PULSE WIDTH MODULATION (PWM) DRIVING SCHEME AND BEZEL REDUCTION

摘要

This application sets forth a circuit configuration for a light emitting diode (LED) or organic light emitting diode (OLED) display. The circuit configuration allows for the pulse-width modulation (PWM) of each emission signal sent to each line of the display. The PWM of each emission signal is accomplished using a gate-in-panel (GIP) controller of the display. The GIP controller uses an arrangement of shift register outputs and a programmable clock input to control an output of an inverter that provides the emission signal. The programmable clock input can be programmed according to a desired timing or duty cycle for the emission signal. In this way, by limiting the duty cycle of the emission signal, dimming and other display features can be exhibited by the LED or OLED display.

主权项

1. A computer-implemented method for using a programmable clock input to a gate-in-panel (GIP) controller to perform pulse-width modulation (PWM) of an output signal provided to a line of a display by an inverter of the GIP controller, the method comprising:
by the inverter of the GIP controller: receiving a scanning signal from at least one shift register of the GIP controller; receiving a programmed output from the at least one shift register, wherein the programmed output is based on the programmable clock input to the GIP controller; and causing a pulse-width of the output signal to be adjusted according to a high or low state of each of the scanning signal and the programmed output.