# US 12,218,179 B2 · Display device having light blocking part in non-display area and tiled 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 12,218,179 B2 - Document ID: US12218179B2 - Status: Granted - Kind: B2 - Application number: 17/701,207 - Filed: 2022-03-22 - Published: 2023-01-26 - Granted: 2025-02-04 - Earliest claimed: 2021-07-26 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Hyun Hyang Kim; Jeong Weon Seo; Min Gwan Hyun - Web page: https://patentgrep.com/patent/US12218179B2 ## CPC - H10H 29/142: {Two-dimensional arrangements, e.g. asymmetric LED layout} - H10W 90/00: Package configurations - H10H 20/851: Wavelength conversion means - H10H 20/855: Optical field-shaping means, e.g. lenses - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A display device including: a substrate having a display area and a non-display area extending around the display area, the display area having emission areas and a light blocking area; a thin film transistor layer on the substrate and including thin film transistors; a light emitting element layer on the thin film transistor layer and including light emitting elements; a wavelength conversion layer on the light emitting element layer to convert a peak wavelength of light provided from at least some of the light emitting elements; and a color filter layer on the wavelength conversion layer. The color filter layer includes: color filters in each of the emission areas; a first light blocking part in the light blocking area; and a second light blocking part in the non-display area. ## Claims ### Claim 1 A display device comprising: a substrate having a display area and a non-display area extending around the display area, the display area having emission areas and a light blocking area; a thin film transistor layer on the substrate and comprising thin film transistors; a light emitting element layer on the thin film transistor layer and comprising light emitting elements; a wavelength conversion layer on the light emitting element layer to convert a peak wavelength of light provided from at least some of the light emitting elements; and a color filter layer on the wavelength conversion layer, the color filter layer comprising: color filters in each of the emission areas; a first light blocking part in the light blocking area; and a second light blocking part in the non-display area. ### Claim 2 (depends on 1) The display device of claim 1, wherein a height of the second light blocking part is greater than or equal to a height of the first light blocking part and less than or equal to a height of the color filters. ### Claim 3 (depends on 1) The display device of claim 1, wherein the non-display area has a pattern area at where the second light blocking part is arranged and an open area excluding the pattern area, and wherein an area ratio of the pattern area to the open area is in a range of 1.5 to 3:1. ### Claim 4 (depends on 1) The display device of claim 1, wherein the second light blocking part has a closed loop shape extending around the display area. ### Claim 5 (depends on 1) The display device of claim 1, wherein the second light blocking part has a circular shape, an elliptical shape, a semicircular shape, or a polygonal shape. ### Claim 6 (depends on 1) The display device of claim 1, wherein the second light blocking part comprises a material that blocks visible light and transmits infrared light. ### Claim 7 (depends on 1) The display device of claim 1, wherein the color filter layer further comprises a plurality of the second light blocking parts, and wherein a width of one of the second light blocking parts at an outermost part of the non-display area is smaller than a width of another one of the second light blocking parts. ### Claim 8 (depends on 1) The display device of claim 1, wherein the emission areas has first to third emission areas emitting different colors, and wherein the wavelength conversion layer comprises: a first wavelength conversion part in the first emission area to convert a peak wavelength of light incident from the light emitting elements into a first peak wavelength; a second wavelength conversion part in the second emission area to convert a peak wavelength of light incident from the light emitting elements into a second peak wavelength different from the first peak wavelength; and a light transmission part in the third emission area to transmit the light incident from the light emitting elements. ### Claim 9 (depends on 8) The display device of claim 8, wherein the color filters comprise: a first color filter on the first wavelength conversion part; a second color filter on the second wavelength conversion part; and a third color filter on the light transmission part, and wherein the first light blocking part is on the wavelength conversion layer and has a grid shape extending around the first to third color filters. ### Claim 10 (depends on 9) The display device of claim 9, wherein the color filter layer further comprises a plurality of the first light blocking parts, and wherein one of the first light blocking parts at an outermost part from among the first light blocking parts surrounds a side surface of the wavelength conversion layer. ### Claim 11 (depends on 9) The display device of claim 9, wherein the second light blocking part is on the light emitting element layer and surrounds a side surface of the wavelength conversion layer to be spaced apart therefrom. ### Claim 12 A tiled display device comprising: display devices each having a display area and a coupling area between the display areas, each of the display areas having emission areas and a light blocking area; and a bonding member bonding the display devices in the coupling area, wherein each of the display devices comprises: a substrate; a thin film transistor layer on the substrate and comprising thin film transistors; a light emitting element layer on the thin film transistor layer and comprising light emitting elements; a wavelength conversion layer on the light emitting element layer to convert a peak wavelength of light provided from at least some of the light emitting elements; and a color filter layer on the wavelength conversion layer, the color filter layer comprising: color filters in each of the emission areas; a first light blocking part in the light blocking area; and a second light blocking part in the coupling area. ### Claim 13 (depends on 12) The tiled display device of claim 12, wherein a height of the second light blocking part is greater than or equal to a height of the first light blocking part and less than or equal to a height of the color filters. ### Claim 14 (depends on 12) The tiled display device of claim 12, wherein the coupling area has a pattern area at where the second light blocking part is arranged and an open area excluding the pattern area, and wherein an area ratio of the pattern area to the open area is in a range of 1.5 to 3:1. ### Claim 15 (depends on 12) The tiled display device of claim 12, wherein the second light blocking part has a closed loop shape extending around the display area. ### Claim 16 (depends on 12) The tiled display device of claim 12, wherein the second light blocking part has a circular shape, an elliptical shape, a semicircular shape, or a polygonal shape. ### Claim 17 (depends on 12) The tiled display device of claim 12, wherein the second light blocking part comprises a material that blocks visible light and transmits infrared light. ### Claim 18 (depends on 12) The tiled display device of claim 12, wherein the bonding member is configured to bond side surfaces of the substrates, side surfaces of the thin film transistor layers, side surfaces of the light emitting element layers, and side surfaces of the second light blocking parts of the display devices. ### Claim 19 (depends on 12) The tiled display device of claim 12, wherein each of the display devices further comprises: an encapsulation layer on the color filter layer; and an anti-reflection layer on the encapsulation layer to prevent reflection of external light. ### Claim 20 (depends on 19) The tiled display device of claim 19, further comprising a cover member covering the anti-reflection layer of each of the display devices and a top surface of the bonding member.