KR101388980B1 - Head mounted display apparatus - Google Patents

Abstract

The head mounted display device according to the present invention includes a wearing part worn on a user's head, a housing installed on the wearing part and positioned on the face of the user, a display installed inside the housing and positioned in the user's gaze direction and the And an optical system installed between the display inside the housing and the user's gaze direction, wherein the optical system is installed between at least one aspherical lens and the aspheric lens and the user's gaze direction installed at a position adjacent to the display. Including a spherical lens, the head mounted display device according to the embodiment of the present invention provides a stable and clear image to a user by minimizing distortion of the image when the image of the micro display providing high resolution is viewed through an optical system. Number And, also it has the effect of the adjustment to enable the distances between the distance and both eyes and the display between the display respectively located in both sides to enable the position control to match the physical characteristics.

Description

Head Mounted Display Devices {HEAD MOUNTED DISPLAY APPARATUS}

The present invention relates to a head mounted display device, and more particularly, to a head mounted display device to be worn on the user's head to provide an image to each of the eyes of the user.

In general, a head mounted display (HMD) includes a head mount worn on a user's head and a near-to-eyes display coupled to the head mount to provide an image close to the user's eyes. do. In addition, the proximity display typically includes one or two micro display elements, a magnify lens, and an associated optical system.

Recently, the head mounted display device is mainly used for realizing images of military, medical and educational imaging systems and entertainment virtual reality systems, and recently, it is also used in home or portable imaging devices. In addition, the head mounted display device has a very short focal length and may be classified into a monocular type or a binocular type.

Meanwhile, the reason why the enlarged lens is used in the head mounted display device is to enlarge the image so that the user can watch the largest screen as the image of the proximity display is displayed with a very small display area. However, when the magnifying lens and the optical system are used, optical distortion inevitably occurs. This optical distortion causes severe fatigue on the eyes when the head mounted display device is worn for a long time, which makes it difficult to wear for a long time.

Furthermore, since the head mounted display device has a very short focal length, there is a problem that the optical distortion phenomenon is more noticeable. On the other hand, such distortion may be minimized depending on the design of the optical system, but it is difficult to completely eliminate it. In addition, the image processing method can be used to solve a part of the Korean soup, but in this case, a high-cost hardware configuration is required, there is a limit to apply to the head mounted display device.

US published patent US2011 / 0234584, "HEAD-MOUNTED DISPLAY DEVICE",

The present invention is to solve the above problems, an object of the present invention is to provide a head mounted display device to minimize the distortion caused by the lens configuration of the optical system, and to further improve the wear and use efficiency. .

The head mounted display device according to the present invention includes a wearing part worn on a user's head, a housing installed on the wearing part and positioned on the face of the user, a display installed inside the housing and positioned in the user's gaze direction; And an optical system installed between the display inside the housing and the user's gaze direction, wherein the optical system is disposed between at least one aspherical lens and the aspheric lens and the user's gaze direction installed at a position adjacent to the display. It includes a spherical lens to be installed.

The aspherical lens is positioned on the other surface of the first aspherical lens and the first aspherical lens having a parabolic surface having a predetermined width on one surface facing the display, and the double curved surface is formed on one surface of the first aspherical lens in contact with the other surface. It may include two aspherical lenses.

The vertical width of the display may be equal to or less than the width of the parabolic surface of the first aspherical lens.

The spherical lens and the aspherical lens may be cut in the upper and lower portions to reduce the black area of the display to provide a wide view.

The spherical lens is installed at a position adjacent to the aspherical lens side and is a convex lens convex in the direction of the user's eyes and a convex lens and a convex lens of the biconvex lens installed at a position adjacent to the convex surface of the flat convex lens. It may include a spherical concave lens positioned in the eye direction and having a concave surface in contact with the convex sphere of the biconvex lens.

An acceleration sensor may be installed inside the housing.

The display and the optical system may include a first display, a first optical system, a second display, and a second optical system corresponding to the left and right eyes of the user.

The processor may include a processor configured to provide an image to the first display and the second display, and an external source configured to provide an image signal to the processor.

The external source is portable and may include a memory in which a source image is stored.

The processor may provide the image by dividing the image into a first display and a second display.

The wearing part includes a head band part surrounding the head of the user and a head support part coupled to both sides of the head band part to surround the user's head, and the head band part and the head support part adjust an inner diameter to fit the head size of the user. It may be provided with a control unit to enable.

An installation bracket is installed on the head band portion, a swing arm is installed on the installation bracket, and the swing arms may have a first arm and a second arm each having a long hole extending in parallel with each other. have.

An adjustment bolt is disposed between the first arm and the second arm, the housing support being coupled to an upper portion of the housing and extending through the long hole of the first arm, the housing support, and the long hole of the second arm. It may be provided.

The housing support may have a long hole extending in the longitudinal direction of the housing support.

A first lens cover and a second lens cover are provided inside the housing, and a lower portion of each of the first lens cover and the second lens cover is exposed to the outside of the housing to expose the first lens cover and the second lens cover. A knob may be provided to adjust the gap between the lens covers.

The housing may include a guide bar for guiding the adjustment operation of the first lens cover and the second lens cover, and a leaf spring for pressing and supporting the first lens cover and the second lens cover.

The head mounted display device according to the embodiment of the present invention as described above can provide a stable and clear image to the user by minimizing the distortion of the image when the image of the micro display providing high resolution through the optical system. The distance between the displays positioned on both eyes and the distance between the eyes and the display can be adjusted so that the position can be adjusted according to physical characteristics. In addition, by using a portion of the lens as a plastic lens, there is an effect to reduce the weight by cutting the unnecessary upper and lower ends of the lens.

1 is a perspective view illustrating a head mounted display device according to an embodiment of the present invention.
2A and 2B are perspective views illustrating a housing of a head mounted display device according to an embodiment of the present invention.
3 is an exploded perspective view illustrating a housing of a head mounted display device according to an embodiment of the present invention.
4 is a block diagram of a head mounted display device according to an embodiment of the present invention.
5 is a diagram illustrating an optical system provided in the head mounted display device according to the embodiment of the present invention.
6 is a graph measuring a distortion ratio of an optical system included in a head mounted display device according to an exemplary embodiment of the present invention.

Hereinafter, an embodiment of a head mounted display device according to the present invention will be described with reference to the drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, To be fully informed.

1 is a perspective view showing a head mounted display device according to an embodiment of the present invention, Figures 2a and 2b is a perspective view showing a housing 200 of the head mounted display device according to an embodiment of the present invention.

As shown in FIGS. 1 and 2A and 2B, the head mounted display device according to the embodiment of the present invention is installed on the wearing part 100 and the wearing part 100 which are worn on the user's head and is placed on the face of the user. It is provided with a display housing 200 located.

The wearing part 100 includes a head band part 110 surrounding a head of a user and a head support part 130 coupled to both sides of the head band part 110 to surround an upper part of a user's head. The head band unit 110 and the head support unit 130 are provided with a band adjusting unit 120 and the support adjusting unit 140 to adjust the inner diameter to match the size of the user's head. Tightening bolts are installed on each of the adjusting parts 120 and 140 to be fixed to a state in which wearing and adjustment are made.

In addition, the mounting bracket 111 is installed at the front of the head band part 110, and swing arms 112 and 113 are installed at the mounting bracket 111. The swing arms 112 and 113 each have a first arm 112 and a second arm 113 extending in parallel, and each of the swing arms 112 and 113 has a long hole extending in the longitudinal direction ( 112a) 113a are formed.

In addition, a housing support portion 210 coupled to an upper portion of the housing 200 and extended between the first arm 112 and the second arm 113 is positioned therebetween. The housing support 210 has a long hole 211 extending in the longitudinal direction of the housing support 210. Therefore, the adjustment bolt 160 which penetrates the long hole 112a of the 1st arm 112, the long hole 211 of the housing support part 210, and the long hole 113a of the 2nd arm 113 is installed, and a 1st arm is installed. The 112, the housing support 210, and the second arm 113 are locked or unlocked from each other.

Meanwhile, as shown in FIGS. 2A and 2B, the housing 200 has a rectangular enclosure shape, and a seating portion 203 is formed in a lower center portion in which a nose, etc., in which a user's nose is seated is seated, and both eyes of a user are formed. An obstruction portion 204 is formed to block the outer field of view.

3 is an exploded perspective view illustrating a housing of a head mounted display device according to an embodiment of the present invention.

As shown in FIG. 3, the housing 200 forming the exterior as described above is composed of the front cover 220, the rear cover 230, and the upper cover 240 to form an overall appearance. In addition, a control board 250 having a head tracker including a process 252 and an acceleration sensor 251 for controlling an operation is provided below the upper cover 240. The frame 260 is provided below the control board 250.

The lower part of the frame 260 is provided with a first lens cover 270 and a second lens cover 280, each of which consists of an upper lens cover 271 and a lower lens cover 272, and each first lens cover ( The optical system 300, 310, and the micro display 320, 330 are installed in the interior of the second lens cover 290 and 270.

And a lower portion of each lens cover 270, 280 is provided with a knob 290, the knob 290 is to allow the respective lens cover 270, 280 to adjust the position in the lateral direction. . In addition, for this purpose, a guide bar 291 is provided between the control board 250 and the frame 260 to support four guide parts 271 having a ring shape formed on each lens cover 270 and 280. In addition, leaf springs 292 are installed to allow each lens cover 270 and 280 to be stably held at the adjusted position.

A first viewing window 201 and a second viewing window 202 are provided to allow the left eye and the right eye of the user to be positioned at a portion worn on the user face of the rear cover 230 of the housing 200.

4 is a block diagram of a head mounted display device according to an embodiment of the present invention. As shown in FIG. 4, the micro display 320 and 330 installed together with the optical system 300 and 310 display an image in the direction of the user's eye, and the micro display 320 and 330 and the viewing window 201. Between the 202, the optical system 300, 310 consisting of a plurality of lenses is provided.

The micro display 320, 330 is a high resolution micro thin film display device of 1280 × 1024. For example, organic light emitting diodes (OLEDs) or liquid crystal displays (LCDs) may be used. The display device according to the embodiment of the present invention can be implemented with a minimum component using a scaler.

Meanwhile, the display 320 or 330 includes a first display 320 installed in a direction in which the first viewing window 201 is located and a second display 330 installed in a direction located in the second viewing window 202. do. The first optical system 300 is provided between the first display 320 and the first viewing window 201, and the second optical system 310 is provided between the second display 330 and the second viewing window 202. .

In addition, the head tracker installed together with the acceleration sensor 251 on the control board 250 inside the housing 200 may provide motion tracking for providing an adaptive image to the display to move the screen as the user's head moves. motion tracking) enable motion.

In addition, a processor 252 for providing an image to the first display 320 and the second display 330 is installed inside the housing 200. The processor 252 may divide an image into a first display 320 and a second display 330, and provide the divided image.

An external source 400 for providing an image signal to the processor 252 is provided. The external source 400 may be separately provided outside the housing 200. That is, the external source 400 is portable and may include a portable computer terminal having a memory in which a source image is stored therein, and the external source 400 and the housing 200 may be connected by a wired method such as USB or HDMI. Data transmission may be performed, or data transmission and reception may be performed by a wireless local area communication method. In addition, power for the operation of the display 310 and 330 and the control board 250 may be provided from the external source 400 using USB or HDMI.

Meanwhile, the first optical system 300 and the second optical system 310 are implemented in the same configuration. Therefore, hereinafter, the embodiment of the first optical system 300 will be described, and through this, the structure of the second optical system 310 can be understood.

5 is a diagram illustrating an optical system provided in the head mounted display device according to the embodiment of the present invention. As shown in FIG. 5, the optical system 300 and 310 may include at least one aspherical lens 301 and 302 and aspheric lens 301 and 302 installed in a position adjacent to the display 320 and 330. And spherical lenses 303 and 304 and 305 provided between the 201 and 202.

The aspherical lens 301 and 302 includes a first aspherical lens 301 having a parabolic surface having a predetermined width formed on one surface facing the display 320 and positioned on the other surface of the first aspherical lens 301 and having a first aspherical surface. The second aspherical lens 302 has a double curved surface formed on one surface in contact with the other surface of the lens 301. In addition, the vertical width of the display 320 is provided to be equal to or less than the width of the paraboloid of the first aspherical lens 310 such that the display 320 is positioned within the vertical width of the paraboloid of the first aspherical lens 301.

The spherical lenses 303, 304, and 305 are installed at positions adjacent to the aspherical lenses 301 and 302, and are formed of the convex lenses 330 and the convex lenses 330 convex toward the viewing window side in the user's gaze direction. Pseudo lens having a concave surface in contact with the convex spherical surface of the biconvex lens 340 and the convex spherical surface of the biconvex lens 340 is located on the surface facing the viewing window 201 of the biconvex lens 340 is installed adjacent to the convex surface ( 350). The above-described lens configuration of the first optical system 300 is similarly implemented in the second optical system 310.

The configuration of the optical system according to the exemplary embodiment of the present invention may obtain very low distortion rate of about 5% as shown in the measurement graph shown in FIG. 6. In addition, the spherical lenses 303, 304, 305 and the aspherical lens 301, 302 are both upper and lower parts so that the black area of the display 320, 330 is reduced to provide a wide view Can be cut. In addition, the optical system in the embodiment of the present invention is configured to provide a field of view (FOV) 60. In addition, the spherical lenses 303, 304 and 305 may be made of a plastic material, and as described above, the upper and lower parts of the lenses may be cut to reduce the weight of the lens as a whole. In addition, cutting the upper and lower parts of the lens can reduce the size of the barrel because the shape of the barrel, which is the housing of the optical system in which the lenses are accommodated, can be reduced to a rectangular shape.

Hereinafter, the operation of the head mounted display device according to the embodiment of the present invention configured as described above will be described.

The user wears the head mounted display device on the head to tighten the head band part 110 and the head support part 130 using the band adjusting part 120 and the support adjusting part 140 to fit the head of the user. Then adjust the position of the housing 200. Position adjustment of the housing 200 may be performed in three ways. First, vertical position adjustment of the housing 200, front and rear position adjustment of the housing 200, and gap adjustment between the display 320 and 330 are performed.

The up and down position adjustment of the housing 200 is made by loosening the adjusting bolt 160 and moving the housing 200 up and down along the long hole of the housing support 210 to adjust the up and down position of the housing 200. And the front and rear position adjustment of the housing 200 when moving the housing 200 back and forth along the holes 112a, 113a of the first arm 112 and the second arm 113 in a state in which the adjustment bolt 160 is loosened. Turn on the position adjustment is made, and when the adjustment is complete, you can maintain the adjustment state by tightening the adjustment bolt 160.

In addition, the gap between the displays is adjusted when the user adjusts the knob 290 installed on the lower portion of the housing 200 while the user is watching the displays 320 and 330. When the housing 200 is folded upward during use, the first arm 112 and the second arm 113 swing upward and downward to flip the entire housing 200 onto the user's head.

Meanwhile, when the display 320 or 330 starts to operate, an image signal is provided to the process 252 from the external source 400. The signal provided to the process 252 may be a signal divided into the first display 320 and the second display 330, respectively, or the image signal may be converted into the first display 320 and the second display ( 330 may be divided to fit.

When an image signal is provided to the process 252, the process 252 outputs and provides an image signal to the first display 320 and the second display 330, respectively. When the user's head moves while the video signal is provided to the first display 320 and the second display 330, the acceleration sensor 251 detects it and transmits it to the process 252.

Process 252 sends the sensed motion signal to external source 400. The external source 400 calculates the movement signal, extracts a tracking screen corresponding to the movement, and transmits the same to the process 400. In addition, the process 400 provides a tracking image to the first display 320 and the second display 330.

The head mounted display device according to the embodiment of the present invention as described above uses a total of five lenses, of which two aspherical lenses are provided with glass lenses, and three spherical lenses are provided with plastic lenses. They cut the top and bottom to reduce the weight of the head mounted display. By concentrating the parts applied to the circuit board, it is possible to implement without using additional devices such as a controller, and to distribute the concentrated weight per unit area so that the user can feel lighter.

In addition, the display device has reduced resistance with a minimum number of components, and in an embodiment, an HDMI-only receiver can be used, and the three representative resolutions allow the power of three chips to be operated in a switching regulating manner. Implemented to use power.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

100.Wear
200 ... Housing
300 ... First Optical System
310 ... Second Optical System
320 ... 1st display

Claims (16)

A wearing part worn on a user's head;
A housing installed in the wearing part and positioned on the face of the user;
A display installed in the housing and positioned in the user's gaze direction; And
And an optical system installed between the display inside the housing and the user's gaze direction, wherein the optical system is installed between at least one aspherical lens and the aspheric lens and the user's gaze direction installed at a position adjacent to the display. Including a spherical lens,
An installation bracket is installed on the wearing part, and a swing arm is hingedly installed on the installation bracket.
Each of the swing arms includes a first arm and a second arm extending in parallel, and the first arm has a first arm side hole extending in the longitudinal direction, and the second arm extends in the longitudinal direction. 2arm side holes are formed,
Between the first arm and the second arm is located a housing support coupled to the upper portion of the housing extending,
An adjustment bolt which sequentially passes through the first arm side hole of the first arm, the housing support part, and the second arm side hole of the second arm,
And a housing support side side hole extending from the housing support part in a length direction of the housing support part, through which the adjustment bolt penetrates.
The aspheric lens of claim 1, wherein the aspherical lens is positioned on the other surface of the first aspherical lens and the first aspherical lens having a parabolic surface having a predetermined width formed on one surface facing the display, and the other surface of the first aspherical lens. A head mounted display device comprising a second aspherical lens having a double curved surface.
The head mounted display device of claim 2, wherein an upper and lower width of the display is equal to or less than a width of the parabolic surface of the first aspherical lens.
The head mounted display device of claim 1, wherein the spherical lens and the aspherical lens have upper and lower portions cut to reduce a black area of the display to provide a wide view.
The method of claim 1, wherein the spherical lens is installed in a position adjacent to the aspherical lens side and the convex lens convex in the user's line of sight and the convex lens and the both convex lens installed in a position adjacent to the convex surface of the flat convex lens and the amount A head mounted display device comprising a convex lens positioned in the direction of the user's eye of the convex lens and having a concave surface in contact with the convex spherical surface of the biconvex lens.
The head mounted display device of claim 1, wherein an acceleration sensor is installed inside the housing.
The head mounted display device of claim 1, wherein the display and the optical system include a first display, a first optical system, a second display, and a second optical system corresponding to the left and right eyes of the user.
The head mounted display device of claim 7, further comprising a processor configured to provide an image to the first display and the second display, and an external source configured to provide an image signal to the processor.
The head mounted display device of claim 8, wherein the external source is portable and includes a memory in which a source image is stored.
delete According to claim 1, wherein the wearing portion is provided with a head band portion surrounding the head of the user and the head support portion coupled to both sides of the head band portion surrounding the user's head, the head band portion and the head support portion of the user's head A head mounted display device having an adjustment unit for adjusting the inner diameter to match the size.
delete delete delete The display apparatus of claim 1, wherein a first lens cover and a second lens cover are provided inside the housing, and a lower portion of each of the first lens cover and the second lens cover is exposed to the outside of the housing. And a knob for adjusting a gap between the lens cover and the second lens cover.
The head mounted device of claim 15, wherein the housing includes a guide bar for guiding adjustment of the first lens cover and the second lens cover, and a leaf spring for pressing and supporting the first lens cover and the second lens cover. Display device.

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