Central Zone Size Dependence of Peripheral Dimming Technique Under Wide Field of View Environment

Peripheral dimming technique based on gaze tracking was proposed to reduce the power consumption of emissive displays adopted in headset. This technique divides an image into two zones: a central zone which is a circular area centered on the gaze point, and a peripheral zone which is the outer area of the central zone. This technique achieves power savings by gradually reducing the brightness in the peripheral zone while maintaining the brightness of the central zone. This paper investigates effects of central zone size (CZS) on the technique under a wide field of view (FoV) environment. Psychophysical experiments are conducted to determine the threshold dimming conditions for the CZSs of 10°, 25°, and 40°. The results showed that the individual variations and the mean value of threshold dimming condition increased in proportion to CZS. Interestingly, in contrast, the power-saving efficiency depending on the CZS was not significantly different. The technique can reduce power consumption of display panel by approximately 12% on average, up to 15%. It is demonstrated that the technique is feasible even in a wide FoV environment, and the CZS can be flexibly determined depending on the application or image content.