KR102628423B1 - Head mount display device for realization of virtual reality - Google Patents

Abstract

The embodiment includes a lens unit including at least one lens; and a first region and a fixing holder facing the first region, on which the lens unit is disposed, wherein the first region has a circular opening on the inside, and the second region has two planes facing each other on the inside. and an opening including two curved surfaces facing each other, and a lower portion of the second region including a support plate extending in a direction perpendicular to the optical axis of the lens unit.

Description

Head mounted display device for implementing virtual reality {HEAD MOUNT DISPLAY DEVICE FOR REALIZATION OF VIRTUAL REALITY}

The embodiment relates to an optical device and a display device including the same, and more specifically, to a head-mounted display device for implementing virtual reality.

A head-mounted display device for implementing virtual reality is a device that allows a user to watch images by wearing it like glasses, and is also referred to by terms such as head mounted display (Head Mounted Display) or FMD (Face Mounted Display).

These glasses-type monitors were initially developed for military use and began to be used for military purposes, but their use gradually expanded to civilian use as well due to various factors such as higher performance and miniaturization of computer systems, development of display devices such as LCDs, and advancements in video and communication technology. It is becoming.

In particular, with the development of wearable computers and smartphones, it is expected that the spread of glasses-type monitors as personal display devices for wearable computers will gradually increase.

In a head-mounted display for implementing virtual reality, the embodiment seeks to secure resolution without distortion of the image delivered to the user and accurately focus the image according to the user's eyesight or the distance between the eyes.

The embodiment includes a lens unit including at least one lens; and a first region and a fixing holder facing the first region, on which the lens unit is disposed, wherein the first region has a circular opening on the inside, and the second region has two planes facing each other on the inside. and an opening including two curved surfaces facing each other, and a lower portion of the second region including a support plate extending in a direction perpendicular to the optical axis of the lens unit.

The lens unit may be fixed to the lens movement unit, and a first thread may be provided to protrude from a lower portion of the outer peripheral surface of the lens movement unit.

A second thread may be provided on the inner peripheral surface of the fixing holder in an inverse phase of the first thread.

The support plate may have a rectangular shape in which the length in the horizontal direction is greater than the length in the vertical direction.

It may further include a sliding bar protruding from the outer surface of the second area.

It may further include a fixing unit that couples the support plate and the panel.

The fixing unit may seal and secure the lower portion of the second area of the fixing holder and the edge of the panel.

It may further include a protection unit provided at the lower part of the panel.

It may further include a circuit board banded to the protection unit.

It further includes a first cable that supplies a driving signal to the panel and a second cable that supplies current to the lens device, and at least one of the first cable and the second cable may be a USB (Universal Serial Bus) type.

An optical device according to an embodiment and a head-mounted display device including the same for implementing virtual reality reduce the difference in refractive power between the display surface of the lens and the eyepiece surface, so that the image is not distorted for the user when using the optical system, and the center thickness of the lens is reduced. By adjusting the ratio of the thickness to the surrounding area, it is easy to correct aberration of the optical system, resolution is secured by securing an eye motion box, and the image can be accurately focused by moving the lens according to the eyesight of the average user. there is.

1A and 1B are perspective views of an embodiment of a head-mounted display device for implementing virtual reality;
Figure 2 is an exploded perspective view of the optical device of Figure 1;
3A and 3B are perspective and rear views of the optical device of FIG. 1;
3C and 3D are views showing openings in the first and second areas of the fixed holder;
Figure 4 is a detailed view showing the lens and panel of Figure 1;
5A and 5B are diagrams showing optical paths of the first and second embodiments of the lens and panel.
FIG. 6 is a detailed view of the eye motion box in FIG. 4;
Figure 7a is a diagram showing the structure of the lens of Figure 4 in detail,
FIG. 7B is a detailed view of the second area of FIG. 7A;
Figure 8 is a diagram showing another embodiment of the lens and panel of Figure 1;
FIG. 9 is a diagram showing the relationship between the radius of curvature and height of the lens of FIG. 8.

Hereinafter, embodiments of the present invention that can specifically realize the above object will be described with reference to the attached drawings.

In the description of the embodiment according to the present invention, in the case where each element is described as being formed "on or under", (or under) includes both elements that are in direct contact with each other or one or more other elements that are formed (indirectly) between the two elements. Additionally, when expressed as “on or under,” it can include not only the upward direction but also the downward direction based on one element.

1A and 1B are perspective views of an embodiment of a head-mounted display device for implementing virtual reality.

The head-mounted display device 10 for implementing virtual reality according to an embodiment may include a main body 12 and a pair of optical devices 1000 disposed on the main body frame 12.

A pair of optical devices 1000 are disposed on one side of the main body 12, and a first support unit 14 supported by the wearer's nose is disposed between the pair of optical devices 1000, and the main body 12 A side shield 13 may be disposed at the edge of the , and a front shield 11 may be disposed on the other side of the main body 12. Due to the action of the front shield 11 and the side shield 130, a user wearing the head-mounted display device 10 for virtual reality can only see the image displayed on the panel without external light flowing in. there is.

Since the body 12 acts as a frame of the head-mounted display device 10 for implementing virtual reality, it may be made of a material that is strong and unbreakable, for example, metal or ceramic.

The front shield 11 provided on the other side of the main body 12, the front, and the side shield 13 provided on one side of the main body 12 may be provided with a material and shape that can shield light from the outside. there is. In particular, a groove (g) is formed in the side shield 13 so that it can be supported by the wearer's nose.

Outside the pair of optical devices 1000, a second support unit 15 may be disposed, connected to the main body 12 or the side shield 13 and supported by the wearer's ears.

The first cable 16 may be connected to the optical device 1000 and may supply a driving signal, etc. to a later-described panel within the optical device 1000.

The second cable 18 may be connected to the main body 12 and may supply current from the outside to the head mounted display device 10 for implementing virtual reality. The head device optical device 10 for implementing virtual reality according to the embodiment may be implemented as lightweight by providing an external power source. The first cable 16 and the second cable 18 may be, for example, USB (Universal Serial Bus).

Figure 2 is an exploded perspective view of the optical device of Figure 1.

The optical device 1000 according to the embodiment includes a lens cover 100, a fixing ring 200, a lens 300, a lens movement unit 400, a stopper 500, and a holder. , 600), a fixing unit 700, a panel 800, and a protection unit 900.

The lens 300 will be described in detail later in FIG. 4, etc. The lenses 300 may be provided in at least one number, and in the illustrated embodiment, at least a portion of one lens 300 may be inserted into and fixed to the lens moving unit 400. A plurality of lenses 300 may be provided to form a lens unit.

A fixing ring 200 may be placed at the edge of the lens 300 inserted into the lens moving unit 400. The fixing ring 200 is located between the edge of the lens 300 and the lens moving unit 400. It is possible to prevent the lens 300 from being separated from the lens movement unit 400 .

The lens cover 100 disposed in front of the lens 300 can prevent foreign substances from sticking to the surface of the lens 300 or scratches, etc., and is a head-mounted display device for implementing virtual reality. When using (10), it can be separated from the optical device (1000).

A plurality of patterns 410 may be disposed on the outer peripheral surface of the lens movement unit 400. The patterns 410 may have a protruding or depressed shape on the surface of the lens movement unit 400. The above pattern 410 can be used when the wearer rotates the lens movement unit 400 to approach or move away from the holder 600, and thus occurs in the panel 800 and causes the lens ( The image transmitted through 300) can be accurately focused on the wearer's pupil (iris).

The above-described pattern 410 may be provided on the upper portion of the outer peripheral surface of the lens moving unit 400, and the first thread 420 may be provided in a protruding shape on the lower portion of the outer peripheral surface of the lens moving unit 400.

The holder 600 may be a housing of the optical device 1000, and at least a portion may be provided in the shape of a body tube, and the second thread 620 may be provided in a recessed upper portion of the inner peripheral surface. . The second thread 620 is provided in the reverse image of the above-described first thread 420, so that when the lens movement unit 400 is rotated in the first direction, the lens movement unit 400 is gradually inserted into the holder 600 and the lens 300 can approach the panel 800, which will be described later, and when the lens movement unit 400 is rotated in the second direction, the lens movement unit 400 is gradually separated from the holder 600 and the lens 300 is moved to the panel. You can move away from (800).

The stopper 500 may be fixed to the stopper 500 and placed between the edge of the holder 600 and the edge of the lens movement unit 400. The diameter of the inner peripheral surface of the stopper 500 is smaller than the diameter of the outer peripheral surface of the first thread 420 on the outer peripheral surface of the lens moving unit 400, so that even if the lens moving unit 400 continues to rotate in the second direction, , it is possible to prevent the lens movement unit 400 from being separated from the holder 600.

The lower surface of the holder 600 may be provided in the shape of a support plate (630), and this shape may facilitate coupling with the panel 800. The support plate 630 may be arranged in a direction perpendicular to the optical axis of the lens 300. The support plate 630 may have a rectangular shape in which the horizontal length is greater than the vertical length, and the shape of the support plate 630 may vary depending on the shape of the panel 800 or the fixing unit 700.

A pair of sliding bars 650 are provided inside the support plate 630 of the holder 600, and the sliding bars 650 protrude from both sides of the support plate 630. The sliding bar 650 is inserted into a through hole (not shown) inside the support plate 630, and the position of the lens unit 1000 can be moved by moving the support plate 630 with respect to the sliding bar 650. there is. The position movement function of the lens unit 1000 with respect to the sliding bar 650 described above can adjust the distance between a pair of lens units 1000 according to the width between the wearer's eyebrows.

A panel 800 may be placed below the holder 600. The panel 800 may display moving images or still images and may be, for example, a liquid crystal display (LCD). The panel 800 may be fixed to the lower part of the holder 600 through a fixing unit 700, and the fixing unit 700 may be, for example, double-sided tape.

Since the fixing unit 700 seals and secures the lower portion of the second area of the fixing holder 600 and the edge of the panel 800, it can block external light from entering the optical device 1000.

To allow the image of the panel 800 to be transmitted in the direction of the lens 300, the fixing member 700 may be open in the central area and provided only in the border area. Also, the central area at the bottom of the holder 600 is open, so that the image of the panel 800 can be transmitted in the direction of the lens 300.

The panel 800 may include a light source, and the light source may be, for example, a light emitting diode.

A protection unit 900 may be provided at the bottom of the panel 800, and may support the panel 800 and fix an FPCB (flexible printed circuit board (not shown)) of the panel 800.

3A and 3B are perspective and rear views of the optical device of FIG. 1.

In FIG. 3A, the holder 600 includes a support plate 630 and a sliding bar 650 exposed on both sides of the support plate, and the lens movement unit 400 is inserted and disposed in the holder 600, and the lens movement unit 400 ) and a stopper 500 is placed at the edge of the coupling area of the holder 600. A plurality of patterns 410 are provided on the outer peripheral surface of the lens movement unit 400, and a fixing ring 200 is disposed at the edge of the lens 300 inserted into the lens movement unit 400.

Although not shown, the panel 800 described above is fixed to the lower surface of the holder 600 by the fixing member 700, and the circuit is connected to the edge of the protection unit 900 (not shown) below the panel 800. The board 850 is being bent, and the circuit board 850 may be, for example, a flexible printed circuit board (FPCB).

Since the head-mounted display device 10 for implementing virtual reality described above is provided with a pair of optical devices 1000, a pair of lenses 300 and a pair of panels 800 may be provided. When a pair of lenses 300 is called a first lens and a second lens, and a pair of panels 800 is called a first panel and a second panel, the image of the first panel is output through the first lens. , the image of the second panel may be output through the second lens.

3C and 3D are views showing openings in the first and second areas of the fixing holder.

The area where the lens is placed in the fixing holder 600 may be referred to as a first area, and a hollow opening may be formed in the fixing holder 600 in the first area. The area of the fixing holder 600 in the direction of the panel may be referred to as a second area, and a hollow opening may be formed in the fixing holder 600 in the second area as well.

Since the shape of the panel may be square as described above, a portion of the effective area where the image on the panel can be output may be blocked and the image may be incident on the lens. Specifically, when the image from the panel image passes through the hollow of the second area of the fixed holder 600, some of the image may be obscured or blocked in four parts corresponding to the corner points of the effective area of the square-shaped image. This is because the shape of the hollow in the second area is different from the shape of the image of the panel.

As shown, the opening in the second area may have the shape of two planes facing each other and two curved surfaces facing each other.

FIG. 4 is a detailed view showing the lens and panel of FIG. 1.

One embodiment of the lens 300 according to the embodiment includes a first surface (S1) and a second surface (S2) facing each other, where the first surface (S1) is an observer, i.e. a head-mounted display for virtual reality implementation. The surface of the lens 300 is in the direction of the pupil (Iris) of the user of the device 1000, and the second surface S2 is the surface of the lens 300 in the direction of the panel 800. The lens 300 and panel 800 may be referred to as ‘optical devices.’

For example, the lens 300 may be made of a plastic-based material that has a refractive index of 1.5465 for light in the wavelength range of 546 nanometers.

As shown, the pupil and the lens 300 are arranged to be spaced apart, and the separation distance is not fixed and may vary. The distance between the lens 300 and the panel 800 is also spaced apart, and the separation distance is not fixed and may vary. As described above, this function can be implemented by engaging the first and second threads 420 and 620 of the lens movement unit 400 and the holder 600 and rotating them in the first or second direction.

The first surface S1 and the second surface S2 may be surfaces on an effective mirror through which an image of the imaging unit of the panel can be transmitted.

The first surface S1 and the second surface S2 may each have a convex shape and may not have an inflection point. At this time, the area that does not have an inflection point is the effective diameter of the first surface (S1) and the second surface (S2) of the lens 300, and an inflection point may be formed in an area other than the effective diameter. Here, the effective diameter may refer to the range of the path along which light passes when the image emitted from the panel 800 progresses to the pupil.

Sag 1 and Sag 2 can be regarded as the height of the peripheral area with respect to the center of the first surface (S1) and the height of the peripheral area with respect to the center of the second surface (S2) within the effective diameter of the lens 300, respectively, At this time, the lens 300 can satisfy Equation 1 below.

<Equation 1>

0.5＜│Sag 2/Sag 1│＜2

Equation 1 relates to the ratio of the refractive power of the first surface (S1), which is the eyepiece surface, of the lens 300, and the second surface (S2), which is the display surface. The refractive power of the eyepiece surface is set relatively weak, and the display surface and the display surface are set to be relatively weak. This is to create optimal conditions for users when using optical systems by reducing the difference in refractive power between the eyepiece and the eyepiece. If it is outside the range of Equation 1, the image through the lens 300 may be distorted, causing dizziness or motion sickness to the user observing the image.

In FIG. 4, when the direction of the optical axis of the lens is referred to as the x-axis and the direction perpendicular to the optical axis is referred to as the y _- axis, Sag 1 is the first It may be the distance on the x-axis to the peripheral area of the surface S1, and Sag 2 is x from the center C _s2 of the second surface S2 of the lens 300 to the peripheral area of the second surface S2. It can be an on-axis distance.

When CT and ET are the thicknesses of the center and peripheral areas of the lens 300, respectively, the lens 300 can satisfy Equation 2 below.

<Equation 2>

3＜CT/ET＜7

CT is the thickness of the center of the lens 300 and is constant, and ET is the thickness of the peripheral area of the lens 300 and may vary depending on the location of the peripheral area. Each unit may be millimeters.

Equation 2 refers to the ratio of the central thickness of the lens 300 to the peripheral thickness, and if it is outside the range of Equation 2, it may be difficult to correct aberration of the optical system when manufacturing the lens 300.

When EFL is the effective focal length of the lens 300, the lens 300 can satisfy Equation 3 below.

<Equation 3>

21＜EFL

If it is outside the range of Equation 3, a virtual image cannot be realized using the lens 300 and an eye motion box cannot be secured, so resolution may be deteriorated, and the unit may be millimeters. The eye motion box will be described later with reference to FIG. 6.

When EPD is the size of the effective diameter of the lens 300, the lens 300 can satisfy Equation 4 below, and the unit of EPD can be millimeters.

<Equation 4>

25＜EPD＜65

When the size of the image plane S1 is called IH (Image height), IH can satisfy Equation 5 below. As shown, IH can be the size of the image displayed on the panel, and the unit of IH is It could be millimeters.

<Equation 5>

18＜IH＜40

When the distance from the center (Cs1) of the first surface (S1) of the lens to the image surface of the panel is TTL, the lens 300 can satisfy Equation 6 below and the unit can be millimeters.

<Equation 6>

25＜TTL＜40

When E.R (Eye Relief) is the distance (in millimeters) from the pupil to the first surface (S1) of the lens 300, the lens 300 can satisfy Equation 7 below.

Equations 6 and 7 are equations related to the movement section of the lens 300, and if it is within the range of Equations 6 and 7, the lens 300 can be moved to match the visual acuity of a typical user to accurately focus the image.

<Equation 7>

8＜E.R＜15

5A and 5B are diagrams showing optical paths of the first and second embodiments of the lens and panel. The positional relationship between the lens 300, the pupil (Iris), and the panel 800 follows the range described in FIG. 4, etc.

Table 1 shows the characteristics of the first and second embodiments of the lens and panel.

Example 1 Example 2 Sag 1 2.236 2.562 Sag 2 -4.104 -4.009 CT 7.5 7.7 Et 1.15 1.23 EFL 28.69 26.95 E.R. 10 10 E.P.D. 14.35 14.35 IH 19.08 19.08 TTL 34.5 32 │Sag 2/Sag 1│ 1.83542 1.564793 CT/ET 6.521739 6.260163 EFL 28.69 26.95 TTL 34.5 32

The shape and arrangement of the lenses and panels according to the above-described first and second embodiments satisfy Equations 1, 2, 3, and 6, so that a virtual image can be accurately implemented as described above.

Tables 2 and 3 show the aspherical coefficients of lenses according to the first and second embodiments, respectively.

S1 (side 1) S2 (side 2) R 41.96977 -23.4507 K 0 -10.3176 A -1.66E-05 -5.76E-05 B 4.72E-08 -1.32E-07

S1 (side 1) S2 (side 2) R 40.44082 -21.602 K 0 0.495277 A 3.72E-05 5.70E-05 B -2.00E-07 -2.28E-07 C 4.35E-09 D -2.44E-11 E 3.66E-14

FIG. 6 is a diagram showing the eye motion box in FIG. 4 in detail.

Let the size of the panel 800 be S, the size of the effective diameter of the lens 300 be D, and the size of the pupil be E, the distance between the pupil and the lens 300 is Le, and the distance between the pupil and the lens 300 is Le, and the When the distance between and the panel 800 is F, the relationship in Equation 8 below can be established.

<Equation 8>

E=D-{(Le×S)/F}

E can be said to be the size of the eye motion box, and from Equation 8, to increase the size of the eye motion box, the size D of the effective diameter of the lens 300 must increase, the size of the panel 800 must be decreased by S, or the pupil The distance between the lens 300 and the lens 300 may need to decrease, or the distance between the lens 300 and the panel 800, F may need to increase.

In the first and second embodiments described above, the sizes of the iMotion box may be 15.4 and 14.5, respectively.

FIG. 7A is a diagram showing the structure of the lens of FIG. 4 in detail, and FIG. 7B is a diagram showing the second area of FIG. 7A in detail.

In FIG. 7A, the area of the effective diameter through which the light passing through the image of the panel described above from the lens 300 passes may be referred to as a first area (region 1), and the outer area may be referred to as a second area (region 2). The diameter R1 of the first region (region 1) of the first surface (S1) of the lens 300 may be the same as the diameter (R2) of the first region (region 1) of the second surface (S2) of the lens 300. , may be smaller than the overall diameter (R3) of the lens 300 including the second region (region 2).

In Figure 7b, the second region (region 2) is the 31st side (S31), the 32nd side (S32), the 33rd side (S33), the 34th side (S34), the 35th side (S35), and the 36th side. It includes (S36), the 37th side (S37), the 38th side (S38), and the 39th side (S39).

The directions of the 31st to 39th surfaces S31 to S39 follow the directions shown in the x-axis and y-axis in FIG. 7A.

The 31st side (S31) may extend in the y-axis direction from the end of the first side (S1), and the 32nd side (S32) may extend in the x-axis direction from the end of the 31st side (S31), The 33rd side (S33) may extend in the y-axis direction from the end of the 32nd side (S32), and the 34th side (S34) may extend in the x-axis direction from the end of the 33rd side (S33), The 35th side (S35) may extend in the x-axis and -y-axis directions with an inclination from the end of the 34th side (S34), and the 36th side (S36) may extend from the end of the 35th side (S35) in the -y direction. It can extend in the axial direction, and the 37th side (S37) can extend in the x-axis direction from the end of the 36th side (S36), and the 38th side (S38) can extend from the end of the 37th side (S37) - It may extend in the y-axis direction, and the 39th surface (S39) may extend with an inclination in the -x-axis and -y-axis directions from the end of the 38th surface (S38) and be connected to the second surface (S2).

In FIG. 7A, second regions (region 2) are provided on both sides of the first region (region 1), and the two second regions (region 2) are symmetrical with respect to the optical axis passing through the center of the lens 300. can be achieved.

The first region (region 1) may be a portion corresponding to the effective diameter of the lens 300, and the second region (region) may be a portion outside the effective diameter, and the lens 300 is inserted into the lens movement unit 400 in FIG. 2, etc. It may be a part that fixes the lens 300.

FIG. 8 is a diagram showing other embodiments of the lens and panel of FIG. 1.

From the left, the pupil (iris), lens 300, panel 800, and virtual image are displayed. The size of the panel 800 in the y-axis direction is referred to as η, where η may not be the physical size of the panel 800 but the size of the image surface displayed on the panel 800.

When the size of the pupil (Iris) in the y-axis direction is called β (Field of view, FOV), the distance from the center of the first surface (S1) of the lens to the image plane is called Optical length (TTL in Figure 4). can do.

At this time, reducing the optical length can reduce the volume of the optical device. In order to reduce the optical length, if η is constant in the y-axis direction of the panel 800, the size in the y-axis direction of the pupil (Iris) is set to β. The magnification can be increased by increasing the magnification, or the magnification can be increased by reducing the size of the panel 800 in the y-axis direction by η and keeping the size of the pupil (Iris) in the y-axis direction constant at β.

Table 4 is a diagram showing the third to fifth embodiments of the lens and panel shown in FIG. 8.

Example 3 Example 4 Example 5 FOV (angle of view) 80 109 80 Optical length 34 34 25.1 E.R. 10 10 10 refractive index 1.54 1.9 1.9 diameter of effective diameter 22.8 34.0 22.8 thickness of the lens 7.5 10 11 focal length of the lens 26.5 24 14.1 curvature of the lens surface 14.31 21.6 12.69 diameter of lens 25.2 36.4 25.2 Size of the second area 1.2 1.2 1.2

The optical device shown in FIG. 8 may have a viewing angle of 75 to 115 degrees, an optical length of 25 to 40 millimeters, an E.R. of 8 millimeters to 15 millimeters, and a refractive index of 1.5 to 2.0. , the effective diameter of the lens 300 may be 22 millimeters to 35 millimeters, the thickness of the lens 300 may be 7 millimeters to 15 millimeters, the focal length of the lens may be 14 millimeters to 30 millimeters, and the lens surface The curvature may be 12 to 22, and the diameter of the lens 300 may be 1.2 millimeters larger on both sides than the diameter of the effective diameter of the lens 300.

FIG. 9 is a diagram showing the relationship between the radius of curvature and height of the lens of FIG. 8.

In Figure 9, as the height of the lens increases, the radius of curvature increases. Here, the height of the lens is the same as that indicated as Sag 1 or Sag 2 in FIG. 4. As the radius of curvature increases, the curvature of the lens decreases, making the surface flat and closer to a plane. As the radius of curvature decreases, the curvature of the lens increases.

That is, as the height Sag 1 or Sag 2 from the center on the first and second surfaces of the lens increases, the curvature of the surface of the lens may further increase.

A head-mounted display device for implementing virtual reality equipped with the above-mentioned optical device receives a signal of an image displayed on an external device, such as a smartphone, laptop, or smart TV, and allows the user to display a 3D or 2D image on the head. You can observe by wearing an attached display device.

Although the above description focuses on the examples, this is only an example and does not limit the present invention, and those skilled in the art will be able to You will see that various variations and applications are possible. For example, each component specifically shown in the examples can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

10: Head-mounted display device for virtual reality implementation
11: Front shield 12: Main body
13: side shield 14: first support unit
15: second support unit 16: first cable
18: second cable 100: lens cover
200: Lens ring 300: Lens
400: Lens movement unit 410: Pattern
420: first thread 500: spotter
600: fixing holder 620: second thread
630: support plate 650: sliding unit
700: Fixed unit 800: Panel
850: circuit board 900: protection unit
100: optical device

Claims (10)

A lens unit including at least one lens;
a fixing holder on which the lens unit is disposed;
A panel that displays video; and
It includes a fixing unit that couples the support plate and the panel,
The fixing holder includes a first area and a second area where the lens is disposed, the first area has a circular opening therein, and the second area has two planes facing each other inside. Having an opening including two curved surfaces,
A lower portion of the second region includes a support plate extending in a direction perpendicular to the optical axis of the lens unit,
A pair of sliding bars are provided inside the support plate, and the sliding bars protrude on both sides of the support plate,
The fixing unit seals and secures the lower part of the second area of the fixing holder and the edge of the panel,
The fixing unit has an open central area and is provided only in the border area, and the central area is open at the bottom of the fixing holder,
The lens includes a first surface and a second surface facing each other,
Within the effective diameter of the lens, when the height of the peripheral area with respect to the center of the first surface and the height of the peripheral area with respect to the center of the second surface are Sag 1 and Sag 2, respectively,
A head-mounted display device for implementing virtual reality that satisfies the following equation 1,
<Equation 1> 0.5＜│Sag 2/Sag 1│＜2. According to claim 1,
The lens unit is fixed to a lens movement unit, and a first thread protrudes from a lower portion of the outer peripheral surface of the lens movement unit,
A head-mounted display device for implementing virtual reality, wherein a second thread is provided on an inner peripheral surface of the fixing holder in an inverse phase of the first thread. According to claim 1 or 2,
The support plate is a head-mounted display device for implementing virtual reality, wherein the support plate has a rectangular shape with a horizontal length greater than a vertical length. According to claim 1 or 2,
A head-mounted display device for implementing virtual reality, further comprising a sliding bar protruding from an outer surface of the second area. delete According to claim 1,
a protection unit provided at the bottom of the panel; and
A head-mounted display device for implementing virtual reality, further comprising a circuit board banded to the protection unit. According to claim 1,
It further includes a first cable for supplying a driving signal to the panel and a second cable for supplying current to the head mounted display device, and at least one of the first cable and the second cable is a USB (Universal Serial Bus) type. Head-mounted display device for virtual reality implementation. delete delete delete

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