# US 2019/0170928 A1 · Light emitting device comprising a film-based lightguide restrained by a component conducting heat from a light source > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0170928 A1 - Document ID: US20190170928A1 - Status: Published application - Kind: A1 - Application number: 16/240,765 - Filed: 2019-01-06 - Published: 2019-06-06 - Earliest claimed: 2009-01-26 - Assignees: FLEx Lighting II, LLC - Applicants: FLEx Lighting II, LLC - Inventors: Anthony John Nichol; Zane A. Coleman - Web page: https://patentgrep.com/patent/US20190170928A1 ## CPC - G02B 6/0076: {Stacked arrangements of multiple light guides of the same or different cross-sectional area} - G02B 6/0011: {the light guides being planar or of plate-like form} - G02B 6/0016: {Grooves, prisms, gratings, scattering particles or rough surfaces} - G02B 6/0018: {Redirecting means on the surface of the light guide} - G02B 6/0028: {Light guide, e.g. taper} - G02B 6/003: {Lens or lenticular sheet or layer} - G02B 6/0031: {Reflecting element, sheet or layer} - G02B 6/0036: {2-D arrangement of prisms, protrusions, indentations or roughened surfaces} - G02B 6/006: {to produce indicia, symbols, texts or the like} - G02B 6/0068: {Arrangements of plural sources, e.g. multi-colour light sources} - G02B 6/0075: {Arrangements of multiple light guides (G02B6/0028 takes precedence)} - G02B 6/0078: {Side-by-side arrangements, e.g. for large area displays} - G02B 6/0085: {Means for removing heat created by the light source from the package} - G02B 6/0088: {of the light guide or other optical sheets in the package} - G02B 6/009: {of the light source in the package (G02B6/0021 takes precedence)} - G09F 9/33: being semiconductor devices, e.g. diodes - H10F 55/18: {wherein the radiation-sensitive semiconductor devices and the electric light source share a common body having dual-functionality of light emission and light detection} - Y10T 29/49716: Converting - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A light emitting device disclosed herein includes a light source and component thermally coupled to the component. The device further includes a lightguide formed from a film. The lightguide includes an array of strips extending from an area of the film. The array of strips is positioned adjacent the array of protruding teeth, the component thermally conducts heat from the light source, and the component at least partially restrains the film relative to the component. ## Claims ### Claim 1 A light emitting device comprising: a component having a frame; a light source thermally coupled to the component; and a lightguide formed from a film, the lightguide comprising an array of strips extending from an area of the film, the array of strips are positioned along an edge of the component, each strip of the array of strips is folded in a fold region such that ends of the strips are stacked and positioned to receive light from the light source, wherein the film is at least partially restrained relative to the component and the component is a thermal transfer element that conducts heats from the light source. ### Claim 2 (depends on 1) The light emitting device of claim 1 wherein the component is a relative position maintaining element that maintains a relative position of each strip of the array of strips in the fold region. ### Claim 3 (depends on 2) The light emitting device of claim 2 wherein the component comprises a first thickness at an edge, each strip has a second thickness, and a ratio of the first thickness to the second thickness is greater than 2. ### Claim 4 (depends on 2) The light emitting device of claim 2 wherein the component is a composite comprising a polymer material and has a thermal conductivity greater than 5 watts per meter-kelvin. ### Claim 5 (depends on 1) The light emitting device of claim 1 wherein the component comprises aluminum. ### Claim 6 (depends on 1) The light emitting device of claim 1 wherein the component has a thermal conductivity greater than 5 watts per meter-kelvin. ### Claim 7 (depends on 1) The light emitting device of claim 1 wherein the light from the light source propagates by total internal reflection through the array of strips, propagates into the area of the film, and is emitted from a light emitting surface in the area of the film; and the component has an average thickness less than 5 millimeters in a direction perpendicular to the light emitting surface. ### Claim 8 (depends on 1) The light emitting device of claim 1 wherein the light source is at least one light emitting diode. ### Claim 9 (depends on 1) The light emitting device of claim 1 wherein the component is adhered to the film using an adhesive. ### Claim 10 (depends on 1) The light emitting device of claim 1 wherein the light source comprises at least two light emitting diodes thermally coupled to the component. ### Claim 11 (depends on 1) The light emitting device of claim 1 wherein the component is an elongated component with a dimension in a first direction at least twice as long as a dimension in either mutually orthogonal directions orthogonal to the first direction. ### Claim 12 A light emitting device comprising: a component elongated with a dimension in a first direction at least twice as long as a dimension in either mutually orthogonal directions orthogonal to the first direction; a lightguide formed from a film, the lightguide comprising an array of strips extending from an area of the film, the array of strips is positioned along an edge of the component, each strip of the array of strips is folded in a fold region, and a portion of the lightguide is attached to the component or restrained by the component; and a light source thermally coupled to the component and positioned to emit light that propagates into ends of the array of strips, wherein the component is a thermal transfer element that conducts heat from the light source. ### Claim 13 (depends on 12) The light emitting device of claim 12 wherein the component comprises aluminum. ### Claim 14 (depends on 12) The light emitting device of claim 12 wherein the component is a relative position maintaining element that maintains a relative position of each strip of the array of strips in the fold region. ### Claim 15 (depends on 14) The light emitting device of claim 14 wherein the component has a thermal conductivity greater than 5 watts per meter-kelvin. ### Claim 16 (depends on 15) The light emitting device of claim 15 wherein the light source comprises at least two light emitting diodes thermally coupled to the component. ### Claim 17 A light emitting device comprising: a lightguide comprising a linear array of strips extending from an area of a film; a component positioned adjacent the linear array of strips, a portion of the lightguide is attached to the component or restrained by the component, and the linear array of strips are folded in a fold region and aligned over each other to form a folded array of strips; and a light emitting diode coupled to the component and positioned to emit light into ends of the folded array of strips, wherein the component is a thermal transfer element that conducts heats from the light emitting diode. ### Claim 18 (depends on 17) The light emitting device of claim 17 wherein the component has a thermal conductivity greater than 5 watts per meter-kelvin. ### Claim 19 (depends on 17) The light emitting device of claim 17 wherein the component is a relative position maintaining element that maintains the relative position of the linear array of strips in the fold region. ### Claim 20 (depends on 19) The light emitting device of claim 19 wherein the relative position maintaining element is a composite comprising a polymer material and has a thermal conductivity greater than 5 watts per meter-kelvin.