# US 11,442,309 B2 · Display apparatus and method of 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 11,442,309 B2 - Document ID: US11442309B2 - Status: Granted - Kind: B2 - Application number: 17/110,380 - Filed: 2020-12-03 - Published: 2021-04-22 - Granted: 2022-09-13 - Earliest claimed: 2017-04-11 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Seon-Tae Yoon; Junghyun Kwon; Kisoo Park; Haeil Park; Moonjung Baek - Web page: https://patentgrep.com/patent/US11442309B2 ## CPC - G02F 1/133603: {with LEDs} - G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)} - G02F 1/133514: {Colour filters} - G02F 1/133528: {Polarisers} - G02F 1/133617: {Illumination with ultraviolet light; Luminescent elements or materials associated to the cell} - G02F 1/133548: {Wire-grid polarisers} - G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light} - 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 ## Abstract A display apparatus includes a backlight unit comprising a light source emitting blue light, a green color conversion material and a red color conversion material, a first polarizer disposed on the backlight unit, a first base substrate disposed on the first polarizer, a thin film transistor disposed on the first base substrate, a second polarizer disposed on the thin film transistor, a first color conversion pattern and a second color conversion pattern disposed on the second polarizer, a first color filter disposed on the first color conversion pattern, a second color filter disposed on the second color conversion pattern, a second base substrate disposed on the first and second color filters, and a third polarizer disposed on the second base substrate and having a polarizing axis same as a polarizing axis of the second polarizer. ## Claims ### Claim 1 A display apparatus, comprising: a light emitting diode including a first light emitting unit and a second light emitting unit; a first color conversion pattern and a second color conversion pattern over the light emitting diode; a first color filter over the first color conversion pattern; and a second color filter disposed over the second color conversion pattern, wherein the first light emitting unit emits light having a maximum peak wavelength of 455 nm or less, and wherein the second light emitting unit emits light having a wavelength greater than or equal to the maximum peak wavelength. ### Claim 2 (depends on 1) The display apparatus of claim 1, wherein the second light emitting unit is disposed over the first light emitting unit. ### Claim 3 (depends on 2) The display apparatus of claim 2, wherein light emitted from the first light emitting unit transmits the second light emitting unit. ### Claim 4 (depends on 1) The display apparatus of claim 1, wherein the light emitting diode emits light having a maximum peak wavelength of 455 nm or less. ### Claim 5 (depends on 1) The display apparatus of claim 1, wherein the first color filter is a red color filter, the second color filter is green color filter, and the first color conversion pattern comprises the red color conversion material and the second color conversion pattern comprises the green color conversion material. ### Claim 6 (depends on 5) The display apparatus of claim 5, wherein the red color conversion material is red quantum dot particles or red phosphor, and the green color conversion material is green quantum dot particles or green phosphor. ### Claim 7 (depends on 6) The display apparatus of claim 6, further comprising a third color conversion pattern over the light emitting diode and comprising scattering particles. ### Claim 8 (depends on 7) The display apparatus of claim 7, wherein the third color conversion pattern further comprises blue pigment. ### Claim 9 (depends on 7) The display apparatus of claim 7, further comprising a third color filter which is a blue color filter disposed on the third color conversion pattern. ### Claim 10 (depends on 7) The display apparatus of claim 7, further comprising: a black matrix disposed between the first color filter and the second color filter, wherein the black matrix is disposed between the first, second and third pixel areas to divide each of the first to third pixel areas, the first color filter and the first color conversion pattern overlap the first pixel area, the second color filter and the second color conversion pattern overlap the second pixel area, and the third color conversion pattern overlaps the third pixel area. ### Claim 11 (depends on 1) The display apparatus of claim 1, further comprising a scattering layer disposed under the first and second color conversion patterns and comprising scattering particles. ### Claim 12 (depends on 1) The display apparatus of claim 1, further comprising a second base substrate disposed on the first and second color filters. ### Claim 13 A display apparatus comprising first to third pixel areas, comprising: a light emitting diode including a first light emitting unit and a second light emitting unit; first to third pixel electrodes in the first to third pixel areas, respectively; first to third thin film transistors electrically connected to the first to third pixel electrodes, respectively; a first color conversion pattern over the light emitting diode in the first pixel area; a second color conversion pattern over the light emitting diode in the second pixel area; a first color filter disposed on the first color conversion pattern; and a second color filter disposed on the second color conversion pattern, wherein the first light emitting unit emits light having a maximum peak wavelength of 455 nm or less, and wherein the second light emitting unit emits light having a wavelength greater than or equal to the maximum peak wavelength. ### Claim 14 (depends on 13) The display apparatus of claim 13, wherein the second light emitting unit is disposed over the first light emitting unit. ### Claim 15 (depends on 14) The display apparatus of claim 14, wherein light emitted from the first light emitting unit transmits the second light emitting unit. ### Claim 16 (depends on 13) The display apparatus of claim 13, wherein the light emitting diode emits light having a maximum peak wavelength of 455 nm or less. ### Claim 17 (depends on 13) The display apparatus of claim 13, wherein the first color filter is a red color filter, the second color filter is a green color filter, the first color conversion pattern comprises red color conversion material, and the second color conversion pattern comprises green color conversion material, the red color conversion material is red quantum dot particles or red phosphor, and the green color conversion material is green quantum dot particles or green phosphor. ### Claim 18 (depends on 13) The display apparatus of claim 13, further comprising a third color conversion pattern over the light emitting diode in the third pixel area and comprising scattering particles and blue pigment. ### Claim 19 (depends on 13) The display apparatus of claim 13, further comprising a third color filter which is a blue color filter over the light emitting diode in the third pixel area. ### Claim 20 (depends on 13) The display apparatus of claim 13, further comprising: a second base substrate over the first and second color filters.