CN218917840U

CN218917840U - Defocused display glasses

Info

Publication number: CN218917840U
Application number: CN202223309634.4U
Authority: CN
Inventors: 程德文; 汪希萌
Original assignee: Beijing Ned+ Ar Display Technology Co ltd
Current assignee: Beijing Ned+ Ar Display Technology Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-04-25
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses an out-of-focus display glasses, which comprises: a lens for viewing ambient light; the lens is provided with an inner surface concave to human eyes, the center of the lens corresponds to a visual axis when the human eyes use, and the inner surface of the lens is provided with a light splitting film; at least one defocus unit disposed opposite an inner surface of the lens; the defocusing unit comprises an image source and a spectroscope; the image source is used for providing light to the spectroscope, part of the light is reflected to the inner surface of the lens by the surface of the spectroscope facing the lens, the inner surface of the lens reflects the received light to the exit pupil position according to the preset inverse transmittance ratio, and the human eyes at the exit pupil position are in defocused imaging. According to the defocusing display glasses provided by the utility model, through the normal perspective ambient light of the lenses and through the defocusing units, defocusing displayed images are formed in the center or periphery of the visual field of the human eyes, defocusing stimulation is carried out, and the eyesight of a user can be prevented and controlled.

Description

Defocused display glasses

Technical Field

The utility model relates to defocused display glasses, and belongs to the field of myopia prevention and control.

Background

The defocusing lens can move the focus projected on the back of the retina to the front of the retina, correct the central vision and peripheral vision of the retina, delay the development of the growth of the ocular axis and achieve the purpose of delaying the growth of myopia.

The defocus control lens generally adopts a local design mode for the perspective lens to deform the ambient light transmitted through the lens so as to realize the effect of peripheral defocus. Although the effect of peripheral defocusing stimulation is achieved, the imaging in the normal perspective direction is hindered, and the perspective view field of human eyes is influenced.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the defocusing display glasses, which realize defocusing stimulation in an augmented reality mode.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

an out-of-focus display glasses, comprising:

a lens for viewing ambient light; the lens is provided with an inner surface concave to human eyes, the center of the lens corresponds to a visual axis when the human eyes use, and the inner surface of the lens is provided with a light splitting film;

at least one defocus unit disposed opposite an inner surface of the lens;

the defocusing unit comprises an image source and a spectroscope; the image source is used for providing light for the spectroscope, part of the light is reflected to the inner surface of the lens by the surface of the spectroscope facing the lens, the inner surface of the lens reflects the received light to the exit pupil position according to the preset inverse transmittance ratio, and the light is in a converging state at the exit pupil position and is subjected to defocusing imaging at one side of the exit pupil position far away from the lens.

Preferably, the number of the defocus units is one, and the spectroscope is disposed in a normal direction of the lens center with respect to the inner surface of the lens.

Or, preferably, the number of the defocus units is plural, and the plurality of defocus units are uniformly distributed on the circumference of the lens with respect to the center of the lens, or are symmetrically distributed with a horizontal line or a vertical line passing through the center of the lens as a symmetry axis. Wherein the surface of the spectroscope facing the lens is oriented towards the center of the lens for splitting light rays emitted from the image source and passing over the center of the lens. Alternatively, the surface of the beam splitter facing the lens faces the outer periphery of the lens for splitting light emitted from the image source and not reaching the center of the lens.

Preferably, the number of defocus units is an odd number of not less than 3.

Preferably, the defocus unit further comprises a lens set disposed proximate to the image source.

Preferably, the beam splitter is a planar beam splitter or a concave beam splitter concave toward the lens.

Preferably, the image source is a display screen, or a light source with a mask.

Preferably, the lens further comprises an outer surface, the inner surface and the outer surface having a surface profile difference to create an optical power adapted to human eye vision.

According to the defocusing display glasses provided by the utility model, at least one defocusing unit is arranged on the surface of the side of the lens facing the eyes of a user, and defocusing images are formed at the central position or the periphery of the visual field of the eyes of the user, so that defocusing stimulation is realized, and the eyesight of the user is prevented and controlled. The defocused display glasses are used for superposing the defocused image on the environment image in an augmented reality mode, have no influence on the environment image in the perspective direction, do not influence the normal eyes of a user, and have a large visual field range.

Drawings

Fig. 1 is a perspective view of an out-of-focus display glasses according to a first embodiment;

FIG. 2 is a schematic view of the arrangement of the planar beam splitter in the defocus display glasses of FIG. 1;

FIG. 3 is a schematic view of the optical path of a set of defocus units in the defocus display glasses of FIG. 1;

fig. 4 is an eye-entering picture schematic diagram of the out-of-focus display glasses according to the first embodiment;

fig. 5 is a perspective view of the defocus display glasses according to the second embodiment;

FIG. 6 is a schematic view of the optical path of a set of defocus units in the defocus display glasses of FIG. 5;

fig. 7 is an eye-entering picture schematic diagram of an out-of-focus display glasses according to a second embodiment;

fig. 8 is a schematic view of an optical path of the defocus display glasses according to the third embodiment.

Detailed Description

The technical scheme of the utility model is further described in detail below with reference to the attached drawings and specific embodiments.

The utility model provides defocused display glasses, comprising: a lens and at least one defocus unit. The defocusing unit at least comprises an image source and a spectroscope; the lens is used for reflecting light rays emitted from an image source through the spectroscope and the inner surface of the lens, directing the light rays to a human eye positioned at an exit pupil position, and performing defocusing imaging in front of the retina of the human eye. The number of defocusing units can be one or a plurality. When the number of the defocusing units is one, the spectroscope is opposite to the center of the lens, is arranged in the normal direction of the center of the lens and coincides with the visual axis direction of human eyes, so that the center defocusing imaging is realized. When the number of the defocusing units is multiple, the defocusing units are discretely distributed on the periphery of the lens relative to the inner surface of the lens; the plurality of defocus units share the lens, and specifically, the plurality of defocus units perform peripheral defocus imaging with an area of an inner surface of the lens opposite to the spectroscope, respectively.

The following describes the structure of the defocus display glasses by taking the example of providing five defocus units, three defocus units and one defocus unit on the eye-facing side surface of the glasses lens, respectively. The following examples are illustrative only and are not to be construed as limiting the technical solutions of the present application.

First embodiment

An out-of-focus display glasses as shown in fig. 1 and 2, comprising: a lens 103 and a plurality of defocus units. Wherein, the liquid crystal display device comprises a liquid crystal display device,

the lens 103 is a circular lens with a diameter of about 70mm, and the lens 103 may be cut to a specific shape according to different designs to fit the frame. The lens 103 is for see-through ambient light, the lens 103 having an inner surface concave to the exit pupil position 101 and having an outer surface remote from the exit pupil position; the inner and outer surfaces of the lens 103 are contoured or the inner and outer surfaces of the lens 103 have a contoured difference to create optical power for adapting to the human eye vision of different users. The center of the lens 103 corresponds to the human eye's visual axis through the center of the exit pupil. A light splitting film is arranged in a part or all of the area of the inner surface of the lens 103 to form a concave spectroscope; more specifically, at least the inner surface area of the lens 103 that participates in out-of-focus imaging is attached with a spectroscopic film having a predetermined inverse transmittance ratio. In order to increase the brightness of the ambient light entering the eye, the inverse transmittance of the light splitting film may be greater than 1, for example, using a transmittance reflectance of 8:2, a light splitting film.

The plurality of defocus units are distributed discretely on the periphery of the central area of the lens 103 with respect to the inner surface of the lens 103. Preferably, the plurality of defocus units are uniformly distributed around the center of the lens 103 (i.e., the position corresponding to the visual axis) at the periphery of the lens 103, or the plurality of defocus units are symmetrically distributed at opposite sides of the lens 103 with respect to the horizontal or vertical line of the lens 103. The number of the defocusing units is preferably an odd number not less than 3, so that parasitic light interference among different defocusing units can be effectively prevented. In the first embodiment, the entire optical system is composed of 5 out-of-focus display optical paths shown in fig. 1 superimposed, each of which is distributed in the entire system at a uniform angle based on the center of the lens 103.

As shown in fig. 3, each defocus unit comprises an image source 104 and a beam splitter 102, the image source 104, the beam splitter 102 in combination with the inner surface of the lens 103 effecting defocus imaging with respect to the retina at the exit pupil location 101 on the side remote from the lens 103. The image source 104 is disposed at an edge of the lens 103 and is typically surrounded by a frame. The image source 104 emits light toward the center of the lens 103, and is configured to provide the beam splitter 102 with light, wherein a portion of the light is reflected by the surface of the beam splitter 102 facing the lens 103 to the inner surface of the lens 103, and the inner surface of the lens 103 reflects the received light to the human eye at the exit pupil position in a manner inclined with respect to the visual axis according to a predetermined lens-through ratio, and the light is in a converging state at the exit pupil position, and after entering the human eye, is imaged at a predetermined (fixed or variable) defocus at the periphery of the human eye visual field at a defocus plane, the defocus plane being located at a side of the exit pupil position away from the lens and closer to the pupil with respect to the human eye retina. The light rays can be transmitted through the beam splitter 102 after being reflected by the inner surface of the lens 103, or can be directly emitted to the human eye from the outside of the beam splitter 102. Whether the light reflected by the inner surface of the lens 103 is transmitted through the beam splitter 102 depends on the light path design; the transmission of this light through the beam splitter 102 is not a necessary process. The power of the out-of-focus image can also be adjusted, preferably by adjusting the distance between the image source 104 and the beam splitter 102, to fit the different visibility human eyes, resulting in an effective out-of-focus stimulus.

Specifically, the image source 104 employs a micro-display, for example, a high-brightness, high-resolution, miniaturized Micro OLED display screen. Alternatively, the image source 104 employs a light source with a mask. The two image sources can realize peripheral defocusing imaging.

The beam splitter 102 is a planar beam splitter or a curved beam splitter. When the beam splitter 102 is a concave beam splitter, the beam splitter is concave toward the image source side. The surface of the beam splitter 102 facing the lens 103 is provided with a beam splitter film, and the transmittance/reflectance ratio of the beam splitter 102 is preferably 5:5. the position of the beam splitter 102 on the inner surface of the lens 103 is divided into two types according to whether the light emitted from the image source 104 passes through the center of the lens 103: as shown in fig. 3, in the same defocus unit, the image source 104 and the beam splitter 102 are disposed on opposite sides with respect to the center of the lens 103; as shown in fig. 6, in the same defocus unit, the image source 204 and the beam splitter 202 are disposed on the same side with respect to the center of the lens 203. The former case will be described with reference to the first embodiment.

As shown in fig. 1 to 3, in the first embodiment, in the same defocus unit, an image source 104 and a spectroscope 102 are disposed on both sides of a lens 103 with respect to the center of the lens 103; the surface of the beam splitter 102 facing the lens 103 is directed towards the center of the lens 102 for splitting the light emitted from the image source 104 and passing over the center of the lens 103.

In addition, a single defocusing unit can also adopt a polarized light splitting film system; for example, a polarizing beam-splitting film is attached to the surface of the beam splitter 102 facing the lens 103, and a quarter-wave plate is disposed between the beam splitter 102 and the lens 103, so that the light energy utilization rate of the defocused image can be improved.

Table 1 shows parameters of each optical lens in the first embodiment, wherein the standard of the tilt angle is that the rotation angle in the clockwise direction is negative and the rotation angle in the counterclockwise direction is positive with the vertical direction shown as 0 °.

Table 1 parameters of each optical lens in the first embodiment

The screen shown in fig. 3 is a display screen observed by the user through the above-described out-of-focus display system, in which 5 out-of-focus images are displayed in the periphery of the center area in the display screen, corresponding to the 5 out-of-focus display optical path systems shown in fig. 2, respectively. Through the system, a user is stimulated by 5 defocused positions around the picture to correct myopia while normally observing the external environment, so that the functional purpose of myopia protection is realized.

Second embodiment

An out-of-focus display glasses as shown in fig. 5, comprising: a lens 203 and a plurality of defocus units. Wherein the structure of the lens 203 is similar to the first embodiment; the construction of the defocus unit is slightly different from the first embodiment. Only the portions where the two are different will be described below.

In this embodiment, the entire optical system is composed of 3 defocus units shown in fig. 5 superimposed, and the respective defocus units are distributed in the entire system at uniform angles based on the center of the lens 203.

As shown in fig. 5 and 6, each defocus unit comprises an image source 204, a lens set comprising cemented positive and

negative lenses

205 and 206, the positive-negative cemented lens helping to correct system chromatic aberration and shorten the light ray propagation path, and a beam splitter 202.

The image source 204, the lens assembly, and the beam splitter 202 combine with the inner surface of the lens 203 to achieve out-of-focus imaging. The image source 204 is disposed at an edge location of the lens 203 and is typically surrounded by a frame. The image source 204 emits light toward the center of the lens 203 for providing light to the beam splitter 202. The lens group is disposed proximate to the location of the image source 204. The surface of the spectroscope 202 facing the lens 203 is provided with a spectroscopic film. In the same defocus unit, the image source 204 and the beam splitter 202 are disposed on the same side of the lens 203 with respect to the center of the lens 203. The surface of the beam splitter 202 facing the lens 203 faces the edge of the lens 202 for splitting light emitted from the image source 204 and not reaching the center of the lens 203.

As shown in fig. 6, light is emitted from the micro display 204, and is transmitted from the cemented

lens groups

206, 205 to be incident on the planar beam splitter 202, and the transmittance/reflectance of the planar beam splitter 202 is preferably 5:5, the light is incident on the inner surface of the lens 203 after being reflected by the planar beam splitter 202, and the inner surface of the lens 203 forms a concave beam splitter, and the transmittance and reflectance ratio thereof is preferably 7:3, are transmitted from the planar beam splitter 202 into the human eye after being reflected by the concave beam splitter 203. After the light reaches human eyes, defocusing imaging is carried out on the periphery of the visual field of the human eyes.

The screen shown in fig. 7 is a display screen observed by the user through the defocus display glasses, in which 3 defocus images are displayed on the periphery of the center region, respectively corresponding to the 3 defocus optical path systems shown in fig. 5.

Table 2 shows parameters of each optical lens in the second embodiment, wherein the standard of the tilt angle is that the rotation angle in the clockwise direction is negative and the rotation angle in the counterclockwise direction is positive with the vertical direction shown as 0 °.

Table 2 parameters of each optical lens in the second embodiment

Through the defocusing display glasses, a user is stimulated by 3 defocusing positions around the picture to correct myopia while normally observing the external environment, so that the functional purpose of myopia protection of the system is realized.

Third embodiment

An out-of-focus display glasses as shown in fig. 8, comprising: a lens 303 and an defocus unit. Wherein the structure of the lens 303 is similar to the first embodiment; the construction of the defocus unit is slightly different from the first and second embodiments. Only the portions in which the differences exist will be described below.

In this embodiment, on the inner surface of the glasses 303 facing the human eye, there is only one defocus unit, which includes at least one image source 304 and one beam splitter 302, and may further include a lens group according to different optical path designs, as shown in fig. 8, the lens group includes a cemented positive lens 305 and a cemented negative lens 306, and the positive-negative cemented lens helps correct chromatic aberration of the system and shortens the light propagation path.

In this embodiment, the image source 304, the lens assembly, the beam splitter 302, and the inner surface of the lens 303 are combined to achieve out-of-focus imaging. The image source 304 is disposed at the edge of the lens 303 and is typically covered by the frame. The image source 304 emits light toward the center of the lens 303 for providing light to the beam splitter 302. The lens group is disposed proximate to the location of the image source 304. The surface of the spectroscope 302 facing the lens 303 is provided with a spectroscopic film. Unlike the first two embodiments, in this embodiment, the spectroscope 302 is disposed between the lens 303 and the human eye, and is disposed in a normal direction to the center of the lens 303 (coinciding with the visual axis direction when the human eye is in use) with respect to the center of the lens 303. The surface of the beam splitter 302 facing the lens 303 faces the image source 304, and is used for splitting light emitted from the image source 304 and reaching the center of the lens 303.

Light is emitted from the microdisplay 304 and is incident on the planar beam splitter 302 through the positive-negative cemented lens, and the transmittance/reflectance of the planar beam splitter 302 is preferably 5:5, the light is incident on the inner surface of the lens 303 after being reflected by the plane beam splitter 302, the inner surface of the lens 303 forms a concave beam splitter, the transmittance and the reflectance of which are preferably greater than 1, and the light is transmitted from the plane beam splitter 302 into human eyes after being reflected by the concave beam splitter 303. After the light reaches the human eyes, defocusing imaging is carried out at the center of the visual field of the human eyes.

Table 3 is a parameter of the optical lens in the third embodiment, in which the standard of the tilt angle is that the vertical direction is 0 ° as illustrated, the clockwise rotation angle is negative, and the counterclockwise rotation angle is positive.

Table 3 parameters of each optical lens in the third embodiment

Through the system, a user is stimulated by the defocusing position of the center of the picture when normally observing the external environment so as to correct myopia, and the functional purpose of myopia protection of the system is realized.

Although the present application discloses a combination of a structure in which one defocus unit and a plurality of defocus units are provided on the inner surface of a lens, the effect of defocus stimulation is significantly different depending on the positions of defocus images. Compared with the mode of center defocusing, the stimulation mode of peripheral defocusing only carries out clear perspective imaging in the center area of the visual field of human eyes, and is certainly a design mode with better experience from the normal use effect. However, this does not mean that the central defocus stimulus is of no use, and studies have shown that both the central and peripheral retinas contribute to the growth process of the eye, and that by the central defocus stimulus, an effect of suppressing myopia progression can be obtained based on an image formed in front of the retina while visually recognizing an image of an object.

In summary, the defocused display glasses provided by the utility model comprise at least one defocusing unit arranged on the inner side of the lens, and the defocusing unit is used for forming a defocused image in the center or the periphery of a visual field while viewing an environmental image, so as to realize defocusing stimulation and achieve the purpose of preventing myopia. The defocused display glasses are used for superposing the defocused image on the environment image in an augmented reality mode, have no influence on the environment image in the perspective direction, do not influence the normal eyes of a user, and have a large visual field range. In addition, in the defocusing display glasses, the defocusing units achieve the purpose of reducing the volume through the folded reflection and refraction structure, and the independent defocusing optical path systems share the concave reflection optical element of the lens, so that the defocusing units are accommodated in the same optical system, and the defocusing display glasses are small in volume and high in integration level.

The out-of-focus display glasses provided by the utility model are described in detail above. Any obvious modifications to the present utility model, without departing from the spirit thereof, would constitute an infringement of the patent rights of the utility model and would take on corresponding legal liabilities.

Claims

1. An out-of-focus display glasses, comprising:

at least one defocus unit disposed opposite an inner surface of the lens;

the defocusing unit comprises an image source and a spectroscope; the image source is used for providing light for the spectroscope, part of the light is reflected to the inner surface of the lens by the surface of the spectroscope facing the lens, the inner surface of the lens reflects the received light to an exit pupil position according to preset inverse transmittance, and the light is in a converging state at the exit pupil position and is subjected to defocusing imaging in human eyes positioned at one side of the exit pupil position far away from the lens.

2. The out-of-focus display glasses of claim 1 wherein:

the number of the defocusing units is one, and the spectroscope is arranged in the normal direction of the center of the lens relative to the inner surface of the lens.

3. The out-of-focus display glasses of claim 1 wherein:

the number of the defocusing units is multiple, and the defocusing units are uniformly distributed on the circumference of the lens relative to the center of the lens, or are symmetrically distributed by taking a horizontal line or a vertical line passing through the center of the lens as a symmetrical axis.

4. The out-of-focus display glasses of claim 3 wherein:

the surface of the spectroscope facing the lens faces the center of the lens for splitting light rays emitted from the image source and passing over the center of the lens.

5. The out-of-focus display glasses of claim 3 wherein:

the surface of the spectroscope facing the lens faces the periphery of the lens, and is used for splitting light rays which are emitted from the image source and do not reach the center of the lens.

6. The out-of-focus display glasses of claim 3 wherein:

the number of the defocusing units is an odd number of not less than 3.

7. The out-of-focus display glasses according to any one of claims 1-5, wherein:

the defocus unit further comprises a lens set disposed proximate to the image source.

8. The out-of-focus display glasses according to any one of claims 1-5, wherein:

the spectroscope is a plane spectroscope or a concave spectroscope concave to the lens.

9. The out-of-focus display glasses according to any one of claims 1-5, wherein:

the image source is a display screen or a light source with a mask.

10. The out-of-focus display glasses according to any one of claims 1-5, wherein:

the lens further includes an outer surface, the inner surface and the outer surface having a surface profile difference to produce an optical power adapted to human eye vision.