JP2005107576A - Bar code display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bar code display device which can display a far larger amount of information compared with the number of patterns of two dimensional bar code. <P>SOLUTION: The bar code display device is provided with; a display element 2 which has a plurality of display factors arranged in a plurality of rows and columns, and displays the two dimensional bar code corresponding to the code pattern data supplied from the outside by the plurality of display factors and; a display control means 10 which supplies a plurality of code pattern data corresponding to two dimensional bar code of a plurality of patterns showing the one information to the display element 1 one by one for each of a plurality of split pieces of time which is obtained by splitting one period of information display time for displaying one piece of information into multiple, and makes the display element 2 display one piece of information consisting of a plurality of patterns of the two dimensional bar codes during the one period of information display time. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a barcode display device that displays a two-dimensional barcode.

  The barcode includes a one-dimensional barcode represented by a plurality of code elements arranged in one direction and a two-dimensional barcode represented by a plurality of code elements arranged in a row direction and a column direction. Is also displayed by printing (see Patent Document 1).

The two-dimensional barcode has a larger amount of display information than a one-dimensional barcode and is advantageous for authentication of a large amount of information.
JP 2000-182086 A

  However, the information that can be displayed by the printed two-dimensional barcode is information on the number of patterns corresponding to the number of code elements arranged in the row direction and the column direction, and it is not possible to display information exceeding the number of patterns. Can not.

  An object of the present invention is to provide a barcode display device capable of displaying a large amount of information much larger than the number of patterns of a two-dimensional barcode.

  The barcode display device of the present invention has a plurality of display elements arranged in a plurality of rows and a plurality of columns, and displays a two-dimensional barcode corresponding to code pattern data supplied from the outside by the plurality of display elements. A plurality of code pattern data respectively corresponding to a plurality of patterns of two-dimensional barcodes representing the one information for each of a plurality of divided times obtained by dividing a display information and one information display time for displaying one information. And a display control unit that sequentially supplies the display element and displays the one information including the plurality of patterns of two-dimensional barcodes during the one information display time.

  In the barcode display device of the present invention, the display element has a gradation display function, and the display control means supplies code pattern data including white and black and at least one gradation therebetween to the display element. It is preferable to supply.

  In addition, the display control unit may include at least a plurality of code pattern data to be supplied to the display element every time the display element displays one piece of information including the plurality of patterns of two-dimensional barcodes a predetermined number of times. One is switched to data corresponding to a two-dimensional barcode of another pattern, or at least one of a plurality of code pattern data to be supplied to the display element is changed every other predetermined time. It is preferable to switch to data corresponding to a two-dimensional barcode.

  The barcode display device according to the present invention is a two-dimensional bar having a plurality of patterns representing the one information for each of a plurality of divided times obtained by dividing the information display time for displaying one information into a plurality of times by the display control means. A plurality of code pattern data respectively corresponding to codes are sequentially supplied to the display element, and the one information consisting of the two-dimensional barcode of the plurality of patterns is displayed on the display element during the one information display time. A much larger amount of information than the number of two-dimensional barcode patterns displayed by the display element can be displayed.

  In this barcode display device, the display element has a gradation display function, and the display control means supplies code pattern data including white and black and at least one gradation therebetween to the display element. In this way, the number of patterns of each two-dimensional barcode displayed for each of the divided times is set to the number of display elements of the display element, that is, the code element of the two-dimensional barcode displayed by the display element. More than the number of patterns corresponding to the number, a larger amount of information can be displayed.

  In addition, the display control unit may include at least a plurality of code pattern data to be supplied to the display element every time the display element displays one piece of information including the plurality of patterns of two-dimensional barcodes a predetermined number of times. One is switched to data corresponding to a two-dimensional barcode of another pattern, or at least one of a plurality of code pattern data to be supplied to the display element is changed every other predetermined time. It is preferable to switch to data corresponding to a two-dimensional barcode, and in this way, a combination of two-dimensional barcodes of a plurality of patterns representing one piece of information is determined every predetermined number of times of authentication information display or predetermined. It can be changed every hour to obtain high security.

  An embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic diagram of a barcode authentication system. This barcode authentication system includes a barcode display device 1 and a barcode authentication device 11.

  The barcode display device 1 has a plurality of display elements 2a arranged in a plurality of rows and a plurality of columns, and displays a two-dimensional barcode corresponding to code pattern data supplied from outside by the plurality of display elements 2a. A plurality of code pattern data respectively corresponding to a plurality of patterns of two-dimensional barcodes representing the one information for each of a plurality of divided times obtained by dividing the display element 2 and one information display time for displaying one information. Are sequentially supplied to the display element 2, and the display control means 10 is configured to cause the display element 1 to display the one information composed of the two-dimensional barcode of the plurality of patterns during the one information display time. .

  FIG. 2 is a perspective view of the display element 2 of the bar code display device 1. The display element 2 includes, for example, square display elements 2a each having a vertical and horizontal width of 2 to 5 mm and a very small interval of about 5 to 10 μm. The display unit is arranged in 8 rows × 8 columns.

  The display element 2 is, for example, a transmissive simple matrix liquid crystal display element, and its internal structure is not shown, but is joined via a frame-shaped sealing material 5 and provided in a region surrounded by the sealing material 5. Eight transparent signal electrodes along the column direction are formed in parallel with each other on one of the opposing surfaces of the pair of transparent substrates 3 and 4 on the opposite side of the display surface with the liquid crystal layer interposed therebetween. Eight transparent scanning electrodes along the row direction are formed in parallel with each other on the other of the facing surfaces, and display elements 2a arranged in 8 rows × 8 columns are formed by regions of these electrodes facing each other. .

  The liquid crystal display element 2 is, for example, a TN (twisted nematic) type in which the liquid crystal molecules of the liquid crystal layer are twist-aligned between a pair of substrates 3 and 4 with a twist angle of substantially 90 °, or the liquid crystal A non-twisted homogeneous alignment type in which molecules are aligned homogeneously in one direction with the molecular long axis aligned, and although not shown in the figure, a pair of polarizing plates is provided on the outer surfaces of the pair of substrates 3 and 4, respectively. However, the liquid crystal display elements of a normally white mode or a normally black mode are arranged so that each transmission axis is directed in a predetermined direction.

  In addition, one of the pair of substrates 3 and 4, for example, the substrate 3 on which the signal electrode along the column direction is formed has a driver mounting portion that projects outward from the other substrate 4 at one end edge in the column direction. 3a.

  The driver mounting portion 3a includes the signal electrode lead wires 6 respectively derived from the plurality of signal electrodes, and the plurality of the other substrates 4 via a cross connection portion (not shown) in the substrate bonding portion by the sealing material 5. A scan electrode lead wiring 7 connected to each of the scan electrodes and a plurality of external circuit connection wirings 8 are formed, and these wirings 6, 7, 8 are formed of an LSI mounted on the driver mounting portion 3 a. A display driver 9 is connected.

  In the liquid crystal display element 2, 64-bit code pattern data of 8 rows × 8 columns is supplied from the external display control means 10 to the display driver 9, and the display driver 9 applies between the electrodes of each display element 2a. An electric field is controlled to display a two-dimensional bar code corresponding to the code pattern data. The display element 2a has no electric field in which liquid crystal molecules are in an initial alignment state, and the liquid crystal molecules are placed on the substrates 3 and 4 Of the display elements 2a to which the electric field for rising and orientation is applied, one display element 2a displays a white code element, and the other display element 2a displays a black code element.

  On the other hand, the display control means 10 is represented by an array pattern of white and black code elements displayed by the display elements 2a of 8 rows × 8 columns of the liquid crystal display element 2 although its specific configuration is not shown. Corresponding to a pattern data storage unit in which 64 types of code pattern data are registered in advance and a plurality of patterns of two-dimensional barcodes representing one piece of information among the 64 types of code pattern data registered in the storage unit Data for selecting a plurality of code pattern data and sequentially supplying the plurality of code pattern data to the liquid crystal display element 2 for each of a plurality of divided times obtained by dividing one information display time for displaying the one information. The information including the plurality of patterns of two-dimensional barcodes during the one information display time. It is displayed on the crystal display element 2.

  The barcode display device 1 is a two-dimensional bar having a plurality of patterns representing one piece of information for each of a plurality of divided times obtained by dividing the information display time for displaying one piece of information by the display control means 10. A plurality of code pattern data respectively corresponding to the codes are sequentially supplied to the liquid crystal display element 2, and the one information consisting of the two-dimensional barcode of the plurality of patterns is supplied to the liquid crystal display element 2 during the one information display time. Therefore, a much larger amount of information than the number of two-dimensional barcode patterns displayed by the liquid crystal display element 2 can be displayed.

  FIG. 3 is a schematic diagram showing an example of information display by the barcode display device 1. Here, one information display time T for displaying one information is divided into five, and each of the divided times t1, t2, t3 is divided into five. , T4, t5, five code pattern data respectively corresponding to the five patterns of two-dimensional barcodes representing the one information are sequentially supplied to the liquid crystal display element 2, and during the one information display time T In the example, one piece of information consisting of the five patterns of two-dimensional barcodes A1, A2, A3, A4, and A5 is displayed on the liquid crystal display element 2.

  This information display example is a two-dimensional bar displayed by the liquid crystal display element 2 in order to display on the liquid crystal display element 2 one piece of information consisting of five patterns of two-dimensional bar codes A1, A2, A3, A4, A5. Information on the number of patterns five times the number of patterns of codes can be displayed.

  In this embodiment, as described above, the liquid crystal display element 2 has a display unit composed of the display elements 2a arranged in 8 rows × 8 columns. By displaying the two-dimensional barcodes A1, A2, A3, A4, and A5 of the pattern, 320-bit information that is five times the number of display elements (64 elements) of the liquid crystal display element 2 can be displayed.

  The number of two-dimensional barcodes displayed on the liquid crystal display element 2 during the one information display time T may be any other number as long as it is two or more. For example, the liquid crystal during the one information display time T When two-dimensional barcodes of two patterns are displayed on the display element 2, information on the number of patterns twice the number of patterns of the two-dimensional barcode displayed on the liquid crystal display element 2, that is, 128-bit information is displayed. can do.

  Next, the barcode authentication device 11 of the barcode authentication system shown in FIG. 1 will be described. This barcode authentication device 11 reads the display information of the barcode display device 1 supplied manually or by automatic transfer means. The bar code reading unit 12 for sequentially reading a plurality of patterns of two-dimensional bar codes displayed on the liquid crystal display element 2 of the bar code display device 1 and the bar code reading unit 12 read the authentication information. The authentication information determination means 15 determines the authentication information corresponding to the two-dimensional barcode of the plurality of patterns.

  The bar code reading unit 12 includes a light source 13 that illuminates the liquid crystal display element 2 of the bar code display device 1 from one surface side thereof, and a photoelectric conversion element having the same number as the plurality of display elements 2a of the liquid crystal display element 2. (Not shown) includes a barcode reading element 14 arranged in the row direction and the column direction in the same arrangement pattern as the display element 2a. The light source 13 and the barcode reading element 14 are arranged in the barcode. The display device 1 is disposed so as to face the rear surface and the display surface of the liquid crystal display element 2 with the supply position of the display device 1 interposed therebetween.

  Further, although the specific configuration of the authentication information determination unit 15 is not illustrated, 64 types of authentication corresponding to the 64 types of code pattern data registered in the display control unit 10 of the barcode display device 1 are provided. Authentication corresponding to a plurality of patterns of two-dimensional barcodes based on predetermined determination conditions from a plurality of authentication data corresponding to a plurality of patterns of barcodes read by the barcode reading means 12 in which data is registered It consists of an authentication circuit that determines information.

  FIG. 4 shows an example of use of the bar code authentication system. Here, a user who has the right to enter a house resident or a confidential material room possesses the key card 16, and the key card 16 is used as the key card. The door lock cancellation | release system which authenticates with the authentication apparatus 18 and cancels | releases a door lock is shown.

  The key card 16 is formed of a rectangular thin case having a predetermined size, and has a display window 17 and a lighting window (not shown) corresponding to the display unit of the liquid crystal display element 2 of the barcode display device 1 on the front and rear surfaces thereof. The bar code display device 1 is provided in the card body provided with the rear face and the display surface of the liquid crystal display element 2 facing the lighting window and the display window 17, respectively.

  Although not shown in the figure, the key card 16 is slid to a position where the display window 17 is opened when the key card 16 is used, and slid to a position where the display window 17 is closed when not used. And a power switch that is turned on / off in conjunction with opening and closing of the display surface cover.

  Then, the display control means 10 of the barcode display device 1 turns on the code display switch (opens the display surface cover), from among the 64 types of code pattern data registered in the pattern data storage unit, A plurality of patterns representing one piece of information (hereinafter referred to as personal information) set for each key card holder, for example, five code pattern data respectively corresponding to five patterns of two-dimensional barcodes are set as preset selection conditions. Based on the selection, the display control for sequentially supplying the selected five code pattern data to the liquid crystal display element 2 is started every divided time obtained by dividing one information display time for displaying the personal information into five, The display control is repeated until the power switch is turned off (the display surface cover is closed).

  That is, the key card 16 sequentially supplies the five code pattern data from the display control means 10 to the liquid crystal display element 2 when the power switch is turned on, and the personal information consisting of the five patterns of two-dimensional barcodes. The liquid crystal display element 2 is repeatedly displayed, and the display of the personal information is continued until the power switch is turned off.

  On the other hand, the key card authenticating device 18 includes the bar code authenticating device 11 in the case having the key card inserting portion 19, the light source 13 constituting the bar code reading means 12, and the bar code reading element 14. The key card 16 inserted in the key card insertion portion 19 is disposed so as to face the daylighting window and the display window 17, and the authentication information determination means 15 of the barcode authentication device 11 is inserted. From the display information of the key card 16, that is, from the five types of authentication data corresponding to the five patterns of barcodes read by the barcode reading means 12, the two patterns of the five patterns are determined based on predetermined determination conditions. The authentication information corresponding to the barcode is determined.

  The release of the door lock by this door lock release system will be described. In the key card 16, the power switch is turned on by opening the display surface cover (not shown), and the liquid crystal display element 2 has the five patterns of two-dimensional barcodes. Are repeatedly inserted and inserted into the key card insertion unit 19 of the key card authentication device 18.

  The key card authentication device 18 detects the insertion of the key card 16 into the key card insertion unit 19 and starts reading the bar code, and the liquid crystal display element 2 of the key card 16 sequentially displays the 5 After reading the pattern two-dimensional barcode, the authentication information corresponding to the five-pattern two-dimensional barcode is determined, and when the determined authentication information matches the pre-registered key card holder information, A lock release signal is output to the automatic door lock device.

  The key card 16 inserted into the key card insertion unit 19 of the key card authentication device 18 is pulled out from the key card insertion unit 19 after the door lock is released by the automatic door lock device.

  In this door lock release system, one information display time of the key card 16, that is, the display time of personal information consisting of the five patterns of two-dimensional barcodes is set to 1 second or less, preferably 1/10 seconds or less. In this way, the authentication time of personal information by the key card authentication device 18 can be made extremely short, and the door lock can be quickly released.

  As described above, this door lock release system is for releasing the door lock by authenticating the display of the key card 16 provided with the barcode display device 1 by the key card authentication device 18 provided with the barcode authentication device 11. Since the bar code display device 1 displays much more information than the number of patterns of the two-dimensional bar code displayed by the liquid crystal display element 2, it is difficult to produce a forged key card, Therefore, it has sufficient security.

  The barcode authentication system is not limited to the door lock release system shown in FIG. 4, and can be widely used for authentication of various information such as business transaction information.

  Further, the bar code display device 1 of the above embodiment displays a two-dimensional bar code by the liquid crystal display element 2, and the liquid crystal display element 2 is provided for each display element 2 a according to the electric field applied between the electrodes. It has a gradation display function for controlling display brightness to a plurality of gradations.

  Therefore, when the two-dimensional barcode is displayed by the liquid crystal display element 2, the display control means 10 of the barcode display device 1 displays the code pattern data including white and black and at least one gradation therebetween. It is preferable to be configured so as to be supplied to the element. By doing so, each two-dimensional barcode pattern displayed for each of a plurality of divided times obtained by dividing one information display time for displaying one information into a plurality of times The number is larger than the number of display elements of the liquid crystal display element 2, that is, the number of patterns corresponding to the number of code elements of the two-dimensional barcode displayed by the liquid crystal display element 2, and a larger amount of information can be displayed. .

  FIG. 5 shows an example of gradation display of a two-dimensional barcode by the barcode display device 1. This display example is applied to the liquid crystal display element 2 having the display elements 2 a of 8 rows × 8 columns with 0 gradation ( This is an example in which a two-dimensional barcode composed of code elements a0 to a7 having a total of 8 gradations (black) to 7 gradations (white) is displayed.

  In this display example, since the liquid crystal display element 2 can display 512 patterns of two-dimensional barcodes that are eight times the number of display elements (64 elements), two patterns of five patterns are displayed in one information display time. When displaying one piece of information consisting of a dimensional barcode, it is possible to display five times the information of 512 patterns, that is, 2560-bit information.

  As described above, when the liquid crystal display element 2 performs gradation display of the two-dimensional barcode, the display control means 10 of the barcode display device 1 has a number corresponding to the number of patterns of the two-dimensional barcode by gradation display. The code pattern data is registered, and among the code pattern data, a plurality of code pattern data respectively corresponding to a plurality of patterns of two-dimensional barcodes representing one information is selected and supplied to the liquid crystal display element 2, The authentication information determination unit 15 of the barcode authentication device 11 registers authentication data corresponding to the number of patterns of the two-dimensional barcode, and a plurality of barcodes corresponding to a plurality of patterns of barcodes read by the barcode reading unit 12. From the authentication data, the authentication information corresponding to the two-dimensional barcode of the plurality of patterns is based on a predetermined determination condition. It may be configured to determine.

  Further, when the barcode display device 1 is used in a barcode authentication system such as the door lock release system described above, the display control means 10 is formed of a plurality of patterns of two-dimensional barcodes on the liquid crystal display element 2. Each time a piece of information is displayed a predetermined number of times (for example, each time the power switch of the key card 16 is turned on or off in the door lock release system shown in FIG. 4), a plurality of pieces of information are supplied to the liquid crystal display element 2. At least one of the code pattern data is configured to be switched to data corresponding to a two-dimensional barcode of another pattern, or is supplied to the liquid crystal display element 2 at predetermined time intervals (for example, every day). Switching at least one of a plurality of code pattern data to data corresponding to a two-dimensional barcode of another pattern It is preferable that the combination of two-dimensional barcodes of a plurality of patterns representing one information is changed every predetermined number of times of displaying authentication information or every predetermined time, so that high security is achieved. Sex can be obtained.

  When the combination of a plurality of patterns of two-dimensional barcodes representing one piece of information is changed every predetermined number of display times of authentication information or every predetermined time, authentication information determination of the bar code authentication device 11 is performed. The authentication information determination condition by means 15 may be changed in correspondence with the combination change timing of the two-dimensional barcode, and in this way, the display information of the barcode display device 1 is correctly determined. Can do.

  The bar code display device 1 of the above embodiment includes the transmissive liquid crystal display element 2, but the display element for displaying the two-dimensional bar code is a reflective liquid crystal display element having a reflector on the rear side. In this case, the light source 13 and the barcode reading element 14 constituting the barcode reading means 12 of the barcode authenticating device 11 may be arranged so as to face the display surface of the reflective liquid crystal display element. .

  The display element is not limited to the simple matrix type liquid crystal display element 2 but may be an active matrix type liquid crystal display element.

  Further, the display element may be a dot matrix liquid crystal display element in which a plurality of pixels having an area smaller than that of the display element of the two-dimensional barcode are arranged in the row direction and the column direction. A two-dimensional barcode may be displayed by forming a plurality of arrayed barcode display elements by pixel groups each composed of a plurality of pixels and controlling an electric field applied between electrodes of these pixel groups.

  In addition, the dot matrix liquid crystal display element may be a color display element having a plurality of colors corresponding to a plurality of pixels, for example, three color filters of red, green, and blue. Each of the code display elements is formed by a pixel group including substantially the same number of red, green, and blue pixels, and a white display element is formed by applying a bright display electric field between the electrodes of all the pixels of the pixel group. The black code element may be displayed by applying a dark display electric field between the electrodes of all the pixels in the pixel group.

  Furthermore, the dot matrix liquid crystal display element may be one in which the plurality of pixels are arranged in a row direction and a column direction at a pitch of about 80 to 120 μm. By using the dot matrix liquid crystal display element, the barcode display is performed. The apparatus 1 can display not only a two-dimensional barcode but also an image such as a television image.

  Further, the display element may be a liquid crystal display element having a surface light source on the rear surface side, or a self-luminous display element such as an electroluminescence display element. In that case, the barcode reading means 12 of the barcode authentication device 11 is used. Need only be a bar code reader 14.

  Furthermore, the bar code display device 1 may be incorporated into a small electronic device having a display unit such as a mobile phone or a portable terminal, and in that case, a two-dimensional bar code using a display element of the small electronic device. Can be displayed.

  When the barcode display device 1 is incorporated in a small electronic device in this way, the barcode reading means 12 of the barcode authentication device 11 is displayed on the display unit of the small electronic device held in front of the barcode reading device 12. What is necessary is just to comprise so that it may read.

Schematic of a barcode authentication system. The perspective view of the display element used for the barcode display apparatus of the said barcode authentication system. The schematic diagram which shows the example of an information display by the said barcode display apparatus. The figure which shows the usage example of the said barcode authentication system. FIG. 3 is a diagram showing an example of gradation display of a two-dimensional barcode by the barcode display device 1.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Barcode display apparatus, 2 ... Liquid crystal display element, 2a ... Display element, 10 ... Display control means, 11 ... Barcode authentication apparatus, 12 ... Barcode reading means, 15 ... Authentication information determination means.

Claims (4)

  A display element having a plurality of display elements arranged in a plurality of rows and a plurality of columns and displaying a two-dimensional bar code corresponding to code pattern data supplied from the outside by the plurality of display elements, and displaying one information A plurality of code pattern data respectively corresponding to a plurality of patterns of two-dimensional barcodes representing the one information are sequentially supplied to the display element for each of a plurality of divided times obtained by dividing one information display time for A bar code display device comprising: display control means for causing the display element to display the one information composed of the two-dimensional bar code of the plurality of patterns during one information display time.   2. The display element according to claim 1, wherein the display element has a gradation display function, and the display control means supplies code pattern data including white and black and at least one gradation therebetween to the display element. The barcode display device described.   Each time the display control means causes the display element to display one piece of information consisting of a plurality of patterns of two-dimensional barcodes a predetermined number of times, at least one of the plurality of code pattern data supplied to the display element The bar code display device according to claim 1 or 2, wherein the data is switched to data corresponding to the two-dimensional bar code of the pattern.   The display control means switches at least one of a plurality of code pattern data supplied to the display element to data corresponding to a two-dimensional barcode of another pattern at predetermined time intervals. Or the barcode display apparatus of 2.

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