Light control apparatus for a vehicle
US4728861A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 27, 1985 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Nov 27, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q1/1415
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A light control apparatus for a vehicle is integrated with headlamp driving relays, a light sensor, a lighting switch which selects a manual mode or an automatic mode, and a control unit which controls the relays in accordance with the light sensor output when the lighting switch selects the automatic mode and turns on or off the headlamps. Two power source systems and two headlamp driving systems are provided. The signal level of a given terminal of the control unit is detected and is input to the microcomputer of the control unit. The microcomputer judges whether or not trouble has occurred by detecting a level difference. An alarm indication is given by a lamp or a buzzer if trouble is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.