Patent ID: 9169690
Filing Date: 2015-10-27
Classification: E06B

Abstract:
1. A window treatment system configured to selectively cover a window that separates an exterior space from an interior space, the window treatment system comprising: a headrail that is elongate along a first direction and is configured to be coupled to a structure adjacent the window within the interior space; a covering material having a top end and a bottom end that is spaced from the top end along a second direction that is perpendicular to the first direction, the top end of the covering material being operatively attached to the headrail such that the covering material is movable along the second direction between a raised position and a lowered position, the covering material further having a first side and a second side that is opposite the first side and faces the window when the headrail is coupled to the structure; a light source that is configured to illuminate at least a portion of the second side of the covering material; a light sensor that is configured to detect an ambient light level on the second side of the covering material; and a control circuit that is operatively coupled to the light sensor and the light source, the control circuit configured to, when an ambient light level on the first side of the covering material exceeds the detected ambient light level on the second side of the covering material such that visualization through the covering material from the exterior space into the interior space is permitted, cause the light source to illuminate the at least a portion of the second side of the covering material so as to impede visualization through the covering material from the exterior space into the interior space.