Abstract: A multi-layer touchscreen assembly for an appliance includes a panel including an outer touchscreen surface, an opaque layer positioned below the touchscreen surface and having at least one transparent area therein defining lighting of at least one visual touch control region, a printed circuit board positioned below the opaque layer, the printed circuit board including a plurality of light-emitting diodes proximate one or more corresponding capacitive touch sensors of a first visual touch control region of the one or more visual touch control regions, and the one or more capacitive touch sensors configured to provide a visual indication of a control aspect of the appliance according to a user's touch input. The assembly also includes at least one diffusion portion operatively positioned between the opaque layer at a transparent area thereof and the printed circuit board at the first visual touch control region.

Abstract: An electrical appliance includes a controller operatively connected to a power circuit, a control circuit, a power source, a sensor for sensing a parameter level, and an active element. The controller is configured to receive an input of the parameter level from the sensor and to output a duty cycle for controlling a power level of the active element via the control circuit at various times to achieve a target set point of the parameter, the duty cycle based on proportional and integral control. The controller uses the proportional control and the integral control when the control circuit is energized, and accumulates integral error only when a parameter process variable sensed by the sensor is determined to be within an interval of the target set point.