# US 11,122,675 B2 · Printed circuit board including overvoltage controlling element and electronic 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 11,122,675 B2 - Document ID: US11122675B2 - Status: Granted - Kind: B2 - Application number: 17/008,348 - Filed: 2020-08-31 - Published: 2020-12-17 - Granted: 2021-09-14 - Earliest claimed: 2018-08-09 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Hyunjun Park; Hongkook Lee; Dongkyoon Han - Web page: https://patentgrep.com/patent/US11122675B2 ## CPC - H05K 1/0213: {Electrical arrangements not otherwise provided for} - H05K 1/0257: {Overvoltage protection} - G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED] - H05K 1/0277: {Bendability or stretchability details (H05K1/038, H05K3/4691 take precedence)} - H05K 1/115: {Via connections; Lands around holes or via connections (H05K1/112 takes precedence)} - H05K 1/181: associated with surface mounted components - G09G 2300/0408: Integration of the drivers onto the display substrate - G09G 2330/04: Display protection - H02H 9/041: {using a short-circuiting device} - H02H 9/042: {comprising means to limit the absorbed power or indicate damaged over-voltage protection device} - H02H 9/046: {responsive to excess voltage appearing at terminals of integrated circuits} - H05K 1/147: {at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit (H05K1/148 takes precedence)} - H05K 3/429: {Plated through-holes specially for multilayer circuits, e.g. having connections to inner circuit layers} - H05K 2201/0746: Protection against transients, e.g. layout adapted for plugging of connector - H05K 2201/0979: Redundant conductors or connections, i.e. more than one current path between two points - H05K 2201/10015: Non-printed capacitor - H05K 2201/10128: Display - H05K 2201/10174: Diode - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H) ## Abstract Disclosed is a printed circuit board including an overvoltage controlling element and an electronic device including the same. The printed circuit board includes a first outer layer, a second outer layer, at least one inner layer stacked between the first and second outer layers, an overvoltage controlling element comprising overvoltage controlling circuitry mounted on the first outer layer and including a plurality of terminals of which a first terminal is connected to a ground, and a conductive area configured to transfer at least a part of a first voltage applied from an external power source to an external IC and to transfer a remaining part of the first voltage to the overvoltage controlling element. ## Claims ### Claim 1 An electronic device including a flexible printed circuit board comprising: a first outer circuit layer; a second outer circuit layer; an inner circuit layer stacked between the first and second outer circuit layers; and an overvoltage controlling element comprising overvoltage controlling circuitry mounted on the first outer circuit layer and including an input terminal and an output terminal connected to a ground; wherein the flexible printed circuit board connects a printed circuit board and a display panel of the electronic device, wherein the input terminal and the output terminal are electrically connected on the first outer circuit layer, and wherein a first portion of the inner circuit layer for an external power source of the printed circuit board is connected to the input terminal via at least one bridge, and a second portion of the inner circuit layer for a display IC of the display panel is connected to the output terminal via at least one bridge, and wherein the first portion and the second portion are only connected through the input terminal and the output terminal on the first outer circuit layer. ### Claim 2 (depends on 1) The printed circuit board of claim 1, further comprising a first conductive via formed between an external power source and the first outer circuit layer. ### Claim 3 (depends on 2) The printed circuit board of claim 2, further including a third portion arranged on the first outer circuit layer, a fourth portion arranged on the at least one inner circuit layer, and a second conductive via configured to electrically connect the third portion and the fourth portion. ### Claim 4 (depends on 3) The printed circuit board of claim 3, wherein the second conductive via is formed between an overvoltage controlling element and the display IC. ### Claim 5 (depends on 3) The printed circuit board of claim 3, wherein the at least one inner circuit layer on which the fourth portion is arranged protrudes toward the display IC. ### Claim 6 (depends on 1) The printed circuit board of claim 1, further comprising an overvoltage controlling element including at least one of a transient voltage suppression (TVS) diode or a decoupling capacitor. ### Claim 7 (depends on 1) The printed circuit board of claim 1, wherein the at least one inner circuit layer has a thickness in a specified range, which is less than a thickness of the first outer circuit layer or a thickness of the second outer circuit layer. ### Claim 8 (depends on 1) The printed circuit board of claim 1, wherein the at least one inner circuit layer has a width in a specified range which is greater than a width of the first outer circuit layer or a width of the second outer circuit layer. least one inner layer has a width in a specified range which is greater than a width of the first outer layer or a width of the second outer layer.