Modulated intensity flasher for vehicle brake light with lockout
US6720871B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2001 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Apr 11, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q1/444
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for brightening and dimming a brake light of automotive vehicle for enhanced display indication of braking includes a pulse width modulation unit to be electrically connected to a brake lamp for sequentially modulating the supply energy to the lamp to generate a brightening and dimming of the lamp. A time extent of the modulation is detected so that the modulation can be stopped after a preselected time period and the light will be continually on as in a conventional braking operation After the brake is released by the operator, a second preselected time period for locking out the sequential interrupting is timed down, for avoiding repetitive flashing during stop-and-go traffic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.