Systems and methods for controlled illumination of light-emitting diodes
US11350499B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2021 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | Mar 5, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/395
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Systems and methods are disclosed for controlled illumination of LEDs. An example system comprises: a plurality of LEDs; an LED controller; a current buffer adapted to receive an input bias level signal from the LED controller, wherein a set of LEDs to be controlled together are connected in parallel with each other in a circuit with the current buffer; and at least one current limiting resistor connected in the circuit with the plurality of LEDs and the current buffer. The systems and methods are adapted to control the illumination of the LEDs by applying a constant voltage to the circuit based upon the input bias level signal, thereby controlling the illumination of the light-emitting diodes without the use of pulse width modulation. Crosstalk interference with RFID components due to pulse width modulation is thereby avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.