Patent ID: 11935480
Assignee: KOPIN CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 10:
11. A method for dimming an organic light emitting diode (OLED) display comprising:
receiving a dimming level setpoint;
selecting a subrange of pixel illumination levels from a range of pixel illumination levels based on the dimming level setpoint;
adjusting a VCOM voltage for the OLED display based on the dimming level setpoint;
establishing a selected duty cycle based on the dimming level setpoint signal;
utilizing rolling shutter to dim the OLED display when the selected duty cycle is in a range from a first low limit to a duty cycle of 100 percent; and
utilizing global shutter to dim the OLED display when the selected duty cycle is in a range from a second low limit to a minimum duty cycle for the OLED display, wherein the first low limit is used to switch from rolling shutter to global shutter when the selected duty cycle is decreasing, the second low limit is used to switch from global shutter to rolling shutter when the selected duty cycle is increasing, the first low limit is less than the second low limit and both the first low limit and the second low limit are less than a blanking time for the OLED display; and
illuminating one or more segments from each segmented pixel of the OLED display, each segmented pixel comprising:
at least a first emissive area;
at least a second emissive area; and
a non-emissive area, the non-emissive area is disposed between the at least the first emissive area and the at least the second emissive area, in operation the OLED display is dimmed based on the dimming level setpoint.