Full color hybrid TFEL display screen
US4801844A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1987 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Nov 4, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/023
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A hybrid full color TFEL display device includes a pair of independently addressable matrix arrays on stacked substrates wherein the front substrate includes patterned phosphors arranged as alternating stripes, and the rear substrate includes a single phosphor layer. The rear phosphor layer may be either a red or blue emitter and the front phosphor stripes are either red-green or blue-green. The space between the stacked substrates may be filled with a dyed filler material to improve the chromaticity of the rear substrate phosphor. To achieve a full color spectrum the fill factors of the various phosphors are adjusted to be inversely proportional to respective luminance of each at the driving frequency of the panels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.