Fluorescent lamp system including light blocking members to create uniform illumination along a florescent lamp
US5898275A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1997 |
| Grant date | Apr 27, 1999 |
| Priority date | — |
| Expiry date | Apr 15, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0435
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fluorescent light source includes a fluorescent lamp, lamp bases attached to opposite ends of the fluorescent lamp, and an electrically insulating substrate connected to the fluorescent lamp. A heating element is positioned on the fluorescent lamp, and a first and second pair of power traces are formed on the electrically insulating substrate. The first pair of power traces are connected to the heating element to provide power thereto. The second pair of power traces are connected to a pair of electrical conductors that provide power to the fluorescent lamp. This fluorescent lamp can be used in a replaceable fluorescent light source unit for a document scanner. The replaceable fluorescent light source unit includes a housing, lamp base receiving members attached to the housing, and registration notches to properly align the fluorescent lamp. Lastly, the fluorescent lamp source includes light blocking material to provide a uniform illumination profile along the length of the lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.