Display including emission layer

• US 7,479,734 B2
• Filed: 09/25/2006
• Issued: 01/20/2009
• Est. Priority Date: 09/28/2001
• Status: Expired due to Term

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Tsujioka, Tsuyoshi, Hamada, Yuji, Matsusue, Noriyuki
• Primary Examiner(s): Patel; Nimeshkumar D
• Assistant Examiner(s): Hollweg; Thomas A
• Application Number:
  US11/526,058
• Publication Number:
  US 20070013299A1
• Time in Patent Office: 848 Days
• Field of Search: 313448-512, 345/82, 315/169.3
• US Class Current: 313/505
• CPC Class Codes: H10K 50/824 combined with auxiliary electrodes
• CPC Class Codes: H10K 50/87 Arrangements for heating or cooling
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/1315 comprising structures specially adapted for lowering the resistance
• CPC Class Codes: H10K 59/80522 combined with auxiliary electrodes
• CPC Class Codes: H10K 59/8794 Arrangements for heating and cooling

Abstract

A display capable of preventing an emission layer from deterioration resulting from temperature rise of an electrode also when the same is increased in size and easily connectable with an external current source also when the same is connected with the external current source on a single portion is provided. This display comprises a first electrode formed on a substrate, an emission layer formed on the first electrode, a second electrode formed on the emission layer, a peripheral electrode, arranged to enclose the outer periphery of the second electrode and connected with at least three edges of the outer periphery of the second electrode, having a smaller sheet resistance value than the second electrode, and a current source connection terminal connected to the outer periphery of the peripheral electrode. Thus, current readily flows from the second electrode toward the peripheral electrode, while the current can be dispersedly fed along three or four directions.

Claims

1. A display comprising:

a first electrode formed on a substrate;

an emission layer formed on said first electrode;

a second electrode having an outer periphery defined by side surfaces formed on said emission layer;

a peripheral electrode, arranged to enclose the outer periphery of said second electrode and connected with four side surfaces of the outer periphery of said second electrode, having a smaller sheet resistance value than said second electrode; and

a current source connection terminal connected to the outer periphery of said peripheral electrode, wherein

said second electrode is formed to cover not only an upper surface, but also a side surface of said emission layer.

2. The display according to claim 1 wherein said peripheral electrode is formed to be in contact substantially with the overall surfaces of said four side surfaces of the outer periphery of said second electrode.

3. A display comprising:

a first electrode formed on a substrate;

an emission layer formed on said first electrode;

a second electrode formed on said emission layer, the second electrode is formed to cover not only an upper surface, but also a side surface of said emission layer;

a peripheral electrode, arranged to enclose the outer periphery of said second electrode and connected with at least three edges of the outer periphery of said second electrode, having a smaller sheet resistance value than said second electrode; and

a current source connection terminal connected to the outer periphery of said peripheral electrode, wherein said emission layer includes an organic layer.

4. A display comprising:

a first electrode formed on a substrate;

an emission layer formed on said first electrode;

a second electrode formed on said emission layer, the second electrode is formed to cover not only an upper surface, but also a side surface of said emission layer;

a peripheral electrode, arranged to enclose the outer periphery of said second electrode and connected with at least three edges of the outer periphery of said second electrode, having a smaller sheet resistance value than said second electrode; and

a current source connection terminal connected to the outer periphery of said peripheral electrode, wherein the display includes a plurality of pixels.