WO2023220947A1

WO2023220947A1 - Defocus display system

Info

Publication number: WO2023220947A1
Application number: PCT/CN2022/093414
Authority: WO
Inventors: 沈文睿; 姚俊; 程德文; 刘玥; 张江红; 赵阳; 朱剑锋
Original assignee: 上海睿视健康科技有限公司
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2023-11-23
Also published as: CN117425849A

Abstract

The present invention relates to the field of image display, and in particular to a defocus display system. The defocus display system comprises: a first image source presenting a first image; a second image source presenting a second image; and an optical path system comprising at least one optical imaging device. The optical path system is opposite to the first image source and forms a first image having a first imaging distance for the first image source; the optical path system is opposite to the second image source and forms a second image having a second imaging distance for the second image source; the second imaging distance is greater than the first imaging distance, wherein the optical path system further comprises an observation interface which corresponds to the first image and the second image, such that the first image and the second image can be observed at the same time by means of the observation interface. According to the defocus display system, the imaging distance of more than two images can be respectively adjusted in a targeted manner, such that the defocus display system generates defocus stimulation on an observer to inhibit the elongation of an ocular axis.

Description

A defocused display system

Technical field

The present disclosure relates to the field of image display, and in particular to an out-of-focus display system.

Background technique

Myopia is a social problem. Existing research shows that myopic defocus can effectively suppress the side length of the eye axis, and can even achieve the effect of shortening the eye axis. Moreover, the positive defocus stimulation effect in the central area of vision is much stronger than that in the edge field of view. Positive out-of-focus stimulation. In the existing technology, glasses with positive defocus stimulation are used to turn part of the real space into an image, and the resulting image is presented in front of the retina to generate a force that pulls the retina forward, so that the resulting image falls on the retina to obtain Clear images, preventing axial length or even shortening of the axial length.

Contents of the invention

The present disclosure is proposed based on the above-mentioned needs of the prior art. The technical problem to be solved by the present disclosure is to provide a defocus display system that can adjust the imaging distance of two or more images in a targeted manner to make it more visible to the observer. Produce out-of-focus stimulation to inhibit axial elongation.

In order to solve the above problems, the technical solutions provided by this disclosure include:

An out-of-focus display system is provided, including: a first image source, presenting a first image; a second image source, presenting a second image; and an optical path system, including at least one optical imaging device; the optical path system and the third An image source is arranged oppositely to form a first image with a first imaging distance for the first image source; the optical path system is arranged oppositely to the second image source to form a first image with a second imaging distance for the second image source. The second image, the second imaging distance is greater than the first imaging distance; wherein, the optical path system also includes an observation interface, which is provided corresponding to the first image and the second image, so as to simultaneously observe the first image through the observation interface. The first image and the second image.

The optical path system is used to make the first image and the second image respectively become a first image with a first imaging distance and a second image with a second imaging distance, and the second imaging distance is greater than the The first imaging distance is such that when an observer watches through the observation interface, the first image and the second image fall at different positions within the eye, thereby forming a myopic out-of-focus stimulus.

Preferably, the optical imaging device includes one or more of a reflecting mirror and a transmitting mirror.

So arranged to achieve imaging through a reflecting mirror or a transmitting mirror.

Preferably, the first image and the optical imaging device have a first object distance, and the second image and the optical imaging device have a second object distance; the first imaging distance is greater than the first object distance. , the second imaging distance is greater than the second object distance.

This setting can present a magnified image with a certain distance so that the observer can see it more clearly.

Preferably, the first image includes at least one of a real image and a virtual image; and the second image includes at least one of a real image and a virtual image.

Preferably, when an observer observes the first image and the second image through the observation interface, the first image falls on the observer's retina, and the second image falls in front of the observer's retina; When the observer observes the first image, the second image produces an out-of-focus stimulus to the observer.

The first image viewed through the observation interface falls on the observer's retina, and the second image falls in front of the observer's retina. There is a certain distance between the image plane of the first image and the image plane of the second image. The interval is such that when the observer observes the first image, the second image can produce a certain defocus stimulus to the observer, so that the retina has a tendency to move forward, thereby preventing the eye axis from elongating backward, or even It has the effect of shortening the axial length of the eye.

Preferably, the optical path system includes an optical imaging device, and the optical imaging device includes: a first beam splitter, including a first side opposite to the first image source and the second image source and a side away from the first image source. the second side of the image source and the second image source; the first beam splitter reflects a part of the light it receives and transmits a part; a concave reflector, the concave reflector is connected to the first beam splitter The mirrors are arranged opposite to each other, and the concave reflecting mirror has a concave reflecting surface to reflect the received light; the light emitted by the first image source and the light emitted by the second image source are coupled.

The first beam splitter transmits part of the received light to reduce the brightness of the image, ensure a good viewing experience for the observer, and prevent excessive light from irritating the eyes; the concave reflector and The first beam splitter is arranged oppositely so that the light reflected by the first beam splitter can be smoothly incident on the concave reflector; the light emitted by the first image source and the light emitted by the second image source The light is coupled so that an observer can simultaneously view the first image and the second image through the observation interface.

Preferably, the observation interface includes the second side of the first beam splitter.

This arrangement enables an observer to view the first image and the second image from the second side of the first beam splitter.

Preferably, the first image source includes a first display, and the first display presents the first image; the second image source includes a second display, and the second display presents the second image.

It is so arranged that the first image displayed by the first display and the second image displayed by the second display emit light input into the optical system.

Preferably, the normal angle between the plane where the first display is located and the concave reflector is greater than 90°, and the normal angle between the concave reflector and the first beam splitter is 15° to 85°. .

It is so arranged that the concave reflector will not receive the light emitted by the first display, so as to prevent the concave reflector from reflecting the light to cause interference to the first and second images formed; by limiting the The normal angle between the concave reflector and the first beam splitter is such that the light emitted through the first beam splitter can be incident on the concave reflector.

Preferably, the optical system further includes a light path adjustment device; the light of the second image is applied to the optical imaging device through the light path adjustment device to form a second image.

This arrangement is such that when the space is limited, the second image has a certain range of image distance after being adjusted by the optical path adjustment device, so that the myopia out-of-focus stimulus has a corresponding adjustment range.

Preferably, when an observer simultaneously observes the first image and the second image through the observation interface, the first display and the second display are located outside the visible area of the observer.

Such an arrangement enables an observer to not see the first display and the second display when viewing the observation interface, let alone the images displayed by the first display and the second display. images to avoid disturbing the observer and affecting the viewing and display effects.

Preferably, the light path system further includes a light path adjustment device, the light path adjustment device includes a second beam splitter; the first display is arranged at a first relative position of the second beam splitter to adjust the first display to the first relative position of the second beam splitter. The emitted light is applied to the optical imaging device through the second beam splitter; the second display is arranged at a second relative position of the second beam splitter to pass the light emitted by the first display through The second spectroscopic reflection is applied to the optical imaging device.

This arrangement is used to increase the second imaging distance through the second beam splitter and at the same time weaken the brightness of the images on the first display and the second display to protect the eyes to a certain extent and reduce the impact of excessive light on the eyes. Influence.

Preferably, the second display is disposed on the first side of the second beam splitter; the first display is disposed on the second side of the second beam splitter.

Preferably, the normal angle between the first beam splitter and the second beam splitter is 25° to 155°.

This arrangement enables light reflected by the first beam splitter to be incident on the second beam splitter.

Preferably, the light path adjustment device further includes a first reflector, the first reflector is disposed opposite to the second display, and the first reflector is disposed opposite to the first side of the second beam splitter.

The first reflector is arranged opposite to the second display so that the light emitted by the second display is incident on the first reflector, and the first reflector and the second beam splitter are One side is arranged oppositely so that the light reflected by the first reflector can be incident on the second beam splitter and reflected out by the second beam splitter.

Preferably, the optical path system includes an adjustment mechanism, and the adjustment mechanism adjusts at least one of the first image and the second image, so that when an observer observes the first image through the observation interface, the second image The diopter of the image phase varies between 0-5D.

This arrangement enables the optical path system to adjust the stimulation amount of myopia defocus according to the observer's eye conditions, so as to have a good adjustment effect on the observer's eyes.

Preferably, the ratio of the light intensity of the first image to the second image is 50 to 0.2.

On the premise that the image plane of the first image and the image plane of the second image are different, by adjusting the light intensity of the first image and the second image, the first image and the second image are While providing myopia and defocus stimulation, it achieves a balance between experience and effect.

Preferably, the first imaging distance is 3-5m; the difference between the diopter of the first image and the diopter of the second image is 0.2D to 5.5D. .

Such a setting makes the observer observe the main image at a relatively far distance anyway. In this case, defocus plays a certain role and can have a certain effect.

Preferably, the concave reflector includes spherical, aspherical and free-form surface reflectors, and the radius of curvature of its center point is 200 to 1500 mm.

Preferably, the first reflector includes a plane reflector or a spherical reflector, and the center point radius of curvature is greater than or equal to 200 mm.

Preferably, a quarter wave plate is provided in front of the first display and the second display.

Through the above arrangement, the stray light generated by the external ambient light passing through the first beam splitter and the concave reflector is eliminated.

Preferably, the first image source is a main image source, and the first image is a main image; the second image source is an out-of-focus image source, and the second image is an out-of-focus image; the main image source The image of the main image having a first imaging distance is formed through the optical imaging device, and the defocused image source is formed into an image of the defocused image having a greater than the first imaging distance through the optical imaging device, so as to observe When the main image is used, the out-of-focus image produces out-of-focus stimulation to the observer.

Through the optical imaging device, the first image and the second image are respectively formed into a first image with a first imaging distance and a second image with a second imaging distance, and the second imaging distance is greater than the The first imaging distance is such that when an observer watches through the observation interface, the first image and the second image fall at different positions within the eye, thereby forming a myopic out-of-focus stimulus.

Preferably, the second display is disposed at the upper left side of the optical imaging device, the second display is disposed opposite to the second beam splitter, and the second beam splitter is disposed opposite to the first beam splitter.

Through the above arrangement, long-distance imaging is achieved in a limited space, and through the arrangement of the optical imaging devices, a first image and a second image with different image distances are formed, wherein the first image can be presented on the retina. On the top, the second image is presented in front of the retina, and the two work together to form myopic defocus stimulation, which can effectively prevent the elongation of the eye axis, and even shorten the eye axis to a certain extent. Preferably, the second display is disposed on the upper right side of the optical imaging device, the second display is disposed opposite to the second beam splitter, and the second beam splitter is disposed opposite to the first beam splitter.

Preferably, the second display is disposed on the upper right side of the optical imaging device, the second display is disposed opposite to the second beam splitter, and the second beam splitter is disposed opposite to the first beam splitter.

Preferably, the second display is disposed on the upper left side of the optical imaging device, the second display is disposed opposite to the first reflector, and the first reflector is disposed opposite to the second beam splitter, The second beam splitter is arranged opposite to the first beam splitter.

Preferably, the second display is disposed on the upper right side of the optical imaging device, the second display is disposed opposite to the first reflector, and the first reflector is disposed opposite to the second beam splitter, The second beam splitter is arranged opposite to the first beam splitter.

Through the above arrangement, long-distance imaging is achieved in a limited space, and through the arrangement of the optical imaging devices, a first image and a second image with different image distances are formed, wherein the first image can be presented on the retina. On the top, the second image is presented in front of the retina, and the two work together to form myopic defocus stimulation, which can effectively prevent the elongation of the eye axis, and even shorten the eye axis to a certain extent.

Compared with the prior art, the present disclosure can arrange multiple optical elements in a limited space so that the observer can see the first image with a first imaging distance between 3-5m through the observation interface. image, and a second image longer than the first imaging distance, so that the observer can observe the first image at a relatively far distance, and the first image can fall on the observer's retina. , the second image will be presented at a position further than the imaging distance of the first image, and the second image will fall in front of the observer's retina, thereby producing corresponding myopic defocus stimulation. The first image and the second image work together to effectively prevent the axial length of the eye, and can even shorten the axial length of the eye to a certain extent.

Description of the drawings

In order to more clearly explain the embodiments of this specification or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some of the embodiments described in the embodiments of this specification. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

Figure 1 is a schematic diagram of the optical path used to form the first image according to the present disclosure;

Figure 2 is a schematic diagram of the optical path used to form the second image according to the present disclosure;

Figure 3 is a schematic diagram of the light path for simultaneously forming the first image and the second image according to the present disclosure;

Figure 4 is a schematic diagram of another optical path for forming a second image according to the present disclosure;

Figure 5 is a schematic diagram of another optical path for simultaneously forming the first image and the second image according to the present disclosure;

Figure 6 is a schematic diagram of another optical path for forming the second image according to the present disclosure;

Figure 7 is a schematic diagram of the optical path for simultaneously forming the first image and the second image according to the present disclosure;

Figure 8 is a schematic diagram of another optical path for forming the second image according to the present disclosure;

Figure 9 is a schematic diagram of the optical path for simultaneously forming the first image and the second image according to the present disclosure.

Reference signs:

1. The first beam splitter; 2. Quarter wave plate; 3. Concave reflector; 4. The first display; 5. The second beam splitter; 6. The second display; 7. The first reflector; 8. The first side; 9. The second side.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments These are part of the embodiments of this application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

In the description of the embodiments of the present disclosure, it should be noted that, unless otherwise clearly stated and limited, the term "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

The terms “top,” “bottom,” “above,” “lower” and “on” are used throughout the description to refer to relative positions with respect to components of the device, such as the top and bottom substrates within the device relative position. It is understood that the installations are multi-functional, regardless of their orientation in space.

In order to facilitate understanding of the embodiments of the present application, specific embodiments will be further explained below with reference to the accompanying drawings. The embodiments do not constitute limitations to the embodiments of the present application.

This embodiment provides a defocus display system, see Figures 1-9.

The defocused display system includes a first image source, a second image source and an optical path system.

The first image source includes a first display 4, and the first display 4 presents a first image; correspondingly, the second image source includes a second display 6 and a light path adjustment device, and the second display 6 presents a first image. Two images.

The optical path system includes at least one optical imaging device, forming an optical path between the optical imaging devices; the optical system is arranged opposite to the first image source, and has a first imaging distance for the first image source. First image; correspondingly, the optical system is arranged opposite to the second image source to form a second image with a second imaging distance for the second image source, and the second imaging distance is greater than the first imaging distance. ; Wherein, the optical path system also includes an observation interface, which is provided corresponding to the first image and the second image, so that the first image and the second image can be simultaneously observed through the observation interface.

The optical imaging device includes one or more of a reflecting mirror and a transmitting mirror. By arranging and/or combining the optical imaging devices to apply the reflection or transmission law of light, the first image and the first image can be combined with each other. The second images are respectively formed into a first image at a first imaging distance and a second image at a second imaging distance. Further, the first image includes at least one of a real image and a virtual image, and similarly, the second image includes at least one of a real image and a virtual image. That is to say, the first image and the second image finally presented are not limited to the nature of the images, that is, they can be real images or virtual images.

The observation interface is a medium for observing the first image and the second image, and may be a window. The window is an opening on a mechanical structure. No light-transmitting optical imaging device is provided in the opening, and only through Air is used as a propagation medium to observe the first image and the second image; it can also be an optical imaging device that transmits light for observation, which is equivalent to placing some kind of transparent device between the image and the observer. An optical imaging device that emits light so that an observer can view an image through the optical imaging device. In short, as long as the first image and the second image can be observed through a certain medium, any medium can be used as an observation interface.

The observation interface, the first image and the second image are set correspondingly, and the corresponding settings include a variety of situations, as long as the observer can see the first image and the second image through the observation interface. When imaging, the positional relationship between the observation interface, the first image and the second image all belong to corresponding settings. For example, an observer can directly observe the first image and the second image through the observation interface, or can observe the first image and the second image through a certain optical path transmission.

Further, the first image and the optical imaging device have a first object distance, and the second image and the optical imaging device have a second object distance; the first imaging distance is greater than the first object distance. , the second imaging distance is greater than the second object distance. This setting can present a magnified image with a certain distance so that the observer can see it more clearly. Further, the first imaging distance is 3-5 m, and the difference between the diopter of the first image and the diopter of the second image is 0.2D to 5.5D. This arrangement enables the observer to observe the first image at a relatively far distance, and the second image will be presented at a position further than the imaging distance of the first image to generate a second image. Myopic defocus stimulus. By setting a certain difference between the refractive power of the first image and the refractive power of the second image, both the first image and the second image are set to be formed at a longer distance to prevent the The first image and the second image are too close to the observer to a certain extent, causing the presented image to fall behind the observer's retina, thereby generating a force that pulls the retina to move backward, exacerbating the observer's myopia.

Furthermore, the optical imaging device includes a first beam splitter 1 and a concave mirror 3 . The light emitted by the first image and the second image source passes through the first beam splitter 1 and the concave reflector 3 in sequence for imaging.

The spectroscope can reflect and transmit the received light. A part of the received light will change the direction of propagation on the spectroscope and return to the direction of the luminous material, and a part of the light will be emitted through transmission. The transmission is the phenomenon of incident light passing through an object after being refracted. A spectroscope has a reflection value (R) and a transmission value (T). The splitting ratio, that is, the value of R:T, is usually used to characterize the reflection and transmission of the spectroscope. In the present disclosure, a part of the light will be filtered out by using the transmission of the spectroscope to change the brightness of the final image and avoid unnecessary irritation to the eyes caused by excessive brightness.

The first beam splitter 1 includes a first side 8 opposite to the first image source and a second side 9 away from the first image source. Further, the light splitting ratio is 1:9-9:1.

Reflectors, which work using the laws of reflection to change the direction of light.

The concave reflector 3 is arranged opposite to the first beam splitter 1 and has a concave reflective surface to change the propagation direction of the received light. The concave reflector 3 can be a spherical reflector, an aspherical reflector or a free-form surface reflector, and the center point curvature radius of the concave reflector 3 is 200 to 1500 mm.

In the light path system, the first image source and the second image source emit light. Furthermore, the first display 4 and the second display 6 emit light. The first display 4 and the second image source emit light. The second display 6 may be LCD (abbreviation for Liquid Crystal Display, liquid crystal display), or may be AMOLED (Active-matrix organic light-emitting diode, active matrix organic light-emitting diode or active matrix organic light-emitting diode) . A quarter-wave plate 2 is provided in front of the first display 4 and the second display 6. The quarter-wave plate 2 allows when light of a certain wavelength is vertically incident and passes through. The phase difference between the abnormal lights is 1/4 wavelength. The first display 4 is arranged opposite to the first side 8 of the first beam splitter 1 , and the first image presented on the first display 4 is emitted by the quarter-wave plate 2 first. The first beam splitter 1, a part of the light received by the first beam splitter 1 passes through the first beam splitter 1 in a transmission manner, thereby reducing the brightness of the first image to prevent the final Excessive imaging affects the viewing effect; part of the light changes its propagation direction through reflection and is emitted toward the concave reflector 3 . Further, the normal angle between the concave reflector 3 and the first display 4 is greater than 90°, so that the light emitted by the first image will not be directly incident on the concave reflector 3, Moreover, it will not be reflected through the concave reflector 3. This arrangement prevents the light reflected through the concave reflector 3 from causing interference and affecting the final imaging result. Furthermore, controlling the normal angle between the concave reflector 3 and the first beam splitter 1 within the range of 15° to 85° can effectively limit the propagation path of the light and avoid adding unnecessary light. The stray light affects the viewing effect or distracts the observer's attention. The light reflected by the first beam splitter 1 diverges outward, and a virtual image is formed by the intersection of the reverse extension lines of the actual light. The virtual image falls within one focal point of the concave reflector 3. When reflected by the concave reflector 3 again, an enlarged and erect first virtual image will be formed. When an observer observes the first virtual image through the observation interface, the image he sees is the first image formed after the first virtual image is transmitted through the first spectroscope 1 . The first image has a first imaging distance and can be presented on the retina of an observer. Correspondingly, the second image source is arranged opposite to the first side 8 of the first beam splitter 1, and the light emitted by the second image source passes through the same optical imaging device as above in sequence: the first beam splitter. 1 and the concave reflector 3, and form a second virtual image. The second virtual image is an upright magnified virtual image presented by the second image source after it finally passes through the concave reflector 3. What an observer sees when observing the second virtual image through the observation interface The image is a second image formed after the second virtual image is transmitted through the first beam splitter 1 . The second image has a second imaging distance such that the second image appears in front of the observer's retina. The light emitted by the first image source and the light emitted by the second image source are coupled, so that an observer can simultaneously view the first image and the second image through the observation interface. The first image source and the second image source both incident part of the light onto the concave reflector 3 through the reflection of the first beam splitter 1, and the observer observes through the observation interface. The concave mirror 3 forms an upright magnified virtual image through reflection, and the virtual image includes a first image and a second image. Furthermore, external ambient light generates stray light after passing through the first beam splitter 1 and the first reflector 7, which will affect the imaging results of the first image and the second image. Therefore, the present disclosure uses light Polarization characteristics to eliminate stray light. Specifically, when the first display and the second display are LCDs, the emitted light is P-polarized light, and the quarter-wave plate 2 is set in front of the LCD. The fast axis of the quarter wave plate 2 is 45° to the P polarized light, which can change the P polarized light emitted from the LCD into circularly polarized light. The circular polarizer used is a linear polarizer gated in the S direction and the four It is composed of a quarter-wave plate 2. The fast axis of the quarter-wave plate 2 in the circular polarizing plate is parallel to the fast axis of the quarter-wave plate above the LCD. In the above way, the noise generated by the external environment is eliminated. Light is eliminated.

The first image and the second image work together to form a myopic defocus stimulus. In order to enable the observer to focus on the first image imaged on the retina, the first image and the second image can be changed. The brightness of the second image is adjusted so that the second image and the first image work together to provide myopic defocus stimulation while achieving a balance of experience and effect. Thus, the first image and the second image The ratio of the light intensity of the image is 50 to 0.2.

The first image and the second image work together to form a myopic defocus stimulus. The first image source is the main image source. The first image is the main image. Through the above-mentioned optical imaging device, the image of the main image is located. The image plane can be clearly imaged on the observer's retina, and further, the image of the main image is located within the observer's field of view. The second image source is an out-of-focus image source, and the second image is an out-of-focus image. The image of the out-of-focus image is formed through the above-mentioned optical imaging device, and the image plane of the image of the out-of-focus image is on the main image. in front of the image plane of the image, so that when the observer observes the main image, the image of the out-of-focus image falls in front of the observer's retina, thereby generating out-of-focus stimulation to the observer. That is, the image of the main image and the image of the out-of-focus image work together to produce a myopic out-of-focus stimulus to the observer. In addition, research and clinical data show that myopic defocus stimulation in the peripheral visual field can effectively suppress myopia, and the effect of myopic defocus stimulation in the central visual field is much stronger than that in the peripheral visual field. As a result, the second image can be distributed around the first image. In other words, the second image will be distributed outside the observer's field of view area, forming peripheral out-of-focus stimulation; the second image can also be distributed around the first image. Overlapping with the first image, that is, the second image is imaged within the observer's field of view area. Since the first image and the second image can appear in the form of virtual images through optical imaging devices, virtual images cannot Received by the light screen, when the two virtual images overlap, they can pass through each other to form an out-of-focus stimulus in the central area.

The optical path system also includes an adjustment mechanism that adjusts at least one of the first image and the second image so that when an observer observes the first image through the observation interface, the second image becomes the same. The diopter varies between 0-5D. The adjustment mechanism can adjust the first image and the second image respectively without affecting each other. The optical path adjustment structure can adjust the position of the optical device in the optical path system, thereby changing the first imaging distance and the second imaging distance. Exemplarily, the optical path between the first display 4 and the first beam splitter 2 is adjusted to adjust the first imaging distance, and the light path between the second display 6 and the first beam splitter 2 is adjusted. process to adjust the second imaging distance. Specifically, the adjustment mechanism can be used to adjust the positions of the first display 4 and the second display 6, thereby changing the imaging distance of the first image and the second image. When the positions of the display 4 and the second display 6 are adjusted, the first imaging distance needs to be controlled to be smaller than the second imaging distance, so that when an observer observes the first image through the observation interface, the The second image can vary between 0-5D diopter. Furthermore, the second image with a diopter of xD is a second image that an observer with emmetropia can see clearly wearing myopia glasses with a diopter of xD. For example, the second optical path system can provide a second image with a diopter of 2D, that is, a second image that an observer with emmetropic eyes can see clearly wearing 200-degree myopia glasses.

For different eye conditions of different observers, the position of the first display 4 can be adjusted to change the first imaging distance. The first imaging distance is 3-5m. The observer will be at a relatively far distance anyway. distance to observe the main image. In this case, defocus plays a certain role and can achieve a certain effect. The first image finally presented by the first image can fall on the observer's retina, so as to ensure that the observer's eye axis remains in a natural state when observing the first image, and there is no tendency to elongate the eye axis. By adjusting the position of the second display 6 so that the second imaging distance is greater than the first imaging distance, when the observer watches the first image, the second image falls in front of the retina, with A certain diopter. When the observer is watching, the second image appears as a blurred image so that the observer has the intention to see the second image clearly, thereby generating a force that pulls the retina to move forward to maintain the length of the eye axis. , even the effect of shortening the eye axis.

After determining the first imaging distance, the position of the second display 6 can be adjusted through the adjustment mechanism to change the second imaging distance, thereby changing the specific position where the second image falls in the eyes of the observer. The amount of myopic defocus is stimulated to match the observer's eye condition. By setting the second imaging distance, the length of the eye axis is suppressed, and a force that pulls the retina to move forward can even be generated to shorten the eye axis and reduce the degree of myopia.

The optical path system also includes an optical path adjustment device, which can change the imaging distance of the second image, reflect and/or transmit the second image to lengthen the imaging distance, and also adjust the first image. There will be an impact, but it will not have a major impact on the imaging distance of the first image. The light of the second image is applied to the optical imaging device through the light path adjustment device to form a second image. The optical path adjustment device includes a second beam splitter 5 . The second display 6 is disposed at a second relative position of the second beam splitter 5, and the second display 6 is disposed opposite to the first side 8 of the second beam splitter 5 to display the second The light emitted by the display 6 is reflected by the second beam splitter 5 and applied to the optical imaging device. Further, the normal angle between the first beam splitter 1 and the second beam splitter 5 is 25° to 155°.

Specifically, the second display 6 and the first side 8 of the second beam splitter 5 are arranged oppositely, and the second image presented on the second display 6 is emitted through the quarter-wave plate 2 The light passes through the second beam splitter 5, and part of the light passes through the second beam splitter 5 in a transmission manner. A part of the incident light changes the propagation direction on the second beam splitter 5 and is reflected to the above-mentioned optical system. On the imaging device, the observer sees the second image through the observation interface; the first display 4 is arranged on the second side 9 of the second beam splitter 5, and the light emitted by the first display 4 passes through Part of the transmission of the second beam splitter 5 passes through the second beam splitter 5 and is emitted to the optical imaging device, and the observer sees the second image through the observation interface.

In the first implementation of this embodiment, referring to Figures 1-3, the optical imaging device includes a first beam splitter 1 and a concave mirror 3, wherein the concave mirror 3 is an optical imaging device. The first display 4 is disposed on the upper left side of the optical imaging device and between the first beam splitter 1 and the concave reflector 3. The first beam splitter 1 is disposed on the left side and is connected to the first beam splitter. Opposite the display 4, the concave reflector 3 is arranged on the right side and forms an obtuse angle with the normal angle between the first display 4 and the first display 4 to prevent the light emitted by the first display 4 from being incident on the concave reflector. 3 will cause unnecessary interference to the entire optical path. In addition, the second display 6 is disposed on the left side of the optical imaging device, the light path adjustment device includes a second beam splitter 5, and a first display 4 is disposed at a first relative position of the second beam splitter 5 , the first display 4 is located on the second side 9 of the second beam splitter 5 , and is so configured that the light emitted by the first display 4 can be applied to the optical imaging through the second beam splitter 5 On the device; a second display 6 is provided at the second relative position of the second beam splitter 5, and the second display 6 is located on the first side 8 of the second beam splitter 5, so that the second display 6 can be The light emitted by the first display 4 is reflected by the second beam splitter 5 and applied to the optical imaging device. The first side 8 of the second beam splitter 5 is opposite to the first side 8 of the first beam splitter 1 to facilitate the light reflected by the second beam splitter 5 to enter the first beam splitter 1 on the first side 8. The light emitted by the first display 4 is incident on the second side 9 of the second beam splitter 5 , and part of the light is transmitted to the first side 8 of the first beam splitter 1 . The first beam splitter 1 The propagation direction of part of the incident light is changed and reflected onto the concave reflector 3 to form the first virtual image. The light emitted by the second display 6 is incident on the first side 8 of the second beam splitter 5 , a part of the light is transmitted through the second beam splitter 5 , and a part of the light will be changed by the second beam splitter 5 . The propagating reverse reflection is incident on the first side 8 of the first beam splitter 1 , and part of the light passes through the reflection of the first beam splitter 1 and is directed to the concave reflector 3 to form a second virtual image. Wherein, the light emitted by the second display 6 from the second dichroic mirror 5 to the first dichroic mirror 1 is coupled with the light emitted by the first display 4 towards the first dichroic mirror 1 . An observer simultaneously observes a first image and a second image through the observation interface at a position opposite to the first spectroscope 1. The first image and the second image are respectively obtained by passing through the first spectroscope. The first virtual image and the second virtual image transmitted by mirror 1. In addition, the second side 9 of the first beam splitter 1 can serve as the observation interface. Through the above arrangement, long-distance imaging is achieved in a limited space, and through the arrangement of the optical imaging devices, a first image and a second image with different image distances are formed, wherein the first image can be presented on the retina. On the top, the second image is presented in front of the retina, and the two work together to form myopic defocus stimulation, which can effectively prevent the elongation of the eye axis, and even shorten the eye axis to a certain extent.

In the second implementation of this embodiment, referring to FIGS. 1 and 4-5 , the type and arrangement of optical devices included in the optical imaging device and the arrangement of the first display 4 are the same as those in the above-described implementation. are the same and will not be repeated here. Different from the above implementation, the second display 6 is disposed on the upper right side of the optical imaging device, and the optical imaging device is the concave reflector 3 . The optical path adjustment device includes a second beam splitter 5 . Other arrangements are similar to those in the first embodiment. The arrangement of the second beam splitter 5 is adjusted according to the position of the second display 6 so that the light emitted by the second display 6 passes through the second beam splitter. The reflection of the mirror 5 is incident on the first dichroic mirror 1 , and the light emitted by the second display 6 to the first dichroic mirror 1 and the light emitted by the first display 4 to the first dichroic mirror 1 light coupling. Finally, the observer simultaneously observes the first image and the second image through the observation interface at a position opposite to the first spectroscope 1. The first image and the second image are respectively obtained by passing through the first beam splitter 1. A beam splitter 1 transmits a first virtual image and a second virtual image. Through the above arrangement, long-distance imaging is achieved in a limited space, and through the arrangement of the optical imaging devices, a first image and a second image with different image distances are formed, wherein the first image can be presented on the retina. On the top, the second image is presented in front of the retina, and the two work together to form myopic defocus stimulation, which can effectively prevent the elongation of the eye axis, and even shorten the eye axis to a certain extent.

The optical path adjustment device includes a second beam splitter 5 and a first reflector 7 . The first reflector 7 is arranged opposite to the first side 8 of the second beam splitter 5 . One side 8 is opposite to the first side 8 of the first beam splitter 1 . The second display 6 is disposed at a second relative position to the second beam splitter 5 to reflect the light emitted by the first display 4 through the second beam splitter 5 and apply it to the optical imaging device. Further, the first reflector 7 includes a plane reflector or a spherical reflector, and the center point curvature radius is greater than or equal to 200 mm. The normal angle between the first beam splitter 1 and the second beam splitter 5 is 25° to 155°, so that the light reflected by the second beam splitter 5 can be incident on the third beam splitter. On a beam splitter 1.

It should be noted that the first reflector 7 mentioned above includes a plane reflector or a spherical reflector. Anything that can reflect light can replace the first reflector 7 . For example, the light splitter can be used. mirror instead.

Specifically, the second display 6 and the first reflective mirror 7 are arranged oppositely, and the first reflective mirror 7 is arranged oppositely to the first side 8 of the second beam splitter 5 . The second image presented on the second display 6 emits light through the quarter-wave plate 2 and passes through the first reflector 7, and the reflected light is incident on the second beam splitter 5, A part of the light passes through the second dichroic mirror 5 in a transmission manner, and a part of the light is incident on the second dichroic mirror 5 and changes its propagation direction and is reflected to the above-mentioned optical imaging device and forms a second virtual image. Observe The image seen through the observation interface is the second image formed after the second virtual image is transmitted through the first beam splitter 1 .

In the third implementation of this embodiment, referring to Figures 1 and 6-7, the type and arrangement included in the optical imaging device and the arrangement of the first display 4 are the same as in the above-mentioned implementation. I won’t go into details here. The second display 6 is arranged on the upper left side of the optical imaging device. The optical imaging device is a concave reflector 3. The light path adjustment device includes a second beam splitter 5 and a first reflector 7. The first The display 4 is arranged at a first relative position of the second beam splitter 5, and the first display 4 is located on the second side 9 of the second beam splitter 5, so that the first display 4 can emit light. The light is applied to the optical imaging device through the second beam splitter 5; the second display 6 is arranged opposite to the first reflecting mirror 7, so that the first reflecting mirror 7 can receive the light from For the light emitted by the second display 6, the first reflecting mirror 7 is arranged opposite to the first side 8 of the second beam splitter 5, so that the second beam splitter 5 can receive the second beam splitter 5. The light reflected by a reflecting mirror 7 then applies the light emitted by the second display 6 to the optical imaging device. The light emitted by the first display 4 passes through the second beam splitter 5 , the first beam splitter 1 and the concave reflector 3 in sequence, and presents a first virtual image under the action of the concave reflector 3 . The light path in this embodiment is consistent with the propagation path of the light emitted by the first display 4 in the first embodiment, and will not be further described. The light emitted by the second display 6 is first incident on the first reflecting mirror 7, and the propagation direction of the light is changed through the first reflecting mirror 7 to be incident on the first side 8 of the second beam splitter 5, Part of the light will change its propagation through the second dichroic mirror 5 and be retroreflected and incident on the first side 8 of the first dichroic mirror 1 , where part of the light will pass through the reflection of the first dichroic mirror 1 to be reflected. A second virtual image is formed toward the concave reflector 3 . Wherein, the light emitted by the second display 6 from the second dichroic mirror 5 to the first dichroic mirror 1 is coupled with the light emitted by the first display 4 towards the first dichroic mirror 1 . An observer simultaneously observes a first image and a second image through the observation interface at a position opposite to the first spectroscope 1. The first image and the second image are respectively obtained by passing through the first spectroscope. The first virtual image and the second virtual image transmitted by mirror 1. Compared with the first embodiment, this embodiment increases the second imaging distance of the second image by adding a first reflector 7 so that the second imaging distance has a wider adjustment range. When an image falls on the observer's retina, by changing the position of the second display 6 to change the second imaging distance of the second image so that it is imaged in front of the retina, they work together to form myopic defocus stimulation, which can effectively prevent Elongation of the axial length of the eye.

In the fourth implementation of this embodiment, referring to FIGS. 1 and 8-9 , the type and arrangement of the optical imaging devices and the arrangement of the first display 4 are the same as in the above-described implementation, and there are no details here. Again. The second display 6 is disposed on the upper right side of the optical imaging device. The optical path adjustment device includes a second beam splitter 5 and a first reflector 7. Other arrangements are similar to those in the third embodiment. The arrangement of the first reflecting mirror 7 and the second dichroic mirror 5 will be adjusted according to the position of the second display 6 so that the light emitted by the second display 6 is reflected by the first reflecting mirror 7 and The reflection of the second dichroic mirror 5 is incident on the first dichroic mirror 1, and the light emitted by the second display 6 to the first dichroic mirror 1 and the light emitted by the first display 4 to the The light from the first beam splitter 1 is coupled. Finally, the observer simultaneously observes the first image and the second image through the observation interface at a position opposite to the first spectroscope 1. The first image and the second image are respectively obtained by passing through the first beam splitter 1. A beam splitter 1 transmits a first virtual image and a second virtual image. Compared with the second embodiment, the above setting has a wider range for adjusting the second imaging distance of the second image, and thus has a wider amount of myopic defocus stimulation, which is beneficial to the adjustment of the second imaging distance of the first image. While landing on the observer's retina, by setting the second imaging distance within the adjustment range, the amount of myopic defocus stimulation of the second image on the retina can be controlled, thereby effectively preventing the elongation of the eye axis.

In addition, when an observer observes the first image and the second image through the observation interface, the first display 4 and the second display 6 are located outside the visible area of the observer. In the above four embodiments, the observer observes the first image and the second image at a position opposite to the first beam splitter 1, and the first display 4 and the second display 6 They are all arranged at the upper left and upper right of the first beam splitter 1. These positions are outside the observer's field of view, that is, the observer cannot directly observe the first display 4 and the second display. Image shown on 6. Such an arrangement can effectively prevent the light emitted by the first display 4 and the second display 6 from interfering with the observer, so that the observer can only see the first image and the second image when observing. .

The above-mentioned specific embodiments further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above-mentioned are only specific embodiments of the present application and are not intended to limit the scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

A defocused display system, characterized by including:

The first image source presents the first image;

a second image source, presenting a second image;

as well as

Optical path system, including at least one optical imaging device; the optical path system is arranged opposite to the first image source, and forms a first image with a first imaging distance for the first image source; the optical path system and the second image The sources are arranged relatively to form a second image with a second imaging distance for the second image source, and the second imaging distance is greater than the first imaging distance;

Wherein, the optical path system further includes an observation interface, which is provided corresponding to the first image and the second image, so that the first image and the second image can be simultaneously observed through the observation interface.
A defocus display system according to claim 1, characterized in that the optical imaging device includes one or more of a reflective mirror and a transmissive mirror.
A defocus display system according to claim 1, characterized in that:

The first image and the optical imaging device have a first object distance, and the second image and the optical imaging device have a second object distance;

The first imaging distance is greater than the first object distance, and the second imaging distance is greater than the second object distance.
A defocus display system according to claim 1, characterized in that:

The first image includes at least one of a real image and a virtual image; the second image includes at least one of a real image and a virtual image.
A defocus display system according to claim 1, characterized in that:

When an observer observes the first image and the second image through the observation interface, the first image falls on the observer's retina, and the second image falls in front of the observer's retina; so that the observer When observing the first image, the second image produces an out-of-focus stimulus to the observer.
A defocus display system according to claim 1, characterized in that the optical path system includes an optical imaging device, and the optical imaging device includes:

a first beam splitter, including a first side opposite to the first image source and the second image source and a second side away from the first image source and the second image source; the first beam splitter The mirror reflects part of the light it receives and transmits part;

Concave reflector, the concave reflector is arranged opposite to the first beam splitter, the concave reflector has a concave reflecting surface to reflect the received light;

The light emitted by the first image source and the light emitted by the second image source are coupled.
An out-of-focus display system according to claim 6, wherein the observation interface includes the second side of the first beam splitter.
A defocus display system according to claim 6, characterized in that:

the first image source includes a first display, the first display presenting the first image;

The second image source includes a second display that presents the second image.
A defocus display system according to claim 8, characterized in that:

The normal angle between the plane where the first display is located and the concave reflector is greater than 90°, and the normal angle between the concave reflector and the first beam splitter is 15° to 85°.
A defocus display system according to claim 8, characterized in that:

The optical system also includes an optical path adjustment device;

The light of the second image is applied to the optical imaging device through the light path adjustment device to form a second image.
A defocus display system according to claim 8, characterized in that:

When an observer simultaneously observes the first image and the second image through the observation interface, the first display and the second display are located outside the visible area of the observer.
A defocus display system according to claim 8, characterized in that the optical path system further includes an optical path adjustment device, and the optical path adjustment device includes a second beam splitter;

The first display is disposed at a first relative position of the second beam splitter to apply the light emitted by the first display to the optical imaging device through the second beam splitter;

The second display is disposed at a second relative position of the second beam splitter to reflect the light emitted by the first display onto the optical imaging device through the second beam splitter.
A defocus display system according to claim 12, characterized in that:

A second display is disposed on the first side of the second beam splitter;

The first display is disposed on the second side of the second beam splitter.
A defocus display system according to claim 13, characterized in that:

The normal angle between the first beam splitter and the second beam splitter is 25° to 155°.
A defocus display system according to claim 12, characterized in that:

The optical path adjustment device further includes a first reflector, the first reflector is disposed opposite to the second display, and the first reflector is disposed opposite to the first side of the second beam splitter.
A defocus display system according to claim 1, characterized in that:

The optical path system includes an adjustment mechanism that adjusts at least one of the first image and the second image so that when an observer observes the first image through the observation interface, the second image is Diopter varies between 0-5D.
A defocus display system according to claim 1, characterized in that:

The ratio of the light intensity of the first image and the second image is 50 to 0.2.
A defocus display system according to claim 1, characterized in that:

The first imaging distance is 3-5m;

The difference between the refractive power of the first image and the refractive power of the second image is 0.2D˜5.5D.
A defocus display system according to claim 6, characterized in that:

The concave reflector includes spherical, aspheric and free-form surface reflectors, and the radius of curvature of its center point is 200 to 1500 mm.
A defocus display system according to claim 15, characterized in that:

The first reflector includes a plane reflector or a spherical reflector, and the center point curvature radius is greater than or equal to 200 mm.
A defocus display system according to claim 8, characterized in that:

A quarter wave plate is provided in front of the first display and the second display.
A defocus display system according to claim 1, characterized in that:

The first image source is the main image source, and the first image is the main image;

The second image source is an out-of-focus image source, and the second image is an out-of-focus image;

The main image source is converted into an image of a main image having a first imaging distance via the optical imaging device, and the defocused image source is converted into an image having a defocused image greater than the first imaging distance via the optical imaging device. image, so that when observing the main image, the out-of-focus image produces an out-of-focus stimulus to the observer.
A defocus display system according to claim 14, characterized in that:

The second display is arranged at the upper left side of the optical imaging device, the second display is arranged opposite to the second beam splitter, and the second beam splitter is arranged opposite to the first beam splitter.
A defocus display system according to claim 14, characterized in that:

The second display is arranged on the upper right side of the optical imaging device, the second display is arranged opposite to the second beam splitter, and the second beam splitter is arranged opposite to the first beam splitter.
A defocus display system according to claim 15, characterized in that:

The second display is disposed on the upper left side of the optical imaging device, the second display is disposed opposite to the first reflector, and the first reflector is disposed opposite to the second beam splitter. The two beam splitters are arranged opposite to the first beam splitter.
A defocus display system according to claim 15, characterized in that:

The second display is disposed on the upper right side of the optical imaging device, the second display is disposed opposite to the first reflector, and the first reflector is disposed opposite to the second beam splitter. The two beam splitters are arranged opposite to the first beam splitter.