MONOCHROME LIGHT EMITTING DISPLAY DEVICE AND METHOD FOR FABRICATING THE SAME

• US 20110032277A1
• Filed: 12/23/2009
• Published: 02/10/2011
• Est. Priority Date: 05/27/2009
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Choi, Seung-Kyu, Lee, Nam-Yang, LEE, Se-Hee, Ahn, Byung-Chul, Lee, Seok-Jong
• Granted Patent: US 8,890,899 B2
• Time in Patent Office: Days
• US Class Current: 345/690
• 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 2320/0242 Compensation of deficiencies in the appearance of colours
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays

Abstract

A monochrome light emitting display device and a method for fabricating the same are disclosed, in which a pixel structure of a monochrome light emitting display device is changed to improve a contrast ratio and resolution and at the same time color shift is prevented from occurring, so as to display clearer image. The monochrome light emitting display device comprises a display panel having unit pixels of first and second sub-pixels arranged in a matrix arrangement to display a monochrome image; gate and data drivers respectively driving gate lines and data lines of the display panel; and a timing controller aligning externally input RGB data to be suitable for driving of the display panel to supply the RGB data to the data driver and generating data and gate control signals to control the data and gate drivers.

Claims

1. A monochrome light emitting display device comprising:

a display panel having unit pixels of first and second sub-pixels arranged in a matrix arrangement to display a monochrome image;

gate and data drivers respectively driving gate lines and data lines of the display panel; and

a timing controller that aligns externally input RGB data to be suitable for driving of the display panel to supply the RGB data to the data driver and generates data and gate control signals to control the data and gate drivers.

2. The monochrome light emitting display device as claimed in claim 1, wherein each of the first and second sub-pixels constituting each unit pixel has a vertical stripe type or a horizontal stripe type.

3. The monochrome light emitting display device as claimed in claim 2, wherein each of the first and second sub-pixels is not provided with a color filter, and the first and second sub-pixels are formed at the same size or different sizes.

4. The monochrome light emitting display device as claimed in claim 3, wherein each of the first and second sub-pixels includes at least one switching device and at least one light emitting cell, and the light emitting cell formed in the first sub-pixel includes a first electrode having a thickness the same as or different from that of a first electrode of the light emitting cell formed in the second sub-pixel.

5. The monochrome light emitting display device as claimed in claim 4, wherein the light emitting cell formed in the first sub-pixel includes an organic light emitting layer having a thickness the same as or different from that of an organic light emitting layer of the light emitting cell formed in the second sub-pixel.

6. The monochrome light emitting display device as claimed in claim 5, wherein each unit pixel of the first and second sub-pixels is formed at a size of 2/3 of a unit pixel of red, green and blue sub-pixels.

7. A method for fabricating a monochrome light emitting display device that includes a monochrome light emitting display panel, drivers driving the monochrome light emitting display panel, and a timing controller controlling the drivers, the method comprising:

fabricating the monochrome display panel by arranging unit pixels of first and second sub-pixels in a matrix arrangement to display a monochrome image.

8. The method as claimed in claim 7, wherein the step of fabricating the monochrome display panel includes forming each of the first and second sub-pixels constituting each unit pixel in a vertical stripe type or a horizontal stripe type.

9. The method as claimed in claim 8, wherein, in the step of fabricating the monochrome display panel, each of the first and second sub-pixels is not provided with a color filter, and the first and second sub-pixels are formed at the same size or different sizes.

10. The method as claimed in claim 9, wherein the step of fabricating the monochrome display panel further includes forming at least one switching device and at least one light emitting cell, and the light emitting cell formed in the first sub-pixel includes a first electrode having a thickness the same as or different from that of a first electrode of the light emitting cell formed in the second sub-pixel.

11. The method as claimed in claim 10, wherein the light emitting cell formed in the first sub-pixel includes an organic light emitting layer having a thickness the same as or different from that of an organic light emitting layer of the light emitting cell formed in the second sub-pixel.

12. The method as claimed in claim 11, wherein the step of fabricating the monochrome display panel includes forming each unit pixel of the first and second sub-pixels at a size of ⅔

of a unit pixel formed by red, green and blue sub-pixels.