CN212460555U

CN212460555U - Touch signal processing system

Info

Publication number: CN212460555U
Application number: CN202021575169.7U
Authority: CN
Inventors: 欧峥伟; 姚世烨; 李振乐
Original assignee: Shenzhen KTC Commercial Technology Co Ltd
Current assignee: Shenzhen KTC Commercial Technology Co Ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-02-02
Anticipated expiration: 2030-07-30

Abstract

The utility model discloses a touch signal processing system, including touch module and main control board, be equipped with processing unit and gating switch on the main control board, processing unit with gating switch electricity is connected and is controlled gating switch's gating, external equipment is connected to gating switch, processing unit with touch module communication connection, processing unit is used for handling the original signal that touch module sent and the touch signal of output USB agreement form extremely gating switch. The touch module and the main control board only have one path of communication interface connection line, the circuit design is simple, the performance of the processing unit is fully utilized, the hardware requirement of the touch module is reduced, the touch signal in the USB protocol format is directly output by the processing unit, the transmission delay of the touch signal is reduced, the touch module only needs to send the original signal to the processing unit, the algorithm and other protocol processing are completed by the processing unit, and the software debugging workload is reduced.

Description

Touch signal processing system

Technical Field

The utility model relates to a touch signal processing technology field, more specifically say and indicate a touch signal processing system.

Background

On the mutual dull and stereotyped display products of intelligence of taking touch-control function such as education all-in-one, intelligent meeting flat board, enterprise's wisdom screen, the master control board has the main chip, can external multichannel input information source, like the inside OPS of machine (accord with open pluggable standard's module), leading HDMI (leading high definition multimedia interface), side HDMI (the high definition multimedia interface of side), side DP (high definition digital display interface), VGA (the interface of video graphic array standard output) etc.. The input interfaces can be connected with source equipment of the system, such as a desktop computer, a notebook computer and the like. The touch frame on such display products is required to be used as a control input device by the system on the main control board and the source device connected to the input interface. On one hand, the main control board can be operated through icons on the interactive interface, and the main control board is operated like a remote controller, keys and the like to execute volume increasing and reducing, information source switching and the like. On the other hand, when the information source is switched, the touch frame can be switched to the source device corresponding to the current information source to operate the source device through the touch frame, for example, when the source device is a notebook computer, the touch frame has a function similar to a mouse, and the source device can be operated.

In the existing Touch system, as shown in fig. 1, the main board is externally provided with input interfaces OPS, HDMI, DP, Type-C, etc., each path of video input interface has a corresponding Touch interface, which may be one-to-one or one-to-many, that is, one Touch corresponds to multiple video input interfaces. When the multifunctional bus is used, two wires are connected between the main board and the external equipment, one wire is used for audio and video transmission, and the other wire is used for touch signal transmission. The touch frame comprises two transmission interfaces, the first path is local touch transmission and is used as control equipment of the main chip, and the second path is information source touch and is used as control equipment of external source equipment. As for the local touch, there is a protocol interface such as UART (asynchronous serial communication) and USB, and if the protocol type of the touch frame is the same as that of the main chip, the touch frame is connected by a corresponding wire in the method 2. Such as USB protocol-USB protocol or UART protocol-UART protocol. If the two end protocol types are different, the MCU is needed to be added for protocol conversion. If the touch frame is a UART protocol and the main chip is a USB protocol, communication is carried out after conversion through the MCU according to the mode 1. The signal source touch, usually a USB protocol, is connected to the main board through a wire by the touch frame, and the main board is designed with a switch SW and controls the switch-on of the SW through the GPIO of the main chip. SW is a gating circuit with one input and multiple outputs. When the user switches the information source to the external input interface by the TOUCH control of the local computer by using the TOUCH function, the main chip controls the SW to be gated to the corresponding TOUCH output interface through a GPIO (general purpose input/output port). The local touch is required to be in a link state all the time, and a user can control the main chip to execute actions through the touch. And the source touch follows the source switching, and a user can operate the source equipment through the touch frame.

When an object touches the screen, the touch frame senses the object and outputs a variable quantity, and at the moment, the specific coordinate needs to be obtained through calculation. In the existing scheme, two modes are available for calculating touch data, namely, an algorithm is executed by a touch frame, and the algorithm is sent in two paths after calculation is finished and is respectively sent to a main chip and external source equipment. And secondly, the algorithm is executed by a main chip, the touch frame sends original data to the main chip through local touch, the main chip is touched and returned to the touch frame through the local after calculation, and the touch frame receives the calculated data and simulates a second path of output, namely information source touch, through an MCU inside the touch frame.

In the first method, the MCU of the touch frame has strong computing capability and comprises a plurality of communication interfaces, so that the cost is high. In the second mode, the main chip needs to return to the touch frame after the calculation is finished, so that transmission delay is increased, and the touch experience is adversely affected. Meanwhile, because the existing method needs two paths of output to be connected to the main board, the connection line between the main board and the touch frame is also complicated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide a touch signal processing system.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a touch signal processing system comprises a touch module and a main control board, wherein a processing unit and a gating switch are arranged on the main control board, the processing unit is electrically connected with the gating switch and controls the gating of the gating switch, the gating switch is connected with external equipment, the processing unit is in communication connection with the touch module, and the processing unit is used for processing an original signal sent by the touch module and outputting a touch signal in a USB protocol format to the gating switch.

The further technical scheme is as follows: the processing unit is in wired connection with the touch module through a USB or UART.

The further technical scheme is as follows: the processing unit comprises a main chip, and the main chip is used for converting the original signal into a touch signal in a USB protocol format.

The further technical scheme is as follows: the processing unit comprises a main chip and an MCU, the MCU is electrically connected with the main chip, the main chip receives the original signal and transmits the original signal to the MCU, and the MCU is used for converting the original signal into a touch signal in a USB protocol format.

Compared with the prior art, the utility model beneficial effect be: the utility model relates to a touch signal processing system, it is succinct that touch module and main control board only communicate the interface line all the way, circuit design is simple, make full use of processing unit's performance, reduce touch module's hardware requirement, the touch signal of USB protocol format is by the direct output of processing unit, the transmission delay of touch signal has been reduced, touch module only need send original signal for processing unit can, algorithm and other agreement are handled and all are accomplished by processing unit, software debugging work load reduces.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above description and other objects, features, and advantages of the present invention more clearly understandable, preferred embodiments are specifically mentioned, and detailed description is given below.

Drawings

FIG. 1 is a schematic diagram of a conventional touch system;

FIG. 2 is a schematic diagram of a touch signal processing system;

FIG. 3 is a schematic diagram of a touch signal processing system according to another embodiment;

fig. 4 is a flowchart of a touch signal processing method.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and the following detailed description.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "secured" are to be construed broadly and can, for example, be connected or detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

As shown in fig. 2 to 3, a touch signal processing system includes a touch module 2 and a main control board 1, the main control board 1 is provided with a processing unit and a gating switch 3, the processing unit is electrically connected to the gating switch 3 and controls gating of the gating switch 3, the gating switch 3 is connected to an external device, the processing unit is in communication connection with the touch module 2, and the processing unit is configured to process an original signal sent by the touch module 2 and output a touch signal in a USB protocol format to the gating switch 3. The touch module 2 and the main control board 1 only have one path of communication interface connection line, the circuit design is simple, the performance of the processing unit is fully utilized, the hardware requirement of the touch module 2 is reduced, the touch signal in the USB protocol format is directly output by the processing unit, the transmission delay of the touch signal is reduced, the touch module 2 only needs to send the original signal to the processing unit, the algorithm and other protocol processing are completed by the processing unit, and the software debugging workload is reduced.

Specifically, the processing unit and the touch module 2 are connected through a USB wire or a UART wire, and the interface connection is simple.

Specifically, as shown in fig. 2, the processing unit includes a first main chip 4, and the first main chip 4 is configured to convert the original signal into a touch signal in a USB protocol format. The various performances of the current first main chip 4 are fully utilized, so that the requirement of the touch module 2 on the computing capability is reduced, and meanwhile, the transmission delay caused by return transmission is avoided.

Specifically, the first main chip 4 itself can be used as a USB host (which can be connected to a USB peripheral device as a USB host), and can also be used as a USB device (which can be connected to a USB host as a USB disk).

Specifically, the first main chip 4 is an audio/video processing chip with android/Linux.

Specifically, as shown in fig. 3, the processing unit includes a second main chip 5 and an MCU6, the MCU6 is electrically connected to the second main chip 5, the second main chip 5 receives the original signal and transmits the original signal to the MCU6, and the MCU6 is configured to convert the original signal into a touch signal in a USB protocol format. In this case, the second master chip 5 cannot output a touch signal in the USB protocol format, so that an MCU6 is added to convert signals in the UART/SPI/PCIe protocol sent by the second master chip 5 into a touch signal in the USB protocol, and the touch requirement can be achieved through the strobe switch 3. The requirement of the touch module on the computing capability is reduced, and meanwhile, the transmission delay caused by return transmission is avoided.

Specifically, the model of the MCU6 is an Arm kernel single chip microcomputer.

Specifically, the touch signal processing system can be applied to interactive flat panel display products such as education integrated machines, intelligent conference flat panels, enterprise intelligent screens and the like.

As shown in fig. 4, a touch signal processing method based on the touch signal processing systems shown in fig. 2 to 3 includes the following steps:

s1, acquiring an original signal from the touch module through the processing unit;

s2, processing the original signal through the processing unit to obtain a touch signal in a USB protocol format;

and S3, sending the touch signal in the USB protocol format to the gating switch through the processing unit and controlling the external device to execute corresponding operation.

The touch data are calculated by the processing unit, and then the processing unit outputs the touch signals in the USB protocol format to the equipment externally connected with the input interface after the touch signals are processed by the processing unit and pass through the gating switch. Various performances of the current processing unit are fully utilized, so that the requirement of the touch module on the computing capacity is reduced, and meanwhile, the transmission delay caused by return transmission is avoided.

Specifically, the step of acquiring, by the processing unit, the raw signal from the touch module includes:

the original signal from the touch module is acquired through USB wired connection or UART wired connection, and the interface connection is concise.

Specifically, the step of processing the original signal by the processing unit to obtain the touch signal in the USB protocol format includes:

and processing the original signal through the first main chip to obtain a touch signal in a USB protocol format. In this case, the first host chip itself can be used as a USB host (which can be connected to a USB peripheral device as a USB host), or as a USB device (which can be connected to a USB host as a USB disk). The touch module only needs to send an original signal to the first main chip, algorithm and other protocol processing are completed by the first main chip, and software debugging workload is reduced.

processing the original signal through a second main chip and outputting a transfer signal;

and acquiring a transfer signal output by the main chip through the MCU, and converting the transfer signal to obtain a touch signal in a USB protocol format. In this case, the second main chip cannot output a touch signal in a USB protocol format, so an MCU is added to convert signals of protocols such as UART/SPI/PCIe sent by the second main chip into a touch signal in a USB protocol, and the touch requirement can be achieved through the gating switch. The requirement of the touch module on the computing capability is reduced, and meanwhile, the transmission delay caused by return transmission is avoided.

Compared with the prior art, the utility model relates to a touch-control signal processing system, the communication interface line is succinct only all the way to touch module and main control board, circuit design is simple, make full use of the processing unit's performance, reduce touch module's hardware requirement, the touch signal of USB protocol format is by the direct output of processing unit, the transmission delay of touch signal has been reduced, touch module only need send original signal for processing unit can, algorithm and other agreement are handled and all are accomplished by processing unit, software debugging work load reduces.

The technical content of the present invention is further described by the embodiments only, so that the reader can understand it more easily, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. The touch signal processing system is characterized by comprising a touch module and a main control board, wherein the main control board is provided with a processing unit and a gating switch, the processing unit is electrically connected with the gating switch and controls the gating of the gating switch, the gating switch is connected with external equipment, the processing unit is in communication connection with the touch module, and the processing unit is used for processing an original signal sent by the touch module and outputting a touch signal in a USB protocol format to the gating switch.

2. The touch signal processing system of claim 1, wherein the processing unit is connected to the touch module via a USB cable or a UART cable.

3. The touch signal processing system of claim 1, wherein the processing unit comprises a main chip, and the main chip is configured to convert the raw signal into a touch signal in a USB protocol format.

4. The touch signal processing system of claim 1, wherein the processing unit comprises a main chip and an MCU, the MCU is electrically connected to the main chip, the main chip receives the original signal and transmits the original signal to the MCU, and the MCU is configured to convert the original signal into a touch signal in a USB protocol format.