Active matrix organic EL display panel

• US 7,368,868 B2
• Filed: 03/18/2005
• Issued: 05/06/2008
• Est. Priority Date: 02/13/2003
• Status: Expired due to Term

• Current Assignee: UDC Ireland Limited (Universal Display Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Sakamoto, Yoshiaki
• Primary Examiner(s): Santiago; Mariceli
• Application Number:
  US11/083,025
• Publication Number:
  US 20050162079A1
• Time in Patent Office: 1,145 Days
• Field of Search: 313500-512
• US Class Current: 313/505
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels

Abstract

A display device having a bottom emission type, active matrix organic EL panel that efficiently secures a sufficient aperture ratio, has pixel arrangement in which the aperture ratio is not a trade off for higher resolution, and can operate with reduced power consumption and contribute to downsizing of the driving circuit and the device as a whole. The display device includes an active matrix organic EL panel having first and second electrodes provided on a substrate and an organic EL light emitting layer provided between the first and second electrodes. The organic EL light emitting layer includes a light emitting region, a plurality of the light emitting regions are arranged such that adjacent ones of the light emitting regions do not contact each other.

Claims

1. A display device having an active matrix organic EL panel comprising:

first and second electrodes provided on a substrate, and

an organic EL light emitting layer provided between said first and second electrodes, wherein

said organic EL light emitting layer includes light emitting regions,

each pixel of said display device including a plurality of groups each comprising one of said light emitting regions and a switching circuit that controls light emission from the light emitting region provided corresponding to said light emitting region,

the light emitting region and the switching circuit of each of said groups being arranged such that said light emitting region abuts on the switching circuit of adjacent group, and said switching circuit abuts on the light emitting region of the adjacent group, and adjacent light emitting regions do not contact each other.

2. The display device according to claim 1, wherein, three kinds of said light emitting regions corresponding to R, G, and B and three switching circuits corresponding to the three kinds of said light emitting regions are arranged in a matrix, and

in six segments arranged in a 2 by 3 matrix, said light emitting regions are arranged in three of said segments positioned in a zigzag manner and said three switching circuits are arranged in the three remaining segments.

3. The display device according to claim 2, wherein

said light emitting regions for the same color are aligned with said switching circuit interposed therebetween.

4. The display device according to claim 1, wherein

the area of said organic EL light emitting layer is greater than the area of said first electrode.

5. The display device according to claim 1, wherein

a non-light emitting region is formed at a corner of said light emitting region, and adjacent ones of said light emitting regions are separated by said non-light emitting region.

6. The display device according to claim 1, wherein

the area of said light emitting region is greater than the area of said switching circuit.

7. The display device according to claim 1, wherein

said light emitting region has an area smaller than the area of said switching circuit and is separated from adjacent one of said light emitting regions with said switching circuit interposed therebetween.