KR20210113822A - An optical device with plural pin-holes and a head mounted display apparatus using thereof - Google Patents

Abstract

The present invention relates to an optical device including pin holes and a head-mounted display device using the same. The optical device includes: a display outputting image light such that the real world and image information can be provided to a user on an optimized screen; and a mirror disposed in front of the user's eye, reflecting the image light output from the display so that a virtual image reaches the user's eye, and having holes for pin hole effect generation so that the real world can be seen through the user's field of vision. According to the present invention, the real world seen through by the holes and the image light reflected by the mirror reach the user's eye. The mirror in front of the user's eye reflects the image light output from the display so that the virtual image reaches the user's eye. The holes generate the pin hole effect on the mirror so that the real world can be seen through the user's field of vision. Accordingly, even when a dark-coated mirror is disposed in front, the real world is seen through using the pin hole effect. In addition, since the area of image light reflection is wide, a bright and clear virtual image reaches the user's eye. Also, the optical device can be simplified in structure and reduced in weight and size. Further, according to the present invention, the mirror can be easily manufactured by hole-excluded metal coating by vacuum deposition.

Description

An optical device including a plurality of pinholes and a head-worn display device using the same

The present invention relates to an optical device and a head wearable display device using the same, and more particularly, to an optical device including a plurality of pinholes and a head wearable display device using the same.

Various wearable devices are being developed according to the trend of weight reduction and miniaturization of digital devices. A head mounted display, which is a type of wearable device, refers to various devices that a user can wear on the head to receive multimedia contents. Here, the head mounted display (HMD) is worn on the user's body and provides images to the user in various environments as the user moves. Such a head mounted display (HMD) is divided into a see-through type and a see-closed type, and the transparent type is mainly used for Augmented Reality (AR), and the closed type is mainly used for virtual reality (Virtual Reality). Reality, VR).

FIG. 1 is a diagram illustrating a schematic configuration of a general glasses-type head mounted display (HMD), and FIG. 2 is a diagram illustrating a schematic configuration of a general band-type head mounted display (HMD). As shown in FIGS. 1 and 2, a general head-mounted display in the form of glasses or a band is worn on the user's face or head and is transmitted through a lens that projects augmented reality (AR) image information to the real world. will be provided to the user.

In order to implement augmented reality in such a head-mounted display, an optical device having a complex structure is used, and the existing optical device has a large size and a heavy doorknob. In addition, since the real world must be transmitted and viewed, a reflective mirror that reflects image light cannot be disposed in front, so there is a limit to the change of the structure.

On the other hand, as prior art related to the present invention, Patent Publication No. 10-2016-0032656 (title of the invention: optical device for augmented reality, publication date: March 24, 2016) and the like have been disclosed.

The present invention has been proposed to solve the above problems of the previously proposed methods, and a mirror disposed in front of the user's eye reflects the image light output from the display so that a virtual image reaches the user's eye. , by forming a plurality of holes that create a pinhole effect in the mirror so that the real world can be seen through the user's field of view, the real world is transmitted through the pinhole effect even when a darkly coated mirror is placed in front, A bright and clear virtual image is delivered to the user's eyes because the reflection area of the image light is large, and the optical device including a plurality of pinholes and a head-wearable display device using the same, which can be lightweight and miniaturized by simplifying the structure of the optical device, are provided. for that purpose

Another object of the present invention is to provide an optical device including a plurality of pinholes and a head-wearable display device using the same, which can be easily manufactured by manufacturing a mirror by metal coating except for the hole in a vacuum deposition method. do.

An optical device including a plurality of pinholes according to a feature of the present invention for achieving the above object,

An optical device comprising:

a display for outputting image light so that image information along with the real world can be provided to a user through an optimized screen; and

It is disposed in front of the user's eyes and reflects the image light output from the display so that the virtual image reaches the user's eyes, but creates a pinhole effect so that the real world can be seen through the user's field of view Including a mirror formed with a plurality of holes,

It is characterized in that the image light reflected by the mirror along with the real world transmitted through the plurality of holes reaches the user's eyes.

Preferably, the hole is

It may be a circular hole with a diameter of 0.5 mm or more and 5 mm or less.

More preferably, the hole may have a diameter of 2 mm or less.

Preferably, the mirror,

A metal coating except for the hole may be performed to reflect the image light.

More preferably, the mirror,

The metal may be coated by vacuum deposition.

Preferably, the mirror,

It may be configured as a curved surface to reflect the image light output from the display and deliver it to the user's eyes.

A head-wearable display device using an optical device including a plurality of pinholes according to a feature of the present invention for achieving the above object,

A head mounted display device comprising:

HMD frame that can be worn on the user's head; and

An optical device that provides augmented reality to a user wearing the HMD frame,

The optical device is

a display for outputting image light so that image information along with the real world can be provided to a user through an optimized screen; and

It is disposed in front of the user's eyes and reflects the image light output from the display so that the virtual image reaches the user's eyes, but creates a pinhole effect so that the real world can be seen through the user's field of view Including a mirror formed with a plurality of holes,

It is characterized in that the image light reflected by the mirror along with the real world transmitted through the plurality of holes reaches the user's eyes.

Preferably, the optical device comprises:

The HMD frame may be located in the user's left eye and/or right eye, respectively.

According to the optical device including a plurality of pinholes and the head-wearable display device using the optical device including a plurality of pinholes proposed in the present invention, a mirror disposed in front of the user's eyes reflects the image light output from the display to provide a virtual image to the user's eyes. However, by forming a plurality of holes that create a pinhole effect in the mirror so that the real world can be seen through the user's field of view, even if a darkly coated mirror is placed in front, the real world can be A bright and clear virtual image is transmitted to the user's eyes because it is transmitted and the reflection area of the image light is large, and the structure of the optical device can be simplified to reduce the weight and size.

In addition, according to the optical device including a plurality of pinholes and the head-wearable display device using the optical device including a plurality of pinholes proposed in the present invention, it can be easily manufactured by manufacturing a mirror by metal coating except for the holes in a vacuum deposition method.

1 is a view showing a schematic configuration of a general glasses-type head mounted display (HMD).
2 is a view showing a schematic configuration of a general band-type head mounted display (HMD).
3 and 4 are diagrams illustrating a perspective view of a head mounted display device using an optical device including a plurality of pinholes according to an embodiment of the present invention.
5 is a diagram illustrating a state in which real world and image light are transmitted to a user's eyes through an optical device including a plurality of pinholes according to an embodiment of the present invention;
6 is a view illustrating an optical device including a plurality of pinholes according to an embodiment of the present invention.
7 is a view showing the configuration of a head-mounted display device using an optical device including a plurality of pinholes as functional blocks according to an embodiment of the present invention.

Hereinafter, preferred embodiments will be described in detail so that those of ordinary skill in the art can easily practice the present invention with reference to the accompanying drawings. However, in describing a preferred embodiment of the present invention in detail, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions.

In addition, throughout the specification, when a part is 'connected' with another part, it is not only 'directly connected' but also 'indirectly connected' with another element interposed therebetween. include In addition, "including" a certain component means that other components may be further included, rather than excluding other components, unless otherwise stated.

3 and 4 are diagrams illustrating a perspective view of a head mounted display device 10 using an optical device 100 including a plurality of pinholes according to an embodiment of the present invention. 3 and 4 , the optical device 100 including a plurality of pinholes according to an embodiment of the present invention includes a display 110 and a mirror 120 having a plurality of holes 121 formed therein. It may be configured to include, and may be configured as a head-wearable display device 10 in the form of glasses or a band including the optical device 100 .

The display 110 may output image light so that image information along with the real world may be provided to the user through an optimized screen. The display 110 may output image information that provides various types of information to the user based on augmented reality under the control of the controller 300, which will be described later. The display 110 may be implemented using various display devices such as organic light emitting diodes (OLEDs).

In this case, the display 110 may be located on the left or right side of the mirror 120 in front of the user's eyes, as shown in FIG. 3 , but on the upper side of the mirror 120 as shown in FIG. 4 . It may be located in , and may be configured in various positions such as under the mirror 120 .

The mirror 120 is disposed in front of the user's eyes, and reflects the image light output from the display 110 so that the virtual image reaches the user's eyes, but the real world through the user's field of view A plurality of holes 121 generating a pinhole effect may be formed to be visible. That is, the mirror 120 may serve to reflect the image light output from the display 110 while the real world is transmitted through the field of view through the hole 121 .

5 is a diagram illustrating a state in which real world and image light are transmitted to a user's eyes through the optical device 100 including a plurality of pinholes according to an embodiment of the present invention. As shown in FIG. 5 , an optical device 100 including a plurality of pinholes according to an embodiment of the present invention includes a display 110 and a mirror 120 , and includes a plurality of mirrors 120 formed on the mirror 120 . The image light reflected by the mirror 120 along with the real world transmitted through the hole 121 reaches the user's eyes, so that augmented reality can be realized.

In this case, the mirror 120 may be configured as a curved surface to reflect the image light output from the display 110 and deliver it to the user's eyes. That is, as shown in FIG. 5 , the mirror 120 may have a predetermined curvature so that the image light output from the display 110 is incident and reflected in the user's eye direction, and is directed toward the user's eye. It may be configured as a concavely curved surface.

Here, the curvature of the mirror 120 may be different depending on the position of the display 110 in the head mounted display device 10 , the distance between the mirror 120 and the eye (eye relief), and the like. In addition, although the entire mirror 120 may have a predetermined curvature uniformly, the curvature of the mirror 120 may not be constant depending on the embodiment.

Meanwhile, the mirror 120 may be coated with a metal except for the hole 121 to reflect image light. More specifically, the mirror 120 may be metal coated by vacuum deposition.

When the mirror 120 is manufactured as a small pin mirror, it is very difficult to manufacture, and the process of depositing the small pin mirror in an optical system is complicated. However, in the optical device 100 including a plurality of pinholes according to an embodiment of the present invention, while the curved mirror 120 is manufactured by a metal deposition method, a portion corresponding to the hole 121 is covered so that the metal coating is applied. Since it is possible to manufacture the mirror 120 having a plurality of holes 121 in such a manner that it is not possible, there is a remarkable effect of easy manufacturing and low manufacturing cost.

On the other hand, in order to enable a user to clearly see a virtual image (augmented image) for realizing augmented reality, the coating of the mirror 120 should be thickened. Therefore, since it is difficult to see the real world through the mirror, conventionally, the mirror cannot be disposed in front of the user's eyes, or the sharpness of the virtual image is deteriorated by softening the coating in order to place the mirror in front of the user's eyes.

In the optical device 100 including a plurality of pinholes according to an embodiment of the present invention, since the user sees the real world through the plurality of holes 121 formed in the mirror 120 , the mirror 120 is thickly coated. However, there is no limit to seeing the real world. Therefore, while the metal coating is thick enough to see the virtual image clearly, the mirror 120 can be arranged in front of the user's eyes.

In addition, since the area that reflects the image light output from the display 110 is large, there is a remarkable effect that the virtual image can be viewed brightly and clearly.

Here, the hole 121 may be a circular hole 121 having a diameter of 0.5 mm or more and 5 mm or less in order to generate a pinhole effect, and more specifically, may have a diameter of 2 mm or less. 3 to 5 , even if the size of the hole 121 formed in the mirror 120 is small, the user can focus on the real world and see clearly by using the pinhole effect.

6 is a diagram illustrating an optical device 100 including a plurality of pinholes according to an embodiment of the present invention. As shown in FIGS. 3 and 4 , the optical device 100 including a plurality of pinholes according to an embodiment of the present invention is a part of the mirror 120 , in particular, a plurality of central portions where the user's pupil is located. Although the hole 121 of , as shown in FIG. 6 , a plurality of holes 121 may be formed in the mirror 120 as a whole. However, if a plurality of holes 121 are formed in the entire mirror 120 , the amount of light incident from the outside increases and the reflection area of the image light becomes narrow. (121) can be constructed.

7 is a view showing the configuration of the head mounted display device 10 using the optical device 100 including a plurality of pinholes as functional blocks according to an embodiment of the present invention. As shown in FIG. 7 , a head mounted display device 10 using an optical device 100 including a plurality of pinholes according to an embodiment of the present invention includes an optical device 100 and an HMD frame 200 . may be configured to include, and may further include a control unit 300 , a GPS module 400 , a camera 500 , a power supply unit 600 , a switch unit 700 , and a communication unit 800 . Since the optical device 100 has been described in detail with reference to FIGS. 3 to 6 , the description of the optical device 100 will be omitted and the remaining components will be described in detail below.

The HMD frame 200 is a frame configuration of the head wearable display device 10 that can be worn on the user's head. The HMD frame 200 may be configured in the form of a helmet or goggles having a frame structure through which light can enter while being worn on the user's head. Here, when the HMD frame 200 is made in the form of a helmet, it may be configured in a structure of a helmet (not shown) worn on the user's head and a frame (not shown) of the display 110 disposed in front of the helmet. In addition, when the HMD frame 200 is configured in the form of goggles, it may be configured in a structure of a band frame (not shown) that can be worn on the user's head, and a goggles frame (not shown) that is fastened and fixed to the band frame.

The head-wearable display device 10 using the optical device 100 including a plurality of pinholes according to an embodiment of the present invention includes a control unit 300 for generating image information and controlling it to be transmitted to the display 110; A GPS module 400 mounted on the HMD frame 200 to provide location information, a camera 500 mounted on the HMD frame 200 to take an image in the user's gaze direction, and a head-mounted display device 10 ) (10) a power supply unit 600 for supplying power for driving, a switch unit 700 for on/off of the power supply unit 600, and a communication unit that performs data communication under the control of the control unit 300 It may be configured to further include (800).

Here, the GPS module 400 may provide the user's location information, and the camera 500 may photograph the real world of the user's gaze. The controller 300 generates image information to be provided to the user based on information collected from the GPS module 400 , the camera 500 , and various other sensors and controls it to be transmitted to the display 110 , so that the user Through augmented reality, additional information about the external environment can be delivered to an optimized screen.

In addition, the switch unit 700 may be provided with a switch for on/off of the power supply unit 600 on one side of the HMD frame 200 or formed in a separate device connected to the HMD frame 200 by wire. can On the other hand, the communication unit 800 is connected and connected to the communication unit 800 of another adjacent head-wearable display device 10, and data communication can be performed so that various types of information such as location information and sensing information can be shared with each other. have. Here, the communication unit 800 may be understood that various wireless communication methods including 3G/4G/5G and LTE capable of Internet access are applied.

Meanwhile, the optical device 100 may be respectively positioned in the user's left eye and/or right eye in the HMD frame 200 . That is, as shown in FIGS. 3, 4, and 6 , two optical devices 100 may be located in the HMD frame 200 for each of the user's left and right eyes, but depending on the embodiment, The optical device 100 may be located only in either one of the left eye or the right eye.

In addition, as shown in FIGS. 3 and 6 , the display 110 may be positioned on both sides of the HMD frame 200 , and according to an embodiment, as shown in FIG. 4 , the display 110 . 2 may be located above the user's binocular position in the HMD frame 200 .

In addition, the display 110 is positioned above the user's left and/or right eye in the HMD frame 200 and outputs image light in the direction of the mirror 120 disposed in front of the user's left and/or right eye, or , located on the side of the user's left and/or right eye in the HMD frame 200 , may output image light toward the mirror 120 disposed in front of the user's left and/or right eye.

Meanwhile, according to an exemplary embodiment, the HMD frame 200 adjusts the distance between the user's eyes and the mirror 120 in order to optimize the pinhole effect generated by the plurality of holes 121 formed in the mirror 120 . For optimizing, it may further include an adjustment unit (not shown). By using an adjustment unit provided on the side of the HMD frame 200 to change the distance between the user's eyes and the mirror 120, an augmented reality optimized for the user can be provided.

As described above, according to the optical device 100 including a plurality of pinholes proposed by the present invention and the head-wearable display device 10 using the same, the mirror 120 disposed in front of the user's eyes is displayed A plurality of holes that reflect the image light output from the 110 so that the virtual image reaches the user's eyes, but create a pinhole effect in the mirror 120 so that the real world can be seen through the user's field of view By forming the 121, even if the darkly coated mirror 120 is placed in front, the real world is transmitted using the pinhole effect, and the reflection area of the image light is wide so that a bright and clear virtual image is transmitted to the user's eyes, and the optical device By simplifying the structure of (100), it is possible to reduce the weight and size.

In addition, according to the optical device 100 including a plurality of pinholes and the head-wearable display device 10 using the same proposed in the present invention, the mirror 120 is coated with metal except for the hole 121 by a vacuum deposition method. ) can be easily produced by making

Various modifications and applications of the present invention described above are possible by those skilled in the art to which the present invention pertains, and the scope of the technical idea according to the present invention should be defined by the following claims.

10: head mounted display device according to the present invention
100: optical device according to the present invention
110: display
120: mirror
121: Hall
200: HMD frame
300: control unit
400: GPS module
500: camera
600: power supply
700: switch unit
800: communication department

Claims (8)

An optical device (100) comprising:
a display 110 for outputting image light so that image information along with the real world can be provided to the user as an optimized screen; and
The pinhole is disposed in front of the user's eyes and reflects the image light output from the display 110 so that the virtual image reaches the user's eyes, and the real world can be seen through the user's field of view. Including a mirror 120 formed with a plurality of holes 121 to create an effect,
An optical device 100 including a plurality of pinholes, characterized in that the image light reflected by the mirror 120 along with the real world transmitted through the plurality of holes 121 reaches the user's eyes. ).
According to claim 1, wherein the hole 121,
An optical device 100 including a plurality of pinholes, characterized in that the circular hole 121 has a diameter of 0.5 mm or more and 5 mm or less.
According to claim 2, wherein the hole 121,
An optical device 100 including a plurality of pinholes, characterized in that the diameter is 2 mm or less.
According to claim 1, The mirror 120,
An optical device 100 including a plurality of pinholes, which is coated with a metal except for the hole 121 to reflect the image light.
According to claim 4, The mirror 120,
An optical device 100 including a plurality of pinholes, characterized in that the metal is coated by a vacuum deposition method.
According to claim 1, The mirror 120,
An optical device 100 including a plurality of pinholes, characterized in that it has a curved surface to reflect the image light output from the display 110 and transmit it to the user's eyes.
A head mounted display device (10) comprising:
HMD frame 200 that can be worn on the user's head; and
and an optical device 100 that provides augmented reality to a user wearing the HMD frame 200,
The optical device 100,
a display 110 for outputting image light so that image information along with the real world can be provided to the user as an optimized screen; and
The pinhole is disposed in front of the user's eyes and reflects the image light output from the display 110 so that the virtual image reaches the user's eyes, and the real world can be seen through the user's field of view. Including a mirror 120 formed with a plurality of holes 121 to create an effect,
An optical device 100 including a plurality of pinholes, characterized in that the image light reflected by the mirror 120 along with the real world transmitted through the plurality of holes 121 reaches the user's eyes. ) using a head-mounted display device (10).
According to claim 1, wherein the optical device 100,
A head-wearable display device (10) using an optical device (100) including a plurality of pinholes, characterized in that the HMD frame (200) is positioned in the left eye and/or the right eye of the user, respectively.

Images