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Systems and methods for controlling solid state lighting devices and lighting apparatus incorporating such systems and/or methods

A technology for lighting devices and light-emitting devices, which is applied in the direction of lighting devices, electrical components, lamp circuit layout, etc.

Inactive Publication Date: 2014-03-19
CREE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] One difficulty with solid-state lighting systems that include multiple solid-state devices is that the manufacturing process used for the LEDs often results in variation between individual LEDs

Method used

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  • Systems and methods for controlling solid state lighting devices and lighting apparatus incorporating such systems and/or methods
  • Systems and methods for controlling solid state lighting devices and lighting apparatus incorporating such systems and/or methods
  • Systems and methods for controlling solid state lighting devices and lighting apparatus incorporating such systems and/or methods

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Embodiment Construction

[0047] Embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout.

[0048] Embodiments of the inventive subject matter will be described more fully hereinafter with reference to the accompanying drawings in which embodiments of the inventive subject matter are shown. However, the inventive subject matter may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete,...

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PUM

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Abstract

A lighting apparatus includes at least two sets of light-emitting devices with overlapping spectra and different chromaticities, such as two sets of blue-shifted yellow (BSY) LEDs producing outputs with different yellow content. The devices may be selectively controlled, e.g., by using selective current bypass circuits, to provide a desired color temperature or other visual performance in response to a dimming control input such that, for example, a light output approximating that of an incandescent lamp may be achieved.

Description

technical field [0001] The present invention relates to lighting devices and methods, and more particularly, to solid state lighting devices and methods. Background technique [0002] Solid state lighting arrays are used in many lighting applications. For example, solid state lighting panels comprising arrays of solid state light emitting devices have been used as direct lighting sources, eg, in architectural lighting and / or accent lighting. Solid state light emitting devices may include, for example, packaged light emitting devices that include one or more light emitting diodes (LEDs), which may include inorganic LEDs (which may include semiconductor layers forming p-n junctions) and / or organic LEDs (OLEDs) (which may include an organic light-emitting layer). [0003] Visible light can include light with many different wavelengths. A two-dimensional chromaticity diagram (e.g., figure 1 The illustrated 1931 International Conference on Illumination (CIE) chromaticity diag...

Claims

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Application Information

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IPC IPC(8): H05B37/02H05B44/00
CPCH05B33/083H05B33/0863H05B45/20H05B45/48H05B45/3577
Inventor A·P·万德温
Owner CREE INC