# US 2026/0101616 A1 · Flexible color filter and manufacturing method thereof, full-color micro light-emitting diode device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0101616 A1 - Document ID: US20260101616A1 - Status: Published application - Kind: A1 - Application number: 18/928,034 - Filed: 2024-10-27 - Published: 2026-04-09 - Earliest claimed: 2020-05-19 - Assignees: Tcl China Star Optoelectronics Technology Co., Ltd. - Applicants: TCL China Star Optoelectronics Technology Co., Ltd. - Inventors: Linglian WU - Web page: https://patentgrep.com/patent/US20260101616A1 ## CPC - H10H 20/8514: {characterised by their shape, e.g. plate or foil} - H10H 20/856: Reflecting means - G02B 5/201: {in the form of arrays} - H10H 20/01: Manufacture or treatment - H10H 20/814: having reflecting means, e.g. semiconductor Bragg reflectors - H10H 20/8515: {not being in contact with the bodies} - H10H 20/0361: {of wavelength conversion means} - H10H 20/855: Optical field-shaping means, e.g. lenses - H10W 90/00: Package configurations - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A flexible color filter, a method of manufacturing thereof, and a full-color micro light-emitting diode device are provided. The full-color micro light-emitting diode device includes a flexible color filter. The flexible color filter includes a polymer resin substrate, a reflective layer, a light diffusion layer, and a quantum dot layer. ## Claims ### Claim 1 A color filter, comprising: a polymer resin substrate, extending in a first direction and comprising a first surface and a second surface opposite in a second direction different from the first direction, wherein the polymer resin substrate is disposed with a plurality of receiving grooves and the receiving grooves are recessed from the first surface toward the second surface and arranged at intervals in the first direction; a light diffusion layer, extending along an inner side wall of each of the receiving grooves in the second direction; and a quantum dot layer, comprising at least one of a green light quantum dot layer or a red light quantum dot layer disposed above a first bottom surface of at least one receiving groove of the receiving grooves, wherein each of the green light quantum dot layer and the red light quantum dot layer has a third surface and a fourth surface opposite in the second direction and the fourth surface is closer to the polymer resin substrate than the third surface in the second direction, wherein a first cavity is formed between the third surface of at least one of the green light quantum dot layer or the red light quantum dot layer and the first surface. ### Claim 2 (depends on 1) The color filter according to claim 1, wherein in one or more of the plurality of receiving grooves different from the at least one receiving groove, a second cavity different from a first cavity is formed between the first surface and a second bottom surface of the receiving groove and the second bottom surface is different from the first bottom surface. ### Claim 3 (depends on 1) The color filter according to claim 1, further comprising: a reflective layer disposed between the at least one of the green light quantum dot layer or the red light quantum dot layer and the polymer resin substrate on the first bottom surface of the at least one receiving groove. ### Claim 4 (depends on 3) The color filter according to claim 3, wherein the reflective layer comprises a distributed Bragg reflector. ### Claim 5 (depends on 4) The color filter according to claim 4, wherein the reflective layer configured to refract blue light incident from the quantum dot layer and reflect the blue light back to the quantum dot layer and the reflective layer has high reflectivity and low transmittance to the blue light ### Claim 6 (depends on 3) The color filter according to claim 3, wherein a thickness and a material of the reflective layer disposed between the green light quantum dot layer and the polymer resin substrate are different from that of the reflective layer disposed between the red light quantum dot layer and the polymer resin substrate. ### Claim 7 (depends on 1) The color filter according to claim 1, wherein the polymer resin substrate is formed by curing one of polydimethylsiloxane, silicone or resin. ### Claim 8 (depends on 1) The color filter according to claim 1, wherein the receiving grooves are formed by nano-imprinting or etching the polymer resin substrate. ### Claim 9 (depends on 1) The color filter according to claim 1, wherein the light diffusion layer is formed by mixing and curing a light diffusion powder and a matrix adhesive. ### Claim 10 (depends on 9) The color filter according to claim 9, wherein a weight proportion of the light diffusion powder within the light diffusion layer is 5%-20%. ### Claim 11 (depends on 9) The color filter according to claim 9, wherein the light diffusion powder comprises an organic material and an inorganic material; the organic material comprises one or more of acrylate (PMMA), polystyrene (PS), organic silicone microspheres, and silicon microspheres; the inorganic material comprises one or more of nano-aluminum oxide, nano-silver, and nano-gold; and the matrix adhesive is formed by mixing one or more materials of acrylate adhesive, polyurethane adhesive, and epoxy resin adhesive. ### Claim 12 (depends on 1) The color filter according to claim 1, wherein the quantum dot layer has a thickness of 450 nm. ### Claim 13 (depends on 1) The color filter according to claim 1, wherein each of the green light quantum dot layer and the red light quantum dot layer has a material composed of a mixture of one of a quantum dot solution, a quantum dot powder, or a quantum dot-polymer powder. ### Claim 14 A full-color micro light-emitting diode device, comprising light sources and a color filter, wherein the color filter comprises: a polymer resin substrate, extending in a first direction and comprising a first surface and a second surface opposite in a second direction different from the first direction, wherein the polymer resin substrate is disposed with a plurality of receiving grooves and the receiving grooves are recessed from the first surface toward the second surface and arranged at intervals in the first direction; a light diffusion layer, extending along an inner side wall of each of the receiving grooves in the second direction; and a quantum dot layer, comprising at least one of a green light quantum dot layer or a red light quantum dot layer disposed above a first bottom surface of at least one receiving groove of the receiving grooves, wherein each of the green light quantum dot layer and the red light quantum dot layer has a third surface and a fourth surface opposite in the second direction and the fourth surface is closer to the polymer resin substrate than the third surface in the second direction, wherein a first cavity is formed between the third surface of at least one of the green light quantum dot layer or the red light quantum dot layer and the first surface, and wherein the light sources are received in the plurality of receiving grooves, respectively. ### Claim 15 (depends on 14) The full-color micro light-emitting diode device according to claim 14, wherein a spacing is between the light diffusion layer and the quantum dot layer of the color filter and the light sources. ### Claim 16 (depends on 14) The full-color micro light-emitting diode device according to claim 14, further comprising: a blue light back plate attached to one side of the color filter disposed with the receiving groove, wherein the light sources emit blue color light, arranged at intervals in the direction, and disposed on the blue light back plate, each of the light sources is disposed corresponding to each of the receiving grooves, and each of the light sources is disposed at a notch position of each of the receiving grooves. ### Claim 17 (depends on 14) The full-color micro light-emitting diode device according to claim 14, wherein in one or more of the plurality of receiving grooves different from the at least one receiving groove, a second cavity different from a first cavity is formed between the first surface and a second bottom surface of the receiving groove and the second bottom surface is different from the first bottom surface. ### Claim 18 (depends on 14) The full-color micro light-emitting diode device according to claim 14, wherein the color filter further comprises a reflective layer disposed between the at least one of the green light quantum dot layer or the red light quantum dot layer and the polymer resin substrate on the first bottom surface of the at least one receiving groove. ### Claim 19 (depends on 18) The full-color micro light-emitting diode device according to claim 18, wherein the reflective layer comprises a distributed Bragg reflector. ### Claim 20 (depends on 19) The full-color micro light-emitting diode device according to claim 19, wherein the reflective layer configured to refract blue light incident from the quantum dot layer and reflect the blue light back to the quantum dot layer and the reflective layer has high reflectivity and low transmittance to the blue light