JPS54111233A - Optical code reader - Google Patents

Optical code reader

Info

Publication number
JPS54111233A
JPS54111233A JP2003978A JP2003978A JPS54111233A JP S54111233 A JPS54111233 A JP S54111233A JP 2003978 A JP2003978 A JP 2003978A JP 2003978 A JP2003978 A JP 2003978A JP S54111233 A JPS54111233 A JP S54111233A
Authority
JP
Japan
Prior art keywords
light
output
recording medium
light source
pulse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2003978A
Other languages
Japanese (ja)
Other versions
JPS5913072B2 (en
Inventor
Masuo Sugihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP53020039A priority Critical patent/JPS5913072B2/en
Publication of JPS54111233A publication Critical patent/JPS54111233A/en
Publication of JPS5913072B2 publication Critical patent/JPS5913072B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To reduce considerably the consumption power of a light source to make it possible to operate a reader by a small-capacity battery, by pulse-driving the light source during the time when bar code is not read and switching automatically the light source to DC driving in a bar code read time.
CONSTITUTION: Pulse signals at a fixed interval which are generated from pulse oscillator OSC are outputted as read control signal LON through OR gate OR and turn on trnsistor (Tr) T1 and cause the LED of light pen LP to emit light. When light pen PT starts to contact with a recording medium, the reflection light of the A part of the recording medium is received by light receiving element PT, and output signal Sig becomes H-level and is supplied to voltage compatator COP and demodulator circuit M. compatator COP compares the H-level input with reference voltage Vr and sends the output to edge detector circuit ED, and the output triggers one-shoot multivibrator V. Then, the output is taken out as signal LON and holds Tr T1 in an ON state from this time. When light pen LP is separated from the recording medium, Tr T1 is driven by pulse signals again.
COPYRIGHT: (C)1979,JPO&Japio
JP53020039A 1978-02-20 1978-02-20 optical code reader Expired JPS5913072B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53020039A JPS5913072B2 (en) 1978-02-20 1978-02-20 optical code reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53020039A JPS5913072B2 (en) 1978-02-20 1978-02-20 optical code reader

Publications (2)

Publication Number Publication Date
JPS54111233A true JPS54111233A (en) 1979-08-31
JPS5913072B2 JPS5913072B2 (en) 1984-03-27

Family

ID=12015909

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53020039A Expired JPS5913072B2 (en) 1978-02-20 1978-02-20 optical code reader

Country Status (1)

Country Link
JP (1) JPS5913072B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5814278A (en) * 1981-07-17 1983-01-27 Nec Corp Bar code reader
JPS5972575A (en) * 1982-10-20 1984-04-24 Casio Comput Co Ltd Optical reader

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5814278A (en) * 1981-07-17 1983-01-27 Nec Corp Bar code reader
JPS5972575A (en) * 1982-10-20 1984-04-24 Casio Comput Co Ltd Optical reader

Also Published As

Publication number Publication date
JPS5913072B2 (en) 1984-03-27

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