3D Display Shutter Frequency Control for Flickering Reduction

The patent applies periodic action by operating the shutter at a frequency of 75 Hz or higher, which is at or above the critical fusion frequency. This periodic shuttering creates a smooth visual perception without flickering, as the human eye cannot distinguish individual shutter cycles at this frequency. The consistent periodic operation ensures that the alternating display of left and right eye images is perceived as a continuous 3D image without distracting flicker effects.

The patent changes the operational parameter of shutter frequency to be 75 Hz or higher, which is a specific parameter threshold that resolves the contradiction. By setting this parameter above the critical fusion frequency, the system eliminates flickering perception while maintaining energy-efficient operation. This parameter change transforms the shutter operation from a potentially flickering low-frequency operation to a smooth high-frequency operation that avoids eye fatigue.

The patent optimizes the shutter frequency parameter to be exactly 75 Hz or higher, which is the minimum threshold needed to eliminate flickering. This parameter setting achieves the benefit of smooth image display and eye comfort while minimizing energy consumption by not operating at unnecessarily high frequencies. The parameter is tuned to the critical fusion frequency threshold, providing the most energy-efficient solution that still delivers the desired visual quality.

The patent maintains continuous shutter operation at a steady frequency of 75 Hz or higher throughout the display process. This continuous operation at a consistent frequency ensures that the useful action of blocking and transmitting light to create the 3D effect continues without interruption or variation, preventing flickering while maintaining energy efficiency through steady-state operation rather than variable frequency modulation.