Optical device for augmented reality

Abstract

The present application relates to an optical device for augmented reality, comprising: an optical unit that transmits at least a part of visible light, a first reflection part group composed of at least one reflection part, at least one reflection part of the first reflection part group being arranged in a row in a first direction on a surface or inside the optical unit, and a second reflection part group composed of at least one reflection part, at least one reflection part of the second reflection part group being arranged in a row in the first direction on the surface or inside the optical unit and being arranged in parallel with the reflection parts of the first reflection part group at a spacing apart in a second direction perpendicular to the first direction; the reflection parts reflecting image light emitted from an image exit part that emits image light corresponding to an augmented reality image toward a user's eye pupil, a horizontal line passing through the center of each reflection part of the second reflection part group and parallel to the second direction and a horizontal line passing through the center of each reflection part of the first reflection part group and parallel to the second direction being arranged in parallel in order.

Description

[0001] This application is a divisional application of patent application No. 2019800689852, filed on September 3, 2019, entitled "Optical device for augmented reality". TECHNICAL FIELD

[0002] The present application relates to an optical device for augmented reality, and more particularly to an optical device for augmented reality capable of providing an augmented reality image to a user using a plurality of small reflection parts. BACKGROUND

[0003] As is well known, augmented reality (AR) refers to superimposing a virtual image or image generated by a computer or the like on an actual image of the real world and providing it.

[0004] In order to implement such augmented reality, an optical system capable of superimposing a virtual image or image generated by a device such as a computer on an image of the real world and providing it is required. As such an optical system, there is a technology of using an optical unit such as a prism that reflects or refracts a virtual image by using a head-mounted display (HMD) or a glasses-type device.

[0005] However, a device using such a conventional optical system has the following problems: since it has a complicated structure and is relatively large in weight and volume, it is inconvenient for a user to wear, and the manufacturing process is also complicated, thereby increasing the manufacturing cost.

[0006] In addition, the conventional device has a limitation that a virtual image is not focused in the case where a focal length is changed when a user gazes at the real world. In order to solve such a problem, a technology of using a member such as a prism capable of adjusting a focal length of a virtual image or electrically controlling a variable focus lens according to a change in the focal length has been proposed. However, these technologies also have the following problems: in order to adjust the focal length, the user needs to perform an additional operation or a hardware and software such as an additional processor for controlling the focal length are required.

[0007] To solve the prior art problems as described above, as described in Patent Document 1, the present applicant has developed a device capable of projecting a virtual image to the retina through the pupil by using a reflection part smaller than the pupil of a person, thereby implementing augmented reality. According to this, an augmented reality implementation device is configured in the form of glasses, a reflection part is provided on the surface or inside of a lens of the glasses and a virtual image generated from a display part is reflected to project the image to the retina through the pupil, so that a depth of field is increased and a pin hole effect is provided, so that a clear virtual image can always be provided regardless of a change in focal length when a user gazes at the actual world. However, since this technology of the present applicant uses a small reflection part, it has a limitation of a narrow field of view.

[0008] [Prior Art Documents]

[0009] Korean Patent No. 10-1660519 (published on September 29, 2016) SUMMARY

[0010] Technical Problem to be Solved

[0011] The present application is to solve the problems as described above, and an object thereof is to provide an optical device for augmented reality capable of providing an augmented reality image by using a plurality of reflection parts smaller than a pupil.

[0012] In particular, another object of the present application is to provide an optical device for augmented reality capable of expanding a field of view and improving optical uniformity by using a plurality of reflection parts smaller than a pupil.

[0013] In addition, another object of the present application is to provide an optical device for augmented reality using a plurality of reflection parts, the distance between each reflection part being formed to be smaller than the size of a pupil, thereby having a wide field of view without interrupting an image of augmented reality.

[0014] In addition, another object of the present application is to provide an optical device for augmented reality capable of expanding a field of view and increasing an eyebox by using a plurality of reflection parts smaller than a pupil to deepen a depth of field, thereby being capable of producing a pin hole effect.

[0015] Means for Solving the Problem

[0016] To achieve the object as described above, there is provided an optical device for augmented reality, including: an optical unit for transmitting at least a part of visible light, a first reflection portion group composed of at least one reflection portion, the at least one reflection portion of the first reflection portion group being arranged in a row in a first direction as any straight line direction on a surface or inside of the optical unit, and a second reflection portion group composed of at least one reflection portion, the at least one reflection portion of the second reflection portion group being arranged in a row in the first direction on the surface or inside of the optical unit and being arranged in parallel at a spaced interval from the reflection portions of the first reflection portion group in a second direction perpendicular to the first direction; the reflection portions reflecting image light emitted from an image exit portion for emitting image light corresponding to an augmented reality image toward a pupil of a user's eye, a horizontal line passing through the center of each reflection portion of the second reflection portion group and parallel to the second direction and a horizontal line passing through the center of each reflection portion of the first reflection portion group and parallel to the second direction being arranged in parallel in order.

[0017] According to another aspect of the present application, there is provided an optical device for augmented reality, including: an optical unit for transmitting at least a part of visible light, and n reflection portion groups composed of at least one reflection portion, the at least one reflection portion being arranged in a row in a first direction as any straight line direction on a surface or inside of the optical unit, n being a natural number of 2 or more; the n reflection portion groups being arranged in parallel at a spaced interval in a second direction perpendicular to the first direction on the surface or inside of the optical unit, the reflection portions constituting the n reflection portion groups respectively reflecting image light emitted from an image exit portion for emitting image light corresponding to an augmented reality image toward a pupil of a user's eye, the reflection portions constituting a k-th reflection portion group among the n reflection portion groups being prominently arranged so that a height from a plane p constituted by the first direction and the second direction of the first reflection portion group to a direction perpendicular to the first direction and the second direction of the reflection portions of the k-th reflection portion group is higher than a height from the plane p to the direction perpendicular to the first direction and the second direction of reflection portions of a (k-1)-th reflection portion group, k being a natural number in a range of 2≤k≤n.

[0018] According to another aspect of the present application, there is provided an optical device for augmented reality, comprising: an optical unit for transmitting at least a part of visible light, a first reflection portion group composed of at least one reflection portion, the at least one reflection portion of the first reflection portion group being arranged in a row in a first direction as any straight line direction on a surface or inside of the optical unit, and a second reflection portion group composed of at least one reflection portion, the at least one reflection portion of the second reflection portion group being arranged in a row in the first direction on the surface or inside of the optical unit and being arranged in parallel at an interval from the reflection portion of the first reflection portion group in a second direction perpendicular to the first direction; the reflection portions reflecting image light emitted from an image exit portion for emitting image light corresponding to an augmented reality image toward a pupil of a user's eye, the reflection portions of the first reflection portion group and the second reflection portion group arranged side by side in the second direction being arranged so as to overlap only a part of an area when viewed in the second direction.

[0019] According to another aspect of the present application, there is provided an optical device for augmented reality, comprising: an optical unit for transmitting at least a part of visible light, a first reflection portion group composed of at least one reflection portion, the at least one reflection portion of the first reflection portion group being arranged in a row in a first direction as any straight line direction on a surface or inside of the optical unit, and a second reflection portion group composed of at least one reflection portion, the at least one reflection portion of the second reflection portion group being arranged in a row in the first direction on the surface or inside of the optical unit and being arranged in parallel at an interval from the reflection portion of the first reflection portion group in a second direction perpendicular to the first direction; the reflection portions of the first reflection portion group being formed of a semi-transparent material and passing and transmitting a part of image light emitted from an image exit portion for emitting image light corresponding to an augmented reality image to the reflection portions of the second reflection portion group, and reflecting a part of the image light emitted from the image exit portion toward a pupil of a user's eye, the reflection portions of the second reflection portion group reflecting the image light incident through the reflection portions of the first reflection portion group of the semi-transparent material toward the pupil of the user's eye.

[0020] According to another aspect of the present application, there is provided an optical device for augmented reality, comprising: an optical unit for transmitting at least a part of visible light, a first reflection portion group composed of at least one reflection portion, the at least one reflection portion of the first reflection portion group being arranged in a row in a first direction as any straight line direction on a surface or inside of the optical unit, and a second reflection portion group composed of at least one reflection portion, the at least one reflection portion of the second reflection portion group being arranged in a row in the first direction on a surface or inside of the optical unit and being arranged in parallel at an interval apart from the reflection portion of the first reflection portion group in a second direction perpendicular to the first direction; a through-hole capable of transmitting incident light being formed inside the reflection portion of the first reflection portion group, so that a part of image light emitted from an image exit portion for emitting image light corresponding to an augmented reality image is transmitted to the reflection portion of the second reflection portion group through the through-hole and a part of the image light emitted from the image exit portion is reflected toward a pupil of an eye of a user through a portion other than the through-hole, and the reflection portion of the second reflection portion group reflects the image light incident through the through-hole of the reflection portion of the first reflection portion group toward the pupil of the eye of the user.

[0021] The plurality of reflection portions can each be arranged at a distance of 8 mm or less from an adjacent reflection portion.

[0022] The distance between adjacent reflection portions can be the minimum value between points on a boundary line of an orthographic projection of a reflection portion onto a plane passing through the pupil and perpendicular to a front direction when the user gazes at the front.

[0023] The size of each of the plurality of reflection portions can be 8 mm or less.

[0024] The size of each of the plurality of reflection portions can be the maximum length between any two points on a boundary line of a reflection portion.

[0025] The size of each of the plurality of reflection portions can be the maximum length between any two points on a boundary line of an orthographic projection of a reflection portion onto a plane passing through the pupil and perpendicular to a front direction when the user gazes at the front.

[0026] The area of each of the plurality of reflection portions can be formed to have 16πmm 2 The following values.

[0027] The area of each of the plurality of reflection portions can be the area of an orthographic projection of a reflection portion onto a plane passing through the pupil and perpendicular to a front direction when the user gazes at the front.

[0028] The shape of each of the plurality of reflection portions can be formed as an asymmetric shape exhibiting a shape other than a point-symmetrical shape, the point-symmetrical shape referring to a shape for which there is a specific point that always has the same shape for all angles of rotation when the reflection portion is rotated around the specific point of the plane of the reflection portion, and the asymmetric shape referring to a shape that is not a point-symmetrical shape, i.e., a shape for which there is no specific point that always has the same shape for all angles of rotation when the reflection portion is rotated around the specific point of the plane of the reflection portion.

[0029] According to still another aspect of the present application, there is provided an optical device for augmented reality, comprising: an optical unit for transmitting at least a portion of visible light, a first reflection portion group composed of at least one reflection portion, the at least one reflection portion of the first reflection portion group being arranged in a row along a first direction as any straight line direction on a surface or inside of the optical unit, and a second reflection portion group composed of at least one reflection portion, the at least one reflection portion of the second reflection portion group being arranged in a row along the first direction and being arranged in parallel at a distance apart from the reflection portions of the first reflection portion group along a second direction perpendicular to the first direction; the reflection portions having a size of 8 mm or less, the reflection portions reflecting image light emitted from an image exit portion for emitting image light corresponding to an augmented reality image toward a pupil of a user's eye, a horizontal line passing through the center of each reflection portion of the second reflection portion group and parallel to the second direction and a horizontal line passing through the center of each reflection portion of the first reflection portion group and parallel to the second direction being arranged in parallel in a manner of being spaced apart from each other in order, the centers of the reflection portions constituting the first reflection portion group and the second reflection portion group not being arranged side by side along the second direction but being staggered from each other.

[0030] Effects of the Invention

[0031] According to the present application, it is possible to provide an optical device for augmented reality capable of providing an augmented reality image by using a plurality of reflection portions smaller than a pupil.

[0032] In addition, the present application has an effect of being capable of expanding a viewing angle and improving optical uniformity by using a plurality of reflection portions smaller than a pupil.

[0033] In addition, the present application is capable of providing an optical device for augmented reality using a plurality of reflection portions, the distance between the reflection portions being formed to be smaller than the size of a pupil, thereby having a wide viewing angle without interrupting an image of augmented reality.

[0034] In addition, according to the present application, it is possible to provide an optical device for augmented reality that deepens a depth of field by using a plurality of reflection portions smaller than a pupil, thereby being able to produce a pinhole effect while expanding a visual angle and increasing an eye movement range. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 FIG. 1 is a diagram showing a conventional optical device for augmented reality provided with one reflection portion 21.

[0036] Figure 2 FIG. 2 is a diagram showing the overall structure of an optical device for augmented reality 100 according to an embodiment of the present application.

[0037] Figure 3 FIG. 3 is a diagram showing an optical device for augmented reality 100 according to another embodiment of the present application.

[0038] Figure 4 FIG. 4 is a diagram showing the arrangement relationship of reflection portion groups 20A, 20B according to an embodiment of the present application. Figure 3

[0039] FIG. 5 shows still another embodiment of the optical device for augmented reality 100 of the present application. Figure 5

[0040] FIG. 6 shows still another embodiment of the optical device for augmented reality 100 of the present application. Figure 6

[0041] FIG. 7 shows still another embodiment of the optical device for augmented reality 100 of the present application. Figure 7

[0042] FIG. 8 shows still another embodiment of the optical device for augmented reality 100 of the present application. Figure 8

[0043] FIG. 9 is a diagram for explaining the principle that the distance of a plurality of reflection portions 21 to 24 needs to be smaller than the pupil size. Figures 9 to 11

[0044] FIG. 10 is a diagram for explaining the case where the pitch of reflection portions 21, 22, 23 is smaller than the size of a pupil 40. Figures 12 to 15

[0045] FIG. 11 is a diagram for explaining the case where the pitch of reflection portions 21, 22 is larger than the size of a pupil 40. Figures 16 to 18

[0046] FIG. 12 is a diagram exemplarily showing various shapes when the reflection portions 21 to 24 are viewed from the front. Figure 19

[0047] Figures 20 to 24 ​is a diagram for explaining optical uniformity of shapes of the plurality of reflecting portions 21 to 24 according to the present application. DETAILED DESCRIPTION

[0048] Hereinafter, an embodiment of the present application will be described in detail with reference to the drawings.

[0049] First, before describing the optical device 100 for augmented reality according to the present application, the basic principle of the present application will be described.

[0050] Figure 1 is a diagram showing a conventional optical device for augmented reality provided with one reflecting portion 21, similar to the contents disclosed in the above-mentioned prior art document filed and registered by the present applicant.

[0051] Referring to Figure 1 , the image exit portion 30 is a unit for emitting image light corresponding to an augmented reality image, and is a small-sized display device. The reflecting portion 21 reflects the image light emitted from the image exit portion 30 toward the pupil of the user to provide an augmented reality image.

[0052] The optical unit 10 is a unit like a spectacle lens, and the reflecting portion 21 is embedded in the inside thereof. The frame portion 31 is a unit for fixing and supporting the image exit portion 11 and the optical unit 10.

[0053] Figure 1 The reflecting portion 21 of is formed to have a size smaller than the size of the pupil of a person, i.e., to have a size of 8 mm or less. As described above, when the reflecting portion 21 is formed to have a size smaller than the size of the pupil, the depth of field of light incident to the pupil through the reflecting portion 21 can be made very deep. Here, the depth of field refers to a range recognized as being in focus. The deeper the depth of field, the deeper the focal distance of the augmented reality image, and thus, the focus of the augmented reality image is always recognized to be correct regardless of the change in the focal distance of the actual world while the user gazes at the actual world. This can be regarded as a kind of pin hole effect.

[0054] The present applicant has obtained a patent through the above-mentioned prior art document in consideration of the fact that if the reflecting portion 21 having a size smaller than the pupil as described above is used, the depth of field can be deepened, and using such a structure using a single reflecting portion 21 has an advantage of obtaining a pin hole effect by deepening the depth of field, but has a limitation of narrow field of view.

[0055] Therefore, the present applicant has disclosed a structure capable of expanding the field of view while maintaining the advantage of deepening the depth of field by using a plurality of reflecting portions 20 in order to solve such a limitation of narrow field of view.

[0056] Hereinafter, the optical device 100 for augmented reality according to the present application will be described in more detail.

[0057] Figure 2 FIG. 1 is a diagram for explaining an overall structure of an optical device 100 for augmented reality, Figure 2 (a) of FIG. 1 is a front view when the optical device 100 for augmented reality is placed in front of a user, Figure 2 (b) of FIG. 1 is a side view when the optical device 100 for augmented reality is placed in front of a user.

[0058] Referring to Figure 2 the optical device 100 for augmented reality (hereinafter, simply referred to as "optical device 100") of the present embodiment includes an optical unit 10 and a reflection portion group 20 composed of a plurality of reflection portions 21, 22, 23, and provides an augmented reality image to a user by reflecting image light emitted from an image emission portion 30 for emitting image light corresponding to the augmented reality image toward a pupil 40 of an eye of the user through the reflection portions 21, 22, 23 constituting the reflection portion group 20A.

[0059] The image emission portion 30 is a unit for emitting image light corresponding to the augmented reality image to the reflection portions 21, 22, 23 of the reflection portion group 20A, and for example, can be a display device such as a small LCD.

[0060] The display device is a unit for displaying the augmented reality image on a screen, and displays the augmented reality image in a manner that the light is emitted in a manner that the augmented reality image is reflected at the reflection portions 21, 22, 23 to be projected to the pupil of the user, and emits image light corresponding to the displayed augmented reality image and is transmitted to the reflection portions 21, 22, 23.

[0061] On the other hand, the image emission portion 30 can be a reflection unit or a refraction unit that reflects or refracts the image light emitted from the display device as described above and is transmitted to the reflection portions 21, 22, 23. In this case, the image light emitted from the display device is not directly emitted to the reflection portions 21, 22, 23, but is transmitted to the reflection portions 21, 22, 23 through the reflection unit or the refraction unit.

[0062] In addition, the image emission portion 30 can be a collimatior that emits the image light emitted from the display device as collimated parallel light. Alternatively, such a collimatior can be provided at the reflection unit or the refraction unit and the display device.

[0063] That is, the image emission portion 30 refers to various units such as a reflection or refraction unit that finally transmits the image light emitted from the display device displaying the augmented reality image to the reflection portions 21, 22, 23.

[0064] Here, the augmented reality image is an image displayed on the display device, and refers to a virtual image provided through the pupils of the user by the reflection of the plurality of reflection portions 21, 22, 23, and can be a still image or a video in the form of an image. Such an augmented reality image is emitted as corresponding image light, and is provided as a virtual image through the pupils of the user by the plurality of reflection portions 21, 22, 23, while the user receives an augmented reality service by receiving an image of the actual world directly recognized with the eyes.

[0065] On the other hand, in Figure 1 the image emission portion 30 is provided on the right side surface, but is not limited thereto, and can be provided on the upper portion, the lower portion, the diagonal upper and lower direction, etc. For example, when an augmented reality implementation device including the optical device 100 according to the present application is implemented in the form of, for example, glasses, the image emission portion 30 can be provided at an appropriate position of the glasses frame.

[0066] The display device can have only a function of receiving an image signal from an image playback device provided separately from the outside and simply displaying an image, or can be integrated with a device having a function of storing and playing back an image by a self-provided processor, memory, etc.

[0067] The display device itself is not a direct object of the present application, and a known device capable of displaying an image on a screen can be used, and thus a detailed description thereof will be omitted.

[0068] The optical unit 10 can be a lens that transmits at least a portion of visible light, and the plurality of reflection portions 21, 22, 23 are provided in a row inside or on the surface thereof.

[0069] Here, the transmission of at least a portion of visible light means that the transmittance of visible light is in the range of 0 to 100%. As Figure 2 indicated, when it is assumed that the optical device 100 is located in the front direction of the pupil 40 of the user's eye, such an optical unit 10 recognizes an image of the real world through the pupil 40, and reflects image light corresponding to an augmented reality image emitted from the image emission portion 30 through the reflection portions 21, 22, 23 and emits it to the pupil 40, and thus an augmented reality service can be provided by overlapping the image of the real world and the augmented reality image.

[0070] For example, as Figure 1 indicated, the optical unit 10 is implemented in the form of a quadrangular lens module, and such a lens module is detachably combined in an augmented reality device in the form of glasses, or when an augmented reality implementation device including the optical device 100 according to the present application is implemented in the form of glasses, it can be implemented in the form of a glasses lens.

[0071] On the other hand, the plurality of reflecting portions 21, 22, 23 reflect the image light corresponding to the augmented reality image, which is emitted from the image exit portion 30, toward the pupil 40 of the user's eye, thereby performing a function of providing the user with the augmented reality image, and such a plurality of reflecting portions 21, 22, 23 are arranged in a row in the first direction as any straight line direction on the surface or inside of the optical unit 10 and form a reflecting portion group 20A.

[0072] In Figure 1 , the reflecting portions 21, 22, 23 are arranged in a row in the first direction as the vertical direction, but this is merely exemplary, and can be arranged in the horizontal direction, the diagonal direction, or the like. The direction in which the reflecting portions 21, 22, 23 are arranged can be determined in accordance with the position of the image exit portion 30, but in fact, as Figure 1 described above, the reflecting portions 21, 22, 23 are arranged in the vertical direction and the optical unit 10 is rotated in a direction corresponding thereto at the position of the image exit portion 30.

[0073] As Figure 2 shown, the plurality of reflecting portions 21, 22, 23 reflect the image light corresponding to the augmented reality image, which is emitted from the image exit portion 30, toward the pupil 40, and superimpose and provide the augmented reality image and the image of the actual world, thereby making it possible to provide an augmented reality service. That is, the plurality of reflecting portions 21, 22, 23 can reflect the image light emitted from the image exit portion 30 toward the pupil 40 of the user's eye, to provide the user with the augmented reality image displayed on the display device.

[0074] To this end, the plurality of reflecting portions 21, 22, 23 are arranged to have an appropriate angle between the image exit portion 30 and the pupil 40. Preferably, the plurality of reflecting portions 21, 22, 23 are arranged to have an angle at which the image light incident on the center of the reflecting portion 21, 22, 23 is reflected and incident on the center of the pupil 40 when the plurality of reflecting portions 21, 22, 23 are located in front of the pupil 40 of the user, respectively.

[0075] For example, in Figure 2 , it is assumed that the plurality of reflecting portions 21, 22, 23 are located in the front direction of the pupil 40 and the image exit portion 30 is located to the right of the front direction of the pupil 40 when the user gazes straight ahead, and in this case, as shown in (a) of Figure 2 , each reflecting portion 21, 22, 23 has an inclination of about 45 degrees and is arranged obliquely to the outside of the front direction of the pupil 40.

[0076] On the other hand, in Figure 2 , as Figure 1The size of each of the plurality of reflective parts 21, 22, and 23 is preferably smaller than the size of a human pupil. That is, the size of each of the plurality of reflective parts 20 is preferably 8 mm or less. Here, the size of the reflective parts 21, 22, and 23 refers to the maximum length between any two points on the boundary line of each reflective part 21, 22, and 23.

[0077] Here, the dimensions of the reflective parts 21, 22, and 23 can be the maximum length between any two points on the boundary line of the orthographic projection of the reflective parts 21, 22, and 23 onto a plane passing through the pupil 40 and perpendicular to the frontal direction when the user is gazing at the front.

[0078] Alternatively, the reflective parts 21, 22, and 23 may not be located at the center of the user's pupil 40 in the front direction. In this case, the size of the reflective parts 21, 22, and 23 may be the maximum length between any two points on the boundary line of the orthographic projection of the reflective parts 21, 22, and 23 onto a plane passing through the pupil 40 and perpendicular to the direction of the reflective parts 21, 22, and 23 when the user gazes in the direction of the reflective parts 21, 22, and 23.

[0079] On the other hand, the dimensions of each of the plurality of reflective parts 21, 22, 23 are preferably all the same, but do not necessarily have to be the same, and can be partially changed according to requirements.

[0080] In addition, Figure 2 In the embodiments, the areas of the plurality of reflective portions 21, 22, and 23 are preferably formed to be smaller than the area of ​​the human pupil 30. For example, when the human pupil is circular, the diameter of the pupil can be 2–8 mm, and the radius can be 1–4 mm. Therefore, according to π·r 2 According to the formula, the maximum area of ​​the pupil is 16π mm. 2 This allows the area of ​​each of the multiple reflective parts 21, 22, and 23 to be formed to have an area of ​​16π mm. 2 The following values.

[0081] Here, the area of ​​each of the plurality of reflective parts 21, 22, 23 can be the area of ​​the orthographic projection formed when the user gazes at the front, by projecting each reflective part 21, 22, 23 onto a plane passing through the pupil 40 and perpendicular to the frontal direction.

[0082] Alternatively, the reflective parts 21, 22, and 23 may not be located at the center of the user's pupil. In this case, the area of ​​each of the reflective parts 21, 22, and 23 may be the area of ​​the orthographic projection of the reflective parts 21, 22, and 23 onto a plane passing through the pupil 40 and perpendicular to the direction of the reflective parts 21, 22, and 23 when the user gazes in the direction of the reflective parts 21, 22, and 23.

[0083] On the other hand, the area of each of the plurality of reflecting portions 21, 22, 23 is preferably all the same, but does not necessarily have to be the same, and can be partially changed as needed.

[0084] In Figure 2 Embodiments, since the plurality of reflecting portions 21, 22, 23 are provided longitudinally, a wider field of view can be ensured longitudinally, and when a laterally wide field of view is needed, the Figure 1 Embodiments, the optical unit 10 is rotated 90 degrees, and the image exit portion 30 can be located at the upper portion or the lower portion.

[0085] Figure 3 is a diagram showing another embodiment of the optical device 100 for augmented reality of the present application, Figure 3 (a) of FIG. 1 is an elevation view when the optical device 100 for augmented reality is placed in a front view of a user, Figure 3 (b) of FIG. 1 is a side view when the optical device 100 for augmented reality is placed in a front view of a user.

[0086] Figure 3 Embodiments, is characterized in that two reflecting portion groups 20A, 20B as described in Figure 2 are provided, and the centers of the reflecting portions constituting each reflecting portion group 20A, 20B are not provided side by side in a second direction perpendicular to the first direction but are alternately provided with each other.

[0087] That is, in the optical device 100 for augmented reality of the Figure 3 Embodiments, as described in Figure 2 , a first reflecting portion group 20A composed of at least one reflecting portion 21, 22 is provided, the reflecting portions 21, 22 are provided in a row in a first direction as any straight line direction on the surface or inside of the optical unit 10, and a second reflecting portion group 20B composed of at least one reflecting portion 23, 24 is provided, the reflecting portions 23, 24 are provided in a row in the first direction on the surface or inside of the optical unit 10, and are provided in parallel at an interval apart from the reflecting portions 21, 22 of the first reflecting portion group 20A in a second direction perpendicular to the first direction.

[0088] As described in Figure 2 , each of the reflecting portions 21, 22, 23, 24 reflects image light emitted from the image exit portion 30 toward the pupil of the user's eye, the image exit portion 30 emits image light corresponding to an augmented reality image.

[0089] Here, a horizontal line passing through the center of each reflecting portion 23, 24 of the second reflecting portion group 20B and parallel to the second direction and a horizontal line passing through the center of each reflecting portion 21, 22 of the first reflecting portion group 20A and parallel to the second direction are provided in parallel in order.

[0090] Figure 4 is a diagram for illustrating Figure 3 the positional relationship of the reflection portion groups 20A, 20B of the embodiment.

[0091] As shown in Figure 4 , a horizontal line (first second straight line) passing through the center of the first reflection portion 23 from the top of the second reflection portion group 20B and parallel to the second direction perpendicular to the first direction and a horizontal line (first first straight line) passing through the center of the first reflection portion 21 from the top of the first reflection portion group 20A and parallel to the second direction are parallel to each other, and the first first straight line and a parallel line (second second straight line) passing through the center of the second reflection portion 24 from the top of the second reflection portion group 20B and parallel to the second direction are parallel to each other. In this way, it can be seen that the horizontal lines passing through the centers of the respective reflection portions constituting the first reflection portion group 20A and the second reflection portion group 20B and parallel to the second direction perpendicular to the first direction are arranged in parallel in order.

[0092] Here, the distance of the first straight line and the second straight line is preferably the same.

[0093] As described in the embodiment of the foregoing Figure 2 , the conditions of the size, area, and the like of the respective reflection portions are applied to the embodiments of Figure 3 and Figure 4 in the same way.

[0094] According to the embodiments of Figure 3 and Figure 4 , the exit light (incident light) from the image exit portion 30 can not overlap the reflection portions 21, 22 of the first reflection portion group 20A, and pass through the space between the adjacent reflection portions 21, 22 of the first reflection portion group 20A to the reflection portions 23, 24 of the second reflection portion group 20B.

[0095] Therefore, it is possible to have the advantage of ensuring a wider field of view not only in the longitudinal direction but also in the lateral direction.

[0096] In the embodiments of Figure 3 and Figure 4 , the respective reflection portion groups 20A, 20B are shown as being constituted by two reflection portions, but this is merely an example, and can be constituted by one reflection portion or more than three reflection portions.

[0097] Figure 5 shows still another embodiment of the optical device 100 for augmented reality of the present application, Figure 5 (a) is a front view when the optical device 100 for augmented reality is placed in the front of the user, Figure 5 (b) is a side view when the optical device 100 for augmented reality is placed in the front of the user.

[0098] Figure 5 Embodiments similar to Figure 3 and Figure 4 Embodiments characterized in that the centers of the reflection portions constituting the reflection portion groups 20A, 20B are arranged side by side in a second direction perpendicular to the first direction, and the reflection portions of the second reflection portion group 20B are protrusively arranged closer to the pupil 40 side. In Figure 5 Embodiments, the reflection portion groups can be two or more n (here, n is a natural number of 2 or more), but for convenience of explanation, only two reflection portion groups 20A, 20B are shown.

[0099] That is, Figure 5 Embodiments characterized in that n reflection portion groups 20A, 20B (here, n is a natural number of 2 or more) constituted by at least one reflection portion 21, 22, 23, 24 arranged in a row in a first direction as any straight line direction on a surface or inside of an optical unit 10 are arranged side by side at intervals in a second direction perpendicular to the first direction on the surface or inside of the optical unit 10, and the reflection portions constituting the kth reflection portion group among the n reflection portion groups are protrusively arranged so that the height of the reflection portions of the kth reflection portion group from a plane p constituted by the first direction and the second direction of the first reflection portion group 20A to a direction perpendicular to the first direction and the second direction is higher than the height of the reflection portions constituting the (k-1)th reflection portion group from the plane p to the direction perpendicular to the first direction and the second direction. Here, k is a natural number in the range of 2 ≤ k ≤ n.

[0100] Here, the first reflection portion group 20A refers to the reflection portion group 20A located at the closest distance from the image exit portion 30, and therefore, k increases in the direction away from the image exit portion 30 from the second reflection portion group 20A, which is located at the closest distance from the image exit portion 30, except for the first reflection portion group 20A.

[0101] Referring to Figure 5 , since the height of the first reflection portion group 20A from a plane p constituted by the first direction and the second direction to a direction perpendicular to the first direction and the second direction is 0, and the height of the second reflection portion group 20B from the plane p to the direction perpendicular to the first direction and the second direction is h, it can be seen that the height of the second reflection portion group 20B with respect to the plane p is higher than that of the first reflection portion group 20A, which is protrusively formed.

[0102] That is, Figure 5 Embodiments characterized in that the reflection portion groups 20A, 20B are arranged in sequence so as to be arranged in a height gradually increasing, that is, closer to the pupil 40, thereby not blocking the light path from the image exit portion 30.

[0103] According to the configuration as described above, the plurality of reflection sections 21, 22, 23, 24 constituting the n reflection section groups 20A, 20B can each reflect the image light emitted from the image exit section 30 for emitting the image light corresponding to the augmented reality image toward the pupil 40 of the user's eye.

[0104] On the other hand, it is also possible to provide the reflection section groups 20A, 20B in sequence so as to be provided with a gradually lower height, i.e., further from the pupil 40, thereby not blocking the light path from the image exit section 30.

[0105] In the embodiment described above, Figure 5 In the embodiment described above, if the number of n is increased, the angle of view is widened, but correspondingly, the thickness is increased, and when the thickness is increased, the volume is increased and the weight is increased, so it is necessary to select an appropriate range.

[0106] In the embodiment described above, Figure 5 In the embodiment described above, each reflection section group 20A, 20B is shown as being constituted by two reflection sections, but this is merely an example, and it can be constituted by one reflection section, or it can be constituted by three or more reflection sections.

[0107] Figure 6 Another embodiment of the optical device 100 for augmented reality of the present application is shown, Figure 6 (a) of FIG. 10 is a front view when the optical device 100 for augmented reality is placed in the front of the user, Figure 6 (b) of FIG. 10 is a side view when the optical device 100 for augmented reality is placed in the front of the user.

[0108] As described in the embodiment of Figure 3 , the embodiment described above, Figure 6 The embodiment described above is characterized in that two reflection section groups 20A, 20B are constituted, which are provided side by side in a second direction, and a pair of reflection sections of the first reflection section group 20A and the second reflection section group 20B provided side by side in the second direction, as shown in Figure 6 (c) of FIG. 10, are constituted so as to overlap only a part of the area.

[0109] That is, as explained in Figure 3 , the embodiment described above is characterized in that a first reflection section group 20A and a second reflection section group 20B are provided, and reflection sections 23, 24 of the second reflection section group 20B and reflection sections 21, 22 of the first reflection section group 20A are provided side by side in a manner lying on a horizontal line parallel to a second direction, and a pair of reflection sections 21, 23 and 22, 24 of the first reflection section group 20A and the second reflection section group 20B provided side by side in the second direction, when viewed in the second direction, are constituted so as to overlap only a part of the area.

[0110] According to the configuration as described above, each of the reflection portions 21, 22, 23, and 24 reflects the image light emitted from the image exit portion 30, which is for emitting the image light corresponding to the augmented reality image, toward the pupil of the user's eye.

[0111] Here, the image exit portion 30 is provided in the second direction.

[0112] In Figure 6 (c) of FIG. 10, the black portion is a region in which the reflection portion 21 of the first reflection portion group 20A and the reflection portion 23 of the second reflection portion group 20B overlap with each other, and thus the image light is not transmitted to the reflection portion 20 of the second reflection portion group 20B. The reflection portion 23 of the second reflection portion group 20B cannot reflect the image light from the image exit portion 30 toward the pupil 30 in the region where the reflection portions overlap, but can transmit the image light corresponding to the region to the pupil 30 through the reflection portion 21 of the first reflection portion group 20A. Thus, in total, the cross-shaped augmented reality image can be projected to the pupil 30 of the user.

[0113] Figure 6 The shapes of the reflection portions 21, 23 and 22, 24 formed of right-angled quadrangles provided in a lateral and longitudinal staggered manner are shown, but other figures such as triangles other than this can be provided in a staggered manner.

[0114] Further, in Figure 6 , the pair of reflection portions provided side by side in the second direction is shown as a pair of right-angled quadrangles of the same shape by rotation, but this is only an example, and can be configured by completely different shapes. For example, when the reflection portions 21, 22 are viewed from the front, the reflection portion 21 of the first reflection portion group 20A is a triangle, and the reflection portions 23, 24 of the second reflection portion group 20B can be in the shape of a quadrangle or a circle, or the like.

[0115] That is, when viewed from the second direction, as shown in (c) of FIG. 10, only a part of the region overlaps, regardless of the specific shape of each reflection portion. However, when viewed from the second direction, it is not appropriate that the reflection portions completely overlap, because the image light cannot be transmitted to the reflection portion on the back side. Figure 6

[0116] Further, in the embodiment of Figure 6 , the reflection portions 21, 22, 23, and 24 included in each of the reflection portion groups 20A and 20B are shown as having the same shape and rotational relationship, but this is only an example, and the reflection portions included in each of the reflection portion groups can have other shapes and rotational relationships.

[0117] In the embodiment of Figure 6 , each of the reflection portion groups 20A and 20B is shown as being configured by two reflection portions, but this is only an example, and can be configured by one reflection portion, or can be configured by three or more reflection portions. ​

[0118] Figure 7 Fig. 1 shows a further embodiment of the optical device 100 for augmented reality according to the present application, Figure 7 (a) is a front view when the optical device 100 for augmented reality is placed in a front view of a user, Figure 7 (b) is a side view when the optical device 100 for augmented reality is placed in a front view of a user.

[0119] Figure 7 The embodiment according to Figure 6 is characterized in that two reflection part groups 20A, 20B composed of at least one reflection part 20 as described above are provided, but the reflection parts 21, 22 of the first reflection part group 20A are formed of a semi-transparent material so that a part of the image light emitted from an image exit part 30 for emitting image light corresponding to an augmented reality image is passed through and transmitted to the reflection parts 23, 24 of the second reflection part group 20B, which reflects a part of the image light incident through the semi-transparent reflection parts 21, 22 of the first reflection part group 20A to the pupil 40 of the user's eye.

[0120] Here, the reflection parts 23, 24 of the second reflection part group 20B can also be formed of a semi-transparent material.

[0121] Here, the semi-transparent material refers to a half mirror having a property of reflecting a part of the incident image light but passing a part of the incident image light. Since such a half mirror of a semi-transparent material is a known prior art per se, a detailed description thereof will be omitted here.

[0122] According to the embodiment according to Figure 7 , since the reflection parts 21, 22 of the first reflection part group 20A are formed of a semi-transparent material, a part of the incident light is directly passed through, and the passed incident light can be reflected at the reflection parts 23, 24 of the second reflection part group 20B and transmitted to the pupil 30.

[0123] In the embodiment according to Figure 7 , each reflection part group 20A, 20B is shown as being composed of two reflection parts, but this is only an example, and can be composed of one reflection part or more than three reflection parts.

[0124] In addition, only two reflection part groups are shown in the embodiment according to Figure 7 , but can be formed of more than three reflection part groups. In this case, there are a plurality of second reflection part groups 20B.

[0125] Figure 8This illustration shows yet another embodiment of the optical device 100 for augmented reality according to the present invention. Figure 8 (a) is a front view of the optical device 100 for augmented reality when placed in front of the user for viewing. Figure 8 (b) is a side view of the optical device 100 for augmented reality placed in front of the user.

[0126] Figure 8 The embodiment is characterized in that it is configured as follows Figure 6 The two reflective portion groups 20A and 20B, each consisting of at least one reflective portion 20, have through holes 211 and 221 formed inside the reflective portions 21 and 22 of the first reflective portion group 20A, allowing incident light to pass through. A portion of the image light emitted from the image emission portion 30 is transmitted through the through holes 211 and 221 to the reflective portions 23 and 24 of the second reflective portion group 20B. The portion of the image light emitted from the image emission portion 30 is reflected by the pupil 40 of the user's eye, except for the through holes 211 and 221. The image emission portion 30 is used to emit image light corresponding to the augmented reality image.

[0127] Here, since no through holes are formed in the reflective portions 23 and 24 of the second reflective portion group 20B, the image light incident through the through holes 211 and 221 of the reflective portions 21 and 22 of the first reflective portion group 20A is reflected towards the pupil of the user's eye.

[0128] exist Figure 8 In the embodiments, each reflective part group 20A, 20B is shown to be composed of two reflective parts, but this is only an example and can be composed of one reflective part or more than three reflective parts.

[0129] On the other hand, in the embodiment described above, the plurality of reflective parts 21 to 24 are respectively arranged such that the distance d between them and the adjacent reflective parts 21 to 24 is less than the size of a human pupil 40.

[0130] Typically, the average size (diameter) of a human pupil is in the range of 2 to 8 mm. Therefore, the plurality of reflective parts 21 to 24 of the present invention are preferably arranged such that the distance between them and the adjacent reflective parts 21 to 24 is 8 mm or less.

[0131] Here, the distance d (or spacing d) between the reflective parts 21 to 24 can be the minimum value between points on the boundary lines of adjacent reflective parts 21 to 24 when multiple reflective parts 21 to 24 are viewed from the front.

[0132] Further, the distance d (or the interval d) between the reflection portions 21 to 24 can be the minimum value between points on the boundary line of the orthographic projection of the reflection portions 21 to 24 onto a plane passing through the pupil 40 and perpendicular to the direction of the front surface when the user gazes in the direction of the front surface.

[0133] Further, the reflection portions 21 to 24 can not be provided at the center portion in the direction of the front surface of the pupil of the user, and in this case, the distance d (or the interval d) between the reflection portions 21 to 24 can be the minimum value between points on the boundary line of the orthographic projection of the reflection portions 21 to 24 onto a plane passing through the pupil 40 and perpendicular to the direction of the reflection portions 21 to 24 when the user gazes in the direction of the reflection portions 21 to 24.

[0134] On the other hand, the distance d between the plurality of reflection portions 21 to 24 is preferably the same throughout, but need not necessarily be the same, and can be partially changed as needed.

[0135] On the other hand, in the embodiment, the size of the plurality of reflection portions 21 to 24 is preferably smaller than the size of the pupil of a person. That is, the size of each of the plurality of reflection portions 21 to 24 is preferably 8 mm or less. Here, the size of the reflection portions 21 to 24 is defined as the maximum length between any two points on the boundary line of the orthographic projection of each of the reflection portions 21 to 24.

[0136] Here, the size of the reflection portions 21 to 24 can be the maximum length between any two points on the boundary line of the orthographic projection of the reflection portions 21 to 24 onto a plane passing through the pupil 40 and perpendicular to the direction of the front surface when the user gazes in the direction of the front surface.

[0137] Further, the reflection portions 21 to 24 can not be provided at the center portion in the direction of the front surface of the pupil of the user, and in this case, the size of the reflection portions 21 to 24 can be the maximum length between any two points on the boundary line of the orthographic projection of the reflection portions 21 to 24 onto a plane passing through the pupil 40 and perpendicular to the direction of the reflection portions 21 to 24 when the user gazes in the direction of the reflection portions 21 to 24.

[0138] On the other hand, the size of each of the plurality of reflection portions 21 to 24 is preferably the same throughout, but need not necessarily be the same, and can be partially changed as needed.

[0139] Further, in the present application, the area of the plurality of reflection portions 21 to 24 is preferably formed to be smaller than the area of the pupil 40 of a person. For example, when the pupil of a person is circular, the diameter of the pupil can be 2 to 8 mm, and the radius can be 1 to 4 mm, and thus according to the formula of π · r 2 , the area of the pupil is at most 16π mm 2 , and thus the area of each of the plurality of reflection portions 21 to 24 can be formed to have an area of 16π mm 2The following values.

[0140] Here, the area of each of the plurality of reflecting portions 21 to 24 can be the area of the orthographic projection of each reflecting portion 21 to 24 onto a plane passing through the pupil 40 and perpendicular to the direction of the front surface when the user gazes at the front surface.

[0141] In addition, the reflecting portions 21 to 24 can also not be provided at the center portion of the direction of the user's pupil front surface, and in this case, the area of each reflecting portion 21 to 24 can be the area of the orthographic projection of the reflecting portion 21 to 24 onto a plane passing through the pupil 40 and perpendicular to the direction of the reflecting portion 21 to 24 when the user gazes at the direction of the reflecting portion 21 to 24.

[0142] On the other hand, the area of each of the plurality of reflecting portions 21 to 24 is preferably all the same, but does not necessarily have to be the same, and can be partially changed as needed.

[0143] On the other hand, for example, when the augmented reality device is implemented in the form of glasses, the plurality of reflecting portions 21 to 24 can be provided on the surface of the glasses lens or can be provided in an embedded type inside the glasses lens, at which time the glasses lens becomes the optical unit 10.

[0144] Hereinafter, with reference to Figures 9 to 18 The principle that the distance of the plurality of reflecting portions 21 to 24 should be less than the pupil size will be described.

[0145] As Figure 9 indicated, the image light of the augmented reality image radiated from the image exit portion 30 is reflected at the reflecting portion 21 and imaged on the retina through the pupil 40, whereby the user can recognize the augmented reality image.

[0146] In Figure 9 , incident light 1, incident light 2, and incident light 3 indicate incident light having different angles of incidence with respect to the eyeball from each other, and it is assumed that each incident light is collimated parallel light. Depending on the angle of incidence to the eyeball, the position on the retina at which the collimated parallel light is imaged differs, but a person cannot distinguish the difference in the position at which the incident light is incident on the actual pupil 40. That is, as long as the position of the angle of incidence of the parallel light with respect to the eyeball is the same, even if another position of the pupil 40 is passed through, the same position on the retina is imaged, and if the position of the angle of incidence with respect to the eyeball is different, another position on the retina is imaged regardless of the position of the pupil 40.

[0147] Figure 10 is a diagram for explaining the size of the augmented reality image seen through one reflecting portion 21.

[0148] As Figure 9The incident light incident through the reflector 21 is imaged onto the retina according to the incident angle relative to the eyeball, and the size of the augmented reality image can be determined by the position of the incident light incident from the reflector 21 through the outermost position of the pupil 40 onto the retina.

[0149] exist Figure 10 In the case where the size of the augmented reality image observed by the user through the reflective part 21 is s i , then s i It can be represented by the following equation.

[0150] [Equation 1]

[0151]

[0152] [Equation 2]

[0153]

[0154] d a Pupil size 40

[0155] d o Location of augmented reality images

[0156] d m Eye relief (the distance between the reflex zone 20 and the pupil 40)

[0157] s m Dimensions of reflector 21

[0158] m: Center deviation due to the size of the reflector 21

[0159] Equation 1 is defined by the triangle formed between the reflector 21 and the pupil 40, and the size s of the reflector 21 and the augmented reality image. i It can be derived from the proportional equation. That is, it can be derived from... The relationship is used to derive it.

[0160] Furthermore, Equation 2 is derived from the proportional equations of the triangle formed between the reflective part 21 and the pupil 40, and the triangle formed by the reflective part 21. That is, since If we rearrange m, we can obtain [Equation 2].

[0161] Figure 11 This is a diagram used to illustrate the spacing between reflectors 21 and 22 when two reflectors 21 and 22 are provided.

[0162] exist Figure 11 In the middle, s sThe size when the augmented reality image is observed from the center position of the interval between the two adjacent reflecting portions 21, 22 can be defined as s. In order to continuously observe the augmented reality image by the two reflecting portions 21, 22, s s needs to be equal to or smaller than s i . This can be expressed by the following equation.

[0163] [Equation 3]

[0164]

[0165] On the other hand, the interval g between the reflecting portions 21, 22 can be defined based on the proportion equation of a triangle as follows m .

[0166] [Equation 4]

[0167]

[0168] Here, since d o is always larger than d m , it can be seen that the interval between the reflecting portions 21, 22 is smaller than d a , d a is the size of the pupil 40.

[0169] Figures 12 to 15 is a diagram for explaining a case where the interval of the reflecting portions 21, 22, 23 is smaller than the size of the pupil 40.

[0170] In Figure 12 , the interval between the reflecting portions 21, 22, 23 is set to be smaller than the size of the pupil 40, here, since the incident angles of the incident light with respect to the eyeball are all the same, it can be seen that the images are formed on the same position of the retina.

[0171] As Figure 12 shown, since the two adjacent reflecting portions are set to be smaller than the size of the pupil 40, the lower reflecting portion 23 is moved away from the pupil 40 while the upper reflecting portion 22 overlaps the pupil 40, and the incident light reflected from each reflecting portion 22, 23 is imaged on the same position of the retina.

[0172] In this state, if the user moves the pupil upward, it becomes a state as shown in Figure 13 , in this case, only the incident light from the reflecting portion 22 located in the middle reaches the retina, if the pupil is moved upward again, it becomes a state as shown in Figure 14 , as in Figure 12 , the incident light is imaged on the same position of the retina by the uppermost reflecting portion 21 and the reflecting portion 22 located in the middle.

[0173] Figure 15An augmented reality image that a user observes when three reflecting portions are disposed at a distance smaller than the size of the pupil 40 is shown.

[0174] As shown in Figure 15 , since the distance s s between the centers of the reflecting portions is smaller than the size s i of the image observed by one reflecting portion, that is, the distance between the reflecting portions is set to be smaller than the size of the pupil 40, in this case, the user can constantly receive other forms of augmented reality images through the reflecting portions.

[0175] Figures 16 to 18 is a view for explaining a case where the pitch of the reflecting portions 21, 22 is larger than the size of the pupil 40.

[0176] In Figure 16 , the pitch between the reflecting portions 21, 22 has a value larger than the size of the pupil 40, as shown in Figure 16 , in a state where the image is formed on the retina by the lower reflecting portion 22, if the user moves the pupil upward, it becomes a state as shown in Figure 17 , in this case, the incident light is not imaged on the retina through any one of the upper and lower reflecting portions 21, 22. Therefore, as shown in Figure 18 , the user observes an augmented reality image in which a break occurs in the middle.

[0177] On the other hand, according to other features of the present application, when viewed from the front, the shape of each of the plurality of reflecting portions 21 to 24 can be formed in a shape such as a circular shape, a quadrangular shape, a triangular shape, or the like, but is not limited thereto, and can have any other arbitrary shape.

[0178] Figure 19 is an exemplary view showing a variety of shapes when the reflecting portions 21 to 24 are viewed from the front. In addition to Figure 19 the forms of the reflecting portions 21 to 24 shown in , other forms can also be applied to the present application.

[0179] In particular, the shape of each of the plurality of reflecting portions 21 to 24 can be formed in an asymmetric shape that exhibits a shape other than a point-symmetrical shape.

[0180] Here, the point-symmetrical shape refers to a shape in which, when the reflecting portion is rotated around a specific point of the plane of the reflecting portion, there is a specific point that always has the same shape for all rotation angles, and the asymmetric shape refers to a shape that is not a point-symmetrical shape, that is, a shape in which, when the reflecting portion is rotated around a specific point of the plane of the reflecting portion, there is no specific point that always has the same shape for all rotation angles.

[0181] Examples of the point-symmetrical shape can include a circular shape or a donut shape, and examples of the asymmetrical shape can include a triangular shape, a quadrangular shape, an elliptical shape, a pentagonal shape, a hexagonal shape, and other irregular shapes.

[0182] For example, a circle is a point-symmetrical shape because it has the same shape for all angles of rotation when rotation is taken as a reference from the center point of the circle. In addition, a circular shape with a hole formed in the inside of a donut shape is also a point-symmetrical shape.

[0183] On the other hand, although an equilateral triangle is the same as the original shape when rotated 120 degrees, 240 degrees, and 360 degrees from the center, it has a different shape from the original shape at other angles, and thus cannot be considered to have the same shape for all angles. Therefore, in the present application, an equilateral triangle is classified as an asymmetrical shape, not a point-symmetrical shape.

[0184] In addition, although a regular quadrangle is the same as the original shape whenever it is rotated 90 degrees from the center point, it has a different shape from the original shape at other angles, and thus is classified as an asymmetrical shape, not a point-symmetrical shape, in the present application.

[0185] In addition, the plurality of reflecting portions 21 to 24 do not need to be all the same shape, and at least a part thereof can be a different shape.

[0186] Figures 20 to 24 is a graph for explaining optical uniformity of the shapes of the plurality of reflecting portions 21 to 24 according to the present application.

[0187] In Figures 20 to 24 the lower end, the graphs shown are each a front view showing a setting form of the plurality of reflecting portions 21 to 24 when a user looks at the plurality of reflecting portions 21 to 24 in the front, and the graph at the upper end is a graph showing the luminance of each reflecting portion 21 to 24 in a case where the setting structure of the reflecting portions 21 to 24 at the lower end is shown. The luminance at the upper end indicates that the darker the color, the higher the luminance, and the lighter the color, the lower the luminance.

[0188] Referring to Figure 20 It can be seen that each of the reflecting portions 21 to 24 is formed in a circular shape, and the luminance of the space between the reflecting portions 21 to 24 is low. This means that in the case where the reflecting portions 21 to 24 are circular, the luminance of the central portion of the reflecting portions 21 to 24 is high, but the luminance of the peripheral portion of the reflecting portions 21 to 24 and the space between the reflecting portions 21 to 24 is low, that is, it means that the luminance difference between the central portion of the reflecting portions 21 to 24 and other regions is large, and the overall optical uniformity is not high.

[0189] In Figure 21 , the reflecting portion 20 is provided in an inverted triangular shape, and it can be seen that the luminance of the space between the reflecting portions 21 to 24 is higher than in Figure 20the brightness of the space between the reflection sections 21 to 24 is low, and thus it can be seen that the optical uniformity is uneven.

[0190] Figure 21 The reflection sections 21 to 24 are in the shape of a square, which is an asymmetric shape as defined above, and it can be seen that, in comparison with the circular point-symmetrical shape of Figure 20 this asymmetric shape improves the overall optical uniformity.

[0191] Figure 22 The reflection sections 21 to 24 are in the shape of a square, which is an asymmetric shape as defined above, and it can be seen that, in comparison with the circular point-symmetrical shape of Figure 20 this asymmetric shape improves the overall optical uniformity.

[0192] Figure 23 The reflection sections 21 to 24 are in the shape of a square, which is an asymmetric shape as defined above, and it can be seen that, in comparison with the circular point-symmetrical shape of Figure 22 this asymmetric shape improves the overall optical uniformity.

[0193] Figure 23 The reflection sections 21 to 24 are in the shape of a square, which is an asymmetric shape as defined above, and it can be seen that, in comparison with the circular point-symmetrical shape of Figure 22 this asymmetric shape improves the overall optical uniformity.

[0194] Thus, in the case where a plurality of reflection sections 21 to 24 are provided, when the reflection sections 21 to 24 are formed in an asymmetric shape rather than a point-symmetrical shape, the overall optical uniformity is improved in comparison with the case of the point-symmetrical shape.

[0195] Figure 24 The center of the circular reflection section 21 to 24 in the shape of a donut with a through-hole formed in the center portion is provided in a triangular shape similar to that shown in Figure 2 it can be seen that the brightness is distributed evenly. However, in the case of Figure 24 the brightness of the center portion is not as high as in other cases.

[0196] In the reflection sections 21 to 24 of the embodiment of Figure 24 since the image light that has entered through the through-hole formed in the center portion is not reflected, the brightness of the center portion can be adjusted to be low.

[0197] That is, according to the embodiment of Figure 24 it can be seen that, in the case of the point-symmetrical shape, the optical uniformity can be improved by forming a through-hole in the center portion.

[0198] Referring to Figures 20 to 24 it can be seen that, depending on the shape and the arrangement structure, the distribution of the brightness differs from one another.

[0199] In the case where the overall optical uniformity is prioritized, it is preferable to adopt a shape as shown inFigure 24 In a configuration structure where it is desirable to increase the brightness of the center portion of reflective parts 21-24 even if optical uniformity is not uniform, it is preferable to use a configuration that... Figures 20 to 22 Use an appropriate one in the configuration structure.

[0200] The embodiments of the present invention have been described above. The embodiments of the present invention are not limited thereto, and many other modifications and changes can be made within the scope of the present invention based on the claims and drawings.

[0201] For example, the embodiments described can be used independently, or they can be used in combination with each other.

[0202] For example, Figures 1 to 8 The embodiments can be used in combination with each other.

[0203] On the other hand, in the embodiment described above, the image light emitted from the image emission section 30 and the image light emitted from the reflection sections 21 to 24 toward the pupil 40 are displayed as horizontal light in a straight line. However, this is only shown as an example for the sake of illustration. In reality, the image light, such as ordinary light radiation, can be emitted uniformly in all directions.

[0204] Additionally, in the Figures 2 to 8 In the embodiments described, although any direction (the first direction) is described as the vertical direction, this is an example assuming that the image emission section 30 is located on the side, and the invention can be used even if the image emission section 30 is set in other positions by appropriately rotating the optical unit 10 with regard to the position of the image emission section 30.

Claims

1. An optical device for augmented reality, characterized by, including: an optical unit for transmitting at least a part of visible light, a first reflection portion group composed of at least one reflection portion, the at least one reflection portion of the first reflection portion group being arranged in a row along a first direction as an arbitrary straight line direction on a surface or inside of the optical unit, and a second reflection portion group composed of at least one reflection portion, the at least one reflection portion of the second reflection portion group being arranged in a row along the first direction and being arranged in parallel with the reflection portions of the first reflection portion group at intervals along a second direction perpendicular to the first direction; the reflection portions have a size of 8 mm or less, the reflection portions reflect image light emitted from an image exit portion for emitting image light corresponding to an augmented reality image toward a pupil of a user's eye, horizontal lines passing through the centers of the reflection portions of the second reflection portion group and parallel to the second direction and horizontal lines passing through the centers of the reflection portions of the first reflection portion group and parallel to the second direction are arranged in parallel at intervals from each other in order, and the centers of the reflection portions constituting the first reflection portion group and the second reflection portion group are not arranged side by side along the second direction but are staggered from each other.

2. An optical device for augmented reality, characterized in that, including: an optical unit for transmitting at least a part of visible light, and n reflection portion groups composed of at least one reflection portion, the at least one reflection portion being arranged in a row along a first direction as an arbitrary straight line direction on a surface or inside of the optical unit, n being a natural number of 2 or more; the n reflection portion groups are arranged in parallel at intervals along a second direction perpendicular to the first direction on the surface or inside of the optical unit, the reflection portions constituting the n reflection portion groups respectively reflect image light emitted from an image exit portion for emitting image light corresponding to an augmented reality image toward a pupil of a user's eye, the reflection portions constituting a kth reflection portion group among the n reflection portion groups are protrusively arranged so that a height of the reflection portions of the kth reflection portion group from a plane p constituted by the first direction and the second direction of the first reflection portion group to a direction perpendicular to the first direction and the second direction is higher than a height of reflection portions of a (k-1)th reflection portion group from the plane p to the direction perpendicular to the first direction and the second direction, k being a natural number in a range of 2 ≤ k ≤ n.

3. An optical device for augmented reality, characterized in that, including: an optical unit for transmitting at least a part of visible light, a first reflection portion group composed of at least one reflection portion, the at least one reflection portion of the first reflection portion group being arranged in a row along a first direction as an arbitrary straight line direction on a surface or inside of the optical unit, and a second reflection portion group composed of at least one reflection portion, the at least one reflection portion of the second reflection portion group being arranged in a row along the first direction and being arranged in parallel with the reflection portions of the first reflection portion group at intervals along a second direction perpendicular to the first direction; the reflection portions have a size of 8 mm or less, the reflection portions reflect image light emitted from an image exit portion for emitting image light corresponding to an augmented reality image toward a pupil of a user's eye, horizontal lines passing through the centers of the reflection portions of the second reflection portion group and parallel to the second direction and horizontal lines passing through the centers of the reflection portions of the first reflection portion group and parallel to the second direction are arranged in parallel at intervals from each other in order, and the centers of the reflection portions constituting the first reflection portion group and the second reflection portion group are not arranged side by side along the second direction but are staggered from each other. The reflection sections reflect the image light emitted from the image exit section for emitting image light corresponding to an augmented reality image toward a pupil of a user's eye. The reflection sections of the first reflection section group and the second reflection section group arranged side by side in the second direction are configured to overlap only a part of the area when viewed in the second direction.

4. An optical device for augmented reality, characterized in that, Comprise: an optical unit for transmitting at least a part of visible light, a first reflection section group composed of at least one reflection section, the at least one reflection section of the first reflection section group being arranged in a row in a first direction as any straight line direction on a surface or inside the optical unit, and a second reflection section group composed of at least one reflection section, the at least one reflection section of the second reflection section group being arranged in a row in the first direction and being arranged in parallel with the reflection sections of the first reflection section group at an interval apart from the reflection sections of the first reflection section group in a second direction perpendicular to the first direction; a through hole through which incident light can pass is formed inside the reflection sections of the first reflection section group, whereby a part of the image light emitted from the image exit section for emitting image light corresponding to an augmented reality image is transmitted to the reflection sections of the second reflection section group through the through hole, and a part of the image light emitted from the image exit section is reflected toward a pupil of a user's eye through a part other than the through hole, the reflection sections of the second reflection section group reflect the image light incident through the through hole of the reflection sections of the first reflection section group toward a pupil of a user's eye.

5. The optical device for augmented reality according to any one of claims 1 to 4, wherein a plurality of the reflection sections are arranged at a distance of 8 mm or less from adjacent reflection sections.

6. The optical device for augmented reality according to claim 5, wherein the distance between adjacent reflection sections is the minimum value between points on the boundary line of the orthographic projection of a reflection section onto a plane passing through the pupil and perpendicular to the front direction when the user gazes at the front.

7. The optical device for augmented reality according to any one of claims 2 to 4, wherein the size of each of a plurality of the reflection sections is 8 mm or less.

8. The optical device for augmented reality according to claim 7, wherein the size of each of a plurality of the reflection sections is the maximum length between any two points on the boundary line of a reflection section.

9. The optical device for augmented reality according to any one of claims 1 to 4, wherein the size of each of a plurality of the reflection sections is the maximum length between any two points on the boundary line of the orthographic projection of a reflection section onto a plane passing through the pupil and perpendicular to the front direction when the user gazes at the front.

10. The optical device for augmented reality according to any one of claims 1 to 4, wherein Each of the plurality of the reflection portions is formed to have an area of 16πmm 2 The following values.

11. The optical device for augmented reality according to claim 10, wherein An area of each of the plurality of the reflection portions is an area of a positive projection of the reflection portion onto a plane passing through the pupil and perpendicular to the direction of the front face when the user gazes at the front face.

12. The optical device for augmented reality according to any one of claims 1 to 4, wherein A shape of each of the plurality of the reflection portions is formed as an asymmetric shape exhibiting a shape other than a point-symmetrical shape, The point-symmetrical shape refers to a shape in which, when the reflection portion is rotated around a specific point of a plane of the reflection portion, there is a specific point that always has the same shape for all rotation angles, and the asymmetric shape refers to a shape that is not the point-symmetrical shape, i.e., a shape in which, when the reflection portion is rotated around a specific point of a plane of the reflection portion, there is no specific point that always has the same shape for all rotation angles.

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