| 摘要 |
<p>According to an embodiment of the present invention, an LED color forming system using a general purpose input output (GPIO) interface can form various colors by a current supplier using a simple analog circuit even without a pulse width modulation (PWM) controller and a digital-to-analog converter (DAC). The LED color forming system using a GPIO interface comprises a current supply unit which supplies a current to N number of LEDs; and a controller which generates a control signal for controlling an operation of the current supply unit, wherein a GPIO interface is used as an interface between the controller and the current supply unit. In detail, the current supply unit comprises M number of current suppliers disposed to each of the N number of LEDs, and the controller generates a control signal for controlling an operation of each of the NxM current suppliers.</p> |
