Display panel and method for manufacturing display panel

• US 20050174042A1
• Filed: 01/13/2005
• Published: 08/11/2005
• Est. Priority Date: 01/16/2004
• Status: Abandoned Application

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Nishikawa, Ryuji, Omura, Tetsuji
• Application Number:
  US11/035,464
• Publication Number:
  US 20050174042A1
• Time in Patent Office: Days
• US Class Current: 313/500
• CPC Class Codes: B23K 2101/40 Semiconductor devices
• CPC Class Codes: B23K 26/009 using a non-absorbing, e.g. transparent, reflective or refractive, layer on the workpiece using a mask on the workpiece B23K26/066
• CPC Class Codes: B23K 26/18 using absorbing layers on the workpiece, e.g. for marking or protecting purposes
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• 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 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

A sealing substrate is placed opposing an EL substrate with a predetermined gap therebetween. The sealing substrate is nontransparent. A laser irradiation region of a terminal portion of the EL substrate is formed by a transparent conductor such as ITO. With this structure, a periphery region of the sealing substrate is irradiated with laser through the EL substrate and heated, so that glass is elevated and welded.

Claims

1. A manufacturing method of a display panel, wherein

the display panel comprises a pixel substrate which is made of a material which allows laser to transmit and having a display region in which a plurality of display pixels are formed in a matrix form and a periphery region surrounding the display region and a sealing substrate which is placed opposing the pixel substrate,

a line present in the periphery region of the pixel substrate and in a portion which allows laser to transmit is formed by a transparent conductor, and

a junction interface between the pixel substrate and the sealing substrate is sealed through welding by irradiation of laser.

2. A manufacturing method of a display panel according to claim 1, wherein

the transparent conductor is ITO or IZO.

3. A manufacturing method of a display panel according to claim 1, wherein

an absorbing structure which absorbs laser is formed at the junction interface, and

the sealing through welding is effected by the absorbing structure absorbing the laser and being heated.

4. A manufacturing method of a display panel according to claim 3, wherein

the absorbing structure is formed by doping a nontransparent material into the sealing substrate or through film formation of a nontransparent material on the sealing substrate by vacuum evaporation, sputtering, CVD, or application..

5. A manufacturing method of a display panel according to claim 4, wherein

the nontransparent material is a metal.

6. A manufacturing method of a display panel according to claim 1, wherein

the material which allows laser to transmit is glass.

7. A display panel comprising:

a pixel substrate formed by a material which allows laser to transmit and having a display region in which a plurality of display pixels are formed in a matrix form and a periphery region which surrounds the display region, and

a sealing substrate having a junction interface with the pixel substrate sealed through welding by laser irradiation, wherein

a line present in the periphery region of the pixel substrate and in a portion which allows laser to transmit is made of a transparent conductor.

8. A display panel according to claim 7, wherein

the transparent conductor is ITO or IZO.

9. A display panel according to claim 7, wherein

an absorbing structure which absorbs laser is formed in the junction interface.

10. A display panel according to claim 9, wherein

the absorbing structure is formed by doping a nontransparent material into the sealing substrate or through film formation of a nontransparent material on the sealing substrate by vacuum evaporation, sputtering, CVD, or coating.

11. A display panel according to claim 10, wherein

the nontransparent material is a metal.