A low power consumption Thin Film Transistor‐Liquid Crystal Display (TFT‐LCD) with dynamic memory cells embedded in each pixel using low‐temperature poly‐Si technology has been developed. By holding data in the memory, the operating rate of the data driver can be dramatically reduced to 4Hz. Eight gray scale with low power consumption can be achieved by the area‐ratio gray scale method.
This TFT‐LCD can be used for displaying fine still images with low power consumption.
Abstract—
A low‐power‐consumption thin‐film‐transistor liquid‐crystal display (TFT‐LCD) with dynamic memory cells embedded in each pixel using low‐temperature poly‐Si technology has been developed. By holding data in the memory, the operating rate of the data driver can be dramatically reduced to 4 Hz. Eight levels of gray scale with low power consumption can be achieved by using the area‐ratio gray‐scale method. This TFT‐LCD can be used for displaying fine still images, with low power consumption.
We have newly developed the mutual-capacitive touch screen using double layered metal mesh electrodes with separated floating electrodes in borders between X-and Y-directional electrodes. We have defined the effect of the floating electrode with an electric field simulation and improved the sensitivity and the response time of the touch screen by separating the floating electrode into several small patterns.
We have developed a new high performance projected capacitive touch screen which has double layered metal mesh electrodes. By using high conductive metal electrodes and optimizing the mesh design, high sensitive 15‐inch diagonal self capacitance touch screen and 8‐inch diagonal mutual capacitance touch screen, both of which are optically bonded to LCD modules, have been developed.
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