Display apparatus employing a field emission device and brightness control device and method therefor
US7336042B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2006 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Aug 1, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display apparatus includes a field emission device including a first electrode serving as a display plate on which phosphor material is coated, and a second and a third electrode for emitting electrons to be ejected onto the first electrode, wherein the phosphor material emits light when the electrons are ejected thereonto; a voltage application unit for applying driving voltages to the second and the third electrode to control an emitted amount of the electrons in accordance with display data and allow a specific part of the phosphor material to emit light; and a brightness control unit for controlling an emission brightness of the phosphor material. The brightness control unit includes a first electrode current detection unit, a display data amount estimation unit, a comparing unit, a preset value generation unit, an average turn-on rate detection unit, an average turn-on rate analysis unit, and a selection unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.