High-efficiency illumination in data collection devices
US7717343B2 · kind B2 · utility
15Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2007 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | May 22, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10386
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A hand held data collection device, such as a bar code scanner, portable data terminal, transaction terminal, or bar code verifier, containing at least one light-emitting diode (LED) that has been modified to improve the efficiency of light energy transmission. The modification involves transition features at the interface between the LED die surface and the ambient environment. Devices using such modified LEDs may offer a number of advantages such as extended read range, decreased read time, and improved battery life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.