JP2012208749A - Electrostatic capacitance type touch panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve performance of a touch panel by blocking an electrostatic capacitance coupling between an electrode inside a sensor surface and a peripheral wiring and reducing variation in sensitivity.SOLUTION: An electrostatic capacitance type touch panel is provided with a conductive material, which blocks a capacitance coupling, between a peripheral wiring connecting to a sensor electrode inside an active area and an electrode pattern inside a sensor surface. The conductive material 4 connected to a GND is arranged between the peripheral wiring 2 and the sensor electrode 3 inside the sensor surface. Accordingly, the capacitance coupling between the peripheral wiring 2 and the sensor electrode 3 can be blocked, variation in electrostatic capacitance values inside the sensor surface is eliminated, and constant sensitivity without variation is obtained inside the sensor surface.

Description

  The present invention relates to a sensor electrode of a capacitive touch panel using a capacitance. The sensor glass and front cover used for the capacitive touch panel are thin, and the controller IC used has low power consumption. Therefore, it is widely used for a device that can be intuitively operated by a user from a mobile device such as a mobile phone or a smartphone.

  In recent years, a performance that can be used by a user without stress is required as a performance of a capacitive touch panel.

  Conventional touch panel wiring includes, for example, wiring connected from the sensor electrode in the active area to the outer peripheral wiring, and from the outer peripheral wiring to the controller IC (see, for example, Patent Document 1). In the case of this configuration, the sensor electrode pattern in the active area and the outer peripheral wiring are adjacent to each other, and there are places where they are wired close to each other.

JP 2010-128676 A

  When the sensor electrode pattern in the active area and the outer peripheral wiring are provided close to each other as in the prior art, capacitive coupling occurs between the sensor electrode in the active area and the sensor outer peripheral wiring connected to the sensor electrode pattern. There is a problem in that the capacitance value varies and the sensitivity of the touch panel is not constant in the surface.

  Therefore, an object of the present invention is to provide a touch panel in which the sensitivity in the sensor surface is constant and the capacitance value does not vary by blocking capacitive coupling between wirings.

  A conductive material that blocks capacitive coupling is provided between the outer peripheral wiring connected to the sensor electrode in the active area and the electrode pattern in the sensor surface. The conductive material is connected to GND. With such a configuration, capacitive coupling that has occurred between the sensor in-plane electrode pattern and the peripheral wiring can be cut off.

  The variation in the capacitance value in the sensor surface is eliminated, and a constant sensitivity without variation in the sensor surface is obtained.

3 is a schematic plan view in which a part of the touch panel of Example 1 is enlarged. FIG. It is a fragmentary sectional view showing the touch panel of Example 1 typically.

  In the capacitive touch panel of the present invention, a conductor material is provided between the sensor electrode in the active area and the outer peripheral wiring connected to the sensor electrode. The conductor material is connected to GND and formed outside the active area.

  Hereinafter, an embodiment of a capacitive touch panel will be described with reference to the drawings.

  The sensor electrode of the touch panel of a present Example is demonstrated based on drawing. FIG. 1 is a schematic plan view partially showing an electrode configuration of a touch panel. FIG. 2 is a partial cross-sectional view thereof. As shown in the figure, a peripheral wiring 2 and a sensor electrode 3 are formed on the substrate 1 of the touch panel. The sensor electrode 3 is provided in the active area. The outer peripheral wiring 2 and the sensor electrode 3 are electrically connected. A conductor material 4 connected to GND is disposed between the outer peripheral wiring 2 and the sensor electrode 3 at a location where the outer peripheral wiring 2 and the sensor electrode 3 are adjacently wired. As a result, the capacitive coupling between the outer peripheral wiring 2 and the sensor electrode 3 can be reduced.

  At this time, it is necessary to provide an insulator 5 between the peripheral wiring 2 and the conductor material 4. The effect can be obtained regardless of the positional relationship between the upper and lower sides where the insulator 5 is provided. Further, the conductor material 4 may be disposed between the outer peripheral wiring 2 and the sensor electrode 3 regardless of the pattern shape of the sensor electrode 3 in the sensor surface and the position of the conductor material 4.

1 Substrate 2 Peripheral wiring 3 Sensor electrode 4 Conductor material 5 Insulator

Claims (1)

In the capacitive touch panel in which the sensor electrode and the outer peripheral wiring electrically connected to the sensor electrode are formed on the substrate,
A conductor material connected to GND is provided between the sensor electrode and the outer peripheral wiring, the sensor electrode is formed in an active area, and the conductor material is formed outside the active area. Capacitive touch panel.

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