Organic light emitting display device having one or more color presenting pixels each with spaced apart color characteristics

• US 7,994,712 B2
• Filed: 12/10/2008
• Issued: 08/09/2011
• Est. Priority Date: 04/22/2008
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Sung, Un-Cheol, Choi, Ji-Hye, Song, Young-Rok, Lee, Soo-Yeon
• Primary Examiner(s): Hines; Anne M
• Assistant Examiner(s): GREEN, TRACIE Y
• Application Number:
  US12/331,821
• Publication Number:
  US 20090261715A1
• Time in Patent Office: 972 Days
• Field of Search: 313501-512, 315/169.4, 445 24- 25
• US Class Current: 313/506
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: H10K 50/852 comprising a resonant cavity structure, e.g. Bragg reflector pair
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]

Abstract

An organic light emitting device includes a first pixel displaying a first color, a second pixel adjacent to the first pixel and displaying a second color, and a third pixel adjacent to the first pixel or the second pixel and displaying a third color, wherein the first pixel includes a first and second subpixel units that output respective lights having different color characteristics.

Claims

1. An organic light emitting device comprising:

a first pixel structured to output first light representing a first color to a viewer of the device;

a second pixel disposed adjacent to the first pixel and structured to output second light representing a different second color to the viewer; and

a third pixel disposed adjacent to the first pixel or the second pixel and structured to output third light representing a third color to the viewer, the represented third color being different than each of the represented first and second colors,

wherein the first pixel comprises a first subpixel unit and a second subpixel unit respectively structured to emit respective lights having respective color characteristics which are different from one another, and

wherein each of the first and second subpixel units has a multi-layered thin film structure, and the number of thin films in the first subpixel unit is greater than the number of thin films in the second subpixel unit.

2. The organic light emitting device of claim 1, wherein the different color characteristics of the lights respectively output by the first and second subpixels respectively define spaced apart regions of color coordinates on a color gamut map.

3. The organic light emitting device of claim 1, wherein the first subpixel unit comprises a first transflective electrode.

4. The organic light emitting device of claim 3, wherein

the second pixel has a multi-layered thin film structure including a second transflective electrode, and

the third pixel has a multi-layered thin film structure including a third transflective electrode.

5. The organic light emitting device of claim 4, wherein

the number of thin films in each of the second and third pixels is the same as that of the number of thin films in the first subpixel unit.

6. The organic light emitting device of claim 5, wherein

the first color is a green color , the second color is a red color , and the third color is a blue color.

7. The organic light emitting device of claim 3, wherein

the second pixel comprises a third subpixel unit and a fourth subpixel unit emitting lights having respectively different color characteristics defined as spaced apart color coordinates on a color gamut map,

each of the third and fourth subpixel units has a multi-layered thin film structure,

the number of thin films in the third subpixel unit is the same as the number of the thin films in the first subpixel unit,

the number of thin films in the fourth subpixel unit is the same as the number of the thin films in the second subpixel unit, and

the third subpixel unit comprises a second transflective electrode.

8. The organic light emitting device of claim 7, wherein

the third pixel area has a multi-layered thin film structure including a third transflective electrode.

9. The organic light emitting device of claim 8, wherein

the number of thin films in the third pixel is the same as the number of the thin films in each of the first and third subpixel units.

10. The organic light emitting device of claim 9, wherein

the first color is a red color, the second color is a blue color, and the third color is a green color.

11. The organic light emitting device of claim 7, wherein

the third pixel comprises a fifth subpixel unit and a sixth subpixel unit respectively emitting light having different color characteristics defined as spaced apart color coordinates on the color gamut map,

each of the fifth and sixth subpixel units has a multi-layered thin film structure,

the number of thin films in the fifth subpixel is the same as the number of thin films in each of the first and third subpixel units,

the number of thin films in the sixth subpixel unit is the same as the number of thin films in each of the second and fourth subpixel units, and

the fifth subpixel unit comprises a third transflective electrode.

12. An organic light emitting device comprising:

a thin film structure formed on a substrate;

first, second, and third transflective electrodes formed on the thin film structure;

a first transparent electrode formed on the first transflective electrode;

a second transparent electrode formed directly on the thin film structure

a third transparent electrode formed on the second transflective electrode;

a fourth transparent electrode formed on the third transflective electrode;

a first organic light emitting member formed on the first transparent electrode and structured to output in cooperation with the first transflective electrode, a first light representing a first color to a viewer of the device;

a second organic light emitting member formed on the second transparent electrode and structured to output a second light that is also representing the first color to the viewer;

a third organic light emitting member formed on the third transparent electrode and structured to output in cooperation with the second transflective electrode, a third light representing a different second color to the viewer;

a fourth organic light emitting member formed on the fourth transparent electrode and structured to output n cooperation with the third transflective electrode, a fourth light representing a third color to the viewer, where the represented third color is different from each of the represented first and second colors; and

a common electrode formed on the first to fourth organic light emitting members,

wherein the first and second lights respectively output to and viewable by the viewer have respective different color characteristics.

13. The organic light emitting device of claim 12, wherein

the first color is a green color, the second color is a red color, and the third color is a blue color.

14. The organic light emitting device of claim 12, further comprising:

a fifth transparent electrode formed directly on the thin film structure; and

a fifth organic light emitting member formed on the fifth transparent electrode and capable of emitting a fifth light that is also representative of the second color.

15. The organic light emitting device of claim 14, wherein

the first color is a red color, the second color is a blue color, and the third color is a green color.

16. The organic light emitting device of claim 14, further comprising:

a sixth transparent electrode formed directly on the thin film structure; and

a sixth organic light emitting member formed on the sixth transparent electrode and capable of emitting a sixth light that is also representative of the third color.

17. The organic light emitting device of claim 16, wherein

the sixth transparent electrode has substantially the same voltage as the fourth transparent electrode.

18. The organic light emitting device of claim 14, wherein

the fifth transparent electrode has substantially the same voltage as the third transparent electrode.

19. The organic light emitting device of claim 12, wherein

the second transparent electrode has substantially the same voltage as the first transparent electrode.