US Patent 11366321 Predictive dimming of optical passthrough displays

In one implementation, a method of controlling a dimming level of dimmable optical element based on a predicted ambient light level is performed at a device including one or more processors, non-transitory memory, and a dimmable optical element. The method includes predicting a change, in a first direction, in an ambient light level at a future time. The method includes changing, at a first time in advance of the future time and in the first direction, a transmission coefficient of the dimmable optical element based on the predicted change in the ambient light level. The method includes changing, at a second time after the first time and in a second direction opposite the first direction, the transmission coefficient of the dimmable optical element based on the ambient light level at the second time.