Abstract:
A translator is provided for reading the bar codes displayed on the screen of a portable electronic device which utilizes a digital camera and/or a microphone responsive to tones from the portable electronic device to process and convert the information received from the camera and/or the microphone to a form readable by a reflective bar code reader without requiring any modification of the bar code reader.

Description:
BACKGROUND 
   Most of the bar code readers currently in widespread commercial use are designed to emit a beam of laser light which is swept across a target in a single or multiple scan. A detector, which is tuned to the same frequency as the emitter, is focused on the region being scanned or swept by the emitting beam of laser light. As the beam moves over a dark bar, the intensity of the signal received by the detector drops. As the beam moves over a bar which is lighter (preferably, white) the intensity of the received signal increases. This digital bright-dim or on-off sequence carries the recorded information, usually translated into a string of numbers. Black and white bars tend to generate the best differentiation in intensity, however, any high reflective color paired with a much lower reflective color will generally suffice. 
   Portable electronic devices, such as wireless cell phones, PDA devices, pagers, or combinations of these and other devices, are in widespread use. Most such portable electronic devices include a display screen for displaying information and pictures on them. Most electronic devices, and in particular cellular phones produced in volume for general use, employ screens designed primarily for viewing based on the light actively emitted by the screen, and not on reflected light. 
   In addition, the predominant technology employed in the manufacture of such screens is a back-lit LCD screen. A back-lit LCD screen employs multiple layers of polarizing material and liquid crystal filters to control the amount of light transmitted from an underlying light source as the light passes outwardly through a multitude of filtering layers. Because the emission of a bright line on part of this display does not necessarily correlate to an increase in surface reflectivity, and vice-versa, bands of light and dark are not consistently or accurately read by laser-based reflection sensing scanners. The multiple layers of materials used in back-lit LCD screens also produce strong reflections which are not effectively modified by changes in the underlying layers which produce the changes in the outwardly transmitted light. As a consequence, many bar code readers presently in commercial use at retail and point-of-sale operations are not able to accurately read visual images including a bar code pattern of bars or squares when such bar codes are displayed on the screen of a portable electronic device, such as a cell phone. 
   The ability of existing scanner systems to receive bar code information displayed on a cell phone screen, without alteration of the point of sale (POS) scanner systems themselves, is a commercially desirable goal. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a block diagram of an embodiment of the invention; 
       FIG. 2  is a block diagram of another embodiment of the invention; and 
       FIG. 3  is a perspective diagrammatic representation of the embodiments of  FIGS. 1 and 2 . 
   

   DETAILED DESCRIPTION 
   Reference now should be made to the drawings, in which the same reference numbers are used throughout the different figures to designate the same or similar components. Promotional offers, coupons, tickets and other items used for carrying out promotional offers and retail or sporting event and travel functions typically have been carried out using paper. Coupons frequently are provided in weekly circulars or newspapers, or through promotional mailings for use by consumers. In addition, rebates, discounts and tickets for sporting events and travel typically have been handled by way of paper documentation. With the advent of the Internet or worldwide web, the ability to transfer and download coupons, promotional items and tickets to a computer or other personal electronic device is beginning to supplant and eliminate many paper coupon transactions for transactions taking place on the internet. However, the redemption of coupons electronically transmitted at conventional physical establishments (restaurants or “brick and mortar” stores) generally requires the electronically transmitted coupons to be physically printed on paper for presentation at the point of sale. 
   Whenever coupons, tickets or other items such as rebate information is transferred from some central control source to a portable electronic device such as a wireless cell phone, PDA, pager or combination of these, or other devices and functionalities having a display screen, the coupon, ticket or the like generally is identified by means of a conventional bar code display, either in whole or in part. The embodiments of the invention are directed to systems for facilitating the transfer of coupons or other bar code displayed items, such as a ticket or rebate, from the portable electronic device to a conventional point-of-sale laser scanner system. 
   As noted above, the typical display used with a wireless portable electronic device is not one which accurately and consistently can be read by the conventional reflective bar code scanners which are in widespread use in retail establishments and other point-of-sale locations. The invention which is disclosed in  FIGS. 1 through 3  is designed to permit the transmission of coupons or other bar coded information to a portable electronic device  10  for display on the screen of that device. No alteration in the manner of formulation, transmission, reception and display of this information is required; and the portable electronic device or cell phone  10  displays the bar coded information on a screen, producing it in a conventional manner. 
   As shown in  FIG. 1 , in order to allow the use of a conventional laser reflective bar code scanner or other type of conventional bar code scanners to obtain the data displayed on the screen of a cell phone or portable electronic device  10 , a digital camera  12  is employed to capture a digital image of the bar code information which is displayed on the screen of the device  10 . The camera  12  captures a digital image of the emissive image produced on the screen the cell phone  10  or other portable electronic device. Specifically, the digital image which is captured is able to detect light and dark bars or boxes used in bar code patterns. 
   The captured digital image  14  then is processed using known and commercially utilized techniques to decode the signal. This is accomplished through conventional means by a computer  16 . This information, for a bar code image in the form of light and dark bars or black and white bars, then is supplied by the computer  16  to a display  18  as a regenerated bar code displayed on a screen  19 , which is designed to be readable by a conventional laser reflective bar code scanner device  20 . The screen  19  of the display  18  may be a reflected light LCD display, or any image display which is capable of providing reflective characteristics capable of detection by the conventional bar code scanner  20 . 
   Alternatively as shown in  FIG. 2 , the system may be used to detect a sequence of tones emitted by the cell phone  10  or other portable electronic device. When this type of system is employed to detect tones, the device  10  is placed adjacent a microphone  30  to receive the tone sequence activated by the user. The tones which are received by the microphone  30  then are supplied to a tone decoder  32  of a conventional type to decode the tone sequence (either directly or in conjunction with a computer  16 ) and produce an alphanumeric or numeric sequence equivalent to the numerical sequence contained in a bar code sequence. The output of the tone decoder  32  is supplied to a computer  16 , which once again receives the numeric or alphanumeric sequence and provides an output signal to the display  18  for regenerating the bar code to display the bar code on a screen or display area  19  designed to be readable by a conventional laser bar code reflective scanner device. The screen  19  shown in  FIG. 2  is similar to or the same as the screen  19  in  FIG. 1 , and replaces the potential for erroneous readings which would be obtained if the bar code scanner  20  were to scan the screen on the portable electronic device  10  directly, without the intervening system which is shown in  FIGS. 1 and 2 . 
     FIG. 3  is a diagrammatic top perspective view of the physical configuration of apparatus which is used in conjunction with the systems of the type shown in  FIGS. 1 and 2 . In  FIG. 3 , a base unit  40  which typically includes the computer  16  shown in  FIGS. 1 and 2 , and which also may include the digital image processor  14  or the tone decoder  32  shown in  FIGS. 1 and 2 , constitutes a base unit for accommodating the other components of the system. 
   In the center of the base unit  40 , there is a receptacle  42  which is configured to accommodate a portable electronic device, such as a cell phone  10 . The cell phone  10 , or other portable electronic device, is placed in the receptacle  42  to locate the screen of the device in close proximity to and aligned with a digital imaging camera or microphone  12 / 30  positioned to view (or pick up audio tones from) the area where the screen is located. The camera  12 , when a camera is used in the device, is located to focus on the screen of the device  10  to capture a digital image of the screen. If a microphone  30  is used, either independently or in association with a camera, the microphone  30  is positioned and adjusted to receive the sequence of tone signals from the device  10  if an audible tone or output from the device  10  is employed. 
   The display unit  18 , with its screen  19 , is located adjacent the well  42  and spaced a slight distance from it, as illustrated in  FIG. 3 . The system operates as described in conjunction with  FIGS. 1 and 2 . 
   Alternatively, the code in the form of a decoded digital image effected by the digital image element of  FIG. 1 , or in the form of a decoded tone sequence,  2  may be retransmitted by a laser emitter in the form of a re-broadcaster  17  as part of the display unit  18 . Such a re-broadcaster simulates a pulsed light return signal of the type produced when a laser scanner  20  scans across reflective and non-reflective bars. As a consequence, when the laser scanner  20  is pointed at the re-broadcaster  17 , it receives the same sequence of pulses which would be received had the scanner  20  scanned a readable reflective bar code on the screen  19 . The re-broadcaster  17  in such a case takes the place of a display screen  19 , and is considered a full equivalent to such a display screen  19 . Alternatively, the re-broadcaster  17  may include a separate light emitter (infrared or visible LED, for example) to produce light pulses readable by a conventional laser bar code scanner. 
   In common usage, a cell phone owner or owner of another portable electronic device downloads a coupon containing a bar scan code onto the cell phone or portable electronic device, utilizing existing cell phone telecommunications protocols for images and program instructions. Software installed on the user&#39;s cell phone then enables the user to call up and display this image at will. When the owner of the cell phone wishes to present the coupon for redemption at a point of sale or other verification point, the user places the cell phone  10  in the well  42  on top of the base unit  40 , as depicted in  FIG. 3 . A clerk or operator at the retail establishment or point of sale then aims a conventional scanner device  20  at the decoder screen  19  (whether this is a display screen or a “re-broadcaster” 17 ), and either receives a transmitted signal (rebroadcast) of pulses that register as a conventional bar code scanned, or the scanner  20  scans the image  19  (or  17 ) as with any conventional bar code scanning on a product or paper coupon. The encoded information from the bar code then is transferred from the cell phone to the point of sale or verification equipment for subsequent use in the particular transaction which is employed. 
   The foregoing description of the embodiments of the invention is to be considered as illustrative and not as limiting. Various changes and modifications will occur to those skilled in the art for performing substantially the same function, in substantially the same way, to achieve substantially the same result, without departing from the true scope of the invention as defined in the appended claims.