Organic electroluminescent display device having two sealed EL display panels

• US 7,622,861 B2
• Filed: 02/11/2005
• Issued: 11/24/2009
• Est. Priority Date: 02/17/2004
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: Oooka, Hiroshi, Kato, Shinichi, Furuie, Masamitsu, Ito, Masato
• Primary Examiner(s): Won; Bumsuk
• Application Number:
  US11/055,500
• Publication Number:
  US 20050179378A1
• Time in Patent Office: 1,747 Days
• Field of Search: 313498-512
• US Class Current: 313/504
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• 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 59/128 comprising two independent displays, e.g. for emitting information from two major sides of the display
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/176 comprising two independent displays, e.g. for emitting information from two major sides of the display
• CPC Class Codes: H10K 59/179 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/90 Assemblies of multiple devices comprising at least one organic light-emitting element

Abstract

In an organic EL display panel, one sealing substrate is shared between two organic EL substrates, thereby achieving thinning and lightening of the panel body. The display panel includes a sealing substrate having a first concave portion and a second concave portion opposite the first concave portion, a first transparent glass substrate hermetically sealed on the first concave portion, a first organic light emitting element formed on a surface of the first transparent glass substrate, a first desiccant disposed on a bottom surface of the first concave portion, a second transparent glass substrate hermetically sealed on a the second concave portion, a second organic light emitting element formed on a surface of the second transparent glass substrate, a second desiccant disposed on a surface of the second concave portion, wherein the first organic light emitting element and the second organic light emitting element achieve a shared use of the sealing substrate.

Claims

1. An organic EL display device comprising:

two transparent substrates each including an organic light emitting element including a first electrode, a second electrode, and an organic film formed between the first electrode and the second electrode; and

a sealing substrate for sealing each of said organic light emitting elements;

wherein respective surfaces of said sealing substrate and surfaces of said transparent substrates on which said organic light emitting elements are formed, are positioned facing each other;

a first absorbent layer disposed over one surface of said sealing substrate; and

a second absorbent layer disposed over an inner surface of one of the two transparent substrates in an area other than the area of the one of the organic light emitting element.

2. An organic EL display device according to claim 1,

said sealing substrate having a first concave portion on one surface and a second concave portion on an opposite surface of said first concave portion.

3. An organic EL display device according to claim 1,

wherein a third absorbent layer disposed over the another surface of said sealing substrate.