# US 11,309,508 B2 · Multi-functional optical composite board having quantum dots of high uniformity > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,508 B2 - Document ID: US11309508B2 - Status: Granted - Kind: B2 - Application number: 16/953,909 - Filed: 2020-11-20 - Published: 2021-05-27 - Granted: 2022-04-19 - Earliest claimed: 2019-11-21 - Assignees: Huizhou Kdz Photoelectric Technology Co., Ltd. - Applicants: Huizhou Kdz Photoelectric Technology Co., Ltd. - Inventors: Xingchao Zhuang - Web page: https://patentgrep.com/patent/US11309508B2 ## CPC - G02B 5/0294: {adapted to provide an additional optical effect, e.g. anti-reflection or filter} - H10K 50/115: comprising active inorganic nanostructures, e.g. luminescent quantum dots - G02B 5/0242: {by means of dispersed particles} - H10K 77/10: Substrates, e.g. flexible substrates - G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light} - H10K 59/38: comprising colour filters or colour changing media [CCM] - H10K 2102/331: {Nanoparticles used in non-emissive layers, e.g. in packaging layer} - Y02E 10/549: Organic PV cells - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A multi-functional optical composite board having quantum dots of high uniformity is provided herein, the multi-functional optical composite board comprises a diffusion base layer, a first quantum dot-containing layer disposed on the lower surface of the diffusion base layer, and a second quantum dot-containing layer disposed on the upper surface of the diffusion base layer, wherein the first quantum dot-containing layer comprises a red quantum dot-containing layer and a green quantum dot-containing layer, and the second quantum dot-containing layer is sequentially deposited on the upper surface of the diffusion base layer by coating repeatedly. The present invention improves the optical composite board from the structure, raw material and compositions thereof, and obtains a multi-functional optical composite board having a high light diffusion, a high uniformity of emitting-light, and the emitting-light of the resultant product appears much whiter and brighter. ## Claims ### Claim 1 A multi-functional optical composite board having quantum dots of high uniformity, comprising a diffusion base layer, a first quantum dot-containing layer disposed on the lower surface of the diffusion base layer, and a second quantum dot-containing layer disposed on the upper surface of the diffusion base layer, wherein: the diffusion base layer comprises Generral Polystyrene (GPPS) basal body, and functional additive particles uniformly distributed and blended in the GPPS basal body; the first quantum dot-containing layer comprises a red quantum dot-containing layer and a green quantum dot-containing layer, wherein, the red quantum dot-containing layer comprises a first viscose substrate, and red quantum dot particles uniformly distributed and blended in the first viscose substrate; the green quantum dot-containing layer comprises a second viscose substrate, and green quantum dot particles uniformly distributed and blended in the second viscose substrate; the red quantum dot-containing layer is uniformly coated on the lower surface of the diffusion layer by a coating process; and the green quantum dot-containing layer is uniformly coated on the lower surface of the red quantum dot-containing layer by a coating process; the second quantum dot-containing layer comprises a third viscose substrate and a plurality of different quantum-dot particles uniformly distributed and blended in the third viscose substrate, the different quantum-dot particles are a mixture consisting of red quantum dot particles and green quantum dot particles, the second quantum dot-containing layer is deposited on the upper surface of the diffusion base layer by coating repeatedly. ### Claim 2 (depends on 1) The multi-functional optical composite board having quantum dots of high uniformity according to claim 1, wherein: the GPPS basal body consists of GPPS as a main material, and the functional additive particles are a mixture of two or three or more compositions selected from a light diffusing agent, a grinding agent, a dispersant, an antioxidant, a lubricant, a filling agent, a heat-resistant additive or a rigid additive; wherein, the GPPS main material in the diffusion layer has a mass percentage of from 75% to 85%, and the functional additive particles has a mass percentage of from 15% to 25%. ### Claim 3 (depends on 2) The multi-functional optical composite board having quantum dots of high uniformity according to claim 2, wherein: the diffusion base layer is prepared by an extrusion molding process comprising: mixing the GPPS basal body and the functional additive particles in accordance with a preset mass percentage thereof, to obtain a uniform mixture feed; and extrusion molding the uniform mixture feed. ### Claim 4 (depends on 1) The multi-functional optical composite board having quantum dots of high uniformity according to claim 1, wherein: the red quantum dot particles are fluorescent nanoparticles made of a semiconductor material, the red quantum dot particles have an average size of from 2 to 6 nm, and the red quantum dot particles are selected from CdSe, CuInS2, CuInSe2 or any combinations thereof. ### Claim 5 (depends on 1) The multi-functional optical composite board having quantum dots of high uniformity according to claim 1, wherein: the green quantum dot particles are fluorescent nanoparticles made of a semiconductor material, the green quantum dot particles have an average size of from 2 to 6 nm, and the green quantum dot particles are selected from CdSe, CuInS2, CuInSe2 or any combinations thereof. ### Claim 6 (depends on 1) The multi-functional optical composite board having quantum dots of high uniformity according to claim 1, wherein: the red quantum dot particles and the green quantum dot particles are in a regular shape selected from spherical shape, dish and the like. ### Claim 7 (depends on 1) The multi-functional optical composite board having quantum dots of high uniformity according to claim 1, wherein: the first viscose substrate is a mixture of one or several selected from gradient 1 of a first glue, gradient of a second glue, vanish and n-Butyl acetate at a mass ratio of 44.5:2.94:50:15.2, and the first viscose substrate is coagulated and shaped by a heating cure or UV light cure; the second viscose substrate is a mixture of one or several selected from gradient 2 of the first glue, gradient of the second glue, vanish and n-butyl acetate at a mass ratio of 46.2:5.35:50:15.2, and the second viscose substrate is coagulated and shaped by a heating cure or UV light cure; the third viscose substrate is a mixture of one or several selected from gradient 1 of the first glue, gradient 2 of the first glue, gradient of the second glue, vanish and n-butyl acetate at a mass ratio of 44.5:46.2:8.29:100:30.4, and the third viscose substrate is coagulated and shaped by a heating cure or UV light cure. ### Claim 8 (depends on 4) The multi-functional optical composite board having quantum dots of high uniformity according to claim 4, wherein: the first viscose substrate is a mixture of one or several selected from gradient 1 of a first glue, gradient of a second glue, vanish and n-Butyl acetate at a mass ratio of 44.5:2.94:50:15.2, and the first viscose substrate is coagulated and shaped by a heating cure or UV light cure; the second viscose substrate is a mixture of one or several selected from gradient 2 of the first glue, gradient of the second glue, vanish and n-butyl acetate at a mass ratio of 46.2:5.35:50:15.2, and the second viscose substrate is coagulated and shaped by a heating cure or UV light cure; the third viscose substrate is a mixture of one or several selected from gradient 1 of the first glue, gradient 2 of the first glue, gradient of the second glue, vanish and n-butyl acetate at a mass ratio of 44.5:46.2:8.29:100:30.4, and the third viscose substrate is coagulated and shaped by a heating cure or UV light cure. ### Claim 9 (depends on 5) The multi-functional optical composite board having quantum dots of high uniformity according to claim 5, wherein: the first viscose substrate is a mixture of one or several selected from gradient 1 of a first glue, gradient of a second glue, vanish and n-Butyl acetate at a mass ratio of 44.5:2.94:50:15.2, and the first viscose substrate is coagulated and shaped by a heating cure or UV light cure; the second viscose substrate is a mixture of one or several selected from gradient 2 of the first glue, gradient of the second glue, vanish and n-butyl acetate at a mass ratio of 46.2:5.35:50:15.2, and the second viscose substrate is coagulated and shaped by a heating cure or UV light cure; the third viscose substrate is a mixture of one or several selected from gradient 1 of the first glue, gradient 2 of the first glue, gradient of the second glue, vanish and n-butyl acetate at a mass ratio of 44.5:46.2:8.29:100:30.4, and the third viscose substrate is coagulated and shaped by a heating cure or UV light cure. ### Claim 10 (depends on 6) The multi-functional optical composite board having quantum dots of high uniformity according to claim 6, wherein: the first viscose substrate is a mixture of one or several selected from gradient 1 of a first glue, gradient of a second glue, vanish and n-Butyl acetate at a mass ratio of 44.5:2.94:50:15.2, and the first viscose substrate is coagulated and shaped by a heating cure or UV light cure; the second viscose substrate is a mixture of one or several selected from gradient 2 of the first glue, gradient of the second glue, vanish and n-butyl acetate at a mass ratio of 46.2:5.35:50:15.2, and the second viscose substrate is coagulated and shaped by a heating cure or UV light cure; the third viscose substrate is a mixture of one or several selected from gradient 1 of the first glue, gradient 2 of the first glue, gradient of the second glue, vanish and n-butyl acetate at a mass ratio of 44.5:46.2:8.29:100:30.4, and the third viscose substrate is coagulated and shaped by a heating cure or UV light cure. ### Claim 11 (depends on 1) The multi-functional optical composite board having quantum dots of high uniformity according to claim 1, wherein the diffusion base layer has a thickness of from 0.5 to 1.5 mm, the first quantum dot-containing layer has a thickness of from 0.3 to 0.5 mm, and the second quantum dot-containing layer has a thickness of from 0.1 to 0.3 mm.