Automotive LED driving apparatus
US10166912B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2017 |
| Grant date | Jan 1, 2019 |
| Priority date | — |
| Expiry date | Aug 10, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An LED driving apparatus group in which first and second LED groups are connected in series is provided. The apparatus includes a voltage input unit that receives an input voltage from a vehicle power device and a current controller that generates a current with a predetermined level by adjusting the received input voltage and provides the current to an input terminal of the first LED group. A first feedback path feeds back a voltage applied to a first node, which is connected to an output terminal of the first LED group, to an input terminal of the current controller. A first switching unit is disposed on the first feedback path and is switched on or off based on a control signal. A second switching unit is disposed between an output terminal of the second LED group and ground and is switched on or off based on the control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.