Backlight using transverse dynamic RF electric field and transparent conductors to provide an extended luminance range
US5925988A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1998 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Mar 31, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/307
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed are a backlight and a method of driving the same to provide a uniform low intensity source of light for a liquid crystal display. The fluorescent lamp includes a fluorescent lamp and a drive circuit coupled to the anode and to the cathode of the fluorescent lamp for supplying the fluorescent lamp with a drive current. First and second longitudinally extending substantially transparent conductor members are disposed externally along the length of the lamp. A radio frequency (RF) signal generator connected to each of the first and second longitudinally extending conductor members drives the first and second conductor members with an RF signal to generate a dynamic RF electric field within the glass tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.