US 9,313,852 B2 · LED driver with external temperature-compensated illumination control signal modulator

Abstract

The present invention concerns LED drivers and is in particular directed to signal overlay for feature addition to an existing LED driver. Specifically, the invention is directed to an apparatus (200) for operating a LED driver (100), to a method of operating a LED driver, to a computer program for operating a LED driver and to a LED driver unit. The apparatus (200) is capable of overlaying an overlay signal (digital or analogue) to a control signal (164) of the LED driver (100) in dependence of external control information (256). The control signal (164) is provided to the LED driver at a control signal inlet (105). By overlaying the overlay signal, the apparatus (200) modulates the control signal (164) and provides a modulated control signal (164) to the same control signal inlet (105).

Claims14

Dependent claims

An apparatus for operating a LED driver, the apparatus being configured to be coupled to the LED driver and comprising:

an input configured to capture a value of a control signal, wherein the control signal is to be provided at a control signal inlet of the LED driver, such that the LED driver can control operation of a LED based on the provided control signal, and
a modulator configured to modulate the control signal according to a predefined protocol and to provide the modulated control signal at the same control signal inlet, wherein a programmable internal control circuit of the LED driver is adapted to the predefined protocol, such that the LED driver is capable of controlling the LED in dependence of the modulated control signal generated by the apparatus.

Dependencies are inferred from the claim text.

LED driver with external temperature-compensated illumination control signal modulator

Life of this patent

LED driver with external temperature-compensated illumination control signal modulator

Life of this patent

Abstract

Claims14