# US 2017/0254518 A1 · Flexible solid-state illumination devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0254518 A1 - Document ID: US20170254518A1 - Status: Published application - Kind: A1 - Application number: 15/450,015 - Filed: 2017-03-05 - Published: 2017-09-07 - Earliest claimed: 2016-03-06 - Assignees: S.V.V. Technology Innovations, Inc. - Inventors: Sergiy Vasylyev - Web page: https://patentgrep.com/patent/US20170254518A1 ## CPC - F21V 21/14: Adjustable mountings - F21V 9/02: for simulating daylight (F21V9/04, F21V9/06 take precedence) - F21V 9/08: for producing coloured light, e.g. monochromatic; for reducing intensity of light (with provision for controlling the colour F21V9/40) - F21V 9/30: Elements containing photoluminescent material distinct from or spaced from the light source (shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40) - F21V 13/14: the elements being filters or photoluminescent elements, reflectors and refractors - F21V 17/007: {with provision for shipment or storage} - F21V 19/003: {Fastening of light source holders, e.g. of circuit boards or substrates holding light sources} - G02B 6/0055: {Reflecting element, sheet or layer} - G02B 6/0068: {Arrangements of plural sources, e.g. multi-colour light sources} - G02B 6/0073: {Light emitting diode [LED]} - G02B 6/0083: {Details of electrical connections of light sources to drivers, circuit boards, or the like} - F21V 33/006: {General building constructions or finishing work for buildings, e.g. roofs, gutters, stairs or floors; Garden equipment; Sunshades or parasols} - F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements - F21Y 2107/70: on flexible or deformable supports or substrates, e.g. for changing the light source into a desired form - F21Y 2115/10: Light-emitting diodes [LED] - F21Y 2115/30: Semiconductor lasers - 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 - 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 A flexible illumination panel having a layered sheet-form configuration and including a bottom flexible sheet of a rigid material, a top flexible sheet formed by an optically transmissive, elastic material, and a two-dimensional array of light emitting diodes (LEDs) mounted to the bottom flexible sheet and encapsulated between the top and bottom flexible sheets. The LEDs may further include rigid substrates (submounts) attached to the bottom flexible sheet. ## Claims ### Claim 1 A solid-state illumination device, comprising: a first flexible sheet defined by a first broad-area surface and an opposing second broad-area surface that is parallel to the first broad-area surface; a plurality of rigid substrates distributed over at least a substantial portion of the area of the first flexible sheet according to a two-dimensional pattern and bonded to the first broad-area surface with a good thermal contact; a plurality of LED sources mounted to the plurality of rigid substrates with a good thermal contact; and a second flexible sheet defined by a third broad-area surface and an opposing fourth broad-area surface that is generally parallel to the third broad-area surface; wherein the first flexible sheet includes at least one layer of a rigid material having a Young's modulus of at least 1 GPa, wherein the second flexible sheet is formed from an optically transmissive material having a Young's modulus less than 10 MPa and an elastic range of at least 50%, and wherein the second flexible sheet is disposed in contact with the first flexible sheet so as to form a layered, flexible sheet-form structure hermetically encapsulating at least the plurality of LED sources. ### Claim 2 (depends on 1) A solid-state illumination device as recited in claim 1, wherein the flexible sheet-form structure is monolithic and generally free from air spaces. ### Claim 3 (depends on 1) A solid-state illumination device as recited in claim 1, wherein the flexible sheet-form structure has a bend radius below 100 mm. ### Claim 4 (depends on 1) A solid-state illumination device as recited in claim 1, wherein a combined thickness of the first and second flexible sheets is less than 3 mm and each of length and width dimensions of the first and second flexible sheets is greater than 100 mm. ### Claim 5 (depends on 1) A solid-state illumination device as recited in claim 1, wherein a spacing distance between adjacent LED sources is less than a thickness of the second flexible sheet. ### Claim 6 (depends on 1) A solid-state illumination device as recited in claim 1, wherein a spacing distance between adjacent LED sources is greater than a thickness of the second flexible sheet. ### Claim 7 (depends on 1) A solid-state illumination device as recited in claim 1, wherein the first flexible sheet is formed by a thin sheet of a rigid, heat conducting material and is configured for spreading heat generated by each of the plurality of LED sources both longitudinally and laterally. ### Claim 8 (depends on 1) A solid-state illumination device as recited in claim 1, wherein the flexible support substrate. ### Claim 9 (depends on 1) A solid-state illumination device as recited in claim 1, wherein the first flexible sheet includes at least one layer formed by a metal foil. ### Claim 10 (depends on 1) A solid-state illumination device as recited in claim 1, wherein the material of the first flexible sheet has a hardness between durometer hardness values of 10 Shore A and 90 Shore A. ### Claim 11 (depends on 1) A solid-state illumination device as recited in claim 1, wherein each of the plurality of rigid substrates has dimensions that are substantially smaller than a distance between adjacent rigid substrates. ### Claim 12 (depends on 1) A solid-state illumination device as recited in claim 1, wherein the first broad-area surface has a hemispherical surface reflectance of at least 85%. ### Claim 13 (depends on 1) A solid-state illumination device as recited in claim 1, wherein the first and second flexible sheets are configured for recycling light propagating within the second flexible sheet in response to a total internal reflection and a diffuse or specular reflection. ### Claim 14 (depends on 1) A solid-state illumination device as recited in claim 1, comprising a grid of flexible electrical connections interconnecting the plurality of LED sources. ### Claim 15 (depends on 1) A solid-state illumination device as recited in claim 1, wherein the plurality of LED sources includes at least 10000 individual light emitting diodes. ### Claim 16 (depends on 1) A solid-state illumination device as recited in claim 1, wherein a maximum nominal power consumption PLED_MAX of each individual LED source is less than 4000/DLED, where DLED is an average distribution density of the plurality of LED sources. ### Claim 17 (depends on 1) A solid-state illumination device as recited in claim 1, wherein an average operational areal electric power density of the plurality of LED sources is between a minimum of 50 W/m2 and a maximum of 1500 W/m2, and wherein the second flexible sheet is configured to dissipate waste heat generated by the plurality of LED sources primarily by a natural convection and radiative heat transfer from the second broad-area surface. ### Claim 18 (depends on 1) A solid-state illumination device as recited in claim 1, wherein at least two of the plurality of LED sources are disposed in optical communication with each other. ### Claim 19 (depends on 1) A solid-state illumination device as recited in claim 1, wherein the second flexible sheet comprises a plurality of grooves formed in spacing areas between the LED sources. ### Claim 20 (depends on 1) A solid-state illumination device as recited in claim 1, wherein the second flexible sheet comprises a plurality of lenses formed in a surface of the second flexible sheet and disposed in registration with the plurality of LED sources.