Low-Power Response Time Accelerator with Full Resolution for LCD Panel
In recent years, power consumption has become one of the most critical design concerns in designing VLSI systems. The reduction of power consumption in displayers is inevitably required by the emergence of mobiles, fast systems, and et cetera. There are many reported problems associated with the response time of an LCD display, typically termed as afterimage specially when a motion picture video is being played on an LCD panel. To reduce afterimage artifacts, a new ‘overdrive’ method, named as Response Time Acceleration (RTA) is proposed in this paper. The proposed ‘overdrive’ method effectively controls truncation and quantization errors present in the conventional ones only with a few incremental gates. Furthermore the proposed ‘overdrive’ method provides two solutions with a shorten table memory while keeping full resolution and reducing power consumption. Test results show that the power consumption is reduced with the proposed method by 41% compared with conventional methods.
KeywordsQuantization Error Current Frame Frame Data Bilinear Interpolation Full Resolution
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- 2.Lee, B.-W.: Reducing Gray-Level Response to One Frame:Dynamic Capacitance Compensation. In: SID 2001 Digest, 51.2 (2001)Google Scholar
- 4.Nakamura, H.: A Model of Image Display in the Optimized Overdrive Method for Motion Picture Quality Improvements in Liquid Crystal Devices. Journal of Applied Physics 40(11), 6435–6440 (2001)Google Scholar
- 5.Nakanishi, K.: Fast Response 15-in. XGA TFT-LCD with Feedforward Driving Technology for Multimedia Application. SID 2001 Digest, 29.3 (2001)Google Scholar
- 6.Kawabe, K.: New TFT-LCD Method for Improved Moving Picture Quality. SID 2001 Digest, 35.4 (2001)Google Scholar
- 7.Lee, B.-W.: Late-News Paper: LCDs: How Fast is Enough? SID 2001 Digest, 41.5 (2001)Google Scholar
- 8.Ohta, M., Oh-E, M., Matsuyama, S., Konishi, N., Kagawa, H., Kondo, K.: Some LCD modes, for example, the In-Plane Switching modes, are known to have less varying response time between grays. SID 1999 Digest, 86 (1999)Google Scholar
- 9.Nakamura, H.: Overdrive Method for Reducing Response Times of Liquid Crystal Display. SID 2001 Digest, 51.1 (2001)Google Scholar
- 13.Otsu, N.: A Threshold Selection Method from Grey-Level Histograms. IEEE Trans. Syst. Man, Cybern SMC-8, 62–66 (1978)Google Scholar