Active-matrix organic LED (AMOLED) is one of the most promising contenders for next-generation displays. However, the VT-shift issue in thin-film transistors (TFT) has to be addressed to enable wide deployment [1]. Voltage programming and current programming are well-known VT-shift-compensation techniques for analog driving. However, they all need more than 4 TFTs per pixel, which increases the...

Organic Light Emitting Displays (OLED) is a new type of display device which has become increasingly attractive and popular. Due to the complex manufacturing process, various defects may exist on the OLED panel affecting the quality and life of the display panels. These defects have the characteristics of fuzzy boundaries, irregular in shape, low contrast with background and especially, they ar...

Active OLED are good challenger for becoming the new commonality technology for large displays. Current-controlled pixels that are used in several prototypes are very complex and do not correct all the problems of the use of OLED pixels. This paper presents a different approach to solve these problems. It suggests keeping the pixel circuitry as simple as possible and to put a correction mechani...

In this paper, we present a new model for an organic pixel addressing circuit based on four-transistor configuration. The proposed circuit doesn’t have the problems of regular configurations which are based on four-thin film transistors (TFT). Circuits based on four-TFT have many advantages, but the only problem is the existence of current peaks at the beginning of each pixel luminescence. Both...

Abstract— Organic semiconductors with conjugated electron system are currently intensively investigated for optoelectronic applications. This interest is spurred by novel devices such as organic light-emitting diodes (OLED), organic solar cells, and flexible electronics. In this talk, I will discuss some of the recent progress in realizing devices, in particular highly efficient white OLED for ...

Organic light emitting diodes (OLED) are promising candidates for general illumination, since they offer the possibility to realize large area light sources which can even be transparent and flexible. The energy-saving potential of OLEDs is similar to that of LEDs, but the two technologies differ in a number of ways. The present report introduces the basics of the OLED technologies and its late...

In this paper, a colorand brightness-tunable organic light-emitting diode (OLED) is reported. This OLED was realized by inserting a charge generation layer into an electron only device to form an n-i-p-i-n structure. It is shown that, by changing the polarity of applied voltage, only the p-i-n junction operated under positive bias can emit light and, by applying an AC voltage, emission from bot...

Hydrogenated amorphous silicon thin-film transistor (a-Si:H TFT) pixel electrode circuit with a function of current scaling is proposed for active-matrix organic light-emitting displays (AM-OLEDs). In contrast to the conventional current mirror pixel electrode circuit, in this circuit a high data-to-organic light-emitting device (OLED) current ratio can be achieved, without increasing the a-Si:...

A thin and lensless two-dimensional (2D) to three-dimensional (3D) convertible display based on integral imaging using an organic light emitting diode (OLED) panel as a direct emissive light source is proposed with improved optical efficiency. A point light source array for 2D-3D convertible display is formed on the surface light source, i.e., the OLED panel. However, a blurring effect and colo...