Patent Publication Number: US-2023156305-A1

Title: Electric shaver with imaging capability

Description:
FIELD OF THE INVENTION 
     The present invention relates generally to electric shavers having electronic imaging functions. 
     BACKGROUND OF THE INVENTION 
     Razors are known as a bladed tool primarily used in the shaving off of unwanted body hair. Electric shavers are known as an alternative to razors for removal of hair and/or slicing hair down to the level of the skin. Such shavers are commonly used by men to remove their facial hair (such as beard, mustache and whiskers) and by women to remove their leg, underarm and other hair. Electric shavers, also known as ‘electric razors’ or ‘electric dry shavers’, commonly include of a set of oscillating or rotating blades, which are held behind a perforated metal foil that prevents the blades from coming into contact with the skin. In some designs a rotary type of shaver is used, wherein the blades are circular having a circular motion, while other shavers use oscillating blades. Blade movement is powered by a small DC motor, commonly powered by rechargeable batteries. Some electric shavers are plugged directly into an AC outlet to be powered therefrom. 
       FIG.  1    shows an example of an electric shaver  10  using a straight cutting mechanism. Front view  12  of the shaver  10  shows a foil  15  covering the blades, an on/off switch  16  and an enclosure  17 . View  11  is a side view and view  19  is a rear view of the shaver  10 . View  13  is a top view of the foil  15  which is usually in contact with the skin and the hair. View  14  is a bottom view showing a connector  18  for connecting to a power source, such as AC power 115 VAC/60 Hz (as in North America) or 220 VAC/50 Hz common in Europe. The shaver  10  parts are supported in an enclosure  17 , which may be an integrally molded body frame. The casing enclosing the frame and supported parts can be molded of plastic or can be a sheet metal body, or any other suitable synthetic resin material. The enclosure  17 , which is commonly hand-held, is shown as a rectangular, ‘box-like’ enclosure having four walls, which is commonly used with straight cutting systems. Cylindrical cases are also known and commonly used with rotary-type electric shavers. 
       FIG.  2    illustrates schematically a simplified general block diagram of an electric shaver powered by a battery or cell. The battery  24  powers a DC electric motor  26 , which is mechanically coupled via mechanical coupling  27  for driving power to rotate or oscillate blades included in a cutter mechanism  28 , thus cutting the hair via a foil such as foil  15  shown in  FIG.  1   . The coupling  27  may be a shaft or a transmission gear. An on/off switch  25  (corresponding to the switch  16  in  FIG.  1   ) allows the user to start and stop the operation of the electrical shaver. In many designs the battery  24  used is a rechargeable battery such as a nickel-cadmium battery. In such a case, a battery charger  23  employed for charging the battery while not in use. The battery charger or power supply  23  is commonly fed by domestic AC power through AC plug  21  and cord  22 , and commonly includes a step-down transformer. The charging associated components, such as the charger  23 , the AC plug  21 , and the cable  22 , are housed in a separate enclosure, and connected via a connector (such as jack socket or receptacle  18  in  FIG.  1   ) to the electric shaver assembly, housing the electric cell or cells  24 , the motor  26  and the cutting mechanism  28 ). In the case of only AC-powered shavers (without battery), the battery  24  is not used and the power supply  23  directly feeds the motor  26 . 
     Good visibility of the skin surface involved with the shaving is essential for quick, convenient, easy and effective shaving. In many cases, such as in a facial shaving, direct eye-contact during shaving cannot be made, and a mirror needs to be used. However, a mirror may not be available in all locations. Further, in the case of a foggy or dark environment, the image in the mirror cannot be seen well. Further, the hand holding the shaver and the shaver unit itself may hide and interfere with the required image of the shaving area. 
     An electric shaver containing a microcomputer and display means is disclosed in U.S. Pat. No. 5,274,735 to Okada entitled: “Electric Shaver”. In addition, an electric shaver including a display and light receiving means is disclosed in U.S. Pat. No. 5,920,988 to Momose entitled: “Electric Shaver”. 
     In consideration of the foregoing, it would be an advancement in the art to provide a method and system that is simple, cost-effective, faithful, reliable, has a minimum part count, minimum hardware, or uses existing and available components allowing convenient or better visualization of the skin during shaving, and in particular the shaving area. Such visualization may aid a person in determining how to adjust their shaving to produce the best shave. The shaving area refers to the skin surface area that is of interest to user for shaving, either required to be shaved, under shaving or after being shaved. 
     Furthermore, it would be highly advantageous to have a method and system providing a close, better and easier shaving experience by allowing a better viewing of the skin that is about to be shaved or was already shaved, preferably without the need of a mirror, under a dark environment, or under a condition where sufficient light is not provided. This will allow the user of the electric shaver to have real-time feedback on the shaving activity. 
     SUMMARY OF THE INVENTION 
     In one aspect of the present invention, a method and apparatus for using digital imaging or digital photography of the shaving area is described. Digital camera functionality is added to an portably hand-held housing of an electric shaver, allowing the shaving area image (either as still image or as video) to be captured, stored, manipulated and displayed on a display unit. The image capturing hardware is integrated with the electric shaver, and the image captured is reconstructed faithfully and displayed on a display unit for the user to view. The shaving improvement can benefit human hair removal such as facial or leg hair removal. 
     The image capturing hardware integrated with the electric shaver contains a photographic lens (through a lens opening) focusing the required image onto an image sensor. The image is converted into a digital format by an image sensor AFE (Analog Front End) and an image processor. The display unit uses a display interface to convert the digital image to a signal suitable to be displayed on the screen of the display. 
     In another aspect of the present invention, the display unit is integrated with the electric shaver. The display can be of a flip type, wherein the screen can be extended for user view only when required, and folded otherwise. 
     In another aspect of the present invention, the display unit is a separate device housed within a separate enclosure. The digital data representing the captured image is transmitted over a communication medium to the display unit. The display unit receives the digital data from the communication medium and displays it. In this scenario, the electric shaver includes a transmitter (or a transceiver) for transmitting the digital data to the communication medium, and the display unit includes a receiver (or a transceiver) for receiving the digital data from the communication medium. In one aspect according to the invention, the video signal is carried in an analog form over the communication medium, respectively using an analog transmitter and an analog receiver. 
     The communication between the electric shaver assembly and the display unit can be non-conductive over-the-air wireless, using radio, audio or light based communication, and use various WLAN, WPAN and other technologies. The wireless communication may use a spread-spectrum signal such as multi-carrier (e.g. OFDM, DMT and CDMA), or a single carrier (narrow-band) signal. Each of the wireless signals or the wireless communication links above may be WPAN, WLAN, WMAN, WAN, BWA, LMDS, MMDS, WiMAX, HIPERMAN, IEEE802.16, Bluetooth, IEEE802.15, IEEE802.11 (such as a, b and g), UWB, ZigBee and cellular such as GSM, GPRS, 2.5G, 3G, UMTS, DCS, PCS and CDMA. Similarly, each of the frequency bands above may be part of the ISM frequency bands. 
     Further, such communication can use a conductive medium such as cables or wires, or any other metallic medium. Standard PAN or LAN cabling and protocols may be used, such as Ethernet 10/100/1000BaseT. In one embodiment, powerline communication is used wherein the AC power wiring is used as the communication medium. 
     In another aspect of the present invention, a lossy or non-lossy compression of the image information is used for reducing the memory size and reducing the data rate required for the transmission over the communication medium. In this configuration, video compression functionality is added to the shaver, and a video de-compressor is added to the display unit for reconstructing the original signal. 
     In another aspect of the present invention, one or more light sources are added for better illumination of the photographed area or the shaving area. 
     In another aspect of the present invention, multiple image capturing mechanisms are used, each containing a lens and image sensor, allowing for capturing of larger shaving area. In one embodiment, each such image capturing can be mounted on a different wall or side of the electric shaver. In one embodiment, the lens is mounted in the cutter side of the shaver, which is in direct contact with the skin surface during shaving. 
     In another aspect of the present invention, digital image processing is used to analyze the captured image and notify the user (on the display or otherwise) of the results of such analysis. Individual hairs as well as hairy areas can be identified and marked. 
     In another aspect of the present invention, zooming and still image capturing features are provided, as well as other features commonly associated with still digital cameras and video cameras such as camcorders. Other controls such as brightness may also be provided. 
     In another aspect of the present invention, various controls are provided to the user by means of buttons and switches located as part of the electric shaver, or as part of the display unit or in both. Various visual indicators can also be employed. 
     In another aspect of the present invention, the camera added hardware in the shaver is powered from the same power source as the shaver itself, such as a battery (either primary or rechargeable) or from a domestic AC power. Similarly, the display unit may be powered locally from a battery or from the AC power. Further, the cable connecting between the electric shaver and the display unit (for example serving as the communication medium) can also be used to concurrently carry power either from the shaver to power the display unit or from the display unit to power the electric shaver unit. 
     In another aspect of the present invention, a single cable is used to connect the display unit with the electric shaver. The cable simultaneously carries both the communication signal for displaying the captured image on the display, and a power signal. The power signal can be fed from the display unit to power the electric shaver and its camera module, or alternately fed from the shaver to power the display unit. Carrying both the power and data signals over the same cable can make use of distinct separated wire sets, each set dedicated to one type of a signal. Alternatively, the same wires can carry both signals each over a different frequency band (FDM) or using phantom technique. 
     In another aspect of the present invention, the captured image is transmitted from the electric shaver using a standard analog or digital video interface, thus allowing the displaying of the video on standard and common video equipment. 
     One aspect of the present invention involves an electrically operated hair removing device for removing hair from a skin area, containing a casing, the casing further including a camera module for imaging at least part of the skin area, the camera module containing an optical lens for focusing received light mechanically oriented to guide the image of at least part of the skin area, a photosensitive image sensor array disposed approximately at an image focal point plane of the optical lens for capturing the image and producing electronic image information representing the image, and an analog to digital (A/D) converter coupled to the image sensor for generating digital data representation of the image. The image sensor may be based on Charge-Coupled Devices (CCD) or Complementary Metal-Oxide-Semiconductor (CMOS). The device may further contain an electric motor and a cutter driven by the motor, and may be power fed from a battery that is rechargeable or a primary type. 
     Further, the device may be operative to transmit the image digital data representation over a communication medium, and in such case may contain a port for coupling a signal to the communication medium, an image processor coupled to the analog to digital converter and for generating a digital data video signal carrying a digital data video according to a digital video format, and a transmitter coupled between the port and the image processor for transmitting the digital data video signal to the communication medium. The digital video format may be based on one out of: TIFF (Tagged Image File Format), RAW format, AVI, DV, MOV, WMV, MP4, DCF (Design Rule for Camera Format), ITU-T H.261, ITU-T H.263, ITU-T H.264, ITU-T CCIR 601, ASF, Exif (Exchangeable Image File Format) and DPOF (Digital Print Order Format) standards. Further, the device may be operative to compress the digital data video, and in such a case may further contain a video compressor coupled between the analog to digital (A/D) converter and the transmitter for compressing the digital data video before transmission to the communication medium. The compression may be based on intraframe or interframe compression, and can further be lossy or non-lossy compression. The communication over the communication medium may be half-duplex or full-duplex, and the device may further contain a receiver coupled to the port for receiving information from the communication medium. 
     In the case of using compression, the compression is based on a standard compression algorithm that is one or more out of JPEG (Joint Photographic Experts Group) and MPEG (Moving Picture Experts Group), ITU-T H.261, ITU-T H.263, ITU-T H.264 and ITU-T CCIR 601. For example, the compression can be based on ADV212 JPEG 2000 Video Codec, available from Analog Devices, Inc., from Norwood, Mass., U.S.A. 
     In one aspect of the invention the device casing further contains a battery, and the camera module is power fed from the battery. In an alternative solution, the device is operative to be powered from AC power, thus further contains an AC power plug for connecting to an AC power outlet for AC power feeding therefrom, and a power supply connected to the AC power plug to be power fed by the AC power, and the camera module is connected to be powered from the power supply. The power supply may include a step-down transformer and an AC/DC converter for DC powering the camera module. 
     In one aspect of the invention, the device further contains a display for displaying the captured image, the display may be mechanically attached to the casing and coupled to the analog to digital converter for visual displaying of the image representation. Further, the device may include a standard analog video interface, and in such a case the transmitter is an analog video driver, the analog video interface may be substantially based on one or more out of NTSC, PAL or SECAM formats, analog RGB and S-video, and the port is a coaxial or a RF connector. Alternatively, a standard digital video interface is employed, wherein the transmitter is a digital video driver and the port is a digital data connector. The digital video interface may be substantially based on one or more out of USB, SDI (Serial Digital Interface), FireWire, HDMI (High-Definition Multimedia Interface), DVI (Digital Visual Interface), UDI (Unified Display Interface), DisplayPort, Digital Component Video and DVB. 
     In one aspect of the invention, the communication medium is free air propagation of electromagnetic radio-frequency waves, and the port is an antenna for transmitting the wireless signal to the air, wherein the transceiver is a wireless transceiver. Such wireless communication and the wireless signal may be based on standard WPAN (Wireless Personal Area Network) or WLAN (Wireless Local area Network) technologies, and may substantially conform to at least one of the following standards: WMAN, WAN, BWA, LMDS, MMDS, WiMAX, HIPERMAN, IEEE802.16, Bluetooth, IEEE802.15, UWB (Ultra-Wide-band), ZigBee, cellular, IEEE802.11, WirelessHD, GSM, GPRS, 2.5G, 3G, UMTS, DCS, PCS and CDMA. 
     In one aspect of the invention, the communication medium is a wired medium, the port is a connector, and the transmitter is a wired transmitter adapted to transmit digital data to the wired medium. The communication over the wired medium may be according to a wired PAN (Personal Area Network) or a LAN (Local area Network) standard, and may further be based on serial or parallel transmission. For example, the wired medium may be a LAN cable substantially according to EIT/TIA-568 or EIA/TIA-570 containing a UTP (unshielded Twisted Pair) or STP (Shielded Twisted Pair). In such case the connector is an RJ-45 type, and the communication over the cable may substantially conform to IEEE802.3 Ethernet 10BaseT or 100BaseTX or 1000BaseT, and the transmitter may be a LAN transceiver. In an alternative aspect, the wired transmitter and the connector substantially conform to one out of IEEE1394, USB (Universal Serial Bus), EIA/TIA-232 and IEEE1284. 
     In one aspect of the invention, the communication medium is a cable, the port is a connector, and the transmitter is a wired transmitter adapted to transmit digital data to the wired medium. Further, the cable concurrently carries a power signal, and the device is at least in part powered from the power signal. The power signal may be a DC (Direct Current) power signal, or an AC (Alternating Current) power signal. The cable may contain multiple insulated wires, and the power signal may be carried over dedicated wires distinct from the wires carrying the communication signal. In the case wherein the cable contains multiple insulated wires, and the wires are used to simultaneously carry both power and communication signals, the power and communication signals are carried over the same wires. In such a case the power may be a DC power carrying over a phantom channel over the wires. For example, the cable may be a LAN cable substantially according to EIT/TIA-568 or EIA/TIA-570 and containing UTP or STP twisted-pairs, the connector may be RJ-45 type, the communication over the cable may substantially conform to IEEE802.3 Ethernet 10BaseT, 100BaseTX, or 1000BaseT, the transmitter may be a LAN transceiver, and the power may be carried over the cable substantially according to IEEE802.3af or IEEE802.3 at standards. 
     Alternatively, the power and communication signals may be carried over the same wires using Frequency Division Multiplexing (FDM), wherein the power signal is carried over a power frequency, and wherein the communication signal is carried over a communication frequency band distinct and above the power frequency. In this case, the device may further include a low pass filter coupled between the connector and the transmitter for substantially passing only the power frequency, for powering the transmitter from the power signal. Such device may also further include a high pass filter coupled between the connector and the transmitter for substantially passing only the communication frequency band, for passing the communication signal between the connector and the transmitter. In the case where power is AC power, the connector may be an AC power plug for connecting to AC power wiring, and the transmitter may be part of a powerlines modem, such as HomePlug or UPB. 
     In one aspect of the invention, the device further contains an additional optical lens for focusing received light mechanically oriented to guide the image of at least part of the skin area, an additional photosensitive image sensor array disposed approximately at an image focal point plane of the additional optical lens for capturing the image and producing additional electronic image information representing the image, and an additional analog to digital (A/D) converter coupled to the additional image sensor for generating an additional digital data representation of the image. The device may further include a multiplexer coupled to the analog to digital converters for generating a multiplexed signal containing the digital data representation of the images, a port for coupling a signal to the communication medium, and a transmitter coupled between the port and the image processor for transmitting the multiplexed signal to the communication medium. 
     In one aspect of the invention, the device further contains a digital image processor for processing the digital data representation of the image. The digital image processor may be operative to identify individual hair or a hairy area in the captured image, and the device may be further operative to generate a digital data representation of the image wherein the individual hairs or the hairy area are marked. 
     In one aspect of the invention, the device further includes a light source for providing an illumination. The light source may be mechanically mounted for illumination of at least part of the skin area captured by the optical lens and image sensor, and can be an LED (Light Emitting Diode). 
     The above summary is not an exhaustive list of all aspects of the present invention. Indeed, the inventor contemplates that his invention includes all systems and methods that can be practiced from all suitable combinations and derivatives of the various aspects summarized above, as well as those disclosed in the detailed description below and particularly pointed out in the claims filed with the application. Such combinations have particular advantages not specifically recited in the above summary. 
     It is understood that other embodiments of the present invention will become readily apparent to those skilled in the art from the following detailed description, wherein are shown and described only embodiments of the invention by way of illustration. As will be realized, the invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the scope of the present invention as defined by the claims. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not as restrictive. 
     The above and other features and advantages of the present invention will become more fully apparent from the following description, drawings and appended claims, or may be learned by the practice of the invention as set forth hereinafter. It is intended that all such additional apparatus and advantages be included within this description, be within the scope of the present invention, and be protected by the accompanying claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order that the manner in which the above recited and other advantages and features of the invention are obtained, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments thereof, which are illustrated in the appended figures and drawings. The invention is herein described, by way of non-limiting example only, with reference to the accompanying figures and drawings, wherein like designations denote like elements. Understanding that these drawings only provide information concerning typical embodiments of the invention and are not therefore to be considered limiting in scope: 
         FIG.  1    illustrates schematically views of a prior-art electric shaver; 
         FIG.  2    illustrates schematically a simplified general functional block diagram of a prior art electric shaver; 
         FIG.  3    illustrates schematically a simplified general functional block diagram of an electric shaver according to the invention; 
         FIG.  4    illustrates schematically a simplified general functional block diagram of a display unit according to the invention; 
         FIGS.  5  and  5     a  illustrate schematically views of an electric shaver according to the invention; 
         FIG.  6    illustrates schematically a system including an electric shaver and a display unit according to the invention; 
         FIG.  7    illustrates schematically a human male facial shaving using an electric shaver and a display unit according to the invention; 
         FIG.  8    illustrates schematically a human female leg shaving using an electric shaver and a display unit according to the invention; 
         FIG.  9    illustrates schematically a simplified general functional block diagram of an electric shaver according to the invention; 
         FIG.  10    illustrates schematically a simplified general functional block diagram of a display unit according to the invention; 
         FIG.  11    illustrates schematically a system including an electric shaver and a display unit according to the invention; 
         FIG.  11   a    illustrates schematically a human male facial shaving using an electric shaver and a display unit according to the invention; 
         FIG.  11   b    illustrates schematically a human female leg shaving using an electric shaver and a display unit according to the invention; 
         FIG.  12    illustrates schematically a simplified general functional block diagram of an electric shaver according to the invention; 
         FIG.  13    illustrates schematically views of an electric shaver according to the invention; 
         FIG.  14    illustrates schematically a simplified general functional block diagram of an electric shaver according to the invention; 
         FIG.  15    illustrates schematically a simplified general functional block diagram of a display unit according to the invention; 
         FIG.  16    illustrates schematically a system including an electric shaver and a display unit according to the invention; 
         FIG.  17    illustrates schematically views displayed on the display unit according to the invention; 
         FIG.  18    illustrates schematically views displayed on the display unit according to the invention; 
         FIG.  19    illustrates schematically views displayed on the display unit according to the invention; 
         FIG.  20    illustrates schematically a simplified general functional block diagram of an electric shaver according to the invention; 
         FIG.  21    illustrates schematically views of an electric shaver according to the invention; 
         FIG.  22    illustrates schematically views of an electric shaver according to the invention; 
         FIG.  23    illustrates schematically a simplified general functional block diagram of a display unit according to the invention; 
         FIG.  24    illustrates schematically a simplified general functional block diagram of an electric shaver according to the invention; 
         FIG.  25    illustrates schematically a system including an electric shaver and a display unit according to the invention. 
         FIG.  26    illustrates a perspective view of an electric shaver according to the invention; and 
         FIG.  27    illustrates a perspective view of an electric shaver according to the invention. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     The principles and operation of a network according to the present invention may be understood with reference to the figures and the accompanying description wherein similar components appearing in different figures are denoted by identical reference numerals. The drawings and descriptions are conceptual only. In actual practice, a single component can implement one or more functions; alternatively, each function can be implemented by a plurality of components and circuits. In the figures and descriptions, identical reference numerals indicate those components that are common to different embodiments or configurations. Identical numerical references (even in the case of using different suffix, such as 5, 5a, 5b and 5c) refer to functions or actual devices that are either identical, substantially similar or having similar functionality. It will be readily understood that the components of the present invention, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations. Thus, the following more detailed description of the embodiments of the apparatus, system, and method of the present invention, as represented in the figures herein, is not intended to limit the scope of the invention, as claimed, but is merely representative of embodiments of the invention. 
       FIG.  3    illustrates schematically a simplified general block diagram of an electric shaver including a digital camera module  31  according to one embodiment of the invention. The digital camera module  31  functions to receive visual information, such as the skin surface to be shaved, that was shaved, or the present shaving area, and interpret it as an electronic video signal to be remotely displayed by a display unit. The camera module can take still photographs, video streams or both. The electric shaver  30  shown in  FIG.  3    includes the electrical shaver  20  described in  FIG.  2   , added with digital camera functionality  31 . Preferably, the same enclosure (such as housing  17  shown in  FIG.  1   ) is used to house both the electric shaver and the digital camera functions. Preferably, the electric shaver  30  will have the same ‘look and feel’ of a common electric shaver. 
     The digital camera  31  includes lens  39  (or few lenses) for focusing the received light onto a small semiconductor sensor  32 . The sensor  32  commonly includes a panel with a matrix of tiny light-sensitive diodes (photocells), converting the image light to electric charges and then to electric signals, thus creating a video picture or a still image by recording the light intensity. Charge-Coupled Devices (CCD) and CMOS (Complementary Metal-Oxide-Semiconductor) are commonly used as the light-sensitive diodes. Linear or area arrays of light-sensitive elements may be used, and the light sensitive sensors may support monochrome (black &amp; white), color or both. For example, the CCD sensor KAI-2093 Image Sensor 1920 (H)×1080 (V) Interline CCD Image Sensor or KAF-50100 Image Sensor 8176 (H)×6132 (V) Full-Frame CCD Image Sensor can be used, available from Image Sensor Solutions, Eastman Kodak Company, Rochester, N.Y. 
     An image processor block  46  receives the analog signal from the image sensor. The Analog Front End (AFE) in the block  46  filters, amplifies and digitizes the signal, using an analog-to-digital (A/D) converter. The AFE further provides correlated double sampling (CDS), and provides a gain control to accommodate varying illumination conditions. In the case of CCD sensor  32 , a CCD AFE (Analog Front End) component may be used between the digital image processor  46  and the sensor  32 . Such an AFE may be based on VSP2560 ‘CCD Analog Front End for Digital Cameras’ from Texas Instruments Incorporated of Dallas Tex., U.S.A. The block  46  further contains a digital image processor, which receives the digital data from the ATE, and processes this digital representation of the image to handle various industry-standards, and to execute various computations and algorithms. Preferably, additional image enhancements may be performed by the block  46  such as generating greater pixel density or adjusting color balance, contrast and luminance. Further, the block  46  may perform other data management functions and processing on the raw digital image data. Commonly, the timing relationship of the vertical/horizontal reference signals and the pixel clock are also handled in this block. Digital Media System-on-Chip device TMS320DM357 from Texas Instruments Incorporated of Dallas Tex., U.S.A. is an example of a device implementing in a single chip (and associated circuitry) part or all of the image processor  46 , part or all of the video compressor  33  and part or all of transceiver  34 . In addition to a lens or lens system, color filters may be placed between the imaging optics and the photosensor array to achieve desired color manipulation. 
     The block  46  converts the raw data received from the photosensor array  32  into a color-corrected image in a standard image file format. In order to transmit the digital image to a remote display over a communication medium  37  (which may contain a wired or non-wired medium), a transmitter or transceiver  34  is disposed between the medium  37  and the image processor  46 . The transceiver  34  also includes isolation magnetic components (e.g. transformer-based), balancing, surge protection, and other suitable components required for providing a proper and standard interface via a port  38 . In the case of connecting to a wired medium, the port  38  will contain a connector and the port further contains protection circuitry for accommodating transients, over-voltage and lightning, and any other protection means for reducing or eliminating the damage from an unwanted signal over the wired medium. A band pass filter may also be used for passing only the required communication signals, and rejecting or stopping other signals in the described path. A transformer may be used for isolating and reducing common-mode interferences. Further a wiring driver and wiring receivers may be used in order to transmit and receive the appropriate level of signal to and from the wired medium. An equalizer may also be used in order to compensate for any frequency dependent characteristics of the wired medium. Further, the communication over the communication medium  37  can be bi-directional, such as half-duplex or full-duplex, or one-way, wherein the shaver only transmits the image to the display unit. 
     The port  38  couples to the communication medium  37 , and may be a connector in case of wired medium such as a cable or wires, or an antenna in the case of radio-frequency over-the-air wireless transmission. 
     A controller  35 , located within the camera module  31 , may be based on a discrete logic or an integrated device, such as a processor, microprocessor or microcomputer, and may include a general-purpose device or may be a special purpose processing device, such as an ASIC, PAL, PLA, PLD, Field Programmable Gate Array (FPGA), Gate Array, or other customized or programmable device. In the case of a programmable device as well as in other implementations, a memory is required. The controller  35  commonly includes a memory that may include a static RAM (random Access Memory), dynamic RAM, flash memory, ROM (Read Only Memory), or any other data storage medium. The memory may include data, programs, and/or instructions and any other software or firmware executable by the processor. The control logic can be implemented in hardware or in software, such as a firmware stored in the memory. The controller  35  controls and monitors the device operation, such as initialization, configuration, interface and commands. The term “processor” is meant to include any integrated circuit or other electronic device (or collection of devices) capable of performing an operation on at least one instruction including, without limitation, reduced instruction set core (RISC) processors, CISC microprocessors, microcontroller units (MCUs), CISC-based central processing units (CPUs), and digital signal processors (DSPs). The hardware of such devices may be integrated onto a single substrate (e.g., silicon “die”), or distributed among two or more substrates. Furthermore, various functional aspects of the processor may be implemented solely as software or firmware associated with the processor. 
     Power to the digital camera module  31  is fed from the battery  24  via on/off switch  25   a  for its described functions such as for capturing, storing, manipulating, and transmitting the image. The battery  24  power feeds the power supply  36 , which provides needed voltages to all the camera module  31  components. The power supply  36  contains a DC/DC converter. In another embodiment, the power supply  36  is power fed from the AC power supply via AC plug  21  and cord  22 , and thus may include an AC/DC converter, for converting the AC power (commonly 115 VAC/60 Hz or 220 VAC/50 Hz) into the required DC voltage or voltages. Such power supplies are known in the art and typically involves converting 120 or 240 volt AC supplied by a power utility company to a well-regulated lower voltage DC for electronic devices. In one embodiment, power supplies  36  and  23  are integrated into a single device or circuit, in order to share common circuits. Further, the power supplies  36  and  23  may include a boost converter, such as a buck boost converter, charge pump, inverter and regulators as known in the art, as required for conversion of one form of electrical power to another desired form and voltage. While both power supplies  23  and  36  (either separated or integrated) can be an integral part and housed within the shaver enclosure, they may be enclosed as a separate housing connected via cable to the shaver assembly. For example, a small outlet plug-in step-down transformer shape can be used (also known as wall-wart, “power brick”, “plug pack”, “plug-in adapter”, “adapter block”, “domestic mains adapter”, “power adapter”, or AC adapter). Further, each of the power supplies  23  and  36  may be a linear or switching type. 
     Various formats that can be used to represent the captured image are TIFF (Tagged Image File Format), RAW format, AVI, DV, MOV, WMV, MP4, DCF (Design Rule for Camera Format), ITU-T H.261, ITU-T H.263, ITU-T H.264, ITU-T CCIR 601, ASF, Exif (Exchangeable Image File Format), and DPOF (Digital Print Order Format) standards. In many cases, video data is compressed before transmission, in order to allow its transmission over a reduced bandwidth transmission system. A video compressor  33  (or video encoder) is shown in  FIG.  3    disposed between the image processor  46  and the transceiver  34 , allowing for compression of the digital video signal before its transmission over the communication medium  37 . In some cases compression will not be required, hence obviating the need for such compressor  33 . Such compression can be lossy or lossless types. Common compression algorithms are JPEG (Joint Photographic Experts Group) and MPEG (Moving Picture Experts Group). The above and other image or video compression techniques can make use of intraframe compression commonly based on registering the differences between part of single frame or a single image. Interframe compression can further be used for video streams, based on registering differences between frames. Other examples of image processing include run length encoding and delta modulation. Further, the image can be dynamically dithered to allow the displayed image to appear to have higher resolution and quality. 
     Single lens or a lens array  39  is positioned to collect optical energy representative of a subject or a scenery, and to focus the optical energy onto the photosensor array  32 . Commonly, the photosensor array  32  is a matrix of photosensitive pixels, which generates an electric signal that is representative of the optical energy that is directed at the pixel by the imaging optics. The image captured by the sensor  32  via the lens  39  is reconstructed and displayed in a display unit  40 , which can be a separated device located at a place convenient to look at while shaving.  FIG.  4    shows such a display unit  40 . The signal transmitted by the shaver/camera combined unit  30  is received from the communication medium  37  via the port  38 . A receiver or transceiver  34  is compatible with the shaver transmitter (or transceiver) and receives the digital data signal and feeds it to a video de-compressor (or video decoder)  41 . The original data is reconstructed and fed to a display interface  42 , for feeding to a display  45 . The display unit  40  is shown as being AC power fed via AC plug  21  and cord  22 , feeding in turn the power supply  44 , which may be similar or the same type as power supply  23 , which in turn provides all required voltages required for the active components of the display unit  40 . A controller  43 , which may be the same or similar to controller  35  above is used to control and monitor the device operation. The display  45  may be a digital or analog video display, and may use technologies such as LCD (Liquid Crystal Display), TFT (Thin-Film Transistor), FED (Field Emission Display), CRT (Cathode Ray Tube) or any other electronic screen technology that visually shows information such as graphics or text. In many cases, an adaptor (not shown) is required in order to connect an analog display to the digital data. For example, the adaptor may convert to composite video (PAL, NTSC) or S-Video or HDTV signal. A user interface  48 , coupled to the control  43 , may include various user operated switches to control the display operation. Various user controls can be available to allow the user to control and effect the display unit  40  operations, such as an on/off switch, a reset button and others. Other exemplary controls involve display associated settings such as contrast, brightness and zoom. 
       FIG.  5    shows various views of an example of an electric shaver  60  according to one embodiment of the invention, based on shaver  10  shown in  FIG.  1   . View  52  is a front view of the shaver  60 , view  51  is a side view, and view  50  is a rear view of the shaver  60 . View  53  is a top view of the foil  15 , which is usually in contact with skin and hair, and view  54  is a bottom view showing connector  18  for connecting to a power source. Added to shaver  10 ,  FIG.  5    shows a lens  55 , which corresponds to the lens  39  shown in  FIG.  3   . The lens  55  is housed and mechanically secured in a lens seating (or lens housing)  56 , which is part of or secured to the enclosure  17 , and keeps the lens  55  protected, in place, and directed towards the face while shaving. The lens  55  focuses the image onto a sensor  32  via an aperture in the shaver external enclosure. While the lens  55  and the related support  56  are shown located on the rear of the shaver  60 , it is apparent that they can be equally mounted on the front or on any one of the sides of the shaver  60 . While the invention is shown in  FIG.  5    with respect to straight blades mechanism, it is apparent that the invention herein can equally apply to a rotary type electric shaver. While the lens  55  and its corresponding seating  56  are shown to protrude a little from the side of the shaver casing  17  shown in  FIG.  1   , a recessed design wherein there is no such protruding can also be used. Preferably, the shaver with the camera module may preserve the general look and design of a conventional shaver without a camera, allowing the user to easily migrate to using the new functionality. 
       FIG.  5    further shows various user controls that may be required for the proper operation of the combined shaver/camera  60 . An ON/OFF switch  57  corresponds to switch  25   a  in  FIG.  3   , allowing the user to start or stop the camera module  31  operations. Button ‘FREEZE’  57  allows for capturing and freezing an image. Sliding button ‘ZOOM’  59  allows the zoom control of the camera operations. 
     While  FIG.  5    above shows an example wherein the lens  55  is mounted on one of the sides of the shaver, in one embodiment the lens  55  is mounted on the top side of the shaver, as shown in views  68  in  FIG.  5   a   . The lens  55  mounted in base  56 , is shown recessed as part of the shaving foil, thus directly viewing the part that is shaved or about to be shaved. 
     A system  61  according to one embodiment of the invention includes both electric shaver  60  and display unit  63 , as shown in  FIG.  6   . Display unit  63  corresponds to unit  40  shown in  FIG.  4   . Cable  64  is shown to connect shaver  60  and display unit  63 , serving as the communication medium  37  (shown in  FIG.  3   ) for transmitting the image as a video stream from the shaver  60  to the display  63 . Display unit  63  is shown to be on a shelf in a bathroom, also containing a mirror  62 , as is commonly available in a bathroom. The mirror  62  can supplement the view on the display  63  for better view of the skin shaving area. 
     System operation is exampled as view  70  in  FIG.  7   . The shaver  60  is shown used for facial shaving by a human male  71 , and connected to display unit  63  via cable  64 . The lens  55  in the electric shaver  60  captures the surface area shown as  72 , and transmits it to be displayed as image  73  in the display unit  63 . The user can look at the display  73  located in front of him, thus and easily and clearly track and see the shaving area to be shaved  72  and the shaving results. 
     While the invention has been exampled above with regard to human male facial shaving, it is apparent that the invention can apply to any other type of human shaving any part of the body skin. For example, hair leg shaving of a female human is exampled as system  80  in  FIG.  8   . The shaver  60  is shown used for facial shaving by a human female  81 , and connected to display unit  63  via cable  64 . The lens  55  in the electric shaver  60  captures the skin area shown as  82 , and transmits it to be displayed as image  83  in the display unit  63 . The user can conveniently look at the image  83  located in front of him, and easily and clearly track and see the skin area to be shaved  82  and the shaving results. 
     While the invention has been exampled above with regard to humans shaving hair, it is apparent that the invention equally applies to animals such as pets, wherein there is a need to shave or groom their hair. Further, the invention can be equally applied to any scenario wherein skincare is employed, requiring touching or close proximity with the skin to be treated, such as depilation or epilation. In those cases, a camera module such as module  31  shown in  FIG.  3    (or module  121  shown in  FIG.  12   ) is added in order to allow easy and convenient view of the skin area to be treated. 
     In one embodiment according to the invention, the electric shaver is cordless, thus untethered and fully portable. In such a configuration, the shaver is battery operated, thus powered from an internal battery during operation without the need to connect to a power source, such as AC power via a cord. Further, the image is transmitted over the air using radio frequency, thus obviating the need for a cable or any other conductor connecting the shaver and the display unit. It is apparent the radio communication of the image can be implemented also in the case of AC powered (via cable) shaver. 
     A cordless electric shaver  90  is shown in  FIG.  9   , adapted from shaver  30  in  FIG.  3   . The shaver  90  is powered during shaving solely from battery  24 , which may be a primary or secondary-rechargeable type. The rechargeable battery can be charged, while not powered, while still in the shaver. The communication medium  37  (shown in  FIG.  4   ) is over-the-air communication, using antenna  91  (serving as port  38 ) connected to wireless transceiver  92  (serving as transceiver  34 ). Similarly, display unit  40  shown in  FIG.  4    is adapted to support wireless communication. Wireless supporting display unit  100  in shown in  FIG.  10   , including an antenna  91  and wireless transceiver  92  representing port  38  and transceiver  34  (shown in  FIG.  4   ) respectively. A wireless system  110  is shown in  FIG.  11   , adapted from system  61  in  FIG.  6   , and comprising a wireless shaver  90  with antenna  91   a  shown (representing antenna  91  in  FIG.  9   ). The antenna  91   a  is in communication with antenna  91   b  (corresponding to antenna  91  in  FIG.  10   ), which is part of display unit  100 . As shown in system  110 , there is no cable connecting between the shaver  90  and the display unit  100 , thus avoiding the inconvenience associated with such cord. Various types of antennas  91  (or any other radio ports) can be used. Among these are PCB printed antennas, chip antennas, as well as panel and dome antennas. Furthermore, the antennas may be omni-directional or directional. Typically, the antennas are coupled using mating coaxial connectors, such as SMA, F-Type, N-Type and IPX, providing both the electrical connection as well as the mechanical attachment. In many cases, the antenna connection allows for easy disconnection and connection by means of snapping or screwing. 
     Any short-range wireless communication based on free-air propagation can be used for communication between the wireless shaver  90  and the display unit  100  in system  110 . According to one embodiment of the invention, a WLAN communication link is used to interconnect two or more isolated (W)PAN (Wireless Personal Area Network) systems. The reach of a PAN is typically a few meters, hence such networks are confined to a limited space, such as in-room communication. IEEE 802.15 is the working group of the IEEE 802, which specializes in Wireless PAN (WPAN) standards. Non-limiting examples of WPAN systems include:
         a. Bluetooth, which according to IEEE 802.15.1 standard, for example, operates over license-free ISM band at 2.45 GHz. An ad-hoc network of computing devices using Bluetooth technology protocols is known as piconet.   b. Ultra-Wide-band (UWB), which according to the IEEE 802.15.3 standard, for example, uses a wavelet (sometimes referred to as wireless USB). UWB or impulse radio transmitters emit short pulses approaching a Gaussian monocycle with tightly controlled pulse-to-pulse intervals.   c. ZigBee, which according to IEEE 802.15.4 standard, for example, offers low data rate and low power consumption.   d. IEEE 802.11a, commonly considered as WLAN (Wireless Local Area Network), but since it works in 5 GHz spectrum its reach is considerably limited, thus IEEE802.11a may also be considered as WPAN.       

     In addition to above technologies, proprietary networking schemes may also be used for interconnecting the units. Further, the system  110  can make use of WLAN technologies. Currently widespread WLAN technologies (e.g. WiFi) are based on IEEE 802.11 and include IEEE 802.11b, which describes a communication using the 2.4 GHz frequency band and supporting a communication rate of 11 Mb/s, IEEE 802.11a uses the 5 GHz frequency band to carry 54 MB/s and IEEE 802.11g uses the 2.4 GHz band to support 54 Mb/s. Other technologies based on WPAN. WLAN, WMAN, WAN, BWA, LMDS, MMDS, WiMAX, HIPERMAN, IEEE802.16, Bluetooth, IEEE802.15, UWB, ZigBee, cellular, IEEE802.11 standards, GSM, GPRS, 2.5G, 3G, UMTS, DCS, PCS and CDMA may be equally used. Wireless and wired technologies used for home networking can equally be used. 
     The Institute of Electrical and Electronic Engineers (IEEE) 802.11 standard group, branded as WiFi by the Wi-Fi Alliance of Austin, Tex., USA. IEEE 802.11b describes a communication using the 2.4 GHz frequency band and supporting communication rate of 11 Mb/s, IEEE 802.11a uses the 5 GHz frequency band to carry 54 MB/s and IEEE 802.11g uses the 2.4 GHz band to support 54 Mb/s. This is described in an Intel White Paper entitled “54 Mbps IEEE 802.11 Wireless LAN at 2.4 GHz”, and a chip-set is described in an Agere Systems White Paper entitled “802.11 Wireless Chip Set Technology White Paper”, both of these documents being incorporated herein by reference. Such a 802.11 supporting transceiver block  34  may be implemented using WaveLAN™ WL60040 Multimode Wireless LAN media Access Controller (MAC) from Agere Systems of Allentown, Pa. U.S.A., whose a product brief is incorporated herein by reference, which is part of a full chip-set as described in WaveLAN™ 802.11a/b/g Chip Set document from Agere Systems of Allentown, Pa. U.S.A., which is incorporated herein by reference. Reference is made to the manufacturer&#39;s data sheet Agere Systems, WaveLAN™ WL60040 Multimode Wireless LAN Media Access Controller (MAC), Product Brief August 2003 PB03-164WLAN, which is incorporated herein by reference. 
     Some wireless technologies, in particular microwave signals used in the WAN and MAN arenas, are using frequencies above 2-3 GHz where the radio path is not reflected or refracted to any great extent. Propagation in such frequencies requires a Line-of-Sight (LOS) relying on a line of sight between the transmitting antenna and the receiving antenna. Using this concept allows for NLOS (Non-LOS) wireless networks to interconnect over a LOS-based communication link. In addition, the wireless technology implemented may use either licensed frequency bands or unlicensed frequency bands, such as the frequency bands utilized in the Industrial, scientific and Medical (ISM) frequency spectrum. In the US, three of the bands within the ISM spectrum are the A band, 902-928 MHz; the B band, 2.4-2.484 GHz (referred to as 2.4 GHz); and the C band, 5.725-5.875 GHz (referred to as 5 GHz). Overlapping and/or similar bands are used in different regions such as Europe and Japan. Further, cellular technologies can also be used, commonly using licensed spectrum. Such digital technologies include GSM (Global System for Mobile Communications), GPRS (General Packet Radio Service), CDMA (Code Division Multiple Access), EDGE (Enhanced Data Rates for GSM Evolution), 3GSM, DECT (Digital Enhanced Cordless Telecommunications), Digital AMPS (per IS-136/TDMA, for example) and iDEN (Integrated Digital Enhanced Network). The service carried over the cellular network may be voice, video or digital data such as the recently introduced EVDO (Evolution Data Only). In one embodiment, a WirelessHD standard based wireless communication is employed, which is based on the 7 GHz of continuous bandwidth around the 60 GHz radio frequency and allows for uncompressed, digital transmission. 
     Digital cameras utilizing wireless communication are disclosed in U.S. Pat. No. 6,535,243 to Tullis entitled: “Wireless Hand-Held Digital Camera”, U.S. Pat. No. 6,552,743 to Rissman entitled: “Digital Camera-Ready Printer”, U.S. Pat. No. 6,788,332 to Cook entitled: “Wireless Imaging Device and System”, and in U.S. Pat. No. 5,666,159 to Parulski et al. entitled: “Electronic camera system with programmable transmission capability”, which are all incorporated in their entirety for all purposes as if fully set forth herein. A display system and method utilizing a cellular telephone having digital camera capability and a television linked directly over a UWB wireless signal is disclosed in U.S. Pat. No. 7,327,385 to Yamaguchi entitled: “Home Picture/Video Display System with Ultra Wide-Band Technology”, which is incorporated in its entirety for all purposes as if fully set forth herein. 
     The advantage of using wireless communication is exampled as system  111  in  FIG.  11   a   , when compared to system  70  in  FIG.  7   . The shaver  90  is shown used for facial shaving by a human male  71 , which is portable and not tethered. Similarly, display unit  100  is not connected using any cable to the shaver, thus the need to use a cable  64  is obviated. The lens  55  in the electric shaver  90  captures the skin area shown as  72 , and transmits it wirelessly to be displayed as image  73  in the display unit  100 . The user can look at the display  100  located in front of him, and easily and clearly track and see the skin area to be shaved  72  and the shaving results. Similarly, wireless operation is exampled for hair leg shaving of a female human as system  112  in  FIG.  11   b   . The shaver  90  is shown used for leg shaving by a human female  81 , and a display unit  100 . The lens  55  in the electric shaver  90  captures the skin area shown as  82 , and transmits it to be displayed as image  83  in the display unit  100 . The user can conveniently look at the display  100  located in front of her, and easily and clearly track and see the skin area to be shaved  82  and the shaving results, without the need for the cable  64  shown for system  80  in  FIG.  8   . 
     As described above, communication based on electromagnetic waves in various parts of the electromagnetic spectrum can be used for communication. For example, low-frequency electromagnetic radiation can be used to transmit audio-frequency signals over short distances without a carrier. Radio-frequency transmission is a special case of this general electromagnetic transmission. As noted previously, light is also a special case of electromagnetic radiation, but is herein treated separately because of the characteristics of light are distinctly different from those of electromagnetic transmission in other usable parts of the electromagnetic spectrum. 
     Non-wired communication accomplished by light, either visible or non-visible light wavelength, can be used for the above transmission. The most popular is infrared (IR) based communication, but ultraviolet may also be used. Most such systems require substantially ‘line-of-sight’ access. In such a system, the antenna  91   a  in the shaver  90  is replaced with light emitter (e.g. LEDs), and the antenna  91   b  in the display unit  100  will be replaced with light detectors (e.g. photoelectric cell), and the communication over the air relies on the propagation of light. 
     Similarly, sound-based communication over space may be used, wherein the transceivers  92  use microphones and speakers, and the communication relies on the propagation of sound waves through the air in the space. Either audible sound (20-20,000 Hz band), or inaudible sound (ultrasonic, above 20,000 Hz; or infrasonic, below 20 Hz) can be used. In this case, the antenna  91  will be substituted with a microphone or a similar device converting the sound signal into an electrical signal, and a speaker or a similar device for generating the audio signal and transmitting it to the air. A transducer combining into a single device both the speaker and the microphone functionalities may also be used. Since these solutions do not require any physical connection, such as cable, they provide both ease-of-use and mobility. Such non-wired solutions are effective over short distances. Furthermore, most of the non-wired solutions cannot easily pass through walls and other such obstructions, owing to the attenuation to the signals. Hence, such techniques are suitable for communication within a single room, but are not suitable for communication between the rooms of a home or other building. 
       FIG.  12    shows an electric shaver  120  according to one embodiment of the invention having a camera module  121 . Light sources  123   a  and  123   b  are shown connected to be power fed from the power supply  36 . The light sources  123   a  and  123   b  preferably are directed to illuminate the shaving area of the skin, and in particular the area captured and transmitted via the camera module  121  thus allowing better visualization for the user in general, and aiding to the brightness and quality of the image captured by lenses  39   a  and  39   b  and sensor  32 , thus resulting in a better image displayed by the display unit  40 . Further, such illumination may be useful in the case of lack of external light availability while shaving. In one embodiment, a semiconductor light source such as a Light-Emitting-Diode (LED) is used, having small form factor and high efficiency. However, any type of visible electric light emitter such as a flashlight, an incandescent lamp and compact fluorescent lamps can be used. While  FIG.  12    shows two such light sources  123   a  and  123   b , it is apparent that a single one can be used, as well as three or more such light sources. Further, an on/off switch can be used to control the light sources  123   a  and  123   b , either together or individually, allowing the user to use the light only when required. 
     A razor including lighting means is disclosed in U.S. Patent Application 2008/0028616 to KWAK entitled: “Shaver with Lighting Means”. Electric shavers containing illumination means are disclosed in U.S. Pat. No. 6,871,402 to Bader et al. entitled: “Electrically driven Hair Removal Device”, and in U.S. Pat. No. 5,920,988 to Momose entitled: “Electric Shaver”, which are both incorporated in their entirety for all purposes as if fully set forth herein. 
     Electric shaver  120  is shown in  FIG.  12    to only use the AC power via the power supply  23 , without the use of any battery. In this case, the AC plug  21  has to be plugged to an AC outlet to be powered therefrom during the shaver  120  operation. However, it is apparent that the battery operated device (either primary or rechargeable) can be equally used, as described above. Further, shaver  120  in  FIG.  12    is shown to have a single on/off switch  25  for powering both the motor and associated cutting mechanism and the camera module  121 . However, it is apparent that two such switches can be used, one dedicated to the shaver basic function only, while the other allows for the camera operation, thus providing more flexibility to the user. 
     While the invention has been exampled above with regard to capturing a single image using a single lens  39  and a single sensor  32 , it is apparent that multiple images can be equally considered, using multiple image capturing mechanisms. An example of two capturing mechanisms is shown for shaver  120  in  FIG.  12   . Lens  39   a  and  39   b  are respectively associated with sensors  32   a  and  32   b , which in turn respectively connects to image processors  46   a  and  46   b . In the case of when compression function is used, the video compressors  33   a  and  33   b , respectively, compress the data received from processors  46   a  and  46   b . In one embodiment, two transceivers (each of the same as transceiver  34 , for example) and two ports (each of the same type as port  38 , for example) are used. Further, two communication mediums (each similar or the same as medium  37 ) can be employed, each carrying solely the image corresponding to the respective lens. Further, the same medium can be used using Frequency Division/Domain Multiplexing (FDM). In such an environment, each signal is carried in a dedicated frequency band, distinct from the other signals concurrently carried over the same medium. The signals are combined onto the medium and separated from the medium using various filtering schemes, employed in the multiplexer  122 . In another embodiment, the multiple images are carried using Time Domain/Division Multiplexing (TDM), as exampled in  FIG.  12   . The digital data stream from the video compressors  33   a  and  33   b  is multiplexed into a single stream by the multiplexer  122 , serving as a time multiplexer. The combined signal is then fed to the single transceiver  34  for transmitting onto the medium. 
     In both FDM and TDM schemes, a de-multiplexer is used in the display unit  40 , separating the streams and converting into images or video streams to be displayed. Multiple displays (each same as display  45  shown in  FIG.  4   ) can be used, each displaying the respective images captured. Alternatively, a single display  45  is used. In this case, the images can then be displayed one at a time, or together in various locations over the screen as side-by-side. Further, the display unit  40  may include an image processor for properly combining the separate images to build one image containing all information. 
     Using two or more image capturing components can further be used to provide stereoscopic video, allowing 3-D or any other stereoscopic view of the content, or other methods of improving the displayed image quality of functionality. 
       FIG.  13    shows various views of an example of an electric shaver  135  (corresponding to shaver  120  in  FIG.  12   ) according to one embodiment of the invention. View  132  is a front view of the shaver  135 , view  131  is a side view and view  130  is a rear view of the shaver  135 . View  133  is a top view of the foil  15 , which is usually in contact with the skin and the hair, and view  134  is a bottom view. The electric shaver  135  is shown as having lenses  55   a ,  55   b ,  55   c  and  55   d  respectively based in lenses housings  56   a ,  56   b ,  56   c  and  56   d , each in a separate wall of the casing. Light sources (e.g. LEDs)  123   a  and  123   b , respectively seated in housings  136   a  and  136   b , are also shown on the wide sides of the casing, respectively adjacent to Lens bases  56   a  and  56   b.    
     While the invention has been exampled above with regard to capturing, transmitting and displaying a visible image, it is apparent that a non-visible spectrum can be equally used, such as infrared and ultraviolet. In such a configuration, the infrared image is captured, and is converted to a visible image on the display. For example, such technique can be used to easily distinguish the skin and the hair, as they are having different temperature and thus distinct infrared signature. In such a system, the sensor  32  is sensitive to the non-visible part of the light spectrum (e.g. infrared), and the light emitters  123   a  and  123   b  are illuminating using the corresponding light spectrum, such as infrared light sources. 
     Powerline communication is known in the art for using the AC power wires in a building for digital data communication. Traditional approaches to powerline communication (e.g., home or office) include applications such as control of lighting and appliances, as well as sending data or broadband data, video or audio. Powerline command communication systems include for example X-10, CEBus (Consumer Electronics Bus per EIA-600 standard), and Lonworks. 
     The HomePlug organization is an industry trade group for powerline communication including various entities to define powerline communication specifications. HomePlug 1.0 is a specification for a home networking technology that connects devices to each other through power lines in a home. HomePlug certified products connect PCs and other devices that use Ethernet, USB, and 802.11. Many devices made by alliance members have HomePlug built in and connect to a network upon plugging the device into a wall socket in a home with other HomePlug devices. Signal interference, from surge protectors, extension cords, outlet strips and/or other proximately located devices, including the high-frequency signals, is an on-going concern of the HomePlug alliance. Similarly, HomePlug AV (HPAV) is a new generation of technology from the HomePlug Powerline Alliance. HPAV can be for example embedded in consumer electronics or computing products, and provides high-quality, multi-stream, entertainment-oriented networking over existing AC wiring. Users can avoid having to install new wires in their premises by using devices having built-in HomePlug technology. HPAV uses advanced PHY and MAC technologies that provide a 200 Mbps (million bits per second) class powerline network for inter alia video, audio and data. The Physical (PHY) Layer utilizes this 200 Mbps channel rate to provide a 150 Mbps information rate to provide communications over noisy power line channels. As used herein, the terms “powerline” and “powerline communications” refer to any technology that is used to transfer data or signals over a power distribution system, including without limitation UPB, HomePlug, HomePlug a/v, and X-10 technologies. As used herein, the term “UPB” or Universal Powerline Bus refers to one exemplary instance of technologies which impose digital or analog signals or pulses onto AC waveforms or DC power delivery systems, such as for example the well known UPB approach set forth in “Universal Powerline Bus: The UPB System Description”, Version 1.1 dated Sep. 19, 2003, incorporated herein by reference in its entirety. Lastly, the term “HomePlug” as used herein is meant specifically to include devices and systems compliant with the HomePlug™ Powerline Alliance Specification for powerline-based home networks (including the more recent HomePlug A/V), and generally to include all other comparable devices adapted for powerline networking. 
     In one embodiment according to the invention, powerline communication is used for the interconnection between the electric shaver and the display unit, such as HomePlug based communication. One advantage in such a configuration is that only a single power cable is used, carrying both the AC power and the communication signal. Such a shaver  140  is shown in  FIG.  14   . A low pass filter  141  is disposed between the AC power plug  21  and the power supply  23 , for passing only the AC power signal, such as the 50 Hz or the 60 Hz. Such a low pass filter  141  also stops and exhibits high impedance in the digital data frequency band, thus reducing impedance loading at this frequency band. Transceiver  34  of  FIG.  12    is replaced with a powerline modem, connected to the AC power wires via a high pass filter  142 , which passes only the digital data frequency band, hence allowing only the digital data signal to pass, while stopping the AC power. If HomePlug technology is used, the modem is a HomePlug compliant modem, and the communication (physical layer and higher protocol layers) is implemented according to the HomePlug specification standard. As an example, such modem can be based on INT6000 ‘HomePlug AV High-Speed Powerline Solution’ available from Intellon Corporation, headquartered in Orlando, Fla., U.S.A. 
     Similarly, display unit  150 , shown in  FIG.  15   , is also adapted to support powerline communication, in order to communicate with a mating electric shaver  140  of  FIG.  14   . Low pass filter  141  is added between the AC power plug  21  and the power supply  44 . The transceiver  34  is replaced with a powerline modem, connected to the AC power wires via high pass filter  142 , which passes only the digital data frequency band, hence allowing only the digital data signal to pass, while stopping the AC power. If HomePlug technology is used, the modem is a HomePlug compliant modem, and the communication (physical layer and higher protocol layers) is implemented according to the HomePlug specification standard. 
     An illustration of a powerline based system is shown as system  160  in  FIG.  16   . The shaver  140  is AC power fed from a mains outlet  163   a , via plug-in unit  162   a  and cord  161   a . The plug-in components  162   a  can be just an AC power plug  21  and the cord may be power cable  22  disclosed above. Alternatively, part or all of power supplies  23  and  36  can also be integrated into the plug in device  162   a . Similarly, the display unit  150  is AC power fed from a mains outlet  163   b , via plug-in unit  162   b  and cord  161   b . The plug-in component  162   b  can be just an AC power plug  21  and the cord may be power cable  22  disclosed above. Alternatively, part or all of power supplies  23  and  36  can also be integrated into the plug in device  162   b . While the shaver  140  and the display unit  150  are fed via the AC power system, the AC power wiring is also used as the communication medium as described above, obviating the need for additional cables to be connected between those devices. 
     In one embodiment of a non-conductive network medium, a fiber optic cable is used. In such a case, transceiver  34  is a fiber optic transceiver, and similarly port  38  is a fiber optic connector. As such, the term ‘wiring’ and ‘cable’ in this application should be interpreted to include networks based on non-conductive medium such as fiber-optics cabling. 
     In one embodiment, exampled in  FIG.  6   , a dedicated cable  64  is connected between the electric shaver  60  and the display unit  63 . The cable  64  serves as the wired communication medium  37 , connected to via a connector serving as the port  38 . Such wired medium  37  may be a UTP, STP, coaxial cable, a telephone wire pair, a CATV coaxial cable, AC power wire pair and LAN cable, such as Category 5 or Category 6. A suitable connector  38  may be used for connecting to the specific type of the wired medium, such as a coaxial connector for connecting to a coaxial cable and a telephone connector for connecting to a telephone wire pair. The wired medium may be a single non-used twisted-pair in a LAN cable, or two such pairs connected in parallel. In another aspect of the present invention, the wired medium is using a phantom channel formed between two wire pairs, such as two twisted wire pairs in a LAN cable used in Ethernet 10BaseT, 100BaseTX or 1000BaseT. Similarly, any PAN, LAN, MAN or WAN wiring may be used as the wired medium. 
     Further, transceiver  34  is adapter to be a wired modem or a wired transceiver suitable for transmitting and receiving over the appropriate wiring used. The communication over such cable can be proprietary or preferably using an industry standard communication, wherein the connections of the shaver and of the display unit to the cable are based on standard connectors and interfaces. The communication may be based on a parallel scheme, wherein multiple wires are used to concurrently carry the digital data, thus allowing a higher transfer rate of the information. In an alternative embodiment, serial communication is used, allowing for few conductors to be used and smaller footprint connectors requiring the usage of less pins and contacts. Various standard PAN (Personal Area Network), WAN (Wide Area Network) and LAN (Local Area Network) protocols can be used. In one embodiment, standard LAN (Local Area Network) is used, such as Ethernet IEEE802.3 10BaseT, 100Base TX or 1000BaseT. In such a case the transceiver  34  is Ethernet PHY (i.e. Ethernet physical layer or Ethernet transceiver) that can be implemented based on “LAN83C180 10/100 Fast Ethernet PHY Transceiver” or “LAN91C111 10/100 Non-PCI Ethernet Single Chip MAC+PHY” available from SMSC—Standard Microsystems Corporation of Hauppauge, N.Y. U.S.A. While this function can be implemented by using a single dedicated component, in many embodiments this function is integrated into a single component including other functions, such as handling higher layers. The transceiver  34  may also contains isolation magnetic components (e.g. transformer-based), balancing components, surge protection hardware, and a port  38  is a LAN connector (commonly RJ-45) required for providing a proper and standard interface via connector  34 . In one embodiment, standard cabling is used, such as standard LAN cabling. For example, Category 5 cabling (‘structured wiring’) or any other wiring according to EIT/TIA-568 and EIA/TIA-570 can be used. Such LAN cabling involves wire pairs that may be UTP or SIT. Similarly, category 3, 4, 5e, 6, 6e and 7 cables may be equally used. Such configuration is described, for example, in EIT/TIA-568 and EIA/TIA-570. It will be appreciated that any wired interface, other than Ethernet 10/100BaseT described above, being proprietary or standard, packet or synchronous, serial or parallel, may be equally used, such as IEEE1394, USB (Universal Serial Bus), EIA/TIA-232, PCI (Peripheral Component Interconnect), PCMCIA (Personal Computer Memory Card international Association), or IEEE1284, but not limited to the aforementioned. Furthermore, multiple such interfaces (being of the same type or mixed) may also be used. 
     A tethered portable electronic camera connectable to a computer is disclosed in U.S. Pat. No. 5,402,170 to Parulski et al. entitled: “Hand-Manipulated Electronic Camera Tethered to a Personal Computer”. Electric shavers comprising illumination means are disclosed in U.S. Pat. No. 6,871,402 to Bader et al. entitled: “Electrically driven Hair Removal Device”, and in U.S. Pat. No. 5,920,988 to Momose entitled: “Electric Shaver”, which are both incorporated in their entirety for all purposes as if fully set forth herein. A digital electronic camera which can accept various types of input/output cards or memory cards is disclosed in U.S. Pat. No. 7,432,952 to Fukuoka entitled: “Digital Image Capturing Device having an Interface for Receiving a Control Program”, and the use of a disk drive assembly for transferring images out of an electronic camera is disclosed in U.S. Pat. No. 5,138,459 to Roberts et al., entitled: “Electronic Still Video Camera with Direct Personal Computer (PC) Compatible Digital Format Output”, which are both incorporated in their entirety for all purposes as if fully set forth herein. 
     While the invention has been described above with the goal of faithfully displaying the image captured by the lens in the display, the availability of the image as a digital data allows for processing to aid in the user shaving experience. In one embodiment, image processing is employed, such as digital image processing and other techniques applying various computer algorithms to the image captured and represented as a two-dimensional signal data. The results can be provided to the user in various ways, such as to be presented on the display of the display unit. 
     In one digital image processing feature, the individual hairs are detected and identified. Such ‘hair recognition’ can make use of the different colors or brightness of the hair versus the skin. For example, a black colored hair can be identified and recognized over a light-color (e.g. white) skin. Further, pattern recognition algorithms can be used based on the characteristic of the hair, such as being long and having straight or curled pattern. A camera with human face detection means is disclosed in U.S. Pat. No. 6,940,545 to Ray et al., entitled: “Face Detecting Camera and Method”, which is incorporated in its entirety for all purposes as if fully set forth herein. 
     An example of image processing feature is shown in  FIG.  17   . View  170  shows the display before any processing, with the goal of faithfully reflecting the situation on the skin to be shaved or re-shaved. Several individual hairs are shows as  172   a ,  172   b  and  172   c , which need to be shortened or cut as part of the shaving (for example, due to being too long). The ‘hair recognition’ image processing algorithms identify the individual hair that needs to be shaved, and marks them on the screen of the display unit, allowing the user easy identification of places and locations that need to be shaved. Such view  171  is shown, wherein the individual hairs are marked by a circle around them, such as circles  182   a ,  182   b ,  182   c  and  182   d , or alternatively as bolded and thicker objects shown as  183   a ,  183   b ,  183   c  and  183   d.    
     In one embodiment, the image processing is used to suggest areas that require shaving or re-shaving.  FIG.  18    shows a view  180  captured and displayed, wherein the right side contains hair that need to be removed, while the left side  173  shows no hair to be cut. The algorithm will identify and mark the area to be shaved so it can be easily identified by the user, and this may be presented on the screen of the display unit as colored area  184  shown in view  181 . 
     Another feature that may be used is the zooming functionality, which is known in the art for cameras. The zoom functions allow for decreasing or narrowing of the apparent angle of a view, thus allowing scaling up the image size and magnifying for better view of a smaller area. A mechanical or optical zoom is obtained by varying the focal length using a mechanical assembly for physically moving the lens or lenses as required. On one embodiment, a small motor is used for moving the lens. Such a motor is added to shaver  30 , power fed from the power supply  36 , and driving and adjusting the camera optics as required for gaining optical resolution. 
     In an alternative embodiment, digital zoom is used, wherein no mechanical moving or camera optics are required, but rather, image processing techniques and algorithms are used to resize the displayed smaller area over the display. Interpolation is commonly required as part of the image processing. An example of zoom functionality is shown in  FIG.  19   , showing an original (pre-zoom) view  190 , with an area of interest shown as  191 . After the zoom operation, the former area  192  is scaled to fit the whole display area. 
     Digital (or electronic) zoom as well as other image processing functionalities (such as hair recognition described above) can be implemented by a separate processor located in the electric shaver  30  or in the display unit  40 , wherein the processor in disposed in the image data flow, or as a replacement to the video compressor  33  or video compressor  41 . Further, the required functionalities may be used by two image processors, one in the shaver  30  and one in the display unit  40 . Alternatively, the image processing can be integrating within the image processor  46 , or as part of the display interface  42 , or in both. In one example, the zoom control by the user is being part of the shaver  30 , as shown by the sliding switch  59  as part of view  50  in  FIG.  5   . Alternatively, or in addition, the zoom control by the user can make use of buttons or other controls implemented as part of the display unit. 
     Video is known also as the technology of electronically capturing, recording, processing, storing, transmitting and reconstructing a sequence of still images representing scenes in motion. Most video cameras (camcorders) have the capability of capturing and storing a single (still) picture. Such functionality can also be beneficial in the system above, wherein a user operated button ‘FREEZE’ shown as  58  in  FIG.  5   , being part of the user interface  47 , can be used to take a single shot to get a momentary image to be stored and displayed in the display unit. Such still image allows the user to carefully analyze the image that is frozen and unchanged. 
     In addition to the ‘zoom’ and ‘freeze’ features described above, many other features and user controls used in digital still cameras and in video cameras (camcorders) can be used in the system according to the invention. For example automatic mode-level, auto focus, exposure compensation, white balance level, manual focus and aperture control. Other exemplary controls involve specific display settings such as contrast, brightness and zoom. 
     User control regarding activating these features or controlling the features can be done using buttons and switches. Implementing these functions can be solely within the shaver, solely within the display unit or split between both devices. In one embodiment, the user control in the form of buttons and switches on the shaver itself, as part of user interface  47  and managed by the controller  35 . In the case that the function is implemented in hardware or software, which are in full or in part executed in the display unit, the communication channel over the communication medium  37  is used to transmit the proper signals to the display unit. Further, these control data can be multiplexed and sent with the image digital data, using the same transceiver  34 . Similarly, the user control in the form of buttons and switches and/or touch screen can be located on the display unit, as part of user interface  48  and managed by the controller  43 . In the case that the function is implemented in hardware or software, which are in full or in part executed in the electric shaver unit, the communication channel over the communication medium  37  is used to transmit the proper signals to the display unit. Further, the control data can be multiplexed and sent with the image digital data, using the same transceiver  34 . Further, some of the control can be in the shaver and some in the display unit. 
     The mechanical movement of the cutters  28  and the spinning of the motor  26 , added to the general inherent stability caused by the human holding the shaver, may induce instability causing the display image to move and be instable, thus effecting the displaying quality and burdening the user looking at the image on the display. In one embodiment, the optical section of the shaver, which includes the lens  39  and sensor  32 , are mounted to the frame or the shaver using vibration isolators or vibration suppressors, to reduce the vibration effect on the captured image. In another embodiment, various digital image techniques are used to stabilize the displayed image, such as by filtering and other known image processing techniques. Improving the vibration generated by the mechanical system may also aid to reduce the effect on the optical system thus improving the user experience. 
     Other image processing functions may include adjusting color balance, gamma and luminance, filtering pattern noise, filtering noise using Wiener filter, changing zoom factors, recropping, applying enhancement filters, applying smoothing filters, applying subject-dependent filters, and applying coordinate transformations. Other enhancements in the image data may include applying mathematical algorithms to generate greater pixel density or adjusting color balance, contrast and/or luminance. 
     While the invention has been exampled above with regard to a separated shaver and display unit, it will be appreciated that the invention equally applies to the case wherein the shaver further includes the display unit, either as a substitute or added to the separated display unit.  FIG.  20    shows a block diagram of a shaver  200  integrally including a camera and a display module  201 . The digital representation of the image captured from the image processor  46  is fed directly to the display interface  42  and then to the display  45 , which provides image visualization. The control function  35 , the user interface  47  and the power supply  36  need to be adapted to support the added functionality of the display unit. 
     An example of a physical view of the shaver  200  is shown as shaver  210  in  FIG.  21   , adapted from  FIG.  5   .  FIG.  21    shows various views of an example of the electric shaver  210  according to one embodiment of the invention. View  213  is a front view of the shaver  210 , view  212  is a side view, and view  211  is a rear view of the shaver  210 . View  214  is a top view of the foil  15 , which is usually in contact with the skin and the hair, and view  215  is a bottom view showing connector  18  for connecting to a power source. The display  45  is shown attached and as an integral part of the shaver enclosure. In one embodiment, the display can be folded, for example in order to allow small packaging and small space for storing. The display  45  is shown folded in views  220  in  FIG.  22   . 
     In the cases wherein a conductive medium, such as a dedicated cable, is used as the communication medium  37 , it may be preferred to use the same cable to concurrently carry power between the shaver and the display unit, thus obviating the need for two cables, one for providing power and one for communication purposes. In one embodiment, the display unit is adapted to drive power to the cable for powering the electric shaver. Such power can be used only for powering the camera module and related functionalities, or for fully powering the electric shaver, including its motor  26  driving the cutters  28 . A display unit  230  adapted to supply power over the cable is shown in  FIG.  23   . A power/data combiner unit is disposed, connected between the transceiver  34  and the power supply  44 . The power from the power supply  44  required to power the shaver is fed to the combiner  232  through the connection  233 . The communication signal to or from the transceiver  34  is also connected to the combiner  232 . The power signal and the digital data communication signal are combined by the combiner  232  and the combined signal is coupled to the cable via a connector  231 . 
     A corresponding electric shaver  240  is shown as shaver  240  in  FIG.  24   . Connector  243  is used to connect to the cable carrying both power and communication signals. The incoming power is separated by the power/data splitter  244  and fed to the power supply  242  in the camera module  241 . The power/data splitter  244  serves as the mating and complementary unit for the combiner  232 . The power supply  242  is adapted to power both the motor  26  (via the battery  24 , if required, or otherwise directly without any battery in between) and the camera module  241  from the power signal carried over the cable. The power/data splitter is further operating to transparently pass the communication signal between the cable (via connector  243 ) and the transceiver  34 . 
     An exemplary system  250  is shown in  FIG.  25   . A single cable  251  is shown to connect between the display unit  230  and the electric shaver  240  described above, carrying both power and digital data signals. The display unit  230  is AC power fed via cable  161   b  connected to AC power outlet  163  via a connector or plug-in power supply  162 . Further, the AC power connection is also used to power the electric shaver  240  via cable  251 , shown connecting the shaver  240  via connector  243  and to the connector  231  in the display unit  230 . Hence, only a single cable  251  is conveniently connected to the shaver  240 . 
     In one embodiment according to the invention, the power and communication signals are carried over the single cable  251  using separated and dedicated conductors. For example, cable  251  may include four distinct wires, out of which two (or more) are used for carrying the communication signal, while the other two wires are used to carry the power signal from the display unit  230  to the shaver  240 . In such configuration, specific hardware for implementing the combiner  232  and the splitter  244  may not be required, since power connection will make use of separate pins and contacts in the connectors  231  and  243 , while the communication signal will use distinct and different pins. 
     In an alternative embodiment, the power and communication signals are carried over the wires in the cable using Frequency Division Multiplexing (FDM, a.k.a. Frequency Domain Multiplexing). In such implementation, the power and the communications signals are carried each in its frequency band (or a single frequency) distinct from each other. For example, the power signal can be a DC (Direct Current) power (effectively 0 Hz), while the communication signal is carried over the 100 Hz-10 MHz (or 4-30 MHz) frequency band, which is distinct and above the DC power frequency. In one example, a relatively high voltage such as a 120 VDC can be used in order to compensate for the wiring resistance caused voltage drops. In some installations, safety standards such as UL/IEC 60950 and EN60950 may limit the voltage level in many applications to 60 VDC. A telephony common 48 VDC voltage level may also be used. 
     Similarly, AC power signal may be used, such as 50 Hz or 60 Hz. Commonly the combiner  232  and splitter  244  in such environment are implemented using set of filters. For example, a low pass filter (LPF) similar to filter  141  described above can be used in the power path, connecting the cable to the power supply  44  or  242 , passing only the DC power or low-frequency AC signals. An high pass filter (HPF) similar to filter  142  described above can be used in the communication path, connecting the cable to the transceiver  34  in both the shaver  240  and the display unit  230 . 
     Another technique for carrying power and data signals over the same conductors is known as Power over Ethernet (PoE) (i.e., Power over LAN—PoL) and standardized under IEEE802.3af and IEEE802.3at, also explained in U.S. Pat. No. 6,473,608 to Lehr et al. titled: “Structure Cabling System”, which describes a method to carry power over LAN wiring, using the spare pairs and the phantom mechanism. The latter makes use of center-tap transformers. The powering scheme described above may use this standard as well as using non-standard proprietary powering schemes. In one example, USB (Universal Serial Bus) connection is used for both power and digital data. 
     While the invention has been exampled above with regard to the case wherein the electric shaver is powered from the display unit via the interconnecting cable carrying the communication signal, it is apparent that equally the power can be fed from the electric shaver to the display unit. In this case the splitter  244  and the combiner  232  will be switched with each other, so that combiner  244  will be disposed within the display unit  230  (as a substitute to combiner  232 ), and the combiner  232  will be disposed within the electric shaver  240  (as a substitute to splitter  244 ). The power supplied will be adapted accordingly. 
     While the invention has been exampled above with regard to processing, compressing and decompressing, transmitting, receiving and displaying the image in a represented as a digital data, it will be appreciated that the invention equally applies to the case wherein the image is in full or in part of the system is carried, processed, compressed and decompressed, transmitted, received and displayed as analog video signal. In the case of an analog transmission, the transceiver  34  will be an analog transceiver and the image will be carried in an analog form over the communication medium  37 . Similar to the above disclosure, in such a case the communication can be wireless through the air such as using radio-frequency, or over metallic medium such as wires. 
     The camera module  31  or the display unit  40  may include visual indicators for allowing the user to easily observe the module status. Such indicators may be LEDs (Light Emitting Diode) known in the art, and are coupled to be controlled by the control  35  in the shaver  30  or by the control  43  in the display unit  40 , and can further be part of user interface functionality  47  or  48 . The visual indicators may be used to indicate the following module status: 
     a. Power. The visual indicator may be used to indicate the existence of power in the module to power its internal active circuits. Various techniques have been described above for powering a module. Regardless of the power source to the module (as described above), such indication will ensure that indeed power reaches the module. Such indication is commonly marked as ‘POWER’ or ‘ON’. The indicator can be coupled directly to the power signal feeding the module or alternatively coupled to the power supply output. In the latter case, the indicator is used to indicate both the power signal availability and the proper operation of the internal power supply  36  or  44 . 
     b. Proper operation. A visual indicator may also be used to indicate the proper operation of part or all of the electronic circuits integrated within the module. The electronic circuits within the module may support self-test or any other built-in diagnostics means, wherein the test results will be signaled by a visual indicator. 
     c. Communication status. In the case wherein the module uses communication functionality, the module may indicate the availability and the status of the communication. In general, two communication links may be involved. One communication link refers to the availability of a data communication signal over the communication medium  37  so as to indicate that transceiver  34  receives a valid communication signal. The other communication link involves the communication between the shaver and the display unit. Such status indication can be based on a ‘Link Pulse’ mechanism commonly used in Ethernet IEEE802.3 10/100BaseT based networks. 
     The above various states may be each represented by a single dedicated single-state indicator. However, in order to reduce complexity, known techniques are commonly used in order to combine signals. Such techniques may use different colors (of the same indicator), different intensity levels, variable duty-cycle and so forth. While visual indicators have been described, other indicating methods may be used such as audible tones (as stand alone or combined with visual). 
     While the invention has been exampled above with regard to displaying the captured image on a dedicated display, it will be appreciated that the invention equally applies to the case wherein the standard displays are used. In one embodiment, the electric shaver outputs a standard video signal, which can be displayed using any displaying device that supports this video interface. For example, a standard television set can be as a display apparatus. In this case, the transceiver  234  and connector  38  are adapted to output this standard video signal. Such analog interfaces can be composite video such as NTSC, PAL or SECAM formats. Similarly, analog RGB, VGA (Video Graphics Array), SVGA (Super Video Graphics Array), SCART, S-video and other standard analog interfaces can be used. Further, personal computer monitors, plasma or flat panel displays, CRT, DLP display or a video projector may be equally used. Connector  38  will be implemented as suitable standard analog video connector. For example, F-Type, BNC (Bayonet Neill-Concelman), RCA, and similar RF/coax connectors can be used. An electric shaver  260  is shown in  FIG.  26   , including F-Type connector  261  for connecting to a standard analog video displaying device. In one embodiment, a standard digital video interface is used. In this case, the transceiver  34  and connector  38  are adapted to support the digital video interface. In one example, a IEEE1394 interface, also known as FireWire™, is used, as shown for electric shaver  270  is shown in  FIG.  27   , including an IEEE1394 connector  271  for connecting to a standard digital video displaying device. Other digital interfaces that can be used are USB, SDI (Serial Digital Interface), FireWire, HDMI (High-Definition Multimedia Interface), DVI (Digital Visual Interface), UDI (Unified Display Interface), DisplayPort, Digital Component Video and DVB (Digital Video Broadcast). 
     While the invention has been exampled above with regard to electric shaver, it will be appreciated that the invention equally applies to non-electric shavers such as razors. 
     While the invention has been exampled above with regard to shavers and other hair removal devices, it will be appreciated that the invention equally applies to oral hygiene devices such as toothbrush. In the case of electrical toothbrush, the cutter mechanism  28  is replaced with a brushing mechanism. Such a device helps in better visualization of the mouth cavity, and in particular of the brushed teeth and gums. 
     All publications, patents, and patent applications cited in this specifications are herein incorporated by reference as if each individual publication, patent, or patent application were specifically and individually indicated to be incorporated by reference and set forth in its entirety herein. 
     Those of skill in the art will understand that the various illustrative logical blocks, modules and circuits described in connection with the embodiments disclosed herein may be implemented in any number of ways including electronic hardware, computer software, or combinations of both. The various illustrative components, blocks, modules and circuits have been described generally in terms of their functionality. Whether the functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans recognize the interchangeability of hardware and software under these circumstances, and how best to implement the described functionality for each particular application. 
     Although exemplary embodiments of the present invention have been described, this should not be construed to limit the scope of the appended claims. Those skilled in the art will understand that modifications may be made to the described embodiments. Moreover, to those skilled in the various arts, the invention itself herein will suggest solutions to other tasks and adaptations for other applications. It is therefore desired that the present embodiments be considered in all respects as illustrative and not restrictive, reference being made to the appended claims rather than the to foregoing description to indicate the scope of the invention. 
     It will be appreciated that the aforementioned features and advantages are presented solely by way of example. Accordingly, the foregoing should not be construed or interpreted to constitute, in any way, an exhaustive enumeration of features and advantages of embodiments of the present invention. 
     The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope. 
     Public Notice Regarding the Scope of the Invention and Claims 
     While the invention has been described in terms of preferred embodiments and generally associated methods, the inventor contemplates that alterations and permutations of the preferred embodiments and methods will become apparent to those skilled in the art upon a reading of the specification and a study of the drawings. 
     Accordingly, neither the above description of preferred exemplary embodiments nor the abstract defines or constrains the invention. Rather, the issued claims variously define the invention. Each variation of the invention is limited only by the recited limitations of its respective claim, and equivalents thereof, without limitation by other terms not present in the claim. In addition, aspects of the invention are particularly pointed out in the claims using terminology that the inventor regards as having its broadest reasonable interpretation; the more specific interpretations of 35 U.S.C. section.112 (6) are only intended in those instances where the term “means” is actually recited. The words “comprising,” “including,” and “having” are intended as open-ended terminology, with the same meaning as if the phrase “at least” were appended after each instance thereof.