Response time

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New driving strategies like overdriving leads to complex temporal behavior for the display emission and...

Extension of the digital TV market put in the last decade a lot of pressure on the temporal behavior of flat panel displays.

Indeed, HD TV requires almost 60 Hz working frequency and Liquid Crystal Displays are not intrinsically very rapid devices.

Numerous efforts have been made recently to improve the time response performances of LCDs. Nevertheless, the response time measurement itself is not straight forward especially when inter-gray levels with low differences are explored.


When addressing motion artifacts on flat panel displays, the first thing typically considered is motion blur. Full understanding of the human visual system with regard to motion performance evaluation is complex.

The new VESA FPDM section addressing this problem introduces moving edge-blur that can be measured by various instruments like pursuit cameras.
This evaluation is generally tedious and expensive due to the cost of the instruments and their complexity. It results in moving picture response time behaviors versus gray levels generally measured in very strict moving configurations.

Even if this type of measurement is necessary, a more simple way is to use fixed detectors and simulate moving edge blur assuming known the driving properties for the display.