Method of manufacturing light emitting element and method of manufacturing display apparatus having the same

• US 20080090484A1
• Filed: 12/10/2007
• Published: 04/17/2008
• Est. Priority Date: 12/19/2003
• Status: Abandoned Application

• Current Assignee: Dong-Won Lee, Jin-Koo Chung, Joon-Hoo Choi
• Original Assignee: Dong-Won Lee, Jin-Koo Chung, Joon-Hoo Choi
• Inventors: Lee, Dong-Won, Choi, Joon-Hoo, Chung, Jin-Koo
• Application Number:
  US11/953,736
• Publication Number:
  US 20080090484A1
• Time in Patent Office: Days
• US Class Current: 445/49
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• 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
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/135 using ink-jet printing

Abstract

In a method of manufacturing a light emitting element, a plurality of first electrodes arranged in a matrix shape is formed on a pixel area of a base substrate. A bank is formed between the first electrodes. A light emitting material is ejected on a portion of the first electrodes spaced apart from one another to form a plurality of first light emitting patterns. The light emitting material is erected on a portion of the first electrodes between the first light emitting patterns to form a plurality of second light emitting patterns. A second electrode is formed on the first and second light emitting patterns. Therefore, a luminance of the light emitting element is improved and uniformized.

Claims

1. A method of manufacturing a light emitting element comprising:

forming a plurality of first electrodes arranged in a matrix shape on a pixel area of a base substrate;

forming a bank between the first electrodes;

ejecting a light emitting material on a portion of the first electrodes spaced apart from one another to form a plurality of first light emitting patterns;

ejecting the light emitting material on a portion of the first electrodes between the first light emitting patterns to form a plurality of second light emitting patterns;

forming a second electrode on the first and second light emitting patterns; and

forming a plurality of dummy light emitting patterns on a peripheral region of the base substrate, and wherein the peripheral region surrounds the pixel area.

2. The method of claim 1, wherein the second light emitting patterns comprise substantially identical color to the first light emitting patterns.

3. The method of claim 1, further comprising ejecting the light emitting material on a portion of the first electrodes between the first and second light emitting patterns to form a plurality of third light emitting patterns.

4. The method of claim 1, wherein the first and second light emitting patterns are arranged in a random order.

5. The method of claim 1, wherein the light emitting material comprises an organic light emitting material and a volatile material, and an evaporation rate of the volatile material of the first light emitting patterns is substantially equal to an evaporation rate of the volatile material of the second light emitting patterns.

6. A method of manufacturing a light emitting element comprising:

forming a plurality of first electrodes arranged in a matrix shape on a pixel area of a base substrate;

forming a bank between the first electrodes;

ejecting a light emitting material on a portion of the first electrodes spaced apart from one another to form a plurality of first light emitting patterns;

ejecting the light emitting material on a portion of the first electrodes between the first light emitting patterns to form a plurality of second light emitting patterns;

ejecting the light emitting material on a portion of the first electrodes between the first and second light emitting patterns to form a plurality of third light emitting patterns;

forming a second electrode on the first to third light emitting patterns; and

forming a plurality of dummy light emitting patterns on a peripheral region of the base substrate, and wherein the peripheral region surrounds the pixel area.

7. The method of claim 6, wherein the first to third light emitting patterns comprise substantially identical color to one another.

8. The method of claim 6, wherein the first to third light emitting patterns are arranged in a column direction of the matrix shape.

9. The method of claim 8, wherein the first light emitting patterns are formed on once in every two to thirty of the first electrodes.

10. The method of claim 6, wherein the first and second light emitting patterns are spaced apart from one another by a uniform distance.

11. The method of claim 6, wherein forming of the first to third light emitting patterns is repeated until the first to third light emitting patterns are formed on all of the first electrodes.

12. The method of claim 11, wherein the first to third light emitting patterns are arranged in a random order.

13. A method of manufacturing a display apparatus comprising:

forming a plurality of switching devices on a pixel area of a base substrate;

forming a plurality of driver devices on the pixel area of the base substrate, a gate electrode of each of the driver devices being electrically connected to a source/drain electrode of each of the switching devices;

forming a plurality of first electrodes arranged in a matrix shape on the pixel area of the base substrate;

forming a bank between the first electrodes;

ejecting a light emitting material on a portion of the first electrodes spaced apart from one another to form a plurality of first light emitting patterns;

ejecting the light emitting material on a portion of the first electrodes between the first light emitting patterns to form a plurality of second light emitting patterns;

forming a second electrode on the first and second light emitting patterns; and

forming a plurality of dummy light emitting patterns on a peripheral region of the base substrate, and wherein the peripheral region surrounds the pixel area.

14. The method of claim 13, wherein the second light emitting patterns comprise substantially identical color to the first light emitting patterns.

15. The method of claim 13, wherein the forming of the first and second light emitting patterns is repeated, until the first and second light emitting patterns are formed on all of the first electrodes.

16. The method of claim 15, wherein the first and second light emitting patterns are arranged in a random order.