We developed a 0.61'' diagonal OLED microdisplay dedicated to electronic viewfinders for digital vision systems, e.g.
for security or other professional applications. The microdisplay has a very high resolution of 5.4 million subpixels and
combines excellent image quality with low power consumption and a 10bit per color digital input. Subpixel pitch is
4.7x4.7μm². Thanks to the versatile architecture of the underlying ASIC circuit, the device can be easily adapted to
different applications and image formats: In the standard full color version, the resulting resolution is 1300 by 1044
pixels (SXGA). In a monochrome version, the resolution is 2600 by 2088 independent pixels, enabling e.g. digital night
vision at full 2K by 2K resolution. In addition to this, we developed two- and three color versions of the display that
allow to merge high resolution monochrome images e.g.in 2K by 2K resolution with lower resolution images e.g., from
an infrared sensor for image fusion or for adding colored graphical overlays.
We report high brightness and low operating voltage efficient green organic light-emitting diodes (OLEDs) based on silicon complementary metal-oxide semiconductor (CMOS) backplane which can be used in applications such as microdisplays. The small molecule top-emitting OLEDs are based on a fluorescent green emitter accompanied by blocking, doped charge transport layers, and an anode fabricated with standard CMOS processes of a 200 mm integrated circuit (IC) fab. The devices are designed to maximize the efficiency under low operative bias so as to fit the limited voltage budget of the IC. This was done by making optical simulations of the device structure, optimizing the organic layer thicknesses and charge injection in the n and p transport layers. The devices reach a current efficacy of 21.6 cd/A at a luminance of 20,000 cd/m2. The devices exhibit a voltage swing as low as 2.95 V for a contrast ratio of 1000. The optimized devices have a high lifetime of 6000 and 8800 h at 5000 cd/m2. Furthermore, aging inside the emission layer is investigated.