Divisionally exposing an active area in LCD with a plurality of shots

• US 7,142,279 B2
• Filed: 09/18/2002
• Issued: 11/28/2006
• Est. Priority Date: 12/14/2001
• Status: Expired due to Term

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Park, Myung-Jae, Tak, Young-Mi, Choi, Kwon-Young, Park, Woon-Yong
• Primary Examiner(s): Schechter, Andrew
• Assistant Examiner(s): NGUYEN, THANH NHAN P
• Application Number:
  US10/469,197
• Publication Number:
  US 20040207798A1
• Time in Patent Office: 1,532 Days
• Field of Search: 349/187
• US Class Current: 349/187
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence
• CPC Class Codes: G02F 1/13625 Patterning using multi-mask exposure

Abstract

In a method of manufacturing a liquid crystal display using a divisional exposure for a substrate, an overlapping area at the boundary between adjacent shots is provided and the shots left and right to the boundary are exposed in a way that the areas of the shots gradually decreases and gradually increases, respectively, to reduce the brightness difference due to stitch errors between the two shots. For example, the number of unit stitch areas assigned to the left gradually decreases and the number of unit stitch areas assigned to the right shot gradually increases as it goes to the right along the transverse direction in the stitch area. A unit stitch includes an area obtained by dividing a pixel into at least two parts.

Claims

1. A method of manufacturing a liquid crystal display by divisionally exposing an active area with a plurality of shots including first and second shots adjacent to each other, the method comprising:

preparing a stitch area which is an overlapping area of the first and the second shots at a boundary between the first shot and the second shot; and

performing gradual decrease of an area for the first shot and gradual increase of an area for the second shot in the stitch area along a direction from the first shot to the second shot,

wherein the decrease of an area for the first shot and the increase of an area for the second shot are preformed by unit of a unit stitch area obtained by dividing a pixel area into at least two parts, a subarea-dividing member is provided in a pixel area, and the subarea-dividing member is located at a boundary between the unit stitch areas, the subarea-dividing member being defined by at least one of a pixel electrode and a common electrode.

2. The method of claim 1, wherein the pixel area is defined by intersections of two adjacent gate lines and data lines and the unit stitch area is defined by one of areas obtained by dividing the pixel area along a division line substantially parallel to the gate lines.

3. The method of claim 2, wherein the pixel area is defined by intersections of two adjacent gate lines and data lines and the unit stitch area is defined by one of areas obtained by dividing the pixel area along a division line substantially parallel to the data lines.

4. The method of claim 1, wherein the pixel area is defined by intersections of two adjacent gate lines and data lines and the unit stitch area is defined by one of areas obtained by dividing the pixel area along a division line substantially parallel to the data lines.

5. The method of claim 1, wherein the subarea-dividing member is one of an aperture, a protrusion, and a depression.

6. The method of claim 1, wherein the subarea-dividing member is formed in at least one of The pixel electrode and the common electrode.

7. A method of manufacturing a liquid crystal display by divisionally exposing an active area with a plurality of shots including first and second shots adjacent to each other, the method comprising:

preparing a stitch area which is an overlapping area of the first and the second shots at a boundary between the first shot and the second shot; and

performing gradual decrease of an area for the first shot and gradual increase of an area for the second shot in the stitch area along a direction from the first shot to the second shot,

wherein the decrease of an area for the first shot and the increase of an area for the second shot are preformed by unit of a unit stitch area obtained by dividing a pixel area into at least two parts, a subarea-dividing member is provided in a pixel area, and the subarea-dividing member is located at a boundary between the unit stitch areas, and wherein the pixel area is defined by intersections of two adjacent gate lines and data lines and the unit stitch area is defined by one of areas obtained by dividing the pixel area along a division line substantially parallel to the gate lines and along a division line substantially parallel to the data lines.