Gabriel-Eugen Onac

Scanning backlight for motion-blur reduction on mobile displays

— Small-form-factor liquid-crystal displays (LCDs) are mainly used in mobile applications (e.g., mobile phones, PDAs, and portable game consoles) but also in digital still cameras, video cameras, automotive applications, etc. Like all active-matrix LCDs, mobile displays suffer from motion blur caused by the sample-and-hold effect. One option for improving the motion portrayal on active-matrix LCDs is the use of a scanning backlight, which results in an imaging behavior similar to the one present in impulsive displays. In this paper, the realization of a scanning backlight for mobile displays is reported. This employs a backlight with seven individually lit segments for reducing the motion blur. Results of perception experiments performed with two identical displays confirm the benefit of using this technology. Optimal driving conditions result in a major improvement in motion portrayal on mobile LCDs.

11.2: Scanning Backlight for Mobile Displays

The first realization of a scanning backlight for mobile displays is reported. This employs seven individually lit segments to reduce motion blur caused by the sample and hold effect. Optimal driving conditions result in a major improvement of motion portrayal on mobile liquid crystal displays.