KR20200063589A - Multiple Focus Optical System and Head Mounted Display Using Thereof - Google Patents

Abstract

Disclosed are a multifocal optical system and a head-mount display using the same. According to one aspect of the present embodiment, provided is the optical system capable of stably generating a multifocal image without changing the size. A multifocal optical device includes a first image output unit, a second image output unit, a first lens unit, a second lens unit, a first light splitter, a light reflection unit, and a second light splitter.

Description

Multi Focus Optical System and Head Mounted Display Using Thereof

The present invention relates to a multi-focus optical system and a head mounted display using the same.

The contents described in this section merely provide background information for this embodiment, and do not constitute a prior art.

A 3D image display device such as a head mounted display device includes a multifocal optical system for generating a 3D image. A multifocal optical system is a device that outputs an image with a different focus, and a conventional multifocal optical system changes a distance from an image output device to an optical system in order to generate an image with a different focus. That is, one image output device outputs light where a virtual image is formed at a predetermined position, and the other image output device mirrors another image to be imaged at a different viewing distance in order to change the distance to the optical system. The light was output using an additional configuration such as.

However, when it is desired to change the imaging distance between a plurality of generated images, since the conventional optical system adjusts the distance from the image output device to the optical system, there is a configuration problem due to a change in the position of the image output device. When the position of the image output device is changed, the size of the multifocal optical system including the image output device may be changed, which includes a problem that the apparatus needs to be redesigned.

One embodiment of the present invention has an object to provide an optical system capable of stably generating and providing a multifocal image without changing the size.

According to an aspect of the present invention, in an optical device forming a multi-focus image, a first image output unit outputting light information corresponding to a first virtual image and a second image outputting light information corresponding to a second virtual image A first lens unit for refracting light information output from the output unit and the first image output unit, and a second lens unit having different characteristics from the first lens unit and refracting light information output by the second image output unit; The first optical distributor that matches the path of the light information passing through the first lens unit and the second lens unit, and the light reflecting unit for reflecting light information passing through the first optical distributor and the reflection from the light reflecting unit It provides a multi-focus optical device, characterized in that it comprises a second optical splitter that allows the optical information to form a focal point.

According to an aspect of the present invention, the first light distributor, the light reflection unit and the second light distributor are characterized in that implemented in the housing of the optical device.

According to an aspect of the present invention, the housing of the optical device is implemented as an integral type including both the first light splitter, the light reflector and the second light splitter, or the first light splitter, the light reflector and It is characterized in that it is implemented as a separate type each including only a part of the second optical distributor.

According to an aspect of the present invention, the first lens unit or the second lens unit is a first or third lens disposed on a traveling path of light output from each lens unit and a housing of an optical device adjacent to the first lens And a second or fourth lens disposed on the surface.

According to one aspect of the invention, the housing of the optical device is characterized in that it has a predetermined curvature on one surface adjacent to the first lens.

According to one aspect of the invention, the second lens unit is characterized in that the path of the light information refracted is different from the path of the light refracted by the first lens unit.

According to an aspect of the present invention, the light reflection unit is characterized in that each light information passing through the first light distributor on one side of the multi-focus optical device can form one focus.

According to an aspect of the present invention, the multi-focus optical device is characterized in that it is possible to view the multi-focus image even in a single eye.

According to an aspect of the present invention, the multi-focus optical device is characterized in that it is possible to view the multi-focus image in both eyes.

According to an aspect of the present invention, in an optical device forming a multi-focus image, a first image output unit outputting light corresponding to an image, a second image output unit outputting light corresponding to the image, and the first 1 A first lens unit for refracting the light output from the image output unit, a second lens unit for refracting the light output by the second image output unit, and light passing through any one of the first lens unit and the second lens unit And a first optical distributor for reflecting silver and passing light through the other, and a mirror unit for reflecting light passing through the first optical distributor or reflected from the first optical distributor. Provides

According to an aspect of the present invention, a multi-focus optical device, an image input unit for receiving an image to be output by the multi-focus optical device, and a display unit for displaying a multi-focus image generated by the multi-focus optical device, and each component are operated. It provides a head mounted display device comprising a power supply for supplying power to enable and a control unit for controlling the operation of each configuration.

According to an aspect of the present invention, a process of outputting a first image and a second image, a process of the output first image experiencing a first refractive index, and a process of the output second image experiencing a second refractive index and the second And displaying the first image that has undergone 1 refractive index and the second image that has experienced the second refractive index as one image, wherein the first image and the second image are the same image, and the first and second refractive indices are the same. Provides an image display method characterized by having different refractive indices.

As described above, according to an aspect of the present invention, there is an advantage in that a multi-focus image can be stably generated and provided without changing the size of the device.

1 is a view showing an embodiment of a head mounted display device according to an embodiment of the present invention.
2 is a configuration diagram of a head mounted display device according to an embodiment of the present invention.
3 is a configuration diagram of an optical system according to a first embodiment of the present invention.
4 is a configuration diagram of an optical system according to a second embodiment of the present invention.
5 is a configuration diagram of an optical system according to a third embodiment of the present invention.
6 is a configuration diagram of an optical system according to a fourth embodiment of the present invention.
7 is a configuration diagram of an optical system according to a fifth embodiment of the present invention.
8 is a configuration diagram of an optical system according to a sixth embodiment of the present invention.
9 is a configuration diagram of an optical system according to a seventh embodiment of the present invention.
10 is a configuration diagram of an optical system according to an eighth embodiment of the present invention.
11 is a flowchart illustrating a method of displaying an image by a head mounted display device according to an embodiment of the present invention.

The present invention can be applied to various changes and may have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals are used for similar components.

Terms such as first, second, A, and B may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from other components. For example, the first component may be referred to as a second component without departing from the scope of the present invention, and similarly, the second component may be referred to as a first component. The term and/or includes a combination of a plurality of related described items or any one of a plurality of related described items.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but there may be other components in between. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

Terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. It should be understood that terms such as “include” or “have” in the present application do not preclude the existence or addition possibility of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification. .

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains.

Terms, such as those defined in a commonly used dictionary, should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

1 is a view showing an embodiment of a head mounted display device according to an embodiment of the present invention, and FIG. 2 is a configuration diagram of a head mounted display device according to an embodiment of the present invention.

1 and 2, the head mounted display device 100 according to an embodiment of the present invention includes an image input unit 210, an image output unit 220, an optical system 230, a control unit 240, and a power unit ( 250).

The image input unit 210 receives an image to be displayed from the outside. The image input unit 210 is implemented as a communication unit capable of performing wired or wireless communication, and can receive an image from an external device using wired or wireless communication. Alternatively, the image input unit 210 may be implemented as a physical connection means, such as a USB terminal, to receive an image from an external device using a physical connection means.

The image output unit 220 outputs the input image. The image output unit 220 outputs light corresponding to the input image, so that the user of the head mounted display device 100 can check the image using the display unit.

The image output unit 220 may be implemented in any configuration as long as it is disposed in the head mounted display device and outputs an input image (light corresponding to). For example, the image output unit 220 may be implemented in a configuration capable of outputting an input image (optical information corresponding to it) while being implemented with a small size, such as a microdisplay.

The optical system 230 receives the light information output from the image output unit 220 to generate a plurality of virtual images having different imaging distances. A detailed description of the optical system 230 will be described with reference to FIGS. 3 to 10.

The control unit 240 controls the operation of each component 210, 220 and 260. The control unit 240 may receive an operation control signal (eg, on or off of the head mounted display device) of each configuration from a user of the head mounted display device 100, and accordingly, configure each configuration to operate. Can be controlled.

The power supply unit 250 provides power to allow each of the components 210, 220, and 240 to operate in each of the components 210, 220, and 240.

The head mounted display device 100 is a device that generates augmented reality (AR: Augmented Reality) image or mixed reality (MR) image and provides it to a user, and includes a plurality of image output units 220 and an optical system 230 Use to allow the user to view 3D images in both binocular as well as monocular. Since the head mounted display apparatus 100 generates a plurality of virtual images having different imaging distances using the plurality of image output units 220 and the optical system, it is possible to view 3D images with a single eye.

3 is a configuration diagram of an optical system according to a first embodiment of the present invention.

Referring to FIG. 3, the optical system 230 according to the first embodiment of the present invention includes a first housing 310 and a second housing 370, and includes a first lens unit 320 and a second lens unit ( 330, a first light splitter 340, a second light splitter 350, and a light reflector 360. The first lens unit 320, the second lens unit 330, the first light splitter 340, the second light splitter 350 and the light reflector 360 are made of a material through which light can pass.

The first housing 310 receives and merges light information output from the image output units 220 and 225 and transmits the merged information to the second housing 370. The first housing 310 includes a first lens unit 320, a second lens unit 330, and a first light splitter 340. However, the configuration included in the first housing 310 may vary depending on the case.

The second housing 370 is combined with the optical information in the real space by using the optical information received from the first housing 310. The second housing includes a second light distributor 350 and a light reflector 360. Likewise, the configuration included in the second housing 370 may vary depending on the case.

The first lens unit 320 is disposed on the optical axis progress path of the optical information output from the image output unit 220, receives the optical information corresponding to the image from the image output unit 220, and the received light beam (here , Light rays mean light information). The first lens unit 320 refracts the light beams so that the light beams reflected from the light reflector 360 gather at a preset focus 380 so that an observer can observe the first virtual image 390 disposed at an arbitrary distance. Order.

The first lens unit 320 includes a first lens 324 and a second lens 328.

The first lens 324 allows light received from the image output unit 220 to have directivity. The first lens 324 may be implemented as a collimator, and may form light received from the image output unit 220 similar to parallel light. In this way, the first lens 324 is disposed on the path of the traveling light output from the image output unit 220 (-z-axis direction), so that the light output from the image output unit 220 is completely the first housing 310 ). When the first lens 324 is not disposed, since the image output unit 220 outputs light in the -yz plane without directionality, light may be irradiated to the outside of the interface between the first housing 310 and the outside. When the light is irradiated to the outside of the first housing 310, the light incident on the interface of the first housing 310 can form or form a double image by traveling or reflecting in a path different from the design in the optical system 230, thereby accurately Images may not be delivered to the observer. In addition, when light is irradiated to the outside of the first housing 310, the amount of light incident to the first housing 310 decreases, resulting in a problem that the light efficiency decreases. In order to solve this problem, the optical system 230 solves the above-described problem by arranging the first lens 324 on the path of the traveling light output from the image output unit 220.

The second lens 328 is disposed on one surface of the first housing 310 to disperse the light passing through the first lens 324. The second lens 328 is to disperse the light passing through the first lens 324, one surface of the first housing 310, in particular, one surface of the first housing 310 adjacent to the first lens 324 To (+ one end on z-axis). The second lens 328 may be embodied as a concave lens and disperse the light passing through the first lens 324. Accordingly, light passing through the second lens 328 is reflected by the reflector 360 later, so that the light can be formed entirely. The curvature of the first lens 324 and the curvature of the second lens 328 change the depth of the multifocal point to be formed together with the light reflector 360. Therefore, the curvature of the first lens 324 and the curvature of the second lens 328 are respectively set according to the depth of the multifocal to be formed.

The second lens unit 330 is disposed on the optical axis progress path of the optical information output from the image output unit 225, receives optical information corresponding to the image from the image output unit 225, and refracts the received light beam Order. Like the first lens unit 320, the second lens unit 330 refracts light rays so that light rays reflected from the light reflection unit 360 may be gathered at a preset focus 380 to form an image. However, the image output unit 225 and the second lens unit 330 are disposed at different positions from the image output unit 220 and the first lens unit 320, so that light rays are directed to the first housing 310 in different directions. I am looking for a job.

The second lens unit 330 has different characteristics from the first lens unit 320. For example, the second lens unit 330 may have a different depth of field from the first lens unit 320 or a different angle of view, thereby reducing the distance or angle of light information passing through the second lens unit 330. 1 to be different from that of the lens unit 320. Since the second lens unit 330 is disposed on the optical axis progress path of the optical information output from the image output unit 225, the image output unit 225 may receive a first light splitter 340 from the image output unit 220. ). That is, as in the prior art, the image output unit 225 does not need to be arranged with a difference in distance from the image output unit 220, but the second lens unit is disposed at a different location on the same distance as the image output unit 220 By adjusting the characteristics of 330, a second virtual image having a different imaging distance from the first virtual image generated by the image output unit 220 may be generated. By disposing the second lens unit 330, the image output unit 225 can be disposed at a short distance from the first housing 310, thereby reducing the overall size of the optical system 230 and changing the imaging distance of the virtual image. Although it is not necessary to change the position of the image output unit 225, the optical system 230 can stably generate a multi-focus image with a fixed size.

The image output unit 225 and the second lens unit 330 may be disposed in a direction in which light rays passing through the second lens unit 330 can be reflected by the first light distributor 340. Referring to FIG. 3, in order for light rays passing through the second lens unit 330 to be reflected by the first optical distributor 340, the image output unit 225 and the second lens unit 330 are first optical distributors. It may be arranged in the -y axis direction based on (340). Accordingly, the light output from the image output unit 220 and passing through the first lens unit 320 and the light output from the image output unit 225 and passing through the second lens unit 330 are the first light splitter 340. By proceeding in the same direction, the same focal point 380 may be formed, but a plurality of virtual images 390 and 395 may be generated at different distances.

The second lens unit 330 includes a third lens 334 and a fourth lens 338.

The third lens 334 is similar to the first lens 324, so that the light received from the image output unit 220 has directivity. However, the third lens 334 may have different characteristics from the first lens 324.

The fourth lens 338 is disposed on the other surface of the first housing 310, similar to the second lens 328, to disperse the light passing through the third lens 334. Similarly, the curvature of the third lens 334 and the curvature of the fourth lens 338 are respectively set according to the depth of the multifocal to be formed.

The first light splitter 340 passes light rays passing through the first lens unit 320 and reflects light rays passing through the second lens unit 330. When the second lens unit 330 is disposed in the -y-axis direction with respect to the first optical splitter 340, the first optical splitter 340 is disposed at about 135° based on the y-axis. Accordingly, the light beam passing through the first lens unit 320 and incident in the -z axis direction passes through the first optical splitter 340, and passes through the second lens unit 330 to the first optical splitter 340. With reference to the light incident on the +y axis direction passes through the first light distributor 340 and proceeds in the -z axis direction. Accordingly, the two light rays incident on the first light splitter 340 from different directions travel in the same direction by the first light splitter 340.

The second light splitter 350 passes the light beam that has passed through the first light splitter 340, and reflects the light beam reflected from the light reflector 360 again. The second light splitter 350 is disposed in the same direction as the first light splitter 340 (about 135° relative to the y-axis), thereby reflecting the light reflected from the light reflector 360 in the -y-axis direction. The light information output from each of the image output units 220 and 225 forms one focus 380. However, since each optical information passes through different lens units 320 and 330, two virtual images 390 and 395 having different imaging distances are formed. Accordingly, the user can watch two virtual images 390 and 395 having different imaging distances even with a single eye, so that 3D images can be viewed while minimizing eye fatigue.

The light reflector 360 reflects light information that has passed through the second light splitter 350. The light reflector 360 re-reflects the light beam passing through the second light splitter 350 in the direction of the second light splitter 350 (+z-axis direction), so that each light information is on one side of the optical system 230. It is possible to form the focus 380 of the. The light reflection unit 360 may be implemented with any configuration having a reflective surface such as a lens or a mirror. The light reflector 360 may have a constant curvature and allow light scattered by the lens units 320 and 330 to be reflected at a preset focus.

In FIG. 3, the image output units 220 and 225 and the lens units 220 and 230 are illustrated in the optical system 230, but the present invention is not limited thereto. An additional lens unit (not shown) having the same or different curvature as the additional image output unit and the second lens unit 330 may be additionally disposed in the optical system 230. An additional image output unit (not shown) at positions symmetric to the image output unit 225 and the second lens unit 230 based on the first lens unit 320 (+y-axis direction from the first lens unit 320) ) And an additional lens unit (not shown) may be disposed. Accordingly, additional virtual images may be further formed on the virtual images 390 and 395 formed by the image output units 220 and 225 and the optical system 230. In this case, a more vivid 3D image may be provided to the user. When an additional image output unit and an additional lens unit are disposed in the optical system 230, an additional light distributor (not shown) in the first housing 310 may be disposed. Since the first light splitter 340 passes the light rays incident in the -z-axis direction and the -y-axis direction, when there is no additional light splitter, light incident through the additional lens unit is reflected in the -z-axis direction Cannot be. Accordingly, in order to reflect light incident through the additional lens unit in the -z-axis direction, an additional light splitter (not shown) may be disposed at about 45° based on the y-axis.

4 is a configuration diagram of an optical system according to a second embodiment of the present invention.

The optical system 230 according to the second embodiment of the present invention has the same configuration as the optical system 230 according to the first embodiment, and the second beam splitter 350 is different from the optical system 230 according to the first embodiment. In the direction.

The second light splitter 350 is disposed at about 45° based on the y-axis, so that the light reflected from the light reflector 360 is reflected in the +y-axis direction. Accordingly, the optical system 230 forms the same focus 380 on the right side (+y-axis direction) based on the optical system, but the plurality of virtual images 390 and 395 having different imaging distances on the left side (-y-axis direction) are formed. To create.

5 is a configuration diagram of an optical system according to a third embodiment of the present invention, and FIG. 6 is a configuration diagram of an optical system according to a fourth embodiment of the present invention.

Unlike the optical system 230 according to the first or second embodiment, the optical system 230 according to the third and fourth embodiments of the present invention does not include the light reflection unit 360. However, the second light splitter 350 completely reflects the light passing through the first light splitter 340 without passing it. That is, the second light splitter 350 included in the optical system 230 according to the third and fourth embodiments of the present invention completely reflects incident light as if it were a mirror. Accordingly, the optical system 230 according to the third embodiment shown in FIG. 5 forms the same focus 380 on the right side (+y-axis direction), but a plurality of different imaging distances on the left side (-y-axis direction) Generating virtual images 390 and 395, the optical system 230 according to the fourth embodiment shown in FIG. 6 forms the same focus 380 on the left side (-y-axis direction), but on the right side (+y-axis direction) To generate a plurality of virtual images (390, 395) having a different imaging distance.

7 is a configuration diagram of an optical system according to a fifth embodiment of the present invention, FIG. 8 is a configuration diagram of an optical system according to a sixth embodiment of the present invention, and FIG. 9 is an optical system according to a seventh embodiment of the present invention 10 is a configuration diagram of an optical system according to an eighth embodiment of the present invention.

In the optical system according to the fifth to eighth embodiments of the present invention, the first housing and the second housing may be integrally implemented.

As described with reference to FIGS. 3 to 6, the optical system 230 according to the first to fourth embodiments of the present invention includes a first housing including the lens units 320 and 330 and the first light distributor 340. The housing may be implemented by separating the housing into a second housing 370 including the 310 and the second light splitter 350 or the second light splitter 350 and the light reflector 360. However, when implemented in this way, there is a fear that the interface 345 of the housing is generated, so that the light efficiency is slightly lowered. Accordingly, as illustrated in FIGS. 7 to 10, the housing 710 is formed integrally without separating it into the first housing and the second housing, thereby reducing the interface to increase light efficiency.

11 is a flowchart illustrating a method of displaying an image by a head mounted display device according to an embodiment of the present invention.

The head mounted display device 100 outputs light information corresponding to the first virtual image and light information corresponding to the second virtual image (S1110).

Light information corresponding to the first virtual image passes through the first lens unit 320 (S1120). Light information corresponding to the first virtual image passes through the first lens unit 320 and experiences a first refractive power.

The light information corresponding to the second virtual image passes through the second lens unit 330 (S1130). The light information corresponding to the second virtual image passes through the second lens unit 320 and experiences a second refractive power.

The head mounted display device 100 displays light information that has undergone the first refractive power and light information that has experienced the second refractive power as one image (S1140 ).

Although FIG. 11 describes that each process is executed sequentially, this is merely illustrative of the technical idea of an embodiment of the present invention. In other words, a person having ordinary knowledge in the technical field to which one embodiment of the present invention belongs may execute or change one or more of each process by changing the order described in FIG. 11 without departing from the essential characteristics of one embodiment of the present invention. Since it will be applicable to various modifications and variations by executing in parallel, FIG. 11 is not limited to the time series order.

Meanwhile, the processes illustrated in FIG. 11 may be implemented as computer-readable codes on a computer-readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data readable by a computer system is stored. That is, the computer-readable recording medium includes magnetic storage media (eg, ROM, floppy disk, hard disk, etc.), optical reading media (eg, CD-ROM, DVD, etc.) and carrier waves (eg, the Internet). Storage). In addition, the computer-readable recording medium can be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

The above description is merely illustrative of the technical idea of the present embodiment, and those skilled in the art to which this embodiment belongs may be capable of various modifications and variations without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical spirit of the present embodiment, but to explain, and the scope of the technical spirit of the present embodiment is not limited by these embodiments. The protection scope of the present embodiment should be interpreted by the claims below, and all technical spirits within the equivalent range should be interpreted as being included in the scope of the present embodiment.

100: head mounted display device
210: video input
220: video output
230: optical system
240: display unit
250: control unit
260: power supply
310, 370, 710: housing
320, 330: lens unit
324, 328, 334, 338: lens
340, 350: optical splitter
360: light reflector
380, 385: Award

Claims (12)

In the optical device for forming a multi-focus image,
A first image output unit outputting light information corresponding to the first virtual image;
A second image output unit outputting light information corresponding to the second virtual image;
A first lens unit that refracts light information output from the first image output unit;
A second lens unit having different characteristics from the first lens unit and refracting light information output from the second image output unit;
A first optical splitter that matches a traveling path of light information passing through the first lens unit and the second lens unit;
A light reflector for reflecting light information that has passed through the first light distributor; And
A second light splitter that allows light information reflected from the light reflection unit to form a focal point
Multi-focus optical device comprising a. According to claim 1,
The first light distributor, the light reflection unit and the second light distributor,
Multi-focus optical device, characterized in that implemented in the housing of the optical device. According to claim 2,
The housing of the optical device,
The first light splitter, the light reflecting unit and the second light splitter may be integrally formed, or may be implemented as a separate type including only a portion of the first light splitter, the light reflecting unit and the second light splitter, respectively. Multi-focus optical device, characterized in that. According to claim 2,
The first lens unit or the second lens unit,
It characterized in that it comprises a first or a third lens disposed on the optical axis of the optical path passing through each lens unit and a second or fourth lens disposed on one surface of the housing of the optical device adjacent to the first lens Multifocal optics. The method of claim 4,
The housing of the optical device,
A multifocal optical device having a predetermined curvature on one surface adjacent to the first lens. According to claim 1,
The second lens unit,
A multifocal optical device characterized in that the path of the refracted light information is different from the path of light refracted by the first lens unit. According to claim 1,
The light reflection unit,
A multifocal optical device characterized in that each light information passing through the first optical distributor on one side of the multifocal optical device can form a focal point. According to claim 1,
The multi-focus optical device,
A multifocal optical device characterized in that the multifocal image can be viewed in a monocular. According to claim 1,
The multi-focus optical device,
A multifocal optical device characterized in that the multifocal image can be seen in both eyes. In the optical device for forming a multi-focus image,
A first image output unit outputting light information corresponding to the first virtual image;
A second image output unit outputting light information corresponding to the second virtual image;
A first lens unit that refracts light information output from the first image output unit;
A second lens unit having different characteristics from the first lens unit and refracting light information output from the second image output unit;
A first optical splitter that matches a traveling path of light information passing through the first lens unit and the second lens unit;
Mirror unit for reflecting light passing through the first light distributor
Multi-focus optical device comprising a. The multifocal optical device according to any one of claims 1 to 10;
An image input unit that receives an image to be output by the multi-focus optical device;
A power supply unit that supplies power to enable each component to operate; And
Control unit that controls the operation of each component
Head mounted display device comprising a. Outputting light information corresponding to the first virtual image and light information corresponding to the second virtual image;
A process in which the light information corresponding to the first virtual image experiences a first refractive power;
A process in which the light information corresponding to the second virtual image experiences a second refractive power;
And a process in which the light information that has undergone the first refractive power and the light information that has undergone the second refractive power are displayed as one image,
The image display method of claim 1, wherein the first image and the second image are arranged on the same optical axis, and the first and second refractive powers are different refractive powers.

Images