Display device and manufacturing method thereof

• US 20050184652A1
• Filed: 04/12/2004
• Published: 08/25/2005
• Est. Priority Date: 02/01/2001
• Status: Abandoned Application

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Maruyama, Junya, Yamazaki, Shunpei
• Application Number:
  US10/821,927
• Publication Number:
  US 20050184652A1
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2310/0251 Precharge or discharge of pixel before applying new pixel voltage
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• 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 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/127 comprising two substrates, e.g. display comprising OLED array and TFT driving circuitry on different substrates
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/17 Passive-matrix OLED displays
• CPC Class Codes: H10K 59/871 Self-supporting sealing arrangements
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/874 including getter material or desiccant
• CPC Class Codes: H10K 59/875 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 77/10 : Substrates, e.g. flexible substrates
• CPC Class Codes: Y02E 10/549 : Organic PV cells
• CPC Class Codes: Y02P 70/50 : Manufacturing or production processes characterised by the final manufactured product

Abstract

In a display device using an organic light emitting diode (OLED), the occurrence or a dark spot and peeling of a cathode due to moisture are suppressed. An outer edge portion of a sealing substrate (second substrate) (102) is made to have a convex shape and a gap between the sealing substrate and an element substrate are controlled by means of this convex region. Thus, since it is not required that a layer (106) having adhesion for bonding together the sealing substrate and the element substrate has a function for controlling the gap, the thickness of the layer can be minimized. Therefore, the amount of moisture which is transmitted through the layer (having adhesion) made of an organic material and penetrated in a sealed region can be reduced.

Claims

1-48. -48. (canceled)

49. A mobile telephone comprising:

a display panel, the display panel comprising;

a first substrate;

an organic light emitting element over the first substrate; and

a second substrate which is translucent, the second substrate is bonded to the first substrate through a layer having adhesion,

wherein minute unevennesses are formed on a surface of the second substrate.

50. A mobile telephone according to claim 49, wherein height of the minute unevennesses is set to be 0.1 μ

m to 3 μ

m.

51. A mobile telephone according to claim 49, wherein the spacing between convex portions of the minute unevennesses is set to be 0.05 μ

m to 1 μ

m.

52. A mobile telephone according to claim 49, wherein the first and second substrates are glass substrates.

53. A mobile telephone according to claim 49, wherein a thickness of the layer having adhesion is 10 μ

m or less.

54. A digital camera comprising:

a display panel, the display panel comprising;

a first substrate;

an organic light emitting element over the first substrate; and

a second substrate which is translucent, the second substrate is bonded to the first substrate through a layer having adhesion,

wherein minute unevennesses are formed on a surface of the second substrate.

55. A digital camera according to claim 54, wherein height of the minute unevennesses is set to be 0.1 μ

m to 3 μ

m.

56. A digital camera according to claim 54, wherein the spacing between convex portions of the minute unevennesses is set to be 0.05 μ

m to 1 μ

m.

57. A digital camera according to claim 54, wherein the first and second substrates are glass substrates.

58. A digital camera according to claim 54, wherein a thickness of the layer having adhesion is 10 μ

m or less.

59. A mobile telephone comprising:

a display panel, the display panel comprising;

a first substrate;

an organic light emitting element over the first substrate; and

a second substrate which is translucent, the second substrate is bonded to the first substrate through a layer having adhesion,

wherein minute unevennesses are formed on a surface of the second substrate, and

wherein a surface of the second substrate opposing the first substrate comprises a first thickness at a first region and a second thickness at a second region, the first region is adhered with the layer having adhesion, and the second region is located inside the first region and concaved relative to the first region.

60. A mobile telephone according to claim 59, wherein height of the minute unevennesses is set to be 0.1 μ

m to 3 μ

m.

61. A mobile telephone according to claim 59, wherein the spacing between convex portions of the minute unevennesses is set to be 0.05 μ

m to 1 μ

m.

62. A mobile telephone according to claim 59, wherein the first and second substrates are glass substrates.

63. A mobile telephone according to claim 59, wherein a thickness of the layer having adhesion is 10 μ

m or less.

64. A digital camera comprising:

a display panel, the display panel comprising;

a first substrate;

an organic light emitting element over the first substrate; and

a second substrate which is translucent, the second substrate is bonded to the first substrate through a layer having adhesion,

wherein minute unevennesses are formed on a surface of the second substrate, and

wherein a surface of the second substrate opposing the first substrate comprises a first thickness at a first region and a second thickness at a second region, the first region is adhered with the layer having adhesion, and the second region is located inside the first region and concaved relative to the first region.

65. A digital camera according to claim 64, wherein height of the minute unevennesses is set to be 0.1 μ

m to 3 μ

m.

66. A digital camera according to claim 64, wherein the spacing between convex portions of the minute unevennesses is set to be 0.05 μ

m to 1 μ

m.

67. A digital camera according to claim 64, wherein the first and second substrates are glass substrates.

68. A digital camera according to claim 64, wherein a thickness of the layer having adhesion is 10 μ

m or less.

69. A mobile telephone comprising:

a display panel, the display panel comprising;

a first substrate;

an organic light emitting element over the first substrate; and

a second substrate which is translucent, the second substrate is bonded to the first substrate through a layer having adhesion,

wherein minute unevennesses are formed on a surface of the second substrate,

wherein a surface of the second substrate opposing the first substrate comprises a first region, a second region, and a third region, the first region is adhered with the layer having adhesion, the second region is located inside the first region and concaved relative to the first region, the third region is located inside the second region and concaved relative to the second region, and

wherein a dry agent is provided in the third region.

70. A mobile telephone according to claim 69, wherein height of the minute unevennesses is set to be 0.1 μ

m to 3 μ

m.

71. A mobile telephone according to claim 69, wherein the spacing between convex portions of the minute unevennesses is set to be 0.05 μ

m to 1 μ

m.

72. A mobile telephone according to claim 69, wherein the first and second substrates are glass substrates.

73. A mobile telephone according to claim 69, wherein a thickness of the layer having adhesion is 10 μ

m or less.

74. A digital camera comprising:

a display panel, the display panel comprising;

a first substrate;

an organic light emitting element over the first substrate; and

a second substrate which is translucent, the second substrate is bonded to the first substrate through a layer having adhesion,

wherein minute unevennesses are formed on a surface of the second substrate,

wherein a surface of the second substrate opposing the first substrate comprises a first region, a second region, and a third region, the first region is adhered with the layer having adhesion, the second region is located inside the first region and concaved relative to the first region, the third region is located inside the second region and concaved relative to the second region, and

wherein a dry agent is provided in the third region.

75. A digital camera according to claim 74, wherein height of the minute unevennesses is set to be 0.1 μ

m to 3 μ

m.

76. A digital camera according to claim 74, wherein the spacing between convex portions of the minute unevennesses is set to be 0.05 μ

m to 1 μ

m.

77. A digital camera according to claim 74, wherein the first and second substrates are glass substrates.

78. A digital camera according to claim 74, wherein a thickness of the layer having adhesion is 10 μ

m or less.