TOUCH PANEL

• US 20130155006A1
• Filed: 08/13/2012
• Published: 06/20/2013
• Est. Priority Date: 12/16/2011
• Status: Active Grant

• Current Assignee: E Ink Holdings Incorporated
• Original Assignee: E Ink Holdings Incorporated
• Inventors: Syu, Suei-Shih, Li, Pei-Sheng
• Granted Patent: US 8,780,081 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/046 by electromagnetic means

Abstract

A touch panel includes a substrate, plural first coils, plural second coils, plural sensing pads, plural connection lines, and a control circuit. The first coils, the second coils, the sensing pads and the connection lines are configured on the substrate. Each first coil has a first connection portion and a first coil portion connected to the first connection portion and extending along a first direction. Each second coil has a second connection portion and a second coil portion connected to the second connection portion and extending along a second direction. Plural overlapping regions are defined by areas occupied by the first coil portions and the second coil portions on the substrate, and the sensing pads are located in the overlapping regions. The connection lines are respectively connected to the sending pads. The connection lines, the first connection portions and the second connection portions are connected to the control circuit.

Claims

1. A touch panel, comprising:

a substrate;

a plurality of first coils, configured on the substrate, and each first coil comprising a first connection portion and a first coil portion connected to the first connection portion and extending along a first direction, wherein areas occupied by any two neighboring first coil portions on the substrate are partially overlapped;

a plurality of second coils, configured on the substrate, and each second coil comprising a second connection portion and a second coil portion connected to the second connection portion and extending along a second direction, wherein the first direction intersects the second direction, and areas occupied by any two neighboring second coil portions on the substrate are partially overlapped;

a plurality of sensing pads, configured on the substrate, wherein a plurality of overlapping regions is defined by areas occupied by the first coil portions and the second coil portions on the substrate, and the sensing pads are located in the overlapping regions;

a plurality of connection lines, configured on the substrate, and respectively connected to the sensing pads; and

a control circuit, wherein the connection lines, the first connection portions of the first coils, and the second connection portions of the second coils are connected to the control circuit.

2. The touch panel according to claim 1, wherein a shape of the first coil portions and the second coil portions comprises rectangle or circle.

3. The touch panel according to claim 1, wherein a shape of the sensing pad comprises rectangle, circle, rhomboid, or triangle.

4. The touch panel according to claim 1, wherein the control circuit comprises:

a driving circuit;

a comparing circuit, coupled to the driving circuit;

a converting circuit, coupled to the comparing circuit; and

a processor, coupled to the converting circuit and the driving circuit.

5. The touch panel according to claim 4, wherein the comparing circuit at least comprises a capacitance comparator and an electromagnetic comparator.

6. The touch panel according to claim 1, wherein the sensing pads comprise a plurality of first sensing pads and a plurality of second sensing pads, the connection lines comprise a plurality of first connection lines and a plurality of second connection lines, each first connection line serially connects the first sensing pads along the first direction, and each second connection line serially connects the second sensing pads along the second direction.

7. The touch panel according to claim 1, wherein a material of the substrate comprises acryl, polycarbonate (PC), polyethylene terephthalate (PET), or polyimide (PI).

8. The touch panel according to claim 1, wherein a material of the first coils and the second coils comprises copper, iron, silver, or carbon nano-tube.

9. The touch panel according to claim 1, wherein a material of the sensing pads comprises copper, iron, silver, or carbon nano-tube.

10. The touch panel according to claim 1, wherein a material of the connection lines comprises copper, iron, silver, or carbon nano-tube.