CN215986716U - Detachable augmented reality display equipment - Google Patents

Abstract

The utility model provides a detachable augmented reality display device, which comprises an adaptive eye diopter adjusting system and an augmented reality display system, wherein: the self-adaptive eye diopter adjusting system comprises a liquid lens, a sensor and a driving system; the augmented reality display system comprises a display source, a liquid lens, a semi-transparent reflective lens and a semi-transparent reflective spherical mirror. The structure can support independent eye adaptive adjustment, and does not increase extra circuit control cost and space.

Description

Detachable augmented reality display equipment

Technical Field

The present invention relates to a display device.

Background

Augmented Reality (AR) is a technology that combines the real world with virtual display, and can superimpose virtual information on the real world, and is widely used in various industries. At present, when the head-mounted display equipment for augmented reality displays images, monocular display can only perform two-dimensional display, and the images with certain parallax need to be displayed through binocular during stereo display, but the implementation mode of the stereo display can cause binocular convergence conflict of human eyes, and discomfort such as dizziness is easily caused after the head-mounted display equipment is worn for a long time. Although liquid lenses are used to achieve stereoscopic display, the addition of liquid lenses has been proposed to achieve diopter adjustment of the wearer, since the diopters of the wearer for near and far vision do not match perfectly. Therefore, the whole system is divided into two parts, namely an augmented reality display part and an adaptive diopter adjustment part. When the augmented reality is not needed, the optical device can be disassembled to achieve the effect of the refraction adjustment of the user. The utility model has the advantages of can carry out the stack matching when needing augmented reality and use, because carry out refraction adjustment earlier, so do not influence whole use, thereby the molding when diopter is adjusted just can design according to relevant needs and realize pleasing to the eye effect, in addition because two systems all use liquid lens, the circuit part can be public, can reduce use cost and usage space.

In the above prior art, the user needs to consider the diopter adjustment of the human eye. In addition, when the device is not used, whether the device is lighter and more beautiful and can provide functions, such as diopter self-adaptive adjustment. In addition, different systems for realizing the multi-focus enhanced display need to use an independent adjusting control circuit scheme.

The prior art has the display effect of augmented reality, but the diopter adjustment of human eyes is not considered in the system. Or just diopter adjustment, and not combining the two to enhance the effect. In addition, for a user, the detachable system only can adjust diopter independently, and the practicability of the user in daily use can also be guaranteed.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides a detachable augmented reality display device, which includes an adaptive eye diopter adjustment system and an augmented reality display system, wherein: the self-adaptive eye diopter adjusting system comprises a liquid lens, a sensor and a driving system; the augmented reality display system comprises a display source, a liquid lens, a semi-transparent reflective lens and a semi-transparent reflective spherical mirror.

The sensor can read diopter data of human eyes and transmit the diopter data to the driving system, and the driving system can adjust the voltage of the liquid lens.

The lens is a combination of one lens or a plurality of lens components.

Wherein, the display source is an OLED or an LCD.

The display source passes through the lens, then passes through the spectroscope, then enters the human eyes through the semi-transparent semi-reflective lens, and also can directly pass through the lens and then directly enters the human eyes through the semi-transparent semi-reflective lens.

The liquid lens comprises two immiscible liquids with different refractive indexes, one is a conductive aqueous solution, the other is a non-conductive silicone oil solution, and the two liquids are packaged in a cylindrical container with transparent two surfaces.

Wherein, the container wall of the liquid lens is subjected to hydrophobic treatment.

Wherein, the relation between the lens focal length f and the voltage of the liquid lens is as follows:

wherein: a is the radius of the cylindrical stainless steel container, n1 is the refractive index of the insulating liquid, n2 is the refractive index of the conductive liquid, θ₀Is the initial contact angle, ε₀Is the absolute dielectric constant of air, epsilon_rIs the relative dielectric constant of the dielectric material, gamma₁₂The interfacial tension, e the dielectric layer thickness, and U the applied voltage.

In the scheme, a is 7.5mm, n1 is 1.3, n2 is 1.65, and theta₀＝160°， e＝1.5μm，γ₁₂＝20mN/，ε_r＝2.65。

The voltage of the liquid lens is changed to be 32V-60V, diopter is adjusted to be-5-20, the caliber is 3mm, and the focal length is 18 mm.

The utility model also provides a detachable augmented reality display system which comprises any one of the devices, wherein the two systems use the same set of driving system or an adaptive adjusting eyeglass diopter system independently.

The device also comprises a sensor and a driving system, wherein the sensor obtains parameters of the eyes to adjust the liquid lenses, and the driving system can simultaneously adjust another group of liquid lenses to display different multi-focal planes.

The realization principle is as follows:

the system is adaptive adjustment glasses containing a circuit system, and the realization principle is a lens or a lens group, wherein the lens is a liquid lens or a lens combination containing liquid. The system comprises a sensor and a driving circuit, wherein parameters of human eyes are identified through the sensor, and after the parameters are sent to the circuit, the liquid lens is subjected to curvature change through voltage regulation change so as to change the focal length of a light path, so that the self-adaptive adjustment of the diopter of the glasses is realized.

The second system is an augmented reality system, a display source enters the transflective optical component through the liquid lens or the lens group containing the liquid lens, finally reaches the transflective device to enter human eyes, a virtual image is formed in front of the sight line of the human eyes, and the external world can be seen at the same time, namely the augmented reality system. By adjusting the liquid lens, the focal length of the virtual image can be changed, so that the focal length of the augmented reality system is changed.

The structure of the utility model has one of the following advantages:

1. independent eye accommodation may be supported.

2. The extra circuit control cost and space are not increased.

Drawings

FIG. 1 is a cross-sectional view of the entire system;

FIGS. 2a and 2b are schematic diagrams of a liquid lens;

FIG. 3 is a diagram of one embodiment of a liquid lens for use in the present invention;

FIG. 4 is a diagram of an embodiment of augmented reality for use with the present invention;

FIG. 5 is a schematic diagram of an appearance framework of an adaptive modulation system of the present invention;

FIG. 6 is a schematic diagram of an appearance frame of the system two augmented reality system according to the present invention

Fig. 7 is a schematic diagram of an appearance framework of the merging system according to the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.

As shown in fig. 1, the entire system is divided into two parts, the first system part being composed of alens 100 and aliquid lens 101. Wherein thelens 100 can be represented as a lens or a plurality of lens components, 101 is a liquid lens, the front-back relation position distance and the like are as required (thenormal lens 100 and the liquid lens are within 18mm of the human eye). The effect that the curvature change of theliquid lens 101 is performed according to the data of the sensor can be achieved, and the image point of what is seen falls on the image focus of the eye film data due to the change of the liquid lens. Thereby realizing the adjustment of the adaptive diopter. The second system portion is an enhanced display system portion. The display source 102 (which may be various display sources such as an OLED or an LCD) is used as an object space of an imaging system, and after passing through a liquid lens 104 (the distance between a general lens or a lens group is controlled to be 15mm from the OLED) through a lens or alens group 103, the light enters a semi-transmitting and semi-transmitting spectroscope 105 (the light enters thelens group 103 or the liquid lens 104(10-15mm), the spectroscope is arranged at an inclination angle of generally 45 °) along a vertical direction, and after entering an optically curved semi-reflecting mirror 106 (along a visual field direction by 5-10mm), the light is reflected and transmitted through thespectroscope 105, and after passing through a system part 1, a virtual image seen by human eyes is formed. By adjusting theliquid lens 104, the focal length of the system as a whole will be changed. The virtual image distance seen by the human eye will vary. The curved-surface optical half-mirror 106 can be disposed at the rightmost side of the system, or at the bottom.

Theliquid lenses 101 and 104 change the focal length by changing the curvature of the liquid using the liquid as a lens. The more mature liquid lenses are variable focus optical lenses that utilize the principle of electrowetting on dielectric (EWOD). It can change the shape of the drop by an applied voltage, and thus its focal length. Fig. 2a and 2b are schematic diagrams thereof.

Referring to fig. 2a and 2b, two liquids with different refractive indices and no mixing are packaged in a cylindrical container with transparent two sides, one is a conductiveaqueous solution 201 and the other is a non-conductivesilicone oil solution 202.

The wall of the container is treated with hydrophobic property, so that the aqueous solution will gather in the central part of the container in a dome shape, and a convex curved surface will be formed between theaqueous solution 201 and thesilicone oil 202. Focusing can be performed by changing the shape of the curved surface.

The specific implementation scheme is as follows: reference may be made in particular to fig. 3.

301 is a light-transmitting glass for sealing and is required to be light-transmitting. 100 nanometer Teflon 304(teflon), the upper layer liquid issilicon oil 305, the lower layer liquid is electrolytesalt solution 306, the refractive index of the silicon oil is 1.65, the refractive index of the electrolyte is 1.3, the stainless steel hollow round tube is placed in the stainless steelhollow round tube 302, the diameter of the whole cavity is 15mm, the height is 40mm, 1.5 micron-thick parylene 303(parylene C) and 100 nanometer Teflon 304(teflon) are plated in the stainless steel hollow round tube in sequence, a thin copper wire is adhered to the outer side of thewall surface 302 and is used as an access electrode with anITO substrate 307, and electrification is carried out. The schematic structure is shown in figure 3,

the relationship between the focal length f of the lens and the voltage is as follows:

wherein: a is the radius of the cylindrical stainless steel container, n1 is the refractive index of the insulating liquid, n2 is the refractive index of the conductive liquid, θ₀Is the initial contact angle, ε₀Is the absolute dielectric constant of air, epsilon_rIs the relative dielectric constant of the dielectric material, gamma₁₂The interfacial tension, e the dielectric layer thickness, and U the applied voltage.

In the scheme, a is 7.5mm, n1 is 1.3, n2 is 1.65, and theta₀＝160°， e＝1.5μm，γ₁₂＝20mN/，ε_r＝2.65.

From the calculation results, it was found that as the voltage was increased (U < 50V), the focal length of the lens was decreased from-22.83 mm to- ∞, and the operating voltage was 50V, at which time the bi-liquid interface shape was planar and the corresponding optical angle was zero, and when the voltage was greater than 50V and reached 80V, the liquid lens gradually decreased from + ∞to 33.47mm.

Embodiment reference scheme of system two:

referring to fig. 4, the system is divided into four main core devices, which are adisplay module 401, aliquid lens 402, a half-mirror 403, and aspherical reflector 404.

Formula for the distance from the human eye to the virtual image:

where point o is the center of curvature ofspherical mirror 404 and Δ is the distance between 0 and the optical center ofliquid lens 402.

u is the distance between thecenter 401 of the display module and the optical center of theliquid lens 402.

Is the optical power output during zooming. The calculation method is

t is a liquid lens402 the distance between the optical centers of the two when adjusted,

is the output optical power before it is not adjusted,

is the lens after conditioning.

In the experiment, a liquid lens 402 (model: Arctic 320) is adopted, the voltage is changed to 32V-60V, the diopter is adjusted to-5-20, the caliber is 3mm, and the focal length is 18mm in the default state. Thedisplay module 401 uses 0.59 inch, and after the power-on test, the voltage is between 38V and 49V, the diopter changes from 0 to 10.5, namely, the diopter changes from flat to convex, and the whole d also changes from 16cm to 100 cm.

An appearance frame schematic diagram of the system-self-adaptive adjusting system

Diopter data of human eyes are read through thesensor 502, then the data are transmitted to thedriving system 503, and thedriving system 503 adjusts the voltage of theliquid lens 501, so that the picture seen by a person is clear and is as same as that of a myopic person wearing myopic glasses and that of a presbyopic person wearing presbyopic glasses.

Fig. 6 is a schematic diagram of an appearance frame of an augmented reality system according to the second embodiment of the present invention, in which when the augmented reality display system is used, image light generated by adisplay source 601 through a lens group is refracted by a lens unit and then enters aliquid lens 602. After the image light is incident on thetransflective member 603, some of the light is reflected back to thetransflective member 603 and some of the light is transmitted out of thetransflective member 603.

Fig. 7 is a schematic diagram of an appearance framework of the adaptive adjustment system of the system i and the system ii of the present invention after being combined with the augmented reality system. Diopter data of human eyes are read through asensor 702, then the data are transmitted to adriving system 703, thedriving system 703 adjusts the voltage of theliquid lens 701, and image light generated by adisplay source 704 through a lens group is refracted by a lens unit and then enters theliquid lens 705. After image light enters thetransflective component 703, part of the light is reflected to thetransflective component 706, and then reflected to the transflective component 707 by the transflective component, at this time, part of the light is transmitted out of the transflective component 707 and enters human eyes through the adjustedliquid lens 701, and thedriving system 703 adjusts theliquid lens 705 according to the requirement of display content to realize displaying virtual images with different focal lengths.

The foregoing is illustrative of one or more embodiments provided in connection with the detailed description and is not intended to limit the practice of the utility model to the particular forms disclosed. Similar or identical methods, structures and the like as those of the present invention or several technical deductions or substitutions made on the premise of the conception of the present invention should be considered as the protection scope of the present invention.

Claims (9)

1. A detachable augmented reality display device, comprising an adaptive eye diopter adjustment system and an augmented reality display system, wherein:

the self-adaptive eye diopter adjusting system comprises a liquid lens, a sensor and a driving system;

the augmented reality display system comprises a display source, a liquid lens, a semi-transparent reflective lens and a semi-transparent reflective spherical mirror.

2. The display device of claim 1, wherein: the sensor can read diopter data of human eyes and transmit the diopter data to the driving system, and the driving system can adjust the voltage of the liquid lens.

3. The display device of claim 1, wherein: the lens is a lens or a combination of a plurality of lens components.

4. The display device of claim 1, wherein: the display source is an OLED or an LCD.

5. The display device of claim 1, wherein: the display source passes through the lens, then passes through the spectroscope, then enters human eyes through the semi-transparent semi-reflective lens, and also can directly pass through the lens and then directly enters human eyes through the semi-transparent semi-reflective lens.

6. The display device of claim 1, wherein: the liquid lens comprises two liquids which have different refractive indexes and are not mixed, wherein one liquid is a conductive aqueous solution, the other liquid is a non-conductive silicone oil solution, and the two liquids are packaged in a cylindrical container with transparent two surfaces.

7. The display device of claim 1, wherein: the walls of the container of the liquid lens are hydrophobic treated.

8. The display device of claim 1, wherein: the relation between the lens focal length f and the voltage of the liquid lens is as follows:

wherein: a is the radius of the cylindrical stainless steel container, n1 is the refractive index of the insulating liquid, n2 is the refractive index of the conductive liquid, θ₀Is the initial contact angle, ε₀Is the absolute dielectric constant of air, epsilon_rIs the relative dielectric constant of the dielectric material, gamma₁₂Is interfacial tension, e is dielectric layer thickness, U is applied voltage value,

in the scheme, a is 7.5mm, n1 is 1.3, n2 is 1.65, and theta₀＝160°，e＝1.5μm，γ₁₂＝20mN/，ε_r＝2.65。

9. The display device of claim 1, wherein: the voltage of the liquid lens is changed into 32V-60V, the diopter is adjusted to be-5-20, the caliber is 3mm, and the focal length is 18 mm.

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