# US 10,503,015 B2 · Light-modulated quantum dot color display and method for manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,503,015 B2 - Document ID: US10503015B2 - Status: Granted - Kind: B2 - Application number: 15/977,628 - Filed: 2018-05-11 - Published: 2019-03-14 - Granted: 2019-12-10 - Earliest claimed: 2017-09-11 - Assignees: Seoul National University R&Db Foundation - Applicants: Seoul National University R&Db Foundation - Inventors: Sin-Doo Lee; Se-Um Kim; Jeng-Hun Suh - Web page: https://patentgrep.com/patent/US10503015B2 ## CPC - G02F 1/133621: {providing coloured light (G02F1/133617, G02F1/133533 take precedence)} - G02B 26/08: for controlling the direction of light (in light guides G02B6/35) - G02F 1/133514: {Colour filters} - G02F 1/133617: {Illumination with ultraviolet light; Luminescent elements or materials associated to the cell} - G02F 1/1337: Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers - B82Y 20/00: Nanooptics, e.g. quantum optics or photonic crystals - G02F 1/01791: {Quantum boxes or quantum dots} - G02F 1/133738: {for homogeneous alignment} - G02F 1/133742: {for homeotropic alignment} - G02F 2202/022: polymeric - G02F 2202/36: Micro- or nanomaterials - G02F 2203/34: Colour display without the use of colour mosaic filters - 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 - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES ## Abstract A light-modulated quantum dot (QD) color display according to an embodiment of the present disclosure includes a light source, a light modulator positioned above the light source to control the intensity of light generated from the light source, and a QD light-emitting element positioned above the light modulator and including a plurality of QD patterns having different emission properties in the visible light region by means of light intensity that has passed through the light modulator. According to an embodiment, the QD pattern is configured to accomplish light emission with uniformity and high color purity by uniform distribution of QDs in a matrix using aligned polymer, thereby simultaneously achieving the features of uniform emission of light over the entire pixel, intensity-tunability giving analog grey levels, and high color purity and wide color gamut without using a color filter beyond the limitation of existing QD color display technology. ## Claims ### Claim 1 A light-modulated quantum dot (QD) color display, comprising: a light source; a light modulator positioned above the light source to control transmittance of light generated from the light source; and a QD light-emitting element positioned above the light modulator to emit light by the transmitted light, wherein the QD light-emitting element further includes: a substrate; an alignment layer on the substrate; and a plurality of matrix QD patterns on the alignment layer that is disposed between the substrate and the plurality of matrix QD patterns, each of the plurality of matrix QD patterns including a plurality of QDs and a matrix of a plurality of aligned polymers that are aligned along a same alignment direction due to the alignment layer, wherein the matrix of the plurality of aligned polymers uniformly distributes the plurality of QDs within the matrix QD pattern. ### Claim 2 (depends on 1) The light-modulated QD color display according to claim 1, wherein the plurality of matrix QD patterns has different emission properties. ### Claim 3 (depends on 1) The light-modulated QD color display according to claim 1, wherein at least two of the plurality of matrix QD patterns have different values of the thickness of the QD patterns or different sizes and materials of QDs therein. ### Claim 4 (depends on 1) The light-modulated QD color display according to claim 1, wherein the alignment direction of the plurality of aligned polymers is set to a direction that is between vertical and horizontal to the plane of the substrate. ### Claim 5 (depends on 1) The light-modulated QD color display according to claim 1, wherein the matrix of the plurality of aligned polymers is made of reactive mesogen or photoalignment material. ### Claim 6 (depends on 1) The light-modulated QD color display according to claim 1, wherein each of the plurality of QD patterns has a cross section of a closed shape in geometry, forming a polygon or a curve and a straight line when viewed along a direction perpendicular to the plane of the substrate. ### Claim 7 (depends on 1) The light-modulated QD color display according to claim 1, wherein the light source has a wavelength range that is used for the photo-excitation of QDs to emit light. ### Claim 8 (depends on 1) The light-modulated QD color display according to claim 1, wherein the light modulator controls transmittance of light generated from the light source for each pixel. ### Claim 9 (depends on 1) The light-modulated QD color display according to claim 1, wherein the light modulator is made of a liquid crystal. ### Claim 10 A method for manufacturing a light-modulated quantum dot (QD) color display, comprising: forming an alignment layer on an outer surface or an inner surface of a substrate; forming a plurality of matrix QD patterns having different emission properties on the alignment layer, each of the plurality of matrix QD patterns including a plurality of QDs and a matrix of a plurality of aligned polymers that are aligned along a same alignment direction due to the alignment layer, wherein the matrix of the plurality of aligned polymers uniformly distributes the plurality of QDs within the matrix QD pattern; placing the substrate with the plurality of matrix QD patterns above a light modulator; and placing the light modulator with the substrate above a light source. ### Claim 11 (depends on 10) The method for manufacturing the light-modulated QD color display according to claim 10, wherein at least two of the plurality of matrix QD patterns have different values of the thickness of the QD patterns or different sizes and materials of QDs. ### Claim 12 (depends on 10) The method for manufacturing the light-modulated QD color display according to claim 10, wherein the alignment direction of the matrix of the plurality of aligned polymers is set to a direction that is between vertical and horizontal to the plane of the substrate. ### Claim 13 (depends on 10) The method for manufacturing the light-modulated QD color display according to claim 10, wherein the matrix of the plurality of aligned polymers is reactive mesogen or photoalignment material. ### Claim 14 (depends on 10) The method for manufacturing the light-modulated QD color display according to claim 10, wherein each of the plurality of matrix QD patterns has a cross section of a closed a closed shape in geometry, forming a polygon or a curve and a straight line when viewed along a direction perpendicular to the plane of the substrate. ### Claim 15 A quantum dot (QD) light emitting panel, comprising: a plurality of matrix QD patterns having different emission properties, each of the plurality of matrix QD patterns including a plurality of QDs and a matrix of a plurality of aligned polymers that are aligned along a same alignment direction, wherein the matrix of the plurality of aligned polymers uniformly distributes the plurality of QDs within the matrix QD such that the plurality of matrix QD patterns has uniform light emission. ### Claim 16 (depends on 15) The QD light emitting panel according to claim 15, wherein the matrix of the plurality of aligned polymers is made of reactive mesogen or photoalignment material. ### Claim 17 (depends on 15) The QD light emitting panel according to claim 15, wherein at least two of the plurality of QD patterns have different values of the thickness of the QD patterns or different sizes and materials of QDs therein. ### Claim 18 (depends on 15) The QD light emitting panel according to claim 15, wherein the light emission from the plurality of QD patterns is electro-luminescence upon the application of an external voltage, or photo-luminescence upon photo-energy transfer from a light source.