MUTUAL CAPACITANCE TOUCH SCREEN AND COMBINED MUTUAL CAPACITANCE TOUCH SCREEN

• US 20100110038A1
• Filed: 10/26/2009
• Published: 05/06/2010
• Est. Priority Date: 10/31/2008
• Status: Abandoned Application

• Current Assignee: Jk Zhang, Michael Mo
• Original Assignee: Jk Zhang, Michael Mo
• Inventors: Mo, Michael, Zhang, JK
• Application Number:
  US12/605,581
• Publication Number:
  US 20100110038A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

A mutual capacitance touch screen and a combined mutual capacitance touch screen formed by the combination of mutual capacitance touch screens. A driving layer and a sensor layer are included, wherein the driving layer comprises driving electrodes distributed at intervals in the same plane; the sensor layer comprises sense electrodes distributed at intervals in the same plane; and the places where the sense electrodes are distributed in the sensor layer are just over against the intervals between the driving electrodes in the driving layer so that the driving electrodes and the sense electrodes together fill the touch area of the touch screen. The driving electrodes are not over against the sense electrodes in terms of space positions to increase the proportion of capacitance C_T to mutual capacitance C, wherein the capacitance C_T is formed between the driving electrodes and the top of the sense electrodes; consequently, the effective capacitivity of the mutual capacitance touch screen is effectively increased.

Claims

1. A mutual capacitance touch screen comprises a touch plane made of transparent insulating media, a driving layer and a sensor layer which are covered with the touch plane, and a capacitance medium plane which is made of transparent insulating media and is held between the driving layer and the sensor layer;

The mutual capacitance touch screen is characterized in that;

The driving layer comprises plate driving electrodes which are made of transparent conductive materials and distributed at intervals in the same plane;

the sensor layer comprises plate sense electrodes which are made of transparent conductive materials and distributed at intervals in the same plane; and

the places where the sense electrodes are distributed in the sensor layer are just over against the intervals between the driving electrodes in the driving layer so that the driving electrodes and the sense electrodes together fill the touch area of the touch plane;

The driving electrodes are electrically connected with peripheral excitation signal modules of the touch screen, and the sense electrodes are electrically connected with peripheral sense control modules of the touch screen.

2. The mutual capacitance touch screen according to claim 1 is characterized in that:

The touch screen also comprises a shielding layer which is arranged above or below the lower one of the driving layer and the sensor layer or is embedded in the lower layer;

The shielding layer comprises plate shielding electrodes made of transparent conductive materials and shielding electrode lead-out wires, wherein the shielding electrodes are just over against the areas occupied by the electrodes in the higher one of the driving layer and the sensor layer;

The shielding electrodes electrically hang;

or by the shielding electrode lead-out wires, all the shielding electrodes are earthed or are electrically connected with peripheral direct current sources of the touch screen.

3. The mutual capacitance touch screen according to claim 1 is characterized in that:

The touch screen also comprises a dummy electrode layer which is arranged above or below the higher one of the driving layer and the sensor layer or is embedded in the higher layer;

The dummy electrode layer comprises plate dummy electrodes made of transparent conductive materials, wherein the dummy electrodes are just over against the areas occupied by the electrodes in the lower one of the driving layer and the sensor layer.

4. The mutual capacitance touch screen according to claim 1 is characterized in that:

The touch screen also comprises driving electrode connecting wires, sense electrode connection lines, driving electrode lead-out wires and sense electrode lead-out wires, wherein the driving electrode connecting wires and the sense electrode connecting wires are made of transparent conductive materials;

The driving electrodes are grouped and connected in series by the driving electrode connecting wires, and the position relationships between the driving electrode connecting wires in the driving layer comprise collineation and parallelism;

the sense electrodes are grouped and connected in series by the sense electrode connecting wires, and the position relationships between the sense electrode connecting wires in the sensor layer comprise collineation and parallelism; and

the driving electrode connecting wires are perpendicular to the sense electrode connecting wires;

The driving electrode groups are electrically connected with the peripheral excitation signal modules of the touch screen by the driving electrode lead-out wires, and the sense electrode groups are electrically connected with the peripheral sense control modules of the touch screen by the sense electrode lead-out wires.

5. The mutual capacitance touch screen according to claim 1 is characterized in that:

Each driving electrode is a rectangular driving electrode, and each sense electrode is a rectangular sense electrode.

6. The mutual capacitance touch screen according to claim 1 is characterized in that:

Each driving electrode is a rhombic driving electrode, and each sense electrode is a rhombic sense electrode.

7. The mutual capacitance touch screen according to claim 1 is characterized in that:

Each driving electrode is a hexagonal driving electrode, and each sense electrode is a rhombic sense electrode.

8. A combined mutual capacitance touch screen comprises a touch panel made of transparent insulating media;

The combined touch screen is characterized in that;

The combined touch screen also comprises at least two mutual capacitance touch units which are covered with the touch panel and closely arranged, and the mutual capacitance touch units together fill the touch area of the touch panel;

Each mutual capacitance touch unit comprises a driving layer, a sensor layer and a capacitance medium plane which is made of transparent insulating media and is held between the driving layer and the sensor layer;

The driving layer comprises plate driving electrodes which are made of transparent conductive materials and distributed at intervals in the same plane;

the sensor layer comprises plate sense electrodes made of transparent conductive materials in the same plane; and

the places where the sense electrodes are distributed in the sensor layer are just over against the intervals between the driving electrodes in the driving layer so that the driving electrodes and the sense electrodes together fill the touch area of the mutual capacitance touch unit where the driving electrodes and the sense electrodes are placed;

The driving electrodes are electrically connected with peripheral excitation signal modules of the combined mutual capacitance touch screen, which are corresponding to the mutual capacitance touch unit where the driving electrodes are placed; and

the sense electrodes are electrically connected with peripheral sense control modules of the combined mutual capacitance touch screen, which are corresponding to the mutual capacitance touch unit where the sense electrodes are placed.

9. The combined mutual capacitance touch screen according to claim 8 is characterized in that:

The combined mutual capacitance touch screen also comprises shielding layer connecting wires made of transparent conductive materials and shielding layer lead-out wires;

Each mutual capacitance touch unit also comprises a shielding layer which is arranged above or below the lower one of the driving layer and the sensor layer or is embedded in the lower layer;

The shielding layer comprises plate shielding electrodes made of transparent conductive materials and shielding electrode lead-out wires;

the shielding electrodes are just over against the areas occupied by the electrodes in the higher one of the driving layer and the sensor layer;

The shielding electrodes electrically hang;

or the shielding layers of the mutual capacitance touch units are electrically connected together by the shielding layer connecting wires and are earthed through the shielding layer lead-out wires or are electrically connected with peripheral direct current sources of the combined mutual capacitance touch screen;

or by the shielding electrode lead-out wires, the shielding electrodes of the mutual capacitance touch units are earthed or are electrically connected with the peripheral direct current sources of the combined mutual capacitance touch screen.

10. The combined mutual capacitance touch screen according to claim 8 is characterized in that:

Each mutual capacitance touch unit also comprises a dummy electrode layer which is arranged above or below the higher one of the driving layer and the sensor layer or is embedded in the higher layer;

The dummy electrode layer comprises plate dummy electrodes made of transparent conductive materials, wherein the dummy electrodes are just over against the areas occupied by the electrodes in the lower one of the driving layer and the sensor layer.