Display device having a connection area outside the display area

Abstract

An object of the present invention is to provide aA 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 adhesive. 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.

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 having a display area, a first connection area that is positioned between the display area and a first edge of the substrate, and a second connection area that is positioned between the display area and a second edge of the substrate;        a first electrode disposed in the display area;        a second electrode disposed above the display area, the first connection area, and the second connection area;        a light emitting layer disposed between the first electrode and the second electrode; and        a wiring electrically connected to the second electrode in the first connection area and the second connection area, and        the wiring having a first portion that extends along the first edge of the substrate and a second portion that extends along the second edge of the substrate, the wiring electrically contacting the second electrode along the first edge and the second edge.     
     
     
       15. The display device according to  claim 14 , further comprising:
   an interlayer insulation film disposed in the display area, between the display area and the first connection area, and between the display area and the second connection area,        wherein the first portion of the bank and the second portion of the bank are disposed on the interlayer insulation film.     
     
     
       16. The display device according to  claim 14 , a conductive layer being disposed between the wiring and the second electrode. 
     
     
       17. The display device according to  claim 14 , the wiring being electrically connected to the second electrode continuously along at least a portion of the edge. 
     
     
       18. The display device according to  claim 14 , the first portion of the wiring being spaced apart from the first edge and the second portion of the wiring being spaced apart from the second edge. 
     
     
       19. A display device comprising:
   a substrate having a display area, a first connection area that is positioned between the display area and a first edge of the substrate, and a second connection area that is positioned between the display area and a second edge of the substrate;        a first electrode disposed in the display area;        a second electrode disposed above the display area, the first connection area, and the second connection area;        a light emitting layer disposed between the first electrode and the second electrode;        a wiring electrically connected to the second electrode in the first connection area and the second connection area; and        a bank having a first portion disposed in the display area and a second portion disposed between the display area and the first connection area, the second portion being in a non - overlapping condition with the first connection area, and        the wiring having a first portion that extends along the first edge of the substrate and a second portion that extends along the second edge of the substrate, the wiring electrically contacting the second electrode along the first edge and the second edge.     
     
     
       20. The display device according to  claim 19 , further comprising:
   an interlayer insulation film disposed in the display area, between the display area and the first connection area, and between the display area and the second connection area,        wherein the first portion of the bank and the second portion of the bank are disposed on the interlayer insulation film.     
     
     
       21. A display device comprising:
   a substrate having a display area, a first connection area that is positioned between the display area and a first edge of the substrate, and a second connection area that is positioned between the display area and a second edge of the substrate;        an interlayer insulation film disposed between the display area and the first connection area;        a first electrode disposed in the display area;        a second electrode disposed above the display area, the first connection area, and the second connection area;        a light emitting layer disposed between the first electrode and the second electrode;        a wiring electrically connected to the second electrode in the first connection area and the second connection area; and        a bank disposed on the interlayer insulation film between the display area and the first connection area, the first connection area being disposed to the outside of the bank, and        the wiring having a first portion that extends along the first edge of the substrate and a second portion that extends along the second edge of the substrate, the wiring electrically contacting the second electrode along the first edge and the second edge.     
     
     
       22. The display device according to  claim 21 , wherein the first connection area follows a first edge of the bank and the second connection area follows a second edge of the bank. 
     
     
       23. The display device according to  claim 21 , wherein the display area is disposed to an inside of the bank. 
     
     
       24. A display device comprising:
   a substrate having a first side opposite from a second side, and a third side opposite from a fourth side;        a plurality of data lines disposed above the substrate;        a plurality of first electrodes disposed above the substrate;        a second electrode opposite to the plurality of the first electrodes;        a plurality of light emitting elements disposed between the plurality of the first electrodes and the second electrode;        a first wiring following the first side of the substrate, the first wiring connected to the second electrode;        a second wiring following the second side of the substrate, the second wiring connected to the second electrode;        a first wiring tape attached to the third side of the substrate; and        a second wiring tape attached to the fourth side of the substrate.     
     
     
       25. The display device according to  claim 24 , the plurality of light emitting elements being separate from each other. 
     
     
       26. 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; and          a common electrode layer that is spread out to a periphery of the substrate and that covers the plurality of display elements and the bank layer,        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 a plane, and the connection area is continuously positioned outside of the bank layer along the sides of the substrate.