CN104820522B - Utilize the multi-screen synchronous contactor control device and method from appearance characteristic - Google Patents

Abstract

Using the multi-screen synchronous contactor control device from appearance characteristic by installing control circuit in main touch-screen, and installation is from molar block and mutual tolerance module in control circuit, while main touch-screen and multiple induction channels from touch-screen and driving channel multiplexing, oneself appearance signalling channel are separate.Main touch-screen and multiple lines of induction and drives line from touch-screen between each two and oneself appearance line are connected by the connector.Therefore, it is possible to control main touch-screen by control circuit and multiple from touch-screen, avoid that control circuit is installed in each touch-screen, so as to reduce the cost of multi-screen synchronous touch-control.In addition, also provide a kind of multi-screen synchronous touch control method using from appearance characteristic.

Description

Multi-screen synchronous touch device and method using self-capacitance characteristics

technical field

The invention relates to a multi-screen synchronous touch technology, in particular to a low-cost multi-screen synchronous touch device and method utilizing self-capacitance characteristics.

Background technique

Due to display requirements, more and more work environments require multi-screen displays to ensure that more information can be obtained at the same time. The common multiple display touch solutions on the market are all a display screen with a touch screen and a separate control circuit. The control circuit is connected to the host terminal through a USB cable to realize the touch function. In this solution, the functions of each touch screen are independent, which is the easiest solution. But it requires multiple control circuits and is expensive. In addition, the host end also needs to provide multiple USB interfaces, which wastes host port resources.

Contents of the invention

Based on this, it is necessary to provide a low-cost multi-screen synchronous touch device utilizing self-capacitance.

A multi-screen synchronous touch device utilizing self-capacitance characteristics, including a control circuit and a connector, as well as a self-capacitance module and a mutual-capacity module;

The self-capacitance module and the mutual capacitance module are installed in the control circuit at the same time; the control circuit is used to control the main touch screen and multiple slave touch screens; the control circuit is installed in the main touch screen, and the main touch screen and The sensing channels and driving channels in multiple slave touch screens are multiplexed, and the self-capacitance signal channels are independent of each other; the sensing lines, driving lines and self-capacitance lines between the master touch screen and every two of the multiple slave touch screens pass through the connection device connection.

In one of the embodiments, the master touch screen is connected to a host, and the host is used to control the master touch screen and multiple slave touch screens.

In one of the embodiments, the upper-line sensing line and the lower-line driving line in the main touch screen form a mutual capacitance structure, and then lead out to the control circuit.

In one embodiment, the sensing lines and driving lines of the master touch screen are correspondingly connected to the sensing lines and driving lines of a plurality of slave touch screens through the connector.

In one of the embodiments, self-capacitance signals are filled between the master touch screen and every two upper-line sensing lines of multiple slave touch screens to form self-capacitance signal lines; module connection.

In addition, a low-cost multi-screen synchronous touch method utilizing the self-capacitance feature is also provided.

A multi-screen synchronous touch method utilizing self-capacitance characteristics, comprising the following steps:

The self-capacitance module and the mutual capacitance module are installed in the control circuit, and then the control circuit is installed in the main touch screen, so that the control circuit controls the main touch screen and multiple slave touch screens;

multiplexing the sensing channels and driving channels of the master touch screen and multiple slave touch screens, and independent self-capacitance signal channels;

Connectors are used to connect the sensing lines, driving lines and self-capacitance lines between the main touch screen and every two of the multiple slave touch screens.

In one of the embodiments, it further includes a step of: leading the mutual capacitance structure formed by the upper line sensing line and the lower line driving line in the main touch screen to the control circuit.

In one of the embodiments, it further includes the step of: filling self-capacitance signals between every two upper line sensing lines of the master touch screen and multiple slave touch screens, so as to form a self-capacitance signal line between every two upper line sensing lines.

In one of the embodiments, it also includes the step of: when receiving a touch signal, detecting whether the capacitance to ground of the master touch screen or multiple slave touch screens changes, if the capacitance to ground of the master touch screen or multiple slave touch screens If there is a change, it is considered that there is a touch action on the touch screen with a change in capacitance to ground.

In one of the embodiments, after determining the touch screen with the touch action, judging the coordinate position of the touch action according to the capacitance change between the upper line sensing line and the lower line driving line.

The above-mentioned multi-screen synchronous touch device and method using self-capacitance feature installs a control circuit in the main touch screen, and installs a self-capacitance module and a mutual capacitance module in the control circuit. The drive channel multiplexing and self-capacitance signal channels are independent of each other. The sensing lines, driving lines and self-capacitance lines between the master touch screen and every two of the multiple slave touch screens are connected through the connector. Therefore, the master touch screen and multiple slave touch screens can be controlled by the control circuit, avoiding installing a control circuit in each touch screen, thereby reducing the cost of multi-screen synchronous touch control.

Description of drawings

FIG. 1 is a block diagram of a multi-screen synchronous touch device utilizing self-capacitance characteristics;

Fig. 2 is a schematic diagram of circuit connections of a multi-screen synchronous touch device in an embodiment;

Fig. 3 is a structural schematic diagram of the main touch screen;

FIG. 4 is a flow chart of a multi-screen synchronous touch method utilizing the self-capacitance feature.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in FIG. 1 , it is a block diagram of a multi-screen synchronous touch device utilizing self-capacitance characteristics.

A multi-screen synchronous touch device utilizing self-capacitance features, including a control circuit 101 , a connector 104 , a self-capacitance module 103 and a mutual-capacitance module 102 .

The self-capacitance module 103 and the mutual capacitance module 102 are installed in the control circuit 101 at the same time; the control circuit 101 is used to control the main touch screen and multiple slave touch screens; the control circuit 101 is installed in the main touch screen, The master touch screen is multiplexed with sensing channels and drive channels in multiple slave touch screens, and the self-capacitance signal channels are independent of each other; The wires are connected through said connector 104 .

In this embodiment, the self-capacity module 103 includes at least one self-capacity chip.

In this embodiment, the mutual capacity module 102 includes at least one mutual capacity chip.

The master touch screen is connected to a host, and the host is used to control the master touch screen and multiple slave touch screens.

Only by connecting the master touch screen with the host, one host can control the master touch screen and multiple slave touch screens. At the same time, only the main touch screen is connected with the host, therefore, the host only needs to provide one interface to connect with the main touch screen without too many interfaces. Therefore, when controlling multiple touch screens, the connection relationship between the host and the touch screens can be simplified.

In this embodiment, the upper-line sensing line and the lower-line driving line in the main touch screen form a mutual capacitance structure, and then lead out to the control circuit 101 .

Preferably, the mutual capacitance structure is led out to the control circuit 101 through a silver glue wire.

Specifically, in the visible area of the touch screen, the upper-line sensing lines and the lower-line sensing lines form a mutual capacity structure, and these mutual capacity structures are led out to the control circuit 101 outside the visible area through silver glue lines. In addition, the sensing lines and driving lines in the touch screen extend to the connector 104 of the touch screen, and then connect the sensing lines and driving lines in other touch screens through the connector 104 . If there are sensing lines and driving lines overlapping, use an insulating layer to isolate them in the overlapping area.

In this embodiment, the sensing lines and driving lines of the master touch screen are correspondingly connected to the sensing lines and driving lines of a plurality of slave touch screens through the connector 104 .

Specifically, each touch screen is correspondingly provided with a connector 104 .

A self-capacitance signal is filled between every two upper line sensing lines of the master touch screen and multiple slave touch screens to form a self-capacitance signal line.

The self-capacitance signal line of each touch screen extends to the visible area and integrates a total self-capacity signal line. Then connected to the control circuit 101,

The self-capacitance signal lines are independent of each other and are all connected to the self-capacitance module 103 .

In particular, all the self-capacitance signal lines are connected to the self-capacitance chips in the self-capacity module 103 , and the pins of the self-capacity chips connected to each self-capacity signal line are different.

As shown in FIG. 2 , it is a schematic diagram of circuit connections of a multi-screen synchronous touch device in an embodiment.

In this embodiment, three touch screens are taken as an example.

Wherein, a control circuit 101 is installed in the main touch screen, and the control circuit 101 has at least one self-capacitance chip and at least one mutual-capacity chip respectively. The sensing channels and driving channels of the three touch screens are multiplexed, while the self-capacitance signal channels are independent of each other, and the sensing lines, driving lines and self-capacitance lines between every two touch screens are connected through the connector 104 .

The main touch screen is connected with the host through a USB cable.

Therefore, the host computer can control three touch screens through one USB interface, and only need to install the control circuit 101 in the main touch screen to complete the control functions of the three touch screens. Therefore, the connection relationship between the host and multiple touch screens is effectively simplified, and compared with the traditional need to install a control circuit 101 in each touch screen, the cost of a multi-screen synchronous touch device is greatly reduced.

As shown in FIG. 3 , it is a schematic structural diagram of the main touch screen.

In the visible area, the upper line sensing lines (Rx1, Rx2, R^3...Rxn) and the lower line driving lines (Tx1, Tx2, Tx3...Txn) form a mutual capacity structure. The mutual capacitance structure is led out to the control circuit 101 outside the visible area through the silver glue wire. In addition, the sensing lines and driving lines will extend to the connector 104 of the main touch screen, and then connect the sensing lines and driving lines of other touch screens. When the sensing line and the driving line overlap, the overlapping part is separated by an insulating layer.

Self-capacitance signals are filled between every two sensing lines on the upper line layer, and all self-capacitance signals are extended to the visible area to form a total self-capacitance signal line, which is connected to the control circuit 101 . In particular, the self-capacitance signal lines of each touch screen are independent, and the pins when connecting to the self-capacitance chip are different.

The above-mentioned multi-screen synchronous touch device using self-capacitance feature installs the control circuit 101 in the main touch screen, and installs the self-capacitance module 103 and the mutual capacitance module 102 in the control circuit 101, and the induction between the main touch screen and multiple slave touch screens simultaneously The channels and drive channels are multiplexed, and the self-capacitance signal channels are independent of each other. The sensing lines, driving lines and self-capacitance lines between the master touch screen and every two of the multiple slave touch screens are connected through the connector 104 . Therefore, the master touch screen and multiple slave touch screens can be controlled by the control circuit 101 , avoiding the installation of the control circuit 101 in each touch screen, thereby reducing the cost of multi-screen synchronous touch.

As shown in FIG. 4 , it is a multi-screen synchronous touch method utilizing the self-capacitance feature.

A multi-screen synchronous touch method utilizing self-capacitance characteristics, comprising the following steps:

Step S110 , installing the self-capacitance module and the mutual-capacity module in the control circuit, and then installing the control circuit in the master touch screen, so that the control circuit controls the master touch screen and multiple slave touch screens.

Step S120 , multiplexing the sensing channels and driving channels of the master touch screen and multiple slave touch screens, and independent self-capacitance signal channels.

Step S130, using connectors to connect the sensing lines, driving lines and self-capacitance lines between the master touch screen and every two of the plurality of slave touch screens.

The multi-screen synchronous touch control method utilizing the self-capacity feature further includes the step of: connecting the master touch screen with a host, so that the host controls the master touch screen and multiple slave touch screens.

The multi-screen synchronous touch control method utilizing the self-capacitance feature further includes the step of: leading out the mutual capacitance structure formed by the upper-line sensing line and the lower-line driving line in the main touch screen to the control circuit.

The multi-screen synchronous touch control method utilizing the self-capacitance feature further includes the step of: leading the mutual-capacity structure to the control circuit by using silver glue wires.

The multi-screen synchronous touch method utilizing the self-capacitance feature further includes the step of: correspondingly connecting the sensing lines and driving lines of the master touch screen with the sensing lines and driving lines of multiple slave touch screens by means of connectors.

The multi-screen synchronous touch method utilizing the self-capacitance characteristic also includes the step of: filling the self-capacitance signal between every two on-line sensing lines of the master touch screen and multiple slave touch screens, so that a self-capacitance signal is formed between every two on-line sensing lines capacity signal line.

The multi-screen synchronous touch method using self-capacitance characteristics also includes the step of: when receiving a touch signal, detecting whether the ground capacitance of the master touch screen or multiple slave touch screens changes, if the master touch screen or multiple slave touch screens If the ground capacitance changes, it is considered that the touch screen with the ground capacitance changes has a touch action.

The multi-screen synchronous touch method utilizing the self-capacitance characteristic also includes determining the coordinate position of the touch action through the capacitance change between the upper line sensing line and the lower line driving line after determining the touch screen with the touch action.

The above-mentioned multi-screen synchronous touch method using self-capacitance features installs a control circuit in the main touch screen, and installs a self-capacitance module and a mutual capacitance module in the control circuit. The multiplexing and self-capacitance signal channels are independent of each other. The sensing lines, driving lines and self-capacitance lines between the master touch screen and every two of the multiple slave touch screens are connected through the connector. Therefore, the master touch screen and multiple slave touch screens can be controlled by the control circuit, avoiding installing a control circuit in each touch screen, thereby reducing the cost of multi-screen synchronous touch control.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. A multi-screen synchronous touch device utilizing self-capacity characteristics, comprising a control circuit and a connector, characterized in that it also includes a self-capacitance module and a mutual capacitance module; The self-capacitance module and the mutual capacitance module are installed in the control circuit at the same time; the control circuit is used to control the main touch screen and multiple slave touch screens; the control circuit is installed in the main touch screen, and the main touch screen and The multiplexing of sensing channels and driving channels in multiple slave touch screens, and the self-capacitance signal channels are independent of each other; the sensing lines, driving lines and self-capacitance signal lines between the master touch screen and every two of the multiple slave touch screens pass through the connector connection. 2 . The multi-screen synchronous touch device utilizing self-capacitance according to claim 1 , wherein the master touch screen is connected to a host, and the host is used to control the master touch screen and multiple slave touch screens. 3. The multi-screen synchronous touch device utilizing self-capacitance characteristics according to claim 1, characterized in that, after the upper-line sensing line and the lower-line driving line in the main touch screen form a mutual capacity structure, they are led to the control on the circuit. 4. The self-capacitance multi-screen synchronous touch device according to claim 1, wherein the sensing line and driving line of the master touch screen pass through the connector and a plurality of sensing lines and driving lines of the slave touch screen. Lines correspond to connections. 5. The multi-screen synchronous touch device utilizing self-capacitance characteristics according to claim 1, characterized in that self-capacitance signals are filled between the master touch screen and every two on-line sensing lines of a plurality of slave touch screens to form a self-capacitance Signal lines; the self-capacitance signal lines are independent of each other and are all connected to the self-capacitance module. 6. A multi-screen synchronous touch method utilizing self-capacitance characteristics, comprising the following steps: The self-capacitance module and the mutual capacitance module are installed in the control circuit, and then the control circuit is installed in the main touch screen, so that the control circuit controls the main touch screen and multiple slave touch screens; multiplexing the sensing channels and driving channels of the master touch screen and multiple slave touch screens, and independent self-capacitance signal channels; Connectors are used to connect the sensing lines, driving lines and self-capacitance signal lines between the master touch screen and every two of the slave touch screens. 7. The multi-screen synchronous touch control method utilizing self-capacitance characteristics according to claim 6, further comprising the step of: leading the mutual capacitance structure formed by the upper-line sensing line and the lower-line driving line in the main touch screen to the on the control circuit. 8. The multi-screen synchronous touch method utilizing self-capacitance according to claim 6, further comprising the step of: filling the self-sensing line between every two on-line sensing lines of the master touch screen and a plurality of slave touch screens. Capacitance signal, so that a self-capacitance signal line is formed between every two on-line sensing lines. 9. The multi-screen synchronous touch method utilizing self-capacitance characteristics according to claim 6, further comprising the step of: detecting the ground capacitance of the master touch screen or multiple slave touch screens when a touch signal is received Whether there is a change, if the ground capacitance of the master touch screen or multiple slave touch screens changes, it is considered that the touch screen with the ground capacitance changes has a touch action. 10. The self-capacitance multi-screen synchronous touch method according to claim 9, further comprising: after determining the touch screen with a touch action, through the capacitance change between the upper line sensing line and the lower line driving line Determine the coordinate position of the touch action.