KR102398506B1 - Wearable display apparatus - Google Patents

Abstract

An embodiment of the wearable display device includes: a first prism positioned in front of the user's eyeball and controlling a path of light reaching the eyeball so that an image displayed on the eyeball arrives; and a second prism coupled to the first prism, wherein at least one surface of each surface coupled to the first prism and the second prism may be formed with an adhesive groove through which an adhesive is introduced.

Description

Wearable display device {WEARABLE DISPLAY APPARATUS}

The embodiment relates to a wearable display device having a structure that facilitates adhesion between sub-prisms and the adhesive does not adversely affect the path of light passing through the prisms.

The content described in this section merely provides background information for the embodiment and does not constitute the prior art.

A wearable display device such as a head mounted display (HMD) is a device that was created to allow a pilot to know flight information such as an airplane's altitude and speed. General commercial products were developed in the 1990s, and commercial products have been released since 1997, attracting a lot of attention.

A wearable display device is a device that is worn on the head like glasses so that an enlarged image is placed in front of the user's eyes, and the user can see it. Optical technology is applied, so you can see a magnified screen close to 100 times.

With the development and commercialization of peripheral devices such as wearable display devices, the wearable computing industry is also expected to grow. Until now, wearable display devices have been mainly developed to enjoy movies and games, but recently, research and development as wearable monitors have been conducted due to the rapid development of display devices and image communication technologies represented by high performance and miniaturization of computer systems, LCD, LED, etc. and commercialized products have been released.

The wearable display device market has suffered a lot in the past due to its relatively high price, but it is expected to grow significantly by riding on the wearable computer industry. Wearable display devices are expected to be expanded to industrial sites, maintenance sites for large equipment such as automobiles, aircraft, and ships, logistics warehouses, etc., as well as sports entertainment fields such as automobile racing.

In particular, the development of processor and software technology enables the miniaturization of computing devices, and the wearable display device is expected to develop into a personal computing device such as a smart phone rather than a device that simply displays an image.

In the wearable display device, the light reaching the user's eye forms a predetermined path, and maintaining the optical path stably has a great influence on the performance of the product. In manufacturing a wearable display device by combining respective parts, a prism through which light incident to a user's eye finally passes may be formed of a plurality of sub-prisms and may be coupled to each other by an adhesive.

When the adhesive flows down to a site other than the required bonding site during bonding between the sub-prisms by the adhesive, the light passing through the prism may be affected, which in turn may adversely affect the performance of the wearable display device.

Accordingly, an object of the embodiment is to provide a wearable display device having a structure that facilitates adhesion between sub-prisms and the adhesive does not adversely affect the path of light passing through the prisms.

The technical task to be achieved by the embodiment is not limited to the technical task mentioned above, and other technical tasks not mentioned will be clearly understood by those of ordinary skill in the art to which the embodiment belongs from the description below.

An embodiment of the wearable display device includes: a first prism positioned in front of the user's eyeball and controlling a path of light reaching the eyeball so that an image displayed on the eyeball arrives; and a second prism coupled to the first prism, wherein at least one surface of each surface coupled to the first prism and the second prism may be formed with an adhesive groove through which an adhesive is introduced.

The adhesive groove may be formed on the surface of the first prism or on the surface of the second prism.

The adhesive grooves may be formed in each of the first prism and the second prism, and each of the adhesive grooves may be disposed to face each other.

In one embodiment of the wearable display device, incident light for implementing an image displayed on the eyeball is totally reflected on a second surface formed on the second prism at a portion where the first prism and the second prism are coupled to each other, The adhesive groove may be formed in a portion that avoids a portion of total reflection of the incident light.

The adhesive groove portion may be formed at an edge portion of a first surface to which the first prism is coupled to the second surface or an edge of the second surface of the second prism.

The first surface and the second surface may be inclined in a forward direction of the user's eyeball, and the adhesive groove may have a longitudinal direction formed in an inclined direction of the first surface or the second surface.

The adhesive groove portion may be formed as a continuous groove in which one side is open in the longitudinal direction and the other side is closed.

The adhesive groove portion is formed of a plurality of grooves that do not communicate with each other on the first surface or the second surface, and the plurality of grooves are spaced apart from each other and disposed in an inclined direction of the first surface or the second surface. it may be

The adhesive groove portion may include: a first adhesive groove formed as a continuous groove in which one side is opened in the longitudinal direction and the other side is closed; and a plurality of grooves formed on the first surface or the second surface that do not communicate with each other, wherein the plurality of grooves are spaced apart from each other and disposed in an inclined direction of the first surface or the second surface. It may include two adhesive grooves.

The adhesive groove portion may be provided in at least one of a square, V-shaped, and curved cross-section with one side open.

Another embodiment of the wearable display device includes: a first prism positioned in front of the user's eyeball and controlling a path of light reaching the eyeball so that an image displayed on the eyeball arrives; and a second prism that combines with the first prism to reduce distortion of an actual image reaching the user's eye, wherein the first prism has a first surface coupled to the second prism, the second prism includes A second surface coupled to the first prism may be formed, and an adhesive groove into which an adhesive is introduced may be formed in at least one of the first surface and the second surface.

The bonding groove portion may be formed on each of the first surface and the second surface, and each of the bonding groove portions may be disposed to face each other.

A space may be formed in a central portion of the coupling portion between the first surface and the second surface, and the adhesive groove portion may be formed at an edge.

In an embodiment, since the adhesive groove is formed on the surface of the first prism or the second prism, there is an effect that the first prism and the second prism can be easily and firmly bonded to each other with an adhesive.

In addition, the adhesive groove portion to improve the screen resolution and sharpness of the wearable display device by preventing the adhesive from flowing into the central portion of each surface where the first prism and the second prism are coupled to each other to form an optical path or where total reflection occurs. can

1 is a perspective view illustrating a wearable display device according to an embodiment.
2 is an exploded perspective view illustrating a wearable display device according to an embodiment.
3 is a plan view illustrating a path of light forming an image in a wearable display device according to an exemplary embodiment.
4 is a perspective view illustrating a state in which an adhesive groove is formed in a first prism according to an embodiment.
5 is a perspective view illustrating a state in which an adhesive groove is formed in a first prism according to another embodiment.
6 is a perspective view illustrating a state in which an adhesive groove is formed in a second prism according to an exemplary embodiment.
7 is a front view illustrating a state in which an adhesive groove is formed in a second prism according to another embodiment.
8 is a front view illustrating a state in which an adhesive groove is formed in a second prism according to another embodiment.
9 is a perspective view illustrating a portion of a wearable display device having an adhesive groove formed thereon according to an exemplary embodiment.
10 is a perspective view illustrating a portion of a wearable display device having an adhesive groove formed thereon according to another embodiment.
11 is a perspective view illustrating a portion of a wearable display device having an adhesive groove formed thereon according to another embodiment.
12 is a diagram illustrating a state in which a display screen is formed according to an exemplary embodiment.

Hereinafter, an embodiment will be described in detail with reference to the accompanying drawings. Since the embodiment may have various changes and may have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the embodiment to a specific disclosed form, and it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the embodiment. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

Terms such as “first” and “second” may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. In addition, terms specifically defined in consideration of the configuration and operation of the embodiment are only for describing the embodiment, and do not limit the scope of the embodiment.

In the description of the embodiment, in the case where it is described as being formed in "up (up)" or "below (on or under)" of each element, on (on or under) ) includes both elements in which two elements are in direct contact with each other or one or more other elements are disposed between the two elements indirectly. In addition, when expressed as “up (up)” or “down (on or under)”, the meaning of not only the upward direction but also the downward direction based on one element may be included.

Also, as used hereinafter, relational terms such as "upper/upper/above" and "lower/lower/below" etc. do not necessarily require or imply any physical or logical relationship or order between such entities or elements; It may be used only to distinguish one entity or element from another entity or element.

In addition, a Cartesian coordinate system (x, y, z) may be used in the drawings. In the drawings, the x-axis and y-axis mean a plane perpendicular to the optical axis. For convenience, the optical-axis direction (z-axis direction) may be referred to as the first direction, the x-axis direction as the second direction, and the y-axis direction as the third direction. .

The wearable display device of the embodiment is a device that can be worn like glasses in a human body, and a human can view an image transmitted from an external device relatively without restriction in a place. A device serving as a source for transmitting an image may be a smartphone or other mobile device, and may be connected to the wearable display device by wire or wirelessly.

In this case, in order to wear the wearable display device of the embodiment, it may be detachably coupled to the glasses, or a separate wearing device that the user can wear like glasses may be coupled.

1 is a perspective view illustrating a wearable display device according to an embodiment. 2 is an exploded perspective view illustrating a wearable display device according to an embodiment. 3 is a plan view illustrating an optical path of light forming an image in a wearable display device according to an exemplary embodiment.

The wearable display device of the embodiment includes a light source unit 10 , a light guide unit 11 , a beam injection unit 12 , a display unit 13 , a polarizer 14 , a lens 15 , a first prism 16 , and a second prism (17) may be included.

In addition, the wearable display device of the embodiment may include a base 18 , a cover member 19 , and a fastening unit 22 to combine each of the above components into a single bundle. In addition, the wearable display device of the embodiment may include a printed circuit board 20 and a connector 21 to be electrically connected to an external device and to receive an image to be reproduced from the external device.

The light source unit 10 is electrically connected to the printed circuit board 20 , and serves to first irradiate an image to be reproduced received from an external device through the printed circuit board 20 in the form of light. The light source unit 10 is a device for irradiating light and may be configured with various materials, for example, may be configured using an LED having excellent durability, low heat generation, and small size.

The light guide unit 11 may serve to adjust an optical path so that the image irradiated from the light source unit 10 is directed to the beam ejection unit 12 . As shown in FIG. 3 , when viewed from the center of the light guide unit 11 , the light source unit 10 and the beam ejection unit 12 are located approximately at right angles to each other. Therefore, in order to direct the light forming the image irradiated from the light source unit 10 to the beam ejection unit 12, the light guide unit 11 may be provided with a plurality of gratings provided at appropriate positions and at appropriate angles therein. there is.

Also, the light guide unit 11 may serve to uniformly distribute the light irradiated from the light source unit 10 to the beam distributing unit 12 due to the formation of the grating. Accordingly, the light uniformly irradiated from the light guide unit 11 may be uniformly incident on the surface of the beam ejection unit 12 adjacent to the light guide unit 11 .

The beam injector 12 irradiates the light incident from the light guide unit 11 to the display unit 13 , and receives the image reproduced from the display unit 13 so that the user can see it in detail with the naked eye again, and receives the lens (15) can serve as an investigation.

That is, the beam emitting unit 12 transmits light to the display unit 13 or receives light for forming a reproduced image from the display unit 13 , and receives the reproduced light transmitted from the display unit 13 . The path of light forming an image can be adjusted.

In order to form such an optical path, the beam splitter 12 may be formed of, for example, a polarizing beam splitter (PBS). The polarized beam splitter may be manufactured by combining a plurality of gratings, and forming a coating layer 100 capable of reflecting and/or diffracting light on each grating.

The display unit 13 plays a role of reproducing the light incident from the beam ejection unit 12 as an image in which the user can specifically detect the shape with the naked eye. The display unit 13 may be, for example, a reflective display that irradiates the reproduced image to the beam injector 12 again.

Such a reflective display has, for example, an Lcos type. The Lcos method is a method of reproducing an image by reflecting incident light as a reflective display. In the Lcos method, a silicon substrate is mainly used as a display element, and high-resolution images can be displayed on a small display screen.

The polarizing plate 14 may serve to polarize light that forms an image incident from the display unit 13 . The polarizing plate 14 may serve to transmit the p-wave light and absorb the s-wave among light components that form an incident image.

In this case, the p wave is a light wave that vibrates in a direction horizontal to the incident plane of light, and the s wave is a light wave that vibrates in a direction perpendicular to the incident plane of the light. In this case, the incident plane refers to a plane formed by an incident wave, a reflected wave, and a transmitted wave in a medium on which light is incident.

Since the polarizing plate 14 transmits only the p-wave light among the incident lights, the light passing through the polarizing plate 14 and incident to the lens 15 has only the p-wave component. Of course, on the contrary, by using a different type of polarizing plate 14, light passing through the polarizing plate 14 and incident to the lens 15 may have only the s-wave component.

The polarizing plate 14 prevents the image quality from being deteriorated due to the fact that the light forming the incident image has a p-wave component and an s-wave component at the same time, and the light of the p-wave component and the light of the s-wave component interfere with each other. can be prevented

On the other hand, the light guide unit 11 also has a polarization function, similarly to the polarizing plate 14, and polarizes the light incident from the light source unit 10 so that the p-wave component light and the s-wave component light interfere with each other. It can also prevent the image quality from being deteriorated.

The lens 15 may receive light that forms an image incident from the polarizer 14 and enlarge the image. That is, the image formed by the light incident from the polarizing plate 14 is very small, so it is inconvenient for the user to view the image as it is. Accordingly, the lens 15 may serve to enlarge the image to a size suitable for the user to view with the naked eye.

In addition, the lens 15 may serve to correct chromatic aberration, spherical aberration, etc. of the incident light, refract the incident light to change the optical path, and It is also possible to increase the resolution of the image to be formed.

Light passing through the lens 15 and forming an enlarged image is incident on the first prism 16 . In this case, in order to properly adjust the optical path incident from the lens 15 to the first prism 16 , a refraction part may be formed in a part of the lens 15 if necessary. Such a refractive portion may be formed by, for example, combining a medium having a different density with other portions of the lens 15 .

The first prism 16 may serve to bring the image transmitted from the lens 15 to the user's eye E. For this, the path of the light that forms an image incident from the lens 15 must be appropriately adjusted. Adjustment of this optical path uses the phenomenon of total reflection in the first prism 16, and in order to control the final optical path incident on the user's eye (E), a reflective layer 200, which will be described later, is applied to the first It may be formed on the prism 16 .

At this time, the image passing through the first prism 16 from the lens 15 and incident on the user's eye E is a virtual image. That is, unlike the real image, which refers to the image of the real object located in front of the user's eye (E), the image reproduced on the display unit 13 not located in front of the user's eye (E) is a sight as described above. Because the path is adjusted, it is a virtual image that the user perceives visually as if it is located in front of the user's eyeball E.

An optical path for forming a virtual image in the wearable display device of the embodiment is as shown in FIG. 3 . Specifically, first, the light source unit 10 electrically connected to the printed circuit board 20 receives the information of the image to be reproduced from the external device through the printed circuit board 20 and transmits the light containing the image to the light guide unit ( 11) is investigated. In this case, the light irradiated from the light source unit 10 may contain an RGB signal.

Next, the light guide unit 11 directs the light incident from the light source unit 10 to the beam ejection unit 12 by adjusting the optical path. In this case, the light guide unit 11 may serve to uniformly distribute the light irradiated from the light source unit 10 to the beam dispensing unit 12 due to the formation of the grating. In addition, the light guide unit 11 has a polarization function, so that the light incident from the light source unit 10 is polarized so that the light of the p-wave component and the light of the s-wave component interfere with each other, thereby reducing the image quality. can also be prevented.

Next, the beam injector 12 irradiates the light incident from the light guide unit 11 to the display unit 13, so that the user can visually recognize the light incident on the display unit 13 in detail. Make it possible to play back the video.

Next, the display unit 13 reproduces the light incident from the beam injector 12 as a specific image, and the light forming the reproduced image is irradiated to the beam ejector 12 again.

Next, the beam ejection unit 12 makes the light that forms an image incident from the display unit 13 incident on the polarizing plate 14 . In this case, the beam splitter 12 may be formed of a polarized beam splitter as described above for adjusting the various optical paths.

Next, the polarizing plate 14 polarizes the light that forms an image incident from the beam ejector 12 . At this time, since the light transmits only one of the p-wave and the s-wave and absorbs the remaining waves, the light passing through the polarizing plate 14 is polarized to have only one of the p-wave and the s-wave. This is to prevent image quality deterioration due to interference between the p-wave and the s-wave, as described above.

Next, the lens 15 receives the light that forms an image incident from the polarizing plate 14 and enlarges it to a size suitable for the user to see with the naked eye. In this case, as described above, a refraction portion may be formed in a portion of the lens 15 for optical path control, and light passing through the refraction portion is incident on the first prism 16 at an incident angle set.

Next, the first prism 16 may serve to irradiate the user's eye E with light that finally forms an image by adjusting the optical path of the image transmitted from the lens 15 . In this case, the adjustment of the optical path may be implemented using the total reflection phenomenon of the first prism 16 and the reflective layer 200 formed on the first prism 16 .

The second prism 17 may serve to reduce distortion of the real image reaching the user's eye E in combination with the first prism 16 . The user can simultaneously see the real image of the object in front of the user's eyeball E together with the virtual image that is the image reproduced on the display unit 13 through the first prism 16 .

However, when the user's eye E and the end of the first prism 16 are adjacent to each other, the actual image reaching the user's eye E may be distorted due to the shape of the end of the first prism 16 . This is because, due to the shape of the end of the first prism 16, refraction, diffraction, etc. of light showing a real image may occur.

Accordingly, when the second prism 17 is coupled to the end of the first prism 16 to extend the entire prism, distortion of an image due to the shape of the end of the first prism 16 can be reduced.

The base 18 has an accommodation space formed therein, and may serve to accommodate the light guide unit 11 , the beam jet unit 12 , the display unit 13 , the polarizer 14 , the lens 15 , and the like. Since the base 18 accommodates various components of the embodiment, its shape may be complicatedly formed. Therefore, the base 18 may be manufactured by a method capable of being manufactured in such a complex shape, for example, by injection molding.

The cover member 19 closes at least a portion of the upper portion of the base 18 so that each component accommodated in the base 18 can be stably accommodated in the base 18 . In addition, the cover member 19 may be coupled to the base 18 by the fastening part 22 .

In addition, a protrusion 171 is formed on the upper surface of the cover member 19, and the printed circuit board ( 20) can be combined.

Upper and lower portions of the printed circuit board 20 may be coupled to the base 18 and the cover member 19 , and may be electrically connected to the light source unit 10 and the display unit 13 . Accordingly, the printed circuit board 20 can transmit an image signal to be reproduced to the light source unit 10 , and supply necessary power to the light source unit 10 and the display unit 13 .

On the other hand, the printed circuit board 20 may be formed with grooves or holes in the upper and lower portions. Accordingly, the upper and lower portions of the printed circuit board 20 may be coupled to the protrusion 171 formed on the upper surface of the cover member 19 and the protrusion 171 formed under the base 18 , respectively.

The connector 21 may serve to connect the printed circuit board 20 and an external device. In this case, the external device may be composed of a control device for controlling the wearable display device of the embodiment, a storage device for recording images to be played back, a communication device capable of interlocking the wearable display device with a mobile device such as a smartphone, etc. .

The fastening part 22 may serve to couple the cover member 19 and the base 18 to each other. Therefore, if the fastening part 22 is inserted into a hole or groove formed in each of the cover member 19 and the base 18, the cover member 19 and the base 18 can be detachably coupled. You are free to use any For example, bolts, screws, coupling pins, etc. may be used as the fastening part 22 .

4 is a perspective view showing a state in which the adhesive groove 100 is formed in the first prism 16 according to an embodiment. 5 is a perspective view showing a state in which the adhesive groove 100 is formed in the first prism 16 according to another embodiment.

The adhesive groove portion 100 is a portion through which the adhesive flows into at least one of the surfaces where the first prism 16 and the second prism 17 are coupled to each other. The adhesive introduced into the adhesive groove 100 may be cured to couple the first prism 16 and the second prism 17 to each other.

An embodiment of the adhesive groove 100 may be formed on the surface of the first prism 16 as shown in FIGS. 4 and 5 . Specifically, the adhesive groove 100 is an edge 162 of the first surface 160 where the first prism 16 is coupled to the second surface 170 (refer to FIG. 6 ) of the second prism 17 . can be formed in

At this time, the first surface 160 is inclined in the forward direction of the user's eyeball (E), and the adhesive groove part 100 may be formed in the longitudinal direction of the first surface 160 inclined in the longitudinal direction. there is.

This is because the central part 161 of the first surface 160 is an optical path through which the light forming an image passes, so that the central part 161 does not affect the path and characteristics of the light passing through the central part 161. This is because it is appropriate not to apply an adhesive.

Meanwhile, in FIGS. 4 and 5 , the adhesive groove part 100 is provided on both sides of the edge 162 of the first surface 160 , but the present invention is not limited thereto. it might be

In addition, an embodiment of the adhesive groove 100 may be formed as a continuous groove in which one side is opened in the longitudinal direction and the other side is closed, as shown in FIGS. 4 and 5 . At this time, as shown in FIGS. 4 and 5 , when the step is formed, a groove may be formed in a part of the step so that one side of the adhesive groove part 100 is opened.

On the other hand, the open side of the adhesive groove part 100 may be formed on either the front or rear surface of the first prism 16 based on the gaze direction of the eyeball E from the first surface 160 . For example, as shown in FIG. 4 , the open side of the adhesive groove part 100 may be formed on the front surface of the first prism 16 with respect to the gaze direction of the eyeball (E). In addition, as shown in FIG. 5 , an open side of the adhesive groove part 100 may be formed on the rear surface of the first prism 16 .

The adhesive used for bonding the first prism 16 and the second prism 17 may have various properties. For example, an epoxy, a heat-curable adhesive, a photo-curable adhesive, etc. may be used, and in the case of a photo-curable adhesive, a UV-curable adhesive may be used.

6 is a perspective view showing a state in which the adhesive groove 100 is formed in the second prism 17 according to an embodiment. The adhesive groove 100 may be formed on the second surface 170 of the second prism 17 as shown in FIG. 6 . Like the first surface 160 , the second surface 170 is formed in the front direction of the eyeball E, and the adhesive groove 100 has a longitudinal direction in the inclined direction of the second surface 170 . can be formed with

Meanwhile, on the second surface 170 , incident light for realizing the image displayed on the eyeball E is totally reflected, and the adhesive groove 100 may be formed in a portion that avoids the total reflection portion of the incident light.

At this time, the total reflection of the incident light occurs in the central portion 171 of the second surface 170 of the second prism 17 , and thus the adhesive groove 100 is the second surface 170 where total reflection occurs. It may be formed in the portion of the edge 172 of the second surface 170 that avoids the central portion 171 .

Meanwhile, in FIG. 6 , the adhesive grooves 100 are provided on both edges 172 of the second surface 170 , respectively, but the present invention is not limited thereto. .

In addition, as shown in FIG. 6 , the adhesive groove 100 may be formed as a continuous groove in which one side is opened in the longitudinal direction and the other side is closed. At this time, as shown in FIG. 6 and FIG. 5 , one side of the open side may be formed to form a groove in a part of the step when the step is formed so that one side of the adhesive groove part 100 is opened.

On the other hand, as in the first prism 16 , the open side of the adhesive groove part 100 is the second prism 17 , based on the gaze direction of the eyeball E on the second surface 170 . It can be formed on either the front side or the back side. In FIG. 6 , the open side of the adhesive groove 100 is formed on the rear surface of the second prism 17 with respect to the gaze direction of the eyeball E, but may be formed on the front surface of the second prism 17 . .

Since the adhesive groove part 100 may be formed in the same or extremely similar structure to each other on the first surface 160 and the second surface 170, another embodiment of the adhesive groove part 100 in FIGS. 7 and 8 below. They show, for example, the second surface 170 of the second prism 17 .

7 is a front view showing a state in which the adhesive groove 100 is formed in the second prism 17 according to another embodiment.

Another embodiment of the adhesive groove 100 is formed with a plurality of grooves that do not communicate with each other on the first surface 160 or the second surface 170 as shown in FIG. 7 , and the plurality of grooves are They may be disposed in an inclined direction of the first surface 160 or the second surface 170 at a distance from each other. In this case, both ends of the adhesive groove 100 may be formed in a closed shape.

Adhesive is introduced into each of the plurality of grooves forming the adhesive groove portion 100, and when the adhesive is cured after the first surface 160 and the second surface 170 are butted to each other, the first prism 16 and the second The prisms 17 may be fixed to each other by an adhesive.

Although the bonding groove portions 100 having a rectangular plane are illustrated in FIG. 7 , the shape of the bonding groove portions 100 is not limited thereto, and may be provided to have a polygonal, curved, or other various cross-sections.

8 is a front view showing a state in which the adhesive groove 100 is formed in the second prism 17 according to another embodiment. As shown in FIG. 8 , in the embodiment, the adhesive groove part 100 may include a first adhesive groove part 100-1 and a second adhesive groove part 100-2.

The first adhesive groove portion 100-1 is formed as a continuous groove with one side open and the other side closed in the longitudinal direction, and the second adhesive groove portion 100-2 is formed on the first surface 160 or the second The second surface 170 is formed with a plurality of grooves that do not communicate with each other, and the plurality of grooves are spaced apart from each other and disposed in an inclined direction of the first surface 160 or the second surface 170. can

That is, in the embodiment of FIG. 8 , the adhesive groove 100 combining the embodiments shown in FIGS. 6 and 7 may be formed. In the case of the embodiment shown in FIGS. 7 and 8 , as described above, it is appropriate that the first surface 160 or the edge 172 of the second surface 170 are respectively formed.

Meanwhile, in FIGS. 7 and 8 , the adhesive groove 100 is provided on both sides of the edge 172 of the second surface 170 , but the present invention is not limited thereto. it might be

9 is a perspective view showing a portion of the wearable display device in which the adhesive groove 100 is formed according to an embodiment. As shown in FIG. 9 , the adhesive groove part 100 may be formed on the first surface 160 of the second prism 17 .

At this time, when the adhesive groove 100 has a shape as shown in FIG. 6 , that is, its longitudinal direction is formed in an inclined direction of the second surface 170 , and one side is opened in the longitudinal direction and the other side is formed. When the closed continuous groove is formed, the first prism 16 and the second prism 17 can be easily coupled to each other.

That is, after the first prism 16 and the second prism 17 are brought into contact with each other, an adhesive is introduced into the open opening of the adhesive groove 100 , and when the introduced adhesive is cured, the first prism 16 and the second The prisms 17 may be fixed to each other by an adhesive. At this time, since the opposite side of the opening is closed, there is no fear that the adhesive introduced into the adhesive groove will flow out to the opposite side of the opening.

10 is a perspective view illustrating a portion of a wearable display device in which an adhesive groove 100 is formed according to another embodiment. 11 is a perspective view illustrating a portion of a wearable display device in which an adhesive groove 100 is formed according to another embodiment.

As shown in FIG. 10 , the adhesive groove 100 may be formed on the first surface 160 of the first prism 16 , and the specific shape thereof is as described above. Also in this case, as described above in the embodiment of FIG. 9 , when the adhesive groove 100 has a shape as shown in FIG. 5 , the first prism 16 and the second prism 17 are attached using an adhesive. They can be easily combined with each other.

11, the adhesive groove 100 is formed in each of the first prism 16 and the second prism 17, and each of the adhesive groove portions 100 is disposed to face each other. can Similarly, when the adhesive groove 100 has a shape as shown in FIGS. 5 and 6 , the first prism 16 and the second prism 17 can be easily coupled to each other using an adhesive.

In addition, even when the adhesive groove 100 is formed in the shape shown in FIGS. 7 and 8 , the plurality of grooves, in particular, in the case of FIG. 8 , the first adhesive groove part 100-1 and the second adhesive groove part 100- 2) may be formed on each of the first prism 16 and the second prism 17 , and the respective adhesive grooves 100 may be disposed to face each other.

At this time, although the cross-section of the adhesive groove part 100 in each of the drawings is shown in a rectangular shape with one side open, the cross-sectional shape is not limited thereto. That is, the cross-section of the adhesive groove 100 may be formed in a V-shape, a curved shape, or other various shapes in addition to a rectangular shape with one side open.

On the other hand, as shown in FIG. 7 , when the adhesive groove part 100 is formed in a shape in which both sides are closed, the adhesive groove part 100 has one side open as shown in FIGS. 9 to 10 . may not be formed.

In an embodiment, since the adhesive groove is formed on the surface of the first prism or the second prism, there is an effect that the first prism and the second prism can be easily and firmly bonded to each other with an adhesive.

In addition, the adhesive groove portion prevents the adhesive from flowing into the central portion of each surface where the first prism and the second prism are coupled to each other to form an optical path or to improve the screen resolution and sharpness of the wearable display device. can

12 is a view showing a state in which the display screen 200 is formed according to an embodiment. An image that the user can see through the eyeball E may be implemented on the display screen 200 .

The display screen 200 may be formed in the central portion 171 of the second surface 170 of the second prism 17 . That is, an adhesive groove 100 is formed on the edge 172 of the second surface 170 , and an adhesive is introduced into the adhesive groove 100 to harden the first prism 16 and the second prism 17 . Incident light that combines with each other and implements an image displayed on the eyeball E at the central portion 171 of the second surface 170 is totally reflected and reaches the eyeball E.

Accordingly, the display screen 200 may be formed in the central portion 171 of the second surface 170, which is a total reflection portion. At this time, in the central portion 171 of the coupling portion of the first surface 160 and the second surface 170 , total reflection is clearly generated in the central portion 171 of the second surface 170 , so that the A space S may be formed to increase resolution, image quality, and the like.

Although only a few have been described as described above in relation to the embodiments, various other forms of implementation are possible. The technical contents of the above-described embodiments may be combined in various forms unless they are incompatible with each other, and may be implemented in a new embodiment through this.

16: first prism
17: second prism
100: adhesive groove
160: first surface
161: the central portion of the first surface
162: edge of the first surface
170: second surface
171: central portion of the second surface
172: edge of the second surface
200: display screen

Claims (13)

a first prism for controlling the path of the incident light; and
and a second prism coupled to the first prism,
the first surface of the first prism and the second surface of the second prism are coupled to each other;
An adhesive groove into which an adhesive is introduced is formed in an edge portion of at least one of the first surface of the first prism and the second surface of the second prism;
The adhesive groove portion is a wearable display device in which the longitudinal direction is formed of a plurality of grooves that do not communicate with each other in the first surface or the second surface formed in an inclined direction of the first surface or the second surface. According to claim 1,
a display unit for reproducing an image; and
and a lens that transmits light forming the image reproduced by the display unit and enters the first prism. According to claim 1,
The adhesive groove portion,
a first groove portion formed on the first surface of the first prism and a second groove portion formed on the second surface of the second prism, wherein the first groove portion and the second groove portion are disposed to face each other Wearable display device. According to claim 1,
Incident light incident on the second surface of the second prism is totally reflected,
The adhesive groove portion is formed in a portion of the second surface of the second prism that avoids a portion of total reflection of the incident light. 3. The method of claim 2,
The first prism is irradiated to the user's eye by adjusting the optical path of the image transmitted from the lens,
The second prism is a wearable display device to reduce distortion of the real image reaching the eye of the user. 5. The method of claim 4,
The wearable display device in which the first surface and the second surface are inclined in a direction in which the incident light is totally reflected. delete delete According to claim 1,
At least one groove among the plurality of grooves,
A wearable display device formed as a continuous groove in which one side is opened in the longitudinal direction and the other side is closed. According to claim 1,
The adhesive groove portion is a wearable display device in which a cross-section is formed in at least one of a rectangular shape, a V shape, and a curved shape. 3. The method of claim 2,
A central portion of the first surface is a region through which light forming an image reproduced by the display unit passes,
The adhesive groove portion is a wearable display device formed in an edge portion of the first surface other than the central portion of the first surface. 12. The method of claim 11,
The central portion of the second surface is a region through which light forming an image reproduced by the display unit is totally reflected,
The adhesive groove portion is a wearable display device formed in an edge portion of the second surface other than the central portion of the second surface. According to claim 1,
The adhesive groove portion is a wearable display device formed in at least one of both sides of the edge of at least one of the first surface and the second surface.

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