Capacitive touch panel

An embodiment of the present invention discloses a capacitive touch panel, which is provided with an electrostatic protection touching layer, the electrostatic protection touching layer comprises a touching array pattern and an electrostatic protection discharging pattern, and the electrostatic protection discharging pattern is disposed in a space of the touching array pattern, complementing with the touching array pattern. The capacitive touch panel of the embodiment of the present invention, reduces the thickness of touch panel, and saves the material by forming the electrostatic protection layer and the touch sensing layer on one layer, which realizes the touching sense as well as the electrostatic protection, eliminates the capacitance between the electrostatic protection layer and the touch sensing layer, and improves the sensitivity of touching sense.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is based on International Application No. PCT/CN2013/089600 filed on Dec. 16, 2013, which claims priority to Chinese National Application No. 201310320943.8 filed on Jul. 26, 2013. The entire contents of each and every foregoing application are incorporated herein by reference.

TECHNICAL FIELD

Embodiments of the present invention relate to a capacitive touch panel.

BACKGROUND

In recent years, with the development of the science and technology, liquid crystal display technology continues to improve. TFT-LCDs (Thin Film Transistor-Liquid Crystal Displays) occupy an important position in the field of display because of their good image display quality, low energy consumption, environmental protection and other advantages. In a traditional capacitive touch panel, an electrostatic protection layer and a touch sensing layer are generally provided on the backside of a color filter substrate. The electrostatic protection layer is used to reduce the influence on display quality caused by the static in the outer environment, and the touch sensing layer is used to realize touch sense. However, this design produces large capacitance between the electrostatic protection layer and the touch sensing layer, affecting the sensitivity of the touch sense, and increases the thickness of the touch panel. Therefore, it is needed to provide a capacitive touch panel, which can reduce the thickness of a touch panel as well as realizing touch sense and electrostatic protection, to eliminate the capacitance between the electrostatic protection layer and the touch sensing layer.

SUMMARY

Embodiments of the present invention provide a capacitive touch panel, the capacitive touch panel disposes an electrostatic protection layer on another side of the color filter substrate with black matrix layer forming thereon; the electrostatic protection layer comprises a touch array pattern and a electrostatic protection discharging pattern; the electrostatic protection discharging pattern is disposed in the space of the touch array pattern, complementing with the touch array pattern.

Preferably, for example, the electrostatic protection discharging pattern is insulated from the touch array pattern.

Preferably, for example, the touch array pattern comprises multiple columns of touch units which are disposed side by side at an interval, and the multiple columns of touch units are insulated from each other.

Preferably, for example, the touch unit comprises a charge pattern and a plurality of signal receiving patterns.

Preferably, for example, the charge pattern is a comb shaped pattern, the signal receiving pattern is a U-shaped pattern, the protrusions of the charging pattern insert into the grooves of the signal receiving patterns, one of every two protrusions of the charging pattern inserts into one signal receiving pattern, and the charging pattern and the signal receiving patterns are insulated from each other.

Preferably, for example, the charging pattern and every signal receiving pattern are separately provided with connecting wires.

Preferably, for example, the electrostatic protection touching layer is provided with a bonding region, the wires of the charging pattern and the signal receiving pattern extend to the bonding region.

Preferably, for example, the electrostatic protection touching layer is formed by one patterning process.

DETAILED DESCRIPTION

In order to make objects, technical details and advantages of the embodiments of the invention apparent, the technical solutions of the embodiments will be described in a clearly and fully understandable way in connection with the drawings related to the embodiments of the invention. It is obvious that the described embodiments are just a part but not all of the embodiments of the invention. Based on the described embodiments of the invention, those ordinarily skilled in the art can obtain other embodiment(s), without any inventive work, which should be within the scope sought for protection by the invention.

A capacitive touch panel according to an embodiment of the present invention, as illustrated inFIG. 1, is formed of an array substrate101, a color filter substrate102, and liquid crystal103between the array substrate101and the color filter substrate102. An electrostatic protection touching layer104is formed on the backside of the color filter substrate102, i.e., another side of the color filter substrate with a black matrix being formed thereon. The electrostatic protection touching layer104is used to realize the function of electrostatic protection and touching sense, and may be formed of a metal oxide material.

An electrostatic protection touching layer104comprises a touching array pattern and an electrostatic protection discharging pattern. The electrostatic protection discharging pattern and the touching array pattern are insulated from each other, i.e. not connected with each other. The electrostatic protection discharging pattern is disposed in the space (interval) of the touching array pattern, complementing with the touching array pattern. The touching array pattern is used to realize a function of touching sense, the touching array pattern and the electrostatic protection discharging pattern which is complementary to the touching array pattern in shape collectively realize a function of electrostatic protection.

In the present embodiment, the electrostatic protection layer is formed along with the touch sensing layer, which not only reduces the thickness of touch panel, saves the material, but also eliminates the capacitance between the electrostatic protection layer and the touch sensing layer in a traditional technology, so as to improve the sensitivity of the touch panel; the electrostatic protection touching layer may be formed by one step of patterning process, so as to reduce the production processes of manufacturing the touch panel, and improve the productive efficiency of the equipments.

Specifically, for example, the structure of the electrostatic protection touching layer is illustrated inFIG. 2. The electrostatic protection touching layer is divided into an electrostatic protection touching region201and a bonding region202, formed of a touching array pattern and an electrostatic protection discharging pattern203. The touching array pattern and the electrostatic protection discharging pattern203are insulated from each other, i.e. not connected with each other. The touching array pattern is formed of multiple columns of touching units204which are disposed side by side at an interval, the multiple columns of touching units204are insulated from each other, and the electrostatic protection discharging pattern203is disposed in the space of the multiple touching units204, complementing with the touching array pattern.

Only four groups of touching array patterns and electrostatic protection discharging patterns are illustrated inFIG. 2. The number and the length of the touching array patterns may be set according to the size of the touch panel.

A touching unit comprises a charge pattern205and a plurality of signal receiving patterns206. The charge pattern205may be a comb shaped pattern, the signal receiving pattern206may be a U-shaped pattern. The protrusions of the charge pattern205insert into the grooves208of the signal receiving pattern206. One of every two protrusions207of the charge pattern is inserted into one signal receiving pattern206. The charge pattern205and the signal receiving patterns206are insulated from each other, i.e., not connected with each other. The charge pattern205is provided with a charge pattern connecting wire209. Each signal receiving pattern206is provided with a signal receiving pattern connecting wire210. The charge pattern connecting wire209of the charge pattern and the signal receiving pattern connecting wire210of the signal receiving pattern extend to the bonding region202.

The touching unit of the touching array pattern provided by the present embodiment is only an example for explanation; one skilled in the art can utilize other touching sensing pattern in the traditional technology to form the touching array, and it only necessary to change the shape of the electrostatic protection discharging pattern, to dispose the electrostatic protection discharge pattern in the interval of the touching array pattern, complementing with the touching array pattern, so that touching sense can be realized and the function of electrostatic protection can be achieved at the same time.

An electrostatic protection discharging pattern203is provided with an electrostatic protection discharging pattern connecting wire211. The electrostatic protection discharging pattern connecting wire211may surround the electrostatic protection discharging pattern203and the touching array pattern, connect with the electrostatic protection discharging pattern203, and be insulated from the touching array pattern; the electrostatic protection discharging pattern connecting wire211extends to the bonding region202.

The charge pattern connecting wire209, the signal receiving pattern connecting wire21and the electrostatic protection discharging pattern connecting wire211are connected to a circuit board in a bonding area via bonding. Because the electrostatic protection touching layer is made of a transparent metal oxide material, in the process of bonding, it is hard for the equipments to recognize marks, and when forming a black matrix on a color filter substrate, a bonding mark for bonding the electrostatic protection touching layer is formed on the black matrix, so as to achieve the goal of alignment without increasing processes.

The capacitive touch panel of the embodiments of the present invention, reduces the thickness of a touch panel, and saves the material by forming the electrostatic protection layer and the touch sensing layer on one layer, which realizes touching sense as well as electrostatic protection, eliminates the capacitance between the electrostatic protection layer and the touch sensing layer, and improves the sensitivity of touching sense.

The foregoing are merely exemplary embodiments of the invention, but not used to limit the protection scope of the invention. One skilled in the art could devise variations that within the scope and the spirit of the present invention, thus all equal technical solutions also belong to the scope of the present invention, and the protection scope of the invention is defined by attached claims.