Color filter panel and liquid crystal display including the same

• US 7,486,355 B2
• Filed: 03/16/2007
• Issued: 02/03/2009
• Est. Priority Date: 10/16/2003
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Rho, Soo-Gyu
• Primary Examiner(s): Duong; Thoi V
• Application Number:
  US11/687,173
• Publication Number:
  US 20070165158A1
• Time in Patent Office: 690 Days
• Field of Search: 349/106, 349/105, 349/109, 349/110, 349/187, 353/84, 345/87, 345/88
• US Class Current: 349/106
• CPC Class Codes: G02F 1/133514 Colour filters

Abstract

An LCD comprising a first substrate having an inner surface and an outer surface; a green color filter formed on the outer surface of the first substrate; red, green, and blue color filters formed on the inner surface of the first substrate; a second substrate facing the first substrate and having an inner surface and an outer surface; a pixel electrode formed on the inner surface of the second substrate; a common electrode formed on the inner surface of one of the first and second substrates; and a liquid crystal layer disposed between the first substrate and the second substrate is provided. By this structure, a green light having color purity is produced. The manufacturing method of an LCD is simplified by replacing the black matrix with the overlapped color filters.

Claims

1. A method of manufacturing a liquid crystal display, the method comprising:

forming a first green color filter on an outer surface of a first substrate, wherein the first green color filter is removed at predetermined areas to expose the outer surface of the first substrate;

forming a red color filter, a second green color filter, and a blue color filter on an inner surface of the first substrate;

forming a pixel electrode on an inner surface of a second substrate;

forming a common electrode on the inner surface of one of the first and second substrates; and

forming a liquid crystal layer between the first substrate and the second substrate.

2. The method of claim 1, wherein the first green color filter is disposed on all the display area except at a red pixel area and a blue pixel area, the second green color filter is disposed on a green pixel area, the blue color filter is disposed on the blue pixel area, and the red color filter is disposed on all the display area except at the green and blue pixel areas.

3. The method of claim 2, wherein the first green color filter is at least 2.5 times thicker than the second green color filter.

4. A method of manufacturing a color filter panel, the method comprising:

forming a first green color filter on a first surface of a transparent insulating substrate; and

forming a red color filter, a second green color filter, and a blue color filter on a second surface of the insulating substrate,

wherein the first green color filter is removed at predetermined areas to expose the first surface of the insulating substrate, the red color filter is disposed everywhere except at areas where the second green color filter and the blue color filter are disposed, and the red color filter and the blue color filter are seen through the predetermined areas exposing the first surface of the insulating substrate.

5. The method of claim 4, further comprising:

forming a transparent electrode on the red color filter, the second green color filter, and the blue color filter.

6. The method of claim 4, wherein the thickness of the first green color filter is 2.5 times the thickness of the second green color filter.

7. A method of manufacturing a color filter panel, the method comprising:

forming a first green color filter exclusively on a first surface of a substrate; and

forming a red color filter, a second green color filter, and a blue color filter on a second surface of the substrate,

wherein the first green color filter is removed at predetermined areas to expose the first surface of the substrate.

8. The method of claim 7, further comprising:

forming a transparent electrode on the red color filter, the second green color filter, and the blue color filter.

9. A method of manufacturing a color filter panel, the method comprising:

forming a red color filter, a first green color filter, and a blue color filter on a first surface of a substrate; and

forming a second green color filter on a second surface of the substrate, the second green color filter overlapping a boundary of adjacent two of the red color filter, the first green color filter, and the blue color filter,

wherein the second green color filter formed on the second surface is removed at predetermined areas to expose the second surface of the substrate.

10. The method of claim 9, further comprising:

forming a transparent electrode on the red color filter, the first green color filter, and the blue color filter.