KR102226639B1 - An optical apparatus with plural pin-mirrors and a head mounted display apparatus having thereof - Google Patents

Abstract

The present invention relates to an optical device having multiple pin-mirrors disposed therein. The optical device comprises: an optical system disposed in front of the eyes of a user; and a display outputting image light. Therefore, the optical device can reduce the loss of an amount of the image light and provide a clear image.

Description

An optical device in which a plurality of pin mirrors are arranged and a head-worn display device using the same {AN OPTICAL APPARATUS WITH PLURAL PIN-MIRRORS AND A HEAD MOUNTED DISPLAY APPARATUS HAVING THEREOF}

The present invention relates to an optical device and a head-worn display device using the same, and more particularly, to an optical device in which a plurality of pin mirrors are disposed and a head-worn display device using the same.

Various wearable devices are being developed according to the trend of lightening and miniaturization of digital devices. A head mounted display, which is a type of wearable device, refers to various devices that can be worn by a user to receive multimedia contents and the like. 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. These head-mounted displays (HMD) are divided into see-through type and see-closed type, and the transmissive type is mainly used for Augmented Reality (AR), and the sealed type is mainly used for virtual reality (Virtual Reality). Reality, VR).

FIG. 1 is a diagram showing 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, respectively, the head-mounted display in the form of glasses or bands projects image information of augmented reality (AR) onto the real world through a lens worn on the face or head of the user and transmitted. 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, but manufacturing is difficult due to the complicated structure of the optical device, and there is a limitation in that the size of the optical device is large and the weight is heavy. In particular, in a process in which image light output from a display is transmitted to the user's eyes through an optical system in order to generate and transmit a virtual image, there is a problem in that efficiency is lowered due to a loss of the amount of light.

Meanwhile, as a prior art related to the present invention, Patent Publication No. 10-2016-0032656 (name of the invention: optical device for augmented reality, publication date: March 24, 2016) has been disclosed.

The present invention has been proposed to solve the above problems of the previously proposed methods, and by arranging a plurality of optical units that generate a pinhole effect according to the distribution of the amount of light that the image light output from the display reaches the optical system, the display By reflecting the image light output from a plurality of optical units and transmitting the image information to the user's eyes, the loss of the amount of light of the image light can be reduced and a clear image can be provided. It is an object of the present invention to provide an optical device in which a plurality of pin mirrors are disposed and a head-worn display device using the same, which can match the luminance of

An optical device in which a plurality of pin mirrors are disposed according to a feature of the present invention for achieving the above object,

As an optical device,

An optical system disposed in front of the user's eyes and allowing the real world to be seen through the user's field of view; And

Including a display for outputting the image light so that the image information can be provided as an optimized screen to the user together with the real world transmitted through the optical system,

The optical system,

Reflecting the image light output from the display to transmit the image information to the user's eyes, comprising a plurality of optical units configured to generate a pinhole effect by being composed of a mirror having a predetermined size or less,

The plurality of optical units is characterized in that the image light output from the display is arranged according to a distribution of an amount of light reaching the optical system.

Preferably, the plurality of optical units,

As the amount of image light reaching the optical system decreases, more optical units may be disposed.

More preferably, the plurality of optical units,

According to the distribution of the amount of image light output from the display and reaching the optical system, the luminance may be disposed more in a lower luminance than a higher luminance based on a luminance decrease portion in which the luminance rapidly changes.

Even more preferably, the plurality of optical units,

They can be arranged at predetermined intervals.

Preferably, the display may be located above the optical system.

In addition, a head-worn display device using an optical device in which a plurality of pin mirrors are disposed according to a feature of the present invention for achieving the above object,

As a head-worn display device,

HMD frame that the user can wear on the head;

An optical system disposed in front of the eyes of a user wearing the HMD frame, and allowing the real world through the user's field of view to be transmitted through and seen; And

Including a display for outputting the image light so that the image information can be provided as an optimized screen to the user together with the real world transmitted through the optical system,

The optical system,

It reflects the image light output from the display and transmits the image information to the user's eyes, and includes a plurality of optical units configured to be less than a predetermined size to generate a pinhole effect,

The plurality of optical units is characterized in that the image light output from the display is arranged according to a distribution of an amount of light reaching the optical system.

Preferably, the plurality of optical units,

As the amount of image light reaching the optical system decreases, more optical units may be disposed.

Preferably, the display,

It may be configured in plural so as to output image light for the user's left eye and image light for the user's right eye, respectively.

According to the optical device in which a plurality of pin mirrors are disposed and a head-worn display device using the same, a plurality of optics that generate a pinhole effect according to the distribution of the amount of light that reaches the optical system from the image light output from the display. By arranging the unit, by reflecting the image light output from the display from a plurality of optical units and transmitting the image information to the user's eyes, it is possible to reduce the loss of the amount of light of the image light and provide a clear image. You can arrange a lot to match the luminance of the entire screen.

1 is a diagram showing a schematic configuration of a general glasses-type head mounted display (HMD).
2 is a diagram showing a schematic configuration of a general band-type head mounted display (HMD).
3 is a view illustrating an optical device in which a plurality of pin mirrors are disposed according to an embodiment of the present invention.
4 is a diagram illustrating, for example, a distribution of the amount of light output from a display.
5 is a view as viewed from an upper side of the image light transmitted to the user's eyes.
6 is a view showing a view from above of an optical device in which a plurality of pin mirrors are disposed according to an embodiment of the present invention.
7 is a view as viewed from above of a state in which image light is transmitted to a user's eyes through an optical device in which a plurality of pin mirrors are disposed according to an embodiment of the present invention.
8 is a diagram showing a configuration of a head-worn display device using an optical device in which a plurality of pin mirrors are disposed according to an embodiment of the present invention as a function block.

Hereinafter, preferred embodiments will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. 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 subject matter 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 said to be connected to another part, this includes not only the case that it is directly connected, but also the case that it is indirectly connected with another element interposed therebetween. In addition, the inclusion of certain components means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

3 is a diagram illustrating an optical device 100 in which a plurality of pin mirrors are disposed according to an embodiment of the present invention. As shown in FIG. 3, the optical device 100 in which a plurality of pin mirrors are disposed according to an embodiment of the present invention may be configured to include an optical system 110 and a display 120, and the optical system 110 ) May include an optical unit 111.

That is, in the optical device 100, it is disposed in front of the user's eyes, and is transmitted through the optical system 110 and the optical system 110 so that the real world through the user's field of view can be transmitted and seen. Augmented reality may be implemented by including a display 120 that outputs image light so that image information can be provided as an optimized screen to the user together with the real world visible. The optical unit 111 included in the optical system 110 reflects the image light output from the display 120 and transmits image information to the user's eyes. Accordingly, the user can experience augmented reality in which the real world transmitted through the optical system 110 and image information reflected from the optical unit 111 are combined.

Hereinafter, each component constituting the optical device 100 in which a plurality of pin mirrors are disposed according to an embodiment of the present invention will be described in detail with reference to FIG. 3.

The optical system 110 is disposed in front of the user's eyes, and is configured to allow the real world to be transmitted through the user's field of view. The optical system 110 is a glass shape through which the real world can be seen through the user's field of view, and may be configured as a transparent lens, and may implement augmented reality by including a plurality of optical units 111.

The display 120 may output image light so that image information can be provided to a user as an optimized screen together with the real world transmitted through the optical system 110. The display 120 may output image information providing various types of information to a user based on an augmented reality under the control of the controller 300 to be described later.

In this case, the display 120 may be located above the optical system 110 in front of the user's eye, as shown in FIG. 3, but may be located on the left or right side, under the optical system 110, or the like.

4 is a diagram illustrating, for example, a distribution of the amount of light of image light output from the display 120. As shown in FIG. 4, a distribution of the amount of light of image light output from the display 120 may be a distribution of a point spread function (PSF). That is, the size of the optical system 110 is much larger than the size of the display 120 in general, but there may be a distribution in which the amount of light is large only in a portion corresponding to the area of the display 120, and the amount of light rapidly decreases when it goes outside the area. In this case, the distribution of the amount of light of the image light reaching the optical system 110 may be different from when it is output, and may change according to a positional relationship between the display 120 and the optical system 110. In the following, for convenience of explanation, as shown in FIG. 3, the display 120 is positioned above the optical system 110 and outputs image light toward the optical system 110 in a downward direction, and is shown in FIG. 4. The description will be made on the basis of the case where the light quantity distribution of the image light as described above reaches the optical system 110 equally.

5 is a view as viewed from above of image light transmitted to the user's eyes. That is, when the image light having the light quantity distribution as shown in FIG. 4 reaches the optical system 110, as shown in FIG. 5, the image light is reflected from the optical unit 111 located in front of the user's pupil. It conveys video information to the eyes. At this time, only a part of the portion of the image light having a large amount of light is reflected by the optical unit 110 and the rest is lost. Therefore, there is a limit in which it is not possible to secure a sufficient amount of light.

In particular, the optical unit 111 may be a pin mirror configured with a mirror having a predetermined size or less to generate a pinhole effect. In this case, the pin mirror may be 4 mm or less for generating the pinhole effect, and more specifically, a small mirror of 3 mm or less. In this way, when the pin mirror is used, the focus is adjusted using the optical device 100 having a simple structure in which weight and volume are reduced, so that both the real world and image information can be clearly viewed. However, as shown in FIG. 5, since the size of the pin mirror is small, only a part of the high luminance portion with a large amount of light is reflected, and the peripheral portion is lost as it is, so that a sufficient amount of light for providing image information can be secured. No, there is a problem that the sharpness of the image is lowered.

FIG. 6 is a diagram illustrating a view of an optical device 100 in which a plurality of pin mirrors are disposed according to an embodiment of the present invention for solving the above-described problem. As shown in FIG. 6, the optical system 110 of the optical device 100 in which a plurality of pin mirrors are disposed according to an embodiment of the present invention reflects the image light output from the display 120 to reflect the user's eyes. It transmits image information to, but includes a plurality of optical units 111 that are composed of mirrors having a predetermined size or less to generate a pinhole effect, and the plurality of optical units 111 include image light output from the display 120 It can be arranged according to the distribution of the amount of light reaching the optical system 110. That is, in the plurality of optical units 111, as the amount of image light reaching the optical system 110 decreases, more optical units 111 may be disposed.

More specifically, the plurality of optical units 111 have a higher luminance based on a luminance decrease portion in which the luminance rapidly changes according to the distribution of the amount of image light output from the display 120 and reaching the optical system 110. More can be placed on the lower luminance side. For example, the distribution of the amount of image light output from the display 120 and reaching the optical system 110 is a PSF distribution, and according to the distribution of the amount of light, the luminance decreases sharply based on the high luminance portion that the image light mainly reaches. The number of optical units 111 may be arranged to gradually increase as the portion passes through the portion and the outer luminance decreases. That is, when the distribution of the amount of image light as shown in FIG. 4 reaches the optical system 110, as shown in FIG. 6, one pin mirror is located at the high luminance portion at the center where a large amount of light is reached, and the outer side thereof. Two pin mirrors may be disposed at the lower luminance portion of the, and three pin mirrors may be disposed at the outer lower luminance portions where the smallest amount of light is reached. In this way, by arranging the pin mirror on the outer portion of low luminance, the FOV can be increased, and in particular, by arranging many pin mirrors on the low luminance portion, the luminance of the entire screen can be adjusted.

In this case, the plurality of optical units 111 may be disposed at predetermined intervals. Here, the predetermined interval may be different depending on the size, shape, arrangement angle, light amount distribution, etc. of the optical system 110 or the optical unit 111, and specifically, may be 1 to 20 mm.

FIG. 7 is a view as viewed from above of a state in which image light is transmitted to the user's eyes through the optical device 100 in which a plurality of pin mirrors are disposed according to an embodiment of the present invention. As shown in FIG. 7, when the optical device 100 in which a plurality of pin mirrors are disposed according to an embodiment of the present invention is used, image light having a light quantity distribution as shown in FIG. 4 is transmitted to the optical system 110. When reaching, the plurality of optical units 111 arranged according to the distribution of the amount of light reflects the image light, and transmits the image information to the user's eyes while maintaining the total amount of light as much as possible. Therefore, it is possible to secure sufficient light intensity by minimizing light loss, provide clear and bright image information to the user, balance the luminance of the entire screen, and increase overall efficiency.

Meanwhile, the plurality of optical units 111 may have at least one or more of transmittance and reflectance different from each other according to the disposed position. That is, by adjusting the optical properties of the pin mirrors to be different from each other according to the arranged position, it is possible to minimize light loss and increase overall efficiency.

8 is a diagram showing a configuration of a head-worn display device 10 using an optical device 100 in which a plurality of pin mirrors are disposed according to an embodiment of the present invention as a functional block. As shown in FIG. 8, a head-worn display device 10 using an optical device 100 in which a plurality of pin mirrors are disposed according to an embodiment of the present invention includes an optical device 100 and an HMD frame 200. ), 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 7, a 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-worn display device 10 that the user can wear on the head. The HMD frame 200 may be configured in the form of a helmet or goggles having a frame structure that allows light to enter while the user is wearing it on the head. Here, when the HMD frame 200 has a helmet shape, it may be configured with a helmet (not shown) worn on the user's head and a frame (not shown) of the display 120 disposed in front of the helmet. In addition, when the HMD frame 200 is configured in the form of goggles, it may be configured with a band frame (not shown) that can be worn on the user's head, and a goggle frame (not shown) fastened and fixed to the band frame.

The head-worn display device 10 using the optical device 100 in which a plurality of pin mirrors are arranged according to an embodiment of the present invention includes a control unit 300 that generates image information and controls it to be transmitted to the display 120. , A GPS module 400 mounted on the HMD frame 200 to provide location information, a camera 500 mounted on the HMD frame 200 to capture an image in the user's gaze direction, and a head-worn display device ( 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 800 performing data communication under the control of the control unit 300 ) May be further included.

Here, the GPS module 400 provides location information of the user, and the camera 500 may photograph the real world of the user's gaze. The control unit 300 generates image information to be provided to the user based on information collected from the GPS module 400, the camera 500, and other various sensors and controls it to be transmitted to the display 120, thereby allowing the user to Through augmented reality, it is possible to receive additional information about the external environment through an optimized screen.

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

Meanwhile, the display 120 may be configured in plural so as to output image light for the user's left eye and image light for the user's right eye, respectively. That is, the head-worn display device 10 includes two optical devices 100 each composed of an optical system 110 and a display 120, and outputs and reflects image light for the user's left and right eyes, respectively. Augmented reality can be implemented by transmitting image information to the user's left eye and right eye respectively. For example, two displays 120 may be located on the upper surface of the user's both eyes in the HMD frame 200. Depending on the embodiment, the display 120 may be positioned on both sides of the HMD frame 200.

As described above, according to the optical device 100 in which a plurality of pin mirrors are disposed and the head-worn display device 10 using the same, the image light output from the display 120 is transmitted to the optical system 110. ), by arranging a plurality of optical units 111 that generate a pinhole effect according to the distribution of the amount of light reaching the ), the image light output from the display 120 is reflected from the plurality of optical units 111 to be imaged by the user's eyes. By transferring information, it is possible to reduce the loss of the amount of light of the image light and provide a clear image, and it is possible to adjust the luminance of the entire screen by arranging a large number of mirrors on the outer part of low luminance.

The present invention described above can be modified or applied in various ways by those of ordinary skill in the technical field to which the present invention belongs, and the scope of the technical idea according to the present invention should be determined by the following claims.

10: Head-worn display device according to the present invention
100: optical device
110: optical system
111: optical unit
120: display
200: HMD frame
300: control unit
400: GPS module
500: camera
600: power supply
700: switch unit
800: Ministry of Communications

Claims (8)

As an optical device 100,
An optical system 110 disposed in front of the user's eyes and allowing the real world to be transmitted and seen through the user's field of view; And
Including a display 120 for outputting image light so that the image information can be provided to the user together with the real world transmitted through the optical system 110,
The optical system 110,
It reflects the image light output from the display 120 and transmits the image information to the user's eyes, and includes a plurality of optical units 111 configured of a mirror having a predetermined size or less to generate a pinhole effect,
The plurality of optical units 111 are arranged according to a distribution of the amount of light that reaches the optical system 110 of the image light output from the display 120,
The plurality of optical parts 111,
Optical device (100) in which a plurality of pin mirrors are arranged, characterized in that as the amount of image light reaching the optical system (110) decreases, more optical units (111) are arranged. delete The method of claim 1, wherein the plurality of optical units 111
According to the distribution of the amount of image light output from the display 120 and reaching the optical system 110, based on the luminance drop portion where the luminance rapidly changes, more of the luminance is disposed on the lower luminance side than on the higher luminance side. The optical device 100 in which a plurality of pin mirrors are disposed. The method of claim 3, wherein the plurality of optical parts 111,
The optical device 100 in which a plurality of pin mirrors are arranged, characterized in that they are arranged at predetermined intervals. The method of claim 1, wherein the display 120,
An optical device 100 in which a plurality of pin mirrors are disposed, characterized in that it is located above the optical system 110. As a head-worn display device 10,
HMD frame 200 that the user can wear on the head;
An optical system 110 disposed in front of the eyes of the user wearing the HMD frame 200 and allowing the real world through the user's field of view to be transmitted and seen; And
Including a display 120 outputting image light so that image information can be provided to a user along with the real world transmitted through the optical system 110,
The optical system 110,
It reflects the image light output from the display 120 and transmits the image information to the user's eyes, but includes a plurality of optical units 111 configured to be less than a predetermined size to generate a pinhole effect,
The plurality of optical units 111 are arranged according to a distribution of the amount of light that reaches the optical system 110 of the image light output from the display 120,
The plurality of optical parts 111,
Head-worn display device 10 using an optical device 100 in which a plurality of pin mirrors are disposed, characterized in that the optical unit 111 is disposed more as the amount of image light reaching the optical system 110 decreases . delete The method of claim 6, wherein the display 120,
A head-worn display device 10 using an optical device 100 in which a plurality of pin mirrors are disposed to output image light for the user's left eye and image light for the user's right eye, respectively. .

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