# US 2023/0056594 A1 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0056594 A1 - Document ID: US20230056594A1 - Status: Published application - Kind: A1 - Application number: 17/888,964 - Filed: 2022-08-16 - Published: 2023-02-23 - Earliest claimed: 2021-08-17 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Youngsub Shin; ChaeKyung Lim; DaeHeung Lee; YoungHoon Kim; Jungmin Yoon - Web page: https://patentgrep.com/patent/US20230056594A1 ## CPC - H10K 59/38: comprising colour filters or colour changing media [CCM] - G02B 5/201: {in the form of arrays} - G02B 5/206: {comprising particles embedded in a solid matrix} - H10K 50/844: Encapsulations - H10K 50/865: {comprising light absorbing layers, e.g. light-blocking layers} - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 59/40: OLEDs integrated with touch screens - H10K 59/873: {Encapsulations} - H10K 59/8792: {comprising light absorbing layers, e.g. black layers} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A display device includes a black matrix that is substantially entirely exposed by openings in a color filter in an active area, making it possible to suppress occurrence of diffuse reflection in the color filter. ## Claims ### Claim 1 A display device, comprising: an active area; an encapsulation layer; a black matrix positioned on the encapsulation layer; a color filter positioned on the encapsulation layer; and an adhesive layer positioned on the black matrix and the color filter; wherein in a top view facing the black matrix from the adhesive layer, the black matrix is substantially entirely exposed by openings in the color filter in the active area. ### Claim 2 (depends on 1) The display device of claim 1, wherein color filter patterns of the color filter have angles between respective upper surfaces and respective sidewalls thereof, the angles being greater than or equal to 90 degrees, the upper surfaces facing the adhesive layer. ### Claim 3 (depends on 1) The display device of claim 1, wherein the color filter is in direct contact with the adhesive layer. ### Claim 4 (depends on 1) The display device of claim 1, wherein the adhesive layer has a transmittance that varies according to wavelength in a visible light range. ### Claim 5 (depends on 1) The display device of claim 1, further comprising an overcoat layer positioned between the black matrix and the adhesive layer. ### Claim 6 (depends on 5) The display device of claim 5, wherein the overcoat layer has a transmittance that varies according to wavelength in a visible light range. ### Claim 7 (depends on 1) The display device of claim 1, wherein the black matrix includes a first layer and a second layer, wherein the first layer includes black nanoparticles, and the second layer includes white nanoparticles. ### Claim 8 (depends on 1) The display device of claim 1, wherein the color filter includes a first color filter pattern, a second color filter pattern, and a third color filter pattern, wherein the first color filter pattern, the second color filter pattern, the third color filter pattern, and the black matrix have substantially a same thickness. ### Claim 9 (depends on 1) The display device of claim 1, wherein the black matrix and the adhesive layer are in direct contact with each other. ### Claim 10 (depends on 1) The display device of claim 1, wherein the color filter includes a first color filter pattern and a second color filter pattern, wherein the first color filter pattern has substantially a same thickness as the black matrix. ### Claim 11 (depends on 1) The display device of claim 1, wherein the color filter includes a first color filter pattern and a second color filter pattern, wherein a thickness of the second color filter pattern is greater than a thickness of the black matrix. ### Claim 12 (depends on 1) The display device of claim 1, wherein the active area includes an opening portion and a non-opening portion, wherein the black matrix is positioned in the non-opening portion and positioned to be spaced apart from the opening portion. ### Claim 13 (depends on 1) The display device of claim 1, wherein a thickness of the black matrix is greater than a thickness of the color filter. ### Claim 14 (depends on 1) The display device of claim 1, wherein the black matrix is positioned on the color filter. ### Claim 15 A display device, comprising: a substrate; a light emitting element on the substrate; an encapsulation layer on the light emitting element; a color filter on the encapsulation layer, the color filter including color filter patterns, the color filter patterns having sidewalls that are equally distant or increasingly distant from each other with increased proximity to the substrate; a black matrix laterally surrounding the color filter and laterally separated from the light emitting element by a distance; and an adhesive layer on the color filter and the black matrix. ### Claim 16 (depends on 15) The display device of claim 15, further comprising: a bank layer laterally surrounding the light emitting element; wherein a first opening of the bank layer in which the light emitting element is positioned is smaller than a second opening of the black matrix in which the color filter is positioned. ### Claim 17 (depends on 15) The display device of claim 15, wherein the black matrix vertically overlaps interfaces between neighboring pairs of the color filter patterns. ### Claim 18 A display device, comprising: a light emitting element; a bank layer laterally surrounding the light emitting element; an encapsulation layer on the light emitting element; a color filter on the encapsulation layer, the color filter including color filter patterns, the color filter patterns having: respective lower surfaces facing the encapsulation layer; and respective upper surfaces facing away from the encapsulation layer; wherein the upper surfaces are smaller than the lower surfaces; a black matrix disposed in openings of the color filter; and an adhesive layer on the color filter and the black matrix. ### Claim 19 (depends on 18) The display device of claim 18, further comprising a touch-on-encapsulation (TOE) between the encapsulation layer and the color filter. ### Claim 20 (depends on 18) The display device of claim 18, further comprising an overcoat layer in the openings of the color filter.