# US 2014/0192558 A1 · Illumination Systems Providing Direct and Indirect Illumination

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- Number: US 2014/0192558 A1
- Document ID: US20140192558A1
- Status: Published application
- Kind: A1
- Application number: 14/140,327
- Filed: 2013-12-24
- Published: 2014-07-10
- Earliest claimed: 2012-09-13
- Assignees: Quarkstar LLC
- Applicants: Quarkstar LLC
- Inventors: Wilson Dau; Louis Lerman; Ingo Speier
- Web page: https://patentgrep.com/patent/US20140192558A1

## CPC

- F21S 8/06: by suspension
- F21K 9/61: using light guides
- F21S 8/036: {by means of a rigid support, e.g. bracket or arm}
- F21V 5/10: comprising photoluminescent material
- F21V 7/00: Reflectors for light sources (characterised by cooling arrangements F21V29/505)
- F21V 7/0008: {providing for indirect lighting}
- F21V 7/0016: {on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes}
- F21V 23/003: {the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array}
- F21V 29/763: {the planes containing the fins or blades having the direction of the light emitting axis}
- G02B 6/00: Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B 6/0001: {specially adapted for lighting devices or systems (lighting or signalling on vehicles using light guides B60Q1/00; lighting devices for vehicle dashboards B60Q3/10; lighting devices for vehicle interior using light guides B60Q3/62; lighting devices mounted on the vehicle rear part using light guides F21S43/235; measuring arrangements having light conducting pointers G01D13/265; illumination of liquid crystal displays G02F1/1336; illuminated signs G09F13/00)}
- G02B 6/001: {the light being emitted along at least a portion of the lateral surface of the fibre}
- G02B 6/0011: {the light guides being planar or of plate-like form}
- G02B 6/0045: {by shaping at least a portion of the light guide}
- G02B 6/005: {provided by one optical element, or plurality thereof, placed on the light output side of the light guide}
- G02B 6/0055: {Reflecting element, sheet or layer}
- G02B 6/0073: {Light emitting diode [LED]}
- G02B 6/12004: {Combinations of two or more optical elements}
- H10H 20/855: Optical field-shaping means, e.g. lenses
- F21Y 2103/10: comprising a linear array of point-like light-generating elements
- F21Y 2115/10: Light-emitting diodes [LED]
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

Illumination devices are described for illuminating a target area, e.g., floors of a room, using solid-state light sources. In general, an illumination device includes a first light guide extending along a first plane, the first light guide to receive light from first light emitting elements (LEEs) and guide the light in a first direction in the first plane; a second light guide extending along the first plane, the second light guide to receive light from second LEEs and guide the light in a second direction in the first plane opposite to the first direction; a first redirecting optic to receive light from the first light guide and direct the light in first and second angular ranges; and a second redirecting optic to receive light from the second light guide and direct the light in third and fourth angular ranges, where the first, second, third and fourth angular ranges are different.

## Claims

### Claim 1

An illumination system, comprising:
multiple light emitting elements (LEEs);
a first light guide extending along a first plane, the first light guide being positioned and arranged to receive light from at least some of the LEEs and guide the light in a first direction in the first plane;
a second light guide extending along the first plane, the second light guide being positioned and arranged to receive light from at least some other of the LEEs and guide the light in a second direction in the first plane opposite to the first direction;
a first redirecting optic positioned and arranged to receive light from the first light guide and direct the light in a first angular range and a second angular range; and
a second redirecting optic positioned and arranged to receive light from the second light guide and direct the light in a third angular range and a fourth angular range,
wherein the first, second, third and fourth angular ranges are different.

### Claim 2 (depends on 1)

The illumination system of claim 1, further comprising a power controller arranged and configured to power the multiple LEEs dependently or independently.

### Claim 3 (depends on 2)

The illumination system of claim 2, wherein the at least some of the multiple LEEs from which the first light guide receives the light are controlled independently from the at least some other of the multiple LEEs from which the second light guide receives the light.

### Claim 4 (depends on 1)

The illumination system of claim 1, wherein the multiple LEEs comprise light-emitting diodes.

### Claim 5 (depends on 1)

The illumination system of claim 1, wherein
each of the light guides and the redirecting optics has a longitudinal dimension that is (i) parallel to the first plane and (i) orthogonal to the first and second directions, and
the multiple LEEs are distributed along the longitudinal dimension.

### Claim 6 (depends on 5)

The illumination system of claim 5, wherein
each of prevalent propagation directions of the first angular range and the second angular range has a component that is opposite the first direction, and
each of prevalent propagation directions of the third angular range and the fourth angular range has a component that is opposite the second direction.

### Claim 7 (depends on 6)

The illumination system of claim 6, wherein
the first angular range and the second angular range are symmetrical with respect to the first plane, and
the third angular range and the fourth angular range are symmetrical with respect to the first plane.

### Claim 8 (depends on 6)

The illumination system of claim 6, wherein
the first angular range and the third angular range are symmetrical with respect to a second plane that (i) is orthogonal to the first plane and (ii) contains the longitudinal dimension, and
the second angular range and the fourth angular range are symmetrical with respect to the second plane.

### Claim at position 9

9-21. (canceled)