EL driver circuit
US6421034B1 · kind B1 · utility
32Cited by
8References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1999 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Aug 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A serial resonant circuit, formed by EL panel (CEL) and coil (L1), is connected to a push-pull driver through a positive feedback path to form an oscillator circuit. The EL panel is driven by a sinusoidal driving signal to emit light. The voltage level of the EL panel driving signal is adjusted corresponding to the change in the capacitance of the EL panel so that the luminous brightness of the EL panel can be maintained on a constant level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.