# US 10,121,838 B2 · Flat panel display connecting front side to rear side of substrate using through hole > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,121,838 B2 - Document ID: US10121838B2 - Status: Granted - Kind: B2 - Application number: 15/701,847 - Filed: 2017-09-12 - Published: 2018-04-26 - Granted: 2018-11-06 - Earliest claimed: 2016-10-25 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: Jongsik Shim; Youngjun Choi; Younsub Kim - Web page: https://patentgrep.com/patent/US10121838B2 ## CPC - H10K 59/123: Connection of the pixel electrodes to the thin film transistors [TFT] - H10K 59/127: comprising two substrates, e.g. display comprising OLED array and TFT driving circuitry on different substrates - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 59/1275: {Electrical connections of the two substrates} - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H10K 59/38: comprising colour filters or colour changing media [CCM] - H10K 77/10: Substrates, e.g. flexible substrates - Y02E 10/549: Organic PV cells - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The present disclosure relates to a display device including a light emitting element display. The present disclosure suggests a flat panel display comprising: a substrate; a driving element disposed on a first surface of the substrate; an organic light emitting diode disposed on a second surface of the substrate; a through-hole penetrating the substrate from the front surface to the rear surface; and a connecting electrode filling the through-hole for linking the driving element to the organic light emitting diode. ## Claims ### Claim 1 A display device, comprising: a substrate; a driver element disposed on a first surface of the substrate; a light emitting element disposed on a second surface of the substrate; a through-hole penetrating the substrate from the first surface to the second surface; and a connecting electrode filling the through-hole for linking the driving element to the light emitting element, wherein the light emitting element is organic light emitting diode, the organic light emitting diode includes: an anode electrode disposed in a matrix manner on the first surface; a bank covering circumference areas of the anode electrode; an organic light emitting layer on the anode electrode exposed by the bank; and a cathode electrode disposed on the organic light emitting layer, wherein the through-hole and the connecting electrode are disposed as overlapping with the bank, and wherein the bank is disposed as fully covering the through-hole and the connecting electrode. ### Claim 2 (depends on 1) The display device according to the claim 1, wherein the driving element includes: a scan line running to a first direction on the second surface; a data line and a current driving line running to a second direction on the second surface; a switching thin film transistor connecting between the scan line and the data line; and a driving thin film transistor connecting between the switching thin film transistor and the current driving line, and wherein the driving thin film transistor connects to the connecting electrode. ### Claim 3 (depends on 1) The display device according to the claim 1, further comprising: an en-cap joined to the first surface of the substrate; a plurality of an auxiliary line disposed on the en-cap as facing to the bank; and a color filter disposed between two neighboring auxiliary lines, wherein the auxiliary lines contact the cathode electrode. ### Claim 4 (depends on 1) The display device according to the claim 1, wherein the through-hole and the connecting electrode comprise a plurality of through holes and connecting electrodes, and the plurality of the through-hole and the connecting electrode is disposed along the bank. ### Claim 5 (depends on 1) The display device according to the claim 1, wherein the through-hole and the connecting electrode comprise a plurality of through holes and connecting electrodes, and the plurality of the through-hole and the connecting electrode are disposed overlapping the bank along one side of a vertical circumference of the anode electrode. ### Claim 6 (depends on 1) The display device according to the claim 1, wherein the through-hole and the connecting electrode comprise a plurality of through holes and connecting electrodes, and the plurality of the through-hole and the connecting electrode are disposed overlapping the bank along one side of a horizontal circumference of the anode electrode. ### Claim 7 (depends on 1) The display device according to the claim 1, wherein the through-hole includes: a first hole disposed on the first surface; and a second hole disposed on the second surface, wherein the first hole has the same size of the second hole. ### Claim 8 (depends on 1) The display device according to the claim 1, wherein the through-hole includes: a first hole disposed on the first surface; and a second hole disposed on the second surface, wherein the first hole is larger than the second hole. ### Claim 9 (depends on 1) The display device according to the claim 1, wherein the through-hole includes: a first hole disposed on the first surface; and a second hole disposed on the second surface, wherein the first hole is smaller than the second hole. ### Claim 10 (depends on 1) The display device according to claim 1, wherein at least a part of the through-hole overlaps a bank of the light emitting element. ### Claim 11 (depends on 1) The display device according to claim 1, wherein the connecting electrode filling the through-hole have bumped portions extruded upward and downward from the first surface and the second surface, respectively. ### Claim 12 (depends on 3) The display device according to the claim 3, wherein the auxiliary line is directly disposed on and contact the cathode, without other layers interposed therebetween.