HYBRID TOUCH PANEL DEVICE

• US 20120206401A1
• Filed: 01/23/2012
• Published: 08/16/2012
• Est. Priority Date: 02/15/2011
• Status: Abandoned Application

• Current Assignee: Howay Corp.
• Original Assignee: Howay Corp.
• Inventors: LIN, JAOCHING, CHU, LINABEL, LEE, WEN-TING, SHEN, CHUNG-YI
• Application Number:
  US13/355,597
• Publication Number:
  US 20120206401A1
• 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 3/0445 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 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A hybrid touch panel device includes a resistive touch panel and capacitive touch sensing panel having a single sensing electrode pattern. The resistive touch panel is operable to generate a press position signal in response to pressure detected thereby. The capacitive touch sensing panel is disposed on top of the resistive touch panel and is operable to generate a touch position signal in response to at least one touch action detected thereby.

Claims

1. A hybrid touch panel device comprising:

a resistive touch panel operable to generate a press position signal in response to pressure detected thereby; and

a capacitive touch sensing panel disposed on top of said resistive touch panel, including a single sensing electrode pattern, and operable to generate a touch position signal in response to at least one touch action detected thereby.

2. The hybrid touch panel device as claimed in claim 1, wherein said resistive touch panel includes, from bottom to top, a substrate, a first conductor layer, a spacer layer, a second conductor layer, and an insulating layer, which are arranged in a stack, said capacitive touch sensing panel being stacked on top of said insulating layer of said resistive touch panel.

3. The hybrid touch panel device as claimed in claim 1, wherein said capacitive touch sensing panel includes a substrate disposed on top of said resistive touch panel, and a protective layer disposed above said substrate, said single sensing electrode pattern of said capacitive touch sensing panel being formed between said substrate and said protective layer.

4. The hybrid touch panel device as claimed in claim 3, wherein said sensing electrode pattern includes a plurality of electrodes which are electrically isolated from each other and which have capacitances that vary according to the at least one touch action detected by said capacitive touch sensing panel.

5. The hybrid touch panel device as claimed in claim 3, wherein said protective layer is made of a material selected from the group consisting of glass, polymethylmethacrylate (PMMA), and polyethylene terephthalate (PET) plastic film.

6. The hybrid touch panel device as claimed in claim 3, wherein said substrate is an antioxidant layer.

7. The hybrid touch panel device as claimed in claim 4, further comprising a controller electrically coupled to said resistive touch panel and said capacitive touch sensing panel to receive the press position signal and the touch position signal therefrom, and operable to generate a control signal based on at least one of the press position signal and the touch position signal.

8. The hybrid touch panel device as claimed in claim 7, wherein said capacitive touch sensing panel further includes a plurality of conductive traces for electrically connecting said electrodes to said controller so as to transmit the touch position signal to said controller, said electrodes extending in a first direction and being arranged in pairs in a second direction transverse to the first direction, said electrodes in each of said pairs being symmetric in shape.

9. The hybrid touch panel device as claimed in claim 8, wherein said controller measures the variance in the capacitances in the first direction to obtain a first component of the touch position signal, and measures the variance in the capacitances in the second direction to obtain a second component of the touch position signal.

10. The hybrid touch panel device as claimed in claim 7, wherein said electrodes extend in a first direction, are arranged in a second direction transverse to the first direction, and have width dimensions that vary along the first direction.