# US 12,008,180 B2 · Display device including a fingerprint sensor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,008,180 B2 - Document ID: US12008180B2 - Status: Granted - Kind: B2 - Application number: 17/819,944 - Filed: 2022-08-15 - Published: 2023-06-15 - Granted: 2024-06-11 - Earliest claimed: 2021-12-13 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Su Yul Seo; Ji Hun Ryu; Kwang Hyun Baek; Kyung Min Choi; Won Ki Hong; Jeong An Hong - Web page: https://patentgrep.com/patent/US12008180B2 ## CPC - G06F 3/0412: {Digitisers structurally integrated in a display} - G06V 40/1306: {non-optical, e.g. ultrasonic or capacitive sensing} - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract A display device includes a display panel. A metal plate is disposed on a bottom surface of the display panel and includes a first surface facing the bottom surface of the display panel and a second surface opposite to the one surface. A fingerprint sensor overlaps the second surface of the metal plate. The metal plate includes a recess that is recessed in a direction from the second surface of the metal plate toward the first surface. ## Claims ### Claim 1 A display device, comprising: a display panel; a metal plate disposed on a bottom surface of the display panel, the metal plate saving a first surface facing the bottom surface of the display panel, a second surface facing away from the display panel, and a recess disposed on the second surface of the metal plate; a fingerprint sensor disposed on the second surface of the metal plate, overlapping the recess of the metal plate; and a filling disposed between the metal plate and the fingerprint sensor, wherein the metal plate and the filling include different materials from each other and the filling fills a volume of the recess. ### Claim 2 (depends on 1) The display device of claim 1, wherein the filling includes acrylonitrile butadiene styrene copolymer (ABS) and/or polycarbonate (PC). ### Claim 3 (depends on 1) The display device of claim 1, further comprising a coupling disposed between the fingerprint sensor and the filling and configured to couple the fingerprint sensor and the filling to each other. ### Claim 4 (depends on 3) The display device of claim 3, wherein a hardness of the filling is greater than a hardness of the coupling. ### Claim 5 (depends on 4) The display device of claim 4, wherein the hardness of the filling is 10 times greater than the hardness of the coupling. ### Claim 6 (depends on 5) The display device of claim 5, wherein the hardness of the filling is 0.8 GPa or more. ### Claim 7 (depends on 1) The display device of claim 1, wherein a thickness of the recess is 20% to 60% of a maximum thickness of the metal plate. ### Claim 8 (depends on 1) The display device of claim 1, wherwin a width of the fingerprint sensor is greater than a width of the recess. ### Claim 9 (depends on 8) The display device of claim 8, wherein the fingerprint sensor additionally overlaps a portion of the metal plate that is not overlapped by the recess. ### Claim 10 The display device of claim1, wherein a width of the fingerprint sensor is smaller than a width of the recess. ### Claim 11 (depends on 1) The display device of claim 1, wherein the filling additionally overlaps a portion of the metal plate that is not overlapped by the recess. ### Claim 12 (depends on 1) The display device of claim 1, wherein the filling comprises a first portion and a second portion disposed between the first portion and the metal plate and a hardness of the second portion is greater than a hardness of the first portion. ### Claim 13 (depends on 1) The display device of claim 1, wherein the fingerprint sensor comprises an ultrasonic fingerprint sensor and the ultrasonic fingerprint sensor is configured to perform fingerprint recognition by comparing an incident ultrasonic wave incident upward from the ultrasonic fingerprint sensor and a fingerprint reflected ultrasonic wave reflected from a fingerprint. ### Claim 14 (depends on 1) The display device of claim 1, wherein the fingerprint sensor comprises an optical fingerprint sensor and the filling has a transmittance of about 90% for visible light, ultraviolet light, or infrared light. ### Claim 15 (depends on 1) The display device of claim 1, wherein a roughness of the second surface of the metal plate in which the recess is formed is greater than a roughness of the first surface of the metal plate in which the recess is not formed. ### Claim 16 A display device, comprising: a display panel; a metal plate disposed on a bottom surface of the display panel and comprising a top surface facing the bottom surface of the display panel and a bottom surface opposite to the top surface; and a fingerprint sensor disposed on the bottom surface of the metal plate, wherein the metal plate comprises a recess recessed in a direction from the bottom surface of the metal plate in a direction toward the top surface of the metal plate, wherein the fingerprint sensor overlaps the recess, wherein a roughness of the bottom surface of the metal plate where the recess is formed is greater than a roughness of the bottom surface of the metal plate where the recess is not formed, and wherein a folding area and a non-folding area in a periphery of the folding area are defined in the display panel and the fingerprint sensor overlaps the non-folding area. ### Claim 17 (depends on 16) The display device of claim 16, further comprising: a filling disposed between the metal plate and the fingerprint sensor; and a coupling disposed between the fingerprint sensor and the filling and configured to couple the fingerprint sensor and the filling to one another. ### Claim 18 (depends on 17) The display device of claim 17, wherein a hardness of the filling is greater than a hardness of the coupling. ### Claim 19 (depends on 16) The display device of claim 16, wherein a width of the fingerprint sensor is smaller than a width of the recess. ### Claim 20 (depends on 17) The display device of claim 17, wherein the filling comprises a first portion and a second portion disposed between the first portion and the metal plate, and a hardness of the second portion is greater than a hardness of the first portion.