US2023089997A1PendingUtilityA1

Light emitting display device and method of fabricating the same

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Assignee: LG DISPLAY CO LTDPriority: Oct 17, 2019Filed: Nov 30, 2022Published: Mar 23, 2023
Est. expiryOct 17, 2039(~13.2 yrs left)· nominal 20-yr term from priority
Inventors:Sojung LeeJongsung KimSeungkyeom KimSumin Lee
H10K 59/878H10K 59/80518H10K 59/80515H10K 50/856H10K 59/122H10K 59/124H10K 2102/3026H10K 59/1201H10K 59/40H10K 50/818H01L 51/5271H01L 2227/323H01L 2251/5315H01L 27/323H01L 27/3246H01L 51/5218H10K 71/60H10K 71/00H10K 59/805H10K 59/88H10K 59/875H10K 59/873H10K 59/12H10K 71/621H10K 71/231H10K 59/1213H10K 59/35H10K 50/813
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Claims

Abstract

A light emitting display device can include a substrate including an emission area and a non-emission area, a thin film transistor on the substrate, a first overcoating layer on the thin film transistor, an organic light emitting diode on the first overcoating layer and connected to the thin film transistor, an encapsulation unit on the organic light emitting diode, and a touch unit on the encapsulation unit. The touch unit can include an open area defined by a plurality of touch electrodes. The organic light emitting diode can include a first electrode, an emission layer and a second electrode. Further, a portion of the first electrode and a portion of a side mirror-shaped dummy first electrode separated from the first electrode can be disposed in the open area defined by the plurality of touch electrodes.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A light emitting display device, comprising:
 a substrate including an emission area and a non-emission area;   a thin film transistor on the substrate;   a first overcoating layer on the thin film transistor;   an organic light emitting diode on the first overcoating layer and connected to the thin film transistor;   an encapsulation unit on the organic light emitting diode; and   a touch unit on the encapsulation unit,   wherein the touch unit includes an open area defined by a plurality of touch electrodes,   wherein the organic light emitting diode includes a first electrode, an emission layer and a second electrode, and   wherein a portion of the first electrode and a portion of a side mirror-shaped dummy first electrode separated from the first electrode are disposed in the open area defined by the plurality of touch electrodes.   
     
     
         2 . The light emitting display device according to  claim 1 , further comprising:
 a connection electrode electrically connected with a drain electrode of the thin film transistor, and disposed under the first electrode of the organic light emitting diode.   
     
     
         3 . The light emitting display device according to  claim 2 , further comprising:
 a second overcoating layer on the first overcoating layer, and covering an end portion of the connection electrode.   
     
     
         4 . The light emitting display device according to  claim 3 , further comprising:
 a sacrificial layer disposed between the second overcoating layer and the connection electrode, and directly covering the end portion of the connection electrode.   
     
     
         5 . The light emitting display device according to  claim 4 , wherein the sacrificial layer includes an opening, and the first electrode is disposed in the opening of the sacrificial layer. 
     
     
         6 . The light emitting display device according to  claim 3 , wherein the side mirror-shaped dummy first electrode is disposed on a side surface and a portion of a top surface of the second overcoating layer. 
     
     
         7 . The light emitting display device according to  claim 6 , further comprising:
 a bank layer on the side mirror-shaped dummy first electrode.   
     
     
         8 . The light emitting display device according to  claim 7 , wherein a portion of the bank layer is disposed between the first electrode and the side mirror-shaped dummy first electrode. 
     
     
         9 . The light emitting display device according to  claim 7 , wherein the bank layer contacts with the second overcoating layer in the open area defined by the plurality of touch electrodes. 
     
     
         10 . The light emitting display device according to  claim 1 , wherein the touch unit includes:
 a first insulating layer on the encapsulation unit,   a second inorganic insulating layer on the first insulating layer,   a touch line on the first insulating layer, and   at least one of the plurality of touch electrodes on the second insulating layer or the touch line.   
     
     
         11 . The light emitting display device according to  claim 1 , wherein the plurality of touch electrodes are formed in a mesh structure. 
     
     
         12 . The light emitting display device according to  claim 1 , wherein the first electrode is disposed in the emission area, and the side-mirror shaped dummy first electrode is disposed in the non-emission area of the open area. 
     
     
         13 . A light emitting display device, comprising:
 a plurality of sub-pixels on a substrate, one of the plurality of sub-pixels being divided into an emission area and a non-emission area,   wherein the one of the plurality of sub-pixels includes:
 a thin film transistor in the emission area, 
 an organic light emitting diode connected to the thin film transistor an, and disposed in the emission area, and 
 an encapsulation unit on the organic light emitting diode; 
   a side mirror-shaped dummy electrode disposed between layers of the organic light emitting diodes, and disposed in the non-emission area; and   a touch unit on the encapsulation unit and including a plurality of touch electrodes,   wherein a portion of the plurality of touch electrodes is disposed in the non-emission area.   
     
     
         14 . The light emitting display device according to  claim 13 , wherein the non-emission area completely surrounds the emission area. 
     
     
         15 . The light emitting display device according to  claim 13 , wherein the plurality of touch electrodes are disposed in a mesh configuration that defines the plurality of sub-pixels. 
     
     
         16 . The light emitting display device according to  claim 13 , wherein another portion of the plurality of touch electrodes is disposed in the emission area. 
     
     
         17 . The light emitting display device according to  claim 13 , further comprising:
 a connection electrode between an electrode of the organic light emitting diode and the thin film transistor, and disposed in the emission area.   
     
     
         18 . The light emitting display device according to  claim 17 , further comprising:
 a sacrificial layer overlapping an end portion of the connection electrode.   
     
     
         19 . The light emitting display device according to  claim 18 , further comprising:
 an overcoating layer between the sacrificial layer and the side mirror-shaped dummy electrode, and disposed in the non-emission area.   
     
     
         20 . The light emitting display device according to  claim 19 , further comprising:
 a bank layer between the side mirror-shaped dummy electrode and the encapsulation unit, and defining the emission area.

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