CN101989158A - Capacitive touch panel - Google Patents

Abstract

The invention provides a capacitive touch panel. The capacitive touch panel includes a substrate, a touch sensing area and a wiring area. The touch sensing area is formed on the substrate, which includes a plurality of touch sensing electrodes. The wiring area is adjacent to the touch sensing area, and includes wires and a covering layer covering the wiring area. The covering layer includes a contact hole, and the touch sensing electrode extends to the wiring area and is electrically connected to the wire through the contact hole. The edge control of the capacitive touch panel of the present invention is more accurate.

Description

capacitive touch panel

technical field

The invention relates to a capacitive touch panel, in particular to a capacitive touch panel with relatively accurate touch at the edge.

Background technique

In today's various consumer electronics markets, portable electronic products such as personal digital assistants (PDAs), mobile phones (mobile phones), and notebooks (notebooks) have gradually been used in personal computers and digital home appliance systems. A touch panel is used as a data communication interface tool between a user and an electronic device. When using the touch panel, the user can directly operate and issue instructions through the objects displayed on the panel, thus providing a more humanized operation interface for the user. In addition, the design of electronic products is light, thin, short, and small. In terms of product design, it is hoped to save the installation space of traditional input devices such as buttons, keyboards, and mice. Therefore, display devices with touch panels have gradually become One of the key components of various electronic products.

Existing touch panels can be classified into capacitive, resistive or wave touch panels according to their detection methods, each of which has different advantages and disadvantages and applicable fields. Resistive touch panels are usually composed of two sets of upper and lower transparent conductive films. When the user presses and touches, the upper and lower electrodes are turned on, and the voltage of the touch point can be calculated by measuring the voltage change. Location. For a wave touch panel, a wave source, usually infrared or ultrasonic, is set on one side of the X-axis and Y-axis of the panel, and a receiving source is set on the other side. When the user touches, the waveform is affected Interference, the interference pattern is perceived by the receiving source and the touch position can be calculated. The capacitive touch panel usually provides a uniform electric field at the four corners of the panel, and uses the capacitance change caused by the user's touch to detect the input coordinates. Generally, the capacitive touch panel is widely used in various electronic portable products due to its advantages of dustproof, high temperature resistance, and multi-touch capability.

In order to accurately determine the touch position, the capacitive touch panel usually needs enough sensing electrodes at the sensing touch position, but the capacitive touch panel in the prior art is usually unable to arrange the sensing electrodes at the edge due to graphic design reasons. Integrity, resulting in dead angles at the corresponding edges, so that the corresponding edges cannot sense touch. For commonly used application software (such as windows or office, etc.), the window closing, zooming in and out or the dragging keys of page up and down are all designed in the upper right corner or edge of the window, which usually causes great inconvenience in operation.

Contents of the invention

The purpose of the present invention is to provide a capacitive touch panel with relatively accurate touch at the edge.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions.

A capacitive touch panel includes a substrate, a touch sensing area and a wiring area. The touch sensing area is formed on the substrate, which includes a plurality of touch sensing electrodes. The wiring area is adjacent to the touch sensing area, and includes wires and a covering layer covering the wiring area. The covering layer includes a contact hole, and the touch sensing electrode extends to the wiring area and is electrically connected to the wire through the contact hole.

The shape of the outwardly extending touch sensing electrodes can be one-dimensional, two-dimensional or multi-dimensional.

The ratio of the area of each touch sensing electrode extending outward to the area of each touch sensing electrode in the touch sensing area ranges from 0 to 100%, and a preferred area ratio is 50%.

The shape of the outwardly extending touch sensing electrodes is rectangle, rhombus, circle or polygon. If it is a polygon, it is more preferably a regular polygon.

In the present invention, the shape of the touch sensing electrodes on the edge of the capacitive touch panel is designed to extend outward, so that the touch sensing electrodes at the edge can accurately sense the touch operation at the edge, thereby eliminating the touch operation at the edge. Control induction dead angle. This action brings more convenience to the operation of many application software (such as windows or office, etc.).

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic plan view of a capacitive touch panel according to a first embodiment of the present invention.

FIG. 2 is a schematic side view of the capacitive touch panel shown in FIG. 1 .

FIG. 3 is a schematic plan view of a capacitive touch panel according to a second embodiment of the present invention.

4 is a schematic plan view of a capacitive touch panel according to a third embodiment of the present invention

5 is a schematic plan view of a capacitive touch panel according to a fourth embodiment of the present invention

Detailed ways

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the capacitive touch panel proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. , as detailed below.

Please refer to FIGS. 1 and 2 . FIG. 1 is a schematic plan view of a capacitive touch panel 1 according to a first embodiment of the present invention, and FIG. 2 is a schematic side view of the capacitive touch panel 1 shown in FIG. 1 .

The capacitive touch panel 1 according to the first embodiment of the present invention mainly includes a substrate 100 , a touch sensing area 10 and a wiring area 11 . The substrate 100 is generally a hard transparent plate, such as a transparent glass plate, an acrylic plate, and the like. The touch sensing area 10 is formed on the substrate 100 and its function is mainly to detect the coordinates of the touched position.

The touch sensing area 10 is distributed with a plurality of touch sensing electrodes 102 , and the capacitive touch panel 1 mainly relies on these touch sensing electrodes 102 to determine the position of the touch point. The wiring area 11 is located at the peripheral position of the substrate 100 and is adjacent to the touch sensing area 10, and a plurality of metal wires 114 and a cover layer 116 covering the metal wires 114 are distributed thereon, and the cover layer 116 is generally an insulating material. .

The touch sensing electrodes 102 in the touch sensing area 10 are evenly arranged, and the touch sensing electrodes 102 located at the edge of the touch sensing area 10 extend into the wiring area 11 . In this embodiment, the shape of the touch sensing electrodes 102 extending into the wiring area 11 is diamond-shaped, and the area of each touch sensing electrode 102 extending outward is smaller than that of each touch sensing electrode 102 in the touch sensing area 10 . The area of the electrode 102.

The covering layer 116 covers the surface of the wiring region 11 and includes one or more contact holes 115 penetrating through the covering layer 116 . The metal wire 114 located in the wiring area 11 and covered by the covering layer 116 passes through the contact hole 116 and is electrically connected to the outwardly extending touch sensing electrode 102 , so as to transmit a voltage forming a uniform electric field.

In this embodiment, the shape of the touch sensing electrodes 102 at the edge of the capacitive touch panel 1 is designed to extend outward, so that the touch sensing electrodes 102 at the edge can accurately sense the touch operation at the edge, thereby Eliminates touch-sensing dead spots at the edges. This action brings more convenience to the operation of many application software (such as windows or office, etc.).

Please refer to FIG. 3 , the capacitive touch panel 2 of the second embodiment of the present invention is similar in structure to the capacitive touch panel 1 of the first embodiment, the main difference is that the capacitive touch panel of the second embodiment The shape of the touch sensing electrodes 202 extending into the wiring area 21 in the panel 2 is rectangular, and the area of each touch sensing electrode 202 extending outward is larger than the area of each touch sensing electrode 202 in the touch sensing area 20 . It should be noted that the capacitive touch panel 2 of the present invention is not limited to that described in this embodiment. For example, the area of each touch sensing electrode 202 extending outward may also be equal to the area of each touch sensing electrode 202 in the touch sensing area 20. The area of the touch sensing electrodes 202, that is, the ratio of the area of each touch sensing electrode 202 extending outward to the area of each touch sensing electrode 202 in the touch sensing area 20 ranges from 0 to 100%, one of which is preferably The area ratio is 50%.

Please refer to FIG. 4 , the capacitive touch panel 3 of the third embodiment of the present invention is similar in structure to the capacitive touch panel 1 of the first embodiment, the main difference is that the capacitive touch panel of the third embodiment The shape of the touch sensing electrodes 302 extending into the wiring area 31 in the panel 3 is circular.

Please refer to FIG. 5 , the capacitive touch panel 4 of the fourth embodiment of the present invention is similar in structure to the capacitive touch panel 1 of the first embodiment, the main difference is that the capacitive touch panel of the fourth embodiment The shape of the touch sensing electrodes 402 extending into the wiring area 41 in the panel 4 is polygonal. Wherein, a preferred design of the polygon is a regular polygon.

In the capacitive touch panels 1, 2, 3, and 4 of the above embodiments, the shape of the touch sensing electrodes extending to the corresponding wiring area can be not only one-dimensional, but also two-dimensional or even multi-dimensional, or mixed and matched. , can be changed reasonably according to the product design requirements of the capacitive touch panel.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the technical content disclosed above to make some changes or modify them into equivalent embodiments with equivalent changes, but as long as they do not depart from the technical solution of the present invention, the Technical Essence Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (10)

1. A capacitive touch panel, characterized in that it comprises: a substrate; a touch sensing area formed on the substrate, which includes a plurality of touch sensing electrodes; and a wiring area adjacent to the touch sensing area, which includes a wire and a covering layer covering the wiring area; Wherein, the covering layer includes a contact hole, and the touch sensing electrode extends to the wiring area and is electrically connected with the wire through the contact hole. 2. The capacitive touch panel as claimed in claim 1, wherein the shape of the outwardly extending touch sensing electrodes is one-dimensional. 3. The capacitive touch panel as claimed in claim 1, wherein the shape of the outwardly extending touch sensing electrodes is two-dimensional. 4. The capacitive touch panel as claimed in claim 1, wherein the shape of the outwardly extending touch sensing electrodes is multi-dimensional. 5. The capacitive touch panel as claimed in claim 1, wherein the area of each touch sensing electrode extending outward is smaller than or equal to the area of each touch sensing electrode in the touch sensing area. 6 . The capacitive touch panel as claimed in claim 5 , wherein an area ratio of each touch sensing electrode extending outward to each touch sensing electrode in the touch sensing area is 50%. 7. The capacitive touch panel as claimed in claim 1, wherein the outwardly extending touch sensing electrodes are rectangular in shape. 8 . The capacitive touch panel as claimed in claim 1 , wherein the shape of the outwardly extending touch sensing electrodes is rhombus or circle. 9. The capacitive touch panel as claimed in claim 1, wherein the outwardly extending touch sensing electrodes are polygonal in shape. 10 . The capacitive touch panel as claimed in claim 9 , wherein the shape of the outwardly extending touch sensing electrodes is a regular polygon. 11 .

Images