Dual-Mode Touch Sensing Apparatus

• US 20130181937A1
• Filed: 07/02/2012
• Published: 07/18/2013
• Est. Priority Date: 01/18/2012
• Status: Active Grant

• Current Assignee: Chunghwa Picture Tubes Limited (Tatung Co., Ltd.)
• Original Assignee: Chunghwa Picture Tubes Limited (Tatung Co., Ltd.)
• Inventors: WENG, Ming-Chi, CHEN, Yen-Ting, CHIU, Kun-Chi
• Granted Patent: US 8,743,086 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04106 Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
• 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

The present invention provides a dual-mode touch sensing apparatus. The dual-mode touch sensing apparatus includes a substrate, a first touch sensing electrode formed on the substrate and a second touch sensing electrode formed on the substrate. The first touch sensing electrode is used to perform the capacitive touch sensing technology. The second touch sensing electrode is used to perform the electromagnetic touch sensing technology.

Claims

1. A dual-mode touch sensing apparatus, comprising:

a substrate;

a first touch sensing electrode formed on the substrate, wherein the first touch sensing electrode is used to perform a first type of touch sensing technology for sensing a touch position; and

a second touch sensing electrode formed on the substrate, wherein the second touch sensing electrode is used to perform a second type of touch sensing technology for sensing a touch position,

wherein the first type touch sensing technology is the capacitive touch sensing technology, and the second type touch sensing technology is the electromagnetic touch sensing technology.

2. The dual-mode touch sensing apparatus of claim 1, wherein the first touch sensing electrode is a projected capacitive touch sensing electrode and is formed on a first surface of the substrate, and the second touch sensing electrode is an electromagnetic touch sensing antenna and is formed on a second surface of the substrate.

3. The dual-mode touch sensing apparatus of claim 2 wherein the electromagnetic touch sensing antenna further comprises:

a first-direction antenna loop located on the second surface of the substrate, wherein the first-direction antenna loop further comprises a plurality of “

”

shaped first antenna segments, wherein two adjacent “

”

shaped first antenna segments belong to different sensing loop;

an insulation layer located on the first-direction antenna loop; and

a second-direction antenna loop located on the insulation layer, wherein the second-direction antenna loop further comprises a plurality of “

”

shaped second antenna segments, wherein two adjacent “

”

shaped second antenna segments belong to different sensing loop.

4. The dual-mode touch sensing apparatus of claim 2, further comprising a switch circuit coupled with the electromagnetic touch sensing antenna, and when the projected capacitive touch sensing electrode is operated, the switch circuit is turned off to stop an operation of the electromagnetic touch sensing antenna.

5. The dual-mode touch sensing apparatus of claim 2, wherein the projected capacitive touch sensing electrode further comprises:

a first-direction sensing electrode layer located on the first surface of the substrate, wherein the first-direction sensing electrode layer further comprises a plurality of first electrode strings which are arranged in parallel along a first direction, each of the first electrode strings including a plurality of first rhombus-shaped electrodes arranged in series;

an insulation layer located on the first-direction sensing electrode layer; and

a second-direction sensing electrode layer located on the insulation layer, wherein the second-direction sensing electrode layer further comprises a plurality of second electrode strings which are arranged in parallel along a second direction, each of the second electrode strings including a plurality of second rhombus-shaped electrodes arranged in series, wherein the first rhombus-shaped electrodes and the second rhombus-shaped electrodes are alternately arranged.

6. The dual-mode touch sensing apparatus of claim 5 wherein the electromagnetic touch sensing antenna further comprises:

a first-direction antenna loop located on the second surface of the substrate, wherein the first-direction antenna loop further comprises a plurality of “

”

shaped first antenna segments, wherein two adjacent “

”

shaped first antenna segments belong to different sensing loop;

an insulation layer located on the first-direction antenna loop; and

a second-direction antenna loop located on the insulation layer, wherein the second-direction antenna loop further comprises a plurality of “

”

shaped second antenna segments, wherein two adjacent “

”

shaped second antenna segments belong to different sensing loop.

7. The dual-mode touch sensing apparatus of claim 1, wherein the first touch sensing electrode is a projected capacitive touch sensing electrode and is formed on a first surface of the substrate, and the second touch sensing electrode is an electromagnetic touch sensing antenna and is formed on the first surface and a second surface of the substrate.

8. The dual-mode touch sensing apparatus of claim 7, wherein the electromagnetic touch sensing antenna further comprises:

a first-direction antenna loop located on the second surface of the substrate, wherein the first-direction antenna loop further comprises a plurality of first antenna segments, wherein two adjacent first antenna segments belong to different sensing loop;

a second insulation layer located on the first-direction antenna loop; and

a second-direction antenna loop located on the first surface, wherein the second-direction antenna loop further comprises a plurality of second sawtooth shaped antenna segments, each of the sawtooth shaped antenna segments surrounding the first electrode string corresponding to the first direction.

9. The dual-mode touch sensing apparatus of claim 7, wherein the electromagnetic touch sensing antenna further comprises:

a second-direction antenna loop located on the second surface, wherein the second-direction antenna loop further comprises a plurality of second antenna segments, wherein two adjacent second antenna segments belong to different sensing loop;

a second insulation layer located on the second-direction antenna loop; and

a first-direction antenna loop located on the first insulation layer, wherein the first-direction antenna loop further comprises a plurality of sawtooth shaped antenna segments, each of the sawtooth shaped antenna segments surrounding the second electrode string corresponding to the second direction.

10. The dual-mode touch sensing apparatus of claim 7, wherein the projected capacitive touch sensing electrode further comprises:

a first-direction sensing electrode layer located on the first surface of the substrate, wherein the first-direction sensing electrode layer further comprises a plurality of first electrode strings which are arranged in parallel along a first direction, each of the first electrode strings includes a plurality of first rhombus-shaped electrodes arranged in series;

a first insulation layer located on the first-direction sensing electrode layer; and

a second-direction sensing electrode layer located on the insulation layer, wherein the second-direction sensing electrode layer further comprises a plurality of second electrode strings which are arranged in parallel along a second direction, each of the second electrode strings including a plurality of second rhombus-shaped electrodes arranged in series, wherein the first rhombus-shaped electrodes and the second rhombus-shaped electrodes are alternately arranged.

11. The dual-mode touch sensing apparatus of claim 10, wherein the electromagnetic touch sensing antenna further comprises:

a first-direction antenna loop located on the second surface of the substrate, wherein the first-direction antenna loop further comprises a plurality of first antenna segments, wherein two adjacent first antenna segments belong to different sensing loop;

a second insulation layer located on the first-direction antenna loop; and

a second-direction antenna loop located on the first surface, wherein the second-direction antenna loop further comprises a plurality of second sawtooth shaped antenna segments, each of the sawtooth shaped antenna segments surrounding the first electrode string corresponding to the first direction.

12. The dual-mode touch sensing apparatus of claim 10, wherein the electromagnetic touch sensing antenna further comprises:

a second-direction antenna loop located on the second surface, wherein the second-direction antenna loop further comprises a plurality of second antenna segments, wherein two adjacent second antenna segments belong to different sensing loop;

a second insulation layer located on the second-direction antenna loop; and

a first-direction antenna loop located on the first insulation layer, wherein the first-direction antenna loop, further comprises a plurality of sawtooth shaped antenna segments, each of the sawtooth shaped antenna segments surrounding the second electrode string corresponding to the second direction.