Invention and Development of Overdrive Technology to Solve the Image-Lag Issue for TFT LCDs and LCTVs

Our proposed Level Adaptive Overdrive Technology, that has improved gray-level response of LCDs, has been reviewed. We also introduced a recently developed advanced level-adaptive overdrive (ALAO) method applicable to full-digital HD-LCTVs, which not only reduced the gray level response time to less than one fourth, but also improved S/N for still pictures by 10 dB and reduced the circuit cost for LAO method to almost half that of a conventional LAO circuit. We applied the ALAO method to a full-HDLC projector with 1.84 M pixels and obtained high full-HD motion picture qualities. In addition, we introduced the most recently developed software-processed level-adaptive overdrive (SLAO) method without any additional hardware and cost-up.