KR20160091005A - Wearable display apparatus - Google Patents

Abstract

One embodiment of the wearable display device includes a base on which a receiving space is formed; A prism located in front of the user's eyeball and adjusting at least a part of the path of light to reach a virtual image displayed on the eyeball; And a fastening unit that restricts the movement of the prism with respect to the base by engaging a part of the prism and a part of the base with each other.

Description

[0001] WEARABLE DISPLAY APPARATUS [0002]

The embodiment relates to a wearable display device having a structure capable of significantly limiting the phenomenon that the prism moves with respect to the base.

The contents described in this section merely provide background information on the embodiment and do not constitute the prior art.

A wearable display device such as an HMD (Head Mounted Display) is a device born to enable pilots to know flight information such as altitude and speed of an airplane. Commercial commercial products were developed in the 1990s, and since 1997, commercial products have been attracting much attention.

A wearable type display device is a device that allows a user to view a large-sized image placed on the front of a user's eye by wearing it on the head like a pair of glasses. The display used here is generally one inch or less in size, Optical technology is applied, and it is possible to see a magnification close to 100 times.

Wearable computing industry is expected to grow due to the development and commercialization of peripherals such as wearable display devices. Up to now, wearable display devices have been mainly developed for enjoying movies and games, but recently, research and development has been conducted as a wearable monitor due to the high performance of computer systems, miniaturization, rapid development of display devices and video communication technologies represented by LCDs and LEDs And commercialized products were released.

The wearable display market has suffered a lot in the market due to the relatively high prices in the past, but the market is expected to grow strongly in the wearable computer industry. Wearable display devices are expected to expand into sports entertainment fields such as motor racing as well as maintenance sites, logistics warehouses, etc. for large-scale equipment such as industrial sites, automobiles, aircrafts and ships.

Particularly, advances in processors and software technologies enable the miniaturization of computing devices, and wearable display devices are expected to evolve into personal computing devices, such as smart phones, rather than simply devices that display images.

In the wearable display device, the light reaching the user's eye forms a predetermined path, and maintaining such an optical path stably affects the performance of the product. In the manufacture of a wearable display device by combining the respective components, in particular, a prism through which light incident on a user's eye ultimately passes is coupled to the base, wherein the prism is not fixedly coupled to the base, Can move.

When the movement of the prism with respect to the base occurs, the optical path is not stably maintained, thereby deteriorating the quality of the wearable display device.

In order to solve such a problem, the base and the prism can be fixedly coupled using an adhesive material, but in this case, the adhesive material may flow down to contaminate the wearable display device, thereby deteriorating the operation performance and image quality. Further, since the adhesive material itself can not ensure a sufficient bonding strength, there is still a problem that the prism may move about the base.

Therefore, it is an object of the present invention to provide a wearable display device having a structure in which the phenomenon that the prism moves relative to the base can be significantly restricted.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

One embodiment of the wearable display device includes a base on which a receiving space is formed; A prism located in front of the user's eyeball and adjusting at least a part of the path of light to reach a virtual image displayed on the eyeball; And a fastening unit that restricts the movement of the prism with respect to the base by engaging a part of the prism and a part of the base with each other.

The fastening unit may include: a coupling protrusion formed at a plurality of ends of the prism; And an insertion portion formed at a position corresponding to the engagement protrusion of the end portion of the base in the same number as the engagement protrusion.

The insertion portion may be formed as a hole or a groove for inserting the engagement protrusion.

The coupling protrusion may be one that is coupled to the insertion portion by interference fit and / or an adhesive material.

The coupling protrusion may be formed to protrude from the bottom surface of the prism, and the insertion portion may be formed at a position corresponding to the coupling protrusion below the base.

The coupling protrusion may be formed on at least one of both sides of the prism, and the insertion portion may be formed at a position corresponding to the coupling protrusion on at least one of both sides of the base.

The coupling protrusion may protrude from the bottom surface and both side surfaces of the prism, and the insertion portion may be formed at a position corresponding to the coupling protrusion on the lower and the base of the base.

The fastening unit may include: a first concave-convex portion formed at an end of the prism; And a second concave-convex portion formed at an end of the base so as to cooperate with the first concave-convex portion at a portion corresponding to the first concave-convex portion.

The first concavo-convex part and the second concavo-convex part may be coupled to each other by interference fit and / or adhesive material.

The first concavo-convex portion may be formed on a bottom surface of the prism, and the second concavo-convex portion may be formed on a lower portion of the base so as to coincide with the first concavo-convex portion on a portion corresponding to the first concavo-convex portion.

The first concavo-convex portion is formed on at least one of both sides of the prism, and the second concavo-convex portion is formed to cooperate with at least one of the base both side portions on the portion corresponding to the first concavo- Lt; / RTI >

The first concavo-convex portion may be formed on the bottom surface and both side surfaces of the prism, and the second concavo-convex portion may be formed on the lower portion of the base and both side portions of the prism to coincide with the first concavo- have.

The fastening unit may include: a coupling protrusion formed at a plurality of end portions of the base; And an insertion portion formed at the end portion of the prism at a position corresponding to the coupling protrusion at the same number as the coupling protrusion and into which the coupling protrusion is inserted.

In the embodiment, the fastening unit moves the prism coupled to the base with respect to the base, and thus changes and distortion of the optical path passing through each component and the prism accommodated in the receiving space of the base can be remarkably reduced. Therefore, the fastening unit can stably maintain the optical path to improve the performance of the wearable type display apparatus.

Further, when the prism is coupled to the base, an adhesive material is not used, or an adhesive material is applied only to the coupling unit, that is, the coupling projection formed on the first prism and the base, the insertion portion, the first concave- The use of the adhesive material can be remarkably reduced. Therefore, it is possible to prevent the deterioration of the image quality of the reproduced image due to the adhesive material of the wearable display device, and the assembling process of the wearable display device can be simplified.

1 is a perspective view showing a wearable display device according to an embodiment.
2 is an exploded perspective view showing a wearable display device according to an embodiment.
3 is a plan view showing a path of light forming a virtual image in a wearable display device according to an embodiment.
FIGS. 4A and 4B are views for explaining the combined state of the first prism and the base according to one embodiment.
FIGS. 5A and 5B are views for explaining a combined state of the first prism and the base according to another embodiment.
FIGS. 6A and 6B are views for explaining a combined state of the first prism and the base according to another embodiment. FIG.
FIGS. 7A and 7B are views for explaining a combined state of the first prism and the base according to another embodiment. FIG.
FIGS. 8A and 8B are views for explaining a combined state of the first prism and the base according to another embodiment. FIG.
FIGS. 9A and 9B are views for explaining a combined state of the first prism and the base according to another embodiment. FIG.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The embodiments are to be considered in all aspects as illustrative and not restrictive, and the invention is not limited thereto. It is to be understood, however, that the embodiments are not intended to be limited to the particular forms disclosed, but are to include all modifications, equivalents, and alternatives falling within the spirit and scope of the embodiments. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience.

The terms "first "," second ", and the like can be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. In addition, terms specifically defined in consideration of the constitution and operation of the embodiment are only intended to illustrate the embodiments and do not limit the scope of the embodiments.

In the description of the embodiments, when it is described as being formed on the "upper" or "on or under" of each element, the upper or lower (on or under Quot; includes both that the two elements are in direct contact with each other or that one or more other elements are indirectly formed between the two elements. Also, when expressed as "on" or "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

It is also to be understood that the terms "top / top / top" and "bottom / bottom / bottom", as used below, do not necessarily imply nor imply any physical or logical relationship or order between such entities or elements, But may be used only to distinguish one entity or element from another entity or element.

Further, in the drawings, an orthogonal coordinate system (x, y, z) can be used. In the drawing, the x axis and y axis mean a plane perpendicular to the optical axis. For convenience, the optical axis direction (z axis direction) can be referred to as a first direction, the x axis direction as a second direction, and the y axis direction as a third direction .

The wearable display device of the embodiment is a device that can be worn like a pair of glasses in a human body and can view an image received from an external device without any limitation on a human being. The device serving as a source for transmitting the image may be a smart phone or other mobile device, and may be connected to the wearable display device by wire or wireless.

At this time, the wearable display device of the embodiment may be detachably coupled to the glasses for wearing, or a separate wearing mechanism may be combined to allow the wearer to wear it, such as glasses.

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

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

In addition, the wearable display device of the embodiment may include a base 18, a cover member 19, and a fastening portion 22 to be combined into a bundle of the above-described components. In addition, the wearable display device of the embodiment may include a printed circuit board 20 and a connector 21 to electrically connect 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 irradiates the image, which is an object of reproduction, transmitted 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 in a variety of ways. For example, the light source unit 10 may be constructed using an LED having excellent durability, low heat generation, and small size.

The light guiding unit 11 may control the optical path so that the image irradiated from the light source unit 10 is directed to the beam splitting unit 12. 3, the light source unit 10 and the beam splitting unit 12 are positioned substantially at right angles to each other when the light guide unit 11 is viewed as a center. Therefore, in order to direct the light forming the image irradiated from the light source section 10 to the beam splitting section 12, the light guide section 11 may be provided with a plurality of gratings provided at suitable angles have.

In addition, the light guiding unit 11 may uniformly distribute the light emitted from the light source unit 10 to the beam splitter 12 due to the formation of the lattice. Therefore, the light uniformly irradiated from the light guiding portion 11 can be uniformly incident on the surface of the beam splitting portion 12 adjacent to the light guiding portion 11. [

The beam splitter 12 irradiates the light incident from the light guiding unit 11 to the display unit 13 and receives the reproduced image from the display unit 13 so that the user can specifically view it with the naked eye, (15). ≪ / RTI >

That is, the beam splitter 12 receives light for transmitting light to the display unit 13 or for forming an image reproduced from the display unit 13, The path of the light forming the 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 polarization beam injector may be formed by combining a plurality of gratings and forming a thin film capable of reflecting and / or diffracting light in each grating.

The display unit 13 plays back the light incident from the beam splitter 12 as an image that can be specifically detected by the user. For example, the display unit 13 may be a reflection type display that irradiates the reproduced image to the beam splitter 12 again.

Such a reflective display is, for example, the Lcos method. The Lcos method is a reflection type display that reflects incident light to reproduce an image. 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 the light forming the image incident from the display unit 13. The polarizing plate 14 can transmit the p-wave light among the components of the light forming the incident image and absorb the s-wave.

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

Since the polarizing plate 14 transmits only the p-wave of the incident light, the light transmitted through the polarizing plate 14 and incident on the lens 15 has only the p-wave component. Of course, it is also possible to use another type of polarizing plate 14 to transmit only the s-wave component of the light transmitted through the polarizing plate 14 and incident on the lens 15.

The polarizing plate 14 has a structure in which the light forming the incident image has the p-wave component and the s-wave component at the same time, so that the light of the p-wave component and the light of the s-wave component interfere with each other, .

The light guiding portion 11 also has a function of polarizing light like the polarizing plate 14 to polarize the light incident from the light source portion 10 so that the light of the p wave component and the light of the s wave component interfere with each other It is possible to prevent the image quality of the image from deteriorating.

The lens 15 may transmit light forming an image incident from the polarizing plate 14 and enlarge the image. That is, the image formed by the light incident from the polarizer 14 has a very small size, which is inconvenient for the user to view the image. Thus, the lens 15 serves to enlarge such an image to a size suitable for the user to see with the naked eye.

Light that forms an enlarged image while passing through the lens 15 is incident on the first prism 16. At this time, in order to appropriately adjust the optical path from the lens 15 to the first prism 16, a refraction part may be formed on a part of the lens 15, if necessary. Such a refracting portion can be formed, for example, by combining a medium having a different density with another portion of the lens 15.

The first prism 16 may serve to reach an image transmitted from the lens 15 to the eye E of the user. For this purpose, the light forming the image incident from the lens 15 must be appropriately adjusted in its path. In order to adjust the light path, a total reflection phenomenon in the first prism 16 is used and a reflection layer (not shown) for reflecting light in order to adjust a final light path incident on the user's eye E Or may be formed on the first prism 16.

At this time, the image transmitted 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 is located in front of the user's eye E, this image is displayed on the display unit 13, which is not located in front of the user's eye E, The user is visually recognized as if he or she is located in front of the user's eye E,

The optical path forming the virtual image in the wearable display device of the embodiment is as shown in Fig. Specifically, first, the light source unit 10 electrically connected to the printed circuit board 20 receives information of an image to be reproduced from an external device through the printed circuit board 20, and transmits the light containing the image to the light guide unit 11). At this time, the light emitted from the light source unit 10 may be an RGB signal.

Next, the light guiding portion 11 adjusts the light path from the light source 10 to the beam splitting portion 12. At this time, the light guiding portion 11 may function to uniformly distribute the light irradiated from the light source portion 10 to the beam splitting portion 12 due to the formation of the grid. The light guiding portion 11 has a function of polarizing light to polarize the light incident from the light source portion 10 so that the light of the p-wave component and the light of the s-wave component interfere with each other, .

Next, the beam splitter 12 irradiates the light incident from the light guide 11 onto the display unit 13 to allow the user to specifically recognize the light incident on the display unit 13 with the naked eye So that it can be reproduced with a certain image.

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

Next, the beam splitter 12 causes the polarizing plate 14 to enter the light forming the image to be incident from the display unit 13. [ At this time, the beam splitter 12 may be formed of a polarization beam injector as described above for the various optical path adjustments described above.

Next, the polarizing plate 14 polarizes the light forming the image incident from the beam splitter 12. At this time, since the light transmits only one of the p wave or the s wave and absorbs the remaining wave, the light transmitted through the polarizer 14 is polarized so as to have only one of the p wave or the s wave. This is to prevent image quality deterioration due to interference between p-wave and s-wave as described above.

Next, the lens 15 receives the light forming the image incident from the polarizing plate 14 and enlarges the image to a size suitable for the user to see with the naked eye. At this time, as described above, a refracting portion may be formed in a part of the lens 15 for adjusting the optical path, and the light transmitted through the refracting portion is incident on the first prism 16 at an incident angle.

The first prism 16 may act 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. At this time, the adjustment of the optical path can be realized by using the total reflection phenomenon of the first prism 16 and the reflective layer formed on the first prism 16.

The second prism 17 may be combined with the first prism 16 to reduce the distortion of the real image reaching the user's eye E. The user can simultaneously see the actual image of the actual object in front of the user's eye E together with the virtual image which 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 shape of the end of the first prism 16 may distort the actual image reaching the user's eye E. This is because an end shape of the first prism 16 may cause refraction or diffraction of light, which actually shows the shape.

Therefore, when the second prism 17 is joined to the end of the first prism 16 to extend the entire prism, the distortion of the real image due to the end shape of the first prism 16 can be reduced.

The base 18 has a receiving space S and serves to accommodate the light guide 11, the beam splitter 12, the display 13, the polarizer 14, the lens 15, . Since the base 18 accommodates various components of the embodiment, its shape can be complicatedly formed. Thus, the base 18 can be manufactured by a method capable of being manufactured in such a complicated shape, for example, injection molding or the like.

The cover member 19 closes at least a portion of the top of the base 18 so that each component received in the base 18 can be stably received in the base 18. [ Further, the cover member 19 can be engaged with the base 18 by the fastening portion 22.

A protrusion 171 is formed on the upper surface of the cover member 19 so that a groove or a hole formed in the printed circuit board 20 is coupled to the protrusion 171 to connect the cover member 19 to the printed circuit board 20 can be engaged.

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

Meanwhile, grooves or holes may be formed in the upper and lower portions of the printed circuit board 20. The upper and lower portions of the printed circuit board 20 can be coupled to the protruding portions 171 formed on the upper surface of the cover member 19 and the protruded portions 171 formed on the lower portion of the base 18 respectively.

The connector 21 may serve to connect the printed circuit board 20 to an external device. The external device may be a control device for controlling the wearable display device of the embodiment, a storage device for storing images to be reproduced, a communication device capable of interlocking the wearable display device with a mobile device such as a smart phone, or the like .

The fastening portion 22 can serve to connect the cover member 19 and the base 18 to each other. Therefore, if the fastening portion 22 is inserted into a hole or a groove formed in the cover member 19 and the base 18, respectively, and the cover member 19 and the base 18 can be detachably coupled Either can be used. For example, bolts, screws, coupling pins and the like can be used as the fastening portions 22.

FIGS. 4A and 4B are views for explaining the coupling state of the first prism 16 and the base 18 according to one embodiment. The prism is coupled to the base 18 and in the embodiment the first prism 16 may be coupled to the base 18 and the first prism 16 may be provided with a coupling unit for coupling the base 18 .

At this time, the fastening unit may restrict a movement of the prism relative to the base 18 by causing a part of the prism and a part of the base 18 to be engaged with each other. That is, in the embodiment, in the fastening unit, the prism coupled to the base 18 is moved with respect to the base 18, such that the prism moves and passes through the prism and each component contained in the receiving space S of the base 18 It is possible to remarkably reduce the distortion and the change of the optical path. Therefore, the fastening unit can stably maintain the optical path to improve the performance of the wearable type display apparatus.

The coupling unit may include a coupling protrusion 110 formed at a plurality of ends of the prism and a coupling protrusion 110 formed at a position corresponding to the coupling protrusion 110 at the end of the base 18, As shown in FIG. At this time, the insertion portion 120 may be formed as a hole or a groove so that the coupling protrusion 110 is inserted.

In this case, although the coupling protrusion 110 is shown in a circular shape in FIG. 4A, the coupling protrusion 110 is not limited thereto, and may be formed in various shapes such as a triangle, a polygon such as a rectangle, an ellipse and the like.

4A and 4B, the coupling protrusion 110 protrudes from the bottom surface 16a of the first prism 16, and the insertion unit 120 May be formed at a position corresponding to the coupling protrusion 110 below the base 18.

At this time, it is appropriate that the coupling protrusions 110 are provided in plural to limit rotation of the first prism 16 coupled to the base 18 with respect to the base 18. The number and position of the coupling protrusions 110 may be arbitrarily selected within the limit of the coupling portion with the base 18 at the end of the bottom surface 16a of the first prism 16 .

FIGS. 5A and 5B are views for explaining how the first prism 16 and the base 18 are engaged with each other according to another embodiment. 5A and 5B, the engaging protrusion 110 is protruded from one side 16b-1 of the first prism 16, and the inserting portion 120 May be formed at a position corresponding to the coupling protrusion 110 on one side of the base 18.

5A, the light projecting surface 163 is inclined in the longitudinal direction of the first prism 16, as shown in FIG. 5A. In this embodiment, the light projecting surface 163 is formed at the end of the first prism 16, But it is not limited thereto and may be formed perpendicular to the longitudinal direction of the first prism 16. The light projecting surface 163 is a portion where light transmitted through the lens 15 is incident on the first prism 16.

6A and 6B are views for explaining a state of engagement of the first prism 16 and the base 18 according to another embodiment. 6A and 6B, the coupling protrusion 110 is protruded from the other side 16b-2 of the first prism 16, and the insertion portion 120 may be formed on the other side of the base 18 at a position corresponding to the coupling protrusion 110.

The other side 16b-2 of the first prism 16 means the opposite side of the one side 16b-1 shown in FIG. 5a on both sides of the first prism 16, The side portion refers to a portion of the base 18 shown in Fig. 5B facing the side portion where the insertion portion 120 is formed.

The coupling protrusion 110 described in each of the above embodiments may be coupled to the insertion portion 120 described in each of the above embodiments by interference fit and / or adhesive material.

Various kinds of adhesive materials may be used, but it is appropriate to use an epoxy-based material having good adhesive strength. It is also more appropriate to use an ultraviolet (UV) curable epoxy to facilitate the work.

The coupling protrusions 110 are formed on the bottom surface 16a and both sides of the first prism 16, that is, one side 16b-1 of the first prism 16 and the other side 16b- And the insertion portion 120 is formed at the lower portion and the both side portions of the base 18 and the other side portion of the base 18 and the coupling projection 16b- 110, respectively.

The inserting portion 120 has a bottom surface 16a and both sides of the first prism 16 and one side 16b-1 of the first prism 16, And the engaging protrusion 110 is formed on the lower side and both sides of the base 18, that is, on one side of the base 18 and on the other side of the base 18, The protrusion 120 may be formed at a position corresponding to the protrusion 120, respectively.

FIGS. 7A and 7B are views for explaining a state of engagement of the first prism 16 and the base 18 according to another embodiment.

The fastening unit may include a first prism portion 130 formed at an end of the first prism 16 and a second prism portion 130 at a portion of the end portion of the base 18 corresponding to the first prism portion 130. [ And a second concave-convex portion 140 formed to cooperate with the first concave-convex portion 130.

In this case, the shapes of the first irregular portion 130 and the second irregular portion 140 are shown in FIG. 7A and FIG. 8A as quadrangular shapes, but the present invention is not limited thereto, and may be formed in various shapes such as a triangular shape and a wavy shape.

7A and 7B, the first concave-convex part 130 is formed on the bottom surface 16a of the first prism 16, and the second concave-convex part 130 is formed on the bottom surface 16a of the first prism 16, The portion 140 may be formed on the lower portion of the base 18 to correspond to the first concavoconvex portion 130 and the first concavoconvex portion 130.

At this time, the first concavo-convex part 130 is formed on the bottom surface 16a of the first prism 16 by appropriately selecting the length, width, position, number of concave or convex parts, .

8A and 8B are views for explaining a state of engagement between the first prism 16 and the base 18 according to yet another embodiment. 8A and 8B, the first concavo-convex part 130 is formed on one side 16b-1 of the first prism 16, and the second concavo- The base 140 may be formed at one side of the base 18 so as to cooperate with the first concave-convex portion 130 at a portion corresponding to the first concave-convex portion 130.

5A, a light transmitting surface 163 is formed at the end of the first prism 16, and as shown in FIG. 8A, in the embodiment, the light transmitting surface 163 is formed in the 1 prism 16, but it is not limited thereto and may be formed perpendicular to the longitudinal direction of the first prism 16.

FIGS. 9A and 9B are views for explaining the engagement state of the first prism 16 and the base 18 according to another embodiment. 9A and 9B, the first concavo-convex part 130 is formed on the other side 16b-2 of the first prism 16, and the second concavo- The base 140 may be formed on the other side of the base 18 so as to cooperate with the first concave-convex portion 130 at a portion corresponding to the first concave-convex portion 130.

The other side 16b-2 of the first prism 16 means the opposite side of the one side 16b-1 shown in FIG. 8a on both sides of the first prism 16, and the other side 16b- The side portion refers to a portion of the base 18 facing the one side portion where the second concave-convex portion 140 is formed.

The first concavo-convex part 130 and the second concavo-convex part 140 described in each of the above embodiments may be coupled to each other by interference fit and / or adhesive material.

The first concavo-convex part 130 is formed on the bottom surface 16a and both sides of the prism, that is, one side 16b-1 of the first prism 16 and the other side 16b-2 of the first prism 16, And the second concavo-convex part 140 is formed on the lower and both sides of the base 18, that is, one side of the base 18 and the other side of the base 18, And may be formed to cooperate with the first concave-convex portion 130 at a corresponding portion.

According to the embodiment, when the prism is coupled to the base 18, no adhesive material is used, or the coupling protrusions 110 formed in the coupling unit, that is, the first prism 16 and the base 18, 120, the first irregular portion 130, or the second irregular portion 140, the use of the adhesive material can be significantly reduced. Therefore, it is possible to prevent the deterioration of the image quality of the reproduced image due to the adhesive material of the wearable display device, and the assembling process of the wearable display device can be simplified.

While only a few have been described above with respect to the embodiments, various other forms of implementation are possible. The technical contents of the embodiments described above may be combined in various forms other than mutually incompatible technologies, and may be implemented in a new embodiment through the same.

10:
11:
12: beam splitter
13:
14: polarizer
15: Lens
16: first prism
16a: a bottom surface of the first prism
16b-1: one side of the first prism
16b-2: the other side of the first prism
163:
17: second prism
18: Base
19: cover member
20: printed circuit board
21: Connector
22:

Claims (13)

A base on which a receiving space is formed;
A prism located in front of the user's eyeball and adjusting at least a part of the path of light to reach a virtual image displayed on the eyeball;
A fastening unit for restricting movement of the prism with respect to the base by engaging a portion of the prism with a portion of the base;
And a display device. The method according to claim 1,
The fastening unit includes:
A plurality of coupling protrusions formed at the ends of the prism; And
An insertion portion formed at an end portion of the base at a portion corresponding to the engagement projection portion, the same number as the engagement projection portion;
And a display device. 3. The method of claim 2,
Wherein the insertion portion is formed as a hole or a groove so as to insert the engagement protrusion. 3. The method of claim 2,
Wherein the engagement protrusion is engaged with the insertion portion by interference fit and / or an adhesive material. 3. The method of claim 2,
Wherein the coupling protrusion is protruded from a bottom surface of the prism and the insertion portion is formed at a position corresponding to the coupling protrusion below the base. 3. The method of claim 2,
Wherein the engaging protrusion is formed on at least one of both side surfaces of the prism and the inserting portion is formed at a position corresponding to the engaging protrusion on at least one of both sides of the base. 3. The method of claim 2,
Wherein the coupling protrusions are formed on the bottom surface and both sides of the prism, respectively, and the insertion portions are respectively formed at positions corresponding to the coupling protrusions on the lower and the base portions of the base. The method according to claim 1,
The fastening unit includes:
A first concave-convex portion formed at an end of the prism; And
A second concavo-convex portion formed at an end of the base so as to cooperate with the first concavo-convex portion at a portion corresponding to the first concavo-convex portion;
And a display device. 9. The method of claim 8,
Wherein the first concavo-convex portion and the second concavo-convex portion are engaged with each other by interference fit and / or an adhesive material. 9. The method of claim 8,
Wherein the first concavo-convex portion is formed on a bottom surface of the prism, and the second concavo-convex portion is formed in a lower portion of the base to coincide with the first concavo-convex portion on a portion corresponding to the first concavo-convex portion. 9. The method of claim 8,
The first concavo-convex portion is formed on at least one of both sides of the prism, and the second concavo-convex portion is formed to cooperate with at least one of the base both side portions on the portion corresponding to the first concavo- A wearable display device. 9. The method of claim 8,
Wherein the first concavo-convex portion is formed on a bottom surface and both side surfaces of the prism, and the second concavo-convex portion is formed on a lower portion of the base and on both sides of the prism, Display device. The method according to claim 1,
The fastening unit includes:
A plurality of coupling protrusions formed at an end of the base; And
An insertion portion formed at an end portion of the prism at a position corresponding to the coupling protrusion at the same number as the coupling protrusion and into which the coupling protrusion is inserted;
And a display device.

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