We have developed new current demultiplexer TFT circuits for AMOLED and applied the circuits to 2.2-in. QVGA AMOLED. The combination of the current demultiplexer and our voltage boosted current programmed pixel can achieve good uniformity of display image and a compact module.

We introduce a high-level synthesis framework to automatically synthesize asynchronous circuits, especially speed-independent circuits, from a concurrent programming language called ALPEH. ALPEH is a high-level concurrent algorithmic specification that can model complex concurrent control flows, logical and arithmetic computations, and communications in easy way. This specification language has been developed to be translated into a Petri net. The major contribution of this paper is the generation of globally optimized control circuits during preserving neat formalism in the specification.

The mechanisms for executing concurrent applications proposed so far fall into one of three groups: processes, kernel-level threads, and user-level threads. Each of them is insufficient in terms of either parallelism, the flexibility to combine separately developed programs at run-time, or costs of operations such as creation, switching, and termination. A thread facility in the XERO operating system overcomes this problem and provides a uniform framework for executing concurrent applications. To achieve parallelism of threads, the flexibility to combine separately developed programs at run-time, and fast thread operations, the operating system kernel and a thread management module in a user address space manage threads cooperatively. We implemented the cooperative thread management mechanism and measured its performance to examine the effectiveness of our approach.