Patent Publication Number: US-9429772-B1

Title: Eyeglass frame with input and output functionality

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     The present application is a continuation of U.S. patent application Ser. No. 13/413,936, filed on Mar. 7, 2012, the disclosure of which is incorporated herein by reference. 
    
    
     BACKGROUND 
     Personal video or image displays are devices that are used to display an image received from a source for viewing by a single user. Such devices can be in the form of head-mounted displays that are worn on the head of a user and include one or more image sources over or in front of the user&#39;s eyes. Head-mounted displays can include an image source positioned adjacent and associated with each eye of the user or wearer and can be configured to present the same image, viewable as a single two-dimensional image. Alternatively, some such devices can be configured to present different stereoscopic images that are interpreted by the viewer as a single three-dimensional image. Regardless of the type of image presented to the user, such devices are usually blacked-out. That is, they almost entirely obstruct the wearer&#39;s vision outside of the screen or other image source included therein so that the user can see nothing but the image presented by the device&#39;s display system. 
     Other personal image displays can be what is referred to as a heads-up display, wherein the image is displayed on, in, or through a transparent display that superimpose the displayed image over a view of the surrounding environment. These allow the user to view the image presented by the display simultaneously with their surroundings. Such devices, however, can have many limitations, including in their fit and comfort to their wearers as well as limited functionality. 
     Both head-mounted and heads-up displays can be connected to a video source that receives a video signal that the device can read and convert into the image that they present to the user. The video source can be received from a portable device such as a video player, a portable media player or computers. Some such display devices are also configured to receive sound signals, which are delivered to the user typically through incorporated headphones. The functionality of these types of displays is, however, limited to passive actions wherein the display simply receives information from an external source and presents it to the wearer in limited forms. 
     BRIEF SUMMARY 
     An aspect of the present disclosure relates to an electronic device, including a frame configured to be worn on the head of a user. The frame includes first and second rims with lenses affixed therein and a bridge portion positioned between the first and second rims and configured to rest on a portion of the nose of the user. The frame further includes first and second temple portions extending away from the rims to respective ends thereof and configured to be positioned over respective first and second temples of the user with the ends disposed near first and second ears of the user. The device further includes a display element positionable over one of the first and second lenses and a housing having an arm portion affixed to the first temple portion of the frame and defining a longitudinal axis. The housing also includes an elbow portion defining a display end of the housing and supporting the display element such that the display element extends along a display axis that is angled with respect to the longitudinal axis. Image generating means are disposed within the housing and are configured for generating an image presentable to the user on the display element. An input device is affixed to the housing and is configured for receiving from the user an input associated with a function, the function being related to information that is presentable on the display element. 
     The elbow portion can be configured to extend at least partially along the longitudinal axis through a portion thereof that is adjacent the temple portion such that the display element can be positioned at a distance away from the respective lens in a direction along the display axis. Further, the arm portion of the housing can contact the temple portion of the frame, and the elbow portion of the housing can be spaced apart from the frame. The elbow portion can be curved so as to extend away from the arm portion in an arcuate fashion to the display end of the housing. The arm portion and the elbow portion can be discrete elements rotatably affixed to each other about an axis substantially parallel to the display axis such that the display element can be adjustable toward and away from a brow of the user by rotation of the elbow portion relative to the arm portion. The display axis can be angled at between about 80° and 100° with respect to the longitudinal axis. 
     The input device can be positioned in the arm portion, and the image generating means can be positioned in the elbow portion. The housing of the operational unit can define an outer wall, and the input device can include touch-sensitive circuitry disposed within the housing such that at least a portion of the outer wall of the housing is configured as a touch-based input surface. The housing within the arm portion can overlie the first temple portion such that the touch-based input surface is positioned along the temple portion. The arm portion of the housing can be removably affixed to the first temple portion of the frame. 
     The first and second temple portions can be rotatably affixed to the rims such that frame is selectively positionable in a folded configuration and a wearable configuration. 
     The display element can be a generally transparent prism configured to combine the image presentable to the user thereon with a user view through the display element. 
     Another aspect of the present disclosure relates to an electronic device, including a frame configured to be worn on the head of a user. The frame includes first and second rims with lenses affixed therein and a bridge portion positioned between the first and second rims and configured to rest on a portion of the nose of the user. The frame further includes first and second temple portions extending away from the rims to respective ends thereof that are configured to be positioned over respective first and second temples of the user with the ends disposed near first and second ears of the user. The device further includes a display element positionable over one of the first and second lenses and a housing having an arm portion affixed to the first temple portion of the frame and defining a longitudinal axis, the housing also including an elbow portion defining a display end of the housing and supporting the display element such that the display element extends along a display axis that is angled with respect to the longitudinal axis. Control circuitry is disposed within the housing, and includes image generating means configured for generating an image presentable to the user on the display element. The device further includes a camera having a lens thereof mounted within the frame such that the camera lens is exposed and is directed substantially parallel to the longitudinal axis. The camera is electrically connected with the control circuitry through the frame. 
     The housing can further include an outer wall configured as a touch-based input surface connected with the control circuitry and adapted for receiving from the user an input associated with a function that can be related to information that is presentable on the display element. 
     The camera can be mounted within the bridge portion of the frame. Alternatively, the camera can be mounted within the second temple portion. The second temple portion can include a camera housing portion in which the camera is mounted. In such an example, the camera lens can be exposed on the camera housing portion. The camera housing portion can include a side wall and input means disposed along the side wall. 
     Another aspect of the present disclosure relates to an electronic device, including a frame configured to be worn on the head of a user. The frame includes first and second rims with lenses affixed therein and a bridge portion positioned between the first and second rims. The bridge portion is configured to rest on a portion of the nose of the user. First and second temple portions extending away from the rims to respective ends thereof and are configured to be positioned over respective first and second temples of the user. The frame further includes an electronics housing affixed on the end of the first temple portion and having a portion that is configured to extend around at least a portion of an ear of the user adjacent the first temple, the electronics housing containing an electronic element therein. The device further includes a display element positionable over one of the first and second lenses and a housing having an arm portion affixed to the first temple portion of the frame and defining a longitudinal axis. The housing also has an elbow portion defining a display end of the housing and supporting the display element such that the display element extends along a display axis that is angled with respect to the longitudinal axis. Image generating means are disposed within the housing and are configured for generating an image presentable to the user on the display element. The image generating means are electrically connected with the electronic element of the frame. 
     The electronic element can include conductive connections configured for connecting with a battery. The conductive connections can be further configured to provide electronic power from such a battery to the image generating means, and the electronics housing can be further configured to enclose such a battery. 
     The housing can be positioned on a first side of the ear of the user such that it exerts a first weight force at a point disposed on the first side of the ear, and the electronics housing can be configured to exert a second weight force disposed on a second side of the ear of the user. The electronics housing can be further configured such that the first weight force and the second weight force contribute to an overall weight of the device that is distributed among the nose of the user and the ear of the user such that a majority of the overall weight is applied to the ear. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows an exemplary system for receiving, transmitting, and displaying data; 
         FIG. 2  shows an alternate view of the system of  FIG. 1 ; 
         FIG. 3A  shows an example system for receiving, transmitting, and displaying data; 
         FIG. 3B  shows another example system for receiving, transmitting, and displaying data; 
         FIG. 4  shows an example architecture for receiving, transmitting, and displaying data; 
         FIG. 5  shows a wearable computer device according to an embodiment of the present disclosure; 
         FIG. 6  shows the device of  FIG. 5  being worn on the head of a user; 
         FIGS. 7A-7C  show the device of  FIG. 5  in exemplary adjustment configurations thereof; 
         FIGS. 8A and 8B  are schematic drawings illustrating aspects of the device of  FIGS. 7A-C ; 
         FIG. 9  shows an alternative embodiment of a wearable computer device according to another embodiment of the present disclosure; 
         FIG. 10  shows another alternative embodiment of a wearable computer device according to another embodiment of the present disclosure; 
         FIG. 11  shows detail of an aspect of the device of  FIG. 10 ; and 
         FIG. 12  shows an exploded view of the device of  FIG. 10 . 
     
    
    
     DETAILED DESCRIPTION 
     Embodiments of the present disclosure are described herein with reference to the drawing figures.  FIG. 1  illustrates an example system  100  for receiving, transmitting, and displaying data. The system  100  is shown in the form of a wearable computing device. While  FIG. 1  illustrates a head-mounted device  102  as an example of a wearable computing device, other types of wearable computing devices could additionally or alternatively be used. As illustrated in  FIG. 1 , the head-mounted device  102  comprises frame elements including lens-frames  104 ,  106  and a center frame support  108 , lens elements  110 ,  112 , and extending side-arms  114 ,  116 . The center frame support  108  and the extending side-arms  114 ,  116  are configured to secure the head-mounted device  102  to a user&#39;s face via a user&#39;s nose and ears, respectively. 
     Each of the frame elements  104 ,  106 , and  108  and the extending side-arms  114 ,  116  may be formed of a solid structure of plastic and/or metal, or may be formed of a hollow structure of similar material so as to allow wiring and component interconnects to be internally routed through the head-mounted device  102 . Other materials may be possible as well. 
     One or more of each of the lens elements  110 ,  112  may be formed of any material that can suitably display a projected image or graphic. Each of the lens elements  110 ,  112  may also be sufficiently transparent to allow a user to see through the lens element. Combining these two features of the lens elements may facilitate an augmented reality or heads-up display where the projected image or graphic is superimposed over a real-world view as perceived by the user through the lens elements. 
     The extending side-arms  114 ,  116  may each be projections that extend away from the lens-frames  104 ,  106 , respectively, and may be positioned behind a user&#39;s ears to secure the head-mounted device  102  to the user. The extending side-arms  114 ,  116  may further secure the head-mounted device  102  to the user by extending around a rear portion of the user&#39;s head. Additionally or alternatively, for example, the system  100  may connect to or be affixed within a head-mounted helmet structure. Other possibilities exist as well. 
     The system  100  may also include an on-board computing system  118 , a video camera  120 , a sensor  122 , and a finger-operable touch pad  124 . The on-board computing system  118  is shown to be positioned on the extending side-arm  114  of the head-mounted device  102 ; however, the on-board computing system  118  may be provided on other parts of the head-mounted device  102  or may be positioned remote from the head-mounted device  102  (e.g., the on-board computing system  118  could be wire- or wirelessly-connected to the head-mounted device  102 ). The on-board computing system  118  may include a processor and memory, for example. The on-board computing system  118  may be configured to receive and analyze data from the video camera  120  and the finger-operable touch pad  124  (and possibly from other sensory devices, user interfaces, or both) and generate images for output by the lens elements  110  and  112 . 
     The video camera  120  is shown positioned on the extending side-arm  114  of the head-mounted device  102 ; however, the video camera  120  may be provided on other parts of the head-mounted device  102 . The video camera  120  may be configured to capture images at various resolutions or at different frame rates. Many video cameras with a small form-factor, such as those used in cell phones or webcams, for example, may be incorporated into an example of the system  100 . 
     Further, although  FIG. 1  illustrates one video camera  120 , more video cameras may be used, and each may be configured to capture the same view, or to capture different views. For example, the video camera  120  may be forward facing to capture at least a portion of the real-world view perceived by the user. This forward facing image captured by the video camera  120  may then be used to generate an augmented reality where computer generated images appear to interact with the real-world view perceived by the user. 
     The sensor  122  is shown on the extending side-arm  116  of the head-mounted device  102 ; however, the sensor  122  may be positioned on other parts of the head-mounted device  102 . The sensor  122  may include one or more of a gyroscope or an accelerometer, for example. Other sensing devices may be included within, or in addition to, the sensor  122  or other sensing functions may be performed by the sensor  122 . 
     The finger-operable touch pad  124  is shown on the extending side-arm  114  of the head-mounted device  102 . However, the finger-operable touch pad  124  may be positioned on other parts of the head-mounted device  102 . Also, more than one finger-operable touch pad may be present on the head-mounted device  102 . The finger-operable touch pad  124  may be used by a user to input commands. The finger-operable touch pad  124  may sense at least one of a position and a movement of a finger via capacitive sensing, resistance sensing, or a surface acoustic wave process, among other possibilities. The finger-operable touch pad  124  may be capable of sensing finger movement in a direction parallel or planar to the pad surface, in a direction normal to the pad surface, or both, and may also be capable of sensing a level of pressure applied to the pad surface. The finger-operable touch pad  124  may be formed of one or more translucent or transparent insulating layers and one or more translucent or transparent conducting layers. Edges of the finger-operable touch pad  124  may be formed to have a raised, indented, or roughened  20  surface, so as to provide tactile feedback to a user when the user&#39;s finger reaches the edge, or other area, of the finger-operable touch pad  124 . If more than one finger-operable touch pad is present, each finger-operable touch pad may be operated independently, and may provide a different function. 
       FIG. 2  illustrates an alternate view of the system  100  illustrated in  FIG. 1 . As shown in  FIG. 2 , the lens elements  110 ,  112  may act as display elements. The head-mounted device  102  may include a first projector  128  coupled to an inside surface of the extending side-arm  116  and configured to project a display  130  onto an inside surface of the lens element  112 . Additionally or alternatively, a second projector  132  may be coupled to an inside surface of the extending side-arm  114  and configured to project a display  134  onto an inside surface of the lens element  110 . 
     The lens elements  110 ,  112  may act as a combiner in a light projection system and may include a coating that reflects the light projected onto them from the projectors  128 ,  132 . In some embodiments, a reflective coating may not be used (e.g., when the projectors  128 ,  132  are scanning laser devices). 
     In alternative embodiments, other types of display elements may also be used. For example, the lens elements  110 ,  112  themselves may include: a transparent or semi-transparent matrix display, such as an electroluminescent display or a liquid crystal display, one or more waveguides for delivering an image to the user&#39;s eyes, or other optical elements capable of delivering an in focus near-to-eye image to the user. A corresponding display driver may be disposed within the frame elements  104 ,  106  for driving such a matrix display. Alternatively or additionally, a laser or LED source and scanning system could be used to draw a raster display directly onto the retina of one or more of the user&#39;s eyes. Other possibilities exist as well. 
       FIG. 3A  illustrates an example system  200  for receiving, transmitting, and displaying data. The system  200  is shown in the form of a wearable computing device  202 . The wearable computing device  202  may include frame elements and side-arms such as those described with respect to  FIGS. 1 and 2 . The wearable computing device  202  may additionally include an on-board computing system  204  and a video camera  206 , such as those described with respect to  FIGS. 1 and 2 . The video camera  206  is shown mounted on a frame of the wearable computing device  202 ; however, the video camera  206  may be mounted at other positions as well. 
     As shown in  FIG. 3A , the wearable computing device  202  may include a single display  208  which may be coupled to the device. The display  208  may be formed on one of the lens elements of the wearable computing device  202 , such as a lens element described with respect to  FIGS. 1 and 2 , and may be configured to overlay computer-generated graphics in the user&#39;s view of the physical world. The display  208  is shown to be provided in a center of a lens of the wearable computing device  202 , however, the display  208  may be provided in other positions. The display  208  is controllable via the computing system  204  that is coupled to the display  208  via an optical waveguide  210 . 
       FIG. 3B  illustrates an example system  220  for receiving, transmitting, and displaying data. The system  220  is shown in the form of a wearable computing device  222 . The wearable computing device  222  may include side-arms  223 , a center frame support  224 , and a bridge portion with nosepiece  225 . In the example shown in  FIG. 3B , the center frame support  224  connects the side-arms  223 . The wearable computing device  222  does not include lens-frames containing lens elements. The wearable computing device  222  may additionally include an onboard computing system  226  and a video camera  228 , such as those described with respect to  FIGS. 1 and 2 . 
     The wearable computing device  222  may include a single lens element  230  that may be coupled to one of the side-arms  223  or the center frame support  224 . The lens element  230  may include a display such as the display described with reference to  FIGS. 1 and 2 , and may be configured to overlay computer-generated graphics upon the user&#39;s view of the physical world. In one example, the single lens element  230  may be coupled to the inner side (i.e., the side exposed to a portion of a user&#39;s head when worn by the user) of the extending side-arm  223 . The single lens element  230  may be positioned in front of or proximate to a user&#39;s eye when the wearable computing device  222  is worn by a user. For example, the single lens element  230  may be positioned below the center frame support  224 , as shown in  FIG. 3B . 
       FIG. 4  illustrates a schematic drawing of an example computer network infrastructure. In system  300 , a device  310  communicates using a communication link  320  (e.g., a wired or wireless connection) to a remote device  330 . The device  310  may be any type of device that can receive data and display information corresponding to or associated with the data. For example, 10 the device  310  may be a heads-up display system, such as the head-mounted device  102 ,  200 , or  220  described with reference to  FIGS. 1-3B . 
     Thus, the device  310  may include a display system  312  comprising a processor  314  and a display  316 . The display  310  may be, for example, an optical see-through display, an optical see-around display, or a video see-through display. The processor  314  may receive data from the remote device  330 , and configure the data for display on the display  316 . The processor  314  may be any type of processor, such as a micro-processor or a digital signal processor, for example. 
     The device  310  may further include on-board data storage, such as memory  318  coupled to the processor  314 . The memory  318  may store software that can be accessed and executed by the processor  314 , for example. 
     The remote device  330  may be any type of computing device or transmitter including a laptop computer, a mobile telephone, or tablet computing device, etc., that is configured to transmit data to the device  310 . The remote device  330  and the device  310  may contain hardware to enable the communication link  320 , such as processors, transmitters, receivers, antennas, etc. 
     In  FIG. 4 , the communication link  320  is illustrated as a wireless connection; however, wired connections may also be used. For example, the communication link  320  may be a wired serial bus such as a universal serial bus or a parallel bus. A wired connection may be a proprietary connection as well. The communication link  320  may also be a wireless connection using, e.g., Bluetooth® radio technology, communication protocols described in IEEE 802.11 (including any IEEE 802.11 revisions), Cellular technology (such as GSM, CDMA, UMTS, EVDO, WiMAX, or LTE), or Zigbee® technology, among other possibilities. The remote device  330  may be accessible via the Internet and may include a computing cluster associated with a particular web service (e.g., social-networking, photo sharing, address book, etc.). 
       FIGS. 5-12 , which do not adhere to the same numbering scheme used in  FIGS. 1-4 , illustrate a embodiments of a wearable device that can implement the various systems discussed above with reference to  FIGS. 1-4 .  FIG. 5  shows an embodiment of a device  410  that is wearable on the head of the user (in a similar fashion to the embodiment shown in  FIG. 6 ). As will be described in greater detail below, device  410  includes a wearable structure in the form of an eyeglass frame  412  that can be similar to a frame associated with prescription glasses or sunglasses. Frame  412  can provide the desired fit of device  410  on a user&#39;s head. Device  410  further includes a boom  414  that extends from a portion of frame  412  to a free end  416  thereof that includes a display element  454 . Boom  414  is affixed to frame  412  such that, when device  410  is properly worn by a user, display  454  of boom  414  can be positioned adjacent the user&#39;s eye, opposite any adjacent lens  418  for making an image presented thereon viewable by the user when viewed through the lens  418  supported by frame  412 . In this manner, the boom  414  is configured as a unit of the device  410  that carries out at least one operation of the device  410 , namely presenting an image to the user. Additional operations can also be carried out by boom  414 , which can also include an input device in the form of a touch-based input  470  that is accessible to the user to receive a touch input from the user to execute a control function of the device assembly  410  or a function of another electronic device that is connected or in communication with device assembly  410 . 
     Frame  412  can include one or more rims  430  that extend in lateral directions away from a central bridge  420 . The embodiment shown includes two rims  430 A and  430 B, each extending away from opposite sides of bridge  420 . Rims  430 A, 430 B are shaped to extend laterally past respective ones the wearer&#39;s eyes while being positioned at least above the eye so as to not obstruct the wearer&#39;s vision. Rims  430  are further structured to hold respective lenses  418  over the user&#39;s eyes. As such, in some embodiments rims  430  can fully encircle lenses  418  and, accordingly, the user&#39;s eyes. Other “half-rimed” or “rimless” configurations can be implemented in a similar structure. For example, glasses generally referred to as rimless include a bridge and respective arms directly attached to lenses. In such an embodiment, the structure of the overall frame given by the lenses can be considered equivalent to rims that are integral with the lenses. Additionally, lenses can be assembled with a band  613 , similar to that shown in  FIGS. 10 and 11 , in which the lenses  618  extend downwardly from the band  613  to cover the user&#39;s eyes. Returning to  FIG. 4 , number of different shapes and structures are possible for rims  430 A, 430 B, in addition to what is shown in the figures. The specific shape of rims  430 A, 430 B can depend on the shape and structure of bridge portion  420  or lenses  418  or can be configured for aesthetic or stylistic purposes. 
     Rims  430 A, 430 B can be of the same or a different material from bridge  420 . Examples of suitable materials for the rims  430 , or any other part of frame  412 , can include various types of thermoplastic such as polycarbonate, acrylic, ABS, and polyethylene or resin plastics such as urethane or the like. Any parts of frame  412 , including the bridge  420  and rims  430 , can be made from metal such as aluminum, stainless steel, titanium, nickel, gold, or various alloys including one or more of the metals listed or similar metals. Rims  430  can be monolithically formed with bridge  420  from the same material, or rims  430  and bridge  420  can be made from different materials and affixed together using adhesives, screws, various forms of welding, soldering, braising, or the like. 
     Bridge  420  and rims  430 A and  430 B can be arranged to provide a structure that allows frame  412  to rest on the nose of a user. As shown, rims  430 A and  430 B can extend away from bridge  420  along a portion thereof to conform generally to the shape of a nose. Further, bridge  420  can also be shaped to extend over the nose, either in contact therewith or spaced apart therefrom. In an embodiment, rims  430 A and  430 B can include respective nose pads  424  that can provide a greater area of contact with the user&#39;s nose. In an alternative structure, such as that shown in  FIG. 10 , bridge  620  can include a pair of arms  622  that extend downward therefrom to support pads  624  that are separate from any rims  630 A or  630 B present in frame  612 . The description of bridge arms  622  extending downward from bridge  620  is made in such a reference frame and is done for purposes of the present description. Discussion of any other relative reference directions is also made for similar purposes and none are intended to be limiting with respect to the present disclosure, unless explicitly stated. Pads  624  can be made of a material that is softer than arms  622  for purposes of comfort. Additionally the material that pads  624  are made from can be flexible or have a texture that prevents slippage along the surface of the user&#39;s nose. 
     Bridge arms  622  can be flexible to further provide a comfortable fit and or grip on the user&#39;s nose. Further, bridge arms  622  can be deformably bendable and repositionable so that the position of pads  624  can be changed to best fit the user. This can include movement closer together or farther apart or fore and aft relative to bridge  620 , which can adjust the height of bridge  620  and, accordingly, the position of boom  614  and its display  654  relative to the user&#39;s eye. Further adjustment of display and other structures thereof can be similar to those in the embodiments described above, as can the structures used to affix boom  614  to frame band  614 . In other embodiments, structures similar to arms and pads can be integrally formed with bridge  620  and can be structured such that larger or smaller areas of the bridge  620  contact the nose of the user, compared to the embodiment shown. In the embodiment shown in  FIG. 5 , the integrated nose pads  424  can be deformable or flexible to allow comfortable and adjustable fit in a similar manner to the bridge arms discussed with respect to  FIG. 10 . 
     As further shown in  FIG. 5 , frame  412  also includes one or more arms  440 A, 440 B that extend from the rims  430 A, 430 B, past the user&#39;s temple, and toward the user&#39;s ear. Frame  412  can include two arms  440 A, 440 B that can be positioned to extend in a rearward direction from respective rims  430 A, 430 B. Arms  440 A, 440 B may provide additional points, or areas, of contact with the user&#39;s head and contribute to the device&#39;s fit and retention to the user&#39;s head. Arms  440 A, 440 B can be similar in structure or function to corresponding features of eyeglasses. 
     Arms  440 A, 440 B can be integrally formed with respective rims  430 A, 430 B. Alternatively, arms  440 A, 440 B can be affixed to respective rims  430 A, 430 B using a hinge arranged to permit arms  440 A, 440 B to be folded inward toward rims  430 A, 430 B for storage or transportation. If hinges are used, they can be spring-loaded or the like to apply a comfortable pressure against the user&#39;s head or to accommodate a range of different head sizes comfortably. In some embodiments, arms  440  can be made of a plastic material with internal metal reinforcement to allow bending or to prevent breakage. Arms  440 A, 440 B can be configured to contact the head of the user along respective temples or in the area of respective ears of the user. 
     Arms  440 A, 440 B include respective free ends  444  opposite the respective rims  430 A, 430 B. Free ends  444  can be positioned to be located near the ear of a user when wearing device assembly  410 . Ear portions  446  can be affixed to or integrally formed with the free ends  444  of the arms  440 A, 440 B. As shown in  FIG. 5  ear portions  446  can include an arched, or curved, form such that they bend behind a portion of the rear of the user&#39;s ear. As with eyeglasses, the particular shape of ear portions  446  can vary in many ways including the amount by which they bend, the distance around the ear which they extend and the amount of contact, if any, actually maintained with the outside of the ear. In the example shown, ear portions  446  can have a subtly-arched form; however, other embodiments of ear portions can have a more pronounced curvature, such as those shown in  FIGS. 9 and 10 . In some embodiments, such as those discussed below with respect to  FIG. 9 , ear portions  446  can be configured to include various electronic components. Such electronic components can include batteries, control circuitry, communication devices, and the like, which can be connected with a boom by wires, traces or the like embedded within the arms. Further, ear portions  446  can be slidably attached to arms  440 A, 440 B to allow the wearer to adjust the position of ear portions  446  to achieve a customized fit. Further, ear portions  446  can bend inward to apply a pressure to the side of the wearer&#39;s head in the area of the respective ears. 
     Arms  440 A and  440 B can be structured to appropriately position ear portions  446  relative to rims  430 A, 430 B to achieve an appropriate fit for a user or a selection of different users. The shape of arms  440  can, accordingly, depend on the size and shape of rims  430 A, 430 B. For example, arms  440  can extend substantially rearward from their respective rims  430 A, 430 B substantially perpendicular thereto and can be substantially straight. In other embodiments, arms  440  can be angled inward, outward, upward, or downward relative to the outside ends of rims  430  and can further be curved in any direction (or multiple directions) to achieve a desired fit or aesthetic quality. 
     In the embodiment shown, display  454  is in the form of a generally-transparent prism that is configured to overlay or combine with the user&#39;s sight an image generated by electronic display components that are positioned within the housing  452 . Such a prism can be structured to receive a projected image in a receiving side  458  and to make that image visible to a user by looking into a viewing side  460  of display  454 . This can be done by configuring display  454  with a specific shape and or material characteristics. In the embodiment of  FIG. 5  the receiving side  458  of display  454  is adjacent to or within housing  452  such that the electronic components inside housing  452  can contain a video projector structured to project the desired video image into receiving side  458  of prism  454 . Such projectors can include an image source such as LCD, CRT, and OLED displays and a lens, if needed, for focusing the image on an appropriate area of prism  454 . The electronic components associated with display  454  can also include control circuitry for causing the projector to generate the desired image based on a video signal received thereby. Other types of displays and image sources are discussed herein and can also be incorporated into boom  414 . Further, a display can be in the form of a video screen consisting of, for example, a transparent substrate. In such an example, the image generating means can be circuitry for a LCD display, a CRT display or the like positioned directly behind the screen such that the overall display is not transparent. The housing of the boom can extend behind the display and the image generating means to enclose the image generating means in such an embodiment. 
     The receiving surface  458  of display  454  can be perpendicular to the viewing surface  460  of prism  454  such that a transparent prism can be used to combine the projected image with the view of the environment surrounding the wearer of the device. This would allow the user to observe both the surrounding environment and the image projected into prism  454 . The prism  454  and the display electronics can be configured to present an opaque or semi-transparent image, or combinations thereof, to achieve various desired image combinations. 
     As discussed above, an input device in the form of a touch-based input  470  is also desirably included in or on boom  414 . In the embodiment shown, housing  452  defines an arm portion  476  that can be elongated and can extend at an angle relative to display  454  (which is shown having an elongated shape so as to define a longitudinal axis therethrough). As shown in the figures, arm portion  476  can extend at an angle that can range from about 80° to about 110°. In an embodiment, display  454  is angled with respect to arm portion  476  at approximately 90°. Housing  452  can further be formed to define an elbow portion  450  that supports display  454  relative to arm portion  476  at the desired angle. Elbow portion  450  can be curved, as shown in the figures, or can include a bend formed by a sharp corner or can be configured such that display  454  projects directly outwardly from near arm portion  476  at the desired angle. In an embodiment, the image source associated with display  454  and its related circuitry can be held within housing  452  in elbow portion  450  thereof. Touch-based input can be positioned within arm portion  476  such that, when display  454  is positioned over a user&#39;s eye, arm portion  476  is positioned such that it extends over the user&#39;s temple adjacent that eye. 
     Touch-based input  470  can be a touchpad or trackpad-type device configured to sense at least one of a position and a movement of a finger via capacitive sensing, resistance sensing, or a surface acoustic wave process, among other possibilities. Touch-based input  470  can further be capable of sensing finger movement in a direction parallel or planar to a surface thereof, in a direction normal to the surface, or both, and may also be capable of sensing a level of pressure applied thereto. Touch-based input  470  can be formed having an outer layer of one or more insulating, or dielectric, layers that can be opaque, translucent, or transparent and an inner layer of one or more conducting layers that can be opaque, transparent, or translucent. 
     In an embodiment, the outer layer of the touch-based input  470  can be a portion of an outer wall  453  of housing  452 . This can provide a seamless or uniform incorporation of touch-based input  470  into housing  452 . The housing can define an interior cavity for containing the inner layer of the touch-based input  470  and any electrical structures, such as control circuitry, associated therewith. The outer layer of the touch-based input  470  can include the entire wall  453  or a selected operable area  472  in the form of one or more touch-surfaces  470  thereof, as dictated by the size, shape, and position of the inner layer of the touch-based input  470 . If a portion of the housing is to be used as the outer layer of the touch-based input  470 , then the housing  452  can be made of a dielectric material such as plastic. In an alternative embodiment, the touch-based input can be a discrete element that is mounted in an opening in the housing  452  that includes its own dielectric outer layer, separate from wall  453  to define the operable area within a window or opening through wall  453  in a manner similar to a touchpad on a laptop computer. 
     In the embodiment shown, touch-based input  470  is positioned on arm portion  476  and defines a vertical plane that overlies a portion of the side of the user&#39;s head. Accordingly, touch-based input  470  may not be visible to a user of the assembly  410 , when it is being worn. To help the user identify any operable areas  472  of touch-based input  470  the housing  476  can be formed to have a texture provided by a raised, indented, or roughened surface so as to provide tactile feedback to a user when the user&#39;s finger contacts the touch surface  472 . Such a texture can define the boundaries of the operable area  472 , can be consistent through the operable area  472 , or can vary along horizontal and vertical lengths of the operable area  472  to give the user feedback as to the location of a finger contacting operable area  472 . 
     Touch-based input  470  can also include additional operable areas  472  on wall  453  or on other portions of housing  452 , such as the top or bottom surfaces thereof. This can be achieved by positioning capacitive sensor layers, for example, beneath the selected housing surfaces. In other embodiments, additional touch-based inputs can be provided in different locations of boom  413  such as on elbow portion  450 . Each of the touch-based inputs  470  can be operated independently, and can provide different functions. Additionally, housing  452  can include additional input structures, such as a button (not shown) that can provide additional functionality for boom  414 , including implementing a lock or sleep feature or allowing a user to toggle the power for boom  414  between on and off states. In an example, such a button can be configured to signal circuitry within boom  414  to capture an image (i.e. to “take a picture”) using camera  426 . Such a button can similar in function and location to the button described in the co-pending, commonly-assigned U.S. patent application Ser. No. 13/353,445, the entire disclosure of which is incorporated by reference herein. 
     Touch-based input  470 , or another type of input, can be used to provide a control function that is executed by boom  414 , such as by an on-board CPU or a CPU mounted to or within an associated wearable structure, or by a remote device, such as a smartphone or a laptop computer. In an embodiment information related to the control function is viewable by the user on display  454 . In one example, the control function is the selection of a menu item. In such an example, a menu with a list of options can be presented on display  454 . The user can move a cursor or can scroll through highlighted options by predetermined movement of a finger along touch-based input  470  and can confirm the selection by a different movement, the acceptance of the selection being indicated by the display. Examples of menu item selections can include whether to answer or decline an incoming call on a remotely-linked smartphone or to scroll or zoom-in on a map presented in display. 
     Boom  414  can attach to frame  412  using any one of a number of different structures. In some embodiments it may be advantageous to make such attachment between a location on the arm portion  476  of housing  452  and a location along a corresponding arm  440 A or  440 B of frame  412 . Boom  414  can be affixed to frame  412  on either arm  440 A or arm  440 B thereof to position the display  454  over either the user&#39;s right eye or the user&#39;s left eye. In an embodiment, boom affixes at its arm portion  476  to one of the arms  440 A or  440 B of frame  412  with the arm portion  476  such that when worn it extends along the temple of the user on the side of the arm  440 A or  440 B toward the front of the user&#39;s face. To properly position display  450  at a distance away from the user&#39;s eye, arm portion  476  can extend along a longitudinal axis thereof that is tangent to a portion of the arm  440 A or  440 B (which can be at the point or within the area of attachment) and continues to extend along the longitudinal axis as the frame  412  curves or bends inward to attach with the corresponding rim  430 A or  430 B. This allows for at least approximately appropriate positioning of display  454  over the user&#39;s eye on the side of the arm  440 A or  440 B to which the boom  414  is attached given the angle at which elbow portion  450  positions display  454  relative to arm  476  of housing  452 . 
     Boom  414  can have a housing  452  that is split into display and arm portions that rotate relative to each other as shown in  FIGS. 7A-C . In the example shown in  FIG. 5 , housing  452  is divided into a display housing  475  and an arm housing  476 . As shown, display housing  475  defines elbow portion  450  and has display  454  mounted thereon. Display housing  475  can also include a camera, as shown in other embodiments herein (for example camera  526  in  FIG. 9 ). Arm housing  476  substantially defines the arm portion of boom  414  and can include touch-based input  470 , which can be a discrete element or can be an operable surface  474  of housing  452 , as described above. In an embodiment, the display portion  475  and arm portion  476  of housing  452  can be covered by a compliant outer layer (not shown). This outer layer can be made from a rubber material, for example, and can cover any joint between the two housing portions to give boom  414  a clean and uniform look. A rotating joint between display portion  475  and arm portion  476  can be used and can be formed by a separate element such as a pin or by integrally-formed features such as a post and a mating hole that can snap together. Additionally, an armature wire, a gooseneck feature, or a ball-and-socket joint can be assembled between the display portion  475  and the arm portion  476  to allow adjustment along additional axes. Such joints can also be covered by a compliant outer layer. 
     In this embodiment, display housing  475  can be rotatably affixed to arm housing  476 . Boom  414  can then be attached to frame  412  by any structure discussed herein. The rotation of display housing  475  can implement an additional or alternative form of adjustment for the position of display  454  relative to the user&#39;s eye. As shown in  FIG. 7B , display housing  475  can be rotated upward relative to arm housing  476 . Further, as shown in  FIG. 7C , display housing  475  can be rotated downward relative to arm housing  476 . In an embodiment, the point of rotation  484  between display housing  475  and arm housing  476  can be positioned near the focal center of a user&#39;s eye. This can be approximated based on predetermined non-adjustable attachment structures on bands of varying sizes, as discussed above, or can be done though forward- and backward-adjustable attachment structures, such as those described above with respect to  FIGS. 10-12 . 
     As shown in  FIGS. 8A-B , in certain structures of display  454 , such as certain display configurations (including the use of some types of prisms), it can be beneficial to orient display  454  such that viewing surface  460  is normal to a line from the image location within display  454  to the focal center of the user&#39;s eye. By allowing rotation of display housing  475  and, thus, display  454  to rotate relative arm housing  476 , the display  454  can be positioned in an optimal angle for viewing by users with different facial structures and different preferences for the horizontal or vertical position of display  454  or frame  412 .  FIG. 8A  shows display  454  at a location above the horizontal center  492  of the user&#39;s eye  490 . Display  454  is pivoted or otherwise rotated about axis  484  that extends in a lateral direction relative to the user&#39;s face (in and out of the page of  FIG. 8A ) such that surface  460  is perpendicular to a line  494  extending between surface  460  and the focal center  496  of the user&#39;s eye  490 . It is noted that the diagram shown in  FIG. 8A  is only an example and different users can have different locations of their eye&#39;s focal center.  FIG. 8B  shows display  454  positioned vertically near the horizontal center  492  of the user&#39;s eye with display rotated accordingly for optimal viewing by the user, as described above. 
     This adjustment can be such that the user can wear frame  412  on his or her head in a comfortable position and can then make adjustments to place display  454  in a desired or appropriately functional position. For example, the user may desire to position display directly in her line of sight (both vertically and horizontally) or may desire to have display  454  positioned above, below, or to the outside of his line of sight. Such positioning may vary depending on how the user is using device  410 , making on-the-fly adjustments useful for some applications. In other embodiments, discussed below, such adjustment can be made within the attachment between the boom and the frame, while still permitting similar adjustments. 
     Additional input structures can be included in device  410 . These can include a camera  426  and a sensor  428 , as shown in  FIG. 5 . The camera can be used to take picture or record a video at the user&#39;s discretion. The camera can also be used by the device to obtain an image of the user&#39;s view of his or her environment to use in implementing augmented reality functionality. The sensor  428  can be, for example a light sensor that can be used by firmware or software associated with the camera  426 . As shown in  FIG. 5 , the camera  426  and sensor  428  can be included in a secondary module  432  that is affixed to the arm  440 B opposite the arm  440 A to which boom  414  is affixed. In the example show in  FIG. 5 , secondary module  432  can be similar in appearance to boom  414  but lacking display  454  and not extending outward over the adjacent lens  418 . Secondary module  432  can extend rearward of lens  418  in similar manner to arm portion  476  of boom  414 . Further, secondary module  432  can include another touch-based input surface similar to that of boom  414 . Secondary module  432  can connect with boom  414  or other structures within device  410  through embedded wiring or circuitry within frame  412  or the like. Embodiments that include a removable boom  414  or secondary module  432  can include attachment features to facilitate removable electronic connection with such wiring or circuitry. In other embodiments (such as that shown in  FIG. 9 ), a camera  726  can be included in frame  712 , such as in nosebridge  720 . 
     In an embodiment, both boom  414  and secondary module  432  can be removably affixed on arms  440 A and  440 B such as by incorporation of mutually-engaging snap fit or press fit features. Such an arrangement can allow a user to exchange the sides to which the boom  414  and secondary module  432  are respectively attached. This can be useful to those who prefer display  454  to be positioned over a particular eye (right or left). For example, a right-handed person may prefer having the boom  414  on the right side of her head to make interaction with touch-based input  470  easier. In another example, a person may prefer to have the display  454  over a dominant eye for easier interaction with elements presented on display  454  or over a non-dominant eye to make it easier to shift his focus away from elements presented on display  454  when engaged in other activities. Both boom  414  and secondary module  432  can be configured to be symmetrical along a horizontal plane (relative to the general position of boom  414  when assembled with frame  412  and with assembly  410  being worn by a user) such that, for example, boom  414  can be rotated along the longitudinal axis of arm  476  to appropriately position display  454  inward of arm  476  and over the desired eye of the user. In such an arrangement, boom  414  and module  432  can each have an attachment structure that is vertically centrally located on arm  476  such that it can be reached by a corresponding attachment feature of frame  412  from either side thereof. Alternatively, boom  414  and module  432  can each include multiple attachment features in appropriate locations to make the desired attachment with frame  412  on either arm  440 A or  444 B. Frame  412  can also include attachment features, as will be discussed below, on both arms  440 A and  440 B to accommodate positioning of boom  414  on either side thereof or on one of arms  440 A or  440 B such that a particular frame  412  is designated as being right-side or left-side boom attachment. 
     In a further arrangement, two booms could be included, with one affixed on each arm  440 A and  440 B of frame  412  and corresponding to each eye of the user. As a further alternative, a single display  454  could be used with a prism or other structure configured to extend over both eyes of the user for displaying an image viewable by both eyes. 
     As mentioned previously, housing  452  can contain electronic circuitry such as the circuitry for touch based input  470 . In addition housing  452  can include control circuitry for the image source associated with display  454 , the camera  426 , or the sensor  428 , or one or more circuit boards including a processor to control display  454 , touch based input  470  or to perform other functions for boom  414 . Housing  452  can further include a power source, such as a battery to power the other circuitry. Additionally housing  452  can include memory, a microprocessor or communications devices, such as cellular, short-range wireless (e.g. Bluetooth), or WiFi circuitry for connection to a remote device. Additionally, any such circuitry can be included in band  414  such as in at least one of the earpieces  446 , for example in an internal cavity thereof. 
     As shown in  FIG. 9 , earpiece  546  can be configured to be positioned behind or over the ear of the user while being worn. Earpiece  546  can be further configured to contact a portion of the user&#39;s head to help secure the position of device assembly  510 . Earpiece  546  can be configured to include a battery or multiple batteries of various forms, such as AAA, AA, or 9-volt style batteries. The battery can also be a rechargeable battery such as a lithium-ion or nickel-cadmium battery and can be removable by the user or can be permanent or semi-permanent. Earpiece  546  can also include a port (not shown) that can be used to connect device assembly  510  to a power source to recharge a battery without removal thereof or to connect device  510  to a remote device for communication therewith, such as described above, or to update or install software or firmware included in the memory of device  510 . 
     Earpieces  546  can be integrally formed with arms  540 A, 540 B or can be separate elements that can be pre-assembled with arms  540 A, 540 B. Alternatively, a number of different earpieces  546  can be provided that can be removably attached to ends  544  of arms  540  according to fit or the user&#39;s preferences. In such configurations, earpieces  546  can be made of different materials or material combinations than the remainder of band fame  512 . 
     Earpiece  546  can be configured and positioned to provide a balancing weight to that of boom  514 . Boom  514  is positioned forward of the user&#39;s ear, which can cause a portion of its weight to be supported by the nose of the wearer. By adding weight behind the user&#39;s ear (or shifting weight to behind the user&#39;s ear by relocating components) in the form of earpiece  546 , the ear becomes a fulcrum about which the weight of boom  514  is balanced against that of the earpiece  546 . This can remove some of the weight on the user&#39;s nose, giving a more comfortable, and possibly a more secure fit with reduced potential slipping of bridge  520  downward on the user&#39;s nose. The components within earpiece  546 , such as a battery or various control circuitry can be arranged to contribute to a desired weight distribution for device  510 . For example, heavier components, such as a battery, can be placed toward or away from boom on arm  540 A to adjust the weight distribution. In an embodiment, a majority of the weight can be carried by the ear of the user, but some weight can still be carried by the nose in order to give the device a secure feel and to keep the bridge  520  in a desired position on the nose to maintain a desired position for display  454 . In an embodiment, between 55% and 90% of the weight of device assembly  510  can be carried by the user&#39;s ear or ears. In some embodiments, it may be desired to have a comparatively greater portion of the weight borne by the user&#39;s nose. For example, the weight balancing can be configured such that between 40% and 75% of the weight of device  510  is applied to the user&#39;s nose. Further, in embodiments such as that shown in  FIG. 9 , the presence of boom  514  on one side of the user&#39;s head can create an unbalanced side-to-side weight distribution. In the embodiment of  FIG. 5 , the presence of secondary module  432  can create a more balanced side-to-side weight distribution. However, in unbalanced arrangements such as that of  FIG. 9 , it may be advantageous to have one of the earpieces  546  be heavier than the other. For example, in the embodiment shown, where boom  514  is affixed on arm  540 A, it may be advantageous for the earpiece  546  on that same arm to be heavier than the opposite earpiece  546 . 
     In the embodiment shown in  FIGS. 10-12 , frame  612  is of a configuration that includes separate assemblies  617 A, 617 B of a lens  613 A, 613 B surrounded by a corresponding rim  630 A, 630 B and having a bridge arm  622  attached thereto for supporting and appropriately positioning a pad  624 . Each of these assemblies  617 A, 617 B are configured to assemble with a band  613  including a central portion  631  having arms  640 A, 640 B extending from opposing sides thereof. Boom  614  is affixed to either one of the arms  640 A or  640 B to position display  650  in the view of one of the user&#39;s eyes, as discussed above with respect to  FIG. 5 . Lens assemblies  617 A, 617 B can attach to central portion  631  by various snap-fit or press-fit arrangements or can be removably affixed using screws or the like. Band  613  can be configured to fit on the head of a user with central portion  631  positioned over the brow of the user and supported in a position thereover by pads  624  that contact the nose of the wearer. In such a configuration, device  610  can be used and worn without lens assemblies  617 A, 617 B assembled therewith. Without lens assemblies present, device  610  can be worn such that central portion  631  of band  613  makes contact with at least a portion of the user&#39;s brow or forehead to appropriately support and position display  650 . Alternatively, a nosebridge assembly (not shown) can be assembled to central portion  631  of band  613  to allow band  613  to be supported by the nose of the user with no lenses present. 
     Band  613  can be of a flexible construction to bend in response to different head shapes. Band  613  can be made from a resiliently flexible material or combination of materials. Such a construction can permit arms  640 A, 640 B, including ends  644  thereof to flex outwardly away from each other to accommodate heads of different sizes. Further, the structure can be configured so that at a resting, or un-flexed, position (such as when not being worn) band  613  is somewhat smaller than necessary to accommodate the smallest size head for which band  613  is configured. This may require some degree of flexing by band  613  when worn, resulting in band  613  applying a force against the user&#39;s head due to its tendency to return to its undersized resting position. Such a force can help retain band  613  on the user&#39;s head, with or without the further retention provided by earpieces  646 . At least a portion of the arms  640 , such as the areas thereof that make contact with the user&#39;s head, can be made from or otherwise coated with a rubber or another high-friction material. The use of rubber or the like in these contact areas can also increase the comfort to the user by spreading out the contact more evenly. Such a structure can achieve at least three points of contact with the user&#39;s head, which can give a desired level of stability to the device  610 , when worn. 
     As shown in  FIG. 10 , device  610  has a band  613  that includes a compliant inner portion  638  and a resilient outer portion  648 . This arrangement is further illustrated in the exploded view of  FIG. 12 . Inner portion  638  can include any portions of the band  613  that are intended to contact the user&#39;s head. In the particular embodiment shown, inner portion  638  can define the entire inner surface  639  of band  613  to ensure that the compliant material of inner portion makes contact with the user&#39;s head regardless of the area of band  612  along which contact is made with the user&#39;s head. Inner portion  638  can be made of any material that can provide a degree of compliance to enhance the comfort of the fit of band  612  on the user&#39;s head while being able to retain its general shape. Acceptable materials include various foams, such as foam rubber, neoprene, natural or synthetic leather, and various fabrics. In an embodiment, inner portion  638  is made from an injection-molded or cast TPE. The compliance of the material of inner portion  638  can be measured by the durometer of the material. In an example, inner portion  638  can be made from TPE having a durometer of between 50 and 70. Inner portion  638  can also be formed having a hollow passage therethrough or a channel formed therein opposite inner surface  639 . Such a passage or channel can be used to route any wiring associated with boom  614 . For example, in an embodiment a battery (not show) can be housed in one of the earpieces  646  of frame  612  that can be connected with the internal components of boom  614  to provide power therefor. This connection can be made by wired routed through a channel or hollow passage through inner portion  638 . 
     Outer portion  648  of band  613  can be made of a resiliently flexible material such as metal or plastic. In general, the nature of such a material should be such that outer portion  648  can maintain the desired shape for band  613  while allowing some flexibility so that band  613  can expand to fit on a user&#39;s head while applying a comfortable pressure thereto to help retain band  613  on the user&#39;s head. In some embodiments, outer portion  648  can be elastically deformable within a range that will allow it to be worn as such on a user&#39;s head and plastically deformable above the elastically deformable range to allow the user to make adjustments to the shape of band  648 . In other embodiments, outer portion  648  is elastically deformable up to a sufficiently high threshold that a user is sufficiently unable to permanently alter the shape of band  613 . Acceptable materials for outer portion  648  include metals such as aluminum, nickel, titanium (including grade  5  titanium), various steels (including spring steel, stainless steel or the like), or alloys including these and other metals. The thickness of outer portion  648  can be adjusted, depending on the material used, to give the desired flexibility characteristics. 
     As shown in the exploded view of  FIG. 12 , (which also illustrates an alternative example having two earpieces  646 , one on each end  544  of the respective arms  640 A, 640 B) inner portion  638  can have a profile such that it at least partially fits within a channel  649  formed by outer portion  648 . In the example shown, inner portion  638  can be sized to fit within channel  649  along a relatively narrow portion thereof opposite inside surface  639 . Inner portion  638  can then extend inward past outer portion  648  and can be relatively wider along such a portion, which can include inner surface  639 . Channel  649  can be configured to also accept any wiring of band  612  therein or to close a partially open channel formed in inner portion  639  to hold such wiring. 
     Further, earpieces  646  can be integrally formed with inner portion  638  and can extend beyond ends  644  of outer portion  648 . In these embodiments, inner portion  638  can include internal support within the portions thereof that form earpieces  646 . Such internal support can include electronics housings that can contain batteries or other electronic circuitry associated with device  610 . The internal support can also include resilient members such as spring elements (not shown) to help provide flexion of band  613  and retention pressure against a wearer&#39;s head. Such spring elements can also be plastically deformable to allow for user adjustment of the earpieces  646 . Lengths of armature wire can be used to provide such characteristics. Any internal support within earpieces  646  can extend into the area of inner portion  638  that is within outer portion  648  to provide additional support therefor. 
     As shown in  FIG. 11 , boom  414  can be configured to attach to band  613  such that boom  614  is positioned beneath band  612  when in a position as when worn on a user&#39;s head. This configuration can be advantageous due to the relative positions desired for display  654  and central portion  631  of band  613 . In particular, with central portion  631  in a position over the brow of the user, it may be desired to have display  654  positioned vertically below central portion  630  such that it is in at least a portion of the user&#39;s line of sight. Accordingly, in an embodiment this positioning is achieved by attaching boom  614  to band  613  such that boom  614  is beneath band  613 , with exception made for any interacting attachment elements of band  613  or boom  614 . Other arrangements are possible, such as boom  614  attaching to band  613  in an overlapping manner, with boom  314  positioned to the outside of band  613  at the point of attachment. 
     As shown in  FIG. 11 , the attachment feature  632  of band  613  includes a track  636  that extends along a length of arm  640 A (a similar feature can also or alternatively be positioned on arm  640 B). Boom  614  includes an attachment feature  662  including a screw  666 , the shank of which fits securely within track  636  with the head of screw  666  extending outward along the body of the attachment feature  632 . In such an arrangement, boom  614  can be affixed to attachment feature  632  using screw  666  such that boom  614  can be moved forward and backward relative to band  613  by sliding screw  666  within track  636 . Screw  666  can then be tightened into housing  652  to secure the position of boom  614  relative to band  612 . Such adjustment can provide various forms of “eye relief” such as by compensating for different eye positions such as for users with deep-set eyes or with eyes positioned relatively close to brow. 
     Additionally, the eye relief provided by the forward and backward adjustability of attachment  632  can allow display  654  to be positioned clear of the user&#39;s eyelashes including those of users with relatively long eyelashes. Screw  666  can then be tightened into housing  652  to secure the position of boom  614  relative to band  612 . Housing  652  can be configured to permit some rotation of boom  614  relative to attachment portion  632  such that the rotational position of boom  614  can also be fixed by tightening screw  666  into housing  652 . This attachment can also incorporate a spring (not shown) or the like positioned between housing  652  and attachment feature  632  such that boom  614  is biased away therefrom. This can allow the lateral position of boom  614 , and thus display  654 , to be adjusted by tightening screw  666 , which can draw housing  652  closer to attachment feature  632 . In either arrangement, boom  614  can be disassembled from band  613  by loosening screw  666  until it is removed from housing  452 . Other, similar arrangements are possible, including sliding joints such as dovetails or the like, which can be locked in place using set screws or the like. 
     Track  636  can include conductive features such as exposed wire segments or traces partially embedded therein that can align with further conductive features positioned on housing  652  of boom  614  to allow connection between electronic elements in the band  612  and the electronic components (including the image source or touch-based input  670 ) in boom  614 . In other embodiments, an external wire (not shown) can extend out from band  613  and plug into an outlet (not shown) on boom  614  to achieve a desired electrical connection therebetween. Band  613  can include additional wires that run through at least a portion thereof to further connect such components that may be located remotely from each other. 
     In a commercial setting, a number of different bands  613  can be provided that are configured to fit different ranges of head sizes, such as “small”, “medium”, and “large”. These can be provided with a boom  614  that is configured to attach to each of the differently-sized bands in a desired manner and a pair or pairs of lens assemblies  617 . Alternatively booms  614 , lens assemblies  617 , and differently-sized bands  613  can be sold separately, allowing a purchaser to select the desired band and a boom to assemble together, with or without lens assemblies. In an example, lens assemblies can be sold with lenses according to a user&#39;s prescription or can be tinted in the form of sunglasses. Bands  613  in such a setting can also be provided in different fit styles (such as with earpieces or without or in varying shapes) or colors to allow further purchaser customization. 
     Additional components can be included in the various device assemblies described herein. These components can include additional inputs, control circuitry boards, antennae or the like. The various locations in which these additional components are located on or in such a device assembly can also be selected to allow for a predetermined weight distribution. 
     Although the description herein has been made with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present disclosure. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present disclosure as defined by the appended claims.