# US 12,113,923 B2 · Rear glass touch sensor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,923 B2 - Document ID: US12113923B2 - Status: Granted - Kind: B2 - Application number: 17/419,872 - Filed: 2019-12-26 - Published: 2022-03-24 - Granted: 2024-10-08 - Earliest claimed: 2019-01-03 - Assignees: Dongwoo Fine-Chem Co., Ltd. - Applicants: Dongwoo Fine-Chem Co., Ltd. - Inventors: Jongmin Kim; Dong Pil Park; Jaehyun Lee - Web page: https://patentgrep.com/patent/US12113923B2 ## CPC - H04M 1/0283: {for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate} - G06F 3/04164: {Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads} - G06F 3/041661: {using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window} - G06F 3/044: by capacitive means - G06V 40/1306: {non-optical, e.g. ultrasonic or capacitive sensing} - H04M 1/0277: {for a printed circuit board assembly} - G06F 2203/04107: Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds - H04M 2250/22: including a touch pad, a touch sensor or a touch detector - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract A touch sensor includes a sensing cell part having a plurality of sensing cells, a wiring part having a plurality of wires for transmitting a sensing signal of the sensing cell part, and a pad electrode part having a plurality of pad electrodes for transmitting the sensing signal received from the wiring part to an flexible printed circuits board (FPCB), and is coupled to a rear glass of a portable terminal. ## Claims ### Claim 1 A touch sensor comprising: a sensing cell part having a general touch area and a dummy area located in a device area including a camera within the general touch area, wherein the dummy area is formed of a same material as the general touch area; a wiring part having a plurality of wires for transmitting a sensing signal of the sensing cell part; and a pad electrode part having a plurality of pad electrodes for transmitting the sensing signal received from the wiring part to an FPCB (flexible printed circuit board), wherein the touch sensor is coupled to a rear glass of a portable terminal and the rear glass is a rear-most layer of the portable terminal with no element beneath. ### Claim 2 (depends on 1) The touch sensor according to claim 1, wherein the sensing cell part includes a high resolution touch area for a fingerprint touch, a low resolution touch area for a touch other than the fingerprint touch, or both. ### Claim 3 (depends on 2) The touch sensor according to claim 2, wherein the sensing cell part is formed of a conductive metal. ### Claim 4 (depends on 2) The touch sensor according to claim 2, wherein the sensing cell part includes a curved sensing cell part coupled to a curved extension part extended in a curved shape on a side of the rear glass, and the curved sensing cell part includes the high resolution touch area, the low resolution touch area, or both. ### Claim 5 (depends on 4) The touch sensor according to claim 4, wherein the low resolution touch area of the curved sensing cell part detects signal of volume control, power on/off, or both. ### Claim 6 A portable terminal comprising: a rear glass that is a rear-most layer of the portable terminal with no element beneath; a decorative film layer coupled to the rear glass; a touch sensor coupled to the decorative film layer and including a sensing cell part having a general touch area and a dummy area located in a device area including a camera within the general touch area, wherein the dummy area is formed of the same material as the general touch area, a wiring part having a plurality of wires for transmitting a sensing signal of the sensing cell part, and a pad electrode part having a plurality of pad electrodes for transmitting the sensing signal received from the wiring part to an FPCB (flexible printed circuit board); the FPCB coupled to the pad electrode part of the touch sensor; and a connection part having one side connected to the FPCB and the other side penetrating or bypassing a rear case of the portable terminal to connect to a PCB (printed circuit board) of the portable terminal. ### Claim 7 (depends on 6) The portable terminal according to claim 6, wherein the touch sensor is formed on the decorative film layer with a transfer method. ### Claim 8 (depends on 6) The portable terminal according to claim 6, further comprising an adhesive layer between the decorative film layer and the touch sensor. ### Claim 9 (depends on 6) The portable terminal according to claim 6, further comprising a signal interference blocking layer between the touch sensor and a main PCB (printed circuit board) or a battery. ### Claim 10 (depends on 9) The portable terminal according to claim 9, wherein the signal interference blocking layer is formed of a conductive metal having a sheet resistance of 0.1 Ω/sq or less. ### Claim 11 (depends on 9) The portable terminal according to claim 9, further comprising a cushion tape between the touch sensor and the signal interference blocking layer. ### Claim 12 (depends on 6) The portable terminal according to claim 6, wherein the sensing cell part is formed of a conductive metal. ### Claim 13 (depends on 6) The portable terminal according to claim 6, wherein a thickness including the rear glass and the decorative film is 100 to 500 μm. ### Claim 14 (depends on 13) The portable terminal according to claim 13, further comprising an adhesive layer between the decorative film layer and the touch sensor. ### Claim 15 (depends on 3) The touch sensor according to claim 3, wherein the sensing cell part includes a curved sensing cell part coupled to a curved extension part extended in a curved shape on a side of the rear glass, and the curved sensing cell part includes the high resolution touch area, the low resolution touch area, or both. ### Claim 16 (depends on 15) The touch sensor according to claim 15, wherein the low resolution touch area of the curved sensing cell part detects signal of volume control, power on/off, or both.