Dithered LEDs to reduce color banding in lensed light fixtures
OwnerDean A. Wilkinsoninventor
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Abstract
An improved multi-die LED lighting apparatus for use with a lens that facilitates light dispersion while minimizing color banding and maintaining the light distribution intent of the design of the lens. The individual LED die are dithered, both rotationally and spatially relative to neighboring LED dies to minimize color banding of the LED lighting apparatus. The result is an reduction in color banding while seeking to retain the original light dispersion intent of the lens.
Claims13
A lighting apparatus comprising:
- a printed circuit board,
- a plurality of LED dies affixed to said printed circuit board, wherein said LED are spatially and rotationally dithered relative to neighboring dies so as to be configured to minimize color banding in all directions in light projected from said lighting apparatus;
- a lens configured to disperse light emitted from said LEDs of said LED dies in a broad distribution pattern to provide illumination to a wide area.
A method of assembling an LED light comprising multiple LED dies and configured to distribute light over a broad area, said method comprising the following steps:
- the step of providing a printed circuit board, wherein said printed circuit board is configured for the affixation of a plurality of LED dies, each at a different location on said printed circuit board;
- the step of providing a lens configured for distribution of light from each of said plurality of LED dies;
- the step of rotationally dithering said LED dies by rotating said LED dies at various angles to blend the bluish die and yellowish spaces in light emitted by said LED dies through said lens to overlap and blend the color temperature bands;
- the step of affixing said LED dies to said printed circuit board following said step of rotational dithereing said LED.
Dependencies are inferred from the claim text.