Display device having a connection area outside the display area

Abstract

An object of the present invention is to provide a display device capable of narrowing the area of the frame. In order to achieve this object, the display device according to the present invention has a substrate having a plurality of arranged display elements and a wiring layer of a power source on the peripheral side; a bank layer for mutually separating the display elements; an electrode layer for covering the plurality of display elements and the bank layer; and a sealing substrate for further covering the electrode layer by joining the peripheral portion of the substrate and the sealing portion circling around the periphery via a joining element such as an adhesive; wherein the periphery of the sealing substrate is positioned inside the periphery of the substrate, and the peripheral portion of the electrode layer is connected to the wiring of the power source within the sealing portion.

What is claimed is: 
     
       1. A display device, comprising:
 a substrate including a plurality of display elements, a bank layer that separates each of the display elements, and a wiring layer;   a common electrode layer that is spread out to the periphery of the substrate and covers said plurality of display elements and said bank layer; and   a multilayer thin film for covering the substrate,   wherein a flat peripheral portion of the common electrode layer is laminated to a flat top face of the wiring layer through laminated flat conductive films which form a linear electrical connection area in plane, and the connection area is continuously positioned outside of the bank layer along sides of the substrate where a wiring tape is not connected, and the multilayer thin film extends beyond the connection area of the common electrode layer and the wiring layer.   
     
     
       2. The display device according to  claim 1 , wherein at least one thin film among the multilayer thin film has gas barrier properties or anti-environmental properties. 
     
     
       3. The display device according to  claim 1 , wherein the substrate is a square substrate, and the common electrode layer and the wiring layer are connected at one side of the substrate by laminating the common electrode layer and the wiring layer together using the laminated flat conductive films. 
     
     
       4. The display device according to  claim 1 , wherein the substrate is a square substrate, and the common electrode layer and the wiring layer are connected at two sides of the substrate by laminating the common electrode layer and the wiring layer together using the laminated flat conductive films. 
     
     
       5. The display device according to  claim 1 , wherein the substrate is a square substrate, and the common electrode layer and the wiring layer are connected at three sides of the substrate by laminating the common electrode layer and the wiring layer together using the laminated flat conductive films. 
     
     
       6. The display device according to  claim 1 , wherein the multilayer thin film includes an inorganic layer. 
     
     
       7. The display device according to  claim 6 , wherein the inorganic layer is made of a material selected from SiO 2 , SiN and SiON. 
     
     
       8. The display device according to  claim 1 , wherein the multilayer thin film includes an organic layer. 
     
     
       9. The display device according to  claim 8 , wherein the organic layer includes fluoric macromolecules. 
     
     
       10. The display device according to  claim 8 , wherein the organic layer is made of a material selected from polyethylene, polystyrene and polypropylene. 
     
     
       11. The display device according to  claim 1 , wherein the multilayer thin film is formed by laminating an organic layer/inorganic layer/organic layer. 
     
     
       12. The display device according to  claim 1 , wherein the multilayer thin film is formed by laminating an inorganic layer/organic layer/inorganic layer. 
     
     
       13. A manufacturing method of a display device, comprising:
 a step of forming at least a wiring layer at a part of the periphery of a substrate to which an electrical circuit is to be formed;   a step of forming an element separation layer comprising a plurality of grooves for mutually separating a plurality of display elements excluding an area over the wiring layer of the substrate;   a step of forming said display elements to each of the plurality of grooves of the element separation layer;   a step of forming a common electrode layer on the plurality of display elements, the element separation layer, and the wiring layer, respectively; and   a sealing step of directly forming a multilayer thin film above the common electrode layer and the substrate;   wherein a flat peripheral portion of the common electrode layer is laminated to a flat top face of the wiring layer through laminated flat conductive films which form a linear electrical connection area in plane; and the connection area is continuously positioned outside of the element separation layer along sides of the substrate where a wiring tape is not connected, and the multilayer thin film extends beyond the connection area.   
     
     
       14. A display device, comprising:
 a substrate that has a first side and a second side opposite to the first side constituting an outline of the substrate;   a transistor disposed above a first plane of the substrate;   an insulating film disposed so as to cover the transistor;   a plurality of first electrodes disposed above the insulating film;   a second electrode arranged above the plurality of first electrodes;   a light-emitting layer arranged between at least one of the plurality of first electrodes and the second electrode;   a first conductive film disposed between the second electrode and the first plane, the first conductive film being electrically connected to the second electrode; and   a second conductive film disposed between the first conductive film and the first plane, the second conductive film being electrically connected to the first conductive film,   the first conductive film being disposed between the first side and the plurality of first electrodes,   the first conductive film having a first edge positioned between the first side and the plurality of first electrodes and a second edge positioned between the first edge and the first side in a first cross-section of the display device, the first cross section intersecting with the first side, the second side and the first conductive film,   the first conductive film having a second plane and a third plane, the second plane being disposed between the first plane and the third plane, the second plane being in contact with the second conductive film at the second edge.    
     
     
       15. The display device as set forth in claim 14,
 the first conductive film being formed in a first layer in which the plurality of first electrodes are formed.    
     
     
       16. The display device as set forth in claim 14,
 the first conductive film containing a first material contained in the plurality of first electrodes.    
     
     
       17. The display device as set forth in claim 14,
 the second conductive film being formed in a second layer in which a source electrode or a drain electrode of the transistor is formed.    
     
     
       18. The display device as set forth in claim 14,
 the second conductive film containing a second material contained in a source electrode or a drain electrode of the transistor.    
     
     
       19. The display device as set forth in claim 14,
 the second conductive film containing aluminum.    
     
     
       20. The display device as set forth in claim 14,
 a wiring being disposed between the first plane and the second conductive film,   the second conductive film being electrically connected to the wiring, and   at least a part of the wiring extending along the first side.    
     
     
       21. The display device as set forth in claim 20,
 the wiring being disposed in a third layer in which a gate electrode of the transistor is formed.    
     
     
       22. The display device as set forth in claim 20,
 the wiring containing a third material included in a gate electrode of the transistor.    
     
     
       23. The display device as set forth in claim 14, further comprising:
 a bank that is disposed above the first plane, the bank being disposed between one first electrode of the plurality of first electrodes and another first electrode of the plurality of first electrodes adjacent to the one first electrode.    
     
     
       24. The display device as set forth in claim 14, further comprising:
 a sealing member arranged above the second electrode,   the sealing member being a flat sealing substrate; and   the sealing substrate joining to the substrate via an adhesive disposed between the sealing member and the first plane.    
     
     
       25. The display device as set forth in claim 24,
 the sealing member including a sealing portion protruding so as to surround an outline of the sealing member.    
     
     
       26. The display device as set forth in claim 25,
 the sealing member including a plurality of thin films.    
     
     
       27. An electronic device, comprising:
 the display device as set forth in claim 14.    
     
     
       28. A display device, comprising:
 a substrate that has a first side and a second side opposite to the first side constituting an outline of the substrate;   a transistor disposed above a first plane of the substrate;   a first insulating film that covers a source electrode or a drain electrode of the transistor;   a plurality of first electrodes disposed above the first insulating film;   a second electrode arranged above the plurality of first electrodes;   a light-emitting layer arranged between at least one of the plurality of first electrodes and the second electrode;   a first conductive film disposed between the second electrode and the first plane, the first conductive film being electrically connected to the second electrode; and   a second conductive film disposed between the first conductive film and the first plane, the second conductive film being electrically connected to the first conductive film,   the first conductive film being disposed between the first side and the plurality of first electrodes,   the first conductive film having a first edge positioned between the first side and the plurality of first electrodes and a second edge positioned between the first edge and the first side in a first cross-section of the display device, the first cross section intersecting with the first side, the second side and the first conductive film,   the first conductive film having a second plane and a third plane, the second plane being disposed between the first plane and the third plane, the second plane not being in contact with the first insulating film except for at the second edge.    
     
     
       29. The display device as set forth in claim 28,
 the first insulating film contacting the source electrode or the drain electrode.    
     
     
       30. A display device, comprising:
 a substrate that has a first side and a second side opposite to the first side constituting an outline of the substrate;   a transistor disposed above a first plane of the substrate;   a first insulating film disposed above a source electrode or a drain electrode of the transistor, the first insulating film having a fourth plane and a fifth plane, the fourth plane being disposed between the first plane and the fifth plane;   a plurality of first electrodes disposed above the first insulating film;   a second electrode arranged above the plurality of first electrodes;   a light-emitting layer arranged between at least one of the plurality of first electrodes and the second electrode;   a first conductive film disposed between the second electrode and the first plane, the first conductive film being electrically connected to the second electrode; and   a second conductive film disposed between the first conductive film and the first plane, the second conductive film being electrically connected to the first conductive film,   the first conductive film being disposed between the first side and the plurality of first electrodes,   the first conductive film having a first edge positioned between the first side and the plurality of first electrodes and a second edge positioned between the first edge and the first side in a first cross-section of the display device, the first cross section intersecting with the first side, the second side and the first conductive film,   the first conductive film having a second plane and a third plane, the second plane being disposed between the first plane and the third plane, the second plane not being in contact with the fifth plane at the second edge.    
     
     
       31. The display device as set forth in claim 30,
 the source electrode or the drain electrode contacting the first insulating film.    
     
     
       32. The display device as set forth in claim 30,
 the second conductive film containing a second material contained in a source electrode or a drain electrode of the transistor.    
     
     
       33. An electronic device, comprising:
 the display device as set forth in claim 30.    
     
     
       34. The display device as set forth in claim 14,
 the first conductive film being disposed between the second side and the plurality of first electrodes.    
     
     
       35. The display device as set forth in claim 28,
 the first conductive film being disposed between the second side and the plurality of first electrodes.    
     
     
       36. The display device as set forth in claim 30,
 the first conductive film being disposed between the second side and the plurality of first electrodes.