Patent Publication Number: US-11656532-B2

Title: Cylindrical camera dual leaf shutter

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     U.S. Patent Application No. 17,349,396, filed Jun. 16, 2021, entitled “Cylindrical Camera Rotating Cap Shutter Mechanism with Enhanced Audio Security” by inventors Peng Lip Goh, Celia Law, and Deeder M. Aurongzeb, filed on even date herewith, describes exemplary methods and systems and is incorporated by reference in its entirety. 
     U.S. patent application Ser. No. 17/349,402, filed Jun. 16, 2021, entitled “Peripheral Camera and Information Handling System Security System and Method” by inventors Peng Lip Goh, Celia Law and Deeder M. Aurongzeb, filed on even date herewith, describes exemplary methods and systems and is incorporated by reference in its entirety. 
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates in general to the information handling system cameras, and more particularly to an information handling system cylindrical camera dual leaf shutter. 
     Description of the Related Art 
     As the value and use of information continues to increase, individuals and businesses seek additional ways to process and store information. One option available to users is information handling systems. An information handling system generally processes, compiles, stores, and/or communicates information or data for business, personal, or other purposes thereby allowing users to take advantage of the value of the information. Because technology and information handling needs and requirements vary between different users or applications, information handling systems may also vary regarding what information is handled, how the information is handled, how much information is processed, stored, or communicated, and how quickly and efficiently the information may be processed, stored, or communicated. The variations in information handling systems allow for information handling systems to be general or configured for a specific user or specific use such as financial transaction processing, airline reservations, enterprise data storage, or global communications. In addition, information handling systems may include a variety of hardware and software components that may be configured to process, store, and communicate information and may include one or more computer systems, data storage systems, and networking systems. 
     Information handling systems often interact with peripheral devices, such as keyboards, mice and cameras. Cameras are typically used to support videoconferences in which visual images captured by cameras are exchanged so that end users can communicate while viewing each other. Typically, videoconferences are performed with cameras that have relatively low resolution. The use of low resolution is driven in part by the amount of bandwidth consumed by communication of video information. In addition, low resolution is driven by the footprint of typical Web cameras, which generally do not have the size to support high quality lenses. For example, cameras integrated in portable information handling systems tend to have a restricted focal length due to the thickness of typical portable information handling system housings. Peripheral Web cameras typically have a larger footprint so that higher quality lenses may be included that capture higher resolution visual images than integrated cameras. Generally, even with larger housing footprints, Web cameras tend to limit resolution to High Definition visual images as Ultra High Definition or 4K cameras and have large bandwidth demands. 
     Recently, enterprises have experienced an increased reliance on videoconferences to interact internally between employees and externally with customers and vendors. Although lower-resolution Web cameras are sufficient for many daily uses, in many situations, higher quality video images are desired. For instance, in conferences that involve senior executives or high government officials, higher resolution video images are generally desired. Often, such high level conferences are done from large conference rooms and involve a number of participants. Generally, high resolution cameras with high quality lenses offer a number of advantages in such scenarios. One advantage is that greater focal length will allow one camera to provide high quality video images at different ranges through zoom functionality. Another advantage is that higher resolution offers greater flexibility for digital zoom, pan and tilt functions, such as by cropping an image to capture a participant with a close-up view. When a camera provides higher resolution visual images, a number of additional integrated functions may be provided at the camera, such as artificial intelligence analysis that aids with facial recognition and gesture inputs. For example, processing resources added to the camera monitor visual information for desired attributes that are reported to the information handling system, such as an end user&#39;s identity. 
     One difficulty with including higher resolution capability in a peripheral Web camera is that additional interior room generally needed for higher resolution and greater integrated intelligence can result in awkward form factors with unsatisfactory aesthetics, particularly when used in profile video conferences. Assembly of the camera to include high resolution lenses and additional processing components can result in a complex internal arrangement that does not readily fit into smaller form factors. For instance, an external housing of the camera tends to include screws and other assembly mechanisms that are visible to the end user. Assembly of a camera in a housing can affect how the lens captures visual images and the size of the housing. For example, to achieve a desired field of view for a lens, the size of the housing generally must increase as the lens distance to a front glass of the housing increases. However, compressing a lens up close to a housing front glass can be difficult where the camera includes a front shutter as the front shutter mechanism tends to consume areas at the front face of the housing. The greater the size of the front shutter, the larger dimension needed for the camera housing to get the desired field of view. 
     Another difficulty that can arise with peripheral camera is that a front shutter that offers enhanced security is not controlled in a coordinated manner with an information handling system&#39;s operation. For example, cameras integrated in information handling system housings often include manual shutters that an end user may slide over the camera lens to prevent unauthorized access to the camera. In some systems, an automated shutter may be used so that the camera lens is blocked when the camera is not in use and opened when an end user initiates a camera function. Peripheral cameras typically interface through a cable, such as a USB cable, so that camera security more typically amounts to an end user unplugging the camera when not in use. Other functions associated with a peripheral camera may include a microphone to capture audio and an infrared camera to provide depth information. If a peripheral camera remains connected to an information handling system and powered up without covering the camera at the front, an unauthorized user may be able to obtain access to visual information and also depth and audio information. 
     SUMMARY OF THE INVENTION 
     Therefore, a need has arisen for a system and method which integrates a lens cover in a peripheral camera with minimal impact on camera housing dimensions. 
     A further need exists for a system and method that manages peripheral camera and information handling system security. 
     In accordance with the present invention, a system and method are provided which substantially reduce the disadvantages and problems associated with previous methods and systems for assembly of a peripheral camera in a housing and interactions of a peripheral camera with an information handling system. A shutter integrates in a front face of a peripheral camera to selectively block visual images captured by the camera, such as with dual leaf cover members that rotate over the camera or shutter members that extend and retract with rotation of a cap coupled to the camera front face. Security may be enhanced with selective mechanical blocking of camera functions, such as depth images, user presence detection and audio capture, which are coordinated with an information handling system interfaced with the display for a peripheral display viewing position. 
     More specifically, an information handling system having a processor and memory interfaces with a peripheral camera that captures visual images to support video conferences. The peripheral camera is assembled into a cylindrical housing having a shutter at the front face to mechanically block a camera module from capturing visual images. In one embodiment, the shutter has opposing dual leaf cover members that rotate over the camera module to block capture of visual images and to opposing sides of the camera module to allow capture of visual images. Cover member rotation is coordinated with gears that engage at the rotation point and interface with an actuator, such as a step motor or a piezoelectric element. In an alternative embodiment, shutter members extend and retract over the camera module by interaction of a rotationally coupled cap of the camera and a static shutter plate disposed around the camera module that includes guides to define shutter member movement. In various embodiments, different camera function availability is managed based upon shutter position, such as by selectively covering and uncovering an infrared camera, a microphone and a user presence detection sensor based upon alignment of openings in the cap and the functional components disposed in the camera housing. A security module executing on a processing resource with the peripheral camera monitors context, such as with user presence and infrared images, to manage security of the peripheral camera as well as visual images presented at a peripheral display interfaced with an information handling system of the peripheral camera. 
     The present invention provides a number of important technical advantages. One example of an important technical advantage is that a peripheral camera integrates in a cylindrical housing a shutter that efficiently uses space to minimize the distance between a camera module disposed in the cylindrical housing and a front glass disposed over the cylindrical housing front face. Proximity of the camera module to the front glass provides an increased field of view for the camera module within a smaller diameter cylindrical housing. The camera module is mechanically blocked from capture of visual images to provide enhance security for an end user of the peripheral camera. In addition, an infrared camera and microphone may be selectively blocked to prevent unauthorized access, such as by a remote hacker. In one embodiment, a security module executing on a processing resource within the peripheral camera manages selective exposure of camera functions to prevent unauthorized camera access as well as to provide enhanced security for an information handling system interfaced with the peripheral camera. For instance, the peripheral camera monitors a peripheral display visual presentation zone to manage security of presented visual images by commanding adjustments to presented visual images based upon sensed context at the peripheral display. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention may be better understood, and its numerous objects, features and advantages made apparent to those skilled in the art by referencing the accompanying drawings. The use of the same reference number throughout the several figures designates a like or similar element. 
         FIG.  1    depicts a block diagram of an information handling system interfaced with a peripheral camera that supports videoconferencing; 
         FIGS.  2 A,  2 B,  2 C,  2 D and  2 E  depict a dual leaf camera security system for selectively blocking and providing access to a camera module disposed in a camera housing; 
         FIG.  3    depicts a front perspective view of an alternative embodiment of cover members configured for automated and manual actuation; 
         FIG.  4    depicts a rear inner view of the dual leaf cover members disposed behind the bezel; 
         FIGS.  5 A and  5 B  depict the peripheral camera bezel rear side with a piezoelectric actuator coupled to a cover member gear for moving the cover members between open and closed positions; 
         FIGS.  6 A,  6 B,  6 C, and  6 D  depict an alternative embodiment of a camera that selectively covers a camera module with shutter members; 
         FIGS.  7 A and  7 B  depict an exploded view of an embodiment that covers a camera module with shutter members; 
         FIG.  8    depicts a rear view of a circular cap having an actuator adapted to provide automated access to different camera functions; 
         FIGS.  9 A and  9 B  depict a rear view of the circular cap configured with a piezoelectric actuator to provide automated access to different camera functions; 
         FIGS.  10 A and  10 B  depict an example embodiment of a front face of the circular cap illustrating underlying camera functions covered and uncovered; 
         FIG.  11    depicts a flow diagram of a process for managing security at completion of a usage session with a peripheral camera; 
         FIG.  12    depicts a flow diagram of a process for managing security at initiation of a usage session with a peripheral camera; 
         FIG.  13    depicts a block diagram of a peripheral camera configured to support security at a peripheral display interfaced with an information handling system to present visual images; 
         FIG.  14    depicts a flow diagram of a process for managing display privacy with a peripheral camera; 
         FIG.  15    depicts an example of security analysis by sensing context with a peripheral camera; and 
         FIG.  16    depicts a flow diagram of a process for selective activation of peripheral camera functions to provide security at a peripheral display. 
     
    
    
     DETAILED DESCRIPTION 
     An information handling system peripheral camera secures against unauthorized access of camera resources by selectively covering camera and microphone resources and by monitoring end user interactions at an associated peripheral display to detect unauthorized access to visual information. For purposes of this disclosure, an information handling system may include any instrumentality or aggregate of instrumentalities operable to compute, classify, process, transmit, receive, retrieve, originate, switch, store, display, manifest, detect, record, reproduce, handle, or utilize any form of information, intelligence, or data for business, scientific, control, or other purposes. For example, an information handling system may be a personal computer, a network storage device, or any other suitable device and may vary in size, shape, performance, functionality, and price. The information handling system may include random access memory (RAM), one or more processing resources such as a central processing unit (CPU) or hardware or software control logic, ROM, and/or other types of nonvolatile memory. Additional components of the information handling system may include one or more disk drives, one or more network ports for communicating with external devices as well as various input and output (I/O) devices, such as a keyboard, a mouse, and a video display. The information handling system may also include one or more buses operable to transmit communications between the various hardware components. 
     Referring now to  FIG.  1   , a block diagram depicts an information handling system  10  interfaced with a peripheral camera  36  that supports videoconferencing. In the example embodiment, information handling system  10  processes information with processing components disposed in a housing  12 . For example, a central processing unit (CPU)  14  executes instructions that process information with the instructions and information stored in a random access memory (RAM)  16 . An embedded controller  18  manages physical operating conditions within housing  12 , such as application of power and maintaining thermal constraints, and also manages interactions with peripheral devices, such as a keyboard and mouse. A graphics processing unit (GPU)  20  interfaces with CPU  14  and further processes the information to generate visual images, such as by generating pixel values that define pixel colors for presentation at display  34 . A solid state drive (SSD)  22  provides non-transitory memory, such as flash, that stores information during system power down states. For example, the instructions may include an operating system  24  stored in SSD  22  and retrieved to RAM  16  with boot code executed on embedded controller  18  at system power up. 
     GPU  20  interfaces through a display port  32  and display cable  42  with a display  34  that presents information as visual images, such as by scanning pixel values to a display panel having rows and columns of pixels. In the example embodiment, a first peripheral camera  36  is illustrated in two different positions relative to display  34 . A bracket  38  couples camera  36  to an upper side of display  34  to capture visual images of an end user viewing display  34 . A second peripheral camera  36  rests on a tripod  40  to capture visual images of an end user viewing the display from a location in between the end user and the display. Multiple viewing locations for camera  36  provides an end user with increased flexibility regarding the quality of a visual image captured by camera  36 . As is described below in greater detail, camera  36  may selectively detach and attach from each of bracket  38  and tripod  40 , such as with a magnetic coupling device, as described in U.S. patent application Ser. No. 17/325,503, filed May 20, 2021, by Celia Law et al., which is incorporated herein as if fully set forth. Camera  36  captures visual images and communicates the visual images through a USB cable  30  and to a USB port  28  for use by information handling system  10 , such as to support a videoconference. In the example embodiment, a camera manager  26 , such as driver of operating system  24 , provides a camera interface  27  for presentation at display  34  to manage camera settings and present visual images captured by camera  36 . 
     Referring now to  FIGS.  2 A,  2 B,  2 C,  2 D and  2 E , a dual leaf camera security system is depicted for selectively blocking and providing access to a camera module disposed in a camera housing.  FIG.  2 A  depicts a front view of camera  36  disposed in a cylinder housing  44  to expose a camera module  46  that captures visual images, such as to support a videoconference. In the example embodiment, a bezel  52  covers the end of cylindrical housing  44  and has a central opening through which camera module  46  is exposed to capture visual images. Bezel  52  has a user presence detection sensor  48  exposed through an upper opening that detects end user presence, such as a time of flight sensor that detects end user presence with infrared light reflections or an ultrasound sensor that detects end user presence with Doppler effects for reflected sound energy. Bezel  52  has an infrared camera  50  exposed through a lower opening that provides depth camera functions, such as by emitting infrared illumination that reflects from targets to a camera that senses the infrared spectrum to measure distance. For example, infrared camera  50  supports facial recognition based upon depth measurements of a face in its field of view. As is set forth in greater detail below, user presence determinations and facial recognition are performed with a processing resource integrated in camera  36  and then communication to an information handling system interfaced with camera  36 . 
     To provide security against unauthorized capture of visual images by camera module  46 , first and second opposing cover members  56  rotationally couple to bezel  52  at a lower position below infrared camera  50 . Each cover member  56  rotationally couples at a gear end terminating with gears  60  and extends to a cover end  58  having a semicircular shape, each semicircular shape having a radius substantially equal to the radius of the camera module  46  opening so that rotation of the cover ends  58  to meet over camera module  46  blocks capture of visual images by camera module  46 . Gears  60  of each cover member  56  engage to coordinate opening and closing of cover members  56 . In the example embodiment, magnets  62  disposed in one cover member  56  provide and indication of cover member position, such as to a Hall sensor disposed in cylindrical housing  44 . A ferromagnetic material  64 , such as steel, is attracted to magnet  62  to aid in holding cover ends  58  together when positioned over camera module  46 . Bezel  52  has a beveled region  54  that helps to guide movement of cover members  56  between an open position that exposes camera module  46  and a closed position that blocks camera module  46 . 
       FIG.  2 B  depicts camera  36  with cover members  56  rotated about gears  60  to move cover ends  58  over camera module  46 . In the closed position, cover members  56  also cover infrared camera  50  to prevent unauthorized access; however, user presence detection sensor  48  remains exposed at bezel  52  so that camera  36  may be leveraged by an interfaced information handling system to monitor user presence and absence.  FIG.  2 C  depicts an inner rear view of bezel  52  showing alignment of camera module  46  with the bezel camera opening. An actuator  68 , such as a step motor, interfaces with one of the gears  60  to turn the gear for opening and closing cover members  56 . A Hall sensor  66  couples to the beveled region  54  to detect magnets  62  for feedback of the cover member  56  position so that actuator  68  opens and closes a desired amount. In the example embodiment, a cover end  58  may include multiple magnets  62  to provide a signal for actuator  68  control at both the open and closed positions. In an alternative embodiment, multiple Hall sensors may be disposed at the rear side of bezel  52  to further define the position of cover members  56 .  FIG.  2 D  depicts a rear inner close up view of actuator  68  coupled to gear  60  to turn gear  60  so that cover members  56  open and close.  FIG.  2 E  depicts a front close up view of cover member gears  60  engaged and rotated by actuator  68  to a closed position. 
     Referring now to  FIG.  3   , a front perspective view depicts an alternative embodiment of cover members  56  configured for automated and manual actuation. In the example embodiment, a circular frame cap  74  rotationally couples over bezel  52  and interfaces with a manual actuation gear  72  so that, as circular frame cap  74  rotates gear  72  also rotates. Rotation of gear  72  translates to gears  60  so that rotation of circular frame cap in opposing directions opens and closes cover members  56  to place cover ends over camera module  46  or to opposing sides as defined by beveled region  54 . 
     Referring now to  FIG.  4   , a rear inner view depicts the dual leaf cover members  56  disposed behind bezel  52 . In the example embodiment, rotationally coupling each gear  60  end of the cover members  56  at an interior rear side of bezel  52  hides the cover ends of cover members  56  when not extended over camera module  46 . A frame  70  couples around camera module  46  and to the rear side of bezel  52  to hold cover members  56  in place and gears  60  engaged with actuator  68 . A magnet  62  couples to one of the cover members  56  to support a Hall sensor detection of cover member position, as described in greater detail above. One advantage of rear mount of cover members  56  is that the beveled region is eliminated from the front of bezel  52  to provide a cleaner appearance. In one alternative embodiment, a beveled region may be formed on the rear side of bezel  52  to help guide motion of cover members  56  between the open and closed positions. 
     Referring now to  FIGS.  5 A and  5 B , the peripheral camera bezel  52  rear side is depicted with a piezoelectric actuator  76  coupled to a cover member gear  60  for moving the cover members between open and closed positions. Piezoelectric actuator  76  relies upon a piezoelectric effect to generate a vibration that translates to movement gear  60 . For example, a ceramic AE series resin coated piezoelectric actuator by KEMET, a YAGEO company may be used. As illustrated by  FIG.  5 B , a piezoelectric element  80  has a gear pin cap  78  coupled at an end and engaged with a gear  60  so that actuation with current from wires  82  and  84  provide a rapid pushing and pulling action that rapidly rotates gear  60  to open and close the cover members. The vibration translates to gear pin cap  78  to slightly lift the end of the pin over the individual gears, resulting in rapid actuation of gear  60  in open or close directions. 
     Referring now to  FIGS.  6 A,  6 B,  6 C, and  6 D , an alternative embodiment of a camera  36  is depicted that selectively covers a camera module  46  with shutter members  96 .  FIG.  6 A  depicts camera  36  with a front bezel  52  having plural openings that each provide access to underlying functional devices. Camera module  46  has access to external light through a central opening, as described above. In addition, an LED opening  86  allows illumination to exit from behind bezel  52  and a microphone opening  88  provides access for sound energy to reach an audio microphone disposed behind bezel  52 . A cap  90  rotationally couples to a front face of camera  36  to rotate and allow selective opening and closing of the openings in bezel  52  relative to their underlying functions.  FIG.  6 B  depicts camera  36  with the front bezel removed to show an underlying shutter plate  98  coupled in a fixed manner relative to camera  36  and a front surface of cap  90  that includes a microphone opening  100  and LED opening  92 . Shutter members  96  couple to cap  90  and to shutter plate  98  so that rotation of cap  90  relative to fixed shutter plate  98  extends and retracts shutter members  96  relative to a central opening of cap  90  through which camera module  46  captures visual images.  FIG.  6 C  depicts cap  90  rotated relative to the underlying shutter plate and to bezel  52 , which has a fixed orientation relative to camera  36 . Rotation of cap  90 , in addition to extending and retracting shutter members  96 , aligns and misaligns openings  100  and  92  of cap  90  to openings  86  and  88  so that the LED and microphone functions are blocked from access through bezel  52 .  FIG.  6 D  depicts camera  36  with bezel  52  removed and shutter members  96  extended over the camera module. The openings  92  and  100  in cap  90  rotate as shutter members  96  extend while the underlying functions are provided by stationary components disposed on shutter plate  98 . 
     Referring now to  FIGS.  7 A and  7 B , an exploded view depicts an embodiment that covers a camera module  46  with shutter members  96 . In the example embodiment, camera cylindrical housing  44  is manufactured by extruding aluminum into a cylinder having open front and rear faces. A camera module  46  couples at the front face of housing  44  to capture visual images, such as that support videoconferences, and provides the visual images to internal processing resources for communication to an information handling system, as described in greater detail below. At the front face, a bezel  52  couples at a fixed orientation relative to housing  44 , such as with screws that pass through bezel  52 , through a support  106  and into threads of housing  44 . Bezel  52  may have a glass cover and can support a user presence detection sensor  48  at the front surface, such as a time of flight or ultrasonic Doppler sensor. Exposing user presence detection sensor  48  at a front surface allows constant monitoring of user presence even as the camera module and infrared camera operational states change. Support  106  fits around camera module  46  to provide a robust brace against torsional forces generated by shutter member  96  movement. In addition, support  106  has a circumference that avoids interference with movement of shutter members  96  within guides  102  of shutter plate  98 . 
     Circular cap  90  rotationally couples over the front face of housing  44  captured by the screws that couple bezel  52  to housing  44 . The screws pass through openings of circular cap  90  to define a degree of rotation of circular cap  90  relative to bezel  52  and housing  44 . The screws also pass through openings of shutter plate  98  to couple shutter plate  98  in a fixed location relative to bezel  52  and housing  44 . Circular cap  90  captures shutter members  96  against shutter plate  98  so that pins extending from the front side of each shutter member  96  rotationally couples to the rear side of circular cap  90  and a pin extending from the rear side of each shutter member  96  slidingly inserts into a guide of shutter plate  98 . As circular cap  90  rotates relative to shutter plate  98 , guides  102  drive shutter members  96  to travel over and away from the center opening of circular cap  90 . A microphone  104  couples shutter plate  98  to align with a microphone opening of circular cap  90  when shutter members  96  move away from the central opening and misalign with the microphone opening of circular cap  90  when shutter members  96  extend over the central opening to block camera module  46 . Mechanical blocking of microphone  104  when camera module  46  is blocked for security adds a layer of security against unauthorized access of microphone information when the camera is powered down. As is described in greater detail below, mechanical blocking and access of camera module  46 , microphone  104 , an infrared camera and a user presence detection sensor may be individually managed based upon the size and relationship of openings in circular cap  90  to provide secure access with the camera. 
     Referring now to  FIG.  8   , a rear view of a circular cap depicts an actuator adapted to provide automated access to different camera functions. In the example embodiment, actuator  68  engages with gears formed in the inner circumference of circular cap  90  to rotate circular cap  90  relative to the camera housing. Shutter plate  98  and support plate  106  remain stationary relative to the camera housing and step motor  68  so that the rotation of circular cap  90  causes the shutter members to extend and retract and also causes alignment and misalignment of microphone  104  with a microphone opening formed in circular cap  90 .  FIGS.  9 A and  9 B  depict a rear view of the circular cap configured with a piezoelectric actuator  76  to provide automated access to different camera functions. Piezoelectric element  80  has a gear cap  78  that vibrates responsive to current from wires  82  and  84  to engage gears  110  so that circular cap  90  is pushed or pulled to rotate. As is described above, piezoelectric actuator  76  provides a rapid response time for rotation of the circular cap. In addition, piezoelectric actuator aids with assembly by coupling to shutter plate  98  rather than performing actuation from within the camera. 
     Referring now to  FIGS.  10 A and  10 B , an example embodiment of a front face of the circular cap  90  illustrates underlying camera functions covered and uncovered.  FIG.  10 A  depicts camera module  46 , user presence detection sensor  48 , infrared camera  50  and a LED  86  exposed through alignment of openings formed in circular cap  90 .  FIG.  10 B  depicts shutter members  96  extended over camera module  46  by rotation of circular cap  90  to engage shutter members  96  in guides formed in the shutter plate. In addition, rotation of circular cap  90  relative to the underlying shutter plate misaligns the openings of circular cap  90  so that user presence detection sensor  48 , infrared camera  50  and LED  86  are blocked. The physical blocking of these underlying components enhances security by reducing the risk that an unauthorized user will access camera functions, such as to spy on an end user. In the example embodiment, all camera functions become available and unavailable in a coordinate manner, such as in concert with opening and closing of shutter members  96 . In an alternative embodiment, camera functions may be made available on an individual basis. For instance, in one embodiment, a user presence detection sensor is exposed at the front of cap  90  so that user presence detection remains available at all times. In an alternative embodiment, functions are provided in security increments where initial functions verify authorized use before full camera functionality is available. For example, an initial rotation of cap  90  exposes only a time of flight sensor so that a request for camera access is first verified by a user presence as opposed to an unauthorized remote access. Once a user presence is confirmed, further rotation of cap  90  exposes an infrared camera to support facial identification of the end user. If the end user identity is verified, additional rotation may expose just a microphone in the event the user only wants to use audio functions and then the camera module. The delay in opening shutter members  96  may be provided by forming guides that allow cap rotation without movement of the shutter members until all other functions are exposed. 
     Referring now to  FIG.  11   , a flow diagram depicts a process for managing security at completion of a usage session with a peripheral camera. The process starts at step  116  with user initiation of a video stop, such as closing a videoconference application running on an information handling system interfaced with the peripheral camera. At step  118 , the actuator drives the cover members or shutter to close. At step  120  the covering of the camera module is confirmed, such as by detection of a door position with a Hall sensor. At step  122 , failure to detect a magnet with the Hall sensor indicates that the camera module is covered so that, at step  124 , the Hall sensor sends a power off signal to the camera processing resource, such as a microcontroller. At step  126  the camera processing resource cuts off power to the camera. 
     Referring now to  FIG.  12    a flow diagram depicts a process for managing security at initiation of a usage session with a peripheral camera. The process starts at step  128  with an end user initiating a video start, such as by starting a videoconference application at an information handling system interfaced with the peripheral camera. At step  130  an actuator drives open the cover members or shutter to expose the camera module so that at step  132  the shutter or cover member is in an open state. At step  134  a Hall sensor detects alignment with a magnet so that at step  136  the Hall sensor sends a power on signal to the camera process resources, which at step  138  commands power to the camera. 
     Referring now to  FIG.  13   , a block diagram depicts a peripheral camera  36  configured to support security at a peripheral display  34  interfaced with an information handling system  10  to present visual images. Camera  36  includes a processing resource  140 , such as a microcontroller unit, that executes a security module  142  to enhance security of a display  34  that presents information as visual images from an information handling system  10  interfaced with peripheral camera  36 . As an initial matter, camera  36  retrieves from information handling system  10  a size of the display and, if available, a position of the display relative to the camera  36 . The display size is applied to determine a viewing distance at which an unauthorized end user might be able to view information presented at peripheral display  34 . In one example embodiment, information handling system  10  may also provide additional parameters for determining a security distance, such as the size of the letter with which information is presented and the context included like picture and video window size. For instance, a driver of peripheral camera  36  executing on information handling system can send a display size adjusted for security factors so that, the larger the display the more sensitive peripheral camera  36  is to taking security actions that limit access to presented visual images, such as dimming the display or putting up a security visual image in the place of sensitive visual image information. 
     Security module  142  monitors with user presence detection sensor  48  at a viewing location of peripheral display  34  to determine if an end user is present. The user presence detection sensor  48  may include a time of flight sensor that relies upon reflected infrared light or an ultrasonic sensor that relies upon Doppler effects associated with reflected sound energy. If an end user is detected, security module  142  initiates infrared camera  50  to perform facial recognition of the end user. Once the end user is verified as authorized, security module  142  makes microphone  104  and camera module  46  available to the end user. In one embodiment, security module  142  controls an actuator that covers and uncovers each functional asset as authorized, such as with different amounts of cap rotation to selectively expose each of user presence detection sensor  48 , infrared camera  50 , microphone  104  and camera module  46 . During end user activity, security module  142  continues to monitor user presence detection sensor  48  to determine if a second end user is detected in the viewing position of peripheral display  34 . The viewing position relative to peripheral camera  36  may be retrieved from information handling system  10  or may be derived by security module  142  by tracking an end user position relative to peripheral camera  36  when the end user is making inputs associated with viewing of peripheral display  34 , such as inputting a password to authorize access to information handling system  10 . If a second user is detected within the peripheral display viewing position, security module  142  may adjust the presentation of information at peripheral display  34 , such as by dimming the display or replacing sensitive information with a security user interface. In the example embodiment, security adjustments are determined at processing resource  140 , such as with artificial intelligence, and communicated to information handling system  10  for enforcement. In various embodiments, security module  142  may use infrared camera  50  and or camera module  46  to refine security adjustments based upon second end user identity and position. 
     Referring now to  FIG.  14   , a flow diagram depicts a process for managing display privacy with a peripheral camera. At step  144  user presence is monitored with a user presence detection sensor, such as a time of flight or ultrasonic sensor. At step  146  if a person is detected the process continues to step  148  to determine if the distance to the person presents a security issue for information presented at the peripheral display. If not, the process returns to step  144 . If a security issue is determined, the process continues to step  150  to capture an image of the person with an infrared camera and, optionally, a visual camera. At step  152 , the processing resource analyzes the captured image, such as with artificial intelligence, to determine if a security issue exists. At step  154  the security analysis includes a head and eye angle of the second person to determine if the second person can see information on the peripheral display. If a security issue is determined, the process continues to step  156  to protect presented information with a privacy screen. If a security issue does not exist, the information continues to be presented at the peripheral display at step  160  and the process returns to step  144  to continue monitoring for security at the peripheral display. 
     Referring now to  FIG.  15   , an example depicts security analysis by sensing context with a peripheral camera  36 . In the example embodiment, at step  162  security tracking is initiated due to detection of user movement, such as with the user presence detection sensor. Step  164  illustrates a variety of different two dimensional images of an end user chair  168  that may be captured by peripheral camera  36  to selectively initiate a privacy trigger  166 . For example, in one situation an end user might turn a chair sideways to converse with another individual where a reduced security risk might be determined since the end user will be watching the second person who is near the display. In another situation, the end user&#39;s chair position may indicate that amount of time that the end user will be gone from the viewing position. For example, artificial intelligence may model security parameters based on sensed context over time. 
     Referring now to  FIG.  16   , a flow diagram depicts a process for selective activation of peripheral camera functions to provide security at a peripheral display. The process starts at step  170  by detecting an interface by the peripheral camera with the information handling system. At step  172  the peripheral camera retrieves display size and position from the information handling system to determine security risks relative to the peripheral display viewing position. As described above, the peripheral camera position relative to the peripheral display may be derived based upon end user interactions with visual information at the display while the peripheral camera has the user in an infrared or visual field of view. At step  174 , the peripheral camera initiates monitoring user presence with a user presence detection sensor. At step  176 , monitoring continues until a user presence is detected, then the process continues to step  178  to expose an infrared camera. Covering the infrared camera until needed helps to maintain security by avoiding unauthorized access. At step  180  a determination is made whether the user is a valid user. If not, the information handling system may allow the user to input a valid password at step  182 . If no valid password is input, the process continues to step  184  to cover the infrared camera and step  174  to monitor user presence. At step  186 , after the end user is validated, the infrared camera is covered for security until separately needed. At step  188 , the user presence detection sensor continues to monitor for users at the peripheral display, such as to detect a second user approaching the peripheral display. If a second user is detected, the process continues to step  190  to expose the infrared camera and, optionally, the visual camera to capture images of the second user. At step  192  a security level is determined based upon the second user position relative to the display, the size of the presented visual images and, if available, the identity of the second user. For example, the peripheral camera may command an adjustment to the presented visual images based upon the security level, such as by dimming the peripheral display or presenting a privacy screen. Once the display presentation adjustment is performed, the process continues to step  194  to cover the infrared camera for improved security and returns to step  188  to continue monitoring the second user. 
     Although the present invention has been described in detail, it should be understood that various changes, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended claims.