CROSS REFERENCE TO RELATED APPLICATION

This application claims priority to Korean Patent Application No. 10-2019-0089860, filed on Jul. 24, 2019 in the Republic of Korea, the entire contents of which are hereby expressly incorporated by reference for all purposes as if fully set forth herein into the present application.

BACKGROUND

1. Field

Embodiments of the present disclosure relate to a touch display device.

2. Description of the Related Art

The advent of the information-based society has brought increasing demand for display devices for displaying images, and various types of display devices such as liquid crystal display devices, organic light-emitting display devices, and the like are being utilized.

In order to provide a variety of functions to users, the display device provides a function of recognizing a touch on a display panel using a user's finger or pens and performing an input process on the basis of the recognized touch.

For example, sensors for sensing a touch and lines can be arranged on the display panel, and a change in capacitance due to a user's touch on the display panel can be detected, thereby sensing the user's touch.

In this case, the display panel includes various electrodes and lines for driving the display, in addition to the configuration for sensing a touch, which may cause the formation of parasitic capacitance between the electrodes for driving the display and the sensors for sensing a touch, which may degrade the performance of touch sensing.

BRIEF SUMMARY

Embodiments of the present disclosure provide an improved touch display device capable of reducing parasitic capacitance between a signal line to which a signal for driving a display is applied and a touch routing line for detecting a touch sensing signal.

Embodiments of the present disclosure provide an improved touch display device capable of reducing noise in a touch sensing signal due to a signal line that can form parasitic capacitance with a touch routing line.

In an aspect, embodiments of the present disclosure can provide a touch display device including an active area in which a plurality of subpixels is arranged; a non-active area positioned outside the active area and in which a plurality of signal lines is arranged; a plurality of touch electrodes arranged in the active area; and a plurality of touch routing lines arranged in the non-active area and electrically connected to the touch electrodes.

The touch display device can include a connection electrode that is positioned between the signal lines and the touch routing lines in the non-active area, is electrically connected to a common electrode disposed in the subpixel, and at least a portion thereof includes at least one opening positioned in an area overlapped with the signal lines.

In addition, the touch display device can include at least one shielding electrode, which is disposed in the opening of the connection electrode so as to be insulated from the connection electrode, and to which a constant voltage is applied.

In another aspect, embodiments of the present disclosure can provide a touch display device including a substrate including an active area in which a plurality of subpixels is arranged and a non-active area in which a plurality of signal lines is arranged; an adhesive layer arranged on the substrate; a touch sensing unit arranged on the adhesive layer and including a plurality of touch electrodes arranged on the active area and a plurality of touch routing lines arranged on the non-active area; a connection electrode positioned between the signal lines and the adhesive layer in the non-active area, electrically connected to a common electrode disposed in the subpixel, and at least a portion thereof includes at least one opening positioned in an area overlapped with the signal lines; and at least one shielding electrode disposed in the opening of the connection electrode so as to be insulated from the connection electrode and to which a constant voltage is applied.

According to embodiments of the present disclosure, a touch routing line can be disposed so as not to overlap the signal line to which a signal for driving a display is applied, and openings can be formed in a connection electrode disposed between the touch routing line and the signal line and connected to a common electrode, thereby reducing parasitic capacitance that is foiled between the touch routing line and the signal line.

According to embodiments of the present disclosure, a shielding electrode, to which a constant voltage is applied, can be disposed in the opening of the connection electrode so as to be insulated from the connection electrode so that noise due to the signal lines positioned under the shielding electrode can be dispersed, thereby reducing the noise of a touch sensing signal detected through the touch routing lines.

