KR102596553B1 - Wearable display apparatus - Google Patents

Abstract

The embodiment includes a base in which a receiving space is formed, a first prism including a first end disposed in the receiving space of the base, a fastening unit that fastens the base and the first end of the first prism, and a cover member coupled to the upper part of the base. , and a printed circuit board including a lower part coupled to the outer surface of the lower part of the base and an upper part coupled to the outer surface of the cover member, wherein the first end of the first prism is an incident surface on which light is incident and one side of the incident surface. It is located on and includes a side facing the inner surface of the base, and the fastening unit is formed on the inner surface of the base and includes a coupling protrusion formed on the side of the first end of the first prism and protruding toward the inner surface of the base, and a coupling protrusion formed on the inner surface of the base. It includes an insertion part to be coupled, and the fastening unit is located between the inner surface of the base and the inner surface of the cover member.

Description

Wearable display device {WEARABLE DISPLAY APPARATUS}

The embodiment relates to a wearable display device having a structure that can significantly limit the movement of the prism with respect to the base.

The content described in this section simply provides background information on the embodiments and does not constitute prior art.

Wearable display devices such as HMD (Head Mounted Display) are devices that were created to allow pilots to know flight information such as altitude and speed of an airplane. General commercial products were developed in the 1990s, and commercialized products have been attracting a lot of attention since 1997.

A wearable display device is a device that is worn on the head like glasses and displays a large image in front of the user's eyes, allowing the user to view it. The display used here is usually 1 inch or less in size and is of high quality. By applying optical technology, you can see a screen that is close to 100 times enlarged.

The growth of the wearable computing industry is also expected due to the development and commercialization of peripheral devices such as wearable display devices. Wearable display devices to date have been mainly developed to enjoy movies or games, but recently, with the rapid development of display devices and video communication technologies such as LCD and LED, as well as higher performance and miniaturization of computer systems, research and development as wearable monitors has been conducted. and commercialized products have also been released.

The wearable display device market has faced many difficulties in the past due to relatively high prices, but the market is expected to grow significantly by taking advantage of the wearable computer industry. Wearable display devices are expected to expand not only to industrial sites, maintenance sites for large equipment such as automobiles, aircraft, and ships, and logistics warehouses, but also to sports entertainment fields such as car racing.

In particular, advances in processor and software technology are making it possible to miniaturize computing devices, and wearable display devices are expected to go beyond devices that simply display images and develop into personal computing devices such as smartphones.

In a wearable display device, light reaching the user's eyes forms a predetermined path, and maintaining this light path stably has a significant impact on the performance of the product. In manufacturing a wearable display device by combining each component, in particular, the prism through which the light entering the user's eye ultimately passes is coupled to the base. The prism is not fixedly coupled to the base, but is connected to the base. You can move.

If movement of the prism with respect to the base occurs, the optical path is not maintained stably, and therefore there is a risk of deterioration in the quality of the wearable display device.

To solve this problem, the base and prism can be fixedly combined using an adhesive material, but in this case, the adhesive material may flow down and contaminate the wearable display device, deteriorating operating performance and image quality. Additionally, since the adhesive material itself cannot secure sufficient bonding strength, there is still a problem in that the prism may move relative to the base.

Accordingly, the purpose of the embodiment is to provide a wearable display device with a structure that can significantly limit the phenomenon of the prism moving relative to the base.

The technical problems to be achieved by the embodiment are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below.

A wearable display device according to an embodiment includes a base in which a receiving space is formed; a first prism including a first end disposed within the receiving space of the base; a fastening unit that fastens the base and the first end of the first prism; a cover member coupled to the upper part of the base; And a printed circuit board including a lower part coupled to the outer surface of the lower part of the base and an upper part coupled to the outer surface of the cover member, wherein the first end of the first prism is an incident surface on which light is incident; and a side located on one side of the incident surface and facing the inner surface of the base, wherein the fastening unit is formed on the side of the first end of the first prism and protrudes toward the inner surface of the base. It includes a coupling protrusion and an insertion part formed on the inner surface of the base and coupled to the coupling protrusion, and the fastening unit is located between the inner surface of the base and the inner surface of the cover member.

The coupling protrusion may include a plurality of coupling protrusions, and the insertion part may include a plurality of insertion parts corresponding to the plurality of coupling protrusions. The insertion portion may be formed as a hole or groove.

The first prism may include an emission surface disposed at a second end located opposite to the first end. The wearable display device may include a second prism coupled to the first prism.

The wearable display device includes a display unit that plays an image; And it may include a lens that transmits light forming the image reproduced in the display unit and makes it incident on the first prism.

The first prism can adjust the optical path of the image transmitted from the lens to irradiate it to the user's eyeball, and the second prism can reduce distortion of the real image reaching the user's eyeball.

The incident surface of the first prism may be formed to be inclined in the longitudinal direction of the first prism.

The inner surface of the base may include a first inner surface, and the side of the first end of the first prism may include a first side opposite the first inner surface of the base, The fastening unit is formed on the first inner surface of the base and a first engaging protrusion formed on the first side of the first end of the first prism and protruding toward the first inner surface of the base. It may include a first fastening unit including a first insertion part coupled to the first coupling protrusion.

The inner surface of the base may include a second inner surface located opposite to the first inner surface, and the side of the first end of the first prism is the first side of the first end. It may include a second side located on the opposite side and facing the second inner side of the base, wherein the fastening unit is formed on the second side of the first end of the first prism and the second side of the base. It may include a second fastening unit including a second coupling protrusion protruding toward the inner surface and a second insertion part formed on the second inner surface of the base and coupled to the second coupling protrusion.

The base may include a third inner side positioned between the first inner side and the second inner side, and the first end of the first prism is disposed between the first side and the second side. and a lower surface facing the third inner surface of the base, wherein the fastening unit includes a third coupling protrusion formed on the lower surface of the first prism and a third coupling protrusion formed on the third inner surface of the base and the third coupling unit. It may include a third fastening unit including a third insertion part coupled to the protrusion.

In an embodiment, the fastening unit causes the prism coupled to the base to rotate with respect to the base, thereby significantly reducing the change and distortion of the optical path passing through each component and prism accommodated in the receiving space of the base. Therefore, the fastening unit has the effect of improving the performance of the wearable display device by stably maintaining the optical path.

In addition, when connecting a prism to a base, no adhesive material is used, or the adhesive material is applied only to the coupling unit, that is, the coupling protrusion, insertion portion, first concave-convex portion, or second concave-convex portion formed on the first prism and the base. The use of adhesive materials can be significantly reduced. Therefore, it is possible to prevent image quality deterioration of the playback image due to the adhesive material of the wearable display device, and to simplify the assembly process of the wearable display device.

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

Hereinafter, the embodiment will be described in detail with reference to the attached drawings. Since the embodiments can be subject to various changes and 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 should be understood to include all changes, equivalents, and substitutes included in the spirit and technical 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”, “second”, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. Additionally, terms specifically defined in consideration of the configuration and operation of the embodiment are only for explaining the embodiment and do not limit the scope of the embodiment.

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

In addition, relational terms such as "top/top/top" and "bottom/bottom/bottom" used below 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.

Additionally, a rectangular coordinate system (x, y, z) can be used in the drawing. In the drawing, the x-axis and y-axis refer to planes perpendicular to the optical axis. For convenience, the optical axis direction (z-axis direction) can be referred to as the first direction, the x-axis direction can be referred to as the second direction, and the y-axis direction can be referred to as the third direction. .

The wearable display device of the embodiment is a device that can be worn like glasses on the human body and allows a person to view images transmitted from an external device relatively without restrictions in location. A device that serves as a source for transmitting images may be a smartphone or other mobile device, and may be connected to the wearable display device by wire or wirelessly.

At this time, in order to wear the wearable display device of the embodiment, it may be detachably attached to glasses, or may be attached to a separate wearing device that allows the user to wear it like glasses.

Figure 1 is a perspective view showing a wearable display device according to an embodiment. Figure 2 is an exploded perspective view showing a wearable display device according to an embodiment. Figure 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 spray unit 12, a display unit 13, a polarizer 14, a lens 15, a first prism 16, and a second prism. (17) may be included.

Additionally, the wearable display device of the embodiment may include a base 18, a cover member 19, and a fastening portion 22 to combine each of the above components into one bundle. Additionally, 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 played from the external device.

The light source unit 10 is electrically connected to the printed circuit board 20, and serves to first irradiate the image that is the object of playback transmitted from an external device through the printed circuit board 20 in the form of light. The light source unit 10 is a device that irradiates light and can be made of various things. For example, it can be made of LED, which is highly durable, generates little heat, and is small in size.

The light guide unit 11 may serve to adjust the optical path of the image emitted from the light source unit 10 toward the beam emitting unit 12. As shown in FIG. 3, when viewed from the light guide portion 11, the light source portion 10 and the beam emitting portion 12 are positioned at approximately right angles to each other. Therefore, in order to direct the light forming the image emitted from the light source unit 10 to the beam emitting unit 12, the light guide unit 11 may be formed with a plurality of grids provided at appropriate positions and angles within the light guide unit 11. there is.

In addition, the light guide unit 11 may serve to uniformly distribute the light emitted from the light source unit 10 to the beam emitting unit 12 due to the formation of the grid. Therefore, the light uniformly irradiated from the light guide 11 can be uniformly incident on the surface of the beam emitter 12 adjacent to the light guide 11.

The beam projection unit 12 irradiates the light incident from the light guide unit 11 to the display unit 13, and receives the image played back from the display unit 13 so that the user can see it with the naked eye. (15) can serve as an investigation.

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

To form such an optical path, the beam spraying unit 12 may be formed of, for example, a polarizing beam splitter (PBS). The polarized beam sprayer is formed by combining a plurality of gratings, and can be manufactured by forming a thin film capable of reflecting and/or diffracting light on each grating.

The display unit 13 plays the role of reproducing the light incident from the beam emitting unit 12 as an image that allows the user to specifically detect the shape with the naked eye. For example, the display unit 13 may be a reflective display that irradiates the reproduced image back to the beam emitting unit 12.

For example, such a reflective display has an Lcos type. The Lcos method is a reflective display that reproduces images by reflecting incident light. The Lcos method mainly uses silicon substrates as display elements, and high-resolution images can be displayed on a small display screen.

The polarizing plate 14 may serve to polarize light forming an image incident from the display unit 13. The polarizing plate 14 may transmit p-wave light and absorb s-wave light, which are components of light forming an incident image.

At this time, the p-wave is a light wave that vibrates in a direction parallel to the light incident plane, and the s-wave is a light wave that vibrates in a direction perpendicular to the light incident plane. In this case, the incident plane refers to the plane formed by the incident wave, reflected wave, and transmitted wave in the medium where light is incident.

Since the polarizing plate 14 transmits only p-wave light among the incident light, the light passing through the polarizing plate 14 and incident on the lens 15 has only the p-wave component. Of course, on the other hand, another type of polarizer 14 may be used so that the light that passes through the polarizer 14 and enters the lens 15 has only the s-wave component.

This polarizer 14 prevents the light forming the incident image from having a p-wave component and an s-wave component at the same time, causing interference between the light of the p-wave component and the light of the s-wave component, thereby deteriorating the image quality. It can be prevented.

Meanwhile, the light guide unit 11, like the polarizer 14, has a polarization function and polarizes the light incident from the light source unit 10 to prevent the p-wave component light and the s-wave component light from interfering with each other. This can prevent the image quality from deteriorating.

The lens 15 may serve to magnify the image by receiving light forming an image incident from the polarizer 14. In other words, the image formed by the light incident from the polarizer 14 is very small in size, making it inconvenient for the user to view the image as is. Accordingly, the lens 15 serves to enlarge this image to an appropriate size for the user to view with the naked eye.

Light that passes through the lens 15 and forms an enlarged image is incident on the first prism 16. At this time, in order to appropriately adjust the optical path incident from the lens 15 to the first prism 16, a refracting portion may be formed in a portion of the lens 15, if necessary. This refractive part can be formed, for example, by combining media with different densities with other parts of the lens 15.

The first prism 16 may serve to allow the image transmitted from the lens 15 to reach the user's eyeball E. To this end, the path of the light forming the image incident from the lens 15 must be appropriately adjusted. This adjustment of the 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 eyeball E, a reflective layer (not shown) that reflects light is used as shown below. It may also be formed on the first prism 16.

At this time, the image that passes through the first prism 16 from the lens 15 and enters the user's eyeball E is a virtual image. That is, unlike the real image, which refers to an image of an actual object located in front of the user's eyeball (E), this image is an image played on the display unit 13 that is not located in front of the user's eyeball (E), as described above. As the light is adjusted, it is an illusion that the user visually perceives as if it were located in front of the user's eyeball (E).

The optical path 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 information about the image to be played from an external device through the printed circuit board 20 and transmits the light containing the image to the light guide unit ( 11) to investigate. At this time, the light emitted from the light source unit 10 may contain RGB signals.

Next, the light guide unit 11 directs the light incident from the light source unit 10 toward the beam emitting unit 12 by adjusting its optical path. At this time, the light guide unit 11 may serve to uniformly distribute the light emitted from the light source unit 10 to the beam emitting unit 12 due to the formation of the grid. In addition, the light guide unit 11 has a polarization function and polarizes the light incident from the light source unit 10 to prevent the p-wave component light and the s-wave component light from interfering with each other, thereby deteriorating the image quality. It can also be prevented.

Next, the beam projection unit 12 irradiates the light incident from the light guide unit 11 to the display unit 13, allowing the user to specifically recognize the light incident on the display unit 13 with the naked eye. Allows playback of existing video.

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

Next, the beam emitting unit 12 causes light forming an image incident from the display unit 13 to enter the polarizing plate 14. At this time, the beam ejection unit 12 may be formed as a polarized beam ejector as described above in order to control the various optical paths.

Next, the polarizing plate 14 polarizes the light incident from the beam emitter 12 to form an image. At this time, the light transmits only one of the p-wave or s-wave and absorbs the remaining waves, so the light that passes through the polarizer 14 is polarized to have only one of the p-wave or s-wave. As mentioned above, this is to prevent image quality deterioration due to interference between p-waves and s-waves.

Next, the lens 15 receives the light forming the image incident from the polarizer 14 and magnifies it to a size appropriate for the user to view with the naked eye. At this time, as described above, a refracting portion may be formed in a portion of the lens 15 to adjust the optical path, and light passing through the refracting portion enters the first prism 16 at a set angle of incidence.

Next, the first prism 16 may serve to control the optical path of the image transmitted from the lens 15 and irradiate the light that ultimately forms the image to the user's eyeball E. At this time, adjustment of the optical path can be implemented 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 distortion of the real image reaching the user's eyeball E. Through the first prism 16, the user can simultaneously see a virtual image, which is an image played on the display unit 13, and a real image of an object in front of the user's eyeball E.

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

Therefore, by combining the second prism 17 with the end of the first prism 16 to extend the entire prism, distortion of the actual image due to the shape of the end of the first prism 16 can be reduced.

The base 18 is formed with a receiving space S, which serves to accommodate the light guide part 11, the beam emitting part 12, the display part 13, the polarizing plate 14, and the lens 15. You can. Since the base 18 accommodates several components of the embodiment, its shape may be complex. Therefore, the base 18 can be manufactured into such a complex shape using a method such as injection molding.

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

In addition, a protrusion 171 is formed on the upper surface of the cover member 19, and the groove or hole formed in the printed circuit board 20 is coupled to the protrusion 171, thereby attaching the printed circuit board (171) to the cover member 19. The upper part of 20) can be combined.

The 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. Due to this, the printed circuit board 20 can transmit the image signal that is the target of reproduction to the light source unit 10 and supply necessary power to the light source unit 10 and the display unit 13.

Meanwhile, grooves or holes may be formed at the top and bottom of the printed circuit board 20. Accordingly, the upper and lower parts of the printed circuit board 20 can be coupled to the protrusion 171 formed on the upper surface of the cover member 19 and the protruding part 171 formed on the lower surface of the base 18, respectively.

The connector 21 may serve to connect the printed circuit board 20 and an external device. At this time, the external device may be composed of a control device that controls the wearable display device of the embodiment, a storage device that records the image to be played, a communication device that can link the wearable display device with a mobile device such as a smartphone, etc. .

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

FIGS. 4A and 4B are diagrams for explaining the coupled state of the first prism 16 and the base 18 according to an embodiment. The prism is coupled to the base 18. In the embodiment, the first prism 16 is coupled to the base 18, and a fastening unit may be provided for coupling the first prism 16 and the base 18. .

At this time, the fastening unit may restrict the movement of the prism with respect to the base 18 by fastening a portion of the prism and a portion of the base 18 to each other. That is, in the embodiment, the fastening unit moves through the prism coupled to the base 18, such as rotating with respect to the base 18, and passes through each component and prism accommodated in the receiving space S of the base 18. Changes in the optical path and distortion can be significantly reduced. Therefore, the fastening unit has the effect of improving the performance of the wearable display device by stably maintaining the optical path.

In one embodiment, the fastening unit includes a plurality of engaging protrusions 110 formed at the end of the prism and the same number of engaging protrusions 110 at the portion corresponding to the engaging protrusion 110 at the end of the base 18. It may include an insertion portion 120 formed of . At this time, in one embodiment, the insertion portion 120 may be formed as a hole or groove into which the engaging protrusion 110 is inserted.

At this time, the coupling protrusion 110 is shown as a circular planar shape in FIG. 4A, but it is not limited thereto and may be formed in various shapes such as polygons such as triangles and squares, and ellipses.

In addition, in one embodiment of the fastening unit, as shown in FIGS. 4A and 4B, the coupling protrusion 110 is formed to protrude from the bottom surface 16a of the first prism 16, and the insertion portion 120 ) may be formed in a position corresponding to the engaging protrusion 110 in the lower part of the base 18.

At this time, it is appropriate that a plurality of coupling protrusions 110 are provided to limit rotation of the first prism 16 coupled to the base 18 with respect to the base 18. In addition, there are a plurality of coupling protrusions 110, and the number and position of the coupling protrusions 110 can 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 diagrams for explaining the coupled state of the first prism 16 and the base 18 according to another embodiment. In another embodiment of the fastening unit, as shown in FIGS. 5A and 5B, the coupling protrusion 110 is formed to protrude from one side 16b-1 of the first prism 16, and the insertion portion 120 ) may be formed on one side of the base 18 at a position corresponding to the engaging protrusion 110.

At this time, a light transmitting surface 163 is formed at the end of the first prism 16. As shown in FIG. 5A, in the embodiment, the light transmitting surface 163 is formed to be inclined in the longitudinal direction of the first prism 16. However, it is not limited to this, and may be formed perpendicular to the longitudinal direction of the first prism 16. The light transmitting surface 163 is a portion where light passing through the lens 15 enters the first prism 16.

FIGS. 6A and 6B are diagrams for explaining the coupled state of the first prism 16 and the base 18 according to another embodiment. In another embodiment of the fastening unit, as shown in FIGS. 6A and 6B, the coupling protrusion 110 is formed to protrude from the other side surface 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 engaging protrusion 110.

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

The engaging 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 an adhesive material.

Various types of adhesive materials can be used, but it is appropriate to use an epoxy-based material with good adhesive strength. Additionally, it is more appropriate to use ultraviolet (UV) curable epoxy to facilitate the operation.

Meanwhile, the coupling protrusion 110 is located 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 of the first prism 16. It is formed to protrude from each of (16b-2), and the insertion portion 120 is formed on the lower part and both sides of the base 18, that is, on one side of the base 18 and the other side of the base 18. 110) may be formed at positions corresponding to each other.

In addition, the insertion portion 120 is located 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 of the first prism 16. Each hole or groove is formed at (16b-2), and the engaging protrusion 110 is inserted into the lower part and both sides of the base 18, that is, one side of the base 18 and the other side of the base 18. They may be formed to protrude at positions corresponding to the portion 120, respectively.

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

In another embodiment of the fastening unit, the first concavo-convex portion 130 formed at the end of the first prism 16 and the portion corresponding to the first concave-convex portion 130 at the end of the base 18 are It may include a second concave-convex portion 140 formed to fit with the first concave-convex portion 130.

At this time, the shape of the first uneven part 130 and the second uneven part 140 is shown as a square in FIGS. 7A and 8A, but is not limited thereto and may be formed in various shapes such as a triangle or a wave shape.

In addition, as another embodiment of the fastening unit, as shown in FIGS. 7A and 7B, the first uneven portion 130 is formed on the bottom surface 16a of the first prism 16, and the second uneven portion 130 is formed on the bottom surface 16a of the first prism 16. The portion 140 may be formed to be fitted with the first concave-convex portion 130 at a portion corresponding to the first concave-convex portion 130 on the lower part of the base 18.

At this time, the first concavo-convex portion 130 is connected to the base 18 at the end of the bottom surface 16a of the first prism 16, and its length, width, location, number of concave portions or convex portions, etc. are appropriately selected. You can.

FIGS. 8A and 8B are diagrams for explaining the coupled state of the first prism 16 and the base 18 according to another embodiment. In another embodiment of the fastening unit, as shown in FIGS. 8A and 8B, the first uneven portion 130 is formed on one side 16b-1 of the first prism 16, and the second uneven portion 130 is formed on one side 16b-1 of the first prism 16. The portion 140 may be formed on one side of the base 18 to be fitted with the first concave-convex portion 130 at a portion corresponding to the first concave-convex portion 130 .

At this time, as described above with reference to FIG. 5A, a light transmitting surface 163 is formed at the end of the first prism 16. As shown in FIG. 8A, in the embodiment, the light transmitting surface 163 is formed at the end of the first prism 16. Although it is formed to be inclined in the longitudinal direction of the first prism 16, it is not limited to this and may be formed perpendicular to the longitudinal direction of the first prism 16.

FIGS. 9A and 9B are diagrams for explaining the coupled state of the first prism 16 and the base 18 according to another embodiment. In another embodiment of the fastening unit, as shown in FIGS. 9A and 9B, the first uneven portion 130 is formed on the other side 16b-2 of the first prism 16, and the second uneven portion 130 is formed on the other side 16b-2 of the first prism 16. The portion 140 may be formed to be fitted with the first concave-convex portion 130 at a portion corresponding to the first concave-convex portion 130 on the other side of the base 18.

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

The first uneven part 130 and the second uneven part 140 described in each of the above embodiments may be joined to each other by interference fit and/or an adhesive material.

The first uneven portion 130 is located 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. are respectively formed in the lower part and both sides of the base 18, that is, the first uneven part 130 and the second uneven part 130 on one side of the base 18 and the other side of the base 18. It may be formed to match the first concave-convex portion 130 at the corresponding portion.

According to the embodiment, when coupling the prism to the base 18, an adhesive material is not used, or a coupling unit, that is, a coupling protrusion 110 formed on the first prism 16 and the base 18, an insertion portion ( 120), the adhesive material is applied only to the first uneven portion 130 or the second uneven portion 140, thereby significantly reducing the use of adhesive material. Accordingly, it is possible to prevent the image quality of the playback image from being deteriorated due to the adhesive material of the wearable display device, and the assembly process of the wearable display device can be simplified.

Although only a few examples 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 can be combined in various forms unless they are incompatible technologies, and through this, can be implemented as a new embodiment.

10: Light source unit
11: light guide
12: Beam injection unit
13: Display unit
14: Polarizer
15: Lens
16: first prism
16a: Bottom surface of the first prism
16b-1: One side of the first prism
16b-2: Other side of the first prism
163: light transmitting surface
17: Second prism
18: base
19: Cover member
20: printed circuit board
21: connector
22: fastening part

Claims (11)

A base including a lower part and first and second sides connected to the lower part;
a first prism including a first end disposed between the first side and the second side of the base;
a fastening unit fastening the base and the first end of the first prism;
a cover member coupled to the upper part of the base; and
It includes a printed circuit board including a lower part coupled to the outer surface of the lower part of the base and an upper part coupled to the outer surface of the cover member,
The first end of the first prism is,
An entrance surface on which light is incident, a bottom surface facing the inner surface of the lower part of the base, a first side located on one side of the entrance surface and facing the inner surface of the first side of the base, and a bottom surface facing the inner surface of the lower part of the base, and and a second side located opposite the inner surface of the second side of the base,
The fastening unit is,
a first engaging protrusion formed on the bottom of the first end and protruding toward the inner surface of the lower portion of the base; and
A first insertion portion formed on the inner surface of the lower portion of the base and coupled to the first engaging protrusion,
The fastening unit is a wearable display device positioned between the inner surface of the lower portion of the base and the inner surface of the cover member. According to paragraph 1,
The first coupling protrusion includes a plurality of first coupling protrusions,
The first insertion unit is a wearable display device including a plurality of first insertion parts corresponding to the plurality of first coupling protrusions. According to paragraph 1,
A wearable display device wherein the first insertion portion is formed as a hole or groove. According to paragraph 1,
The first prism is a wearable display device including an emission surface disposed at a second end located opposite to the first end. According to paragraph 1,
A wearable display device comprising a second prism coupled to the first prism. According to clause 5,
A display unit that plays video; and
A wearable display device including a lens that transmits light forming an image reproduced in the display unit and makes it incident on the first prism. According to clause 6,
The first prism adjusts the optical path of the image transmitted from the lens to irradiate it to the user's eye,
The second prism is a wearable display device that reduces distortion of the real image reaching the eyeball of the user. According to paragraph 1,
The wearable display device wherein the incident surface of the first prism is formed to be inclined in the longitudinal direction of the first prism. According to paragraph 1,
The fastening unit is,
a second engaging protrusion formed on the first side of the first end of the first prism and protruding toward the inner surface of the first side of the base;
a second insertion portion formed on the inner surface of the first side of the base and coupled to the second engaging protrusion;
a third engaging protrusion formed on the second side of the first end of the first prism and protruding toward the inner surface of the second side of the base; and
A wearable display device comprising a third insertion portion formed on the inner surface of the second side of the base and coupled to the third coupling protrusion. According to clause 9,
The second coupling protrusion includes a plurality of second coupling protrusions, and the second insertion part includes a plurality of second insertion parts corresponding to the plurality of second coupling protrusions,
The third coupling protrusion includes a plurality of third coupling protrusions, and the third insertion part includes a plurality of third insertion parts corresponding to the plurality of third coupling protrusions. delete