Protective device for auto illumination system
US4697220A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 18, 1986 |
| Grant date | Sep 29, 1987 |
| Priority date | — |
| Expiry date | Mar 18, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A protective device or an auto illumination system, including an illumination component, a protective diode, a pulse processor, an overcurrent limit circuit, a high-voltage oscillator circuit and a trigger control circuit. An overcurrent limit circuit is added to the auto illumination system for protecting illumination elements from being burned due to excess current, by providing a curbing signal therefrom, so that the illumination elements can be protected from being destroyed even when the engine speed runs at over 18000 rpm, or as a result of mistakenly connecting an input signal line to the rotary distributor, increasing the durability of the illumination system. A trigger control circuit is provided for receiving a triggering signal to generate a high negative voltage for the illumination elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.