching the near object image is generated under the condition that the outside is far vision due to no distance reference, so that the original purpose can not be achieved, and myopia is possibly generated or the myopia degree is possibly deepened.

Disclosure of Invention

The present disclosure has been made in view of the above-mentioned needs of the prior art, and an object of the present disclosure is to provide a display device to suppress elongation of an eye axis.

In order to solve the above problems, the technical solution provided by the present disclosure includes:

provided is a display device including: an image source for displaying a main image; a reference source for displaying a reference image; the imaging module is arranged opposite to the image source and the reference source respectively, and a main image displayed by the image source forms a first virtual image with a first image distance through the imaging module; forming a second virtual image with a second image distance in a preset area around the first virtual image by the imaging module according to the reference image displayed by the reference source, wherein the second image distance is smaller than the first image distance; and the observation interface is arranged opposite to the imaging module so as to observe the first virtual image and the second virtual image through the observation interface.

Through the arrangement, the second virtual image is arranged in front of the first virtual image of the finally formed watching object, and the second virtual image can play a role of distance reference, namely, the remote information of the first virtual image can be transmitted to eyes, so that an adjusting mechanism of the eyes is prevented from being started in a remote vision state, and further, the ciliary body is effectively prevented from being thickened and diopter increase due to the fact that the ciliary body is in a working state for a long time.

Preferably, the reference source is arranged in front of the image source, the reference source comprises a display screen, a first preset included angle is formed between the plane where the reference source is located and the plane where the main image is located, and the first preset included angle is within the range of 90-180 degrees.

This is arranged to ensure that the reference source is able to present a second virtual image in front of the first virtual image via the imaging module.

Preferably, the reference source comprises a lamp, the lamp being arranged in front of the image source.

The lamp is used as a reference source, so that the cost can be effectively saved, the luminous brightness is limited, the sealed shell is not greatly influenced, the control is easy, and the distance reference relative to the first virtual image can be realized.

Preferably, the reference source comprises a plurality of lamps disposed at least partially in front of the image source along a first direction, the first direction comprising a component having a front-to-back direction.

The arrangement of the discharge of the plurality of lamps can better and more accurately send out the remote information of the first virtual image to the eyes, so that the eyes are prevented from being mistakenly in a near vision state at the moment, and the ciliary body adjusting mechanism is prevented from being started.

Preferably, the plurality of lamps are partially disposed on a plane in which the main image lies.

So arranged as to be able to attract the viewer's attention, so as to be advantageous for the viewer to concentrate on the first virtual image formed by the main image.

Preferably, the plurality of lamps are uniformly arranged.

This is arranged to enable a uniform distance reference to the eyes so that the viewer has a good viewing effect.

Preferably, the imaging module includes a spectroscope, which is disposed opposite to the image source and the reference source, respectively; and the concave reflecting mirror is arranged opposite to the spectroscope.

By the arrangement, the light path for light propagation is increased, so that the first image distance of the first virtual image formed by the image source is ensured to be at a far position, and the damage to eyes under the condition of near vision is effectively prevented.

Preferably, a second preset included angle is formed between the plane where the main image is located and the spectroscope, and the second preset included angle comprises a 45-degree included angle.

The above arrangement ensures that the primary image presented on the image source propagates through the imaging module to form a first virtual image.

Preferably, the second virtual image has an in-eye luminance of less than 100nit.

The arrangement is such that the second virtual image presented is prevented from interfering with the first virtual image, affecting the viewing effect of the viewer, due to the excessive brightness of the reference source. So as to be advantageous for the viewer to intensively realize on the first virtual image formed by the main image.

Preferably, the first preset angle is 135 °.

This arrangement ensures proper imaging.

Compared with the prior art, the reference source is arranged at the front side of the image source, so that the image source has the second virtual image formed by the reference source through the imaging module when the first virtual image is formed by the imaging module, and the eye adjusting mechanism can be effectively prevented from being in a working state in a far vision state; in addition, the reference source is arranged around the image source, so that the attention of a viewer can be attracted to concentrate the sight, and the condition of near vision is better prevented.

Drawings

In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present description, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic view of a display device according to an embodiment of the present utility model;

FIG. 2 is a schematic view of an optical path of a display device according to another embodiment of the present utility model;

FIG. 3 is a front view of a display device according to an embodiment of the present utility model;

fig. 4 is a front view showing a structure of another display device according to an embodiment of the present utility model.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In describing the embodiments of the present disclosure, it should be noted that, unless explicitly stated and limited otherwise, the term "connected" should be construed broadly, for example, it may be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection via an intermediary. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

The terms "top," "bottom," "above … …," "below," and "on … …" are used throughout the description to refer to the relative positions of components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are versatile, irrespective of their orientation in space.

For the purpose of facilitating an understanding of the embodiments of the present application, reference will now be made to the following description of specific embodiments, taken in conjunction with the accompanying drawings, in which the embodiments are not intended to limit the embodiments of the present application.

The present embodiment provides a display device as shown in fig. 1 to 4.

The display device comprises an image source 1, a reference source 2, an imaging module and a viewing interface.

As shown in fig. 1 and 2, the image source 1 displays a main image. The image source 1 comprises a display screen for displaying a main image.

The imaging module is arranged opposite to the image source 1 and comprises a spectroscope 3 and a concave reflecting mirror 4.

The spectroscope 3 can reflect and transmit the received light, a part of the received light can change the propagation direction on the spectroscope 3 and return to the direction of the luminescent material, and a part of the received light is transmitted and emitted. The transmission is an exit phenomenon of incident light after it has been refracted through an object. The beam splitter 3 has a reflection value (R) and a transmission value (T), and the reflection and transmission of the beam splitter 3 is typically characterized by a ratio of the beams, i.e., the value of R: T. In the present disclosure, with the transmission of the beam splitter 3, a portion of the light will be filtered out to change the brightness of the final image, avoiding too high a brightness to create unnecessary irritation to the eye. A second preset included angle is formed between the spectroscope 3 and the plane where the main image is located, and the second preset included angle comprises 45 degrees. So arranged that the primary image is capable of forming a first virtual image 5 through the imaging module.

The concave mirror 4 belongs to one of the mirrors, which operates with the law of reflection to change the propagation direction of the light. The concave reflecting mirror 4 has a concave reflecting surface, and the light incident on the concave reflecting mirror 4 changes the propagation direction of the light through the concave reflecting surface. The concave mirror 4 may be a spherical mirror, an aspherical mirror, or a free-form surface mirror.

The beam splitter 3 and the concave reflecting mirror 4 are cooperatively arranged to extend the optical path, thereby realizing the projection of a main image, wherein the main image is a first virtual image 5 with a first image distance formed by the main image after passing through the imaging module.

The procedure of the first virtual image 5 formed by the main image is as follows: the light emitted by the image source 1 passes through the spectroscope 3 first, and a part of the light received by the spectroscope 3 passes through the spectroscope 3 in a transmission mode, so that the brightness of an image formed by the image source 1 is reduced, and the effect of influencing the watching effect due to the over-brightness of the final image is prevented; a part of the light rays is then emitted towards the concave mirror 4 by reflection to change the propagation direction. The light reflected by the beam splitter 3 diverges outwards, and the resulting image is formed by the intersection of the opposite extensions of the actual light. The first virtual image 5 falls within the double focus of the concave mirror 4 and when reflected again by the concave mirror 4, an enlarged, upright first virtual image 5 is formed. When the observer views the first virtual image 5 through the observation interface, the observed image is formed by the first virtual image 5 after being transmitted through the spectroscope 3.

The first virtual image 5 which is amplified and projected vertically is formed by the image source 1 under the action of the imaging module. When a viewer views the first virtual image 5 through the viewing interface, the display device has a black space except for the area where the first virtual image 5 is located, and no reference object with a relative distance is located in the device, so that the viewer can easily lose the implementation focus, that is, the adjustment mechanism that should be relaxed still may keep the working state when viewing only the first virtual image 5. Poor accommodation of the eye will create imaging lag of the eye, specifically, when the eye is used to look near, the imaging point is pulled onto the retina by contraction of the ciliary body as it moves posteriorly, to avoid imaging lag, which is achieved by the accommodation force of the eye. But if the accommodation power of the eye is poor, the image presented behind the retina cannot be pulled onto the retina. When the eye is in a state imaged behind the retina for a long period of time, an erroneous signal will be transmitted to the retina, and the retina will move backward in order to be able to see the image in the eye, thereby extending the axis of the eye, which may lead to myopia or exacerbate the degree of myopia. In the far vision state, the accommodation power should be in a relaxed state, but due to lack of distance reference, and the dark state of the surrounding space, the specific image distance of the first virtual image 5 is difficult to distinguish by eyes, when the specific image distance is not distinguished, the accommodation structure of the eyes is disordered, the accommodation power is enabled to work continuously, when the accommodation power is in a stage of the accommodation power for a long time, the ciliary muscle of the eyes is increased in tension and overdeveloped for a long time, so that the eye lens is thickened, the lens diopter is increased to cause accommodation myopia, if the lens is not timely relaxed, the ciliary muscle begins to harden and qualify after long-term tension, and the accommodation lens is in a locked state, and the eye lens becomes true myopia. That is, when the user views the first virtual image 5 having the first image distance to prevent near vision due to too close object image, the user does not have a distance reference, so that the user can not achieve the original purpose, but also can possibly cause myopia to occur or deepen the degree of myopia when the user views the near object image due to the fact that the user is looking far from the outside.

A reference source 2 is hereby introduced, which reference source 2 displays a reference image. As shown in fig. 1, the reference source 2 includes a lamp that is turned on to form a reference image. As shown in fig. 2, the reference source 2 further includes a display screen that displays a reference image that does not greatly affect the main image, such as a small-diameter spot or the like, but when the display screen displays, black that has no illumination brightness in the other areas than the area where the reference image is located is displayed to prevent interference with the viewing of the viewer.

Further, the reference source 2 is arranged in front of the image source 1. By this arrangement the image formed by the reference image after passing the imaging module is located before the main image so that the virtual image of the reference image can function as a distance reference.

Further, in order to ensure that the luminance of the reference image does not interfere with the luminance of the main image, the incoming luminance of the second virtual image formed by the reference source 2 is set to be less than 100nit. In this case, the virtual image of the reference image formed by the display device can function as a distance reference to transfer the distance information to the adjustment mechanism and the vision processing mechanism.

The reference image formed by the reference source 2 passes through an imaging module to form a second virtual image 6 with a second image distance, and the specific imaging process is as follows: the light propagation path of the light emitted by the reference source 2 passing through the far-image imaging module is the same as the light propagation path of the light emitted by the image source 1 passing through the far-image imaging module.

The reference source 2 mentioned as a reference may be a lamp or a display screen. The two cases will be described below, respectively: when the reference source 2 is a lamp, the lamp is disposed in front of the image source 1, and the difference between the reference source 2 and the image source 1 is made so that the first image distance of the finally formed first virtual image 5 is larger than the second image distance of the second virtual image 6, that is, the transmission of the far vision state to the eyes can be realized, the eyes do not need to adjust ciliary bodies, and the extension of eye axes is prevented.

Further, as shown in fig. 3, the reference source 2 comprises a plurality of lamps arranged at least partially in front of the image source 1 in a first direction comprising a component having a front-rear direction. The arrangement is such that the second virtual image 6 formed by the plurality of lamps, after a certain distance, creates a virtual image of one lamp, which are arranged in a certain direction so as to be able to indicate and alert the first image distance of the first virtual image 5 by referring to the virtual image of the source 2, thereby activating the response mechanism of the eye in the far vision state. Still further, the plurality of lamps are equally spaced apart so that the viewer has a good visual experience and is easily focused on the first virtual image 5, rather than on the virtual images of the unevenly distributed beads. Further, in still another implementation of the present embodiment, some of the plurality of lamps are disposed on a plane in which the main image is located, including on at least one of the upper and lower sides of the image source 1 and/or on at least one of the left and right sides of the image source 1. The arrangement is such that the viewer can be encouraged to concentrate his or her line of sight on the first virtual image 5 formed by the primary image, so that myopia can be prevented or slowed down better.

When the reference source 2 is a display screen, as shown in fig. 4, a plane in which the reference source 2 is located forms a first preset included angle with a plane in which the main image is located, and the first preset included angle includes 90 ° -180 °. Preferably, the first preset included angle is 135 °. The arrangement is such that the first image distance of the first virtual image 5 is larger than the second image distance of the second virtual image 6.

The reference source 2 is arranged such that the reference image displayed by the reference source 2 passes through the imaging module to form a second virtual image 6 having a second image distance in a predetermined area around the first virtual image 5.

And the observation interface is arranged opposite to the imaging module so as to observe the first virtual image 5 and the second virtual image 6 through the window.

The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present application, and are not meant to limit the scope of the utility model, but to limit the scope of the utility model.

Claims (10)

1. A display device, comprising:

an image source for displaying a main image;

a reference source for displaying a reference image;

the imaging module is arranged opposite to the image source and the reference source respectively, and a main image displayed by the image source forms a first virtual image with a first image distance through the imaging module; forming a second virtual image with a second image distance in a preset area around the first virtual image by the imaging module according to the reference image displayed by the reference source, wherein the second image distance is smaller than the first image distance;

and the observation interface is arranged opposite to the imaging module so as to observe the first virtual image and the second virtual image through the observation interface.

2. A display device according to claim 1, wherein,

the reference source is arranged in front of the image source,

the reference source comprises a display screen, a first preset included angle is formed between the plane where the reference source is located and the plane where the main image is located, and the first preset included angle is within the range of 90-180 degrees.

3. A display device according to claim 2, wherein,

the reference source includes a lamp disposed in front of the image source.

4. A display device according to claim 3, wherein,

the reference source includes a plurality of lamps disposed at least partially in front of the image source in a first direction including a component having a front-to-back direction.

5. A display device according to claim 4, wherein,

the plurality of lamps are partially disposed on a plane in which the main image lies.

6. A display device according to claim 4 or 5, wherein,

the plurality of lamps are uniformly arranged.

7. A display device according to claim 1, wherein,

the imaging module comprises a spectroscope which is respectively arranged opposite to the image source and the reference source;

and the concave reflecting mirror is arranged opposite to the spectroscope.

8. A display device according to claim 7, wherein,

and a second preset included angle is formed between the plane where the main image is located and the spectroscope, and the second preset included angle comprises a 45-degree included angle.

9. A display device according to claim 1, wherein,

the second virtual image has an entrance luminance of less than 100nit.

10. A display device according to claim 2, wherein,

the first preset included angle is 135 degrees.

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