Abstract: AMLCDs use microelectronic thin film transistors (TFTs) to produce bright, full-color images equal to CRT in clarity and resolution. Various techniques for packaging the required drive electronics include chip on board (COB), tape automated bonding (TAB), chip on glass (COG), and self-scanned drivers. COG technology eliminates numerous flex cable connections and the demultiplexing cards associated with COB driver packaging by mounting the driver integrated circuit die directly onto the glass surface. Increasing AMLCD sizes and resolutions require driver electronics to be placed as close to the TFT picture elements as possible to minimize power requirements and increase speed. Self-scanned poly-Si AMLCDs have driver integrated circuitry made of TFTs, integrated on the display plate or TFT glass substrate. SCI Systems is developing monochrome and color active matrix liquid crystal display (AMLCD) MDUs that use David Sarnoff Research Center (Sarnoff) poly-Si AMLCD technology. These designs will incorporate `self-scanned' p-Si AMLCDs with integrated row and column and 5-bit gray shade drivers. This technology eliminates the requirement for interfacing thousands of drive lines to the displays and eliminates the cost of separate diver chips. Reducing the number of leads, which is the number one cause of AMLCD, TFEL, and plasma display failures, with self-scanned displays will provide lower cost and more compact displays. Advantages of self-scanned displays also include on plate D/A gray scale conversion, improved reliability, redundancy for open row and column lines, and higher pixel densities. The engineering prototype AMLCD MDUs include the AMLCD panel, filters, backlighting, holographic diffusers, interface electronics, display controller, and power supplies. !17
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