# US 9,753,324 B2 · Photoluminescent liquid crystal display > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,753,324 B2 - Document ID: US9753324B2 - Status: Granted - Kind: B2 - Application number: 14/822,114 - Filed: 2015-08-10 - Published: 2016-03-10 - Granted: 2017-09-05 - Earliest claimed: 2014-09-04 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Eun Joo Jang; Shin Ae Jun; Hyun A Kang - Web page: https://patentgrep.com/patent/US9753324B2 ## CPC - G02F 1/133514: {Colour filters} - G02F 1/133528: {Polarisers} - G02F 1/1336: {Illuminating devices} - G02F 1/133617: {Illumination with ultraviolet light; Luminescent elements or materials associated to the cell} - B32B 2457/20: Displays, e.g. liquid crystal displays, plasma displays - B32B 2457/202: LCD, i.e. liquid crystal displays - B32B 2457/206: Organic displays, e.g. OLED - C09K 2323/03: Viewing layer characterised by chemical composition - C09K 2323/031: Polarizer or dye - C09K 2323/06: Substrate layer characterised by chemical composition - G02B 5/30: Polarising elements (light-modulating devices with active elements G02F1/00) - G02B 5/3025: {Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state (G02B5/3008, G02B5/3016 take precedence)} - G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light} - G02F 2201/086: UV absorbing - H10D 48/383: {Quantum effect devices, e.g. of devices using quantum reflection, diffraction or interference effects} - H10D 62/813: {Quantum wire structures} - H10F 77/143: {comprising quantum structures} - H10F 77/1433: {Quantum dots} - H10F 77/1437: {Quantum wires or nanorods} - 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 - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION ## Abstract A photoluminescent liquid crystal display includes: a liquid crystal panel including a lower substrate, an upper substrate, a liquid crystal layer interposed between the upper and lower substrates, and a photoluminescent color filter layer disposed between the upper substrate and the liquid crystal layer; an optical device disposed on the upper substrate; a polarizing plate disposed under the lower substrate; and a backlight unit disposed under the polarizing plate and which emits blue light, where the photoluminescent color filter layer includes a first color filter which emits polarized red light, a second color filter which emits polarized green light, and a third color filter which emits polarized blue light, and the first color filter and the second color filter include a semiconductor nanocrystal-polymer composite. ## Claims ### Claim 1 A photoluminescent liquid crystal display, comprising: a liquid crystal panel comprising: a lower substrate; an upper substrate disposed opposite to the lower substrate; a liquid crystal layer interposed between the upper and lower substrates; and a photoluminescent color filter layer disposed between the upper substrate and the liquid crystal layer; a polarizing plate disposed under the lower substrate; and a backlight unit disposed under the polarizing plate and which emits blue light, wherein the photoluminescent color filter layer comprises: a first color filter which emits polarized red light based on the blue light, a second color filter which emits polarized green light based on the blue light, and a third color filter which emits polarized blue light based on the blue light, and each of the first color filter and the second color filter comprise a semiconductor nanocrystal-polymer composite. ### Claim 2 (depends on 1) The photoluminescent liquid crystal display of claim 1, further comprising: an optical device disposed on the upper substrate. ### Claim 3 (depends on 1) The photoluminescent liquid crystal display of claim 1, wherein the optical device maintains polarization of light emitted from the photoluminescent color filter layer, and the optical device comprises a polarizer or a refractive index-controlling coating having no polarization function. ### Claim 4 (depends on 1) The photoluminescent liquid crystal display of claim 1, wherein the semiconductor nanocrystal-polymer composite of the first color filter comprises a plurality of aligned quantum rods, an array composite, or a plurality of aligned quantum plates, wherein the array composite comprises a plurality of isotropic semiconductor nanocrystals and a plurality of longitudinally aligned metal nanowires, wherein the quantum rods, the isotropic semiconductor nanocrystals or the quantum plates in the first color filter emit red light, and the semiconductor nanocrystal-polymer composite of the second color filter comprises a plurality of aligned quantum rods, an array composite, or a plurality of aligned quantum plates wherein the array composite comprises a plurality of isotropic semiconductor nanocrystals; and a plurality of longitudinally aligned metal nanowires, wherein the quantum rods, the isotropic semiconductor nanocrystals or the quantum plates in the second color filter emit green light. ### Claim 5 (depends on 4) The photoluminescent liquid crystal display of claim 4, wherein the quantum rods of the semiconductor nanocrystal-polymer composite of the first or second color filter have an aspect ratio of greater than or equal to about 5. ### Claim 6 (depends on 4) The photoluminescent liquid crystal display of claim 4, wherein the metal nanowires of the semiconductor nanocrystal-polymer composite of the first or second color filter comprise a metal capable of showing a surface plasmon coupling. ### Claim 7 (depends on 6) The photoluminescent liquid crystal display of claim 6, wherein the metal capable of showing the surface plasmon coupling comprises gold, silver, copper, platinum, nickel or a combination thereof. ### Claim 8 (depends on 4) The photoluminescent liquid crystal display of claim 4, wherein the metal nanowires of the semiconductor nanocrystal-polymer composite of the first or second color filter have a diameter of less than or equal to about 200 nanometers and an aspect ratio of greater than or equal to about 10. ### Claim 9 (depends on 4) The photoluminescent liquid crystal display of claim 4, wherein the array composite comprising a plurality of isotropic semiconductor nanocrystals and a plurality of longitudinally aligned nanowires has a multi-layer structure comprising: a first layer comprising an array of the metal nanowires dispersed in a host matrix; and a second layer in contact with a surface of the first layer and comprising the isotropic semiconductor nanocrystals dispersed in a host matrix. ### Claim 10 (depends on 4) The photoluminescent liquid crystal display of claim 4, wherein the array composite comprising a plurality of isotropic semiconductor nanocrystals and a plurality of longitudinally aligned metal nanowires has a monolayer structure comprising an array of the longitudinally aligned metal nanowires and the isotropic semiconductor nanocrystals disposed in a host matrix. ### Claim 11 (depends on 9) The photoluminescent liquid crystal display of claim 9, wherein the host matrix of the first layer and the host matrix of the second layer are the same as or different from each other, and the host matrix of the first layer and the host matrix of the second layer comprise a transparent polymer. ### Claim 12 (depends on 1) The photoluminescent liquid crystal display of claim 1, wherein the third color filter comprises a transparent color filter which does not change a light spectrum of light incident thereto. ### Claim 13 (depends on 12) The photoluminescent liquid crystal display of claim 12, wherein the third color filter further comprises a plurality of aligned quantum rods. ### Claim 14 (depends on 12) The photoluminescent liquid crystal display of claim 12, wherein the third color filter further comprises a scatterer which maintains polarization of light incident thereto. ### Claim 15 (depends on 1) The photoluminescent liquid crystal display of claim 1, further comprising: a blue light blocking layer disposed on the first color filter and the second color filter. ### Claim 16 (depends on 1) The photoluminescent liquid crystal display of claim 1, wherein a semiconductor nanocrystal of the semiconductor nanocrystal-polymer composite has a core-shell structure. ### Claim 17 (depends on 1) The photoluminescent liquid crystal display of claim 1, wherein a semiconductor nanocrystal of the semiconductor nanocrystal-polymer composite comprises a Group II-VI compound, a Group III-V compound, a Group IV-VI compound, a Group IV compound, or a combination thereof.