JPS54111233A - Optical code reader - Google Patents
Optical code readerInfo
- 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
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
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)
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 |
-
1978
- 1978-02-20 JP JP53020039A patent/JPS5913072B2/en not_active Expired
Cited By (2)
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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