# US 2013/0155037 A1 · Organic light emitting display device having test pad > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0155037 A1 - Document ID: US20130155037A1 - Status: Published application - Kind: A1 - Application number: 13/619,801 - Filed: 2012-09-14 - Published: 2013-06-20 - Earliest claimed: 2011-12-20 - Inventors: Na-Young Kim; Keum-Nam Kim - Web page: https://patentgrep.com/patent/US20130155037A1 ## CPC - G09G 3/3225: using an active matrix - 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)} - 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) ## Abstract Disclosed is a light emitting display device which includes test pads for respective pixels to efficiently inspect an open or short of a circuit, that is, a short-circuiting or a breaking of wire. ## Claims ### Claim 1 An organic light emitting display device comprising: a substrate; a display unit on the substrate and comprising a plurality of pixels; a driver for providing a drive signal to the display unit; a plurality of signal lines for transferring the drive signal to the display unit; and a plurality of test pads electrically coupled to the signal lines, wherein the signal lines extend from the driver and branch out to a plurality of branch lines, which are respectively coupled to the pixels of the display unit, and wherein the test pads are electrically coupled to the branch lines respectively. ### Claim 2 (depends on 1) The organic light emitting display device as claimed in claim 1, wherein the display unit comprises a first electrode, a light emitting layer on the first electrode, and a second electrode on the light emitting layer. ### Claim 3 (depends on 1) The organic light emitting display device as claimed in claim 1, wherein the driver comprises at least one of a scan driver or a data driver. ### Claim 4 (depends on 1) The organic light emitting display device as claimed in claim 1, wherein the driver comprises a scan driver, and the signal lines comprise scan lines. ### Claim 5 (depends on 1) The organic light emitting display device as claimed in claim 1, wherein the pixels include a red pixel, a green pixel, and a blue pixel. ### Claim 6 (depends on 5) The organic light emitting display device as claimed in claim 5, wherein the branch lines are coupled to the red pixel, the green pixel, and the blue pixel, respectively, and the test pads are coupled to the branch lines respectively. ### Claim 7 (depends on 1) The organic light emitting display device as claimed in claim 1, wherein the test pads are configured to inspect an open or short of a circuit. ### Claim 8 (depends on 1) The organic light emitting display device as claimed in claim 1, wherein the signal lines and the branch lines comprise different materials. ### Claim 9 (depends on 1) The organic light emitting display device as claimed in claim 1, further comprising an option pad coupled to the signal lines. ### Claim 10 (depends on 1) The organic light emitting display device as claimed in claim 1, further comprising an option pad coupled in parallel to the test pads. ### Claim 11 A method of manufacturing an organic light emitting display device, the method comprising: forming a display unit comprising a plurality of pixels on a substrate; forming a driver spaced apart from the display unit; forming signal lines coupling the display unit to the driver; and forming test pads electrically coupled to the signal lines, wherein the forming of the signal lines comprises forming a plurality of branch lines branched out from one signal line extended from the driver such that the plurality of branch lines are respectively coupled to pixels of the display unit, and the forming of the test pads or the forming of the branch lines comprises respectively coupling the test pads to the branch lines. ### Claim 12 (depends on 11) The method as claimed in claim 11, wherein the forming of the display unit comprises forming a first electrode, forming a light emitting layer on the first electrode, and forming a second electrode on the light emitting layer. ### Claim 13 (depends on 11) The method as claimed in claim 11, wherein the forming of the driver comprises at least one of forming a scan driver or forming a data driver. ### Claim 14 (depends on 11) The method as claimed in claim 11, wherein the driver comprises a scan driver, and the signal lines comprise scan lines. ### Claim 15 (depends on 11) The method as claimed in claim 11, wherein the forming of the display unit comprises forming a red pixel, forming a green pixel, and forming a blue pixel. ### Claim 16 (depends on 15) The method as claimed in claim 15, wherein the red pixel, the green pixel, and the blue pixel are coupled to the branch lines, respectively, and the test pads are coupled to the branch lines, respectively. ### Claim 17 (depends on 11) The method as claimed in claim 11, wherein the test pads are configured to inspect an open or short of a circuit. ### Claim 18 (depends on 11) The method as claimed in claim 11, wherein the signal lines and the branch lines are formed of different materials. ### Claim 19 (depends on 11) The method as claimed in claim 11, further comprising forming an option pad coupled to the signal lines. ### Claim 20 (depends on 11) The method as claimed in claim 11, further comprising forming an option pad coupled in parallel to the test pads. ### Claim 21 An organic light emitting display device comprising: a substrate; a display unit on the substrate and comprising a red pixel, a green pixel, and a blue pixel; a scan driver for providing a scan signal to the display unit; a plurality of scan lines for transferring the scan signal to the display unit; branch lines branched from a scan line of the plurality of scan lines, and coupled to the red pixel, the green pixel, and the blue pixel, respectively; and test pads electrically coupled to the branch lines.