DISPLAY DEVICE

• US 20070200488A1
• Filed: 02/26/2007
• Published: 08/30/2007
• Est. Priority Date: 02/27/2006
• Status: Abandoned Application

• Current Assignee: Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: ITO, Naoyuki
• Application Number:
  US11/678,726
• Publication Number:
  US 20070200488A1
• Time in Patent Office: Days
• US Class Current: 313/500
• CPC Class Codes: F21K 2/06 using chemiluminescence
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels

Abstract

The present invention provides an organic light emitting display device which suppresses occurrence of color mixing without lowering light use efficiency.

The organic light emitting display device has a plurality of light emitting devices each disposed in a region surrounded with a lattice (cross)-like bank, and stripe-shaped pixels of an identical color are arranged side by side and displayed due to the emission of the light emitting devices. In the light emitting device, the height of the bank between identical color pixels is formed lower than the height of the bank between different color pixels, thereby suppressing wet spread between adjacent different color pixels to each other upon formation of identical color pixel formation.

Claims

1. A display device having a plurality of light emitting devices on a main surface of a light permeable substrate that is opposed to an insulating substrate and that is airtightly sealed with a sealing member attached to a peripheral portion of the main surface of the light permeable substrate, each of the light emitting devices including a plurality of first electrodes formed on the main surface of the light permeable substrate, a light emitting layer formed covering the plurality of the first electrodes and having a light emitting ability, and a second electrode formed in common with the plurality of light emitting devices on the light emitting layer, the plurality of the light emitting devices forming pixels partitioned from each other by banks, and emitting light from the light emitting layer by way of the first electrode on the side of the light permeable substrate, wherein

stripe-shaped pixels of an identical color due to the emission of the light emitting layer are arranged side by side, and the height of the banks between the pixels of an identical color is lower than the height of the banks between the pixels of different colors.

2. The display device according to claim 1, wherein the bank is formed of an organic material.

3. The display device according to claim 2, wherein the organic material comprises a low molecular weight material.

4. The display device according to claim 2, wherein the organic material comprises a high molecular weight material.

5. The display device according to claim 1, wherein the bank is formed of an inorganic material.

6. The display device according to claim 1, wherein the bank is formed of a laminate of an organic material and an inorganic material.

7. The display device according to claim 1, wherein the light emitting layer is an organic light emitting layer formed by an ink jet method.

8. The display device according to claim 1, wherein the light emitting layer is an inorganic light emitting layer formed by a vapor deposition method.