Voltage-boosting circuit for an electroluminescent lamp driver
US5418434A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1994 |
| Grant date | May 23, 1995 |
| Priority date | — |
| Expiry date | Aug 18, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a drive circuit for driving an electroluminescent device having an electroluminescent lamp, a battery, and a frequency divider circuit for generating a plurality of signals, including a first signal, the improved voltage-boosting circuit comprising first and second inductors electrically connected to the battery; a digital logic gate electrically connected to the frequency divider circuit; a first transitive switch electrically connected to the frequency divider circuit for receiving the first signal, and electrically connected to the first inductor for providing the first signal to the first inductor; and, a second transitive switch electrically connected to receive an output signal from the digital logic gate and electrically connected to the second inductor for providing the output signal to the second inductor, wherein the first and second inductors are caused to alternately provide high voltage pulses for driving the electroluminescent lamp. The digital logic gate may comprise a NOR gate having two terminals, one of which is electrically connected to receive a dimming signal for disabling the second inductor thereby reducing the electroluminescent lamp brightness. The opera…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.