LED illumination device for projecting light downward and to the side
First Claim
Patent Images
1. An illumination source comprising:
- a light emitting diode (LED) light source, wherein an LED central axis is at 0°
; and
a reflector, wherein the reflector comprises at least four contiguous segments;
wherein at least a portion of light emitted between 0° and
+60°
from the LED light source is reflected by a first segment of the at least four contiguous segments of the reflector to angles between −
30° and
−
50°
;
wherein at least a portion of the light emitted between −
10° and
+10°
from the LED light source is reflected by a last segment of the at least four contiguous segments of the reflector to angles between −
130° and
−
160°
, wherein the last segment crosses directly in front of the central axis of the LED;
wherein at least a portion of the light emitted between −
20° and
−
70°
from the LED light source is not reflected by the reflector.
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Accused Products
Abstract
An LED (light emitting diode) illumination device that can generate a uniform light output illumination pattern. The illumination device includes an array of LEDs, each having a LED central axis. The LED central axis of the array of LEDs is angled approximately toward a central point. The illumination source includes a reflector with a conic or conic-like shape. The reflector wraps around the front of the LED to redirect the light emitted along a LED central axis.
55 Citations
13 Claims
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1. An illumination source comprising:
-
a light emitting diode (LED) light source, wherein an LED central axis is at 0°
; anda reflector, wherein the reflector comprises at least four contiguous segments; wherein at least a portion of light emitted between 0° and
+60°
from the LED light source is reflected by a first segment of the at least four contiguous segments of the reflector to angles between −
30° and
−
50°
;wherein at least a portion of the light emitted between −
10° and
+10°
from the LED light source is reflected by a last segment of the at least four contiguous segments of the reflector to angles between −
130° and
−
160°
, wherein the last segment crosses directly in front of the central axis of the LED;wherein at least a portion of the light emitted between −
20° and
−
70°
from the LED light source is not reflected by the reflector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An illumination source comprising:
-
a light emitting diode (LED) light source, wherein an LED central axis is at 0°
;a reflector, wherein the reflector comprises at least four contiguous segments; wherein at least a portion of light emitted between 0° and
+90°
from the LED light source is reflected by a first segment of the at least four contiguous segments of the reflector to angles between −
45° and
−
70°
, wherein the first segment crosses directly in front of the central axis of the LED;wherein at least a portion of the light emitted between −
10° and
−
40°
from the LED light source is reflected by a last segment of the at least four contiguous segments of the reflector to angles between −
100° and
−
130°
;wherein at least a portion of the light emitted between −
20° and
−
70°
from the LED light source is not reflected by the reflector. - View Dependent Claims (12, 13)
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Specification
-
- Resources
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Current AssigneeDialight Corporation (Dialight PLC)
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Original AssigneeDialight Corporation (Dialight PLC)
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InventorsPeck, John P.
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Primary Examiner(s)Hanley, Britt D
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Application NumberUS12/580,840Publication NumberTime in Patent Office1,768 DaysField of SearchNoneUS Class Current362/235CPC Class CodesF21K 9/68 Details of reflectors formi...F21V 7/005 with an elongated shape to ...F21V 7/04 Optical designF21V 7/09 with a combination of diffe...F21W 2131/103 of streets or roadsF21Y 2103/10 comprising a linear array o...F21Y 2115/10 Light-emitting diodes [LED]
