Organic light emitting diode (OLED) is light emissive device. The advantages of OLED are low power consumption, self electroluminescence and simple optical system. Furthermore, active matrix pixels and display drivers can be integrated together by standard CMOS technology for driving OLED. As a result, a novel microdisplay can be implemented by integrating OLED on a silicon backplane. Liquid-crystal-on-silicon (LCoS ) microdisplay is well developed for head mount display (HMD) applications, there are limitations of high power consumption of backlight and complicated optical system. OLED microdisplay solves these problems by self electroluminescence and high efficiency. Moreover, the size can be as compact as LCoS and good for HMD application....[ Read more ]

Organic light emitting diode (OLED) is light emissive device. The advantages of OLED are low power consumption, self electroluminescence and simple optical system. Furthermore, active matrix pixels and display drivers can be integrated together by standard CMOS technology for driving OLED. As a result, a novel microdisplay can be implemented by integrating OLED on a silicon backplane. Liquid-crystal-on-silicon (LCoS ) microdisplay is well developed for head mount display (HMD) applications, there are limitations of high power consumption of backlight and complicated optical system. OLED microdisplay solves these problems by self electroluminescence and high efficiency. Moreover, the size can be as compact as LCoS and good for HMD application.

The silicon backplane for OLED is developed. There are two topics on design. One is the pixel driving circuit, which has to ensure the current continuously flow through OLED. The major problem is process variation that affects the uniformity of luminance. The process independent pixel driving schemes are proposed. The other is that, the display drivers have to be integrated in the silicon backplane in order to simplify the I/O interface. The display drivers consist of column driver, row driver and digital-to-analog converter. All these circuits are efficiently integrated with the pixels. Finally, a OLED controller board is developed to convert conventional video for the silicon backplane. The controller board can support many video formats; including TV, PC graphic and DVI. Moreover, there are many other functions in the board to optimize the silicon backplane performance.