LED assembly, LED fixture, control method and software program
AssigneeEldolab Holding B.V.
InventorPetrus Johannes Maria Welten
Life of this patent
Estimating the term…
Abstract
A plurality of LEDs arranged in groups, each group comprising at least one LED, a control circuit for driving the LEDs, the control circuit comprising a sensing device for sensing an operative parameter of the LEDs. The control circuit is arranged to: a) operate at least one group of the LEDs: b) sense by the sensing device a value of the operative parameter of the at least one group; c) repeat a) and b) for at least a different one of the groups; d) assign to each of the groups of LEDs a value of the operative parameter from the sensed operative parameter values; and e) control the driving of the groups of LEDs from the assigned operative parameter values.
Claims11
A light-emitting diode (LED) assembly comprising:
- a plurality of LEDs arranged in groups, each group comprising at least one LED,
- a control circuit for driving the LEDs, the control circuit comprising a sensing device for sensing an operative parameter of the LEDs, said operative parameter comprising a forward voltage;
- the control circuit being arranged to:
- a) operate at least two of the groups of the LEDs simultaneously with each other;
- b) sense by the sensing device a total value of the operative parameter of the at least two groups;
- c) repeat a) and b)for at least a different combination of at least two of the groups;
- d) determine the operative parameter for each of the at least two groups from the sensed total values of the operative parameter;
- e) assign to each of the groups of LEDs a value of the operative parameter from the determined operative parameter values;
- f) estimate a temperature of each of the LED groups based on the assigned value of the operative parameter;
- and
- g) control the driving of the groups of LEDs from the assigned operative parameter values by using the estimated temperature.
A method for controlling a light-emitting diode (LED) assembly comprising a plurality of LEDs arranged in groups, each group comprising at least one LED, the method comprising:
- a) operating at least two of the groups of the LEDs simultaneously with each other:
- b) sensing by the sensing device a total value of the operative parameter of the at least two groups;
- c) repeating a), b) for at least a different combination of at least two of the groups;
- d) determine the operative parameter for each of the at least two groups from the sensed total values of the operative parameter;
- e)assigning to each of the groups of LEDs the total value of the operative parameter from the determined operative parameter values;
- f) estimate a temperature of each of the LED groups based on the assigned value of the operative parameter;
- and
- g) controlling the driving of the groups of LEDs from the assigned operative parameter values by using the estimated temperature.
Dependencies are inferred from the claim text.