Display device including integrated touch panel

• US 9,256,309 B2
• Filed: 04/02/2013
• Issued: 02/09/2016
• Est. Priority Date: 11/13/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Lee, So-Hyung, Oh, Jun-Seok
• Primary Examiner(s): Wang, Quan-Zhen
• Assistant Examiner(s): DICKE, CHAD M
• Application Number:
  US13/855,237
• Publication Number:
  US 20140132526A1
• Time in Patent Office: 1,043 Days
• Field of Search: 345173-178, 178 1801- 2001
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A display device comprises a touch panel including a plurality of electrode columns that each includes a plurality of electrodes positioned in the electrode column. The display device further comprises a plurality of lines, each of which is connected to a corresponding electrode included in a corresponding one of the plurality of electrode columns. The lengths of the lines within a first electrode column increase as the lines are positioned further from one end of the first electrode column that is not adjacent to the second electrode column in a direction substantially perpendicular to a longitudinal direction of the lines of the first electrode column and the lengths of the lines within a second electrode column decrease as the lines are positioned further from the one end of the first electrode column in the direction substantially perpendicular to a longitudinal direction of the lines of the second electrode column.

Claims

1. A display device comprising:

a touch panel including a plurality of electrode columns, each electrode column including a plurality of electrodes positioned in the electrode column, the plurality of electrode columns including at least a first electrode column and a second electrode column that are adjacent to each other, the first electrode column and the second electrode column each including a first longitudinal edge and a second longitudinal edge where the second longitudinal edge of the first electrode column is adjacent to the first longitudinal edge of the second electrode column;

a plurality of lines, each line connected to a corresponding electrode included in a corresponding one of the plurality of electrode columns;

a display driving integrated circuit (IC) connected to the plurality of lines, the display driving IC for applying a touch scan signal to the plurality of electrodes of one or more electrode columns; and

a touch IC for receiving a plurality of touch sense signals that are generated based on the touch scan signal from the plurality of electrodes;

wherein lengths of the lines within the first electrode column increase as the lines within the first electrode column are positioned further from the first longitudinal edge of the first electrode column that is not adjacent to the first longitudinal edge of the second electrode column in a direction substantially perpendicular to a longitudinal direction of the lines of the first electrode column and towards the first longitudinal edge of the second electrode column;

wherein lengths of the lines within the second electrode column decrease as the lines within the second electrode column are positioned further from the first longitudinal edge of the second electrode column in a direction substantially perpendicular to a longitudinal direction of the lines of the second electrode column and towards the second longitudinal edge of the second electrode column;

wherein the touch IC determines a touch input based on the touch sense signals received from at least two adjacent electrodes in one of the electrode columns;

wherein a line with a longest length from the first electrode column is directly adjacent to a line with a longest length from the second electrode column to minimize a difference in capacitance between the line with the longest length from the first electrode column and the line with the longest length from the second electrode column.

2. The display device of claim 1, wherein each of the plurality of electrodes included in each electrode column is vertically arranged in the electrode column in a direction parallel to the plurality of lines connected to the electrode column and is vertically adjacent to at least one other electrode included in the electrode column.

3. The display device of claim 1, wherein within each of the plurality of electrode columns, the plurality of electrodes include a plurality of contact holes.

4. The display device of claim 3, wherein each of the plurality of electrodes within one of the electrode columns includes a contact hole that is horizontally positioned in the electrode at a substantially equal horizontal distance from a position of a contact hole included in at least one other electrode that is vertically adjacent to the electrode.

5. The display device of claim 3, wherein within each of the plurality of electrode columns, each of the plurality of lines is connected to an electrode via a contact hole included in the electrode.

6. The display device of claim 1, wherein the plurality of electrodes further include a third electrode column that is adjacent to the second electrode column and the third electrode column including a first longitudinal edge and a second longitudinal edge, the first longitudinal edge of the third electrode column adjacent to the second longitudinal edge of the second electrode column, and wherein lengths of lines within the third electrode column increase as the lines within the third electrode column are positioned further from the first longitudinal edge of the third electrode column in a direction substantially perpendicular to a longitudinal direction of the lines of the third electrode column.

7. The device of claim 1, wherein each of the plurality of electrodes of at least one of the electrode columns includes multiple contact holes.

8. The device of claim 1, wherein the plurality of electrode columns are disposed along a direction parallel to the plurality of lines.