PROJECTED CAPACITIVE TOUCH PANEL

• US 20110147192A1
• Filed: 12/13/2010
• Published: 06/23/2011
• Est. Priority Date: 12/18/2009
• Status: Abandoned Application

• Current Assignee: Derlead Investment, Ltd.
• Original Assignee: Derlead Investment, Ltd.
• Inventors: HSU, Jane
• Application Number:
  US12/965,957
• Publication Number:
  US 20110147192A1
• Time in Patent Office: Days
• US Class Current: 200/600
• 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: H03K 2217/960755 Constructional details of capacitive touch and proximity switches

Abstract

A projected capacitive touch panel has an upper substrate and a lower substrate. The upper substrate has multiple upper conducting layers, and each upper conducting layer has multiple upper sensor units serially connected. The upper substrate further has an insulating ink layer being non-transparent, formed on a perimeter of the bottom of the upper substrate, covering an edge of the upper sensor unit located on one end of each upper conducting layer in a direction, overlapping with the lower ports and the lower wires of the lower substrate, and having multiple reserved slots, each formed through a portion of the insulating ink layer overlapping with a corresponding upper sensor unit, and multiple conductors, each mounted in a corresponding reserved slot. The insulating ink layer masks the wires and ports on the lower and upper substrates, thereby eliminating the use of a masking cover, saving the cost and thinning the product.

Claims

1. A projected capacitive touch panel, comprising:

an insulating layer having a recess formed in one edge thereof;

a flexible printed circuit board mounted in the recess of the insulating layer;

a lower substrate mounted on bottoms of the insulating layer and the flexible printed circuit board, and having;

an electromagnetic shielding layer formed on a bottom of the lower substrate;

multiple lower conducting layers parallelly formed on a top of the lower substrate, and aligning in a first direction, each lower conducting layer having multiple lower sensor units serially connected;

multiple lower ports, each lower port formed on one side of one of the lower conducting layers; and

multiple lower wires formed on the top of the lower substrate, and being equal to the lower ports in number, wherein one end of each lower wire is connected to one of the lower ports, and the other end of the lower wire is connected to the flexible printed circuit board; and

an upper substrate mounted on tops of the insulating layer and the flexible, and having;

multiple upper conducting layers parallelly formed on a bottom of the upper substrate, and aligning in a second direction perpendicular to the first direction, each upper conducting layer having multiple upper sensor units serially connected;

an insulating ink layer being non-transparent, formed on a perimeter of the bottom of the upper substrate, covering an edge of the upper sensor unit located on one end of each upper conducting layer in the second direction, overlapping with the lower ports and the lower wires of the lower substrate, and having;

multiple reserved slots, each reserved slot formed through a portion of the insulating ink layer overlapping with a corresponding upper sensor unit; and

multiple conductors, each conductor mounted in a corresponding reserved slot;

multiple upper ports, each upper port formed on a bottom of a corresponding conductor; and

multiple upper wires formed on a bottom of the insulating ink layer, and being equal to the upper ports in number, wherein one end of each upper wire is connected to a corresponding upper port, and the other end of the upper wire is connected to the flexible printed circuit board.

2. The projected capacitive touch panel as claimed in claim 1, wherein the upper wires and the lower wires are silver wires.

3. The projected capacitive touch panel as claimed in claim 1, wherein the electromagnetic shielding layer is formed by indium tin oxide.

4. The projected capacitive touch panel as claimed in claim 2, wherein the electromagnetic shielding layer is formed by indium tin oxide.

5. The projected capacitive touch panel as claimed in claim 1, wherein the upper sensor units of the upper conducting layer and the lower sensor units of the lower conducting layer are formed by indium tin oxide.

6. The projected capacitive touch panel as claimed in claim 2, wherein the upper sensor units of the upper conducting layer and the lower sensor units of the lower conducting layer are formed by indium tin oxide.

7. The projected capacitive touch panel as claimed in claim 3, wherein the upper sensor units of the upper conducting layer and the lower sensor units of the lower conducting layer are formed by indium tin oxide.

8. The projected capacitive touch panel as claimed in claim 4, wherein the upper sensor units of the upper conducting layer and the lower sensor units of the lower conducting layer are formed by indium tin oxide.