TOUCH SCREEN

• US 20120081331A1
• Filed: 06/22/2011
• Published: 04/05/2012
• Est. Priority Date: 09/30/2010
• Status: Abandoned Application

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Chae, Kyoung Soo, Lee, Hee Bum, Oh, Yong Soo, Lee, Jong Young
• Application Number:
  US13/166,558
• Publication Number:
  US 20120081331A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

Disclosed herein is a touch screen. The touch screen includes: a transparent substrate; and transparent electrodes formed on the transparent substrate and sensing a change in capacitance at the time of a touch input, wherein the transparent electrodes include internal transparent electrodes and external transparent electrodes, and the internal transparent electrodes include first sensing units sensing the change in capacitance, extending portions extending to edges of the transparent substrate from the first sensing units, and the extending portions of the adjacent internal transparent electrodes face each other, whereby the extending portions face each other to reduce the frequency of the coordinate errors of the touch input corrected in the controller.

Claims

1. A touch screen, comprising:

a transparent substrate; and

transparent electrodes formed on the transparent substrate and sensing a change in capacitance at the time of a touch input,

wherein the transparent electrodes include internal transparent electrodes and external transparent electrodes, and the internal transparent electrodes include first sensing units sensing the change in capacitance, extending portions extending to edges of the transparent substrate from the first sensing units, and the extending portions of the adjacent internal transparent electrodes face each other.

2. The touch screen as set forth in claim 1, further comprising:

an adhesive layer formed on the transparent substrate on which the transparent electrodes are formed; and

a window panel bonded to the transparent substrate through the adhesive layer.

3. The touch screen as set forth in claim 1, wherein the external transparent electrodes further include second sensing units sensing a change in capacitance.

4. The touch screen as set forth in claim 1, wherein the transparent electrodes are made of a conductive polymer.

5. The touch screen as set forth in claim 1, further comprising first electrodes formed at edges of the transparent substrate and connected to the extending portions of the internal transparent electrodes.

6. The touch screen as set forth in claim 1, further comprising second electrodes formed at edges of the transparent substrate and connected to the external transparent electrodes.

7. The touch screen as set forth in claim 1, wherein the extending portions of the internal transparent electrodes extend between the external transparent electrodes.