Compound touch panel

• US 20080231605A1
• Filed: 03/21/2007
• Published: 09/25/2008
• Est. Priority Date: 03/21/2007
• Status: Abandoned Application

• Current Assignee: Young Fast Optoelectronics Company Limited
• Original Assignee: Young Fast Optoelectronics Company Limited
• Inventors: Yang, Kai-Ti
• Application Number:
  US11/726,046
• Publication Number:
  US 20080231605A1
• Time in Patent Office: Days
• US Class Current: 345/173
• 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 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A compound touch panel comprises a capacitive touch panel unit; a resistive touch panel unit and a signal processing unit; the capacitive touch panel unit is overlapped with the resistive touch panel unit; sensing signals from the capacitive touch panel unit and resistive touch panel unit being transferred to the signal processing unit; the signal processing unit having at least one signal determining loop for determining the sensing signals being from the capacitive touch panel unit or the resistive touch panel unit so as to select a predetermined signal processing mode. Or the signal processing unit having a manual operated signal switch for selecting a signal processing mode based on whether sensing signals are from the capacitive touch panel unit or resistive touch panel unit. When the capacitive touch panel unit is selected from receiving signals, the conductive films of the resistive touch panel unit are jumped for grounding.

Claims

1. A compound touch panel comprising:

a first touch panel unit having

a panel made of flexible highly transparent insulated thin film;

a first axis sensing layer being a transparent film with good conductivity;

the first axis sensing layer having a plurality of first axis sensing traces;

ends of each trace having respective joints;

an insulation layer being a transparent insulated film layer;

a second axis sensing layer being a transparent film with good conductivity;

the second axis sensing layer having a plurality of second axis sensing traces;

ends of each trace having respective joints;

a bottom plate being a flexible highly transparent insulated film; and

a first signal output wire bank having a plurality of conductive paths;

wherein the panel, the first axis sensing layer, the second axis sensing layer, the bottom plate and the first signal output wire bank are glued together sequentially as a transparent plate like body;

the first axis sensing traces and second axis sensing traces are arranged along different directions so as to form as a matrix;

the joints of the first axis sensing layer and second axis sensing layer are connected to silver conductive wires at edges of the bottom plates and are connected to the first signal output wire bank so that signals from the first axis sensing layer and second axis sensing layer are transferred to a signal processing unit through the first signal output wire bank;

a second touch panel unit having;

a top plate being a flexible highly transparent insulated film;

an upper conductive film installed with electronic nodes and being a transparent film with good conductivity;

a lower conductive film installed with electronic nodes and being a transparent film with good conductivity;

a substrate being a transparent insulated plate; and

a second signal output wire bank having a plurality of conductive paths thereon; and

wherein the upper conductive film is installed on a bottom surface of the top plate and the lower conductive film is installed on an upper surface of the substrate;

a plurality of spacing balls are installed between the upper conductive film and the lower conductive film so as to form a gap therebetween;

edges of the upper conductive film and lower conductive film are formed with insulated gluing layers for gluing the two layers as a transparent plate;

signals from the upper conductive film and lower conductive film are collected by the silver conductive wires at the edges of the upper conductive film and lower conductive film and then are transferred to the signal processing unit through the second signal output wire bank for further processing; and

wherein the first touch panel unit is a capacitive touch panel unit and the second touch panel unit is a resistive touch panel unit;

the first touch panel unit is overlapped with the second touch panel unit as a plate structure.

2. The compound touch panel as claimed in claim 1, wherein the second touch panel unit is installed below the first touch panel unit.

3. The compound touch panel as claimed in claim 1, wherein the bottom plate of the first touch panel unit is also used as the top plate of the second touch panel unit.

4. The compound touch panel as claimed in claim 1, wherein a surface of the panel is coated with a layer of hard coat so as to increase the anti-crack and anti-dust ability on the surface.

5. A compound touch panel comprising a capacitive touch panel unit;

a resistive touch panel unit and a signal processing unit;

the capacitive touch panel unit is overlapped with the resistive touch panel unit;

sensing signals from the capacitive touch panel unit and resistive touch panel unit are transferred to the signal processing unit;

the signal processing unit having at least one signal determining loop for determining the sensing signals being from the capacitive touch panel unit or the resistive touch panel unit so as to select a predetermined signal processing mode for further processing.

6. The compound touch panel as claimed in claim 5, wherein when the signal processing mode is selected to receive the sensing signals from the capacitive touch panel unit, the upper conductive film and lower conductive film of the resistive touch panel unit are jumped as grounding of the capacitive touch panel unit.

7. A compound touch panel comprising a capacitive touch panel unit;

a resistive touch panel unit and a signal processing unit;

the capacitive touch panel unit is overlapped with the resistive touch panel unit;

sensing signals from the capacitive touch panel unit and resistive touch panel unit are transferred to the signal processing unit;

the signal processing unit having at least one manual operated signal switch for selecting a signal processing mode based on whether sensing signals are from the capacitive touch panel unit or resistive touch panel unit.

8. The compound touch panel as claimed in claim 7, wherein when the signal processing mode is selected to receive the sensing signals from the capacitive touch panel unit, the upper conductive film and lower conductive film of the resistive touch panel unit are jumped as grounding of the capacitive touch panel unit.