Patent ID: 8727611

Claim:
A thermostat, comprising: a housing including a forward-facing surface; a passive infrared (PIR) motion sensor disposed inside the housing and used to sense occupancy in the vicinity of the thermostat, the PIR motion sensor having a radiation receiving surface and being able to detect the lateral movement of an occupant in front of said forward-facing surface of said housing; one or more temperature sensors disposed inside the housing; and a grille member having one or more elongated features over the radiation receiving surface of the PIR motion sensor, wherein: at least one temperature sensor is thermally coupled to the grille member, the grille member occupies a void in the forward-facing surface, and the grille member substantially conceals and protects both the PIR motion sensor and at least one temperature sensor disposed inside the housing, whereby the concealment of the PIR motion sensor by the grille member promotes a visually pleasing quality of the thermostat yet permits the PIR motion sensor to effectively detect the lateral movement of the occupant.