Low power bar code reader
US5621204A · kind A · utility
9Cited by
10References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 30, 1995 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | May 30, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2007/10495
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A bar code reader has a light emitting source for illuminating a bar code, a photosensing element for sensing the light reflected from the bar code and an amplifier having an input to which the photosensing element is coupled. A single series path is employed to generate a current which is used to operate the light emitting element and to produce a bias voltage to bias the amplifier at a predetermined level. Using the same current to drive the light emitting element and to develop the bias voltage reduces the power consumed to operate the bar code reader.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.