EL display device and a method of manufacturing the same

• US 20060180826A1
• Filed: 04/05/2006
• Published: 08/17/2006
• Est. Priority Date: 10/12/1999
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Fukunaga, Takeshi, Hiroki, Masaaki, Yamamoto, Kunitaka, Yamazaki, Shunpei
• Granted Patent: US 7,989,812 B2
• Time in Patent Office: Days
• US Class Current: 257/99
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/84 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/846 comprising getter material or desiccants
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 71/12 using liquid deposition, e.g. spin coating
• CPC Class Codes: H10K 71/135 using ink-jet printing
• CPC Class Codes: H10K 71/851 Division of substrate

Abstract

To provide a high throughput film deposition means for film depositing an organic EL material made of polymer accurately and without any positional shift. A pixel portion is divided into a plurality of pixel rows by a bank, and a head portion of a thin film deposition apparatus is scanned along a pixel row to thereby simultaneously apply a red light emitting layer application liquid, a green light emitting layer application liquid, and a blue light emitting layer application liquid in stripe shapes. Heat treatment is then performed to thereby form light emitting layers luminescing each of the colors red, green, and blue.

Claims

1. An EL display device comprising:

a pixel portion having a plurality of gate wirings, a plurality of source wirings intersecting said plurality of gate wirings, at least one thin film transistor surrounded by said plurality of gate wirings and said plurality of said source wirings, and an EL element electrically connected to said thin film transistor,

wherein said pixel portion comprises a plurality of pixel rows divided along said plurality of gate wirings, and

wherein said plurality of pixel rows comprise a first pixel row in which a red light emitting layer is formed, a second pixel row in which a green light emitting layer is formed, and a third pixel row in which a blue light emitting layer is formed.

1-46. -46. (canceled)

2. An EL display device comprising:

a pixel portion having a plurality of gate wirings, a plurality of source wirings intersecting said plurality of gate wirings, at least one thin film transistor surrounded by said plurality of gate wirings and said plurality of said source wirings, and an EL element electrically connected to said thin film transistor,

wherein said pixel portion comprises a plurality of pixel rows divided along said plurality of source wirings, and

wherein said plurality of pixel rows comprise a first pixel row in which a red light emitting layer is formed, a second pixel row in which a green light emitting layer is formed, and a third pixel row in which a blue light emitting layer is formed.

3. An EL display device comprising:

a pixel portion having a plurality of gate wirings, a plurality of source wirings intersecting said plurality of gate wirings, a plurality of banks provided over said plurality of gate wirings, at least one thin film transistor surrounded by said plurality of gate wirings and said plurality of said source wirings, and an EL element electrically connected to said thin film transistor,

wherein said pixel portion comprises a plurality of pixel rows divided along said plurality of banks, and

wherein said plurality of pixel rows comprise a first pixel row in which a red light emitting layer is formed, a second pixel row in which a green light emitting layer is formed, and a third pixel row in which a blue light emitting layer is formed.

4. An EL display device comprising:

a pixel portion having a plurality of gate wirings, a plurality of source wirings intersecting said plurality of gate wirings, a plurality of banks provided over said plurality of source wirings, at least one thin film transistor surrounded by said plurality of gate wirings and said plurality of said source wirings, and an EL element electrically connected to said thin film transistor,

wherein said pixel portion comprises a plurality of pixel rows divided along said plurality of banks, and

wherein said plurality of pixel rows comprise a first pixel row in which a red light emitting layer is formed, a second pixel row in which a green light emitting layer is formed, and a third pixel row in which a blue light emitting layer is formed.

5. An EL display device comprising:

a pixel portion having a plurality of cathodes arranged in a stripe shape, a plurality of anodes arranged in a stripe shape so as to intersect said plurality of cathodes, and a plurality of light emitting layers provided between said plurality of cathodes and said plurality of anodes,

wherein said pixel portion comprises a plurality of pixel rows divided along said plurality of cathodes, and

wherein said plurality of pixel rows comprise a first pixel row in which a red light emitting layer is formed, a second pixel row in which a green light emitting layer is formed, and a third pixel row in which a blue light emitting layer is formed.

6. An EL display device comprising:

a pixel portion having a plurality of cathodes arranged in a stripe shape, a plurality of anodes arranged in a stripe shape so as to intersect said plurality of cathodes, a plurality of banks provided in the gaps of said plurality of cathodes, and a plurality of light emitting layers provided between said plurality of cathodes and said plurality of anodes,

wherein said pixel portion comprises a plurality of pixel rows divided along said plurality of banks, and

wherein said plurality of pixel rows comprise a first pixel row in which a red light emitting layer is formed, a second pixel row in which a green light emitting layer is formed, and a third pixel row in which a blue light emitting layer is formed.

7. An EL display device according to claim 1, wherein said red light emitting layer, said green light emitting layer and said blue light emitting layer comprise high molecular organic EL materials.

8. An EL display device according to claim 2, wherein said red light emitting layer, said green light emitting layer and said blue light emitting layer comprise high molecular organic EL materials.

9. An EL display device according to claim 3, wherein said red light emitting layer, said green light emitting layer and said blue light emitting layer comprise high molecular organic EL materials.

10. An EL display device according to claim 4, wherein said red light emitting layer, said green light emitting layer and said blue light emitting layer comprise high molecular organic EL materials.

11. An EL display device according to claim 5, wherein said red light emitting layer, said green light emitting layer and said blue light emitting layer comprise high molecular organic EL materials.

12. An EL display device according to claim 6, wherein said red light emitting layer, said green light emitting layer and said blue light emitting layer comprise high molecular organic EL materials.

13. An EL display device according to claim 1, wherein said EL display device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio reproducing device, a personal computer, a game equipment, and a portable information terminal.

14. An EL display device according to claim 2, wherein said EL display device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio reproducing device, a personal computer, a game equipment, and a portable information terminal.

15. An EL display device according to claim 3, wherein said EL display device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio reproducing device, a personal computer, a game equipment, and a portable information terminal.

16. An EL display device according to claim 4, wherein said EL display device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio reproducing device, a personal computer, a game equipment, and a portable information terminal.

17. An EL display device according to claim 5, wherein said EL display device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio reproducing device, a personal computer, a game equipment, and a portable information terminal.

18. An EL display device according to claim 6, wherein said EL display device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio reproducing device, a personal computer, a game equipment, and a portable information terminal.

19. A method for manufacturing an EL display device having a pixel portion comprising a plurality of gate wirings, a plurality of source wirings intersecting said plurality of gate wirings, at least one thin film transistor surrounded by said plurality of gate wirings and said plurality of said source wirings, and an EL element electrically connected to said thin film transistor, said method comprising the steps of:

forming a plurality of pixel rows by dividing said pixel portion along said plurality of gate wirings; and

forming a light emitting layer in each pixel row,

wherein said light emitting layer is selected from the group consisting of a red light emitting layer, a green light emitting layer and a blue light emitting layer.

20. A method for manufacturing an EL display device having a pixel portion comprising a plurality of gate wirings, a plurality of source wirings intersecting said plurality of gate wirings, at least one thin film transistor surrounded by said plurality of gate wirings and said plurality of said source wirings, and an EL element electrically connected to said thin film transistor, said method comprising the steps of:

forming a plurality of pixel rows by dividing said pixel portion along said plurality of source wirings; and

forming a light emitting layer in each pixel row,

wherein said light emitting layer is selected from the group consisting of a red light emitting layer;

a green light emitting layer and a blue light emitting layer.

21. A method for manufacturing an EL display device having a pixel portion comprising a plurality of gate wirings, a plurality of source wirings intersecting said plurality of gate wirings, a plurality of banks provided over said plurality of gate wirings, at least one thin film transistor surrounded by said plurality of gate wirings and said plurality of said source wirings, and an EL element electrically connected to said thin film transistor, said method comprising the steps of:

forming a plurality of pixel rows by dividing said pixel portion along said plurality of banks; and

forming a light emitting layer in each pixel row,

wherein said light emitting layer is selected from the group consisting of a red light emitting layer, a green light emitting layer and a blue light emitting layer.

22. A method for manufacturing an EL display device having a pixel portion comprising a plurality of gate wirings, a plurality of source wirings intersecting said plurality of gate wirings, a plurality of banks provided over said plurality of source wirings, at least one thin film transistor surrounded by said plurality of gate wirings and said plurality of said source wirings, and an EL element electrically connected to said thin film transistor, said method comprising the steps of:

forming a plurality of pixel rows by dividing said pixel portion along said plurality of banks; and

forming a light emitting layer in each pixel row,

wherein said light emitting layer is selected from the group consisting of a red light emitting layer, a green light emitting layer and a blue light emitting layer.

23. A method for manufacturing an EL display device having a pixel portion comprising a plurality of cathodes arranged in a stripe shape, a plurality of anodes arranged in a stripe shape so as to intersect said plurality of cathodes, and a plurality of light emitting layers provided between said plurality of cathodes and said plurality of anodes, said method comprising the steps of:

forming a plurality of pixel rows by dividing said pixel portion along said plurality of cathodes; and

forming a light emitting layer in each pixel row,

wherein said light emitting layer is selected from the group consisting of a red light emitting layer, a green light emitting layer and a blue light emitting layer.

24. A method for manufacturing an EL display device having a pixel portion comprising a plurality of cathodes arranged in a stripe shape, a plurality of anodes arranged in a stripe shape so as to intersect said plurality of cathodes, a plurality of bank provided in the gaps of plurality of cathodes, and a plurality of light emitting layers provided between said plurality of cathodes and said plurality of anodes, said method comprising the steps of:

forming a plurality of pixel rows by dividing said pixel portion along said plurality of banks; and

forming a light emitting layer in each pixel row,

wherein said light emitting layer is selected from the group consisting of a red light emitting layer, a green light emitting layer and a blue light emitting layer.

25. A method according to claim 19, wherein said red light emitting layer, said green light emitting layer and said blue light emitting layer comprise high molecular organic EL materials.

26. A method according to claim 20, wherein said red light emitting layer, said green light emitting layer and said blue light emitting layer comprise high molecular organic EL materials.

27. A method according to claim 21, wherein said red light emitting layer, said green light emitting layer and said blue light emitting layer comprise high molecular organic EL materials.

28. A method according to claim 22, wherein said red light emitting layer, said green light emitting layer and said blue light emitting layer comprise high molecular organic EL materials.

29. A method according to claim 23, wherein said red light emitting layer, said green light emitting layer and said blue light emitting layer comprise high molecular organic EL materials.

30. A method according to claim 24, wherein said red light emitting layer, said green light emitting layer and said blue light emitting layer comprise high molecular organic EL materials.

31. A method according to claim 19, wherein said method further comprises discharging a red light emitting layer application liquid that is to become said red light emitting layer, a green light emitting layer application liquid that is to become said green light emitting layer and a blue light emitting layer application liquid that is to become said blue light emitting layer from separate nozzles at the same time, and performing heat treatment to the discharged said red light emitting layer application liquid, said green light emitting layer application liquid and said blue light emitting layer application liquid.

32. A method according to claim 20, wherein said method further comprises discharging a red light emitting layer application liquid that is to become said red light emitting layer, a green light emitting layer application liquid that is to become said green light emitting layer and a blue light emitting layer application liquid that is to become said blue light emitting layer from separate nozzles at the same time, and perfoming heat treatment to the discharged said red light emitting layer application liquid, said green light emitting layer application liquid and said blue light emitting layer application liquid.

33. A method according to claim 21, wherein said method further comprises discharging a red light emitting layer application liquid that is to become said red light emitting layer, a green light emitting layer application liquid that is to become said green light emitting layer and a blue light emitting layer application liquid that is to become said blue light emitting layer from separate nozzles at the same time, and perfoming heat treatment to the discharged said red light emitting layer application liquid, said green light emitting layer application liquid and said blue light emitting layer application liquid.

34. A method according to claim 22, wherein said method further comprises discharging a red light emitting layer application liquid that is to become said red light emitting layer, a green light emitting layer application liquid that is to become said green light emitting layer and a blue light emitting layer application liquid that is to become said blue light emitting layer from separate nozzles at the same time, and perfoming heat treatment to the discharged said red light emitting layer application liquid, said green light emitting layer application liquid and said blue light emitting layer application liquid.

35. A method according to claim 23, wherein said method further comprises discharging a red light emitting layer application liquid that is to become said red light emitting layer, a green light emitting layer application liquid that is to become said green light emitting layer and a blue light emitting layer application liquid that is to become said blue light emitting layer from separate nozzles at the same time, and perfoming heat treatment to the discharged said red light emitting layer application liquid, said green light emitting layer application liquid and said blue light emitting layer application liquid.

36. A method according to claim 24, wherein said method further comprises discharging a red light emitting layer application liquid that is to become said red light emitting layer, a green light emitting layer application liquid that is to become said green light emitting layer and a blue light emitting layer application liquid that is to become said blue light emitting layer from separate nozzles at the same time, and perfoming heat treatment to the discharged said red light emitting layer application liquid, said green light emitting layer application liquid and said blue light emitting layer application liquid.

37. A method according to claim 19, wherein at least one of said red light emitting layer, said green light emitting layer and said blue light emitting layer is formed by performing heat treatment to an application liquid discharged from a nozzle, and the remaining light emitting layers are formed by a method selected form the group consisting of a spin coating method, a printing method and an evaporation method.

38. A method according to claim 20, wherein at least one of said red light emitting layer, said green light emitting layer and said blue light emitting layer is formed by performing heat treatment to an application liquid discharged from a nozzle, and the remaining light emitting layers are formed by a method selected form the group consisting of a spin coating method, a printing method and an evaporation method.

39. A method according to claim 21, wherein at least one of said red light emitting layer, said green light emitting layer and said blue light emitting layer is formed by performing heat treatment to an application liquid discharged from a nozzle, and the remaining light emitting layers are formed by a method selected form the group consisting of a spin coating method, a printing method and an evaporation method.

40. A method according to claim 22, wherein at least one of said red light emitting layer, said green light emitting layer and said blue light emitting layer is formed by performing heat treatment to an application liquid discharged from a nozzle, and the remaining light emitting layers are formed by a method selected form the group consisting of a spin coating method, a printing method and an evaporation method.

41. A method according to claim 23, wherein at least one of said red light emitting layer, said green light emitting layer and said blue light emitting layer is formed by performing heat treatment to an application liquid discharged from a nozzle, and the remaining light emitting layers are formed by a method selected form the group consisting of a spin coating method, a printing method and an evaporation method.

42. A method according to claim 24, wherein at least one of said red light emitting layer, said green light emitting layer and said blue light emitting layer is formed by performing heat treatment to an application liquid discharged from a nozzle, and the remaining light emitting layers are formed by a method selected form the group consisting of a spin coating method, a printing method and an evaporation method.

43. A method for forming an EL display device comprising the steps of:

forming a pixel portion having at least two adjacent pixels over a substrate; and

providing a light emitting layer application in said two adjacent pixels continuously from a dispenser during moving said dispenser relatively to said substrate,

wherein said light emitting layer application is selected from the group consisting of a red light emitting layer application, a green light emitting layer application and a blue light emitting layer application.

44. A method according to claim 43, wherein said method further comprises performing heat treatment to form a light emitting layer.

45. A method for forming an EL display device comprising the steps of:

forming a pixel portion having at least one pixel row over a substrate;

providing a light emitting layer application in said one pixel row continuously from a dispenser during moving said dispenser relatively to said substrate,

wherein said light emitting layer application is selected from the group consisting of a red light emitting layer application, a green light emitting layer application and a blue light emitting layer application.

46. A method according to claim 45, wherein said method further comprises performing heat treatment to form a light emitting layer.

47. A semiconductor device comprising:

a first glass substrate;

a plurality of first electrodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of first electrodes;

a plurality of second electrodes in a stripe shape so as to intersect with the plurality of first electrodes;

a second glass substrate over the plurality of second electrodes; and

a seal material pasting the first and second glass substrates to each other.

48. The semiconductor device according to claim 47, wherein the light emitting layer includes an organic EL material.

49. The semiconductor device according to claim 47, wherein the semiconductor device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio compo system, a personal computer a game equipment, a mobile computer, a mobile telephone, a mobile game equipment, an electronic book, and an image playback device.

50. The semiconductor device according to claim 47, wherein the device further comprises a bank is formed so as to fill up spaces between the plurality of first electrodes.

51. A semiconductor device comprising:

a first glass substrate;

a plurality of first electrodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of first electrodes;

a plurality of second electrodes in a stripe shape so as to intersect with the plurality of first electrodes;

a second glass substrate over the plurality of second electrodes;

a dry agent provided between the plurality of second electrodes and the second glass substrate; and

a seal material pasting the first and second glass substrates to each other.

52. The semiconductor device according to claim 51, wherein the light emitting layer includes an organic EL material.

53. The semiconductor device according to claim 51, wherein the dry agent includes a barium oxide.

54. The semiconductor device according to claim 51, wherein the device further comprises a bank is formed so as to fill up spaces between the plurality of first electrodes.

55. The semiconductor device according to claim 51, wherein the semiconductor device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio compo system, a personal computer, a game equipment, a mobile computer, a mobile telephone, a mobile game equipment, an electronic book, and an image playback device.

56. A semiconductor device comprising:

a first glass substrate;

a plurality of first electrodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of first electrodes;

a plurality of second electrodes in a stripe shape so as to intersect with the plurality of first electrodes;

a second glass substrate over the plurality of second electrodes;

a dry agent provided between the plurality of second electrodes and the second glass substrate; and

a seal material pasting the first and second glass substrates to each other,

wherein the plurality of first electrodes are transparent and the plurality of second electrodes are reflective.

57. The semiconductor device according to claim 56, wherein the light emitting layer includes an organic EL material.

58. The semiconductor device according to claim 56, wherein the device further comprises a bank is formed so as to fill up spaces between the plurality of first electrodes.

59. The semiconductor device according to claim 56, wherein the semiconductor device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio compo system, a personal computer, a game equipment, a mobile computer, a mobile telephone, a mobile game equipment, an electronic book, and an image playback device.

60. A semiconductor device comprising:

a first glass substrate;

a plurality of first electrodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of first electrodes;

a plurality of second electrodes in a stripe shape so as to intersect with the plurality of first electrodes;

a second glass substrate over the plurality of second electrodes; and

a seal material pasting the first and second glass substrates to each other,

wherein a light generated by the light emitting layer is irradiated toward the first glass substrate.

61. The semiconductor device according to claim 60, wherein the light emitting layer includes an organic EL material.

62. The semiconductor device according to claim 60, wherein the device further comprises a bank is formed so as to fill up spaces between the plurality of first electrodes.

63. The semiconductor device according to claim 60, wherein the semiconductor device is incorporated into an electronic device selected from the group consisting of a video camera, a digital camera, a goggle type display, a car navigation system, an audio compo system, a personal computer, a game equipment, a mobile computer, a mobile telephone, a mobile game equipment, an electronic book, and an image playback device.

64. A car audio system comprising:

a display device, the display device comprising;

a first glass substrate;

a plurality of first electrodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of first electrodes;

a plurality of second electrodes in a stripe shape so as to intersect with the plurality of first electrodes;

a second glass substrate over the plurality of second electrodes; and

a seal material pasting the first and second glass substrates to each other.

65. The car audio system according to claim 64, wherein the light emitting layer includes an organic EL material.

66. The car audio system according to claim 64, wherein the device further comprises a bank is formed so as to fill up spaces between the plurality of first electrodes.

67. A car audio system comprising:

a display device, the display device comprising;

a first glass substrate;

a plurality of first electrodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of first electrodes;

a plurality of second electrodes in a stripe shape so as to intersect with the plurality of first electrodes;

a second glass substrate over the plurality of second electrodes;

a dry agent provided between the plurality of second electrodes and the second glass substrate; and

a seal material pasting the first and second glass substrates to each other.

68. The car audio system according to claim 67, wherein the light emitting layer includes an organic EL material.

69. The car audio system according to claim 67, wherein the dry agent includes a barium oxide.

70. The car audio system according to claim 67, wherein the device further comprises a bank is formed so as to fill up spaces between the plurality of first electrodes.

71. A car audio system comprising:

a display device, the display device comprising;

a first glass substrate;

a plurality of first electrodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of first electrodes;

a plurality of second electrodes in a stripe shape so as to intersect with the plurality of first electrodes;

a second glass substrate over the plurality of second electrodes;

a dry agent provided between the plurality of second electrodes and the second glass substrate; and

a seal material pasting the first and second glass substrates to each other,

wherein the plurality of first electrodes are transparent and the plurality of second electrodes are reflective.

72. The car audio system according to claim 71, wherein the light emitting layer includes an organic EL material.

73. The car audio system according to claim 71, wherein the device further comprises a bank is formed so as to fill up spaces between the plurality of first electrodes.

74. A car audio system comprising:

a display device, the display device comprising;

a first glass substrate;

a plurality of first electrodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of first electrodes;

a plurality of second electrodes in a stripe shape so as to intersect with the plurality of first electrodes;

a second glass substrate over the plurality of second electrodes; and

a seal material pasting the first and second glass substrates to each other,

wherein a light generated by the light emitting layer is irradiated toward the first glass substrate.

75. The car audio system according to claim 74, wherein the light emitting layer includes an organic EL material.

76. The car audio system according to claim 74, wherein the device further comprises a bank is formed so as to fill up spaces between the plurality of first electrodes.

77. An audio reproducing device comprising:

a display device, the display device comprising;

a first glass substrate;

a plurality of first electrodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of first electrodes;

a plurality of second electrodes in a stripe shape so as to intersect with the plurality of first electrodes;

a second glass substrate over the plurality of second electrodes; and

a seal material pasting the first and second glass substrates to each other.

78. The audio reproducing device according to claim 77, wherein the light emitting layer includes an organic EL material.

79. The audio reproducing device according to claim 77, wherein the device further comprises a bank is formed so as to fill up spaces between the plurality of first electrodes.

80. An audio reproducing device comprising:

a display device, the display device comprising;

a first glass substrate;

a plurality of first electrodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of first electrodes;

a plurality of second electrodes in a stripe shape so as to intersect with the plurality of first electrodes;

a second glass substrate over the plurality of second electrodes;

a dry agent provided between the plurality of second electrodes and the second glass substrate; and

a seal material pasting the first and second glass substrates to each other.

81. The audio reproducing device according to claim 80, wherein the light emitting layer includes an organic EL material.

82. The audio reproducing device according to claim 80, wherein the dry agent includes a barium oxide.

83. The audio reproducing device according to claim 80, wherein the device further comprises a bank is formed so as to fill up spaces between the plurality of first electrodes.

84. An audio reproducing device comprising:

a display device, the display device comprising;

a first glass substrate;

a plurality of first electrodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of first electrodes;

a plurality of second electrodes in a stripe shape so as to intersect with the plurality of first electrodes;

a second glass substrate over the plurality of second electrodes;

a dry agent provided between the plurality of second electrodes and the second glass substrate; and

a seal material pasting the first and second glass substrates to each other,

wherein the plurality of first electrodes are transparent and the plurality of second electrodes are reflective.

85. The audio reproducing device according to claim 84, wherein the light emitting layer includes an organic EL material.

86. The audio reproducing device according to claim 84, wherein the device further comprises a bank is formed so as to fill up spaces between the plurality of first electrodes.

87. An audio reproducing device comprising:

a display device, the display device comprising;

a first glass substrate;

a plurality of first electrodes arranged in a stripe shape, over the first glass substrate;

a light emitting layer formed over the plurality of first electrodes;

a plurality of second electrodes in a stripe shape so as to intersect with the plurality of first electrodes;

a second glass substrate over the plurality of second electrodes; and

a seal material pasting the first and second glass substrates to each other,

wherein a light generated by the light emitting layer is irradiated toward the first glass substrate.

88. The audio reproducing device according to claim 87, wherein the light emitting layer includes an organic EL material.

89. The audio reproducing device according to claim 87, wherein the device further comprises a bank is formed so as to fill up spaces between the plurality of first electrodes.