Evaluation of motion performance on scanning-backlight LCDs

The scanning-backlight technique to improve the motion performance of LCDs is introduced. This technique, however, has some drawbacks such as double edges and color aberration, which may become visible in moving patterns. A method combining accurate measurements of temporal luminance transitions with the simulation of human-eye tracking and spatiotemporal integration is used to model the motion-induced profile of an edge moving on a scanning-backlight LCD-TV panel that exhibits the two drawbacks mentioned above. The model results are val idated with a perception experiment including different refresh rates, and a high correspondence is found between the simulated apparent edge and the one that is perceived during actual motion. Apart from the motion-induced edge blur, the perception of a moving line or square-wave grating can also be predicted by the same method starting from the temporal impulse and frame-sequential response curves, respectively. Motion-induced image degradation is evaluated for both a scanning- and continuous-backlight mode based on three different characteristics: edge blur, line spreading, and modulation depth of square-wave grating. The results indicate that the scanning-backlight mode results in better motion performance. © Copyright 2009 Society for Information Display.

[1]  Kees Teunissen,et al.  3.2: LCD Motion Artifact Determination Using Simulation Methods , 2006 .

[2]  Hellmut Frieser.  The Modulation Transfer Function in Photography , 1964 .

[3]  Jun Someya,et al.  Evaluation of liquid‐crystal‐display motion blur with moving‐picture response time and human perception , 2007 .

[4]  Yoshinori Tanaka,et al.  35.2: Super-TFT-LCD for Moving Picture Images with the Blink Backlight System , 2001 .

[5]  S Yang,et al.  Modulation Transfer Function Measurement Using Three- and Four-bar Targets. , 1995, Applied optics.

[6]  Roelof Hamberg,et al.  Sharpness, sharpness-related attributes, and their physical correlates , 1997, Electronic Imaging.

[7]  Taiichiro Kurita,et al.  35.1: Moving Picture Quality Improvement for Hold‐type AM‐LCDs , 2001 .

[8]  Michiel Adriaanszoon Klompenhouwer,et al.  54.1: Comparison of LCD Motion Blur Reduction Methods using Temporal Impulse Response and MPRT , 2006 .

[9]  A. A. S. Sluyterman,et al.  Architectural choices in the Aptura™ scanning backlight for large LCD TVs , 2006 .

[10]  Youichi Igarashi,et al.  Guiding principles for high‐quality moving picture in LCD TVs , 2006 .

[11]  Li Chen,et al.  Flicker visibility in scanning‐backlight displays , 2008 .

[12]  Brian H. Berkeley,et al.  Novel 120‐Hz TFT‐LCD motion‐blur‐reduction technology with integrated motion‐compensated frame‐interpolation timing controller , 2008 .

[13]  Joe Miseli.  Taking on motion‐artifacts evaluation in the VESA FPDM , 2006 .

[14]  Xiaohua Li,et al.  Dynamic modulation transfer function: a method to characterize the temporal performance of liquid-crystal displays. , 2008, Optics letters.

[15]  Toni Järvenpää.  7.2: Measuring Color Breakup of Stationary Images in Field‐Sequential‐Color Displays , 2004 .

[16]  Wen Song,et al.  Motion-blur characterization on liquid-crystal displays , 2008 .

[17]  Ingrid Heynderickx,et al.  Modeling motion-induced color artifacts from the temporal step response , 2007 .

[18]  Adrianus J. S. M. de Vaan.  Competing Display Technologies for the Best Image Performance , 2006, Color Imaging Conference.

[19]  Hao Pan,et al.  Dynamic gamma: Application to LCD motion‐blur reduction , 2006 .

[20]  Brian H. Berkeley,et al.  69.1: Invited Paper: Advancements for Highest‐Performance LCD‐TV , 2006 .

[21]  Ingrid Heynderickx,et al.  Method for predicting motion artifacts in matrix displays , 2006 .

[22]  Sang Soo Kim,et al.  66.1: Invited Paper: The World's Largest (82‐in.) TFT‐LCD , 2005 .

[23]  Brian H. Berkeley,et al.  Analysis of response‐time compensation for black‐frame insertion , 2007 .

[24]  Hajime Nakamura.  A Model of Image DiSplay in the Optimized Overdrive Method for Motion Picture Quality Improvements in Liquid Crystal Devices : Optics and Quantum Electronics , 2001 .

[25]  Michael E. Becker.  10.1: Distinguished Paper: Evaluation of Moving-Line Contrast Degradation without Motion , 2008 .