# US 2019/0316754 A1 · Solid State Bidirectional Light Sheet Having Vertical Orientation

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- Number: US 2019/0316754 A1
- Document ID: US20190316754A1
- Status: Published application
- Kind: A1
- Application number: 16/193,359
- Filed: 2018-11-16
- Published: 2019-10-17
- Earliest claimed: 2010-11-01
- Assignees: Quarkstar LLC
- Applicants: Quarkstar LLC
- Inventors: Wilson Dau; Louis Lerman; Allan Brent York
- Web page: https://patentgrep.com/patent/US20190316754A1

## CPC

- 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}
- F21K 9/60: Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21S 8/04: intended only for mounting on a ceiling or the like overhead structures (F21S8/02 takes precedence; {details of ceiling bases F21V21/03})
- F21S 8/046: {having multiple lighting devices, e.g. connected to a common ceiling base}
- F21S 8/06: by suspension
- F21S 8/068: {from a stretched wire}
- F21V 5/04: of lens shape
- F21V 5/10: comprising photoluminescent material
- F21V 7/00: Reflectors for light sources (characterised by cooling arrangements F21V29/505)
- F21V 21/14: Adjustable mountings
- F21V 21/16: using wires or cords
- F21V 23/06: the elements being coupling devices {, e.g. connectors}
- F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements
- F21Y 2107/90: on two opposite sides of supports or substrates
- F21Y 2109/00: Light sources with light-generating elements disposed on transparent or translucent supports or substrates
- F21Y 2115/10: Light-emitting diodes [LED]
- H05K 1/189: characterised by the use of flexible or folded printed circuits
- H05K 2201/10106: Light emitting diode [LED]
- H10W 90/00: Package configurations
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- 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
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- 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
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

A solid state, bidirectional light sheet and method of fabricating the sheet are disclosed. In one embodiment, bare LED chips have top and bottom electrodes, where the bottom electrode is a large reflective electrode. An array of LEDs (e.g., 500 LEDs) is sandwiched between at least two transparent substrates having conductors bonded to the electrodes without wires. Various ways to connect the LEDs in series are described along with various embodiments. The light sheets are formed to emit light from opposite surfaces of the light sheet to create a bidirectional light sheet. The light sheet may be suspended from a ceiling to be perpendicular to the ceiling, or the angles of the light sheet may be adjusted. The suspended light sheet may form a cylinder for uniform illumination of the floor and ceiling. Lenses may be formed in the light sheet to emit light at any peak intensity angle to achieve any light emission pattern.

## Claims

### Claim at position 1

1-20. (canceled)

### Claim 21

A lighting device comprising:
two or more bidirectional light sheets, each of the bidirectional light sheets having opposing first and second light emitting surfaces; and
a planar base, wherein each of the two or more bidirectional light sheets has an edge affixed to the planar base, such that the first and second light emitting surfaces of each of the bidirectional light sheets form an angle different from zero with the planar base.