# US 11,310,906 B2 · Printed circuit board and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,906 B2 - Document ID: US11310906B2 - Status: Granted - Kind: B2 - Application number: 16/616,454 - Filed: 2019-07-03 - Published: 2022-02-24 - Granted: 2022-04-19 - Earliest claimed: 2019-04-29 - Assignees: TCL China Star Ovtoelectronics Technology Co., Ltd. - Applicants: TCL China Star Optoelectronics Technology Co., Ltd. - Inventors: Jianfeng Xiao - Web page: https://patentgrep.com/patent/US11310906B2 ## CPC - H05K 1/0218: {by printed shielding conductors, ground planes or power plane (H05K1/0236 takes precedence)} - H05K 1/0224: {Patterned shielding planes, ground planes or power planes (H05K1/0253 takes precedence)} - G02F 1/1345: Conductors connecting electrodes to cell terminals - G02F 1/1362: Active matrix addressed cells {(G02F1/134336, G02F1/134363 take precedence)} - H05K 1/189: characterised by the use of flexible or folded printed circuits - H05K 2201/09345: Power and ground in the same plane; Power planes for two voltages in one plane - H05K 2201/10136: Liquid Crystal display [LCD] - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract A printed circuit board and a display device are provided. A second wiring layer of the PCB includes a trace group, a system ground and an output pin group that includes power supply pins and a reference ground pin. One end of the power trace of the trace group is connected to one power supply pin, and another end of the power trace extends toward the system ground line. The insulating layer has a via hole corresponding to an overlapping portion of the power trace and the positive power supply signal line. The reference ground trace is disposed between the two power traces. The reference ground trace is between the reference ground pin and the system ground line. Voltage on the reference ground pin is stable to provide a stable power supply voltage. The ripple of the power supply voltage is reduced. The electromagnetic interference resistance is strong. ## Claims ### Claim 1 A printed circuit board comprising: a first wiring layer, comprising a positive power supply signal line; a second wiring layer disposed on the first wiring layer, comprising an output pin group, a system ground line spaced apart from the output pin group, and a trace group disposed between the output pin group and the system ground line; and an insulating layer disposed between the first wiring layer and the second wiring layer; wherein the output pin group comprises two power supply pins disposed apart from each other and a reference ground pin disposed between the two power supply pins, the trace group comprises two power traces disposed apart from each other and a reference ground trace; wherein one end of each of the power traces is connected to one power supply pin correspondingly, and another end of the each of the power traces extends toward the system ground line; wherein each of the power traces overlaps the positive power supply signal line, the insulating layer has a via hole corresponding to an overlapping portion of the each of the power traces and the positive power supply signal line, and each of the power traces is connected to the positive power supply signal line through the corresponding via hole; wherein the reference ground trace is disposed between the two power traces, one end of the reference ground trace being connected to the reference ground pin, and another end of the reference ground trace being connected to the system ground line. ### Claim 2 (depends on 1) The printed circuit board as claimed in claim 1, wherein a direction in which the output pin group is directed to the system ground line is defined as a first direction, and the two power supply pins are arranged in a direction perpendicular to the first direction. ### Claim 3 (depends on 2) The printed circuit board as claimed in claim 2, wherein both the system ground line and the positive power supply signal line are linear, an extending direction of the system ground line and an extending direction of the positive power supply signal line are both perpendicular to the first direction. ### Claim 4 (depends on 3) The printed circuit board as claimed in claim 3, wherein the trace group further comprises two capacitor traces respectively disposed between the another ends of the two power traces and the system ground line, each of the capacitor traces is connected to the another end of one power trace correspondingly. ### Claim 5 (depends on 4) The printed circuit board as claimed in claim 4, wherein both the two capacitor traces are linear, lines of the two capacitor traces align, the two capacitor traces are both parallel with the system ground line. ### Claim 6 (depends on 1) The printed circuit board as claimed in claim 1, wherein each of the power supply pins comprises a plurality of sub-power supply pins sequentially arranged along an arrangement direction of the two power supply pins and disposed apart from one another, the one end of each of the power traces is connected to the plurality of sub-power supply pins of the corresponding power supply pin, the reference ground pin comprises a plurality of sub-reference ground pins sequentially arranged along the arrangement direction of the two power supply pins and disposed apart from one another, the one end of the reference ground trace is connected to the plurality of sub-reference ground pins of the reference ground pin. ### Claim 7 (depends on 6) The printed circuit board as claimed in claim 6, wherein each of the power supply pins comprises two sub-power supply pins, the reference ground pin comprises two or four sub-reference ground pins. ### Claim 8 (depends on 1) The printed circuit board as claimed in claim 1, wherein the two power traces comprise a first power trace and a second power trace; the first power trace comprising a first line portion and a second line portion, one end of the first line portion being connected to the corresponding power supply pin, and another end of the first line portion extending toward the system ground line, one end of the second line portion being connected to the another end of the first line portion, and another end of the second line portion extending toward the system ground line, the first line portion being parallel with an arrangement direction of the output pin group and the system ground line, an angle between the second line portion and the first line portion being an acute angle, the second line portion and the positive power supply signal line overlapping, the insulating layer having a first via hole corresponding to an overlapping portion of the second line portion and the positive power supply signal line, the second line portion being connected to the positive power supply signal line through the first via hole; the second power trace comprising a third line portion, a fourth line portion, and a fifth line portion, one end of the third line portion being connected to the corresponding power supply pin, and another end of the third line portion extending toward the system ground line, one end of the fourth line portion being connected to the another end of the third line portion, and another end of the fourth line portion extending toward the system ground line, one end of the fifth line portion being connected to the another end of the fourth line portion, and another end of the fifth line portion extending toward the system ground line, the third line portion and the fifth line portion being both parallel with the arrangement direction of the output pin group and the system ground line, an angle between the fourth line portion and the third line portion being an acute angle, the fifth line portion and the positive power supply signal line overlapping, the insulating layer having a second via hole corresponding to an overlapping portion of the fifth line portion and the positive power supply signal line, the fifth line portion being connected to the positive power supply signal line through the second via hole. ### Claim 9 (depends on 8) The printed circuit board as claimed in claim 8, wherein the first power trace further comprises a sixth line portion, one end of the sixth line portion is connected to the another end of the second line portion, and another end of the sixth line portion extends toward the system ground line, the sixth line portion is-parallel with the arrangement direction of the output pin group and the system ground line. ### Claim 10 A display device comprising a printed circuit board, the printed circuit board comprising: a first wiring layer, comprising a positive power supply signal line; a second wiring layer disposed on the first wiring layer, comprising an output pin group, a system ground line spaced apart from the output pin group, and a trace group disposed between the output pin group and the system ground line; and an insulating layer disposed between the first wiring layer and the second wiring layer; wherein the output pin group comprises two power supply pins disposed apart from each other and a reference ground pin disposed between the two power supply pins, the trace group comprises two power traces disposed apart from each other and a reference ground trace; wherein one end of each of the power traces is connected to one power supply pin correspondingly, and another end of the each of the power traces extends toward the system ground line; wherein each of the power traces overlaps the positive power supply signal line, the insulating layer has a via hole corresponding to an overlapping portion of the each of the power traces and the positive power supply signal line, and each of the power traces is connected to the positive power supply signal line through the corresponding via hole; wherein the reference ground trace is disposed between the two power traces, one end of the reference ground trace being connected to the reference ground pin, and another end of the reference ground trace being connected to the system ground line. ### Claim 11 (depends on 10) The display device as claimed in claim 10, wherein a direction in which the output pin group is directed to the system ground line is defined as a first direction, and the two power supply pins are arranged in a direction perpendicular to the first direction. ### Claim 12 (depends on 11) The display device as claimed in claim 11, wherein both the system ground line and the positive power supply signal line are linear, an extending direction of the system ground line and an extending direction of the positive power supply signal line are both perpendicular to the first direction. ### Claim 13 (depends on 12) The display device as claimed in claim 12, wherein the trace group further comprises two capacitor traces respectively disposed between the another ends of the two power traces and the system ground line, each of the capacitor traces is connected to the another end of one power trace correspondingly. ### Claim 14 (depends on 13) The display device as claimed in claim 13, wherein both the two capacitor traces are linear, lines of the two capacitor traces align, the two capacitor traces are both parallel with the system ground line. ### Claim 15 (depends on 10) The display device as claimed in claim 10, wherein each of the power supply pins comprises a plurality of sub-power supply pins sequentially arranged along an arrangement direction of the two power supply pins and disposed apart from one another, the one end of each of the power traces is connected to the plurality of sub-power supply pins of the corresponding power supply pin, the reference ground pin comprises a plurality of sub-reference ground pins sequentially arranged along the arrangement direction of the two power supply pins and disposed apart from one another, the one end of the reference ground trace is connected to the plurality of sub-reference ground pins of the reference ground pin. ### Claim 16 (depends on 15) The display device as claimed in claim 15, wherein each of the power supply pins comprises two sub-power supply pins, the reference ground pin comprises two or four sub-reference ground pins. ### Claim 17 (depends on 10) The printed circuit board as claimed in claim 10, wherein the two power traces comprise a first power trace and a second power trace; the first power trace comprising a first line portion and a second line portion, one end of the first line portion being connected to the corresponding power supply pin, and another end of the first line portion extending toward the system ground line, one end of the second line portion being connected to the another end of the first line portion, and another end of the second line portion extending toward the system ground line, the first line portion being parallel with an arrangement direction of the output pin group and the system ground line, an angle between the second line portion and the first line portion being an acute angle, the second line portion and the positive power supply signal line overlapping, the insulating layer having a first via hole corresponding to an overlapping portion of the second line portion and the positive power supply signal line, the second line portion being connected to the positive power supply signal line through the first via hole; the second power trace comprising a third line portion, a fourth line portion, and a fifth line portion, one end of the third line portion being connected to the corresponding power supply pin, and another end of the third line portion extending toward the system ground line, one end of the fourth line portion being connected to the another end of the third line portion, and another end of the fourth line portion extending toward the system ground line, one end of the fifth line portion being connected to the another end of the fourth line portion, and another end of the fifth line portion extending toward the system ground line, the third line portion and the fifth line portion being both parallel with the arrangement direction of the output pin group and the system ground line, an angle between the fourth line portion and the third line portion being an acute angle, the fifth line portion and the positive power supply signal line overlapping, the insulating layer having a second via hole corresponding to an overlapping portion of the fifth line portion and the positive power supply signal line, the fifth line portion being connected to the positive power supply signal line through the second via hole. ### Claim 18 (depends on 17) The printed circuit board as claimed in claim 17, wherein the first power trace further comprises a sixth line portion, one end of the sixth line portion is connected to the another end of the second line portion, and another end of the sixth line portion extends toward the system ground line, the sixth line portion is-parallel with the arrangement direction of the output pin group and the system ground line.