Optical device

Abstract

An optical device is disclosed. The optical device includes a first lens, a first display device, and a first active mirror, wherein the first lens has a first surface and a plurality of side surfaces, the first display device is arranged on a first side surface of the side surfaces of the first lens, and the first active mirror is arranged in the first lens. The first active mirror is tilted at a first angle during a first period and tilted at a second angle during a second period.

Description

Technical Field

[0001] Exemplary embodiments of the present invention generally relate to optical devices and methods for driving optical devices. Background Art

[0002] Augmented reality is an emerging technology that provides users with real-world images by adding a layer of virtual images to the real-world images. The virtual images may be in the form of text or graphics, while the real-world images may be information of real objects captured by the device.

[0003] The optical device may include a display device for displaying a virtual image, and an optical member for providing the virtual image to the user's eyes. The optical device may be implemented in the form of a pair of glasses so that the user can easily carry it and can easily put on or take off the device.

[0004] In order to provide a more realistic augmented reality, it is desirable to increase the size or number of virtual images observed by the user. In order to increase the size or number of virtual images, it is necessary to expand the area of ​​the display device observed by the user's eyes, that is, the user's field of view (FOV).

[0005] The above information disclosed in this Background section is only for understanding the background of the inventive concept and therefore it may contain information that does not constitute the prior art. Summary of the invention

[0006] Exemplary embodiments of the present invention provide an optical device that can expand a portion of a display device observed by eyes of a user, that is, a field of view (FOV) of the user.

[0007] Exemplary embodiments of the present invention also provide a method of driving an optical device of a portion of an expandable display device observed by eyes of a user, ie, a field of view (FOV) of the user.

[0008] Additional features of the inventive concept will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the inventive concept.

[0009] An exemplary embodiment of the present invention provides an optical device, the optical device including a first lens, a first display device, and a first active mirror, wherein the first lens has a first surface and a plurality of side surfaces, the first display device is arranged on a first side surface of the side surfaces of the first lens, and the first active mirror is arranged in the first lens. The first active mirror is tilted at a first angle during a first period and tilted at a second angle during a second period.

[0010] Each of the first angle and the second angle may be measured from a thickness direction of the first lens toward a height direction of the first lens.

[0011] The first lens may include a first lens portion and a second lens portion, wherein the second lens portion has a groove formed in a side surface thereof facing a side surface of the first lens portion, wherein the first active mirror may be accommodated in the groove.

[0012] The groove may be filled with a fluid.

[0013] The optical device may further include a first electrode, a second electrode, and a mirror support, wherein the first electrode and the second electrode are arranged on a bottom of the groove, and the mirror support is arranged on the bottom of the groove to support the first active mirror.

[0014] The bottom of the groove is inclined at a third angle, wherein the third angle can be measured from a thickness direction of the first lens toward a height direction of the first lens.

[0015] The first electrode, the second electrode and the mirror support may be made of a transparent conductive material.

[0016] During a first period, a first driving voltage may be applied to the first electrode and a second driving voltage may be applied to the second electrode and the first active mirror so that the first active mirror tilts toward the first electrode.

[0017] During the second period, the first driving voltage may be applied to the second electrode and the second driving voltage may be applied to the first electrode and the first active mirror so that the first active mirror tilts toward the second electrode.

[0018] The first display device may display a first image during a first period, and display a second image during a second period.

[0019] The first active mirror may reflect an image displayed on a first area of ​​the first display device toward the first surface during a first period, and may reflect an image displayed on a second area of ​​the first display device toward the first surface during a second period.

[0020] The first active mirror may reflect an image displayed on a third area of ​​the first display device toward the first surface during a third period, and may reflect an image displayed on a fourth area of ​​the first display device toward the first surface during a fourth period.

[0021] The first lens may include a first lens portion and a second lens portion, wherein the second lens portion has a groove formed in a side surface thereof facing a side surface of the first lens portion, wherein the first active mirror may be accommodated in the groove.

[0022] The optical device may further include a first electrode, a second electrode, a third electrode, a fourth electrode and a mirror support, wherein the first electrode, the second electrode, the third electrode and the fourth electrode are arranged on the bottom of the groove, and the mirror support is arranged on the bottom of the groove to support the first active mirror.

[0023] During a first period, a first driving voltage may be applied to the first electrode and a second driving voltage may be applied to the second electrode, the third electrode, the fourth electrode, and the first active mirror so that the first active mirror tilts toward the first electrode.

[0024] During the second period, the first driving voltage may be applied to the second electrode and the second driving voltage may be applied to the first electrode, the third electrode, the fourth electrode, and the first active mirror so that the first active mirror tilts toward the second electrode.

[0025] During a third period, a first driving voltage may be applied to the third electrode and a second driving voltage may be applied to the first electrode, the second electrode, the fourth electrode, and the first active mirror so that the first active mirror tilts toward the third electrode.

[0026] During a fourth period, a first driving voltage may be applied to the fourth electrode and a second driving voltage may be applied to the first electrode, the second electrode, the third electrode, and the first active mirror so that the first active mirror tilts toward the fourth electrode.

[0027] Another exemplary embodiment of the present invention provides an optical device, the optical device including a first lens, a first display device, a second display device, and a first active mirror, wherein the first lens has a first surface and a plurality of side surfaces, the first display device is arranged on a first side surface of the side surfaces of the first lens, the second display device is arranged on a second side surface of the side surfaces of the first lens, and the first active mirror is arranged in the first lens. The first active mirror is configured to reflect a first image displayed by the first display device toward the first surface during a first period, and reflect a second image displayed by the second display device toward the first surface during a second period.

[0028] The first side surface and the second side surface of the first lens may face each other.

[0029] The first active mirror may be tilted at a first angle during a first period and tilted at a second angle during a second period, and each of the first angle and the second angle may be measured from a height direction of the first lens toward a thickness direction of the first lens.

[0030] The first active mirror may be tilted at a first angle during a first period and may be tilted at a second angle during a second period, and each of the first angle and the second angle may be measured from a width direction of the first lens toward a height direction of the first lens.

[0031] The optical device may further include a third display device and a fourth display device, wherein the third display device is arranged on a third side surface among the plurality of side surfaces of the first lens, and the fourth display device is arranged on a fourth side surface among the plurality of side surfaces of the first lens.

[0032] The first active mirror may reflect a third image displayed by the third display device toward the first surface during a third period, and may reflect a fourth image displayed by the fourth display device toward the first surface during a fourth period.

[0033] The third side surface and the fourth side surface of the first lens may face each other.

[0034] Another exemplary embodiment of the present invention provides a driving method of an optical device, the method comprising the steps of: displaying a first image on a first display device during a first period; applying a first driving voltage to a first electrode and applying a second driving voltage to a second electrode and a first active mirror during the first period so that the first active mirror is tilted at a first angle; displaying a second image on the first display device during a second period; and applying the first driving voltage to the second electrode and applying the second driving voltage to the first electrode and the first active mirror during the second period so that the first active mirror is tilted at a second angle.

[0035] Another exemplary embodiment of the present invention provides a driving method of an optical device, the method comprising the following steps: displaying a first image on a first display device arranged on a first side surface of a first lens during a first period; reflecting the first image on the first display device by a first active mirror during the first period so that the first image is emitted through the first surface; displaying a second image on a second display device arranged on a second side surface of the first lens during a second period; and reflecting the second image of the second display device by the first active mirror during the second period so that the second image is emitted through the first surface of the first lens.

[0036] Another exemplary embodiment of the present invention provides a driving method of an optical device, the method comprising the following steps: displaying a third image on a third display device arranged on a third side surface of a first lens during a third period; reflecting the third image on the third display device by a first active mirror during the third period so that the third image is emitted through the first surface; displaying a fourth image on a fourth display device arranged on a fourth side surface of the first lens during a fourth period; and reflecting the fourth image on the fourth display device by the first active mirror during the fourth period so that the fourth image is emitted through the first surface of the first lens.

[0037] Another exemplary embodiment of the present invention provides a driving method of an optical device, the method comprising the following steps: during a first period, reflecting by a first active mirror a first image displayed in a first area of ​​a first display device arranged on a first side surface of a first lens so that the first image is emitted through the first surface; during a second period, reflecting by the first active mirror a second image displayed in a second area of ​​the first display device so that the second image is emitted through the first surface of the first lens; during a third period, reflecting by the first active mirror a third image displayed in a third area of ​​the first display device so that the third image is emitted through the first surface of the first lens; and during a fourth period, reflecting by the first active mirror a fourth image displayed in a fourth area of ​​the first display device so that the fourth image is emitted through the first surface of the first lens.

[0038] According to the foregoing and other exemplary embodiments of the present invention, a display device is arranged on one of the side surfaces of a lens, and an active mirror is tilted at a first angle during a first period so that an image on the display device can be provided to the user's eyes, and the active mirror is tilted at a second angle during a second period so that an image on the display device can be provided to the user's eyes. Thus, the user can observe the first image displayed on the display device as a virtual image during the first period, and observe the second image displayed on the display device as a virtual image during the second period. Therefore, the portion of the display device observed by the user (i.e., the user's field of view (FOV)) can be expanded without increasing the number of mirrors or even increasing the area of ​​the display device.

[0039] According to the foregoing and other exemplary embodiments of the present invention, the active mirror is tilted at a first angle during a first period so that an image on a display device arranged on one side surface of the lens can be provided to the user's eyes, and the active mirror is tilted at a second angle during a second period so that an image from a display device arranged on another side surface of the lens can be provided to the user's eyes. That is, the user can observe a first image displayed on a display device arranged on one side surface of the lens as a virtual image during the first period, and observe a second image displayed on a display device arranged on another side surface of the lens as a virtual image during the second period. Therefore, the portion of the display device observed by the user (i.e., the user's field of view (FOV)) can be expanded without increasing the number of mirrors.

[0040] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the inventive concept.

[0042] Figure 1 is a perspective view showing an optical device according to an exemplary embodiment of the present invention.

[0043] Figure 2 is an exploded perspective view showing an optical device according to an exemplary embodiment of the present invention.

[0044] Figure 3 It is shown Figure 2 A perspective view of an example of a first lens and a first display device.

[0045] Figure 4 It is shown in detail Figure 3 A cross-sectional view of a first display device.

[0046] Figure 5A , Figure 5B , Figure 5C and Figure 5D It is shown Figure 3 An exploded perspective view of an example of a first lens.

[0047] Figure 6 The layout is shown in detail Figure 5A Cross-sectional view of an example of a first electrode, a second electrode, a mirror support and a first active mirror in a groove of.

[0048] Fig. 7A and Figure 7B is a view showing how the tilt angle of the first active mirror changes according to a driving voltage applied to the first electrode, the second electrode, and the first active mirror.

[0049] Figure 8 is a flowchart illustrating a method for providing augmented reality by an optical device according to an exemplary embodiment of the present invention.

[0050] Fig. 9A and Fig. 9B is a view illustrating an example of a method of providing augmented reality by an optical device according to an exemplary embodiment of the present invention.

[0051] Fig.10 is an exploded perspective view showing an optical device according to an exemplary embodiment of the present invention.

[0052] Fig.11 It is shown Fig.10 A perspective view of an example of a first lens, a first display device, and a third display device.

[0053] Fig.12 It is shown Fig.11 An exploded perspective view of an example of a first lens.

[0054] Fig.13 is a flowchart illustrating a method for providing augmented reality by an optical device according to an exemplary embodiment of the present invention.

[0055] Fig.14A and Fig. 14B 2 is a view showing an example of a method for providing augmented reality by an optical device according to an exemplary embodiment of the present invention.

[0056] Fig.15 is an exploded perspective view showing an optical device according to an exemplary embodiment of the present invention.

[0057] Fig.16 It is shown Fig.15 A perspective view of an example of a first lens, a first display device, and a third display device.

[0058] Fig.17 It is shown Fig.16 An exploded perspective view of an example of a first lens.

[0059] Fig.18A and Fig.18B 2 is a view showing an example of a method for providing augmented reality by an optical device according to an exemplary embodiment of the present invention.

[0060] Fig.19 It is shown Figure 2 A perspective view of an example of a first lens and a first display device.

[0061] Fig. 20 It is shown Fig.19 An exploded perspective view of an example of a first lens.

[0062] Fig.21 is a flowchart illustrating a method for providing augmented reality by an optical device according to an exemplary embodiment of the present invention.

[0063] Fig.22A , Fig. 22B , Fig. 22C and Fig.22D 2 is a view showing an example of a method for providing augmented reality by an optical device according to an exemplary embodiment of the present invention.

[0064] Fig.23 is an exploded perspective view showing an optical device according to an exemplary embodiment of the present invention.

[0065] Fig.24 It is shown Fig.23A perspective view of an example of a first lens, a first display device, a third display device, a fifth display device, and a seventh display device.

[0066] Fig.25 It is shown Fig.23 An exploded perspective view of an example of a first lens.

[0067] Fig.26 is a flowchart illustrating a method for providing augmented reality by an optical device according to an exemplary embodiment of the present invention.

[0068] Fig.27A , Fig.27B , Fig.27C and Fig.27D 2 is a view showing an example of a method for providing augmented reality by an optical device according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0069] In the following description, for the purpose of explanation, many specific details are set forth to provide a thorough understanding of various exemplary embodiments of the present invention. As used herein, "embodiment" is a non-limiting example of a device or method using one or more of the inventive concepts disclosed herein. However, it is apparent that various exemplary embodiments can be practiced without specific details or with one or more equivalent arrangements. In other examples, known structures and devices are shown in block diagram form to avoid unnecessary confusion of various exemplary embodiments. In addition, various exemplary embodiments may be different, but need not be exclusive. For example, without departing from the inventive concept, the specific shape, configuration and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0070] Unless otherwise specified, the exemplary embodiments shown should be understood as providing exemplary features of different details of some ways in which the inventive concept can be implemented in practice. Therefore, unless otherwise specified, the features, components, modules, layers, films, panels, regions and / or aspects, etc. (hereinafter individually or collectively referred to as "elements") of various embodiments may be combined, separated, interchanged and / or rearranged in other ways without departing from the inventive concept.

[0071] The use of cross hatching and / or shading in the drawings is generally provided to clarify the boundaries between adjacent elements. Thus, unless otherwise stated, the presence or absence of cross hatching or shading will not convey or indicate any preference or requirement for a particular material, material properties, size, ratio, commonality between the elements shown and / or any other characteristics, attributes, performances, etc. of the elements. In addition, in the drawings, the size and relative size of the elements may be exaggerated for the purpose of clarity and / or description. When the exemplary embodiments can be implemented in different ways, the specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially simultaneously or in an order opposite to the described order. In addition, similar reference numerals represent similar elements.

[0072] When an element (e.g., layer) is referred to as being "on", "connected to" or "coupled to" another element or layer, the element (e.g., layer) may be directly on, connected to or coupled to another element or layer, or there may be an intermediate element or layer. However, when an element or layer is referred to as being "directly" "on", "directly connected to" or "directly coupled to" another element or layer, there are no intermediate elements or layers. For this reason, the term "connected" may indicate a physical, electrical and / or fluid connection with or without an intermediate element. In addition, the D1-axis, D2-axis and D3-axis are not limited to the three axes of a rectangular coordinate system (such as an x-axis, a y-axis and a z-axis), and may be interpreted as a broader meaning. For example, the D1-axis, the D2-axis and the D3-axis may be perpendicular to each other, or may represent different directions that are not perpendicular to each other. For the purpose of this disclosure, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" may be interpreted as any combination of only X, only Y, only Z, or two or more of X, Y, and Z, such as XYZ, XYY, YZ, and ZZ. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0073] Although the terms "first", "second", etc. may be used herein to describe various types of elements, these components should not be limited by these terms. These terms are used to distinguish one element from another element. Therefore, without departing from the teachings of the present disclosure, the first element discussed below may be referred to as the second element.

[0074] Spatially relative terms such as "beneath," "below," "lower," "above," "upper," "over," "higher," "side" (e.g., as in "sidewall"), etc. may be used herein for descriptive purposes, and thus, to describe the relationship of one element to another element as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as being "below" or "beneath" other elements or features would subsequently be oriented to be "above" the other elements or features. Thus, the exemplary term "below" may include both orientations of above and below. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and thus, the spatially relative descriptors used herein are interpreted accordingly.

[0075] The terms used herein are for the purpose of describing specific embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" as used herein are also intended to include the plural forms. In addition, when the words "comprise", "comprising", "include" and / or "including" are used in this specification, the existence of the stated features, integers, steps, operations, elements, parts and / or clusters thereof is indicated, but the existence or addition of one or more other features, integers, steps, operations, elements, parts and / or clusters thereof is not excluded. It is also noted that, as used herein, the words "substantially", "about" and similar words are used as approximate words rather than words of degree, and thus, are used to take into account the inherent deviations of measured values, calculated values ​​and / or provided values ​​that will be recognized by those of ordinary skill in the art.

[0076] Various exemplary embodiments are described herein with reference to cross-sectional views and / or exploded views that are schematic illustrations of idealized exemplary embodiments and / or intermediate structures. Thus, variations in the shapes of the illustrations as a result of, for example, manufacturing techniques and / or tolerances are to be expected. Therefore, the exemplary embodiments disclosed herein should not necessarily be construed as limited to the specific illustrated shapes of the regions, but rather include deviations in shape resulting from, for example, manufacturing. In this manner, the regions illustrated in the figures may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of the regions of the device, and thus are not necessarily intended to be limiting.

[0077] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present disclosure belongs. Unless explicitly defined as such herein, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and should not be interpreted in an idealized or overly formal sense.

[0078] Figure 1 is a perspective view showing an optical device according to an exemplary embodiment of the present invention. Figure 2 is an exploded perspective view showing an optical device according to an exemplary embodiment of the present invention. Figure 3 It is shown Figure 2 A perspective view of an example of a first lens and a first display device. Figure 4 It is shown in detail Figure 3 A cross-sectional view of a first display device.

[0079] Reference Figures 1 to 4 , an optical device 1 according to an exemplary embodiment of the present invention includes a top bar 20, a first lens frame 21, a second lens frame 22, a first temple 31, a second temple 32, a first lens 110, a second lens 120, a first display device 210, a second display device 220, a first active mirror 410, and a second active mirror 420. The optical device 1 may be a device for realizing augmented reality or displaying a virtual image.

[0080] As used herein, the terms "above", "top" and "upper surface" refer to the side indicated by the arrow in the z-axis direction, and the terms "below", "bottom" and "lower surface" refer to the opposite side in the z-axis direction. In addition, "left side" refers to the opposite direction indicated by the arrow of the x-axis, "right side" refers to the direction indicated by the arrow of the x-axis, "upper side" refers to the direction indicated by the arrow of the y-axis, and "lower side" refers to the opposite direction indicated by the arrow of the y-axis.

[0081] The top bar 20 is used to support the first lens 110 and the second lens 120 together with the first lens frame 21 and the second lens frame 22. The first lens 110 may be surrounded by the top bar 20 and the first lens frame 21. The second lens 120 may be surrounded by the top bar 20 and the second lens frame 22.

[0082] The lift bar 20 may be disposed on an upper side of the first lens 110 and on an upper side of the second lens 120. The lift bar 20 may be elongated in a first direction (x-axis direction).

[0083] The first lens frame 21 may be arranged on the left, lower, and right sides of the first lens 110. The first lens frame 21 may be coupled to the top bar 20. The second lens frame 22 may be arranged on the left, lower, and right sides of the second lens 120. The second lens frame 22 may be coupled to the top bar 20. Each of the first lens frame 21 and the second lens frame 22 may include a nose pad.

[0084] Despite Figure 2 In the example shown in FIG. 2 , the top bar 20 , the first lens frame 21 , and the second lens frame 22 are separately formed and coupled to each other, but this is merely exemplary. The top bar 20 , the first lens frame 21 , and the second lens frame 22 may be formed as a single piece.

[0085] The first temple 31 may be fixed to the left end of the lower side of the top bar 20. The second temple 32 may be fixed to the right end of the lower side of the top bar 20. Each of the first temple 31 and the second temple 32 may be fixed to the top bar 20 by a fixing member such as a screw.

[0086] Each of the top bar 20, the first lens frame 21, the second lens frame 22, the first temple 31 and the second temple 32 may be made of plastic, metal or a combination of plastic and metal. The first lens frame 21 and the second lens frame 22 may be omitted.

[0087] Each of the first lens 110 and the second lens 120 may be formed of glass or plastic to be transparent or translucent. Accordingly, the user may observe a real-world image through the first lens 110 and the second lens 120. The first lens 110 and the second lens 120 may have refractive power in consideration of the user's vision.

[0088] Each of the first lens 110 and the second lens 120 may have a hexahedral shape including a quadrilateral top, a quadrilateral bottom, and a quadrilateral first to fourth side surfaces. The top surface of the first lens 110 may be positioned toward the right eye RE of the user. The light from the first display device 210 is reflected by the first active mirror 410 and may be emitted through the top surface. The bottom surface of the first lens 110 may be located on the outer side of the first lens 110. The top surface of the second lens 120 may be positioned toward the left eye LE of the user. The light from the second display device 220 is reflected by the second active mirror 420 and may be emitted through the top surface. The bottom surface of the second lens 120 may be located on the outer side of the second lens 120.

[0089] Each of the first lens 110 and the second lens 120 is not limited to Figure 1 and Figure 2As shown in , and may be formed into a polyhedron having a first face, a second face, and a side face in a polygonal shape. In addition, each of the first lens 110 and the second lens 120 may be formed into other shapes other than a polyhedron shape, such as a cylindrical shape, an elliptical cylindrical shape, a semi-cylindrical shape, a semi-elliptical cylindrical shape, a distorted cylindrical shape, and a distorted semi-cylindrical shape. The distorted cylindrical and semi-cylindrical shapes refer to cylindrical and semi-cylindrical shapes with irregular diameters.

[0090] The first active mirror 410 is disposed in the first lens 110. The second active mirror 420 is disposed in the second lens 120. Each of the first active mirror 410 and the second active mirror 420 may be a small mirror such as a pin mirror. Figure 1 and Figure 2 In the example shown in FIG. 4 , the first active mirror 410 and the second active mirror 420 each have a circular cross section, but this is merely exemplary. The first active mirror 410 and the second active mirror 420 may alternatively have an elliptical or polygonal cross section.

[0091] The first active mirror 410 may reflect the first image displayed on the first display device 210 to provide the reflected first image to the user's right eye RE. The second active mirror 420 may reflect the second image displayed on the second display device 220 to provide the reflected second image to the user's left eye LE.

[0092] The first active mirror 410 and the second active mirror 420 may be formed to be smaller than the size of the pupil of the right eye RE and the left eye LE, respectively. For example, the diameter of the first active mirror 410 and the diameter of the second active mirror 420 may be in the range of 500 μm to 4 mm. In this case, since the user focuses on the real-world image, the user is unlikely to recognize the first active mirror 410 and the second active mirror 420. However, if the size of the first active mirror 410 and the second active mirror 420 becomes smaller, the brightness of the first image of the first display device 210 provided to the user's right eye RE and the brightness of the second image of the second display device 220 provided to the user's left eye LE may be reduced. Therefore, the size of the first active mirror 410 and the size of the second active mirror 420 may be determined so that these mirrors are not recognized without reducing the brightness.

[0093] like Figure 1 and Figure 2 As shown in , each of the first active mirror 410 and the second active mirror 420 may have a cylindrical shape. Each of the first active mirror 410 and the second active mirror 420 may include two bottom surfaces. One of the two bottom surfaces may be reflective, while the other of the two bottom surfaces and the side surfaces may not be reflective.

[0094] Each of the first active mirror 410 and the second active mirror 420 may be arranged to overlap the first electrode and the second electrode. The tilt angle may be adjusted according to the driving voltage applied to the first active mirror 410, the second active mirror 420, the first electrode, and the second electrode. For example, the first active mirror 410 may be tilted at a first angle during a first period and tilted at a second angle during a second period. Thus, the first display device 210 may display a first image during the first period, and the second display device 220 may display a second image during the second period. Accordingly, the first image displayed by the first display device 210 during the first period may be focused on the retina of the user's right eye RE. Fig. 9A and Fig. 9B As shown in , object A is focused on the retina of the user's right eye RE, and the first image B displayed by the first display device 210 can be focused on the retina of the user's right eye RE. Accordingly, even if the first image B is not focused, the user can clearly see the object A and the first image B with her / his right eye RE.

[0095] In addition, the second image displayed by the second display device 220 during the second period may be focused on the retina of the user's left eye LE. Fig. 9A and Fig. 9B Similarly, the object is focused on the retina of the user's left eye LE, and the second image displayed by the second display device 220 can be focused on the retina of the user's left eye LE. Accordingly, even if the second image is not focused, the user can clearly see the object and the second image with her / his left eye LE.

[0096] Each of the first active mirror 410 and the second active mirror 420 may be implemented as an electrostatic mirror, a micromirror, or a piezoelectric mirror used in a digital micromirror device (DMD). In the following description, for convenience of explanation, each of the first active mirror 410 and the second active mirror 420 is implemented as Figure 6 , Fig. 7A and Figure 7B The electrostatic mirror shown in .

[0097] Each of the first display device 210 and the second display device 220 displays a virtual image for implementing augmented reality. The first display device 210 may display a first image as a virtual image, and the second display device 220 may display a second image as a virtual image.

[0098] The first display device 210 may include a first display panel 2101 , a first circuit board 2102 , and a first driving circuit 2103 . The second display device 220 may include a second display panel 2201 , a second circuit board 2202 , and a second driving circuit 2203 .

[0099] The first display panel 2101 may be disposed on one of the side surfaces of the first lens 110. The second display panel 2201 may be disposed on one of the side surfaces of the second lens 120. The first display panel 2101 and the second display panel 2201 may be covered by the top bar 20, the first lens frame 21, and / or the second lens frame 22.

[0100] For example, Figure 2 and Figure 3 As shown in , the first display panel 2101 may be arranged on the upper side of the first lens 110, and the second display panel 2201 may be arranged on the upper side of the second lens 120. Since the first display panel 2101 and the second display panel 2201 may be covered by the top bar 20, the first lens frame 21 and the second lens frame 22 may be omitted according to design selection.

[0101] However, it should be understood that the position of the first display panel 2101 and the position of the second display panel 2201 are not limited to Figure 2 and Figure 3 . The first display panel 2101 may be arranged on any one of the side surfaces of the first lens 110, as long as the first image can be reflected by the first active mirror 410 toward the exit surface of the first lens 110. The exit surface of the first lens 110 refers to the first surface of the first lens 110 opposite to the right eye RE of the user. The second display panel 2201 may be arranged on any one of the side surfaces of the second lens 120, as long as the second image can be reflected by the second active mirror 420 toward the exit surface of the second lens 120. The exit surface of the second lens 120 refers to the first surface of the second lens 120 opposite to the left eye LE of the user.

[0102] Each of the first display panel 2101 and the second display panel 2201 may be a flexible display panel that can be bent, rolled or curved. For example, each of the first display panel 2101 and the second display panel 2201 may be an organic light emitting display panel or an organic light emitting display panel including quantum dots. In the following description, Figure 4 As shown in FIG. 1 , the first display panel 2101 and the second display panel 2201 are implemented as organic light emitting display panels.

[0103] like Figure 4 As shown in , the first display panel 2101 may include a substrate 1100 , a thin film transistor layer 1230 , a light emitting element layer 1240 , and a thin film encapsulation layer 1300 .

[0104] The thin film transistor layer 1230 is formed on the substrate 1100 , and includes a thin film transistor 1235 , a gate insulating layer 1236 , an interlayer dielectric layer 1237 , a protective layer 1238 , and a planarization layer 1239 .

[0105] A buffer layer may be formed on the substrate 1100. The buffer layer may be formed on the substrate 1100 to protect the thin film transistor 1235 and the light emitting element from moisture that penetrates through the substrate 1100, which is susceptible to moisture penetration. The buffer layer may be formed of a plurality of inorganic layers alternately stacked with each other. For example, the buffer layer may be made of a plurality of layers, and in the plurality of layers, a silicon oxide layer (SiO x ), silicon nitride layer (SiN x ) and one or more inorganic layers of the SiON layer are alternately stacked on top of each other. The buffer layer may be omitted.

[0106] The thin film transistors 1235 are disposed on the buffer layer. Each of the thin film transistors 1235 includes an active layer 1231, a gate electrode 1232, a source electrode 1233, and a drain electrode 1234. Figure 4 In the embodiment, each of the thin film transistors 1235 is implemented as a top gate transistor in which the gate electrode 1232 is located above the active layer 1231. However, it should be understood that the inventive concept is not limited thereto. That is, each of the thin film transistors 1235 can be implemented as a bottom gate transistor in which the gate electrode 1232 is located below the active layer 1231, or as a dual gate transistor in which the gate electrode 1232 is arranged above and below the active layer 1231.

[0107] The active layer 1231 is formed on the buffer layer. The active layer 1231 may be formed of a silicon-based semiconductor material or an oxide-based semiconductor material. A light blocking layer for blocking external light incident on the active layer 1231 may be formed between the buffer layer and the active layer 1231 .

[0108] The gate insulating layer 1236 may be formed on the active layer 1231. The gate insulating layer 1236 may be formed of an inorganic layer (eg, a silicon oxide layer (SiO x ), silicon nitride layer (SiN x ) or multiple layers thereof).

[0109] The gate electrode 1232 and the gate line may be formed on the gate insulating layer 1236. The gate electrode 1232 and the gate line may be made of a single layer or multiple layers of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy thereof.

[0110] The interlayer dielectric layer 1237 may be formed over the gate electrode 1232 and the gate line. The interlayer dielectric layer 1237 may be formed of an inorganic layer (eg, a silicon oxide layer (SiO x ), silicon nitride layer (SiN x ) or multiple layers thereof).

[0111] The source electrode 1233, the drain electrode 1234, and the data line may be formed on the interlayer dielectric layer 1237. Each of the source electrode 1233 and the drain electrode 1234 may be connected to the active layer 1231 through a contact hole penetrating the gate insulating layer 1236 and the interlayer dielectric layer 1237. The source electrode 1233, the drain electrode 1234, and the data line may be made of a single layer or a multilayer of one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu), or an alloy thereof.

[0112] The protective layer 1238 may be formed on the source electrode 1233, the drain electrode 1234, and the data line to insulate the thin film transistor 1235. The protective layer 1238 may be formed of an inorganic layer (eg, a silicon oxide layer (SiO x ), silicon nitride layer (SiN x ) or multiple layers thereof).

[0113] The planarization layer 1239 may be formed on the protective layer 1238 to provide a flat surface over the step difference of the thin film transistor 1235. The planarization layer 1239 may be formed of an organic layer such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, or polyimide resin.

[0114] The light emitting element layer 1240 is formed over the thin film transistor layer 1230. The light emitting element layer 1240 includes a light emitting element and a bank 1244.

[0115] The light emitting element and the bank 1244 are formed on the planarization layer 1239. The light emitting element may be an organic light emitting device. In this case, the light emitting element may include an anode electrode 1241, an emission layer 1242, and a cathode electrode 1243.

[0116] The anode electrode 1241 may be formed on the planarization layer 1239 . The anode electrode 1241 may be connected to the drain electrode 1234 of the corresponding thin film transistor 1235 through a contact hole penetrating the protection layer 1238 and the planarization layer 1239 .

[0117] The bank 1244 may cover the edge of the anode electrode 1241 on the planarization layer 1239 to separate pixels from each other. That is, the bank 1244 is used to define the pixel. In each of the pixels, the anode electrode 1241, the emission layer 1242, and the cathode electrode 1243 are sequentially stacked on each other so that holes from the anode electrode 1241 and electrons from the cathode electrode 1243 are combined in the emission layer 1242 to emit light.

[0118] The emission layer 1242 is formed on the anode electrode 1241 and the bank 1244. The emission layer 1242 may be an organic emission layer. The emission layer 1242 may emit one of red light, green light, and blue light. The peak wavelength range of the red light may be in the range of about 620 to 750 nm, and the peak wavelength range of the green light may be in the range of about 495 to 570 nm. In addition, the wavelength range of the blue light may be in the range of about 450 to 495 nm. Alternatively, the emission layer 1242 may be a white emission layer that emits white light. In this case, the red emission layer, the green emission layer, and the blue emission layer may be stacked on each other, or may be formed as a common layer across pixels. In this case, the first display device 210 may also include additional color filters representing red, green, and blue.

[0119] The emission layer 1242 may include a hole transport layer, a light emitting layer, and an electron transport layer. In addition, the emission layer 1242 may be formed in a series structure of two or more stacks, and in this case, a charge generation layer may be formed between the stacks.

[0120] The cathode electrode 1243 is formed on the emission layer 1242. The cathode electrode 1243 may be formed to cover the emission layer 1242. The cathode electrode 1243 may be a common layer formed across pixels.

[0121] When the light emitting element layer 1240 is a top emission type in which light is emitted toward the upper side, the anode electrode 1241 may be made of a metal material with high reflectivity (such as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and ITO (ITO / Al / ITO), an APC alloy, and a stacked structure of an APC alloy and ITO (ITO / APC / ITO)). The APC alloy is an alloy of silver (Ag), palladium (Pd), and copper (Cu). The cathode electrode 1243 may be formed of a transparent conductive material (TCP) such as ITO and IZO that can transmit light, or a semi-transmissive conductive material such as magnesium (Mg), silver (Ag), and an alloy of magnesium (Mg) and silver (Ag). When the cathode electrode 1243 is formed of a semi-transmissive conductive material, the light extraction efficiency can be increased by using a microcavity.

[0122] When the light emitting element layer 1240 is a bottom emission type in which light is emitted toward the lower side, the anode electrode 1241 may be formed of a transparent conductive material (TCP) such as ITO and IZO that can transmit light or a semi-transmissive conductive material such as magnesium (Mg), silver (Ag), and an alloy of magnesium (Mg) and silver (Ag). The cathode electrode 1243 may be made of a metal material with high reflectivity (such as a stacked structure of aluminum and titanium (Ti / Al / Ti), a stacked structure of aluminum and ITO (ITO / Al / ITO), an APC alloy, and a stacked structure of an APC alloy and ITO (ITO / APC / ITO). When the anode electrode 1241 is formed of a semi-transmissive conductive material, light extraction efficiency can be increased by using a microcavity.

[0123] The thin film encapsulation layer 1300 is formed on the light emitting element layer 1240. The thin film encapsulation layer 1300 is used to prevent oxygen or moisture from penetrating into the emission layer 1242 and the cathode electrode 1243. To this end, the thin film encapsulation layer 1300 may include at least one inorganic layer. The inorganic layer may be formed of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, or titanium oxide. In addition, the thin film encapsulation layer 1300 may also include at least one organic layer. The organic layer may have a sufficient thickness to prevent particles from penetrating into the thin film encapsulation layer 1300 to enter the emission layer 1242 and the cathode electrode 1243. The organic layer may include one of epoxy resin, acrylate, and urethane acrylate. The encapsulation substrate may be arranged on the light emitting element layer 1240 instead of the thin film encapsulation layer 1300.

[0124] The second display panel 2201 can be Figure 4 The first display panel 2101 shown in FIG. 2 is substantially identical to that shown in FIG. 21 . Therefore, redundant description will be omitted.

[0125] The first circuit board 2102 may be attached to one end of the first display panel 2101. Alternatively, when there are many signal lines and voltage lines for driving the first display panel 2101, two first circuit boards 2102 may be attached to one end and the other end of the first display panel 2101, respectively.

[0126] The second circuit board 2202 may be attached to one end of the second display panel 2201. Alternatively, when there are many signal lines and voltage lines for driving the second display panel 2201, two second circuit boards 2202 may be attached to one end and the other end of the second display panel 2201, respectively.

[0127] The first circuit board 2102 and the second circuit board 2202 may be flexible printed circuit boards.

[0128] The first driving circuit 2103 may be implemented as an integrated circuit (IC) and may be mounted on the first circuit board 2102. The first driving circuit 2103 may supply a data voltage, a power voltage, etc. for driving the first display panel 2101 to the first display panel 2101.

[0129] The second circuit board 2202 may be implemented as an integrated circuit (IC) and may be mounted on the second circuit board 2202. The second circuit board 2202 may supply a data voltage, a power voltage, etc. for driving the second display panel 2201 to the second display panel 2201.

[0130] A power source for supplying power to the first display device 210 and the second display device 220 may be incorporated into the first temple 31 or the second temple 32. The power source may be connected to the first circuit board 2102 via a first cable, and may be connected to the second circuit board 2202 via a second cable.

[0131] An optical path conversion layer may be disposed between the first display device 210 and one side surface of the first lens 110. The optical path conversion layer may change the path of light of the first display device 210 so that the light of the first display device 210 proceeds to the first active mirror 410. The optical path conversion layer may be a prism sheet including a prism mountain.

[0132] A polarizing film may be disposed between the first display device 210 and one side surface of the first lens 110. The polarizing film may include a phase retardation film such as a linear polarizer and a λ / 4 (quarter wave) plate. In this case, a linear polarizer may be disposed on one side surface of the first lens 110, and a phase retardation film may be disposed between the linear polarizer and the first display device 210. Accordingly, the polarizing film may provide light from the first display device 210 to one side surface of the first lens 110 while blocking light incident on the first display device 210 from one side surface of the first lens 110 from being reflected by the first display device 210 to be emitted through the side surface of the first lens 110.

[0133] although Figure 2 and Figure 3 It is shown that a single first active mirror 410 is arranged in the first lens 110 and a single second active mirror 420 is arranged in the second lens 120, but the number of the first active mirrors 410 arranged in the first lens 110 and the number of the second active mirrors 420 arranged in the second lens 120 are not limited thereto. That is, more than one first active mirror 410 may be arranged in the first lens 110, and more than one second active mirror 420 may be arranged in the second lens 120.

[0134] according to Figures 1 to 4In the exemplary embodiment shown in , a display device is arranged on one of the side surfaces of the lens, and the active mirror is tilted at a first angle during a first period so that an image from the display device can be provided to the user's eyes, and the active mirror is tilted at a second angle during a second period so that an image from the display device can be provided to the user's eyes. That is, the user can observe the first image displayed on the display device as a virtual image during the first period, and observe the second image displayed on the display device as a virtual image during the second period. Therefore, the portion of the display device observed by the user (i.e., the user's field of view (FOV)) can be expanded without increasing the number of mirrors or even increasing the area of ​​the display device.

[0135] Figure 5A It is shown Figure 3 An exploded perspective view of an example of a first lens.

[0136] Reference Figure 5A , the first lens 110 may include a first lens portion 111 and a second lens portion 112. The first lens portion 111 may be an upper lens portion disposed on the second lens portion 112, and the second lens portion 112 may be a lower lens portion disposed below the first lens portion 111.

[0137] Each of the first lens portion 111 and the second lens portion 112 may have a hexahedral shape including a trapezoidal top surface, a trapezoidal bottom surface, and trapezoidal first to fourth side surfaces. The top surface of each of the first lens portion 111 and the second lens portion 112 may face the user's right eye RE, and the bottom surface thereof may be opposite thereto.

[0138] The lower surface of the first lens portion 111 and the upper surface of the second lens portion 112 may face each other. The lower surface of the first lens portion 111 may be attached to the upper surface of the second lens portion 112 by a transparent adhesive material. The upper surface of the first lens portion 111 and the lower surface of the second lens portion 112 may extend in a first direction (x-axis direction) and may not be inclined at a predetermined angle. On the other hand, the lower surface of the first lens portion 111 and the upper surface of the second lens portion 112 may be inclined surfaces at a predetermined angle. The predetermined angle is measured from a third direction (z-axis direction) (i.e., the thickness direction of the first lens 110) toward a second direction (y-axis direction) (i.e., the height direction of the first lens 110).

[0139] The length of the left surface of the first lens portion 111 in the second direction (y-axis direction) may be smaller than the length of the right surface of the first lens portion 111 in the second direction (y-axis direction). The length of the left surface of the second lens portion 112 in the second direction (y-axis direction) may be larger than the length of the right surface of the second lens portion 112 in the second direction (y-axis direction).

[0140] The second lens portion 112 may have a groove AG formed in the upper surface thereof for receiving the first active mirror 410. Figure 5A In the example shown in FIG. 1 , the groove AG is formed as a quadrangular groove in the upper surface of the second lens portion 112 , but it should be understood that the groove AG may be formed in a polygonal shape other than a quadrangular shape, a circular shape, or an elliptical shape.

[0141] The bottom of the groove AG may be inclined at a third predetermined angle θ3 measured from the third direction (z-axis direction) (ie, the thickness direction of the first lens 110 ) toward the second direction (y-axis direction) (ie, the height direction of the first lens 110 ).

[0142] A mirror supporter connected to the first active mirror 410 to support the first active mirror 410 , and a first electrode and a second electrode for driving the first active mirror 410 may be formed on the bottom of the groove AG.

[0143] The first electrode, the second electrode, and the mirror support may be arranged in parallel in a third direction (z-axis direction), ie, a thickness direction of the first lens 110. The mirror support may be disposed between the first electrode and the second electrode in the third direction (z-axis direction).

[0144] A first driving line DL1 connected to the first electrode, a second driving line DL2 connected to the second electrode, and a third driving line DL3 connected to the mirror support may be formed on the second lens portion 112. A driving voltage may be applied to each of the first driving line DL1, the second driving line DL2, and the third driving line DL3.

[0145] The first driving line DL1 may be connected to the first electrode on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the upper surface of the second lens portion 112, and the right surface of the second lens portion 112. The second driving line DL2 may be connected to the second electrode on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the upper surface of the second lens portion 112, and the right surface of the second lens portion 112. The third driving line DL3 may be connected to the mirror support on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the upper surface of the second lens portion 112, and the right surface of the second lens portion 112. Alternatively, the first driving line DL1, the second driving line DL2, and the third driving line DL3 may be arranged on the left surface of the second lens portion 112 instead of the right surface of the second lens portion 112.

[0146] The first drive line DL1, the second drive line DL2, and the third drive line DL3 may be connected to a third cable or sheathed wire. The third cable or sheathed wire may be connected to a power source incorporated into the first temple 31 or the second temple 32 to apply power to the first display device 210 and the second display device 220. Alternatively, the third cable or sheathed wire may be connected to the first circuit board 2102. The third cable or sheathed wire may be covered by the top bar 20 and the first lens frame 21.

[0147] The first electrode, the second electrode, the mirror support, the first drive line DL1, the second drive line DL2, and the third drive line DL3 may be made of a transparent conductive material such as a transparent conductive oxide. Accordingly, it is possible to prevent light from the first display device 210 from being reflected or interfered by the first electrode, the second electrode, the mirror support, the first drive line DL1, the second drive line DL2, and the third drive line DL3. One of the bottom surfaces of the first active mirror 410 may be connected to the mirror support to receive a driving voltage via the mirror support and the third drive line DL3. Another of the bottom surfaces of the first active mirror 410 may be formed of a metal having a high reflectivity, such as silver (Ag).

[0148] In order to reduce the difference in refractive index between the groove AG and the first lens portion 111 and between the groove AG and the second lens portion 112 or to match the refractive index, the groove AG may be filled with a fluid such as a liquid or a gas. For example, the difference in refractive index between the fluid in the groove AG and the first lens portion 111 and the difference in refractive index between the fluid and the second lens portion 112 are preferably 0.5 or less.

[0149] Figure 5B It is shown Figure 3 An exploded perspective view of an example of a first lens.

[0150] Figure 5B The first lens portion 111 and the second lens portion 112 shown in FIG. Figure 5A The lenses shown in are substantially identical except that they have a hexahedral shape including a rectangular top, a bottom, and first to fourth side surfaces, and therefore, any redundant description will be omitted.

[0151] Reference Figure 5B, each of the first lens portion 111 and the second lens portion 112 may be formed as a hexahedron including a rectangular top surface, a rectangular bottom surface, and a rectangular first side surface to a fourth side surface. In this case, the upper surface and the lower surface of the first lens portion 111 and the upper surface and the lower surface of the second lens portion 112 may extend in the first direction (x-axis direction) and may not be inclined at a predetermined angle. The length of the left surface of the first lens portion 111 in the second direction (y-axis direction) may be substantially equal to the length of its right surface in the second direction (y-axis direction). The length of the left surface of the second lens portion 112 in the second direction (y-axis direction) may be substantially equal to the length of the right surface of the second lens portion 112 in the second direction (y-axis direction).

[0152] The lower surface of the first lens portion 111 and the upper surface of the second lens portion 112 are not inclined, but the bottom of the groove AG may be inclined at a third predetermined angle θ3. The third predetermined angle θ3 is measured from the third direction (z-axis direction) (i.e., the thickness direction of the first lens 110) toward the second direction (y-axis direction) (i.e., the height direction of the first lens 110).

[0153] Figure 5C It is shown Figure 3 An exploded perspective view of an example of a first lens.

[0154] Figure 5C An exemplary embodiment of Figure 5A The exemplary embodiment shown in is different in that the first lens portion 111 is arranged below the second lens portion 112, and the groove AG is formed in the lower surface of the second lens portion 112. The description will focus on the difference, and any redundant description will be omitted.

[0155] Reference Figure 5C , a groove AG for accommodating the first active mirror 410 may be formed in the lower surface of the second lens portion 112. Figure 5C In the example shown in FIG. 1 , the groove AG is formed as a quadrangular groove in the lower surface of the second lens portion 112 , but it should be understood that the groove AG may be formed in a polygonal shape other than a quadrangular shape, a circular shape, or an elliptical shape.

[0156] The bottom of the groove AG may be inclined at a third predetermined angle θ3 measured from the third direction (z-axis direction) (ie, the thickness direction of the first lens 110 ) toward the second direction (y-axis direction) (ie, the height direction of the first lens 110 ).

[0157] A mirror support member connected to the first active mirror 410 to support the first active mirror 410, a first electrode, and a second electrode may be formed on the bottom of the groove AG. A first driving line DL1 connected to the first electrode, a second driving line DL2 connected to the second electrode, and a third driving line DL3 connected to the mirror support member may be formed on the second lens portion 112. A driving voltage may be applied to each of the first driving line DL1, the second driving line DL2, and the third driving line DL3.

[0158] The first driving line DL1 may be connected to the first electrode on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the lower surface of the second lens portion 112, and the right surface of the second lens portion 112. The second driving line DL2 may be connected to the second electrode on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the lower surface of the second lens portion 112, and the right surface of the second lens portion 112. The third driving line DL3 may be connected to the mirror support on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the lower surface of the second lens portion 112, and the right surface of the second lens portion 112. Alternatively, the first driving line DL1, the second driving line DL2, and the third driving line DL3 may be arranged on the left surface of the second lens portion 112 instead of the right surface of the second lens portion 112.

[0159] The first, second, and third driving lines DL1, DL2, and DL3 may be connected to a third cable or sheath wire.

[0160] One of the bottom surfaces of the first active mirror 410 may be connected to the mirror support. Since the first active mirror 410 is arranged in the lower surface of the second lens portion 112, a metal having high reflectivity, such as silver (Ag), may be formed on the bottom surface of the first active mirror 410 connected to the mirror support.

[0161] Figure 5D It is shown Figure 3 An exploded perspective view of an example of a first lens.

[0162] Figure 5D The first lens portion 111 and the second lens portion 112 shown in FIG. Figure 5C The lenses shown in are substantially identical except that they have a hexahedral shape including a rectangular top, a bottom, and first to fourth side surfaces, and therefore, any redundant description will be omitted.

[0163] Reference Figure 5D, each of the first lens portion 111 and the second lens portion 112 may be formed as a hexahedron including a rectangular top surface, a rectangular bottom surface, and a rectangular first side surface to a fourth side surface. In this case, the upper surface and the lower surface of the first lens portion 111 and the upper surface and the lower surface of the second lens portion 112 may extend in the first direction (x-axis direction) and may not be inclined at a predetermined angle. The length of the left surface of the first lens portion 111 in the second direction (y-axis direction) may be substantially equal to the length of its right surface in the second direction (y-axis direction). The length of the left surface of the second lens portion 112 in the second direction (y-axis direction) may be substantially equal to the length of the right surface of the second lens portion 112 in the second direction (y-axis direction).

[0164] The lower surface of the first lens portion 111 and the upper surface of the second lens portion 112 are not inclined, but the bottom of the groove AG may be inclined at a third predetermined angle θ3. The third predetermined angle θ3 is measured from the third direction (z-axis direction) (i.e., the thickness direction of the first lens 110) toward the second direction (y-axis direction) (i.e., the height direction of the first lens 110).

[0165] The second lens 120 may be FIG. 5A to FIG. 5D The first lens 110 shown in FIG. 1 is formed in substantially the same manner as that shown in FIG. 1 . Therefore, any redundant description will be omitted.

[0166] Figure 6 The layout is shown in detail Figure 5A Cross-sectional view of an example of a first electrode, a second electrode, a mirror support and a first active mirror in a groove of. Fig. 7A and Figure 7B is a view showing how the tilt angle of the first active mirror changes according to a driving voltage applied to the first electrode, the second electrode, and the first active mirror.

[0167] Reference Figure 6 A first electrode 411 and a second electrode 412 for driving the first active mirror 410 , and a mirror support 413 connected to the first active mirror 410 to support the first active mirror 410 may be formed on the bottom FL of the groove AG.

[0168] The first electrode 411 may be connected to the first driving line DL1. The first electrode 411 may receive a driving voltage through the first driving line DL1. The first driving line DL1 may be disposed on the bottom FL and the first sidewall SW1 of the groove AG.

[0169] The second electrode 412 may be connected to the second driving line DL2. The second electrode 412 may receive a driving voltage via the second driving line DL2. The second driving line DL2 may be disposed on the bottom FL and the second sidewall SW2 of the groove AG.

[0170] The first end of the mirror support 413 may be connected to the third driving line DL3. The mirror support 413 may receive a driving voltage through the third driving line DL3. The third driving line DL3 may be disposed on the bottom FL and the third sidewall (not shown) of the groove AG.

[0171] The second end of the mirror supporter 413 may be connected to the center or the vicinity of the center of the lower surface of the first active mirror 410. The mirror supporter 413 may support the first active mirror 410.

[0172] The first electrode 411, the second electrode 412, and the mirror support 413 may be arranged in parallel in the same direction. The mirror support 413 may be arranged between the first electrode 411 and the second electrode 412 in the same direction. For example, the first electrode 411, the second electrode 412, and the mirror support 413 may be arranged in parallel in a third direction (z-axis direction) (i.e., a thickness direction of the first lens 110). The mirror support 413 may be arranged between the first electrode 411 and the second electrode 412 in the third direction (z-axis direction).

[0173] The first electrode 411, the second electrode 412, and the mirror support 413 may be made of a transparent conductive material such as a transparent conductive oxide.

[0174] The first bottom surface of the first active mirror 410 may be connected to the mirror support 413 and may be formed of a transparent conductive material. The second bottom surface of the first active mirror 410 may be formed of a metal having a high reflectivity, such as silver (Ag). The first active mirror 410 and the mirror support 413 may be formed as a single piece.

[0175] like Fig. 7A As shown in , when a first driving voltage is applied to the first electrode 411 and a second driving voltage is applied to the second electrode 412 and the first active mirror 410, an attractive force may act between the first electrode 411 and the first active mirror 410, and a repulsive force may act between the second electrode 412 and the first active mirror 410. The first driving voltage may be a positive polarity voltage, and the second driving voltage may be a negative polarity voltage. A positive polarity voltage refers to a voltage higher than 0V, and a negative polarity voltage refers to a voltage lower than 0V. Accordingly, the first active mirror 410 may be tilted toward the first electrode 411. That is, the first active mirror 410 may be tilted at a first angle θ1. When this occurs, the first active mirror 410 becomes closer to the first electrode 411 and further away from the second electrode 412. The first active mirror 410 may be in contact with the first electrode 411.

[0176] like Figure 7BAs shown in , when a first driving voltage is applied to the second electrode 412 and a second driving voltage is applied to the first electrode 411 and the first active mirror 410, an attractive force may act between the second electrode 412 and the first active mirror 410, and a repulsive force may act between the first electrode 411 and the first active mirror 410. Accordingly, the first active mirror 410 may be tilted toward the second electrode 412. That is, the first active mirror 410 may be tilted at a second angle θ2. When this occurs, the first active mirror 410 becomes closer to the second electrode 412 and further away from the first electrode 411. The first active mirror 410 may be in contact with the second electrode 412.

[0177] Each of the first angle θ1 and the second angle θ2 is measured from a third direction (z-axis direction), ie, a thickness direction of the first lens 110 , toward a second direction (y-axis direction), ie, a height direction of the first lens 110 .

[0178] according to Figure 6 , Fig. 7A and Figure 7B , the first active mirror 410 may be tilted toward the first electrode 411 or the second electrode 412 according to the voltage applied to the first electrode 411, the second electrode 412, and the first active mirror 410. That is, the angle at which the first active mirror 410 is tilted may be adjusted by the driving voltage applied to the first electrode 411, the second electrode 412, and the first active mirror 410.

[0179] The second active mirror 420 may be substantially Figure 6 , Fig. 7A and Figure 7B , and therefore, the second active mirror 420 will not be described.

[0180] Figure 8 is a flowchart illustrating a method for providing augmented reality by an optical device according to an exemplary embodiment of the present invention. Fig. 9A and Fig. 9B is a view illustrating an example of a method of providing augmented reality by an optical device according to an exemplary embodiment of the present invention.

[0181] First, during a first period, the first display device 210 displays a first image, and the second display device 220 displays a second image. The first image is provided to the user's right eye RE during the first period, and the second image is provided to the user's left eye LE during the first period. The first image may be substantially consistent with the second image. Figure 8 Step S101 and step S102 in

[0182] Secondly, if Fig. 9AAs shown in , by applying a first driving voltage to the first electrode 411 and applying a second driving voltage to the second electrode 412 and the first active mirror 410 during a first period, the first active mirror 410 is tilted at a first angle θ1. Fig. 9A As shown in , the first angle θ1 is measured from the third direction (z-axis direction) (i.e., the thickness direction of the first lens 110) toward the second direction (y-axis direction) (i.e., the height direction of the first lens 110). As a result, during the first period, the first image displayed on the first display device 210 may be reflected by the first active mirror 410 and may be emitted through the exit surface of the first lens 110 to be provided to the user's right eye RE. ( Figure 8 Step S103)

[0183] Like the first active mirror 410, during the first period, the second active mirror 420 may also be tilted at the first angle θ1. As a result, during the first period, the second image displayed on the second display device 220 may be reflected by the second active mirror 420 and may be emitted through the emission surface of the second lens 120 to be provided to the left eye LE of the user.

[0184] Third, during the second period, the first display device 210 displays the third image, and the second display device 220 displays the fourth image. The third image is provided to the user's right eye RE during the second period, and the fourth image is provided to the user's left eye LE during the second period. The third image may be substantially consistent with the fourth image. Figure 8 Step S104 and Step S105)

[0185] Fourth, if Fig. 9B As shown in , by applying the first driving voltage to the second electrode 412 and applying the second driving voltage to the first electrode 411 and the first active mirror 410 during the second period, the first active mirror 410 is tilted at the second angle θ2. Fig. 9B As shown in , the second angle θ2 is measured from the third direction (z-axis direction) (i.e., the thickness direction of the first lens 110) toward the second direction (y-axis direction) (i.e., the height direction of the first lens 110). As a result, during the second period, the third image displayed on the first display device 210 may be reflected by the first active mirror 410 and may be emitted through the exit surface of the first lens 110 to be provided to the user's right eye RE. ( Figure 8 Step S106)

[0186] Like the first active mirror 410, during the second period, the second active mirror 420 may also be tilted at the second angle θ2. As a result, during the second period, the fourth image displayed on the second display device 220 may be reflected by the second active mirror 420 and may be emitted through the emission surface of the second lens 120 to be provided to the left eye LE of the user.

[0187] according to Figure 8 , Fig. 9A and Fig. 9B In the exemplary embodiment shown in , the active mirror is tilted at a first angle during a first period so that an image from the display device can be provided to the user's eyes, and the active mirror is tilted at a second angle during a second period so that an image from the display device can be provided to the user's eyes. That is, the user can observe the image displayed on the display device as a virtual image during the first period, and observe the image displayed on the display device as a virtual image during the second period. Therefore, the portion of the display device observed by the user (i.e., the user's field of view (FOV)) can be expanded without increasing the number of mirrors or even increasing the area of ​​the display device.

[0188] Furthermore, since the first display device 210 displays the first image during the first period and displays the third image during the second period, it is desirable to display the first image during the odd frame and display the third image during the even frame at a frame frequency of 120 Hz. In this case, the first active mirror 410 is synchronized with the first display device 210 so that it can be tilted at the first angle θ1 during the odd frame period and at the second angle θ2 during the even frame period.

[0189] Fig.10 is an exploded perspective view showing an optical device according to an exemplary embodiment of the present invention. Fig.11 It is shown Fig.10 A perspective view of an example of a first lens, a first display device, and a third display device.

[0190] Fig.10 and Fig.11 The exemplary embodiments shown in Figure 2 and Figure 3 The exemplary embodiment shown in FIG. 1 is different in that the third display device 211 is arranged on one of the side surfaces of the first lens 110, and the fourth display device 221 is arranged on one of the side surfaces of the second lens 120. The description will focus on the difference between the exemplary embodiments, and any redundant description will be omitted.

[0191] Reference Fig.10 and Fig.11 , each of the third display device 211 and the fourth display device 221 displays a virtual image for realizing augmented reality. The third display device 211 may display the third image as a virtual image, and the fourth display device 221 may display the fourth image as a virtual image.

[0192] The third display device 211 may include a third display panel 2111 , a third circuit board 2112 , and a third driving circuit 2113 . The fourth display device 221 may include a fourth display panel 2211 , a fourth circuit board 2212 , and a fourth driving circuit 2213 .

[0193] The third display panel 2111 may be arranged on one of the side surfaces of the first lens 110. For example, the first display panel 2101 may be arranged on the upper side of the first lens 110, and the third display panel 2111 may be arranged on the lower side of the first lens 110. That is, the first display panel 2101 and the third display panel 2111 may face each other. The first display panel 2101 and the third display panel 2111 may be covered by the top bar 20 and the first lens frame 21.

[0194] The fourth display panel 2211 may be arranged on one of the side surfaces of the second lens 120. For example, the second display panel 2201 may be arranged on the upper surface of the second lens 120, and the fourth display panel 2211 may be arranged on the lower surface of the second lens 120. That is, the second display panel 2201 and the fourth display panel 2211 may face each other. The second display panel 2201 and the fourth display panel 2211 may be covered by the top bar 20 and the second lens frame 22.

[0195] Each of the third display panel 2111 and the fourth display panel 2211 may be a flexible display panel that can be bent, rolled or curved. For example, each of the third display panel 2111 and the fourth display panel 2211 may be an organic light emitting display panel or an organic light emitting display panel including quantum dots. Figure 4 The first display panel 2101 shown in FIG. 2 is substantially identical to that shown in FIG. 2101. Therefore, the third display panel 2111 and the fourth display panel 2211 will not be described.

[0196] Fig.12 It is shown Fig.11 An exploded perspective view of an example of a first lens.

[0197] Reference Fig.12 , the first lens 110 may include a first lens portion 111 and a second lens portion 112. The first lens portion 111 may be an upper lens portion disposed on the second lens portion 112, and the second lens portion 112 may be a lower lens portion disposed below the first lens portion 111.

[0198] Each of the first lens portion 111 and the second lens portion 112 may have a hexahedral shape including a rectangular top surface, a rectangular bottom surface, and rectangular first to fourth side surfaces. The top surface of the first lens portion 111 may face the user's right eye RE, and its bottom surface may be opposite to the upper surface. The top surface of the second lens portion 112 may face the lower surface of the first lens portion 111, and its bottom surface may be opposite to the upper surface.

[0199] The second lens portion 112 may have a groove AG formed in the top surface thereof for receiving the first active mirror 410. Fig.12 In the example shown in FIG. 1 , the groove AG is formed as a quadrangular groove in the top surface of the second lens portion 112 , but it should be understood that the groove AG may be formed in a polygonal shape other than a quadrangular shape, a circular shape, or an elliptical shape.

[0200] A mirror support 413 connected to the first active mirror 410 to support the first active mirror 410, a first electrode 411 and a second electrode 412 for driving the first active mirror 410 may be formed on the bottom of the groove AG. A first driving line DL1 connected to the first electrode 411, a second driving line DL2 connected to the second electrode 412, and a third driving line DL3 connected to the mirror support 413 may be formed on the second lens portion 112. A driving voltage may be applied to each of the first driving line DL1, the second driving line DL2, and the third driving line DL3.

[0201] The first driving line DL1 may be connected to the first electrode 411 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the top surface of the second lens portion 112, and the left surface of the second lens portion 112. The second driving line DL2 may be connected to the second electrode 412 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the top surface of the second lens portion 112, and the left surface of the second lens portion 112. The third driving line DL3 may be connected to the mirror support 413 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the top surface of the second lens portion 112, and the left surface of the second lens portion 112. Alternatively, the first driving line DL1, the second driving line DL2, and the third driving line DL3 may be arranged on the right surface of the second lens portion 112 instead of the left surface of the second lens portion 112.

[0202] The first drive line DL1, the second drive line DL2, and the third drive line DL3 may be connected to a third cable or sheathed wire. The third cable or sheathed wire may be connected to a power source incorporated into the first temple 31 or the second temple 32 to apply power to the first display device 210 and the second display device 220. Alternatively, the third cable or sheathed wire may be connected to the first circuit board 2102 or the third circuit board 2112. The third cable or sheathed wire may be covered by the top bar 20 and the first lens frame 21.

[0203] The first electrode 411, the second electrode 412, the mirror support 413, the first drive line DL1, the second drive line DL2, and the third drive line DL3 may be made of a transparent conductive material such as a transparent conductive oxide. Accordingly, it is possible to prevent light from the first display device 210 from being reflected or interfered by the first electrode 411, the second electrode 412, the mirror support 413, the first drive line DL1, the second drive line DL2, and the third drive line DL3. One of the bottom surfaces of the first active mirror 410 may be connected to the mirror support 413, and a metal with high reflectivity (such as silver (Ag)) may be formed on the other of the bottom surfaces of the first active mirror 410.

[0204] The bottom of the groove AG may extend in the second direction (y-axis direction), that is, the height direction of the first lens 110. In this case, the first electrode 411, the second electrode 412, and the mirror support 413 may be arranged in parallel in the second direction (y-axis direction). The mirror support 413 may be arranged between the first electrode 411 and the second electrode 412 in the second direction (y-axis direction).

[0205] Each of the first active mirror 410 and the second active mirror 420 may be implemented as an electrostatic mirror, a micromirror, or a piezoelectric mirror used in a digital micromirror device (DMD). In the following description, for convenience of explanation, each of the first active mirror 410 and the second active mirror 420 is implemented as Figure 6 , Fig. 7A and Figure 7B The electrostatic mirror shown in .

[0206] Fig.13 is a flowchart illustrating a method for providing augmented reality by an optical device according to an exemplary embodiment of the present invention. Fig.14A and Fig. 14B 2 is a view showing an example of a method for providing augmented reality by an optical device according to an exemplary embodiment of the present invention.

[0207] First, during a first period, the first display device 210 displays a first image, and the second display device 220 displays a second image. The first image is provided to the user's right eye RE during the first period, and the second image is provided to the user's left eye LE during the first period. The first image may be substantially consistent with the second image. Fig.13 Step S201 and Step S202)

[0208] Secondly, if Fig.14A As shown in , by applying a first driving voltage to the first electrode 411 and applying a second driving voltage to the second electrode 412 and the first active mirror 410 during the first period, the first active mirror 410 is tilted at a fourth angle θ4. Fig.14A As shown in , the fourth angle θ4 is measured from the second direction (y-axis direction) (i.e., the height direction of the first lens 110) toward the third direction (z-axis direction) (i.e., the thickness direction of the first lens 110). As a result, during the first period, the first image of the first display device 210 arranged on the upper surface of the first lens 110 may be reflected by the first active mirror 410 and may be emitted through the exit surface of the first lens 110 to be provided to the right eye RE of the user. ( Fig.13 Step S203)

[0209] Like the first active mirror 410, during the first period, the second active mirror 420 may also be tilted at the fourth angle θ4. As a result, during the first period, the second image of the second display device 220 disposed on the upper surface of the second lens 120 may be reflected by the second active mirror 420 and may be emitted through the exit surface of the second lens 120 to be provided to the left eye LE of the user.

[0210] Third, during the second period, the third display device 211 displays the third image, and the fourth display device 221 displays the fourth image. The third image is provided to the user's right eye RE during the second period, and the fourth image is provided to the user's left eye LE during the second period. The third image may be substantially consistent with the fourth image. Fig.13 Steps S204 and S205)

[0211] Fourth, if Fig. 14B As shown in , by applying the first driving voltage to the second electrode 412 during the second period and applying the second driving voltage to the first electrode 411 and the first active mirror 410, the first active mirror 410 is tilted at a fifth angle θ5. Fig. 14B As shown in , the fifth angle θ5 is measured from the second direction (y-axis direction) (i.e., the height direction of the first lens 110) toward the third direction (z-axis direction) (i.e., the thickness direction of the first lens 110). As a result, during the second period, the third image of the third display device 211 arranged on the lower surface of the first lens 110 may be reflected by the first active mirror 410 and may be emitted through the exit surface of the first lens 110 to be provided to the right eye RE of the user. ( Fig.13 Step S206)

[0212] Like the first active mirror 410, during the second period, the second active mirror 420 may also be tilted at the fifth angle θ5. As a result, during the second period, the fourth image of the fourth display device 221 disposed on the lower surface of the second lens 120 may be reflected by the second active mirror 420 and may be emitted through the emission surface of the second lens 120 to be provided to the left eye LE of the user.

[0213] according to Fig.13 , Fig.14A and Fig. 14B In the exemplary embodiment shown in , the active mirror is tilted at a fourth angle during a first period so that an image from a display device arranged on one side surface of the lens can be provided to the user's eyes, and the active mirror is tilted at a fifth angle during a second period so that an image from a display device arranged on another side surface of the lens can be provided to the user's eyes. That is, the user can observe the image displayed on the display device arranged on one side surface of the lens as a virtual image during the first period, and observe the image displayed on the display device arranged on another side surface of the lens as a virtual image during the second period. Therefore, the portion of the display device observed by the user (i.e., the user's field of view (FOV)) can be expanded without increasing the number of mirrors.

[0214] In addition, since the first active mirror 410 is controlled to be tilted at the fourth angle θ4 during the odd frame period and tilted at the fifth angle θ5 during the even frame period, the first display device 210 can display the first image during the first period and the second period, and the third display device 211 can display the third image during the first period and the second period. That is, the first active mirror 410 can be controlled to be tilted at the fourth angle θ4 and the fifth angle θ5 at a frame frequency of 120 Hz, and the first display device 210 and the third display device 211 can be driven at a frame frequency of 60 Hz.

[0215] Fig.15 is an exploded perspective view showing an optical device according to an exemplary embodiment of the present invention, and Fig.16 It is shown Fig.15 A perspective view of an example of a first lens, a first display device, and a third display device.

[0216] Fig.15 and Fig.16 The exemplary embodiments shown in Fig.10 and Fig.11 The exemplary embodiment shown in FIG. 1 is different in that the first display device 210 is arranged on the left surface of the first lens 110, and the third display device 211 is arranged on the right surface of the first lens 110, and the second display device 220 is arranged on the left surface of the second lens 120, and the fourth display device 221 is arranged on the right surface of the second lens 120. Fig.10 and Fig.11 The components are consistent Fig.15 and Fig.16 The elements will not be described to avoid redundancy.

[0217] Fig.17 It is shown Fig.16 An exploded perspective view of an example of a first lens.

[0218] Fig.17 The exemplary embodiments shown in Fig.12 The exemplary embodiment shown in FIG. 1 is substantially the same, except that the first electrode 411, the second electrode 412, and the mirror support 413 in the groove AG are arranged in parallel in the first direction (x-axis direction) (i.e., the width direction of the first lens 110), and the mirror support 413 is arranged between the first electrode 411 and the second electrode 412 in the first direction (x-axis direction). The description will focus on the differences, and redundant descriptions will be omitted.

[0219] Reference Fig.17 , the bottom of the groove AG may extend in the first direction (x-axis direction) (i.e., the width direction of the first lens 110). In this case, the first electrode 411, the second electrode 412, and the mirror support 413 may be arranged in parallel in the first direction (x-axis direction). The mirror support 413 may be arranged between the first electrode 411 and the second electrode 412 in the first direction (x-axis direction).

[0220] The first driving line DL1 may be connected to the first electrode 411 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the top surface of the second lens portion 112, and the upper surface of the second lens portion 112. The second driving line DL2 may be connected to the second electrode 412 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the top surface of the second lens portion 112, and the upper surface of the second lens portion 112. The third driving line DL3 may be connected to the mirror support 413 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the top surface of the second lens portion 112, and the upper surface of the second lens portion 112. Alternatively, the first driving line DL1, the second driving line DL2, and the third driving line DL3 may be arranged on the lower surface of the second lens portion 112 instead of the upper surface of the second lens portion 112.

[0221] Fig.18A and Fig.18B 2 is a view showing an example for illustrating a method of providing augmented reality by an optical device according to an exemplary embodiment of the present invention.

[0222] Fig.18A and Fig.18B The exemplary embodiments shown in Fig.13 , Fig.14A and Fig. 14BThe exemplary embodiment shown in FIG. 1 is different in that the first display device 210 is arranged on the left surface of the first lens 110, and the third display device 211 is arranged on the right surface of the first lens 110, so that the first active mirror 410 is tilted at the sixth angle θ6 during the first period and tilted at the seventh angle θ7 during the second period. Fig.18A and Fig.18B As shown in , each of the sixth angle θ6 and the seventh angle θ7 is measured from the first direction (x-axis direction) (ie, the width direction of the first lens 110) toward the third direction (z-axis direction) (ie, the thickness direction of the first lens 110).

[0223] Fig.19 It is shown Figure 2 A perspective view of an example of a first lens and a first display device.

[0224] Fig.19 The exemplary embodiments shown in Figure 3 The exemplary embodiment shown in FIG. 1 is different in that the first display panel 2101 of the first display device 210 is divided into four areas. The description will focus on the difference, and any redundant description will be omitted.

[0225] Reference Fig.19 , the first display panel 2101 of the first display device 210 can be divided into a first area A1, a second area A2, a third area A3 and a fourth area A4. Fig.19 As shown in , the first area A1 may be an upper left area, the second area A2 may be an upper right area, the third area A3 may be a lower left area, and the fourth area A4 may be a lower right area.

[0226] During the first to fourth periods, the first display device 210 may display the first sub-image in the first area A1, the second sub-image in the second area A2, the third sub-image in the third area A3, and the fourth sub-image in the fourth area A4. In this case, the first display device 210 may be driven at a frame frequency of 60 Hz, but the user may observe images mixed with each other during the first to fourth periods.

[0227] Alternatively, the first display device 210 may display the first sub-image in the first area A1 during the first period and display a black image in other areas, may display the second sub-image in the second area A2 during the second period and display a black image in other areas, may display the third sub-image in the third area A3 during the third period and display a black image in other areas, and may display the fourth sub-image in the fourth area A4 during the fourth period and display a black image in other areas. In this case, although it is required to drive the first display device 210 at a frame rate of 240 Hz, it is possible to prevent the user from observing images mixed with each other during the first to fourth periods.

[0228] Alternatively, during the first and second cycles, the first display device 210 may display the first sub-image in the first area A1, the fourth sub-image in the fourth area A4, and a black image in other areas. In addition, during the third and fourth cycles, the first display device 210 may display the second sub-image in the second area A2, the third sub-image in the third area A3, and a black image in other areas. In this case, although it is required to drive the first display device 210 at a frame rate of 120 Hz, it is possible to suppress the user from observing images mixed with each other during the first to fourth cycles.

[0229] Fig. 20 It is shown Fig.19 An exploded perspective view of an example of a first lens.

[0230] Fig. 20 The exemplary embodiments shown in Figure 5A The exemplary embodiment shown in FIG. 1 is different in that a fourth driving line DL4 and a fifth driving line DL5 are additionally arranged on the second lens portion 112. The description will focus on the difference, and any redundant description will be omitted.

[0231] Reference Fig. 20 A mirror support 413 connected to the first active mirror 410 to support the first active mirror 410, a first electrode 411 for driving the first active mirror 410, a second electrode 412, a third electrode 414 and a fourth electrode 415 may be formed on the bottom of the groove AG.

[0232] The first electrode 411, the fourth electrode 415, and the mirror support 413 may be arranged in parallel in the direction DR1. The mirror support 413 may be disposed between the first electrode 411 and the fourth electrode 415 in the direction DR1. The direction DR1 may be defined as a direction between the opposite first direction (negative x-axis direction), i.e., the width direction of the first lens 110, and the third direction (z-axis direction), i.e., the thickness direction of the first lens 110.

[0233] The third electrode 414, the second electrode 412, and the mirror support 413 may be arranged in parallel in another direction DR2 intersecting the direction DR1. The mirror support 413 may be disposed between the third electrode 414 and the second electrode 412 in the other direction DR2. The other direction DR2 may be defined as a direction between the first direction (x-axis direction), i.e., the width direction of the first lens 110, and the third direction (z-axis direction), i.e., the thickness direction of the first lens 110.

[0234] A first driving line DL1 connected to the first electrode 411, a second driving line DL2 connected to the second electrode 412, a third driving line DL3 connected to the mirror support 413, a fourth driving line DL4 connected to the third electrode 414, and a fifth driving line DL5 connected to the fourth electrode 415 may be formed on the second lens portion 112. A driving voltage may be applied to each of the first driving line DL1, the second driving line DL2, the third driving line DL3, the fourth driving line DL4, and the fifth driving line DL5.

[0235] The first driving line DL1 may be connected to the first electrode 411 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the upper surface of the second lens portion 112, and the right surface of the second lens portion 112. The second driving line DL2 may be connected to the second electrode 412 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the upper surface of the second lens portion 112, and the right surface of the second lens portion 112. The third driving line DL3 may be connected to the mirror support 413 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the upper surface of the second lens portion 112, and the right surface of the second lens portion 112. The fourth driving line DL4 may be connected to the third electrode 414 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the upper surface of the second lens portion 112, and the right surface of the second lens portion 112. The fifth driving line DL5 may be connected to the fourth electrode 415 on the bottom of the groove AG, and may be arranged on at least one of the sidewalls of the groove AG, the upper surface of the second lens portion 112, and the right surface of the second lens portion 112. Alternatively, the first driving line DL1, the second driving line DL2, the third driving line DL3, the fourth driving line DL4, and the fifth driving line DL5 may be arranged on the left surface of the second lens portion 112 instead of the right surface of the second lens portion 112.

[0236] Each of the first drive line DL1, the second drive line DL2, the third drive line DL3, the fourth drive line DL4, and the fifth drive line DL5 may be connected to a third cable or sheathed wire. The third cable or sheathed wire may be connected to a power source incorporated into the first temple 31 or the second temple 32 to apply power to the first display device 210 and the second display device 220. Alternatively, the third cable or sheathed wire may be connected to the first circuit board 2102. The third cable or sheathed wire may be covered by the top bar 20 and the first lens frame 21.

[0237] The first electrode 411, the second electrode 412, the third electrode 414, the fourth electrode 415, the mirror support 413, the first drive line DL1, the second drive line DL2, the third drive line DL3, the fourth drive line DL4 and the fifth drive line DL5 may be made of a transparent conductive material such as a transparent conductive oxide. Accordingly, it is possible to prevent light from the first display device 210 from being reflected or interfered by the first electrode 411, the second electrode 412, the third electrode 414, the fourth electrode 415, the mirror support 413, the first drive line DL1, the second drive line DL2, the third drive line DL3, the fourth drive line DL4 and the fifth drive line DL5. One of the bottom surfaces of the first active mirror 410 may be connected to the mirror support 413, and a metal with high reflectivity (such as silver (Ag)) may be formed on the other of the bottom surfaces of the first active mirror 410.

[0238] like Fig. 20 As shown in FIG, a first electrode 411, a second electrode 412, a third electrode 414 and a fourth electrode 415 for driving the first active mirror 410, and a mirror support 413 connected to the first active mirror 410 to support the first active mirror 410 may be formed on the bottom FL of the groove AG.

[0239] The third electrode 414 may be connected to the fourth driving line DL4. The third electrode 414 may receive a driving voltage via the fourth driving line DL4. The fourth driving line DL4 may be disposed on the bottom FL and the second sidewall SW2 of the groove AG.

[0240] The fourth electrode 415 may be connected to the fifth driving line DL5. The fourth electrode 415 may receive a driving voltage via the fifth driving line DL5. The fifth driving line DL5 may be disposed on the bottom FL and the second sidewall SW2 of the groove AG.

[0241] The first electrode 411, the second electrode 412, and the mirror support 413 may be arranged in parallel in the direction DR1. The mirror support 413 may be disposed between the first electrode 411 and the second electrode 412 in the direction DR1. The direction DR1 may be defined as a direction between a first direction (x-axis direction), i.e., a width direction of the first lens 110, and a third direction (z-axis direction), i.e., a thickness direction of the first lens 110.

[0242] The third electrode 414, the fourth electrode 415, and the mirror support 413 may be arranged in parallel in another direction DR2 intersecting the direction DR1, and the mirror support 413 may be disposed in the other direction DR2 between the third electrode 414 and the fourth electrode 415. The other direction DR2 may be defined as a direction between the first direction (x-axis direction), i.e., the width direction of the first lens 110, and the third direction (z-axis direction), i.e., the thickness direction of the first lens 110.

[0243] The first electrode 411, the second electrode 412, the third electrode 414, the fourth electrode 415, and the mirror support 413 may be made of a transparent conductive material such as a transparent conductive oxide.

[0244] When a first driving voltage is applied to the first electrode 411 and a second driving voltage is applied to the second electrode 412, the third electrode 414, the fourth electrode 415, and the first active mirror 410, an attractive force may act between the first electrode 411 and the first active mirror 410, and a repulsive force may act between the second electrode 412 and the first active mirror 410, between the third electrode 414 and the first active mirror 410, and between the fourth electrode 415 and the first active mirror 410. Accordingly, the first active mirror 410 may tilt toward the first electrode 411. When this occurs, the first active mirror 410 becomes closest to the first electrode 411. The first active mirror 410 may contact the first electrode 411. Alternatively, when the second driving voltage is applied to the second electrode 412 and the third electrode 414, they may hinder the first active mirror 410 from tilting toward the first electrode 411. Accordingly, the second electrode 412 and the third electrode 414 may not have a driving voltage applied thereto. That is, the second electrode 412 and the third electrode 414 may float.

[0245] When a first driving voltage is applied to the second electrode 412 and a second driving voltage is applied to the first electrode 411, the third electrode 414, the fourth electrode 415, and the first active mirror 410, an attractive force may act between the second electrode 412 and the first active mirror 410, and a repulsive force may act between the first electrode 411 and the first active mirror 410, between the third electrode 414 and the first active mirror 410, and between the fourth electrode 415 and the first active mirror 410. Accordingly, the first active mirror 410 may tilt toward the second electrode 412. When this occurs, the first active mirror 410 becomes closest to the second electrode 412. The first active mirror 410 may contact the second electrode 412. Alternatively, when the second driving voltage is applied to the first electrode 411 and the fourth electrode 415, they may hinder the first active mirror 410 from tilting toward the second electrode 412. Accordingly, the first electrode 411 and the fourth electrode 415 may not be applied with a driving voltage. That is, the first electrode 411 and the fourth electrode 415 may float.

[0246] When the first driving voltage is applied to the third electrode 414 and the second driving voltage is applied to the first electrode 411, the second electrode 412, the fourth electrode 415, and the first active mirror 410, an attractive force may act between the third electrode 414 and the first active mirror 410, and a repulsive force may act between the first electrode 411 and the first active mirror 410, between the second electrode 412 and the first active mirror 410, and between the fourth electrode 415 and the first active mirror 410. Accordingly, the first active mirror 410 may tilt toward the third electrode 414. When this occurs, the first active mirror 410 becomes closest to the third electrode 414. The first active mirror 410 may contact the third electrode 414. Alternatively, when the second driving voltage is applied to the first electrode 411 and the fourth electrode 415, they may hinder the first active mirror 410 from tilting toward the third electrode 414. Accordingly, the first electrode 411 and the fourth electrode 415 may not be applied with a driving voltage. That is, the first electrode 411 and the fourth electrode 415 may float.

[0247] When the first driving voltage is applied to the fourth electrode 415 and the second driving voltage is applied to the first electrode 411, the second electrode 412, the third electrode 414, and the first active mirror 410, an attractive force may act between the fourth electrode 415 and the first active mirror 410, and a repulsive force may act between the first electrode 411 and the first active mirror 410, between the second electrode 412 and the first active mirror 410, and between the third electrode 414 and the first active mirror 410. Accordingly, the first active mirror 410 may tilt toward the fourth electrode 415. When this occurs, the first active mirror 410 may become closest to the fourth electrode 415. The first active mirror 410 may contact the fourth electrode 415. Alternatively, when the second driving voltage is applied to the second electrode 412 and the third electrode 414, they may hinder the first active mirror 410 from tilting toward the fourth electrode 415. Accordingly, the second electrode 412 and the third electrode 414 may not have a driving voltage applied thereto. That is, the second electrode 412 and the third electrode 414 may float.

[0248] Despite Fig. 20 In the exemplary embodiment shown in , four electrodes are shown, but the number of electrodes for driving the first active mirror 410 is not limited thereto. As the number of electrodes for driving the first active mirror 410 increases, the first active mirror 410 can be tilted more accurately according to the voltage applied to the electrodes. Therefore, the number of electrodes for driving the first active mirror 410 can be appropriately determined as needed.

[0249] according to Fig. 20In the exemplary embodiment shown in , the first active mirror 410 may be tilted toward one of the first electrode 411, the second electrode 412, the third electrode 414, and the fourth electrode 415, depending on the voltage applied to the first electrode 411, the second electrode 412, the third electrode 414, the fourth electrode 415, and the first active mirror 410. That is, the angle at which the first active mirror 410 is tilted can be adjusted by the driving voltage applied to the first electrode 411, the second electrode 412, the third electrode 414, the fourth electrode 415, and the first active mirror 410.

[0250] It should be noted that Fig. 20 In the exemplary embodiment shown in FIG. 1 , the positions of the first lens portion 111, the second lens portion 112, and the groove AG may be as follows: Figure 5B , Figure 5C and Figure 5D The place shown in has been changed.

[0251] The second active mirror 420 may be substantially Fig. 20 , and therefore, the second active mirror 420 will not be described.

[0252] Fig.21 is a flowchart illustrating a method for providing augmented reality by an optical device according to an exemplary embodiment of the present invention. FIG. 22A to FIG. 22D 2 is a view showing an example for illustrating a method of providing augmented reality by an optical device according to an exemplary embodiment of the present invention.

[0253] First, during a first period, a first sub-image of a first image is displayed in a first area A1 of a first display device 210, and a first sub-image of a second image is displayed in a first area of ​​a second display device 220. The first sub-image of the first image is provided to a right eye RE of a user during the first period, and the first sub-image of the second image is provided to a left eye LE of a user during the first period. The first sub-image of the first image may be substantially identical to the first sub-image of the second image.

[0254] In addition, during the first period, the first driving voltage is applied to the first electrode 411, and the second driving voltage is applied to the second electrode 412, the third electrode 414, the fourth electrode 415, and the first active mirror 410, so that the first active mirror 410 can be tilted toward the first electrode 411. In this example, the first electrode 411 is arranged on the upper left side of the mirror support 413, and therefore, the first active mirror 410 can be tilted in the upper left direction. The first active mirror 410 can be tilted so that it reflects the first image in the first area A1 (i.e., the upper left area) of the first display device 210 to allow the image to exit through the exit surface of the first lens 110. As a result, as Fig.22AAs shown in FIG. 1 , during the first period, the first sub-image of the first image in the first area A1 of the first display device 210 may be reflected by the first active mirror 410 and may be emitted through the emission surface of the first lens 110 to be provided to the user's right eye RE. Fig.21 Step S301)

[0255] During the first period, the second active mirror 420 may also be tilted so that it reflects the first sub-image of the second image in the first area (i.e., the upper left area) of the second display device 220 to allow the image to exit through the exit surface of the second lens 120. As a result, during the first period, the first sub-image of the second image in the first area of ​​the second display device 220 may be reflected by the second active mirror 420 and may exit through the exit surface of the second lens 120 to be provided to the left eye LE of the user.

[0256] Secondly, during the second period, the second sub-image of the first image is displayed in the second area A2 of the first display device 210, and the second sub-image of the second image is displayed in the second area of ​​the second display device 220. The second sub-image of the first image is provided to the right eye RE of the user during the second period, and the second sub-image of the second image is provided to the left eye LE of the user during the second period. The second sub-image of the first image may be substantially identical to the second sub-image of the second image.

[0257] In addition, during the second period, the first driving voltage is applied to the second electrode 412, and the second driving voltage is applied to the first electrode 411, the third electrode 414, the fourth electrode 415, and the first active mirror 410, so that the first active mirror 410 can be tilted toward the second electrode 412. In this example, the second electrode 412 is arranged on the upper right of the mirror support 413, and therefore, the first active mirror 410 can be tilted in the upper right direction. The first active mirror 410 can be tilted so that it reflects the second sub-image of the first image in the second area A2 (i.e., the upper right area) of the first display device 210 to allow the image to exit through the exit surface of the first lens 110. As a result, as Fig. 22B As shown in , during the second period, the second sub-image of the first image in the second area A2 of the first display device 210 may be reflected by the first active mirror 410 and may be emitted through the exit surface of the first lens 110 to be provided to the user's right eye RE. Fig.21 Step S302)

[0258] During the second period, the second active mirror 420 may also be tilted so that it reflects the second sub-image of the second image in the second area (i.e., the upper right area) of the second display device 220 to allow the image to exit through the exit surface of the second lens 120. As a result, during the second period, the second sub-image of the second image in the second area of ​​the second display device 220 may be reflected by the second active mirror 420 and may exit through the exit surface of the second lens 120 to be provided to the left eye LE of the user.

[0259] Third, during the third period, the third sub-image of the first image is displayed in the third area A3 of the first display device 210, and the third sub-image of the second image is displayed in the third area of ​​the second display device 220. The third sub-image of the first image is provided to the right eye RE of the user during the third period, and the third sub-image of the second image is provided to the left eye LE of the user during the third period. The third sub-image of the first image may be substantially consistent with the third sub-image of the second image.

[0260] In addition, during the third period, the first driving voltage is applied to the third electrode 414, and the second driving voltage is applied to the first electrode 411, the second electrode 412, the fourth electrode 415, and the first active mirror 410, so that the first active mirror 410 can be tilted toward the third electrode 414. In this example, the third electrode 414 is arranged on the lower left side of the mirror support 413, and therefore, the first active mirror 410 can be tilted in the lower left direction. The first active mirror 410 can be tilted so that it reflects the third sub-image of the first image in the third area A3 (i.e., the lower left area) of the first display device 210 to allow the image to exit through the exit surface of the first lens 110. As a result, as Fig. 22C As shown in , during the third period, the third sub-image of the first image in the third area A3 of the first display device 210 may be reflected by the first active mirror 410 and may be emitted through the exit surface of the first lens 110 to be provided to the user's right eye RE. ( Fig.21 Step S303)

[0261] During the third period, the second active mirror 420 may also be tilted so that it reflects the third sub-image of the second image in the third area (i.e., the lower left area) of the second display device 220 to allow the image to exit through the exit surface of the second lens 120. As a result, during the third period, the third sub-image of the second image in the third area of ​​the second display device 220 may be reflected by the second active mirror 420 and may exit through the exit surface of the second lens 120 to be provided to the left eye LE of the user.

[0262] Fourth, during the fourth period, the fourth sub-image of the first image is displayed in the fourth area A4 of the first display device 210, and the fourth sub-image of the second image is displayed in the fourth area of ​​the second display device 220. The fourth sub-image of the first image is provided to the right eye RE of the user during the fourth period, and the fourth sub-image of the second image is provided to the left eye LE of the user during the fourth period. The fourth sub-image of the first image may be substantially consistent with the fourth sub-image of the second image.

[0263] In addition, during the fourth period, the first driving voltage is applied to the fourth electrode 415, and the second driving voltage is applied to the first electrode 411, the second electrode 412, the third electrode 414, and the first active mirror 410, so that the first active mirror 410 can be tilted toward the fourth electrode 415. In this example, the fourth electrode 415 is arranged on the lower right side of the mirror support 413, and therefore, the first active mirror 410 can be tilted in the lower right direction. The first active mirror 410 can be tilted so that it reflects the fourth sub-image of the first image in the fourth area A4 (i.e., the lower right area) of the first display device 210 to allow the image to be emitted through the exit surface of the first lens 110. As a result, as Fig.22D As shown in FIG. 1 , during the fourth period, the fourth sub-image of the first image in the fourth area A4 of the first display device 210 may be reflected by the first active mirror 410 and may be emitted through the exit surface of the first lens 110 to be provided to the user's right eye RE. ( Fig.21 Step S304)

[0264] During the fourth period, the second active mirror 420 may also be tilted so that it reflects the fourth sub-image of the second image in the fourth area (i.e., the lower right area) of the second display device 220 to allow the image to exit through the exit surface of the second lens 120. As a result, during the fourth period, the fourth sub-image of the second image in the fourth area of ​​the second display device 220 may be reflected by the second active mirror 420 and may exit through the exit surface of the second lens 120 to be provided to the left eye LE of the user.

[0265] according to Fig.21 as well as FIG. 22A to FIG. 22DIn the exemplary embodiment shown in , during the first period, by tilting the active mirror toward the first electrode, the image in the first area of ​​the display device is provided to the user's eyes, and during the second period, by tilting the active mirror toward the second electrode, the image in the second area of ​​the display device is provided to the user's eyes. In addition, during the third period, by tilting the active mirror toward the third electrode, the image in the third area of ​​the display device is provided to the user's eyes, and during the fourth period, by tilting the active mirror toward the fourth electrode, the image in the fourth area of ​​the display device is provided to the user's eyes. That is, the user can observe the image displayed in the first area of ​​the display device as a virtual image during the first period, and observe the image displayed in the second area of ​​the display device as a virtual image during the second period. In addition, the user can observe the image displayed in the third area of ​​the display device as a virtual image during the third period, and observe the image displayed in the fourth area of ​​the display device as a virtual image during the fourth period. Therefore, the portion of the display device observed by the user (i.e., the user's field of view (FOV)) can be expanded without increasing the number of mirrors or even increasing the area of ​​the display device.

[0266] Fig.23 is an exploded perspective view showing an optical device according to an exemplary embodiment of the present disclosure. Fig.24 It is shown Fig.23 A perspective view of an example of a first lens, a first display device, a third display device, a fifth display device, and a seventh display device.

[0267] Fig.23 and Fig.24 The exemplary embodiments shown in Fig.10 and Fig.11 The exemplary embodiment shown in FIG. 1 is different in that the fifth display device 212 is arranged on the left surface of the first lens 110 , and the seventh display device 213 is arranged on the right surface of the first lens 110 . Fig.23 and Fig.24 The exemplary embodiments shown in Fig.10 and Fig.11 The exemplary embodiment shown in FIG. 1 is different in that the sixth display device 222 is arranged on the left surface of the second lens 120, and the eighth display device 223 is arranged on the right surface of the second lens 120. The description will focus on the Fig.10 and Fig.11 The differences between the exemplary embodiments shown in FIG. 1 and FIG. 2 are omitted, and any redundant description will be omitted.

[0268] Reference Fig.23 and Fig.24, each of the fifth display device 212, the sixth display device 222, the seventh display device 213, and the eighth display device 223 displays a virtual image for realizing augmented reality. The fifth display device 212 may display the fifth image as a virtual image, the sixth display device 222 may display the sixth image as a virtual image, the seventh display device 213 may display the seventh image as a virtual image, and the eighth display device 223 may display the eighth image as a virtual image.

[0269] The fifth display device 212 may include a fifth display panel 2121, a fifth circuit board 2122, and a fifth driving circuit 2123. The sixth display device 222 may include a sixth display panel 2221, a sixth circuit board 2222, and a sixth driving circuit 2223. The seventh display device 213 may include a seventh display panel 2131, a seventh circuit board 2132, and a seventh driving circuit 2133. The eighth display device 223 may include an eighth display panel 2231, an eighth circuit board 2232, and an eighth driving circuit 2233.

[0270] The first display panel 2101, the third display panel 2111, the fifth display panel 2121, and the seventh display panel 2131 may be arranged on the side surfaces of the first lens 110, respectively. For example, the first display panel 2101 may be arranged on the upper surface of the first lens 110, and the third display panel 2111 may be arranged on the lower surface of the first lens 110. The fifth display panel 2121 may be arranged on the left surface of the first lens 110, and the seventh display panel 2131 may be arranged on the right surface of the first lens 110. That is, the first display panel 2101 and the third display panel 2111 may face each other, and the fifth display panel 2121 and the seventh display panel 2131 may face each other. The first display panel 2101, the third display panel 2111, the fifth display panel 2121, and the seventh display panel 2131 may be covered by the top bar 20 and the first lens frame 21.

[0271] The second display panel 2201, the fourth display panel 2211, the sixth display panel 2221, and the eighth display panel 2231 may be arranged on the side surfaces of the second lens 120, respectively. For example, the second display panel 2201 may be arranged on the upper surface of the second lens 120, and the fourth display panel 2211 may be arranged on the lower surface of the second lens 120. The sixth display panel 2221 may be arranged on the left surface of the second lens 120, and the eighth display panel 2231 may be arranged on the right surface of the second lens 120. That is, the second display panel 2201 and the fourth display panel 2211 may face each other, and the sixth display panel 2221 and the eighth display panel 2231 may face each other. The second display panel 2201, the fourth display panel 2211, the sixth display panel 2221, and the eighth display panel 2231 may be covered by the top bar 20 and the second lens frame 22.

[0272] Each of the fifth display panel 2121, the sixth display panel 2221, the seventh display panel 2131, and the eighth display panel 2231 may be a flexible display panel that can be bent, rolled, or curved. For example, each of the fifth display panel 2121, the sixth display panel 2221, the seventh display panel 2131, and the eighth display panel 2231 may be an organic light emitting display panel or an organic light emitting display panel including quantum dots. Each of the fifth display panel 2121, the sixth display panel 2221, the seventh display panel 2131, and the eighth display panel 2231 may be connected to Figure 4 The first display panel 2101 shown in FIG. 2 is formed in substantially the same manner, and thus, a redundant description will be omitted.

[0273] although Fig.23 and Fig.24 The first display panel 2101, the third display panel 2111, the fifth display panel 2121, and the seventh display panel 2131 are not connected to each other but are formed separately, but the inventive concept is not limited thereto. That is, the first display panel 2101, the third display panel 2111, the fifth display panel 2121, and the seventh display panel 2131 may be connected to each other as a single piece. In addition, although Fig.23 and Fig.24 It is shown that the second display panel 2201, the fourth display panel 2211, the sixth display panel 2221 and the eighth display panel 2231 are not connected to each other but are formed separately, but the second display panel 2201, the fourth display panel 2211, the sixth display panel 2221 and the eighth display panel 2231 may be connected to each other as a single piece.

[0274] Fig.25 It is shown Fig.24 An exploded perspective view of an example of a first lens.

[0275] Fig.25 The exemplary embodiments shown in Fig.12 The exemplary embodiment shown in FIG. 1 is different in that a fourth driving line DL4 and a fifth driving line DL5 are additionally arranged on the second lens portion 112. The description will focus on the difference, and any redundant description will be omitted.

[0276] Reference Fig.25 A mirror support 413 connected to the first active mirror 410 to support the first active mirror 410, a first electrode 411 for driving the first active mirror 410, a second electrode 412, a third electrode 414 and a fourth electrode 415 may be formed on the bottom of the groove AG.

[0277] The first electrode 411, the second electrode 412, and the mirror support 413 may be arranged in parallel in the second direction (y-axis direction), that is, the height direction of the first lens 110. The mirror support 413 may be arranged between the first electrode 411 and the second electrode 412 in the second direction (y-axis direction). The third electrode 414, the fourth electrode 415, and the mirror support 413 may be arranged in parallel in the first direction (x-axis direction), that is, the width direction of the first lens 110. The mirror support 413 may be arranged between the third electrode 414 and the fourth electrode 415 in the first direction (x-axis direction).

[0278] A first driving line DL1 connected to the first electrode 411, a second driving line DL2 connected to the second electrode 412, a third driving line DL3 connected to the mirror support 413, a fourth driving line DL4 connected to the third electrode 414, and a fifth driving line DL5 connected to the fourth electrode 415 may be formed on the second lens portion 112. A driving voltage may be applied to each of the first driving line DL1, the second driving line DL2, the third driving line DL3, the fourth driving line DL4, and the fifth driving line DL5.

[0279] The first driving line DL1 may be connected to the first electrode 411 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the top surface of the second lens portion 112, and the left surface of the second lens portion 112. The second driving line DL2 may be connected to the second electrode 412 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the top surface of the second lens portion 112, and the left surface of the second lens portion 112. The third driving line DL3 may be connected to the mirror support 413 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the top surface of the second lens portion 112, and the left surface of the second lens portion 112. The fourth driving line DL4 may be connected to the third electrode 414 on the bottom of the groove AG, and may be arranged on at least one of the side walls of the groove AG, the top surface of the second lens portion 112, and the left surface of the second lens portion 112. The fifth driving line DL5 may be connected to the fourth electrode 415 on the bottom of the groove AG, and may be arranged on at least one of the sidewalls of the groove AG, the top surface of the second lens portion 112, and the left surface of the second lens portion 112. Alternatively, the first driving line DL1, the second driving line DL2, the third driving line DL3, the fourth driving line DL4, and the fifth driving line DL5 may be arranged on the right surface of the second lens portion 112 instead of the left surface of the second lens portion 112. Alternatively, some of the first driving line DL1, the second driving line DL2, the third driving line DL3, the fourth driving line DL4, and the fifth driving line DL5 may be arranged on the left surface, and the others may be arranged on the right surface.

[0280] Each of the first drive line DL1, the second drive line DL2, the third drive line DL3, the fourth drive line DL4, and the fifth drive line DL5 may be connected to a third cable or sheathed wire. The third cable or sheathed wire may be connected to a power source incorporated into the first temple 31 or the second temple 32 to apply power to the first display device 210 and the second display device 220. Alternatively, the third cable or sheathed wire may be connected to the first circuit board 2102. The third cable or sheathed wire may be covered by the top bar 20 and the first lens frame 21.

[0281] The first electrode 411, the second electrode 412, the third electrode 414, the fourth electrode 415, the mirror support 413, the first drive line DL1, the second drive line DL2, the third drive line DL3, the fourth drive line DL4 and the fifth drive line DL5 may be made of a transparent conductive material such as a transparent conductive oxide. Accordingly, it is possible to prevent light from the first display device 210 from being reflected or interfered by the first electrode 411, the second electrode 412, the third electrode 414, the fourth electrode 415, the mirror support 413, the first drive line DL1, the second drive line DL2, the third drive line DL3, the fourth drive line DL4 and the fifth drive line DL5. One of the bottom surfaces of the first active mirror 410 may be connected to the mirror support 413, and a metal with high reflectivity (such as silver (Ag)) may be formed on the other of the bottom surfaces of the first active mirror 410.

[0282] Fig.25 The exemplary embodiments shown in Fig. 20 , except that the third electrode 414, the fourth electrode 415, and the mirror support 413 are arranged in parallel in the first direction (x-axis direction), ie, the width direction of the first lens 110. Therefore, any redundant description will be omitted.

[0283] The second active mirror 420 can be connected with Fig.25 Therefore, the second active mirror 420 will not be described.

[0284] Fig.26 is a flowchart illustrating a method for providing augmented reality by an optical device according to an exemplary embodiment of the present invention. FIG. 27A to FIG. 27D 2 is a view showing an example for illustrating a method of providing augmented reality by an optical device according to an exemplary embodiment of the present invention.

[0285] First, during a first period, the first display device 210 displays a first image, and the second display device 220 displays a second image. The first image is provided to the user's right eye RE during the first period, and the second image is provided to the user's left eye LE during the first period. The first image may be substantially consistent with the second image.

[0286] In addition, during the first period, the first driving voltage is applied to the first electrode 411, and the second driving voltage is applied to the second electrode 412, the third electrode 414, the fourth electrode 415, and the first active mirror 410, so that the first active mirror 410 can be tilted toward the first electrode 411. In this example, the first electrode 411 is arranged on the upper side of the mirror support 413, and thus, the first active mirror 410 can be tilted in an upward direction. The first active mirror 410 can be tilted so that it reflects the first image of the first display device 210 to allow the image to exit through the exit surface of the first lens 110. As a result, as shown in FIG. Fig.27A As shown in , during the first period, the first image of the first display device 210 may be reflected by the first active mirror 410 and may be emitted through the exit surface of the first lens 110 to be provided to the user's right eye RE. Fig.26 Step S401)

[0287] During the first period, the second active mirror 420 may also be tilted so that it reflects the second image of the second display device 220 to allow the image to exit through the exit surface of the second lens 120. As a result, during the first period, the second image of the second display device 220 may be reflected by the second active mirror 420 and may exit through the exit surface of the second lens 120 to be provided to the left eye LE of the user.

[0288] Secondly, during the second period, the third display device 211 displays the third image, and the fourth display device 221 displays the fourth image. The third image is provided to the user's right eye RE during the second period, and the fourth image is provided to the user's left eye LE during the second period. The third image may be substantially consistent with the fourth image.

[0289] In addition, during the second period, the first driving voltage is applied to the second electrode 412, and the second driving voltage is applied to the first electrode 411, the third electrode 414, the fourth electrode 415, and the first active mirror 410, so that the first active mirror 410 can be tilted toward the second electrode 412. In this example, the second electrode 412 is arranged on the lower side of the mirror support 413, and therefore, the first active mirror 410 can be tilted in a downward direction. The first active mirror 410 can be tilted so that it reflects the third image of the third display device 211 to allow the image to exit through the exit surface of the first lens 110. As a result, as shown in FIG. Fig.27B As shown in , during the second period, the third image of the third display device 211 may be reflected by the first active mirror 410 and may be emitted through the exit surface of the first lens 110 to be provided to the user's right eye RE. Fig.26 Step S402)

[0290] During the second period, the second active mirror 420 may also be tilted so that it reflects the fourth image of the fourth display device 221 to allow the image to exit through the exit surface of the second lens 120. As a result, during the second period, the fourth image of the fourth display device 221 may be reflected by the second active mirror 420 and may exit through the exit surface of the second lens 120 to be provided to the left eye LE of the user.

[0291] Third, during the third period, the fifth display device 212 displays the fifth image, and the sixth display device 222 displays the sixth image. The fifth image is provided to the user's right eye RE during the third period, and the sixth image is provided to the user's left eye LE during the third period. The fifth image may be substantially consistent with the sixth image.

[0292] In addition, during the third period, the first driving voltage is applied to the third electrode 414, and the second driving voltage is applied to the first electrode 411, the second electrode 412, the fourth electrode 415, and the first active mirror 410, so that the first active mirror 410 can be tilted toward the third electrode 414. In this example, the third electrode 414 is arranged on the left side of the mirror support 413, and therefore, the first active mirror 410 can be tilted in the left direction. The first active mirror 410 can be tilted so that it reflects the fifth image of the fifth display device 212 to allow the image to be emitted through the exit surface of the first lens 110. As a result, as shown in FIG. Fig.27C As shown in , during the third period, the fifth image of the fifth display device 212 may be reflected by the first active mirror 410 and may be emitted through the exit surface of the first lens 110 to be provided to the user's right eye RE. Fig.26 Step S403)

[0293] During the third period, the second active mirror 420 may also be tilted so that it reflects the sixth image of the sixth display device 222 to allow the image to exit through the exit surface of the second lens 120. As a result, during the third period, the sixth image of the sixth display device 222 may be reflected by the second active mirror 420 and may exit through the exit surface of the second lens 120 to be provided to the left eye LE of the user.

[0294] Fourth, during the fourth period, the seventh display device 213 displays the seventh image, and the eighth display device 223 displays the eighth image. The seventh image is provided to the user's right eye RE during the fourth period, and the eighth image is provided to the user's left eye LE during the fourth period. The seventh image may be substantially consistent with the eighth image.

[0295] In addition, during the fourth period, the first driving voltage is applied to the fourth electrode 415, and the second driving voltage is applied to the first electrode 411, the second electrode 412, the third electrode 414, and the first active mirror 410, so that the first active mirror 410 can be tilted toward the fourth electrode 415. In this example, the fourth electrode 415 is arranged on the right side of the mirror support 413, and therefore, the first active mirror 410 can be tilted in the right direction. The first active mirror 410 can be tilted so that it reflects the seventh image of the seventh display device 213 to allow the image to be emitted through the exit surface of the first lens 110. As a result, as Fig.27D As shown in , during the fourth period, the seventh image of the seventh display device 213 may be reflected by the first active mirror 410 and may be emitted through the exit surface of the first lens 110 to be provided to the user's right eye RE. Fig.26 Step S404)

[0296] During the fourth period, the second active mirror 420 may also be tilted so that it reflects the eighth image of the eighth display device 223 to allow the image to exit through the exit surface of the second lens 120. As a result, during the fourth period, the eighth image of the eighth display device 223 may be reflected by the second active mirror 420 and may exit through the exit surface of the second lens 120 to be provided to the left eye LE of the user.

[0297] according to Fig.26 as well as FIG. 27A to FIG. 27D In the exemplary embodiment shown in , during the first period, by tilting the active mirror toward the first electrode, the image of the display device arranged on the upper surface of the lens can be provided to the user's eyes, and during the second period, by tilting the active mirror toward the second electrode, the image of the display device arranged on the lower surface of the lens can be provided to the user's eyes. In addition, during the third period, by tilting the active mirror toward the third electrode, the image of the display device arranged on the left surface of the lens can be provided to the user's eyes, and during the fourth period, by tilting the active mirror toward the fourth electrode, the image of the display device arranged on the right surface of the lens can be provided to the user's eyes. That is, the user can observe the image displayed on the display device arranged on the upper surface of the lens as a virtual image during the first period, and observe the image displayed on the display device arranged on the lower surface of the lens as a virtual image during the second period. In addition, the user can observe the image displayed on the display device arranged on the left surface of the lens as a virtual image during the third period, and observe the image displayed on the display device arranged on the right surface of the lens as a virtual image during the fourth period. Therefore, the portion of the display device observed by the user (ie, the user's field of view (FOV)) can be expanded without increasing the number of mirrors or even increasing the area of ​​the display device.

[0298] Although certain exemplary embodiments have been described herein, other embodiments and variations will be apparent from this description. Accordingly, it will be apparent to those skilled in the art that the inventive concept is not limited to these embodiments, but to the broader scope of the appended claims and various obvious variations and equivalent arrangements.

Claims

1. An optical device for head mounted display, comprising: a first lens having a first surface and a plurality of side surfaces; a first display device, the first display device being arranged on a first side surface of the plurality of side surfaces of the first lens; as well as a first active mirror, the first active mirror being arranged in the first lens, wherein the first active mirror is tilted at a first angle during a first period and tilted at a second angle during a second period, Wherein, the first lens comprises: a first lens portion; and a second lens portion having a groove formed in a side surface thereof facing a side surface of the first lens portion, and Wherein, the first active mirror is accommodated in the groove.

2. The optical device for head mounted display according to claim 1, wherein: Each of the first angle and the second angle is measured from a thickness direction of the first lens toward a height direction of the first lens.

3. The optical device for head mounted display according to claim 1, wherein: The groove is filled with a fluid.

4. The optical device for head mounted display according to claim 1, further comprising: a first electrode and a second electrode, wherein the first electrode and the second electrode are arranged on the bottom of the groove; as well as A mirror support is arranged on the bottom of the groove to support the first active mirror.

5. The optical device for head mounted display according to claim 4, wherein: The bottom of the groove is inclined at a third angle; and The third angle is measured from a thickness direction of the first lens toward a height direction of the first lens.

6. The optical device for head mounted display according to claim 4, wherein: The first electrode, the second electrode and the mirror support are made of a transparent conductive material.

7. The optical device for head mounted display according to claim 4, wherein: During the first period, a first driving voltage is applied to the first electrode and a second driving voltage is applied to the second electrode and the first active mirror so that the first active mirror tilts toward the first electrode.

8. The optical device for head mounted display according to claim 7, wherein: During the second period, the first driving voltage is applied to the second electrode and the second driving voltage is applied to the first electrode and the first active mirror so that the first active mirror tilts toward the second electrode.

9. The optical device for head mounted display according to claim 8, wherein: The first display device displays a first image during the first period, and displays a second image during the second period.

10. The optical device for head mounted display according to claim 1, wherein: The first active mirror reflects an image displayed on a first area of ​​the first display device toward the first surface during the first period, and reflects an image displayed on a second area of ​​the first display device toward the first surface during the second period.

11. The optical device for head mounted display according to claim 10, wherein: The first active mirror reflects an image displayed on a third area of ​​the first display device toward the first surface during a third period, and reflects an image displayed on a fourth area of ​​the first display device toward the first surface during a fourth period.

12. The optical device for head mounted display according to claim 11, further comprising: a first electrode, a second electrode, a third electrode and a fourth electrode, wherein the first electrode, the second electrode, the third electrode and the fourth electrode are arranged on the bottom of the groove; as well as A mirror support is arranged on the bottom of the groove to support the first active mirror.

13. The optical device for head mounted display according to claim 12, wherein: During the first period, a first driving voltage is applied to the first electrode and a second driving voltage is applied to the second electrode, the third electrode, the fourth electrode, and the first active mirror so that the first active mirror tilts toward the first electrode.

14. The optical device for head mounted display according to claim 13, wherein: During the second period, the first driving voltage is applied to the second electrode and the second driving voltage is applied to the first electrode, the third electrode, the fourth electrode, and the first active mirror so that the first active mirror tilts toward the second electrode.

15. The optical device for head mounted display according to claim 14, wherein: During a third period, the first driving voltage is applied to the third electrode and the second driving voltage is applied to the first electrode, the second electrode, the fourth electrode, and the first active mirror so that the first active mirror is tilted toward the third electrode.

16. The optical device for head mounted display according to claim 15, wherein: During a fourth period, the first driving voltage is applied to the fourth electrode and the second driving voltage is applied to the first electrode, the second electrode, the third electrode, and the first active mirror so that the first active mirror is tilted toward the fourth electrode.

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