Arrangement of solid state light sources and lamp using same

摘要

Arrangements of solid state light sources for color-mixing, and light sources including the same, are provided. A substrate has a plurality of different color LED chips coupled thereto. The emitted light is mixed to produce a white light output. The LED chips are arranged on the substrate in a manner that improves color-mixing, for example, by forming LED sets including one or more LED chips of different colors, by skewing the LED chips, and/or by forming a non-rectangular array or a circular array of LED sets and/or chips. The color-mixing LED arrangement may be used in a lamp or other light source together with collimating optics to collimate and further mix the color-mixed light output from the LED arrangement. The color-mixing LED arrangement may be provided as a single package with multiple LED chips or as multiple packages of one or more LED chips.

主权项

1. An arrangement of solid state light sources, comprising:
a substrate (112, 312, 712); and a plurality of solid state light source sets (111, 311a-g, 711a-g) arranged on respective solid state light source regions of the substrate (112, 312, 712), each of the solid state light source sets including at least a first color solid state light source chip (114, 314, 714), a second color solid state light source chip (115, 315, 715), and a third color solid state light source chip (116, 316, 716), wherein within each said light source set (111, 311a-g, 711a-g) said first, second, and third solid state light source chips (114-115, 314-316, 714-716) are coupled to the substrate (112, 312, 712) and are arranged immediately adjacent to each other, the first color solid state light source chip (114, 314, 714) being configured to emit light of a first wavelength, the second color solid state light source chip (115, 315, 715) being configured to emit light of a second wavelength different than the first wavelength, and the third color solid state light source chip (116, 316, 716) being configured to emit light of a third wavelength different than the first and the second wavelengths, wherein each of the solid state light source sets (111, 311a-g, 711a-g) is immediately adjacent at least two other solid state light source sets (111, 311a-g, 711a-g), wherein the solid state light source chips (114-115, 314-316, 714-716) in at least one of the solid state light source sets (111, 311a-g, 711a-g) are skewed relative to the solid state light source chips(114-115, 314-316, 714-716) in at least another of the solid state light source sets (111, 311a-g, 711a-g), and wherein at least a subset of the solid state light source sets (111, 311a-g, 711a-g), said subset comprising at least half of all the solid state light source sets (111, 311a-g, 711a-g) on said substrate (112, 312, 712), is located on an imaginary circle (318), respective said solid state light source sets (111, 311a-g, 711a-g) within said subset being spaced from an immediately adjacent solid state light source set (111, 311a-g, 711a-g) by a distance exceeding a separation amount between immediately adjacent first, second, and third solid state light source chips (114-115, 314-316, 714-716) within each solid state light source set (111, 311a-g, 711a-g), and wherein the first color solid state light source chips (114, 314, 714) are connected in electrical series defining a first string comprising a plurality of said first color solid state light source chips (114, 314, 714), the second color solid state light source chips (115, 315, 715) are connected in electrical series defining a second string comprising a plurality of said second color solid state light source chips (115, 315, 715, and the third color solid state light source chips (116, 316, 716) are connected in electrical series defining a third string comprising a plurality of said third color solid state light source chips (116, 316, 716), and wherein the first, second and third strings of solid state light source chips (114-116, 314-316, 714-716) are arranged in approximate concentric first, second and third circles each generally concentric with said imaginary circle (318).