A method and system for compensating stressed pixels on a light-emitting diode based display device is disclosed. The emission driver includes a plurality of flip-flops, and each flip-flop selectively receives two input signals and inverts a level of a received input signal. And an estimated gain is acquired from the table according to the position of the head, and an estimated gain of the observer is changed so as to change the disturbance suppression frequency characteristic. The sleeve is sized to receive the inflator.