Image analysis – Applications – Personnel identification
Patent
1998-03-23
2000-09-12
Boudreau, Leo H.
Image analysis
Applications
Personnel identification
382189, 178 1803, 349 12, G06K 920
Patent
active
061188891
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a signature input apparatus and a signature verification system, and in particular relates to a signature verification system comprising: a signature input apparatus which displays the handwriting of a signature rendered by a coordinate pointer etc. as a liquid crystal representation and has a coordinate input unit for detecting the coordinate information of the handwriting; and a signature verifying apparatus which reads the coordinate information of the handwriting and verifies it with the handwriting coordinate information of signatures which have been registered beforehand.
BACKGROUND ART
FIG. 18 is a block diagram showing a conventional signature verification system. FIG. 19 is a block diagram showing the interior of a signature input apparatus constituting the signature verification system. As understood from FIGS. 18 and 19, the conventional signature verification system includes a signature input apparatus 100 and a signature verifying apparatus 106, and signature input apparatus 100 and signature verifying apparatus 106 are connected through a controller 103.
In signature input apparatus 100, a transparent, active type liquid crystal display unit 101 is mounted on the top of a coordinate input unit 102. This active type liquid crystal display unit 101 incorporates a reduced thickness-type backlight 113 and a backlight power source 114. A signature which has been written on a display area 107 of active type liquid crystal display unit 101 by a particular writer, using a dedicated pen 105 is transferred to a coordinate input area 115 in coordinate input unit 102, where the handwriting of the signature is read out, specifically, the X-coordinate and Y-coordinate and its writing pressure are detected by an X-axis driver circuit 116 and a Y-axis driver circuit 117, a transmission/reception circuit 118 and a CPU 119.
As stated above, the handwriting coordinate information and writing pressure data detected by coordinate input unit 102 are transferred to signature verifying apparatus 106 by way of controller 103, then therein, are used for signature registration and signature verification. At the same time, the data is used for the calculation of the handwriting coordinates in controller 103, the result being sent out to active type liquid crystal display unit 101 as its display data. Based on the transferred display data to liquid crystal display unit 101, the handwriting of the signature is displayed on display area 107 via display controller 111, memory 110, X-axis driver circuit 108 and Y-axis driver circuit 109.
By repeating the above cycle of operations quickly, the handwriting of the signature is displayed as a liquid crystal representation on display area 107 as if it were being written on a paper surface by a writing implement. Here, the active type liquid crystal display is one which displays characters and/or patterns etc., by optically changing, by providing an electric field or the like, the state of arbitrary dots inside the display dots which are arrayed matrix-wise on a plane defined by the X-axis and Y-axis. Signature input apparatus 100 may incorporate a character generator 112 for character fonts for displaying type characters.
On the other hand, sent out from signature verifying apparatus 106 are instructions such as the start of input of a signature (input start of coordinate input unit 102), transfer of the handwriting coordinate data to active type liquid crystal display unit 101, the end of input of a signature, and display deletion of active type liquid crystal display unit 101. Since signature input apparatus 100 incorporates a voice guidance unit 104 composed of an amplifier 121 and a speaker 120 for performing voice guidance, the operation can be guided not only by the liquid crystal display but also by voice guidance.
However, active-type liquid crystal display unit 101 used in a signature input apparatus 100 of the conventional type, has the following problems, as compared to an externally charged type liquid crystal sheet
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European Search Report for EP 97 93 0758 dated Aug. 25, 1999.
Abe Yutaka
Ikeda Masahiko
Izuno Akinobu
Sato Morio
Boudreau Leo H.
Kabushiki Kaisha Pilot
Werner Brian
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