Headlamp device with swivel control for a vehicle
US7204620B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2004 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Apr 28, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q2300/128
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Front viewability during turning may be enhanced by a headlamp device for a vehicle arranged to perform swivel control. The headlamp device is arranged so that when a vehicle 2 is turning around a right curve with low beam, the vehicle velocity V and the estimated horizontal G value are used to calculate the curve turning radius R, which is then used together with the vehicle velocity R to calculate the driver viewing point angle θ to which the leftward deviation β of the highest light intensity position in the light distribution pattern PL for low beam is added to calculate the target swivel angle α on the basis of which the lighting fixture unit of the headlamp 10R is swung over the target swivel angle α so that light beam is emitted toward a region surrounding the driver viewing point EP on the road ahead of the vehicle in the forward direction. In this arrangement, the driver viewing point angle θ can be calculated using only from the vehicle velocity data as a parameter without using steering angle data, making it possible to simplify the operation for swivel control and to eliminate the need to use a steering angle sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.