摘要:
A modular system comprising a first component comprising an LED driver, a second component comprising a light engine and a third component comprising an interface module is described, the interface module comprising: - an input terminal for connecting to an output terminal of the LED driver; - an output terminal for connecting to an input terminal of the light engine; - a switch assembly for controlling a current received via the input terminal of the LED driver and provided to the light engine via the output terminal; - a control unit having an input terminal for receiving a set point representing a desired illumination characteristic of the light engine, the control unit further having a processing unit for processing the set point and determining control signals for the switch assembly, wherein the control unit is configured to determine a current modulation scheme and a duty cycle modulation scheme for the LED driver and the light engine based on the set point.
摘要:
A modular system includes an LED driver, including a switched mode power converter configured to output a supply current and a first control unit configured to control a switch of the switched mode power converter, and a light engine, including an LED assembly configured to receive the supply current, the LED assembly including a plurality of LEDs and one or more switches arranged in series or in parallel with one or more LEDs of the plurality of LEDs, and a second control unit configured to control the one or more switches of the LED assembly. The first control unit is configured to control an amplitude of the supply current. The second control unit is configured to control a duty cycle of the LED current through the plurality of LEDs.
摘要:
The invention relates to a method for changing the identification code of a light source in a visible light communication system, which visible light communication system comprises the light source, a driver system to drive the light source, and a server that is not able to communicate directly with the driver system, and which method makes use of a first mobile device comprising an image sensor, a processing unit, a network adapter, and a transmitter, wherein the processing unit is configured to process an output of the image sensor, wherein the processing unit is configured to communicate with the server via the network adapter, and wherein the processing unit is configured to send signals to the driver system using the transmitter, said method comprising the following steps: a. receiving a signal from the server by the network adapter of the first mobile device, said signal comprising a command to change the identification code of the light source from a first ID code to a second ID code; and b. transmitting, by the transmitter of the first mobile device, a signal to the driver system, said signal comprising a command to change the identification code of the light source to a second ID code.