The Realization Of An Svga Oled-On-Silicon Microdisplay Driving Circuit

An 800 x 600 pixel organic light-emitting diode-on-silicon (OLEDoS) driving circuit is proposed. The pixel cell circuit utilizes a subthreshold-voltage-scaling structure which can modulate the pixel current between 170 pA and 11.4 nA. In order to keep the voltage of the column bus at a relatively high level, the sample-and-hold circuits adopt a ping-pong operation. The driving circuit is fabricated in a commercially available 0.35 mu m twopoly four-metal 3.3 V mixed-signal CMOS process. The pixel cell area is 15 x 15 mu m(2) and the total chip occupies 15.5 x 12.3 mm(2). Experimental results show that the chip can work properly at a frame frequency of 60 Hz and has a 64 grayscale (monochrome) display. The total power consumption of the chip is about 85 mW with a 3.3V supply voltage.