| 摘要 |
<p>The present invention relates to an apparatus for driving a light emitting element using an MCU, More specifically, the present invention relates to an apparatus to control a change in output of a light emitting element using the MCU in real time, and adjusting a driving voltage at the same time. According to the embodiment of the present invention, an apparatus for driving a light emitting element using an MCU may include: a DCDC converter which changes power voltage supplied from a power supply part into a DC voltage, and supplies it to a light emitting element device; a constant current control part which sinks current flowing along a light emitting element array to be a constant current; an MCU which detects a current value flowing from the constant current control part to the light emitting element array, changing it into a first digital signal; generating a first PWM signal which corresponds to a difference between a first PWM signal and a set object current value; controls the constant current control part; detects the cathode voltage of the light emitting element array from the constant current control part; changes a voltage difference between DC voltage and the cathode voltage of the light emitting element array into a second digital signal; and generates a second PWM signal which corresponds to a set voltage difference; a PWM signal conversion part which changes the second PWM signal generated by the MCU to generate feedback voltage; and a voltage divider which divides the feedback voltage and transmit it to a converter.</p> |
