Optical system for multi-emitter led-based lighting devices
AssigneeLedEngin, Inc.
InventorWu Jiang
Life of this patent
Estimating the term…
Abstract
An optical system for a multi-color, multi-emitter LED-based lighting device can include a lens array. The lens array can include a number of color-mixing rod members extending parallel to each other along an optical axis, the color-mixing rod members being arranged and spaced so that the rear end of each color-mixing rod member aligns with a different one of the emitters. A beam-forming section can be formed at the front ends of the color mixing rod members. The beam-forming section can include nonplanar (e.g., convex or concave) front surface features, each nonplanar front surface feature being aligned with a front end of a corresponding one of the color-mixing rod members. The beam-forming section and color-mixing rod members can be formed as a unitary structure.
Claims24
A lens array for a multi-emitter LED-based lighting device having a plurality of LED emitters arranged on an emitter plate, the lens array comprising:
- a plurality of color-mixing rod members, each having a front end and a rear end, the color-mixing rod members extending parallel to each other along an optical axis and being arranged such that a rear end of each color-mixing-rod member aligns with a corresponding one of the plurality of LED emitters;
- and
- a beam-forming section formed at the front ends of the plurality of color mixing rod members, the beam-forming section including a plurality of nonplanar front surface features, each nonplanar front surface feature being aligned with the front end of a corresponding one of the color-mixing rod members.
An optical system for a multi-emitter LED-based lighting device having a plurality of LED emitters arranged on an emitter plate, the optical system comprising:
- a lens array having:
- a plurality of color-mixing rod members, each having a front end and a rear end, the color-mixing rod members extending parallel to each other along an optical axis and being arranged such that a rear end of each color-mixing-rod member aligns with a corresponding one of the plurality of LED emitters;
- and
- a beam-forming section formed at the front ends of the plurality of color mixing rod members, the beam-forming section including a plurality of nonplanar front surface features, each nonplanar front surface feature being aligned with the front end of a corresponding one of the color-mixing rod members;
- and
- a condenser lens positioned in front of the lens array.
A lighting device comprising:
- an emitter plate;
- a plurality of LED emitters arranged on the emitter plate, wherein each emitter includes a plurality of LED chips;
- and
- a lens array having:
- a plurality of color-mixing rod members, each having a front end and a rear end, the color-mixing rod members extending parallel to each other along an optical axis and being arranged such that a rear end of each color-mixing-rod member aligns with a corresponding one of the plurality of LED emitters;
- and
- a beam-forming section formed at the front ends of the plurality of color mixing rod members, the beam-forming section including a plurality of nonplanar front surface features, each nonplanar front surface feature being aligned with the front end of a corresponding one of the color-mixing rod members.
22-33. (canceled)
A lighting device comprising:
- a planar emitter plate;
- a plurality of LED emitters arranged on the emitter plate, wherein each emitter includes a plurality of LED chips, wherein each of the LED emitters includes LED chips of at least two different colors, wherein the LED emitters are arranged in a hexagonal pattern, and wherein different LED emitters are oriented at different rotational angles in a plane defined by the emitter plate;
- and
- a lens array having:
- a plurality of color-mixing rod members, each having a front end and a rear end, the color-mixing rod members extending parallel to each other along an optical axis and being arranged such that a rear end of each color-mixing-rod member aligns with a corresponding one of the plurality of LED emitters, wherein each of the color-mixing rod members has a square cross section in a plane transverse to the optical axis and each of the color-mixing rod members is oriented at a rotational angle matching the rotational angle of the corresponding one of the LED emitters;
- and
- a beam-forming section formed at the front ends of the plurality of color mixing rod members, the beam-forming section including a plurality of concave front surface features, each concave front surface feature being aligned with the front end of a corresponding one of the color-mixing rod members, the beam-forming section further including a plurality of convex rear surface features, each convex rear surface feature being aligned with a corresponding one of the concave surface features of the front surface,
- wherein the color-mixing rod members and the beam-forming section are formed as a unitary structure;
- and
- a condenser lens placed in front of the lens array.
Dependencies are inferred from the claim text.