Electrically controllable window treatment system to control...

Details Electrically controllable window treatment system to control... Electrically controllable window treatment system to control...

2011-06-21

2011-06-21

Cariaso, Alan (Department: 2885)

Illumination

Light source and modifier

Condition responsive

C362S277000, C362S319000, C160S005000, C250S203400

Reexamination Certificate

active

07963675

ABSTRACT:
A system for reducing sun glare through an opening into a space, the system comprising an electrically controllable window treatment operable to alter the amount of daylight entering the space through the opening; a first sensor mounted within the space and characterized by a sensor gain, the first sensor operable to sense a level of illumination in the space; and a control system operable: to compare the sensed illumination level in the space to a dead-band having upper and lower thresholds; to adjust during a time period when glare from the sun can occur through the opening at least one of: (a) the upper threshold of the dead-band, (b) the lower threshold of the dead-band, and (c) the sensor gain of the first sensor; and to adjust the window treatment in response to the sensed level of illumination to reduce the sun glare.

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