IP Library Granted Patent US 7,326,584
Granted Patent B2
US 7,326,584 · App. 11/017,532 · Granted Feb 5, 2008

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

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Quick Facts
Patent No.
US 7,326,584
App. No.
11/017,532
Granted
Feb 5, 2008
Kind
B2
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 (48)

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; and

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

wherein the method of manufacturing the light emitting element further comprises:

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

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

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

ejecting the blue light emitting material on a portion of the first electrodes between the first blue light emitting patterns to form a plurality of second blue light emitting patterns, and wherein the light emitting material is a red light emitting material, and the first and second light emitting patterns are first red light emitting patterns and second red light emitting patterns, respectively.

2. 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.

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

4. 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.

5. 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; and

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

wherein the method of manufacturing the light emitting element further comprises:

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

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

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

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

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

ejecting the blue light emitting material on a portion of the first electrodes between the first and second blue light emitting patterns to form a plurality of third blue light emitting patterns, and wherein the light emitting material is a red light emitting material, and the first to third light emitting patterns are first red light emitting patterns, second red light emitting patterns and third red light emitting patterns, respectively.

6. The method of claim 5 , wherein the first to third light emitting patterns are arranged in a column direction of the matrix shape.

7. The method of claim 6 , wherein the first light emitting patterns are formed on once in every two to thirty of the first electrodes.

8. The method of claim 5 , wherein the first and second light emitting patterns are spaced apart from one another by a uniform distance.

9. The method of claim 5 , 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.

10. The method of claim 9 , wherein the first to third light emitting patterns are arranged in a random order.

11. 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; and

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

wherein the method of manufacturing the display apparatus further comprises:

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

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

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

ejecting the blue light emitting material on a portion of the first electrodes between the first blue light emitting patterns to form a plurality of second blue light emitting patterns, and wherein the light emitting material is a red light emitting material, and the first and second light emitting patterns are first red light emitting patterns and second red light emitting patterns, respectively.

12. The method of claim 11 , 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.

13. The method of claim 12 , wherein the first and second light emitting patterns are arranged in a random order.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 17, 2012
From: SAMSUNG ELECTRONICS CO., LTD.
To: SAMSUNG DISPLAY CO., LTD.
Reel/Frame 029045/0860 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 14, 2005
From: LEE, DONG-WON; CHOI, JOON-HOO; CHUNG, JIN-KOO
To: SAMSUNG ELECTRONICS CO., LTD.
Reel/Frame 016362/0795 →