Patent Application
20160349895
The present invention relates to touch technology field; in particular to a touch panel and touch display device.
Touch screens are also called as touch panels, which is a sensor type liquid crystal display device and can receive the input signal from contacting such as finger touching. When touching a graphical buttons, the tactile feedback system on the display makes sure of the action location of the touch according to the pre-set driving scan method. Further, to touch the graphical button is accurately to make sure the order type. Comparing with the conventional technology of the mechanical button panel, the touch panel is more convenient so it is wildly applied.
There are many kinds of the touch panels wildly used, such as a vector pressure sensor touch screen, an infrared grid touch screen, a surface acoustic touch screen and a resistive touch screen. However, in the conventional technology, the capacitance type touch screen is most popular. The capacitive touchscreen technology is that when a finger approaches the capacitive touch panel, it forms the capacitance change. It contains a self-capacitance touch technology and a mutual capacitance touch technology. Using the in-cell self-capacitance touch technology as an example, the plurality of the touch electrodes are made by the transparent conductive material on the glass surface. These touch electrodes are connected with the controller by using the wires. The touch electrodes respectively form capacities to the ground. This is usually called as self-capacitance. When the finger touches the touch screen, the finger capacity will add to the capacity on the screen to increase the capacity of the touch screen. According to the change of the capacity before and after touching, the touch location can be detected.
However, in the convention art, the touch electrode uses one wire to connect with the controller, as shown in
The present invention provides a touch panel and touch display device mainly for solving the problem which solves the open circuit being between the touch electrodes and the controller efficiently. The present invention reduces the defective rate and also enhances the life time of the touch panel.
In order to solve the mentioned technical problem, the present invention is to provide a touch panel, and the touch panel comprises a controller and a plurality of touch electrodes arranged in a matrix, each of the touch electrodes connects to a pin of the controller by at least two wires, the touch electrodes are nano indium tin metal oxide (ITO) electrodes, and the touch panel is a self-capacitance touch panel.
According to a preferred embodiment of the present invention, at least the two wires electrically connecting between each of the touch electrodes and the controller are in one layer.
According to a preferred embodiment of the present invention, at least the two wires electrically connecting between each of the touch electrodes and the controller are in different layers.
In order to solve the technical problem, the present invention adopts the technical solution which is to provide a touch panel, wherein the touch panel comprises a controller and a plurality of touch electrodes arranged in a matrix, and each of the touch electrodes connects to a pin of the controller by at least two wires.
According to a preferred embodiment of the present invention, the touch electrodes are nano indium tin metal oxide (ITO) electrodes.
According to a preferred embodiment of the present invention, at least the two wires electrically connecting between each of the touch electrodes and the controller are in one layer.
According to a preferred embodiment of the present invention, at least the two wires electrically connecting between each of the touch electrodes and the controller are in different layers.
According to a preferred embodiment of the present invention, the touch panel is a self-capacitance touch panel.
In order to solve the technical problem, the present invention adopts the technical solution which is to provide a touch display device, wherein the touch display device comprises a touch panel, the touch panel comprises a controller and a plurality of touch electrodes arranged in a matrix, and each of the touch electrodes connects to a pin of the controller by at least two wires.
According to a preferred embodiment of the present invention, the touch electrodes are nano indium tin metal oxide (ITO) electrodes.
According to a preferred embodiment of the present invention, at least the two wires electrically connecting between each of the touch electrodes and the controller are in one layer.
According to a preferred embodiment of the present invention, at least the two wires electrically connecting between each of the touch electrodes and the controller are in different layers.
According to a preferred embodiment of the present invention, the touch panel is a self-capacitance touch panel.
The advantages of the present invention are: comparing with the convention technology, the touch electrodes of the touch panel of the present invention respectively connect to the controller by at least two wires. Even though the single wire appears an open circuit or other anomalies, the electric connection between the touch electrode and the controller is still achieved by the other wire. The present invention reduces the anomalies resulting from the wire, such as an open circuit, to reduce the product defect rate and to save the pin resource of the controller. Moreover, the product life time can be also prolonged by using two wires for the electric connection further to save the cost for the users.
Please refer to
Where, at least the two wires electrically connecting between each of the touch electrodes 201 and the controller 202 are in one layer. As shown in
In order to simplify the touch panel, and clarify the circuit, in the preferred embodiment, the wires 203 and 204 are respectively disposed in the different layers of the circuit board where the touch electrodes are arranged. For example, if the circuit board where the touch electrodes 201 is disposed is four laminates, the wire 203 can disposed in the first laminate and the wire 204 can be disposed in the fourth laminate.
However, because the resolution of the touch panel is lower than the resolution of the display pixel in the normal condition, the wiring space of the touch panel is more sufficient. Therefore, in the other embodiment, the wires 203 and 204 are disposed in the same layer of the circuit board where the touch electrodes 201 are arranged.
Further, as shown in
When the touch panel operates, the touch electrodes 201 respectively form capacitors to the ground. The controller 202 scans the touch electrodes 201 by using the power (not shown in Figs), and in other words the touch electrodes 201 are charged and discharged through the wires 203, 204. When the user touches the touch panel, the touch panel forms the capacitor to the human body because the human body belongs to a conductor. And then it influences the value of the self-capacitance between the touch electrodes 201 and the ground. The location where the touch electrodes 201 have different capacitance value can be detected to make sure where the user touches the panel. Even when the single wire has an error, the other wire can still transit the signal continuously for the touch electrodes and the controller, as shown in
In the other embodiment, as shown in
The other embodiment can use four, five or even more wires, and the plurality wires relative to the single touch electrode converge into one wire in the pin of the controller, and connect to the same pin of the controller. The wire amount is not limited herein. Because the cost of the wire addition is much lower than the cost for the panel exchange, the above mentioned technology reduces the effect which the error happens between the touch electrode and the controller and affects the touch panel operation without increasing any cost and manufacture process to improve the operation of the touch panel.
It should be noted that, the touch panel in the embodiment is an in-cell self-capacitance touch panel. In the other type touch panels, the scope of the present invention comprises the solution which over one wire connects with the touch electrode and the controller, this does not enumerate.
Comparing with the conventional art, the touch panel of the embodiment comprises the controller and the plurality of touch electrodes arranged in the matrix. Each of the touch electrodes uses at least two jumpers to connect with the same pin of the controller. Even though the single wire appears an open circuit or other anomalies, the electric connection between the touch electrode and the controller is still achieved by the other wire. The present invention reduces the anomalies resulting from the wire, such as an open circuit, to reduce the product defect rate and to save the pin resource of the controller. Moreover, the product life time can be also prolonged by using two wires for the electric connection further to save the cost for the users.
Refer to
The touch panel of the embodiment is an in-cell self-capacitance touch panel. The touch panel of the embodiment comprises the plurality of touch electrodes arranged in the matrix and the controller. In the embodiment, the touch electrodes are nano indium tin metal oxide (ITO) electrodes.
Where, at least two wires is used to connect between each of the touch panel and the controller. In the embodiment, two wires is used to connect between each of the touch electrodes and the controller. In order to simplify the touch panel and clarify the circuit, in the preferred embodiment, the two wires connecting with the same touch electrode and the controller are respectively arranged in the different layers of the circuit board where the touch electrodes are arranged. For example, if the circuit board of the touch panel is four laminates, one wire can be disposed in the first layer and the other wire can be disposed in the fourth layer.
However, because the resolution of the touch electrode is lower the resolution of the display pixel in the general circumstances, the wiring space of the touch panel is more sufficient. Therefore, in the other embodiment, the two wires can also be arranged in the same layer of the circuit board where the touch electrodes are arranged. For example, if the circuit board of the touch panel is four laminates, the two wires can be disposed in the first layer of the circuit board or the fourth layer of the circuit board.
In order to save the pin of the controller and reduce the pin loading of the controller, preferably, the two wires which connect between the touch electrode and the controller converge into one wire near by the pin of the controller, which the wire connects electrically to the pin.
When the touch panel operates, each of the touch electrodes respectively forms self-capacitance to the ground. The controller scans each of the touch electrodes by using the power (not shown in figures), and in other words the touch electrodes are charged and discharged through the two wires. When the user touches the touch panel, the touch panel forms the capacitor to the human body because the human body belongs to a conductor. And then it influences the value of the self-capacitance between the touch electrodes and the ground. The location where the touch electrodes 201 have different capacitance value can be detected to make sure where the user touches the panel. Further, the display device shows the touch position icon or the order relative to the display content. When the error appears in the one wire, the other wire can still transit the signal for the touch electrode and the controller. The touch panel still operates normally and also save the pin of the controller.
In the other embodiment, each of the touch electrodes connects to the controller by using over two wires, such as three wires. In order to save the pin of the controller and reduce the pin loading of the controller, preferably each of the touch electrodes connects to the controller by using the three wires which converges into one wire in the pin of the controller and connects electrically with the same pin. If the one wire has the error, one of the other two wires continuously transits the signal of the touch electrode and the controller. The touch panel still operates normally and also saves the pin of the controller.
In another embodiment, the wires can be four wires, five wires or even more wires. The plurality of the wires which connect to one of the touch electrodes converges into one wire in the pin of the controller and connects the same pin. The wire amount is not limited herein. Because the cost of the wire addition is much lower than the cost for the panel exchange, the above mentioned technology reduces the effect which the error happens between the touch electrode and the controller and affects the touch panel operation without increasing any cost and manufacture process. The present invention improves the operation of the touch panel and saves the pin resource of the controller.
It should be noted that, the touch panel in the embodiment is an in-cell self-capacitance touch panel. In the other type touch panels, the scope of the present invention comprises the solution which over one wire connect with the touch electrode and the controller, this does not enumerate.
Comparing with the conventional art, the touch panel of the embodiment comprises the controller and the plurality of touch electrodes arranged in the matrix. Each of the touch electrodes uses at least two jumpers to connect with the same pin of the controller. Even though the single wire appears an open circuit or other anomalies, the electric connection between the touch electrode and the controller is still achieved by the other wire. The present invention reduces the anomalies resulting from the wire issue, such as an open circuit, to reduce the product defect rate and to save the pin resource of the controller. Moreover, the product life time can be also prolonged by using two wires for the electric connection further to save the cost for the users.
The above are only embodiments of the present invention, the patent does not therefore limit the scope of the invention, any use of the accompanying drawings and the description of the present invention is made equivalent structures or equivalent conversion process, either directly or indirectly in the other the relevant art, are included within the same reason the patent scope of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201410682975.7 | Nov 2014 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2014/092776 | 12/2/2014 | WO | 00 |
