BAR CODE READER AND IMAGE SENSOR USED FOR THE SAME

PROBLEM TO BE SOLVED: To provide a bar code reader which precisely reads the ITF code of wide width. SOLUTION: Plural line sensors 10a, 10b and 10c are provided for CCD 12 and a CCD driving circuit 14 sets exposure time different for the respective line sensors. Picture signals for the respective li...

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Bibliographic Details
Main Authors INOUE KATSUSHI, HATADA NAOKI, KOBAYASHI KEIICHI
Format Patent
LanguageEnglish
Published 18.03.1997
Edition6
Subjects
BASIC ELECTRIC ELEMENTS
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
HANDLING RECORD CARRIERS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
SEMICONDUCTOR DEVICES
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Summary:PROBLEM TO BE SOLVED: To provide a bar code reader which precisely reads the ITF code of wide width. SOLUTION: Plural line sensors 10a, 10b and 10c are provided for CCD 12 and a CCD driving circuit 14 sets exposure time different for the respective line sensors. Picture signals for the respective line sensors are inputted to a waveform processing means from output terminals 21a, 21b and 21c through a first filter circuit 15a. The waveform processing means binarizes the respective picture signals, generates picture data for the respective line sensors and stores them in a storage means. A decoding means constituted by a microcomputer sequentially decodes data and a read result on decoded data is outputted. Since sensitivity is changed for the respective line sensors and it is set, one of the line sensors 10a, 10b and 10c outputs the picture signal of an appropriate level for a range with wide brightness and darkness.
Bibliography:Application Number: JP19950250220