Vehicle lamp control apparatus and vehicle lamp system
US8983734B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2012 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Mar 21, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q2300/324
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Techniques are disclosed for enhancing the accuracy of auto-leveling control to adjust the optical axis of a vehicle lamp using an acceleration sensor. A controller stores reference values of first and second angles, updates the reference value of the second angle by treating a change of a sum angle during a vehicle stop as a change of the second angle, and updates the reference value of the first angle by treating a change of the sum angle when the vehicle is stopped as a change of the first angle. The controller derives a difference between a value of the sum angle and a sum of the reference values of the first and second angles, and corrects at least one of the reference values so as to reduce the difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.