KR102451090B1 - Wearable display apparatus - Google Patents

Abstract

One embodiment of the wearable display device, a polarizing plate; a lens through which light forming an image incident from the polarizing plate is transmitted; a prism to which light that forms an image passing through the lens is incident; a base to which the lens and the prism are respectively coupled; and a coupling part configured to allow at least one of the lens and the prism to be coupled to the base from an inner lower surface of the base as viewed in a user's gaze direction.

Description

Wearable display device {WEARABLE DISPLAY APPARATUS}

The embodiment relates to a wearable display device having a structure in which components through which light passes are firmly coupled to each other so that the light is not distorted by shaking.

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 born to enable 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 to place an enlarged image in front of the user's eyes and allows the user to see it. The display used here generally has a size of 1 inch or less. 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 expand 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.

When each component is coupled to each other in the wearable display device, the components through which light passes need to be firmly coupled to each other so that the light is not distorted by shaking.

Accordingly, an object of the embodiment is to provide a wearable display device having a structure in which components through which light passes are firmly coupled to each other so that the light is not distorted by shaking.

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.

One embodiment of the wearable display device, a polarizing plate; a lens through which light forming an image incident from the polarizing plate is transmitted; a prism to which light that forms an image passing through the lens is incident; a base to which the lens and the prism are respectively coupled; and a coupling part configured to allow at least one of the lens and the prism to be coupled to the base from an inner lower surface of the base as viewed in a user's gaze direction.

The coupling portion may include a protruding boss and an insertion groove formed at a position corresponding to the boss and into which the boss is inserted.

At least some of the plurality of bosses may have different cross-sectional areas, and the cross-sections of the plurality of insertion grooves may be formed to correspond to the size of the cross-sectional area of the boss or to have a large area, respectively.

The boss may be fixed to the insertion groove with an adhesive.

The boss may be formed on an inner lower surface of the base, and the insertion groove may be formed on a lower surface of the lens or the prism.

The boss may be formed on a lower surface of the lens or the prism, and the insertion groove may be formed on an inner lower surface of the base.

The boss may be integrally formed with the base, the lens, or the prism.

The boss may be provided in at least one shape of a circle, an ellipse, and a polygon, and the insertion groove may be provided in a shape corresponding to each shape of the boss.

Another embodiment of the wearable display device, a polarizing plate; a lens through which light forming an image incident from the polarizing plate is transmitted; a prism to which light that forms an image passing through the lens is incident; and a base to which the lens and the prism are coupled, respectively, and a boss for coupling with the lens or the prism is formed on an inner lower surface of the base as viewed in the user's gaze direction, and corresponds to the boss of the lens or the prism. An insertion groove into which the boss is inserted may be formed in the portion to be used.

The prism may include: a first prism to which light that forms an image passing through the lens is incident; and a second prism that is coupled to one end of the first prism and totally reflects light that has passed through the first prism to reach the user's eye.

An insertion groove into which the boss formed in the base is inserted may be formed in the first prism.

The first prism and the second prism may be coupled to each other by an adhesive at an edge portion of each end facing each other.

The second prism may be one in which the total reflection occurs at a central portion of the end portion.

The second prism may have a display screen formed in a central portion of the end portion.

The boss includes a first boss inserted into an insertion groove formed in the lens and a second boss inserted into an insertion groove formed in the prism, wherein the first boss and the second boss are provided in plurality it could be

The boss may be fixed by being inserted into the insertion groove by an interference fit method.

Another embodiment of the wearable display device, a polarizing plate; a lens through which light forming an image incident from the polarizing plate is transmitted; a prism to which light that forms an image passing through the lens is incident; and a base to which the lens and the prism are coupled, respectively, and a boss for coupling with the base is formed on a lower surface of the lens or the prism as viewed in the user's gaze direction, and a boss corresponding to the boss is formed on an inner lower surface of the base. An insertion groove into which the boss is inserted may be formed in the portion.

The boss may include a third boss formed on the lens and a fourth boss formed on the prism, and the third boss and the fourth boss may be provided in plurality.

In an embodiment, the lower surface of the lens, the lower surface of the prism, the boss and the insertion groove disposed to face it are formed on the inner lower surface of the base to combine with each other, and a plurality of the boss and the insertion groove are formed to combine the lens and the base and the prism It can be firmly coupled between the base and the base.

In addition, there is an effect that can increase the resolution and image quality of the image implemented in the wearable display device by suppressing the shaking of the lens and the prism due to the strong coupling between the lens or the prism and the base.

In addition, since the lens and the prism are fixed to the inner lower surface of the base instead of the inner side, there is no need to form a separate structure for coupling the lens and the prism to the inner side of the base. can have an effect.

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 exemplary 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 plan view illustrating a boss and an insertion groove according to an embodiment.
5 is a perspective view illustrating a state in which a boss is formed on a base according to an embodiment.
6 is a perspective view illustrating a state in which an insertion groove is formed in a base according to an embodiment.
7 is a perspective view illustrating a state in which an insertion groove is formed on a lower surface of a lens according to an embodiment.
8 is a perspective view illustrating a state in which a boss is formed on a lower surface of a lens according to an exemplary embodiment.
9 is a perspective view illustrating a state in which an insertion groove is formed on a lower surface of a first prism according to an embodiment.
10 is a perspective view illustrating a state in which a boss is formed on a lower surface of a first prism according to an embodiment.
11 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 can have various changes and can have various forms, specific embodiments are 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 should be understood to include all modifications, equivalents, and substitutions 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)", it may include not only the upward direction but also the meaning of the downward direction based on one element.

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.

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 exemplary 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 in order to combine each of the above components into one 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 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. Accordingly, 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. have.

In addition, 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 spraying unit 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 spraying 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 method. 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 a high-resolution image 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 light, 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, light passing through the polarizing plate 14 and incident on the lens 15 may have only the s-wave component by using a different type of polarizing plate 14 .

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 like 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 in size, 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, and refract the incident light to change the optical path. 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 refraction portion may be formed, for example, by 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 purpose, 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 total reflection phenomenon 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. It is a virtual image that the user perceives visually as if it is located in front of the user's eyeball E because the path is adjusted.

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 distributing 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. Allows you 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 jetting 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 as a polarized beam splitter, as described above for adjusting the various optical paths.

Next, the polarizer 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 polarizer 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 view 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, the distortion of the 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 that can be 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 . As a result, 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 an image 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 plan view showing the boss 100 and the insertion groove 200 according to an embodiment. The wearable display device of the embodiment may include a coupling unit. The coupling part may serve to couple at least one of the lens 15 and the prism to the base 18 on the inner lower surface 181 of the base 18 as viewed in the user's gaze direction.

As described above, the prism may include a first prism 16 and a second prism 17 , and in an embodiment, the prism coupled to the base 18 may be the first prism 16 .

The coupling part may include a boss 100 protruding and an insertion groove 200 formed at a position corresponding to the boss 100 and into which the boss 100 is inserted. The boss 100 may be provided in plurality, and the insertion groove 200 may be provided in the same number as the number of the bosses 100 .

The boss 100 is suitably formed integrally with the base 18, the lens 15, or the prism in consideration of the ease of operation and the need for a firm coupling. The boss 100 may be integrally formed with the base 18 , the lens 15 , or the prism through a method such as injection molding.

At this time, at least some of the plurality of bosses 100 have different cross-sectional areas, and the cross-sections of the plurality of insertion grooves 200 correspond to the size of the cross-sectional area of the boss 100 or have a large cross-section, respectively. It may be formed to have an area.

It is appropriate for the boss 100 to have a large cross-sectional area in order to improve the coupling force between the lens 15 or the prism and the base 18 and prevent shaking, but the lens 15 or the prism and the base 18 ), the size of the area of the cross-section may be appropriately adjusted.

For example, as shown in FIG. 4 , in a portion where the surface area of the portion where the prism or lens 15 is coupled to the base 18 is large, the cross-sectional area of the boss 100 is large, and the In a portion having a small surface area, the cross-sectional area of the boss 100 may be formed to be relatively small.

Meanwhile, in FIG. 4 , two bosses 100 are formed in a portion where the prism is coupled, and two in a portion where the lens 15 is coupled, but the present invention is not limited thereto, and three or more are formed in each of the portions. Also, the number of insertion grooves 200 may correspond to the number of the bosses 100, and three or more may be formed in each of the portions. Hereinafter, for convenience of description, a structure in which two bosses 100 or insertion grooves 200 are formed in each of the respective portions will be described as an example.

At this time, the boss 100 may be inserted into the insertion groove 200 by, for example, an interference fit method. By such an interference fit, the prism or the lens 15 can be firmly coupled to the base 18 .

Meanwhile, the boss 100 is fixed to the insertion groove 200 with an adhesive so that the prism or the lens 15 can be more firmly coupled to the base 18 . In this case, the adhesive may be of various characteristics. 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.

In addition, although the cross section of the boss 100 is formed in a circular shape in FIG. 4 , the present invention is not limited thereto. That is, the boss 100 may be provided in a circular, oval, polygonal or other various shapes in cross section.

5 is a perspective view showing a state in which the boss 100 is formed on the base 18 according to an embodiment. 5 , the boss 100 may be formed on the inner lower surface 181 of the base 18 . In this case, the insertion groove 200 may be formed on the lower surface of the lens 15 or the prism at a position corresponding to the boss 100 of the base 18 .

Specifically, the boss 100 is inserted into the first boss 110 inserted into the insertion groove 200 formed in the lens 15 and the insertion groove 200 formed in the first prism 16 . and a second boss 120 to be used, and the first boss 110 and the second boss 120 may be provided in plurality, respectively, as shown in FIG. 5 .

At this time, for example, the plurality of the first bosses 110 may have the first prisms 16 attached to the base 18 when the first prisms 16 are coupled to and fixed to the base 18 . In order to minimize the shaking with respect to each other, it is appropriate to place them at an appropriate distance from each other. Such a separation distance may be appropriately selected in consideration of the number of the first bosses 110 and the cross-sectional area of each.

In addition, the respective arrangement positions of the first bosses 110 may also be appropriately selected so that the first prism 16 can minimize shaking with respect to the base 18 .

Meanwhile, the description of the first bosses 110 may be similarly applied to the second boss 120 inserted into the insertion groove 200 of the first prism 16 .

6 is a perspective view showing a state in which the insertion groove 200 is formed in the base 18 according to an embodiment. As shown in FIG. 6 , the insertion groove 200 may be formed in the inner lower surface 181 of the base 18 . In this case, the boss 100 may be formed on the lower surface of the lens 15 or the prism at a position corresponding to the boss 100 of the base 18 .

Specifically, the third boss 130 (130, see FIG. 8) formed on the lower surface 151 of the lens 15 is coupled to the insertion groove 200 formed at the coupling position of the lens 15, and , a fourth boss 140 (140, see FIG. 10) formed on the lower surface 161 of the first prism 16 in the insertion groove 200 formed at the coupling position of the first prism 16 is can be combined

7 is a perspective view showing a state in which the insertion groove 200 is formed on the lower surface 151 of the lens 15 according to an embodiment. As shown in FIG. 7 , the insertion groove 200 may be formed on the lower surface 151 of the lens 15 , and the boss 100 coupled to the insertion groove 200 is the base 18 . It may be formed on the inner lower surface 181 of In this case, the boss 100 may be a first boss 110 formed at a portion where the lens 15 is coupled to the lower surface 181 of the base 18 .

8 is a perspective view showing a state in which the boss 100 is formed on the lower surface 151 of the lens 15 according to an embodiment. As shown in FIG. 8 , a third boss 130 may be formed on the lower surface 151 of the lens 15 , and in this case, the lens 15 is formed on the inner lower surface 181 of the base 18 . An insertion groove 200 into which the third boss 130 is inserted may be formed in the portion where the .

9 is a perspective view showing a state in which the insertion groove 200 is formed on the lower surface 161 of the first prism 16 according to an embodiment. 9, the insertion groove 200 may be formed on the lower surface 161 of the first prism 16, and the boss 100 coupled to the insertion groove 200 is the base ( 18) may be formed on the lower surface 161 . In this case, the boss 100 may be a second boss 120 formed at a portion where the first prism 16 is coupled to the inner lower surface 181 of the base 18 .

In particular, the insertion groove 200 may be formed on the lower surface 161 of the first prism 16 at a portion where the first prism 16 is coupled to the base 18 .

10 is a perspective view illustrating a state in which the boss 100 is formed on the lower surface 161 of the first prism 16 according to an exemplary embodiment. As shown in FIG. 10 , a fourth boss 140 may be formed on the lower surface 161 of the first prism 16 , and in this case, the first boss 140 is formed on the inner lower surface 181 of the base 18 . An insertion groove 200 into which the fourth boss 140 is inserted may be formed in a portion where the prism 16 is coupled.

In particular, the fourth boss 140 may be formed on the lower surface 161 of the first prism 16 where the first prism 16 is coupled to the base 18 .

Meanwhile, like the first boss 110 , a plurality of the second boss 120 , the third boss 130 , and the fourth boss 140 may be provided.

11 is a view showing a state in which the display screen (S) according to an embodiment is formed. The prism may include a first prism 16 and a second prism 17, and the first prism 16 and the second prism 17 are attached to the adhesive P at the edge portions of each end facing each other. can be combined by

At this time, the adhesive (P) may be used in a variety of 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.

A central end portion of the first prism 16 is an optical path through which light forming an image incident from the lens 15 passes, and a central end portion of the second prism 17 is separated from the first prism 16 . This is a region where total reflection of light forming an incident image occurs.

Therefore, the adhesive P is applied to the edge portion of each end of the first prism 16 and the second prism 17 facing each other in order not to adversely affect the light forming the image for the above reasons. It is appropriate to couple the first prism 16 and the second prism 17 to each other.

A display screen S may be formed at a central portion of the end portion where total reflection of the second prism 17 occurs. An image that the user can see through the eyeball E may be implemented on the display screen S.

At this time, total reflection clearly occurs in the central portion of the end of the second prism 17 between the central portion of the portion where the respective ends of the first prism 16 and the second prism 17 face each other, so that the display screen (S) ), a space may be formed to increase the resolution, image quality, etc.

In the embodiment, the lower surface 151 of the lens 15, the lower surface of the prism, and the boss 100 and the insertion groove 200 disposed to face it are formed on the inner lower surface 181 of the base 18 to be coupled to each other and , by forming a plurality of the boss 100 and the insertion groove 200, the coupling between the lens 15 and the base 18 and the prism and the base 18 can be firmly coupled.

In addition, it is possible to increase the resolution and image quality of the image implemented in the wearable display device by suppressing the shaking of the lens 15 and the prism due to the strong coupling between the lens 15 or the prism and the base 18. .

In addition, since the lens 15 and the prism are fixed to the inner lower surface 181 rather than the inner side surface of the base 18, a separate structure for coupling the lens 15 and the prism to the inner side surface of the base 18 is formed. Since there is no need to do this, there is an effect that the wearable display device can be implemented in a slim overall shape.

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 as a new embodiment through this.

14: polarizer
15: lens
16: first prism
17: second prism
18: base
100: Boss
110: first boss
120: 2nd boss
130: 3rd boss
140: 4th boss
151: lower surface of the lens
161: lower surface of the first prism
181: the inner lower surface of the base
200: insertion groove

Claims (18)

Base;
a lens disposed within the base;
a first prism for controlling a path of light passing through the lens;
a first coupling part coupling the lens and the base; and
and a second coupling part coupling the first prism and the base;
The lens includes a first incident surface on which light is incident, a first output surface for emitting the light incident on the first incident surface, and a lower surface facing the inner surface of the base,
The first coupling portion includes a first boss and a first insertion groove coupled to the first boss, wherein the first boss is formed on one of the lower surface of the lens and the inner surface of the base, and the first The insertion groove is formed in the other one of the lower surface of the lens and the inner surface of the base,
The first prism is disposed inside the base and includes a first end coupled to the base, and the first prism includes a second incident surface through which light is incident from the lens, and a lower surface facing the inner surface of the base. , and a second exit surface,
The second coupling portion includes a second boss and a second insertion groove coupled to the second boss, wherein the second boss is disposed on one of the lower surface of the first end of the first prism and the inner surface of the base. is formed, and the second insertion groove is formed in the other one of the lower surface of the first end of the first prism and the inner surface of the base. According to claim 1,
The first boss includes a plurality of first bosses spaced apart from each other,
The first insertion groove is a wearable display device including a plurality of first insertion grooves corresponding to the plurality of first bosses. 3. The method of claim 2,
A wearable display device in which an area of a cross-section of at least one of the plurality of first bosses is different from that of the rest. According to claim 1,
The first boss is a wearable display device fixed to the first insertion groove with an adhesive. According to claim 1,
The first insertion groove is formed on the lower surface of the lens,
The first boss is a wearable display device formed on the inner surface of the base facing the lower surface of the lens. According to claim 1,
The first boss is formed on the lower surface of the lens,
The first insertion groove is a wearable display device formed on the inner surface of the base facing the lower surface of the lens. 7. The method of claim 6,
The first boss is a wearable display device integrally formed with the lens. According to claim 1,
The first boss is formed in at least one shape of a circle, an ellipse, and a polygon, and the first insertion groove is formed in a shape corresponding to the shape of the first boss. delete delete According to claim 1,
The second boss includes a plurality of second bosses spaced apart from each other,
The second insertion groove is a wearable display device including a plurality of second insertion grooves corresponding to the plurality of second bosses. According to claim 1,
and a second prism coupled to a second end of the first prism positioned opposite the first end of the first prism. 12. The method of claim 11,
A wearable display device in which an area of a cross section of at least one of the plurality of second bosses is different from that of the rest. According to claim 1,
The second boss is a wearable display device formed integrally with the first prism or the base. 13. The method of claim 12,
a display unit for reproducing an image; and
A wearable display device comprising a polarizing unit polarizing light forming an image of the display unit and emitting it to the lens. Base;
a lens disposed within the base;
a first prism for controlling a path of light passing through the lens;
a first coupling part including a first boss and a first insertion groove coupled to the first boss to couple the first prism and the base; and
and a second coupling part including a second boss and a second insertion groove coupled to the second boss to couple the lens and the base,
The first prism includes a first incident surface on which light is incident from the lens, a lower surface facing the inner surface of the base, and a first exit surface,
The first boss is formed on one of the lower surface of the first prism and the inner surface of the base, and the first insertion groove is formed in the other of the lower surface of the first prism and the inner surface of the base. become,
The lens includes a second incident surface on which light is incident, a second exit surface, and a lower surface facing the inner surface of the base, and the second boss is any one of the lower surface of the lens and the inner surface of the base. is formed, and the second insertion groove is formed in the other one of the lower surface of the lens and the inner surface of the base. 17. The method of claim 16,
The first boss includes a plurality of first bosses spaced apart from each other,
The first insertion groove corresponds to the plurality of first bosses and includes a plurality of first insertion grooves spaced apart from each other. delete

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