| 主权项 |
1. A thermostat configured to be wall mounted, comprising:
a frustum-shaped shell body having a circular cross-section and a central axis generally perpendicular to a wall when the thermostat is wall-mounted, the frustum-shaped shell body including a sidewall that extends along a length the central axis between first and second ends of the frustum-shaped shell body, the first end of the frustum-shaped shell body being wall-facing when the thermostat is wall-mounted, the second end of the frustum-shaped shell body being user-facing when the thermostat is wall-mounted, the first end of the frustum-shaped shell body having a first diameter and the second end of the frustum-shaped shell body having a second, larger diameter; a circular rotatable ring mounted proximate the second end of the frustum-shaped shell body, the circular rotatable ring having an axis of rotation generally perpendicular to the wall when the thermostat is wall-mounted, the circular rotatable ring being user rotatable about the axis of rotation, wherein the circular rotatable ring slides about a frame of the thermostat that dampens rotational movement of the circular rotatable ring and the circular rotatable ring receives user input; a circular cover mounted proximate the second end of the frustum-shaped shell body, the circular cover having a central axis generally perpendicular to the wall when the thermostat is wall-mounted, the circular cover comprising a clear circular center portion surrounded by a colored outer portion, wherein the clear circular center portion permits light emitted from a dot-matrix color display element to pass through the circular cover; at least one temperature sensor for use in sensing an ambient air temperature; a passive infrared (PIR) sensor that senses infrared radiation to detect a proximal user presence, the PIR sensor being located between the second end of the frustum-shaped shell body and the circular cover, and the PIR sensor being user-facing when the thermostat is wall-mounted, wherein the PIR sensor is located within the thermostat on a plane that intersects the central axis, extends vertically, and is perpendicular to the wall when the thermostat is wall-mounted; a lens, aligned on the plane that intersects the central axis and extends vertically such that the lens is vertically aligned with a center of the circular cover and a center of the dot-matrix color display element, wherein the PIR sensor senses infrared radiation through the lens to detect the proximal user presence; a plurality of HVAC (heating, ventilation, and air conditioning) wire terminals configured to receive a respective plurality of HVAC wires; the dot-matrix color display element mounted at a location between the second end of the frustum-shaped shell body and the circular cover, the dot-matrix color display element and the circular cover do not rotate when the circular rotatable ring is rotated and the thermostat is wall-mounted; and a processing system provided in operative communication with the plurality of HVAC wire terminals, the circular rotatable ring, the dot-matrix color display element, the PIR sensor, and the at least one temperature sensor, the processing system configured to:
determine a user-selected temperature value based on user rotation of the circular rotatable ring;cause the dot-matrix color display element to display a numerical value representative of the sensed ambient air temperature;send a control signal to the HVAC system via at least one of the HVAC wire terminals based at least in part on a comparison of the user-selected temperature value and the sensed ambient air temperature;maintain the dot-matrix color display in a non-active state in an absence of the detection of the proximal user presence by the PIR sensor;activate the dot-matrix color display element in response to the detection of the proximal user presence;maintain the dot-matrix color display in the active state during a period in which the proximal user presence is detected; andreturn the dot-matrix color display to an inactive state when the proximal user presence is no longer detected. |
