Touch data processing board card and multi-cascade sensor touch system
By designing an integrated multi-function touch data processing board, the problem that a single touch sensor cannot cover large-area display is solved, the high scalability and flexibility of the touch system is achieved, and the development complexity and cost are reduced.
Patent Information
- Application Number
- CN202422052587.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-22
AI Technical Summary
When existing touch technology covers a large display area, a single touch sensor cannot effectively cover the entire area, and the scalability of traditional solutions is poor, resulting in increased development complexity and cost.
By designing a touch data processing board, integrating touch sensor, data input interface, data output interface, signal switching switch, touch data processor and signal enhancement module, the same model of board is realized in a multi-board system, and supports multi-level series connection to cover a larger display area.
Improves the scalability and flexibility of touch systems, reduces development complexity and cost, and reduces the need to design different hardware and software for display devices of different sizes and functional requirements.
Smart Images
Figure CN222927031U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of touch control technology, and particularly to a touch control data processing board and a multi-cascaded sensor touch control system. Background Art
[0002] In existing touch control technology solutions, a touch control function is usually implemented by a single touch sensor in cooperation with a processor core board. However, when a large display area needs to be covered, a single touch sensor cannot effectively cover the entire area, and the scalability of traditional solutions is poor. For display devices with different size requirements, different models of hardware and software need to be designed, resulting in a significant increase in development complexity and cost. Summary of the Utility Model
[0003] Embodiments of this application provide a touch control data processing board and a multi-sensor touch control system, which can use multiple touch control data processing boards of the same model to cover a larger display area, improve the scalability of the touch control system, and reduce the development complexity and cost. The above technical solutions are as follows:
[0004] In a first aspect, embodiments of this application provide a touch control data processing board, where the touch control data processing board includes a touch sensor, a data input interface, a data output interface, a signal switching switch, a touch control data processor, and a signal enhancement module;
[0005] The data input interface and the touch sensor are connected to the signal switching switch;
[0006] The signal switching switch is used to select and connect to a first branch or a second branch. The touch control data processor is provided in the first branch, and the signal enhancement module is provided in the second branch;
[0007] The data output interface is connected to the output ends of the first branch and the second branch.
[0008] In the above technical solution, by integrating a touch sensor, a data input interface, a data output interface, a signal switching switch, a touch data processor, and a signal enhancement module in a touch data processing board, the signal switching switch can select to connect to a first branch with a touch data processor or a second branch with a signal enhancement module. When the signal switching switch selects the first branch, the touch data processing board can operate independently as a single touch interface device or serve as an output end in a multi-board system; when the signal switching switch selects the second branch, the touch data processing board can serve as a cascaded relay node in a multi-board system, so that touch data processing boards of the same model can be used as any level in a multi-board system, with strong applicability and flexibility. There is no need to design a new board model according to the position of the touch data processing board in the multi-board system, effectively reducing the SKU (Stock Keeping Unit), and reducing the development complexity and cost. At the same time, multiple touch data processing boards can be used to achieve multi-level cascading to cover a larger display area, significantly improving the scalability and flexibility of the system, and reducing the need to design different hardware and software for display devices with different sizes and functional requirements.
[0009] In a possible implementation, the above data input interface is used to connect to the above data output interface of other touch data processing boards.
[0010] In the above technical solution, multiple touch data processing boards can be cascaded through the data input interface to cover a larger display area, can flexibly adapt to display devices of different sizes and shapes, and there is no need to design separate hardware and software for each size, significantly improving the scalability of the system.
[0011] In a possible implementation, the above data output interface is provided with a first pin, the above data input interface is provided with a corresponding second pin, and the above first pin of the above data output interface is used to communicate with the above second pin of the above data input interface of other touch data processing boards.
[0012] In the above technical solution, the connection state of the first pin can be detected to determine whether the data output interface is multi-level connected to other touch data processing boards.
[0013] In a possible implementation, the above signal switching switch selects the connected branch based on the connection state of the above first pin.
[0014] In the above technical solution, the connection state of the first pin can be judged, and then the switching path of the signal switching switch can be controlled to ensure that the touch data processing board can select the most appropriate signal processing path according to the actual connection state, ensuring the accuracy and timeliness of signal switching.
[0015] In a possible implementation, when the first pin of the above data output interface is not connected to the second pin of the above data input interface of other touch data processing boards, the above signal switching switch selects to connect the first branch;
[0016] When the first pin of the above data output interface is connected to the second pin of the above data input interface of other touch data processing boards, the above signal switching switch selects to connect the second branch.
[0017] In the above technical solution, by detecting the connection status of the first pin, it is possible to automatically identify whether there are other cascaded touch data processing boards and automatically switch to the corresponding working mode (the first branch or the second branch), realizing automatic configuration and intelligent management.
[0018] In a possible implementation, the above first pin is provided with a low level, and the above second pin is provided with a high level; the above signal switching switch selects to connect the first branch when the first pin is at a low level, and the above signal switching switch selects to connect the second branch when the first pin is at a high level.
[0019] In the above technical solution, by detecting the level status of the pins, it is possible to automatically determine the connection path of the signal switching switch without manual intervention, realizing automatic identification, configuration and cascading of multiple boards, significantly improving the flexibility, scalability and reliability of the system, while simplifying the design and reducing the cost
[0020] In a possible implementation, the above touch data processing board performs data transmission based on the Universal Serial Bus protocol.
[0021] In the above technical solution, the touch data processing board uses the USB protocol, which has strong compatibility, is convenient to use, and has high stability and reliability.
[0022] In a possible implementation, the above data input interface and the above touch sensor are connected to the above signal switching switch by a Universal Serial Bus hub.
[0023] In the above technical solution, through integration and distribution by the serial bus hub, the connection and communication structure of the touch data processing board can be simplified, thereby realizing unified transmission and processing of signals.
[0024] In a possible implementation, the above signal switching switch includes a first signal switching switch and a second signal switching switch;
[0025] The input end of the first signal switching switch is connected to the universal serial bus hub; the output ends of the first signal switching switch are respectively connected to the input end of the touch data processor in the first branch and the input end of the signal enhancement module in the second branch;
[0026] The input ends of the second signal switching switch are respectively connected to the output end of the touch data processor in the first branch and the output end of the signal enhancement module in the second branch; the output end of the second signal switching switch is connected to the data output interface.
[0027] In the above technical solution, by selecting the signal processing path through the first signal switching switch and the second signal switching switch, the signal branch switching can be made stable, ensuring that whether it is the directly processed signal or the enhanced signal, it can be efficiently transmitted to the data output interface, improving the adaptability, reliability and processing efficiency of the system.
[0028] In a second aspect, an embodiment of the present application provides a multi-cascaded sensor touch system, including a plurality of touch data processing boards. The data input interface of the touch data processing board is connected to the data output interface of the next-level touch data processing board. The signal switching switch of the first-level touch data processing board selects to connect and communicate with the first branch provided with a touch data processor, and the signal switching switches of other-level touch data processing boards select to connect and communicate with the second branch provided with a signal enhancement module;
[0029] The touch data processing board adopts the touch data processing board in any of the above possible implementation manners. Description of the Drawings
[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0031] Figure 1 It is a schematic structural diagram of a conventional touch solution board provided by an embodiment of the present application;
[0032] Figure 2 It is a schematic structural diagram of a touch data processing board provided by an embodiment of the present application;
[0033] Figure 3 It is a schematic structural diagram of another touch data processing board provided by an embodiment of the present application;
[0034] Figure 4Pin diagram of the data input interface and data output interface provided by the embodiments of the present application;
[0035] Figure 5 Pin diagram of the connection between the data output interface provided by the embodiments of the present application and a conventional USB interface;
[0036] Figure 6 Pin diagram of the connection between the data input interface and the data output interface provided by the embodiments of the present application;
[0037] Figure 7 Structural diagram of a multi - cascaded sensor touch system provided by the embodiments of the present application. Detailed implementation manners
[0038] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.
[0039] In the description of the present application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations. In addition, in the description of the present application, unless otherwise specified, "a plurality of" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the front and rear associated objects.
[0040] Existing touch technology solutions usually use a touch sensor in combination with a processor core board to implement the touch function. As Figure 1 shown, in this exemplary solution, the touch sensor 110 is responsible for capturing touch events and transmitting the data to the core processor 120 for processing, and then outputting the reported point data to the operating system.
[0041] However, when the display area is large, a single touch sensor cannot effectively cover the entire display area, resulting in a poor touch experience. To solve this problem, the prior art often needs to redesign different models of hardware and software according to display devices with different size requirements, which means creating a new SKU for each different configuration. This will lead to an increase in the number of SKUs, increasing the complexity of inventory management and production, and raising the cost and development difficulty.
[0042] To overcome these problems, this solution proposes a touch data processing board that can achieve flexible configuration and optimization of touch data processing through a signal switching switch. The touch data processing board integrates a touch sensor, a data input interface, a data output interface, a signal switching switch, a touch data processor, and a signal enhancement module. The signal switching switch can selectively connect to a first branch with a touch data processor or a second branch with a signal enhancement module. When the signal switching switch selects the first branch, the touch data processing board can operate independently as a single touch interface device or serve as an output end in a multi-board system. When the signal switching switch selects the second branch, the touch data processing board can serve as a cascaded relay node in a multi-board system, enabling the same model of touch data processing board to be used as any level in a multi-board system, with strong applicability and flexibility. There is no need to design a new board model according to the position of the touch data processing board in the multi-board system, effectively reducing the SKU, development complexity, and cost. At the same time, multiple touch data processing boards can be used for multi-level cascading to cover a larger display area, significantly improving the scalability and flexibility of the system, and reducing the need to design different hardware and software for display devices with different sizes and functional requirements.
[0043] For details, please refer to Figure 2 , Figure 2 This is a touch data processing board provided by an embodiment of the present application. The touch data processing board includes a touch sensor 210, a data input interface 220, a signal switching switch 230, a touch data processor 240, a signal enhancement module 250, and a data output interface 260.
[0044] The touch sensor 210 can be used to detect touch events (such as touch, swipe, etc.) and generate corresponding touch signals (data). The touch sensor 210 can include a capacitive touch sensor, a resistive touch sensor, an infrared touch sensor, an acoustic wave touch sensor, or an LED lidar touch sensor, etc.
[0045] The capacitive touch sensor is composed of one or more layers of transparent conductive materials (such as ITO, Indium Tin Oxide) covering the surface of the display screen to form a capacitive network, and determines the touch position by detecting capacitance changes.
[0046] The resistive touch sensor consists of two conductive layers (usually ITO) separated. When touched, the two conductive layers come into contact, forming a current change, and determines the touch position by detecting the pressure change.
[0047] The infrared touch sensor arranges infrared transmitters and receivers at the edges of the screen to form an infrared grid, and determines the touch position by detecting infrared occlusion.
[0048] The acoustic wave touch sensor arranges acoustic wave transmitters and receivers at the edge of the screen, and determines the touch position by detecting changes in the propagation of surface acoustic waves (SAWs).
[0049] The LED (Light Emitting Diode) lidar touch sensor arranges LED transmitters and lidar receivers around the screen to form a laser scanning grid, and determines the touch position by detecting the signals reflected by the laser beams emitted by the LEDs.
[0050] The touch data processing board can select a suitable sensor type according to specific application requirements, so as to achieve efficient and flexible touch data processing, and is applicable to display devices of various sizes and requirements.
[0051] The data input interface 220 can be used to receive touch signals (data) transmitted by other touch data processing boards or external devices. The data input interface 220 can be a standard communication interface, such as a USB (Universal Serial Bus) interface, an I2C (Inter-Integrated Circuit) interface, an SPI (Serial Peripheral Interface) interface, a UART (Universal Asynchronous Receiver / Transmitter) interface, etc., depending on the system design requirements and data transmission rate.
[0052] The signal switching switch 230 can be used to select and connect different signal processing paths, so that appropriate signal processing or enhancement methods can be selected according to different usage scenarios and requirements, in order to achieve flexible configuration and optimization of touch data processing. The signal switching switch 230 can be an electronic switch (such as a MOSFET or a relay), an analog switch, a multiplexer (MUX) or a mechanical switch, etc.
[0053] The touch data processor 240 can be used to receive and process the touch data (signals) generated by the touch sensor 210, and convert it into available reporting point data (including the position of the touch point, the pressure of the touch, the time of the touch, etc.). The touch data processor 240 can be a microprocessor or an application-specific integrated circuit (ASIC), which has powerful data processing capabilities and low power consumption, and can integrate touch algorithms and data processing modules.
[0054] The signal enhancement module 250 is used to enhance the intensity and quality of the touch signal, ensuring accurate detection of touch events even in a large display area or a complex environment. When the touch signal is transmitted in a multi-stage connection, due to factors such as the increase in line length, the characteristics of the transmission medium, and environmental noise, the touch signal will be attenuated and interfered during long-distance transmission. Each cascaded node may introduce a certain amount of signal loss and noise accumulation, resulting in the touch data processor 240 being unable to process reliably and affecting the accuracy of the output touch data. The signal enhancement module 250 can restore and enhance the signal intensity, reduce the cumulative error, and ensure the integrity of the touch signal during long-distance transmission. The signal enhancement module 250 can include a signal amplifier, a filter, a signal conditioning circuit, etc., and the specific design can depend on the system requirements.
[0055] The data output interface 260 can be used to output the processed touch data to other touch data processing boards or the host computer system. The data output interface 260 is similar to the data input interface 220. The data output interface 260 can be a USB interface, an I2C interface, an SPI interface, a UART interface, etc. The data output interface 260 should ensure compatibility and matching with the data input interface 220.
[0056] In the embodiment of the present application, the data input interface 220 and the touch sensor 210 are connected to the signal switching switch 230; the signal switching switch 230 is used to select and connect the first branch or the second branch. The first branch is provided with a touch data processor 240, and the second branch is provided with a signal enhancement module 250; the data output interface 260 is connected to the output ends of the first branch and the second branch.
[0057] It can be understood that when the data output interface 260 of the touch data processing board is directly connected to the host computer system, if there is no data input at the data input interface 220, after the touch sensor 210 detects a touch event and generates a corresponding touch signal, the touch sensor 210 transmits the touch signal to the signal switching switch 230. The signal switching switch 230 selects to connect the first branch, sends the received touch signal to the touch data processor 240 for data processing, obtains the available touch data after processing, and sends the available touch data to the operating system of the host computer through the data output interface 260. If the data input interface 220 receives a touch signal, after the touch sensor 210 detects a touch event and generates a corresponding touch signal, the data input interface 220 and the touch sensor 210 transmit their respective corresponding touch signals to the signal switching switch 230. The signal switching switch 230 selects to connect the first branch, sends the received touch signal to the touch data processor 240 for data processing, obtains the available touch data after processing, and sends the available touch data to the operating system of the host computer through the data output interface 260.
[0058] When the data output interface 260 of the touch data processing board is connected to other touch data processing boards, if there is no data input at the data input interface 220, after the touch sensor 210 detects a touch event and generates a corresponding touch signal, the touch sensor 210 transmits the touch signal to the signal switching switch 230. The signal switching switch 230 selects to connect the second branch, sends the received touch signal to the signal enhancement module 250 to enhance the intensity and quality of the touch signal, obtains the touch signal after signal enhancement, and sends the touch signal after signal enhancement to other touch data processing boards through the data output interface 260 for further processing. If the data input interface 220 receives a touch signal, after the touch sensor 210 detects a touch event and generates a corresponding touch signal, the data input interface 220 and the touch sensor 210 transmit their respective corresponding touch signals to the signal switching switch 230. The signal switching switch 230 selects to connect the second branch, sends the received touch signal to the signal enhancement module 250 to enhance the intensity and quality of the touch signal, obtains the touch signal after signal enhancement, and sends the touch signal after signal enhancement to other touch data processing boards through the data output interface 260 for further processing.
[0059] Among them, the signal switching switch 230 can manually select the first branch or the second branch by the user, or automatically select the signal path by detecting input signals or connection statuses, etc.
[0060] It can be understood that no data input at the data input interface 220 means that no other touch data processing boards are connected, and the current touch data processing board only needs to process the data of its own touch sensor 210. If there is data input at the data input interface 220, the signal switching switch 230 will receive the data of its own touch sensor 210 and the data input through the data input interface 220 from other touch data processing boards.
[0061] When the data output interface 260 of the touch data processing board is connected to the host computer, the signal switching switch 240 switches to the first branch (manually or automatically) and uses the touch data processor 240 for processing; when the data output interface 260 of the touch data processing board is connected to other touch data processing boards, it switches to the second branch (manually or automatically), does not process the data, and only transmits the data after signal enhancement.
[0062] In some embodiments, the data input interface 220 is used to connect to the data output interface 260 of other touch data processing boards to achieve multi-level connection. Multiple touch data processing boards can be connected in series through the data input interface 220 to cover a larger display area, can flexibly adapt to display devices of different sizes and shapes, and there is no need to separately design hardware and software for each size, significantly improving the scalability of the system.
[0063] It can be understood that when the touch data processing board is connected in multiple levels, the touch data processing board acts as a transfer board (the data input interface 220 is connected to the data output interface 260 of other touch data processing boards, and the data output interface 260 is connected to the data input interface 220 of other touch data processing boards). Both the data input interface 220 and the touch sensor 210 can output touch signals. After the touch data processing board is enabled, the touch sensor 210 can always output touch signals, which are not affected by the cascading state or position. It's just that when acting as a transfer board, the touch data processor 240 is not used for data processing. Therefore, when multiple touch data processing boards are connected in multiple levels, a larger display area can be covered.
[0064] When the touch data processing board is connected in multiple levels, the touch data processing board acts as the first-level board (the data input interface 220 is connected to the data output interface 260 of other touch data processing boards, and the data output interface 260 is connected to the host computer). The touch data processor 240 receives the integrated signals from each cascaded board, that is, the touch signals from different touch data processing boards are integrated into a complete data set. The touch data processor 240 processes the integrated signals and converts them into available reporting point data for output to be processed by the operating system or application program of the host computer system.
[0065] Among them, each touch data processing board or touch sensor can attach a unique identifier (ID) when sending data to distinguish different signal sources of the touch signals.
[0066] In some embodiments, the touch data processing board is designed to use USB data, and the touch data processing board performs data transmission based on the USB protocol. The touch data processing board using the USB protocol has strong compatibility, is convenient to use, and has high stability and reliability.
[0067] It can be understood that the touch signals output by the touch sensor 210 and the touch signals output by the data input interface 220 in the touch data processing board can be data (digital signals) based on the USB protocol.
[0068] It can be understood that digital signals are essentially binary data composed of high and low levels. Theoretically, they are not easily affected by noise, but they will still be attenuated and interfered during long-distance transmission. The transmission and reception processes of each node will introduce certain signal losses and noise accumulations. The signal enhancement module 250 can restore and enhance the signal strength, reduce the cumulative error, and ensure the integrity of the touch signals during long-distance transmission. That is, signals based on the USB protocol also require signal enhancement during multi-level transmission.
[0069] It should be noted that the generation of the touch signal by the touch sensor 210 can be regarded as a process of data acquisition rather than a complete data processing. The touch sensor 210 outputs raw or basic touch data without performing complex data operations or processing. When data is transmitted based on the USB protocol, the touch signal is the data in the USB protocol format. The touch signal can include raw data (primary data) such as touch position data and touch force (pressure sensing) collected by the touch sensor 210. The touch data processor 240 is responsible for advanced data processing, which can include, for example, signal integration, calibration, filtering, event analysis, etc., and can convert the raw data into available reported point data (advanced data) after in-depth processing.
[0070] In some embodiments, as Figure 3 shown, the data input interface 220 and the touch sensor 210 are connected to the signal switching switch 230 by a universal serial bus hub 270 (USB HUB). Through the integration and distribution by the USB HUB, the connection and communication structure of the touch data processing board can be simplified, thereby realizing the unified transmission and processing of signals.
[0071] In some embodiments, as Figure 3 shown, the signal switching switch 230 includes a first signal switching switch 231 and a second signal switching switch 232; the input end of the first signal switching switch 231 is connected to the universal serial bus hub 270; the output end of the first signal switching switch 231 is respectively connected to the input end of the touch data processor 240 in the first branch and the input end of the signal enhancement module 250 in the second branch; the input end of the second signal switching switch 232 is respectively connected to the output end of the touch data processor 240 in the first branch and the output end of the signal enhancement module 250 in the second branch; the output end of the second signal switching switch 232 is connected to the data output interface 260. By selecting the signal processing path through the first signal switching switch 231 and the second signal switching switch 232, stable signal branch switching can be achieved, ensuring that both the directly processed signal and the enhanced signal can be efficiently transmitted to the data output interface 260, improving the adaptability, reliability, and processing efficiency of the system.
[0072] In some embodiments, as Figure 4 shown, the data output interface 260 is provided with a first pin DET1, and the data input interface 220 is provided with a corresponding second pin DET2. The first pin DET1 of the data output interface 260 is used to communicate with the second pin DET2 of the data input interface 220 of other touch data processing boards.
[0073] Specifically, the data input interface 220 and the data output interface 260 of the touch data processing board are designed based on the USB protocol. The same as a conventional USB interface, they provide four pins: GND, 5V, DP, and DM. Among them, the GND pin provides the reference voltage of the circuit, that is, the ground potential, for forming a loop; the ground wires of all devices are connected together through this pin to ensure the normal operation of the circuit. The 5V pin provides power for the connected USB device, and the standard USB interface provides a DC voltage of 5V. The DP pin transmits the positive differential signal of the USB data. The DM pin transmits the negative differential signal of the USB data.
[0074] On this basis, the data output interface 260 defines one more pin than the conventional USB interface, namely 1Pin-DET1, and the data input interface 220 defines one more pin than the conventional USB interface, namely 1Pin-DET2. In this embodiment, the first pin DET1 and the second pin DET2 are used to detect whether the touch data processing board is multi-level connected to other touch data processing boards. It can be understood that when the data output interface 260 is connected to other USB interfaces, the four pins of GND, 5V, DP, and DM can be normally connected, while other USB interfaces lack the pins matching the first pin DET1, resulting in the inability to connect the first pin DET1 (as Figure 5 shown). When the data output interface 260 is connected to the data input interface 220 of other touch data processing boards, the four pins of GND, 5V, DP, and DM can be normally connected, and the first pin DET1 can be connected to the second pin DET2 (as Figure 6 shown). Thus, the connection state of the first pin DET1 can be detected to determine whether the data output interface 260 is multi-level connected to other touch data processing boards.
[0075] In some embodiments, the signal switching switch 230 selects the connected branch based on the connection state of the first pin DET1. The methods for the connection state of the first pin DET1 include but are not limited to the following:
[0076] Level detection, the level state (high level or low level) of the first pin DET1 can be detected through a comparator or a voltage detection circuit.
[0077] Current detection, the connection state is judged by detecting the current flowing through the first pin DET1.
[0078] Impedance detection, the connection state is judged by measuring the impedance between the first pin DET1 and the ground or the power supply.
[0079] Frequency detection, the connection state is judged by detecting the signal frequency on the first pin DET1.
[0080] Signal pulse detection is used to determine the connection status by detecting signal pulses or signal patterns on the first pin DET1.
[0081] Through the above detection method, the connection status of the first pin DET1 can be accurately determined, and then the switching path of the signal switching switch 230 can be controlled to ensure that the touch data processing board can select the most appropriate signal processing path according to the actual connection status, guaranteeing the accuracy and timeliness of signal switching.
[0082] In some embodiments, when the first pin DET1 of the data output interface 260 is not connected to the second pin DET2 of the data input interface 220 of other touch data processing boards, the signal switching switch 230 selects to connect the first branch; when the first pin DET1 of the data output interface 260 is connected to the second pin DET2 of the data input interface 220 of other touch data processing boards, the signal switching switch 230 selects to connect the second branch.
[0083] Specifically, when the first pin DET1 is in a disconnected state, it indicates that the data output interface 260 of the current touch data processing board is not connected to the data input interface 220 of other touch data processing boards, but is connected to the conventional USB interface of the host computer. The current touch data processing board needs to process the received touch signals and generate reporting point data to be transmitted to the operating system of the host computer. Therefore, the signal switching switch 230 selects to connect the first branch and transmits the received touch signals (including the touch signals generated by the touch sensor 210 of the current touch data processing board and the touch signals generated by the touch sensors 210 of other cascaded touch data processing boards) to the touch data processor 240 for data processing.
[0084] When the first pin DET1 is in a connected state, it indicates that the data output interface 260 of the current touch data processing board is connected to the data input interface 220 of other touch data processing boards. At this time, the current touch data processing board is in a cascaded state and is not directly connected to the host computer. There is no need to process the touch signals, and only the received touch signals need to be enhanced and transmitted to the upper-level touch data processing board. Therefore, the signal switching switch 230 selects to connect the second branch and transmits the received touch signals to the signal enhancement module 250 to enhance the intensity and quality of the touch signals.
[0085] In this way, by detecting the connection status of the first pin, it is possible to automatically identify whether there are other cascaded touch data processing boards and automatically switch to the corresponding working mode (the first branch or the second branch) to achieve automatic configuration and intelligent management.
[0086] In some embodiments, the first pin DET1 is set to a low level, and the second pin DET2 is set to a high level; the signal switching switch 230 selects to connect to the first branch when the first pin DET1 is at a low level, and the signal switching switch 230 selects to connect to the second branch when the first pin DET1 is at a high level.
[0087] Specifically, the first pin DET1 and the second pin DET2 are used to provide control signals, and the level states (high level or low level) of these two pins determine the operating state of the signal switching switch 230. When the first pin DET1 is at a low level, the signal switching switch 230 detects this state and triggers the switch to switch to the first branch. When the first pin DET1 is at a high level, the signal switching switch 230 detects this state and triggers the switch to switch to the second branch.
[0088] In some embodiments, the signal switching switch 230 includes a first signal switching switch 231 and a second signal switching switch 232. The input end of the first signal switching switch 231 is connected to the universal serial bus hub 270, and the output end is respectively connected to the input ends of the touch data processor 240 in the first branch and the signal enhancement module 250 in the second branch. The input ends of the second signal switching switch 232 are respectively connected to the output ends of the touch data processor 240 in the first branch and the signal enhancement module 250 in the second branch, and the output end is connected to the data output interface 260.
[0089] When the first pin DET1 is at a low level, the first signal switching switch 231 is connected to the touch data processor 240 in the first branch, and the second signal switching switch 232 is also connected to the output end of the touch data processor 240 in the first branch, forming a complete processing path.
[0090] When the first pin DET1 is at a high level, the first signal switching switch 231 is connected to the signal enhancement module 250 in the second branch, and the second signal switching switch 232 is also connected to the output end of the signal enhancement module 250 in the second branch, forming an enhanced processing path.
[0091] Among them, the signal switching switch 230 detects the pin level state and controls the switch according to the level state, which can be realized through circuit design and logic control, such as based on a level detection circuit, a control logic circuit, etc.
[0092] In some embodiments, the first pin DET1 is set to a low level (default state), and the second pin DET2 is set to a high level (default pulled up to 5V).
[0093] In the initial state (when the data output interface 260 is not connected to the data input interface 220 of other boards), the first pin DET1 of the touch data processing board is default pulled low internally, which causes the signal switching switch 230 to be connected to the first branch (i.e., the path of the touch data processor 240), indicating that this touch data processing board works as the first-level core processing unit.
[0094] When multiple touch data processing boards are cascaded, the data input interface 220 of the touch data processing board is connected to the data output interface 260 of the next-level touch data processing board. Since the second pin DET2 of the data input interface 220 is default pulled high to 5V, after the first pin DET1 of the next-level touch data processing board is connected to the second pin DET2, the first pin DET1 will be pulled high by the second pin DET2. When this touch data processing board detects the high level of its first pin DET1, it will trigger its signal switching switch 230 to select and connect to the second branch (i.e., the path of the signal enhancement module 250), indicating that this touch data processing board works as a cascaded branch part.
[0095] In the embodiment of the present application, by adding a detection pin on the basis of the USB interface and detecting the level state of the detection pin, the connection path of the signal switching switch can be automatically determined without manual intervention, realizing the automatic identification, configuration and cascading of multiple boards, significantly improving the flexibility, scalability and reliability of the system, while simplifying the design and reducing the cost.
[0096] Next, please refer to Figure 7 , Figure 7 which is a multi-cascaded sensor touch system provided by the embodiment of the present application. The multi-cascaded sensor touch system includes multiple touch data processing boards. The data input interface of the touch data processing board is connected to the data output interface of the next-level touch data processing board. The signal switching switch of the first-level touch data processing board selects and connects to the first branch provided with the touch data processor, and the signal switching switches of other-level touch data processing boards select and connect to the second branch provided with the signal enhancement module.
[0097] Among them, Figure 7 taking the cascading of three sensors as an example, in other embodiments, the multi-cascaded sensor touch system can cascade more or fewer sensors. For example, based on the USB protocol, the multi-cascaded sensor touch system can cascade 6 sensors.
[0098] The signal transmission path of the multi-cascaded sensor touch system is as Figure 7As shown by the red line part, the third touch sensor 310 on the third-level touch data processing board 300 generates a third touch signal. After being enhanced by the third signal enhancement module 350, the third touch signal is transmitted to the second-level touch data processing board 400. The second data input interface 420 of the second-level touch data processing board 400 receives the third touch signal input from the third-level touch data processing board 300, inputs the second touch signal generated by the second touch sensor 410 and the above-mentioned third touch signal into the second signal enhancement module 450 for enhancement, and then transmits it to the first-level touch data processing board 500. The first data input interface 520 of the first-level touch data processing board 500 receives the second touch signal and the third touch signal input from the second-level touch data processing board 400, inputs the first touch signal generated by the first touch sensor 510 and the above-mentioned second touch signal and third touch signal into the first touch data processor 540 for data processing to generate reporting point data, and uploads the reporting point data to the operating system.
[0099] The embodiments described above are only descriptions of the preferred embodiments of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present application shall fall within the protection scope determined by the claims.
Claims
1. A touch data processing board, characterized in that: The touch data processing board includes a touch sensor, a data input interface, a data output interface, a signal switching switch, a touch data processor and a signal enhancement module; The data input interface and the touch sensor are connected to the signal switching switch; The signal switching switch is used to select the first branch or the second branch to be connected, the touch data processor is provided in the first branch, and the signal enhancement module is provided in the second branch; The data output interface is connected to the output ends of the first branch and the second branch.
2. The touch data processing board according to claim 1, characterized in that: The data input interface is used to connect with the data output interface of other touch data processing boards.
3. The touch data processing board according to claim 2, characterized in that: The data output interface is provided with a first pin, and the data input interface is provided with a corresponding second pin. The first pin of the data output interface is used to communicate with the second pin of the data input interface of other touch data processing boards.
4. The touch data processing board according to claim 3, characterized in that: The signal switching switch selects a connected branch based on the connection state of the first pin.
5. The touch data processing board according to claim 4, characterized in that: When the first pin of the data output interface is not connected to the second pin of the data input interface of other touch data processing boards, the signal switching switch selects to connect the first branch; When the first pin of the data output interface is connected to the second pin of the data input interface of another touch data processing board, the signal switching switch selects to connect the second branch.
6. The touch data processing board according to claim 3, characterized in that: The first pin is set to a low level, and the second pin is set to a high level; the signal switching switch selects to connect the first branch when the first pin is at a low level, and the signal switching switch selects to connect the second branch when the first pin is at a high level.
7. The touch data processing board according to claim 1, characterized in that: The touch data processing board performs data transmission based on the universal serial bus protocol.
8. The touch data processing board according to claim 7, characterized in that: The data input interface and the touch sensor are connected to the signal switching switch using a universal serial bus hub.
9. The touch data processing board according to claim 8, characterized in that: The signal switching switch includes a first signal switching switch and a second signal switching switch; The input end of the first signal switching switch is connected to the universal serial bus hub; the output end of the first signal switching switch is respectively connected to the input end of the touch data processor in the first branch and the input end of the signal enhancement module in the second branch; The input end of the second signal switching switch is respectively connected to the output end of the touch data processor in the first branch and to the output end of the signal enhancement module in the second branch; the output end of the second signal switching switch is connected to the data output interface.
10. A multi-cascade sensor touch control system, characterized in that: It comprises a plurality of touch data processing boards, wherein the data input interface of the touch data processing board is connected to the data output interface of the next level touch data processing board, the signal switching switch of the first level touch data processing board selects to connect to the first branch provided with the touch data processor, and the signal switching switches of the other level touch data processing boards select to connect to the second branch provided with the signal enhancement module; The touch data processing board card adopts the touch data processing board card described in any one of claims 1-9.