# US 12,016,116 B2 · Display device and an inspection method of a display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,016,116 B2 - Document ID: US12016116B2 - Status: Granted - Kind: B2 - Application number: 18/208,923 - Filed: 2023-06-13 - Published: 2023-10-12 - Granted: 2024-06-18 - Earliest claimed: 2019-11-20 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Yong Jin Shin; Kyun Ho Kim; Uk Jae Jang; Bong Im Park - Web page: https://patentgrep.com/patent/US12016116B2 ## CPC - H05K 1/0268: {for electrical inspection or testing} - G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels} - G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)} - H05K 1/117: {Pads along the edge of rigid circuit boards, e.g. for pluggable connectors} - H05K 1/14: Structural association of two or more printed circuits (providing electric connection to or between printed circuits H05K1/11, H01R12/00) - 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 1/18: structurally associated with non-printed electric components (H05K1/16 takes precedence) - H05K 3/361: {Assembling flexible printed circuits with other printed circuits} - H10W 70/65: Shapes or dispositions of interconnections - G09G 2300/0408: Integration of the drivers onto the display substrate - G09G 2300/0426: Layout of electrodes and connections - G09G 2330/12: Test circuits or failure detection circuits included in a display system, as permanent part thereof - H05K 2201/049: PCB for one component, e.g. for mounting onto mother PCB - H05K 2201/10128: Display - H10W 70/688: {Flexible insulating substrates} - 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 - 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) - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A display device including: a display panel; a first substrate attached to a side of the display panel; and a second substrate attached to a side of the first substrate, wherein the display panel includes a first panel test pad and a second panel test pad, the first substrate includes a 1-1 circuit test lead overlapping and connected to the first panel test pad, a 1-2 circuit test lead overlapping and connected to the second panel test pad, a 2-1 circuit test lead overlapping and connected to the second substrate, a 1-1 test lead line connected to the 1-1 circuit test lead, a 1-2 test lead line connected to the 1-2 circuit test lead, and a first test lead line connected to the 2-1 circuit test lead, and the 1-1 test lead line and the 1-2 test lead line are connected to the first test lead line. ## Claims ### Claim 1 A display device comprising: a display panel; a first substrate attached to a side of the display panel; and a second substrate attached to a first side of the first substrate, and wherein: the first substrate includes a first test lead, a second test lead, a third test lead, and a fourth test lead disposed on a second side of the first substrate which is opposite to the first side of the first substrate; the first substrate further includes a fifth test lead, a sixth test lead, a seventh test lead, and an eighth test lead disposed on the first side of the first substrate; the first test lead and the second test lead are electrically connected to the fifth test lead; and the third test lead is connected to the sixth test lead, and the fourth test lead is electrically connected to the seventh test lead and the eighth test lead. ### Claim 2 (depends on 1) The display device of claim 1, wherein the first substrate further includes a 1-1 test lead line connected to the first test lead, a 1-2 test lead line connected to the second test lead, and a first test lead line connected to the fifth circuit test lead, and wherein the 1-1 test lead line and the 1-2 test lead line are connected to each other and are connected to the first test lead line. ### Claim 3 (depends on 1) The display device of claim 1, wherein the first substrate further includes a second test lead line is connected to the third test lead and the sixth test lead. ### Claim 4 (depends on 1) The display device of claim 1, wherein the first substrate further includes a third test lead line is connected to the fourth test lead, a 3-1 test lead line connected to the seventh test lead, and a 3-2 test lead line connected to the eighth test lead, and wherein the 3-1 test lead line and the 3-2 test lead line are connected to each other and are connected to the third test lead line. ### Claim 5 (depends on 1) The display device of claim 1, wherein the first substrate further includes a first lead line disposed on the second side of the first substrate, a second line disposed on the first side of the first substrate, and a driving integrated circuit electrically connected to the first lead line and the second lead line. ### Claim 6 (depends on 5) The display device of claim 5, wherein the first substrate further includes a first signal line connected to the first lead line and the driving integrated circuit and a second signal line connected to the second lead line and the driving integrated circuit. ### Claim 7 (depends on 5) The display device of claim 5, wherein the second substrate includes a main circuit pad electrically connected to the second lead line and a main circuit part electrically connected to the main circuit pad. ### Claim 8 (depends on 7) The display device of claim 7, wherein the second substrate further includes a third signal line connected to the main circuit pad and the main circuit part. ### Claim 9 (depends on 1) The display device of claim 1, wherein the second substrate includes a first main test pad electrically connected to the fifth test lead, a second main test pad electrically connected to the sixth test lead, a third main test pad electrically connected to the seventh test lead, and a fourth main test pad electrically connected to the eighth test lead. ### Claim 10 (depends on 9) The display device of claim 9, wherein the second substrate further includes a first test point electrically connected to the first main test pad, a second test point electrically connected to the second main test pad, and a third test point electrically connected to the third main test pad and the fourth main test pad. ### Claim 11 (depends on 10) The display device of claim 10, wherein the second substrate further includes a 1-1 main test line connected to the first main test pad, a 1-2 main test line connected to the second main test pad, a first main test line connected to the first test point, and wherein the 1-1 main test line and the 1-2 main test line are connected to each other and are connected to the first main test line. ### Claim 12 (depends on 1) The display device of claim 1, wherein the display panel includes a first panel test pad electrically connected to the first test lead, a second panel test pad electrically connected to the second test lead, a third panel test pad electrically connected to the third test lead, and a fourth panel test pad electrically connected to the fourth test lead. ### Claim 13 (depends on 12) The display device of claim 12, wherein the display panel further includes a first panel test line connected to the first panel test pad, a second panel test line connected to the second panel test pad, a third panel test line connected to the third panel test pad, and a fourth panel test line connected to the fourth panel test pad. ### Claim 14 (depends on 13) The display device of claim 13, wherein the first panel test line, the second panel test line, the third panel test line, and the fourth panel test line are connected to each other. ### Claim 15 (depends on 12) The display device of claim 12, wherein the display panel further includes a panel pad and a fourth signal line connected to the panel pad. ### Claim 16 (depends on 15) The display device of claim 15, wherein the display panel further includes a driving integrated circuit connected to the fourth signal line. ### Claim 17 (depends on 1) The display device of claim 1, wherein the first substrate further includes a first power lead line disposed on the second side of the first substrate, a second power lead line disposed on the first side of the first substrate, and a first power signal line connected to the first power lead line and the second power lead line. ### Claim 18 (depends on 17) The display device of claim 17, wherein the second substrate further includes a power main circuit pad electrically connected to the second power lead line, and a power driving part electrically connected to the power main circuit pad. ### Claim 19 (depends on 17) The display device of claim 17, wherein the display panel further includes a power panel pad electrically connected to the first power lead line. ### Claim 20 A display device comprising: a display panel; and a first substrate attached to a side of the display panel, and wherein: the display panel includes a first panel test pad, a second panel test pad, a third panel test pad, and a fourth panel test pad; the first substrate includes a first main test pad electrically connected to the first panel test pad, a second main test pad electrically connected to the second panel test pad, a third main test pad electrically connected to the third panel test pad, a fourth main test pad electrically connected to the fourth panel test pad; and the first substrate further includes a first test point electrically connected to the first main test pad, a second test point electrically connected to the second main test pad, and a third test point electrically connected to the third main test pad and the fourth main test pad.