CONTROL DEVICE FOR LIGHT EMITTING ELEMENT, CONTROL METHOD FOR LIGHT EMITTING ELEMENT, LIGHTING APPARATUS
FIG1 is a diagram showing a configuration of a driving device of a light emitting element according to one embodiment
FIG1 is a diagram showing a configuration of a driving device of a light emitting element according to one embodiment. The driving device (control device) of the light emitting element shown in the figure controls the lighting state of the light emitting element by receiving power from the power source 1, and is configured to includes a DC-DC converter 2, a control unit 3, a light emitting element 4, and a current detection resistance element 5. Here, resistance 6 in the circuit represents a parasitic resistance, and capacitor 7 represents a parasitic capacitance.
diagram
12
memory
11
signal generation unit
2
DC-DC converter
3
control unit
13
unit
['1. A control device for controlling a light emitting element by performing pulse width modulation comprising: a DC-DC converter (2) for supplying voltage to the light emitting element, a setting unit (11) that sets a control value for the pulse width modulation, a detection unit (13) that detects an actual value of an ON time period which is a period during which the current flowing through the light emitting element is relatively high, and a correction unit (14) for correcting the control value set by the setting unit so as to reduce the difference between a specified value of the ON time period corresponding to the control value and the actual value of the ON time period detected by the detection unit,  characterised in that the pulse width modulation is in the DC-DC converter.', '2. The control device for controlling the light emitting element according to claim 1, further comprising a memory (12) which stores data indicating the correspondence between the control value and the specified value of the ON time period, wherein the correction unit corrects the control value by obtaining the specified value of the ON time period from the memory.']