Abstract
AbstractThe power for driving logic part takes the major portion of the power consumption of a TFT‐LCD and the power of driving data lines is major part of the logic power. Therefore a power‐efficient data driving method is most important for low‐power TFT‐LCDs. Conventional data line sharing (DLS) method which uses horizontal 2 dot inversion consumes an amount of power by polarity transition of data signal.In this paper, we have proposed a new driving method of double rate driving Z‐Inversion (DRD Z‐Inversion) which reduces the logic power consumption by the polarity transition of data signal, with the same image quality compared to conventional DLS method [1∼4]. As the results of DRD Z‐Inversion to the 15.6″HD TFT‐LCD notebook, approximately 53% (0.31W) of the analog part power consumption in the logic power by the polarity transition of data signal has been reduced. This value is the sum of 36% (0.21W) reduction by polarity transition of data signal and about 17% (0.10W) reduction by using the low driving voltage liquid crystal (LC)
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