Controlling vehicle lighting loads
US5767590A · kind A · utility
0Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1997 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Jan 21, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q1/14
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In the circuitry of this invention, variable DC voltage input is supplied to a pre-drive section through an input resistor. The value chosen for the resistor sets the base current which determines the gain of the pre-drive circuitry. The available gain controls the base current into the output driver which, in turn, supplies an output voltage to a load. The shape of the output curve is controlled by the available gain of both the pre-drive and drive circuitry. A control controls the pre-drive through a second resistor. The control also controls the power supplied to a second load through a second drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.