LED flash ring surrounding camera lens
First Claim
1. An illumination system, comprising:
- a ring-shaped light guide;
a first light emitting diode (LED) encapsulated in the ring-shaped light guide and configured to emit light into the ring-shaped light guide; and
a light extraction feature configured to direct at least a portion of the emitted light out of the ring-shaped light guide.
2 Assignments
0 Petitions
Accused Products
Abstract
A flash system for an electronic device includes a ring-shaped light guide having a central opening. A camera lens is positioned in or behind the opening. A first light emittting diode (“LED”) is mounted on a printed circuit board (“PCB”), and the LED and PCB are encapsulated by a molded light guide of the flash system. An identical LED and PCB are encapsulated at an opposite end of the molded light guide (i.e., 180 degrees away). The back surfaces of each PCB diffusively reflects light from the LED on the other PCB. Light extraction features on the light guide surface uniformly leak out light from the LEDs. The light emission profile of the light guide has a peak axially aligned with the central opening of the light guide and rolls off to the edge of the camera'"'"'s field of view.
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Citations
20 Claims
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1. An illumination system, comprising:
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a ring-shaped light guide; a first light emitting diode (LED) encapsulated in the ring-shaped light guide and configured to emit light into the ring-shaped light guide; and a light extraction feature configured to direct at least a portion of the emitted light out of the ring-shaped light guide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for providing illumination, the method comprising:
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emitting, with a first light-emitting diode (LED) encapsulated a ring-shaped light guide, light into the ring-shaped light guide; and extracting, with a light extraction feature positioned on the ring-shaped light guide, at least a portion of the emitted light out of the ring-shaped light guide. - View Dependent Claims (17, 18)
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19. An illumination system, comprising:
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a ring-shaped light guide shaped to guide light in a first circular direction around the ring-shaped light guide, and guide light in a second circular direction, opposite the first circular direction, around the ring-shaped light guide; a first light-emitting diode (LED) encapsulated in the ring-shaped light guide and configured to emit light into the ring-shaped light guide in the first circular direction; a second LED encapsulated in the ring-shaped light guide and configured to emit light into the ring-shaped light guide in the first circular direction; and a light extraction feature configured to direct at least a portion of the emitted light out of the ring-shaped light guide. - View Dependent Claims (20)
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Specification