# US 10,371,984 B2 · Color filter and display device including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,984 B2 - Document ID: US10371984B2 - Status: Granted - Kind: B2 - Application number: 15/690,594 - Filed: 2017-08-30 - Published: 2018-03-29 - Granted: 2019-08-06 - Earliest claimed: 2016-09-28 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Dokeun Song; Joonyong Park; Sangwon Shin; Dongmin Lee - Web page: https://patentgrep.com/patent/US10371984B2 ## CPC - G02F 1/133514: {Colour filters} - G02B 5/201: {in the form of arrays} - G02B 5/206: {comprising particles embedded in a solid matrix} - G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)} - G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light} - G02F 2202/36: Micro- or nanomaterials - 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 ## Abstract A color filter includes a substrate including a first surface having a first pixel area and a second pixel area spaced apart from each other and a light blocking area positioned between the first pixel area and the second pixel area. The light blocking area includes a trench. The color filter further includes a first color converter disposed on the first pixel area and configured to convert incident light to light of a first color, a second color converter disposed on the second pixel area and configured to convert the incident light to light of a second color, and a light blocker disposed in the trench. ## Claims ### Claim 1 A color filter comprising: a substrate comprising a first surface having a first pixel area and a second pixel area spaced apart from each other and a light blocking area positioned between the first pixel area and the second pixel area, wherein the light blocking area includes a trench, wherein the trench extends into the substrate; a first color converter disposed on the first pixel area and configured to convert incident light to light of a first color; a second color converter disposed on the second pixel area and configured to convert the incident light to light of a second color; and a light blocker disposed in the trench. ### Claim 2 (depends on 1) The color filter of claim 1, wherein the light blocker comprises a first surface, which is in contact with an inner wall of the trench and is convex, and a second surface, which faces the first surface and is concave. ### Claim 3 (depends on 1) The color filter of claim 1, wherein a depth of the trench is constant across a base of the trench. ### Claim 4 (depends on 1) The color filter of claim 1, wherein a width of the trench decreases from a side of the trench to a center of the trench. ### Claim 5 (depends on 1) The color filter of claim 1, wherein the light blocker comprises a first surface contacting an inner wall of the trench and a second surface, wherein the second surface is opposite to the first surface and is flat. ### Claim 6 (depends on 1) The color filter of claim 1, wherein the first color converter comprises a first color converting layer having first quantum dots that are excited by the incident light and emit the light of the first color, and the second color converter comprises a second color converting layer having second quantum dots that are excited by the incident light and emit the light of the second color. ### Claim 7 (depends on 6) The color filter of claim 6, further comprising a color filter layer disposed between the substrate and the first and second color converting layers, wherein the color filter layer is configured to reflect the incident light. ### Claim 8 (depends on 6) The color filter of claim 6, further comprising a band pass filter layer disposed on the first and second color converting layers and configured to selectively transmit the incident light therethrough and reflect the light of the first color and the light of the second color. ### Claim 9 (depends on 8) The color filter of claim 8, further comprising a light-blocking sidewall disposed on a portion of the band pass filter layer to surround at least portions of the first and second color converting layers. ### Claim 10 (depends on 8) The color filter of claim 8, wherein the first color converter further comprises a first light-blocking layer disposed between a sidewall of the first color converting layer and the band pass filter layer, and the second color converter further comprises a second light-blocking layer disposed between a sidewall of the second color converting layer and the band pass filter layer. ### Claim 11 (depends on 6) The color filter of claim 6, further comprising: a light-blocking sidewall configured to surround at least portions of the first and second color converting layers; and a band pass filter layer disposed on the first and second color converting layers and the light-blocking sidewall, wherein the band pass filter is configured to selectively transmit the incident light therethrough. ### Claim 12 (depends on 6) The color filter of claim 6, wherein the first color converter further comprises a first color filter layer disposed between the substrate and the first color converting layer, the first color filter layer configured to selectively transmit the light of the first color emitted from the first color converting layer therethrough, and the second color converter further comprises a second color filter layer disposed between the substrate and the second color converting layer, the second color filter layer configured to selectively transmit the light of the second color emitted from the second color converting layer therethrough. ### Claim 13 (depends on 1) The color filter of claim 1, further comprising a light transmitting layer disposed on a third pixel area spaced apart from the first and second pixel areas, the light transmitting layer configured to transmit the incident light therethrough. ### Claim 14 (depends on 1) The color filter of claim 1, further comprising a third color converter disposed on a third pixel area spaced apart from the first and second pixel areas, the third color converter configured to convert the incident light to light of a third color. ### Claim 15 (depends on 1) The color filter of claim 1, wherein the incident light is blue light or ultraviolet light, and the first color and the second color are red and green, respectively. ### Claim 16 A display apparatus comprising: a display comprising first and second pixels; and a color filter overlapping the display and comprising a first pixel area and a second pixel area, wherein the first pixel area and the second pixel area overlap the first pixel and the second pixel, respectively, wherein the color filter comprises: a substrate comprising a first surface having the first pixel area and the second pixel area spaced apart from each other and a light blocking area positioned between the first pixel area and the second pixel area, wherein a trench is provided in the light blocking area; a first color converter disposed on the first pixel area and configured to convert incident light to light of a first color; a second color converter disposed on the second pixel area and configured to convert the incident light to light of a second color; and a light blocker disposed in the trench. ### Claim 17 (depends on 16) The display apparatus of claim 16, wherein the light blocker comprises a first surface, which is in contact with an inner of the trench and is convex, and a second surface, which faces the first surface and is concave. ### Claim 18 (depends on 17) The display apparatus of claim 17, further comprising: a backlight device configured to irradiate the incident light toward the color filter; and a liquid crystal layer disposed between the first and second pixels and the color filter. ### Claim 19 (depends on 17) The display apparatus of claim 17, wherein each of the first and second pixels comprises an organic emission layer configured to emit the incident light. ### Claim 20 A color filter comprising: a substrate comprising a first pixel area and a second pixel area and a light blocking area positioned between the first and second pixel areas, wherein the light blocking area includes a recessed region; a first color converting layer including a first plurality of quantum dots and disposed on the first pixel area; a second color converting layer including a second plurality of quantum dots and disposed on the second pixel area; and a light blocker disposed in the recessed region, wherein the light blocker is partially overlapped by the first color converting layer and second color converting layer.