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FLC wobbling for high‐resolution projectors

Abstract— There is a tradeoff between brightness and resolution in high‐resolution displays. A new wobbling technique apparently doubles the number of pixels in AMLCDs without reducing the brightness. A wobbling device is composed of a ferroelectric‐liquid‐crystal (FLC) device and a quartz‐crystal plate. The FLC device rotates the polarized plane of light irradiated from TFT‐LCDs. The FLC wobbling device is combined with a projector which uses three TFT‐LCD panels with 480 horizontal lines to apparently double the vertical resolution to 800–1000 lines. A depixelization effect, which eliminates the pixel images on the screen resulting in a smooth CRT‐like picture, was observed. The device survived mechanical shocks at the 100‐m/s2 level and continuous driving at 75°C for more than 1000 hours, thus confirming its high reliability. We have also developed a new FLC mixture for the device with a smectic‐C* temperature range from −33 to 86°C.