Patent Publication Number: US-2022229296-A1

Title: Augmented reality lenses, and augmented reality glasses and augmented reality system including the same

Description:
CROSS-REFERENCE TO THE RELATED APPLICATION 
     Korean Patent Application No. 10-2021-0008006, filed on Jan. 20, 2021, in the Korean Intellectual Property Office, and entitled: “Augmented Reality Glasses Lenses, and Augmented Reality Glasses and Augmented Reality System Including the Same,” is incorporated by reference herein in its entirety. 
     BACKGROUND 
     1. Field 
     Exemplary embodiments relate to augmented reality lenses, and augmented reality glasses and an augmented reality system including the same. 
     2. Description of the Related Art 
     In accordance with recent technological advances, wearable devices of various types that are wearable on the body of a user are commercially available. For example, such wearable devices may include a head-mounted display, which is a wearable device wearable on a head of a user. The head-mounted display may provide visual information as to a virtual object through a transparent display and, as such, may provide augmented reality services to the user. 
     SUMMARY 
     According to an aspect of the present disclosure, there are provided augmented reality glasses. The augmented reality glasses include a left eye lens part and a right eye lens part; and a frame including a left eye lens support area supporting the left eye lens part, a right eye lens support area supporting the right eye lens part, and a nose bridge interconnecting the left lens support area and the right lens support area, wherein each of the left eye lens part and the right eye lens part includes a display area to display an augmented reality image, and a tracking area in which a plurality of light emission parts to emit light having a wavelength in an infrared band is disposed, the tracking area surrounding the display area. 
     According to an aspect of the present disclosure, there is provided an augmented reality system. The augmented reality system includes a control appliance including a communication module, and a control part; and augmented reality glasses connected to the communication module through a communication network, to display an augmented reality image and to track positions of pupils of a user under a control of the control part, wherein the augmented reality glasses includes a left eye lens part and a right eye lens part, and a frame including a left eye lens support area supporting the left eye lens part, a right eye lens support area supporting the right eye lens part, and a nose bridge interconnecting the left lens support area and the right lens support area, wherein each of the left eye lens part and the right eye lens part includes a display area to display an augmented reality image, and a tracking area in which a plurality of light emission parts to emit light having a wavelength in an infrared band is disposed, the tracking area surrounding the display area, wherein each of the light emission parts includes a base substrate, a light emitting chip disposed on the base substrate, a first pad and a second pad which are disposed on the light emitting chip while being formed at the same layer, and a filling member formed to cover the light emitting chip. 
     According to an aspect of the present disclosure, there are provided augmented reality glasses configured to enable a user to visually recognize an object in front of the augmented reality glasses and configured to display an augmented reality image. The augmented reality glasses includes: a first optical lens; a second optical lens including a recess area at one surface thereof; a waveguide disposed between the first optical lens and the second optical lens; and a light emission part disposed between the waveguide and the second optical lens while being positioned in the recess area, wherein the light emission part includes a base substrate including GaAs, a light emitting chip disposed on the base substrate, the light emitting chip being of an epitaxial growth type, a first pad and a second pad which are disposed on the light emitting chip, and a filling member disposed on the light emitting chip, wherein the filling member includes a resin while being formed to cover the light emitting chip and to fill the recess area. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Features will become apparent to those of skill in the art by describing in detail exemplary embodiments with reference to the attached drawings, in which: 
         FIG. 1  is a schematic diagram of an augmented reality system according to an exemplary embodiment of the disclosure. 
         FIG. 2  is a schematic block diagram of the augmented reality system according to the exemplary embodiment of the disclosure. 
         FIG. 3  is a schematic block diagram of a display part of augmented reality glasses according to an exemplary embodiment of the disclosure. 
         FIG. 4  is a schematic block diagram of an eye tracking part of augmented reality glasses according to an exemplary embodiment of the disclosure. 
         FIG. 5  is a diagram of a method in which the eye tracking part of  FIG. 4  adjusts a focal point. 
         FIG. 6  is a diagram of a method in which the eye tracking part of  FIG. 4  tracks sight. 
         FIG. 7  is a schematic perspective view of augmented reality glasses according to an exemplary embodiment of the disclosure. 
         FIG. 8  is a cross-sectional view along line I-I′ in  FIG. 7 . 
         FIG. 9  is an enlarged view of portion A in  FIG. 7 . 
         FIG. 10  is a cross-sectional view along line II-IF in  FIG. 9 . 
         FIG. 11  is a cross-sectional view of augmented reality glasses according to an exemplary embodiment of the disclosure. 
         FIG. 12  is a cross-sectional view of augmented reality glasses according to an exemplary embodiment of the disclosure. 
         FIG. 13  is a schematic perspective view of augmented reality glasses according to an exemplary embodiment of the disclosure. 
         FIG. 14  is a cross-sectional view along line in  FIG. 13 . 
         FIG. 15  is an enlarged view of portion A in  FIG. 13 . 
         FIG. 16  is a cross-sectional view along line VI-VI′ in  FIG. 15 . 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, embodiments will be described with reference to the accompanying drawings. Like reference numerals refer to like elements throughout the specification. 
       FIG. 1  is a conceptual diagram schematically showing an augmented reality system according to an exemplary embodiment of the disclosure.  FIG. 2  is a schematic block diagram explaining the augmented reality system in  FIG. 1 . 
     First, functional characteristics of augmented reality glasses  20  will be described. 
     Referring to  FIGS. 1 and 2 , the augmented reality (AR) system may include augmented reality glasses  20 , a control appliance  30 , and a communication network  40 . 
     The augmented reality glasses  20  may be wearable on the head of a user  10 . The augmented reality glasses  20  may be wearable adjacent to eyes  11  of the user  10 . Similarly to the case in which the user  10  wears general glasses, the user  10  may visually recognize a real, e.g., physical, background in front of the augmented reality glasses  20 , and may receive various display information for execution of a task through the augmented reality glasses  20 . The augmented reality glasses  20  may display an augmented reality image, i.e., a virtual image, as the various display information. The augmented reality glasses  20  may display the augmented reality image in an area according to a sight direction of the user  10  (a sight area). The augmented reality image is projected onto augmented reality lenses (e.g., a lens part to be described later). To this end, the augmented reality glasses  20  may include a display panel to display the augmented reality image. The augmented reality lenses may have transmittance for light having wavelengths in the visible spectrum. The user  10  may visually recognize both an augmented reality image displayed by the augmented reality glasses  20  and a background (a real object) in front of the augmented reality glasses  20  in a state in which the augmented reality image and the background are overlapped with each other. 
     Operation control of the augmented reality glasses  20  may be performed on the basis of the sight direction of the user  10 . The augmented reality glasses  20  may determine the sight direction of the user  10 , and may display information based on results of the determination. 
     In an embodiment, the augmented reality glasses  20  may be controlled by the control appliance  30 , to which the augmented reality glasses  20  are connected via the communication network  40 . In an embodiment, the control appliance  30  may include a first communication module  320  configured to be connected to the communication network  40 , and a control part  310  to control the augmented reality glasses  20 . 
     The first communication module  320  included in the control appliance  30  may include a wireless communication module supporting various wireless communication systems, e.g., a Bluetooth module, an infrared communication module, a radio frequency identification (RFID) communication module, a wireless local access network (WLAN) communication module, a near-field communication (NFC) communication module, a Zigbee communication module, a Wi-Fi communication module, a wireless broadband module, a global system for a mobile communication (GSM) module, a code division multiple access (CDMA) module, a wideband code division multiple access (WCDMA) module, a universal mobile telecommunications system (UMTS) module, a time division multiple access (TDMA) module, a long term evolution (LTE) module, a 5G module, etc. 
     The control part  310  may include hardware and software to execute image processing. For example, the hardware may be embodied in the form of a central processing unit (CPU), a graphics processing unit (GPU), and/or a dedicated processor to execute methods according to exemplary embodiments of the disclosure. 
     For example, the control appliance  30  may be a wireless appliance able to perform wireless communication, and may be embodied in the form of, e.g., a smartphone, a tablet personal computer (PC), a mobile phone, a smart watch, smart glasses, an e-book reader, a portable game console, a navigation device, a personal digital assistant (PDA), etc. 
     In an embodiment, the augmented reality glasses  20  may include a display part  210 , an eye tracking part  220 , and a second communication module  230 . The display part  210  and the eye tracking part  220  will be described in detail with reference to  FIGS. 3 and 4-6 , respectively. 
     Referring to  FIG. 2 , the second communication module  230  included in the augmented reality glasses  20  may communicate with the control appliance  30 . For example, the second communication module  230  included in the augmented reality glasses  20  may include a wireless communication module supporting the same wireless communication system as the first communication module  320 , in order to communicate with the first communication module  320 . 
     The display part  210  of the augmented reality glasses  20  displays an image to the user  10 , as will be described in detail with reference to  FIG. 3 .  FIG. 3  is a schematic block diagram of the display part  210  in the augmented reality glasses  20 . 
     Referring to  FIG. 3 , the display part  210  may include a pixel part  214 , a timing controller  211 , a scan driver  213 , a data driver  212 , an optical element  215 , and a waveguide  240 . 
     An augmented reality image means a virtual image output from the pixel part  214  and transferred to the pupils of the user  10  via the optical element  215  and the waveguide  240 . The augmented reality image may be a still picture or a moving picture in the form of an image. The user  10  may receive augmented reality services by directly gazing, i.e., via the eyes, on real object image light, which is image light emitted through the display part  210  from a real, e.g., physical, object present in the real world. 
     The pixel part  214  emits image light corresponding to an augmented reality image. The pixel part  214  may include a plurality of pixels, e.g., pixels PX 1  to PX 4 . The pixel part  214  may include a plurality of pixels, e.g., pixels PX 1  to PX 4 , respectively disposed in areas defined by scan lines SL 1  to SLn (n being a natural number greater than 1) and data lines DL 1  to DLm (m being a natural number greater than 1). For example, the plurality of pixels may include pixels PX 1  to PX 4  respectively emitting image light of red, green and blue. In some embodiments, the plurality of pixels may include pixels PX 1  to PX 4  respectively emitting image light of white, cyan, magenta and yellow. 
     The timing controller  211  may provide data values, a control signal, etc. for each frame to the data driver  212 , based on data received from the control part  310 . In addition, the timing controller  211  may provide a clock signal, a control signal, etc. to the scan driver  213 , based on data received from the control part  310 . The timing controller  211  disposed in the augmented reality glasses  20  may be controlled by the control part  310  disposed in the control appliance  30 . For example, the control part  310  disposed at the control appliance  30  may control the timing controller  211  through wireless connection thereof to the augmented reality glasses  20 . 
     The scan driver  213  may sequentially supply scan signals S 1  to Sn to the scan lines SL 1  to SLn. The data driver  212  may supply data signals D 1  to Dm to the data lines DL 1  to DLm every time the scan signals S 1  to Sn are supplied. 
     For example, the pixel part  214 , the scan driver  213 , and the data driver  212  may be embodied together as a display panel in the form of a liquid crystal on silicon (LCOS) display panel, a liquid crystal display panel, an organic light emitting diode (OLED) display panel, a micro LED display panel, a plasma display panel, an electrophoretic display panel, a micro-electromechanical system (MEMS) display panel, an electrowetting display panel, an image projector, or the like. 
     The optical element  215  may reflect, refract, or diffract image light output from the pixel part  214 , and may transfer the resultant image light to the waveguide  240 . The optical element  215  may use various optical elements constituted by a reflection device, a refraction device, a diffraction device, or a combination thereof. For example, the optical element  215  may include a convex or concave lens, a mirror, or the like. For example, in accordance with embodiments, the display part  210  may further include a collimator between the pixel part  214  and the optical element  215 . 
     Image light output from the optical element  215  may be transferred to the waveguide  240 . In an embodiment, the waveguide  240  may employ a configuration in which total reflection is carried out at least one time at an inner surface of the waveguide  240 . In some embodiments, when the waveguide  240  does not employ a total reflection structure, the waveguide  240  may include a separate reflection means, and may be disposed at an appropriate position for transfer of image light to the eyes  11  (pupils). 
     The waveguide  240  is an element made of a transparent material, e.g., a see-through material. The waveguide  240  may include a plurality of areas formed with diffraction gratings. A virtual image projected into the waveguide  240  may be reflected in the waveguide  240  in accordance with a total reflection principle. Image light projected from the pixel part  214  into the waveguide  240  changes its optical path by the refraction gratings formed at the plurality of areas of the waveguide  240  and, as such, may output a virtual object to the eyes  11  of the user  10 . The waveguide  240  may function as a light guide plate to change an optical path of the image light. 
       FIG. 4  is a schematic block diagram of the eye tracking part  220  of the augmented reality glasses  20 .  FIG. 5  is a diagram of a method in which the eye tracking part  220  adjusts a focal point, and  FIG. 6  is a diagram of a method in which the eye tracking part  220  tracks sight. 
     Referring to  FIG. 2  and  FIGS. 4 to 6 , the augmented reality glasses  20  may attain sight vectors respectively representing sight directions of the user  10  by tracking positions of pupils in the eyes  11  of the user  10 . For example, the augmented reality glasses  20  may attain the sight vectors of the user  10  through technology for detecting a sight direction using reflection of infrared light from a cornea. 
     In an embodiment, the eye tracking part  220  may include a light emission part  250  and a light receiving part  260 . In an embodiment, the light emission part  250  may irradiate cornea portions of the eyes  11  (left and right eyes; both eyes) of the user  10  with infrared light, whereas the light receiving part  260  may detect the infrared light reflected from the cornea portions. 
     In detail, the eye tracking part  220  may determine sight directions, in which both eyes of the user  10  gaze, respectively, based on amounts of infrared light detected through the light receiving part  260  and, as such, may attain sight vectors respectively representing the sight directions. The eye tracking part  220  may transmit the attained sight vectors to the control part  310 . The control part  310  may attain respective sight vectors of the left and right eyes, and may estimate a position of a gaze point at which the user  10  gazes through both eyes, based on the attained sight vectors. In an embodiment, the control part  310  may calculate three-dimensional position coordinate values of the gaze point based on the sight vectors. In an embodiment, the control part  310  may determine positions of focal points of the left and right eyes based on the three-dimensional position coordinate values of the gaze point. 
     In an embodiment, the light receiving part  260  may be embodied in the form of an image sensor, e.g., an infrared camera. The light receiving part  260  may attain a video and a still image by photographing a physical environment or space. The light receiving part  260  may transmit the attained video data and the attained still image to the control part  310 . The light receiving part  260  may attain a pupil image based on an amount of infrared light. For example, the eye tracking part  220  may attain images of the pupils using vision technology, may track a variation in positions of the pupils based on the attained images, and may attain sight vectors based on the tracked position variation. 
     Hereinafter, structural characteristics of the augmented reality glasses  20  will be described. In the description of the structural characteristics of the augmented reality glasses  20 , elements having the same functions as the elements previously described in conjunction with the functional characteristics of the augmented reality glasses  20  are designated by the same names or the same reference numerals. 
       FIG. 7  is a schematic perspective view of the augmented reality glasses  20  according to an exemplary embodiment.  FIG. 8  is a cross-sectional view of the augmented reality glasses  20  along line I-I′ in  FIG. 7 . 
     Referring to  FIGS. 7 and 8 , in an embodiment, the augmented reality glasses  20  may include a left eye lens part  291 , a right eye lens part  292 , a frame  270 , a light emission part  250 , and a light receiving part  260 . In addition, the timing controller  211 , the data driver  212 , the scan driver  213 , the pixel part  214 , and the optical element  215  described above with reference to  FIG. 3  may be disposed in an interior of the frame  270 , e.g., interior of the sides of the frame in  FIG. 7  indicated as  211 ˜ 215 . 
     The left eye lens part  291  and the right eye lens part  292  have symmetrical shapes, respectively, and, as such, the following description will be given with reference to the right eye lens part  292 . The structures of the left eye lens part  291  and the right eye lens part  292  are substantially the same, and therefore, overlapping descriptions of the left eye lens part  291  and the right eye lens part  292  will be omitted. In the following description, the left eye lens part  291  and the right eye lens part  292  will be collectively referred to as a “lens part  291 / 292 ”. 
     At least a portion of the entire area of the lens part  291 / 292  may be transparent. The user  10  may visually recognize an object in front of the lens part  291 / 292  through the area portion. The lens part  291 / 292  may have transmittance for light having wavelengths in the visible spectrum. 
     The lens part  291 / 292  may include a display area DA for displaying an augmented reality image, and a tracking area TA at which a plurality of light emission parts  250  is disposed. In accordance with embodiments, the tracking area TA may be a non-display area in which no augmented reality image is displayed. 
     The tracking area TA may be disposed at an edge of the lens part  291 / 292 . The tracking area TA may surround the, e.g., entire perimeter of the, display area DA. In an embodiment, a width w 1  of the tracking area TA extending inward from the edge of the lens part  291 / 292  may be about 2 mm or less, e.g., the tracking area TA may have a constant width measured radially between an outer edge of the display area DA and an outer edge of the lens part  291 / 292 . The display area DA may be disposed inside the tracking area TA, e.g., the display area DA may be centered in and completely surrounded by the tracking area TA. 
     In an embodiment, the lens part  291 / 292  may include the waveguide  240 , a first optical lens  281  disposed at a front surface of the waveguide  240 , and a second optical lens  282  disposed at a back surface of the waveguide  240 . In the specification, for convenience of description of the lens part  291 / 292 , it is assumed that, in an element having opposite surfaces, the surface of the element disposed in a sight direction of the user  10  when the user  10  wears the augmented reality glasses  20  is defined as a front surface, and the surface of the element disposed in a direction opposite to the sight direction (i.e., to face the eyes  11 ) is defined as a back surface. 
     For example, as illustrated in  FIG. 8 , a front surface of the first optical lens  281  may be a curved surface, e.g., a convex surface relative to the waveguide  240 , and a back surface of the first optical lens  281 , which is a surface contacting the front surface of the waveguide  240 , may be a flat surface. In another example, the front surface of the first optical lens  281  may be a flat surface. In an embodiment, when the user  10  wears the augmented reality glasses  20 , the second optical lens  282  may be disposed nearer to the eyes  11  of the user  10  than the first optical lens  281 , e.g., a distance between the second optical lens  282  and the eyes  11  of the user  10  may be smaller than a distance between the first optical lens  281  and the eyes  11  of the user  10 . 
     For example, a front surface of the second optical lens  282 , which is a surface contacting the back surface of the waveguide  240 , may be a flat surface, and a back surface of the second optical lens  282  may be a curved surface, e.g., a convex surface relative to the waveguide  240 . In another example, the back surface of the second optical lens  282  may be a flat surface. 
     The second optical lens  282  may include, at an edge of the front surface thereof, a recess area RA in which a light emission part  250  is disposed. For example, as illustrated in  FIG. 8 , the recess area RA may extend only partially into the second optical lens  282 , e.g., a thickness of the recess area RA as measured in the sight direction may be smaller than a distance between the front and back surfaces of the second optical lens  282  in the tracking area TA. For example, as further illustrated in  FIG. 8 , the recess area RA may extend to an outermost edge of the second optical lens  282 . The recess area RA may be disposed between the second optical lens  282  and the waveguide  240 . For example, referring to  FIGS. 7 and 8 , the recess area RA may extend, e.g., continuously, along an entire outer edge of the second optical lens  282 , such that the recess area RA may be positioned between an edge of the waveguide  240  and an edge of the second optical lens  282  to overlap the edges of the waveguide  240  and the second optical lens  282  in the tracking area TA. The recess area RA may overlap with the tracking area TA, e.g., the recess area RA and the tracking area TA may completely overlap each other along the sight direction. The recess area RA of the front surface of the second optical lens  282  may contact the light emission part  250 , whereas the remaining area of the front surface of the second optical lens  282  (e.g., an area overlapping with the display area DA, and an area portion, in which the recess area RA is not present, from among portions of an area overlapping with the tracking area TA) may contact the waveguide  240 . 
     In an embodiment, the first optical lens  281  may not include the recess area RA, differently from the second optical lens  282 . 
     At least one of the first optical lens  281  and the second optical lens  282  may include the function of a focusing lens. For example, the first optical lens  281  and/or the second optical lens  282  may be a convex lens, a concave lens, or a planar lens. Although either the first optical lens  281  or the second optical lens  282  is shown as being a convex lens in  FIG. 8  in accordance with an embodiment, the exemplary embodiments of the disclosure are not limited thereto. When the first optical lens  281  or the second optical lens  282  is a convex lens or a concave lens, the convexness or concaveness of the first optical lens  281  or the second optical lens  282  may be adjusted in accordance with the eyesight of the user  10 . 
     The waveguide  240  may be disposed between the first optical lens  281  and the second optical lens  282 . In an embodiment, the waveguide  240  may include a plurality of guides. For example, the waveguide  240  may include a first guide  241 , a second guide  242 , a third guide  243 , and a cover guide  244 . 
     In an embodiment, the second guide  242  may be disposed on a front surface of the first guide  241 , the third guide  243  may be disposed on a front surface of the second guide  242 , and the cover guide  244  may be disposed on a front surface of the third guide  243 . A back surface of the first guide  241  may face the second optical lens  282 . Spacers  245  may be disposed between adjacent ones of the first guide  241 , the second guide  242 , the third guide  243 , and the cover guide  244 , respectively. The spacers  245  may overlap with the tracking area TA. Adjacent ones of the first guide  241 , the second guide  242 , the third guide  243 , and the cover guide  244  may be spaced apart from each other by a predetermined distance under the condition that a corresponding one of the spacers  245  is interposed therebetween. 
     In an embodiment, each of the first guide  241 , the second guide  242 , and the third guide  243  may include, at one surface (or both surfaces) thereof, a corresponding one of diffraction gratings  241 D,  242 D and  243 D. The diffraction gratings  241 D,  242 D and  243 D may totally reflect light within the waveguide  240 . In addition, each of the diffraction gratings  241 D,  242 D and  243 D may output light to the outside of the waveguide  240 , corresponding to a predetermined area of the waveguide  240 . In addition, each of the diffraction gratings  241 D,  242 D and  243 D may adjust the refraction order of light output to the outside of the waveguide  240 . In accordance with embodiments, the diffraction gratings  241 D,  242 D and  243 D may include a wire grid polarizer (WGP), e.g., the diffraction gratings  241 D,  242 D and  243 D may overlap each other and the display area DA. 
     In an embodiment, one of the first guide  241 , the second guide  242 , and the third guide  243  may selectively output red light to the outside of the waveguide  240 , another one thereof may output green light to the outside of the waveguide  240 , and the remaining one thereof may output blue light to the outside of the waveguide  240 . For example, the wavelength of red light may be about 620 nm to about 750 nm, the wavelength of green light may be about 495 nm to about 570 nm, and the wavelength of blue light may be about 450 nm to about 495 nm. 
     The cover guide  244  may include a function for protecting the first guide  241 , the second guide  242 , and the third guide  243 . In an embodiment, the cover guide  244  may have a uniform thickness. 
     The frame  270  may be a supporter mounted to a head portion of the user  10  when the user  10  wears the augmented reality glasses  20 . In the interior of the frame  270 , electrical wirings for electrical connection among the timing controller  211 , the scan driver  213 , the data driver  212 , the pixel part  214 , the optical element  215 , the light emission part  250 , and the light receiving part  260  may be mounted. 
     As illustrated in  FIG. 7 , the frame  270  may support (or fix) the left eye lens part  291  and the right eye lens part  292 . The frame  270  may include a left eye lens support area  270 L and a right eye lens support area  270 R. The left eye lens support area  270 L and the right eye lens support area  270 R may fix the left eye lens part  291  and the right eye lens part  292 , respectively. The left eye lens support area  270 L and the right eye lens support area  270 R may surround at least parts of edges of the left eye lens part  291  and the right eye lens part  292 , respectively, e.g., the left and right eye lens support areas  270 L and  270 R may completely surround perimeters of the respective left and right eye lens parts  291  and  292  (dark round portions in  FIG. 7 ). 
     In an embodiment, the frame  270  may further include a nose bridge  270 N. The nose bridge  270 N, which is a supporter interconnecting the left eye lens support area  270 L and the right eye lens support area  270 R, may support a nose portion of the user  10  when the user  10  wears the augmented reality glasses  20 . For example, a microphone, which records sound and transmits a recorded sound signal to the control part  310 , may be mounted in the nose bridge  270 N. 
     In an embodiment, the light receiving part  260  may be mounted in the frame  270 . For example, the light receiving part  260  may be disposed in the nose bridge  270 N, e.g., for detecting the amount of infrared light reflected back from the cornea. 
     For example, as illustrated in  FIG. 7 , the nose bridge  270 N is included in the frame  270  and, as such, is integrated with the left eye lens support area  270 L and the right eye lens support area  270 R, e.g., as a seamless integrated structure. In another example, the nose bridge  270 N may have a structure separated from the frame  270 . 
     Hereinafter, the light emission part  250  in the frame  270  will be described in detail with reference to  FIGS. 9 and 10 .  FIG. 9  is an enlarged view of portion A of  FIG. 7 , and  FIG. 10  is a cross-sectional view along line II-IF in  FIG. 9 . 
     Referring to  FIGS. 7 to 10 , the light emission part  250  may include a base substrate  251 , a light emitting chip LED disposed on the base substrate  251 , an insulating layer  256 , first and second pads  254  and  255  connected to the light emitting chip LED, and a filling member  253 . In an embodiment, the light emission part  250  may be disposed in the recess area RA formed at the edge of the front surface of the second optical lens  282 . For example, referring to  FIGS. 7 and 8 , a plurality of light emission parts  250  may be spaced apart from each other along an entire perimeter of the tracking area TA (e.g., the small squares along the tracking area TA in  FIG. 7  indicating a light emitting chip LED in each of the light emission parts  250  to be described below). 
     In detail, the base substrate  251  may be disposed in the recess area RA (on the front surface of the second optical lens  282 ), e.g., the base substrate  251  may be directly on the back surface of the first guide  241  in the tracking area TA. For example, the base substrate  251  may be a material suitable for growth of a semiconductor, a carrier wafer, or the like. For example, the base substrate  251  may be a transparent substrate, e.g., the material of the base substrate  251  may include GaAs. In another example, the base substrate  251  may include a material (or an opaque material) such as sapphire (Al 2 SO 4 ), Si, SiC, GaN, ZnO, etc. 
     The light emitting chip LED may be disposed on one surface, e.g., directly on the back surface, of the base substrate  251 . The light emitting chip LED may include an n-type semiconductor layer  257 , a light emitting layer  258 , and a p-type semiconductor layer  259 . In an embodiment, the light emitting chip LED may be of an epitaxial growth type. 
     The n-type semiconductor layer  257  may be disposed on the base substrate  251 . The n-type semiconductor layer  257  may be grown on the base substrate  251 . In detail, growth of the n-type semiconductor layer  257  may be achieved by deposition technology, e.g., a metal organic chemical vapor deposition (MOCVD), a metal organic vapor phase epitaxy (MOVPE), or a molecular beam epitaxy (MBE). 
     The light emitting layer  258  and the p-type semiconductor layer  259  may be sequentially disposed on the n-type semiconductor layer  257 . Here, deposition technology for growing the light emitting layer  258  and the p-type semiconductor layer  259  may be identical to the above-described deposition technology for the n-type semiconductor layer  257 . 
     For example, the n-type semiconductor layer  257  and the p-type semiconductor layer  259  may be embodied using a group III-V, group II-VI, etc. compound semiconductor. In some embodiments, each of the n-type semiconductor layer  257  and the p-type semiconductor layer  259  may be embodied as a nitride semiconductor layer. For example, the n-type semiconductor layer  257  and the p-type semiconductor layer  259  may be an n-GaN semiconductor layer and a p-GaN semiconductor layer, respectively. However, the n-type semiconductor layer  257  and the p-type semiconductor layer  259  according to this embodiment are not limited to the above-described conditions, and may be made of any suitable materials in accordance with diverse characteristics required in an LED device. 
     An n-type semiconductor is a semiconductor in which free electrons are used as carriers for transferring charges, and may be formed by doping with an n-type dopant, e.g., Si, Ge, Sn, Te, etc. A p-type semiconductor is a semiconductor in which holes are used as carriers for transferring charges, and may be formed by doping a p-type dopant, e.g., Mg, Zn, Ca, Ba, etc. 
     In an embodiment, a certain region of the n-type semiconductor layer  257  may not overlap with a region in which the p-type semiconductor layer  259  is disposed. 
     In an embodiment, the light emitting layer  258  is a layer which is disposed between the n-type semiconductor layer  257  and the p-type semiconductor layer  259 , and in which carriers of the n-type semiconductor layer  257 , i.e., electrons, and carriers of the p-type semiconductor layer  259 , i.e., holes, meet. When electrons and holes meet in the light emitting layer  258 , a potential barrier is formed in accordance with re-combination of the electrons and the holes. When the electrons and holes transition to a low energy level while crossing the potential barrier in accordance with an applied voltage, light having a wavelength corresponding to the low energy level is emitted. For example, the light emitting layer  258  may emit light having a wavelength in an infrared band. 
     In an embodiment, the light emitting layer  258  may have a multi-quantum well (MQW) structure, but the exemplary embodiments of the disclosure are not limited thereto. The light emitting layer  258  may have various structures such as single-quantum well (SQW) structure, a quantum dot (QD) structure, etc. When the light emitting layer  258  is formed to have a multi-quantum well structure, a well layer/barrier layer of the light emitting layer  258  may be formed to have a structure such as InGaN/GaN, InGaN/InGaN, or GaAs(InGaGs)/AlGaAs, but the exemplary embodiments of the disclosure are not limited thereto. In addition, the number of quantum wells included in the light emitting layer  258  is not limited to a particular number. 
     The insulating layer  256  may be disposed on the light emitting chip LED. In an embodiment, the insulating layer  256  may be a passivation layer. For example, the insulating layer  256  may be made of an insulating material such as Al 2 O 3 , SiN or SiO 2 . 
     In an embodiment, the first pad  254  and the second pad  255  may be disposed on the insulating layer  256 . The first pad  254  and the second pad  255  may be disposed at the same level, e.g., directly on a same layer. The first pad  254  and the second pad  255  may be disposed to be spaced apart from each other. The first pad  254  may be electrically connected to the n-type semiconductor layer  257 . For example, the first pad  254  may be connected to the n-type semiconductor layer  257  while extending through the insulating layer  256  via a first contact hole CH 1  exposing a region of the n-type semiconductor layer  257  not overlapping with the region the p-type semiconductor layer  259 . The second pad  255  may be connected to the p-type semiconductor layer  259  while extending through the insulating layer  256  via a second contact hole CH 2  exposing the p-type semiconductor layer  259 . In an embodiment, the first pad  254  and the second pad  255  may be an opaque metal including Ag, Ni, Cu, Sn, Au, or the like, or may be a transparent metal including ITO, IZO, ZnO or the like. 
     In an embodiment, the augmented reality glasses  20  may further include a first wiring  101 , a second wiring  102 , and bumps  103 . The first wiring  101  may be electrically connected to the first pad  254 , and the second wiring  102  may be electrically connected to the second pad  255 . The first wiring  101  and the second wiring  102  may extend into the interior of the frame  270 . 
     The bumps  103  may be directly disposed on the first pad  254  and the second pad  255 . The first wiring  101  and the second wiring  102  may be disposed on the bumps  103 . The first wiring  101  and the second wiring  102  may be disposed at the same level, e.g., directly on a same layer. The first wiring  101  and the second wiring  102  may be disposed to be spaced apart from each other. The bumps  103  may be disposed between the first pad  254  and the first wiring  101 , and between the second pad  255  and the second wiring  102 , respectively. The first wiring  101  may be electrically connected to the first pad  254  through a corresponding one of the bumps  103 . The second wiring  102  may be electrically connected to the second pad  255  through a corresponding one of the bumps  103 . In an embodiment, a planar width w 2  of each of the first wiring  101  and the second wiring  102  may be about 50 μm to about 150 μm. 
     In an embodiment, the bumps  103  may include a metal, e.g., Ag epoxy or SAC epoxy. A material included in the bumps  103  may have a relatively low melting point. In an embodiment, the first wiring  101  and the second wiring  102  may be an opaque metal, e.g., including Ag, Ni, Cu, Sn, Au, or the like, or may be a transparent metal, e.g., including ITO, IZO, ZnO or the like. 
     In an embodiment, the light emitting chip LED may be of an n-type front emission type. For example, the light emitting chip LED may emit light in a stack direction of the n-type semiconductor layer  257 , the light emitting layer  258 , and the p-type semiconductor layer  259 . The light emitting chip LED may directly emit infrared light in a direction toward the eyes  11  of the user  10  (dashed arrows in  FIG. 8 ), i.e., the infrared light emitted toward the cornea of the user for detecting a sight direction. 
     The filling member  253  may fill the recess area. In an embodiment, the filling member  253  may substantially fill the recess area without forming a gap. For example, the filling member  253  may be disposed on the insulating layer  256 . For example, the filling member  253  may be formed to cover a top portion of the light emitting chip LED and an edge of the light emitting chip LED. For example, the filling member  253  may be filled between the second optical lens  282  and the light emitting chip LED without forming a gap, except for a portion of the space where the insulating layer  256  is formed. 
     In an embodiment, the filling member  253  may include a transparent resin. The transparent resin may transmit light having wavelengths in the visible and infrared bands therethrough. Since the filling member  253  is filled between the second optical lens  282  and the light emitting chip LED without forming a gap, respective refraction index differences between the light emitting chip LED and the filling member  253 , and between the filling member  253  and the second optical lens  282  may be relatively small. 
     Next, augmented reality glasses according to another exemplary embodiment of the disclosure will be described. In the following description, no description will be given of constituent elements identical to those of  FIGS. 1 to 10 , and the constituent elements will be designated by reference numerals identical or similar to those of  FIGS. 1 to 10 . 
       FIG. 11  is a cross-sectional view of a certain area of augmented reality glasses according to an exemplary embodiment of the disclosure. 
     Referring to  FIG. 11 , the augmented reality glasses according to this embodiment differ from the augmented reality glasses  20  according to the embodiment of  FIG. 8  in that a first optical lens  281 _ 1  and a second optical lens  282 _ 2  are concave lenses, respectively. That is, in an embodiment, a front surface of the first optical lens  281 _ 1  may be a curved surface, and a back surface of the first optical lens  281 _ 1 , which contacts a front surface of a waveguide  240 , may be a flat surface. A front surface of the second optical lens  282 _ 2  may be a flat surface including a recess area at an edge thereof, and a back surface of the second optical lens  282 _ 2  may be a curved surface. 
       FIG. 12  is a cross-sectional view of a certain area of augmented reality glasses according to an exemplary embodiment of the disclosure. 
     Referring to  FIG. 12 , the augmented reality glasses according to this embodiment differ from the augmented reality glasses  20  according to the embodiment of  FIG. 8  in that a light emission part  250 _ 1  is disposed between the first optical lens  281  and waveguide  240 . That is, in an embodiment, a front surface of the first optical lens  281  may be a curved surface, and a back surface of the first optical lens  281 , which contacts a front surface of a waveguide  240 , may be a flat surface. The first optical lens  281  may include, at an edge of the back surface thereof, the recess area RA in which the light emission part  250 _ 1  may be disposed. The recess area RA may be disposed between the first optical lens  281  and the waveguide  240 . In an embodiment, the second optical lens  282  may not include the recess area RA, different from the first optical lens  281 . 
     Referring to  FIGS. 13 to 16 , augmented reality glasses  20 - 1  according to this embodiment differ from the augmented reality glasses according to the embodiment of  FIGS. 7 to 10  in that a filling member  253 _ 1  includes a black resin. For example, the black resin may include a function for selectively transmitting light having wavelengths in an infrared band therethrough. 
     In detail, the filling member  253 _ 1  may be formed throughout an entire surface of the tracking area TA. Light having wavelengths in the visible spectrum may not be allowed to pass through tracking areas TA in the lens part  291 / 292 . Accordingly, the tracking areas TA may be visually recognized as a dark color (e.g., black) by the user  10 . In an embodiment, the filling member  253 _ 1  may not be disposed in the display area DA. The filling member  253 _ 1  may provide a sense of unity together with the frame  270  and, as such, may further include an aesthetic function. In addition, it may be possible to minimize visual recognition of a moiré pattern in the tracking areas TA due to the first wiring  101 , the second wiring  102 , and the light emitting chip LED. 
     By way of summation and review, a user wearing a head-mounted display cannot visually recognize a physical object in front of the head-mounted display in a powered-off state of the head-mounted display because the head-mounted display shields the user&#39;s eyes. Therefore, research regarding wearable augmented reality glasses having a form of glasses different from the head-mounted display have been proposed in order to enable the user to visually recognize a physical object in front of the augmented reality glasses even in a powered-off state, e.g., similarly to general glasses. 
     Exemplary embodiments of the disclosure provide augmented reality lenses, in which a light emitting chip emits infrared light, and augmented reality glasses and an augmented reality system including the same. That is, according to embodiments of the present disclosure, since infrared light for tracking the user&#39;s eye is emitted from the front of the user&#39;s eye, tracking accuracy may be increased. In addition, since the light emitting chip is mounted on a flat position in the augmented reality lens, the difficulty of the process of manufacturing the light emitting chip may be reduced relative to the difficulty of the process of manufacturing a frame of augmented reality glasses having a curved surface. Furthermore, since the light emitting chip is mounted in the augmented reality lens, a frame of the augmented reality glasses may be reduced in thickness. 
     Example embodiments have been disclosed herein, and although specific terms are employed, they are used and are to be interpreted in a generic and descriptive sense only and not for purpose of limitation. In some instances, as would be apparent to one of ordinary skill in the art as of the filing of the present application, features, characteristics, and/or elements described in connection with a particular embodiment may be used singly or in combination with features, characteristics, and/or elements described in connection with other embodiments unless otherwise specifically indicated. Accordingly, it will be understood by those of skill in the art that various changes in form and details may be made without departing from the spirit and scope of the present invention as set forth in the following claims.