Abstract: A single polar driving method for a cholesteric liquid crystal display. The method comprises the steps of selecting the pixels by applying a first signal switching between a ground and a first level to the common line of the selected pixels, driving the selected pixels into a reflecting state by applying a second signal out of phase with the first signal and that switches between a second and third levels to the segment lines thereof, driving the selected pixels into a transparent state by applying a third signal in phase with the first signal and that switches between the second and third levels to the segment lines thereof, and deselecting the pixels by applying a fourth signal fixed at a fourth level to the common lines thereof.

Abstract: A color liquid crystal display element. The LCD element comprises a lower and upper substrate, a liquid crystal sealed between the lower and the upper substrate, a plurality of color pixels disposed on the lower substrate and separated from each other by gaps, each color pixel comprising a pixel electrode on the lower substrate and a color filter on the pixel electrode, and a photo-resist material.

Abstract: The present invention relates to an illumination device of an LCD projection system. The illumination device comprises a light source, a quarter-wave retardation and a wire grid polarizer. The light source is used for providing light. The quarter-wave retardation is disposed near the light source. The wire grid polarizer is disposed parallel to the quarter-wave retardation, and is associated with the quarter-wave retardation to polarize the light from the light source. P-polarized light can pass through the wire grid polarizer. S-polarized light cannot pass through the wire grid polarizer, and is reflected to the quarter-wave retardation to become circular polarized light. The circular polarized light is reflected by a parabolic surface of the light source and passes through the quarter-wave retardation again to convert into p-polarized light. The converted p-polarized light can pass through the wire grid polarizer.

Abstract: A semiconductor device comprises a substrate having contact pads each covered by under bump metallurgy and a plurality of bump electrodes respectively provided on the under bump metallurgy covering the contact pads. According to one embodiment of the present invention, the semiconductor device is characterized by having at least one contact pad (e.g., a test contact pad) which is not provided with any bump electrode but still has under bump metallurgy provided thereon. According to another embodiment of the present invention, the semiconductor device is characterized by having at least a conductive line formed of the same material as the under bump metallurgy for interconnecting at least two of the contact pads. The present invention further provides methods of manufacturing the semiconductor devices.

Abstract: The driving circuit of a liquid crystal cell structure consists essentially of first and second write-enable transistors, first and second storage capacitors, first and second display-enable transistors, and a reset/preset transistor. When one of the display-enable transistors is turned on such that the video data saved in the corresponding storage capacitor is loaded into the mirror electrode for display, the other corresponding write-enable transistor is turned on simultaneously to pre-load the next video data into the corresponding storage capacitor. When the first and second display-enable transistors both are turned off, the reset/preset transistor is turned on to set the liquid crystal in the reset/preset voltage, wherein the reset/preset voltage is based on the overdrive voltage of the arrangement of the liquid crystal before next sub-frame time so as to increase the response rate of the liquid crystal cell.

Abstract: A driving method for improving power efficiency of an operational transconductance amplifier. The operational transconductance amplifier comprises a first current route and a second current route symmetrical to the first current route. Both of the first current route and the second current route comprise a plurality of transistors. Each of the transistors of the first current route has a smaller width/length ratio than the corresponding transistors of the second current route. The driving method comprises turning on the transistors of the first current route for outputting a reference current so that the second current route outputs a mirror current, which is greater than the reference current, corresponding to the reference current.

Abstract: The present invention relates to a color filter with mosaic pixel array arrangement. The color filter comprises a plurality of pixel arrays. The pixel array has four sub-pixels. The color of the sub-pixel of the pixel array is identical to that of another sub-pixel of another pixel array adjacent to the pixel array. The sub-pixels with same color form a sub-pixel group so that the area of a single color of the sub-pixel group is increased. Therefore, the adhesion strength between the sub-pixel group and the substrate can be augmented to avoid peeling from the substrate. According to the invention, the yield rate of the product will be raised and the chromaticity will be improved.

Abstract: The present invention discloses a data transfer system and method for a matrix display. The system includes a multi-level timing controller connected to a multi-level input data driver via a multi-level signal bus. A digital input signal necessary for image display is converted into a multi-level signal display data output by an encoder in the multi-level timing controller, transferred to the multi-level input data driver through the multi-level signal bus, and converted into a data driving signal for a display panel by a decoder. According to the present invention, due to the multiple levels, the number of lines between the controller and the data driver can be considerably decreased and data transfer frequency is reduced.