Touch panel

• US 8,717,313 B2
• Filed: 08/02/2010
• Issued: 05/06/2014
• Est. Priority Date: 08/02/2010
• Status: Active Grant

• Current Assignee: E Ink Holdings Incorporated
• Original Assignee: E Ink Holdings Incorporated
• Inventors: Chuang, Kai-Cheng
• Primary Examiner(s): Chang, Kent
• Assistant Examiner(s): Lu, William
• Application Number:
  US12/848,996
• Publication Number:
  US 20120026125A1
• Time in Patent Office: 1,373 Days
• Field of Search: 345156-184
• US Class Current: 345/173
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A touch panel, operated by a magnetic stylus, including: a display panel, having a display plane and an interface plane, the interface plane underlying the display plane; and a sensing assembly, underlying the display panel, having a first conductive layer, a second conductive layer, and a plurality of insulating spacers, the first conductive layer underlying the interface plane, and the insulating spacers being placed between the first conductive layer and the second conductive layer to divide the first conductive layer and the second conductive layer into a plurality of first conductive segments and a plurality of second conductive segments respectively, wherein one of the second conductive segments will be bent upward by a magnetic force to electrically connect with one of the first conductive segments when the magnetic stylus is applied thereto.

Claims

1. A touch panel, operated by a magnetic stylus, comprising:

a display panel having a display plane and an interface plane, said interface plane is located under said display plane; and

a sensing assembly located under said display panel and having a first conductive layer, a second conductive layer, and a plurality of insulating spacers, said first conductive layer and said second conductive layer are each made of a metal selected from a group consisting of copper and aluminum, said first conductive layer directly engaging said interface plane of said display panel, and said plurality of insulating spacers being located between said first conductive layer and said second conductive layer and dividing said first conductive layer and said second conductive layer into a plurality of first conductive segments and a plurality of second conductive segments respectively, wherein, when said magnetic stylus is applied to said display panel, a single metal layer being a corresponding second conductive segment of said plurality of second conductive segments is bent upwardly by a magnetic force of said magnetic stylus and is electrically connected with a corresponding first conductive segment of said plurality of first conductive segments.

2. The touch panel according to claim 1, further comprising a controller, which is coupled with said display panel and said sensing assembly.

3. The touch panel according to claim 1, wherein said sensing assembly is a resistive touch sensing module.

4. The touch panel according to claim 1, wherein said display panel is an electronic paper display.

5. The touch panel according to claim 1, wherein said insulating spacers are made of plastics.

6. The touch panel according to claim 1, wherein, when said magnetic stylus is moved away from said corresponding second conductive segment, said corresponding second conductive segment is restored by gravity and an elastic force.

7. The touch panel according to claim 1, wherein, when said magnetic stylus is applied to said display panel, said corresponding second conductive segment of said plurality of second conductive segments is bent upwardly.

8. A touch panel, operated by a magnetic stylus, comprising:

a display panel having a display plane and an interface plane, said interface plane located under said display plane; and

a sensing assembly located under said display panel and having a first conductive layer, a second conductive layer, and a plurality of insulating spacers, said first conductive layer and said second conductive layer are each made of a metal selected from a group consisting of copper and aluminum, said first conductive layer directly engaging said interface plane of said display panel, and said plurality of insulating spacers being located between said first conductive layer and said second conductive layer and separating said first conductive layer and said second conductive layer, wherein a single metal layer being said second conductive layer is bent upwardly by a magnetic force of said stylus and is electrically connected with said first conductive layer when said magnetic stylus is applied to said touch panel.