Method and device for lighting a space using an LED string
First Claim
1. An apparatus comprising an LED module for lighting at least part of a space, the LED module comprising:
- an LED string, the LED string comprising a first LED segment and at least a second LED segment, wherein each LED segment comprises at least one LED;
wherein the LED string is adapted to be powered by a rectified dimmable AC voltage the rectified dimmable AC voltage comprising a plurality of dimming levels;
wherein the first LED segment is adapted to be powered when the rectified AC voltage is above a first voltage level, and the first LED segment and the second LED segment are adapted to be powered when the rectified AC voltage is above a second voltage level higher than the first voltage level,wherein the first LED segment is arranged to radiate light in a first beam, and the second LED segment is arranged to radiate light in a second beam,wherein one of;
(1) the first LED segment is disposed opposing the second LED segment, and the first LED segment is disposed such the first beam radiates light in a direction opposing the second beam, and (2) the second beam is wider than the first beam, andwherein, the light radiated by the first LED segment and by the second LED segment changes with the dimming level of the rectified dimmable AC voltage.
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Accused Products
Abstract
In a method of lighting at least part of a space, a light emitting diode (LED) string is used. The LED string comprises a first LED segment and at least one further LED segment, which are connected in series, each LED segment comprising at least one LED. The LED string is powered by a rectified AC voltage. The first LED segment is powered when the rectified AC voltage is above a first voltage level, and the first LED segment and the further LED segment are powered when the rectified AC voltage is above a second voltage level higher than the first voltage level. The first LED segment is arranged to radiate light to a first volume of the space, and the further LED segment is arranged to radiate light to a second volume of the space, the first volume being at least partly different from the second volume. The first volume may at least partly overlap the second volume.
11 Citations
20 Claims
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1. An apparatus comprising an LED module for lighting at least part of a space, the LED module comprising:
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an LED string, the LED string comprising a first LED segment and at least a second LED segment, wherein each LED segment comprises at least one LED; wherein the LED string is adapted to be powered by a rectified dimmable AC voltage the rectified dimmable AC voltage comprising a plurality of dimming levels; wherein the first LED segment is adapted to be powered when the rectified AC voltage is above a first voltage level, and the first LED segment and the second LED segment are adapted to be powered when the rectified AC voltage is above a second voltage level higher than the first voltage level, wherein the first LED segment is arranged to radiate light in a first beam, and the second LED segment is arranged to radiate light in a second beam, wherein one of;
(1) the first LED segment is disposed opposing the second LED segment, and the first LED segment is disposed such the first beam radiates light in a direction opposing the second beam, and (2) the second beam is wider than the first beam, andwherein, the light radiated by the first LED segment and by the second LED segment changes with the dimming level of the rectified dimmable AC voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of lighting, using a light emitting diode (LED) string, the LED string comprising a first LED segment and at least a second LED segment, each LED segment comprising at least one LED, the LED string being powered by a rectified dimmable AC voltage, the rectified dimmable AC voltage comprising a plurality of dimming levels, the method comprising:
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powering the first LED segment when the rectified dimmable AC voltage is above a first voltage level, and powering the first LED segment and the second LED segment when the rectified AC voltage is above a second voltage level higher than the first voltage level, arranging the first LED segment to radiate light in a first beam, and the second LED segment is arranged to radiate light in a second beam, wherein one of;
(1) the first LED segment is disposed opposing the second LED segment, and the first LED segment is disposed such the first beam radiates light in a direction opposing the second beam, and (2) the second beam is wider than the first beam, andwherein the light radiated by the first LED segment and by the second LED segment changes with the dimming level of the rectified dimmable AC voltage.
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Specification