Touch sensing panel and touch sensing control unit thereof

• US 9,471,175 B2
• Filed: 09/26/2014
• Issued: 10/18/2016
• Est. Priority Date: 07/18/2014
• Status: Expired due to Fees

• Current Assignee: Chunghwa Picture Tubes Limited
• Original Assignee: Chunghwa Picture Tubes Limited
• Inventors: Kuo, De-Wei, Liao, Jhen-Shen, Chen, Hung-Hsiang
• Primary Examiner(s): Pervan, Michael
• Application Number:
  US14/497,348
• Publication Number:
  US 20160018915A1
• Time in Patent Office: 753 Days
• Field of Search: 178 1801- 1907, 345173-178
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04108 Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/0346 with detection of the device orientation or free movement in a 3D space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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

Abstract

A touch sensing panel including a substrate, an electrode array, and a plurality of third electrodes is provided. The substrate has an active area and a peripheral area. The electrode array is located at the active area and includes a plurality of first electrodes and a plurality of second electrodes, wherein the second electrodes and the first electrodes are electrically insulated to each other and intersected with each other. The third electrodes area located at different sides of the peripheral area, respectively, and electrically insulated to the electrode array. A touch sensing control unit applied to the touch sensing panel is also provided.

Claims

1. A touch sensing panel, comprising:

a substrate having an active area and a peripheral area;

an electrode array located at the active area and comprising a plurality of first electrodes and a plurality of second electrodes, wherein the second electrodes and the first electrodes are electrically insulated to each other and intersected with each other;

a plurality of third electrodes located at different sides of the peripheral area respectively, and electrically insulated to the electrode array; and

a fourth electrode at least located at the active area, the fourth electrode electrically insulated to the electrode array and the third electrodes, and the fourth electrode and the electrode array disposed on two opposite sides of the substrate respectively, wherein the touch sensing panel comprises a contact mode and a non-contact mode, in the contact mode, one of the first electrodes and the second electrodes are contact driving electrodes, and the other one of the first electrodes and the second electrodes are contact sensing electrodes, in the non-contact mode, the fourth electrode is a non-contact driving electrode, and the third electrodes are non-contact sensing electrodes.

2. The touch sensing panel as claimed in claim 1, wherein the electrode array and the third electrodes are disposed on the same side of the substrate.

3. The touch sensing panel as claimed in claim 1, wherein the electrode array and the third electrodes are disposed on two opposite sides of the substrate respectively.

4. The touch sensing panel as claimed in claim 1, wherein the fourth electrode is disposed on one side of the substrate opposite to the electrode array and the third electrodes.

5. The touch sensing panel as claimed in claim 1, wherein the fourth electrode is a mesh electrode, and an orthogonal projection of the fourth electrode on the substrate is overlapped with orthogonal projections of the first electrodes, the second electrodes and the third electrodes on the substrate.

6. The touch sensing panel as claimed in claim 1, further comprising an insulating layer, wherein the first electrodes and the second electrodes are electrically insulated to each other through the insulating layer.

7. The touch sensing panel as claimed in claim 6, wherein the insulating layer comprises a plurality of island-shaped insulating patterns disposed at intersections of the first electrodes and the second electrodes, or the insulating layer is a continuous insulating thin film located between the first electrodes and the second electrodes.

8. The touch sensing panel as claimed in claim 1, wherein each of the first electrodes and each of the second electrodes are strip electrodes respectively.

9. The touch sensing panel as claimed in claim 1, wherein each of the first electrodes comprises a plurality of first electrode pads and a plurality of first connecting portions, each of the first connecting portions connects the two adjacent first electrode pads in series, each of the second electrodes comprises a plurality of second electrode pads and a plurality of second connecting portions, each of the second connecting portions connects the two adjacent second electrode pads in series.

10. A touch sensing control unit applied to the touch sensing panel as claimed in claim 1, comprising:

a drive control unit, comprising;

a contact driving unit configured for providing a contact driving signal to each of the contact driving electrodes; and

a non-contact driving unit configured for providing a non-contact driving signal to the non-contact driving electrode; and

a signal processing unit configured for receiving signals from the contact sensing electrodes and the non-contact sensing electrodes, to determine a touch sensing information of a target.