A voltage-compensated driver for lighting PMOLEDs panels

This paper presents a voltage compensation driver for lighting a passive matrix organic LEDs (PMOLEDs) panel. A driver is designed and fabricated using FPGA and discrete components. The supply voltage range of the proposed driver is under 20 V. Therefore, it can be applied in most commercial PMOLEDs panels. The luminance is confirmed by driving a PMOLEDs panel with a size of 64×48 pixels. Experimental results indicate that good luminance uniformity is achieved using the proposed compensation driver. The lighting performance of PMOLEDs is quite similar to that driven by a constant current. The voltage compensation driving method is applicable to PMOLEDs panels with various structures or materials. Moreover, it can be applied to both monochrome and gray scale PMOLEDs panels.