发明名称 |
Control system for uniform movement of multiple roller shades |
摘要 |
A system for controlling a roller shade having a roller tube windingly receiving a shade fabric varies roller tube rotational speed for constant linear shade speed. The desired linear shade speed, roller tube diameter and shade fabric thickness and length are stored in a memory for use by a microprocessor. Preferably, the roller tube rotational speed is varied by the microprocessor depending on shade position determined by signals from Hall effect sensors. The microprocessor maintains a counter number that is increased or decreased depending on direction of rotation. Based on the counter number, the microprocessor determines shade position and a corrected rotational speed for the desired linear shade speed. Preferably, the microprocessor controls roller tube rotational speed using a pulse width modulated signal. The system may be used to control first and second roller shades having roller tubes of differing diameters or shade fabrics of varying thicknesses.
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申请公布号 |
US7537040(B2) |
申请公布日期 |
2009.05.26 |
申请号 |
US20070897325 |
申请日期 |
2007.08.30 |
申请人 |
LUTRON ELECTRONICS CO., INC. |
发明人 |
CARMEN, JR. LAWRENCE R.;DOLAN DAVID J.;WALKER MARK A. |
分类号 |
A47G5/02;E06B9/174;E06B9/68 |
主分类号 |
A47G5/02 |
代理机构 |
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