Color filter panel and liquid crystal display including the same

• US 7,212,261 B2
• Filed: 08/10/2004
• Issued: 05/01/2007
• Est. Priority Date: 10/16/2003
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Rho, Soo-Guy
• Primary Examiner(s): Nguyen; Dung T.
• Assistant Examiner(s): Duong; Thoi V.
• Application Number:
  US10/917,186
• Publication Number:
  US 20050083452A1
• Time in Patent Office: 994 Days
• Field of Search: 349/106, 349/109, 349/108, 349/114, 349/105, 349/78, 349/80, 349/96, 349/97, 349/113
• 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 nigh 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 liquid crystal display 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, wherein the a green color filter is removed at predetermined areas to expose 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.

2. The liquid crystal display of claim 1, wherein the green color filter formed on the outer surface of the first substrate is disposed on all the display area except at red and blue pixel areas, the green and blue color filters formed on the inner surface of the first substrate are respectively disposed on green and blue pixel areas, and the red color filter formed on the inner surface of the first substrate is disposed on all the display area except at the green and blue pixel areas.

3. The liquid crystal display of claim 2, wherein the green color filter formed on the outer surface of the first substrate is at least 2.5 times thicker than the green color filter formed on the inner surface of the first substrate.

4. A color filter panel comprising:

a transparent insulating substrate having two surfaces;

a green color filter formed on a first surface of the insulating substrate; and

red, green, and blue color filters formed on a second surface of the insulating substrate,

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

5. The color filter panel of claim 4, further including a transparent electrode formed on the red, green, and blue color filters.

6. The color filter panel of claim 4, wherein the thickness of the green color filter formed on the first surface is 2.5 times the thickness of the green color filter formed on the second surface.

7. A color filter panel comprising:

a transparent insulating substrate having two surfaces;

a green color filter exclusively formed on a first surface of the first insulating; and

red, green, and blue color filters formed on a second surface of the insulating substrate,

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

8. The color filter panel of claim 7, further including a transparent electrode formed on the red, green, and blue color filters.

9. The color filter panel of claim 8, further including a transparent electrode formed on the red, green, and blue color filters.

10. A color filter panel comprising:

a transparent insulating substrate having two surfaces;

red, green, and blue color filters formed on a second surface of the insulating substrate; and

a green color filter formed on a first surface of the insulating substrate and at least a portion of the green color filter overlaps a boundary of at least two different color filters,

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