Man-machine interaction device using wireless USB interface

Abstract

The invention discloses a man-machine interaction device using a wireless USB interface, and relates to the technical field of embedded equipment display. The device comprises a man-machine interaction unit, a control unit, a wireless communication unit and a power supply unit. The wireless communication unit adopts a wireless USB protocol to carry out high-speed data communication with a host, and a traditional wired connection mode is replaced. The control unit is used for processing data and driving the man-machine interaction unit to display and interact, and the USB working mode of the control unit is configurable. The power supply unit provides a plurality of mutually exclusive power taking modes to adapt to different scenes. The problems that a traditional man-machine interaction device is inconvenient to install due to wired connection, a flat cable is prone to being damaged, and high-bandwidth data transmission is difficult are solved, and the device is suitable for various embedded scenes such as smart home, industrial monitoring and vehicle-mounted display.

Description

Technical Field

[0001] This invention relates to the field of embedded device display technology, and in particular to a human-computer interaction device using a wireless USB interface, which is suitable for various embedded display scenarios that require cooperation with a host, such as smart home control screens, industrial embedded monitoring displays, and vehicle-mounted embedded display devices. Background Technology

[0002] In the field of embedded devices, the demand for human-computer interaction functions is increasing. As a core component of human-computer interaction, display devices have the following technical shortcomings: The communication connection between the device and the host has long relied on wired interfaces, with ribbon cables being the most widely used connection method. However, this type of wired connection solution suffers from problems in practical applications, including poor installation convenience, low maintenance efficiency, and a high rate of product scrap due to the fragility of the ribbon cables, making it environmentally unfriendly. For unattended equipment, permanently equipping it with a display screen would increase costs and design complexity, while using temporary external devices (such as laptops) for interaction would be extremely inconvenient. With the widespread adoption of high-resolution displays, traditional interfaces such as SPI / I2C have insufficient bandwidth, while parallel interfaces have a large number of cables and high wireless costs, making it difficult to meet the needs of real-time transmission of high-definition data. Summary of the Invention

[0003] To overcome the above problems, the present invention aims to provide a human-computer interaction device using a wireless USB interface, which simplifies the installation and maintenance process, reduces the scrap rate, and ensures high-speed and stable transmission of high-resolution display data by adopting a wireless USB communication method based on 60GHz millimeter wave instead of traditional wired connection.

[0004] It should be noted that the applicant filed another patent application on the same day as this application, entitled "Human-Computer Interaction Device Using a Wireless Interface." That application primarily addresses the issue of wireless connectivity for basic human-computer interaction devices, employing a common signal pass-through mode. In contrast, this invention, by integrating a wireless USB communication protocol and an independent control unit, not only solves the specific problems of high-speed data transmission and protocol processing but also achieves programmability of device functions. The two applications address substantially different technical problems and employ different technical means, thus meeting different levels of market demand.

[0005] The technical solution adopted in this invention is as follows: To achieve the above objectives, the present invention adopts the following technical solution: A human-computer interaction device using a wireless USB interface, the core of which lies in replacing traditional wired connections with a wireless USB communication link. The device mainly comprises four functional units: Human-computer interaction unit: It includes at least one display module and optionally integrates a touch module for displaying graphical information and inputting user commands; Wireless communication unit: As a bridge for communication with the host, its core components support multi-gigabit wireless data transmission to meet the real-time transmission requirements of high-definition display data. Preferably, a millimeter-wave communication chip based on the 60GHz band is used to realize a high-speed wireless USB link; Control Unit: Serving as the data processing and control center of the device, this unit is typically composed of a microcontroller. This unit interacts with the host computer via a wireless communication unit and drives and manages the human-machine interface unit. The microcontroller's USB role (host / slave) is configurable to enhance its compatibility with different host computers. Furthermore, this unit includes a storage chip to support secondary development by users, enabling customized functions. Power Supply Unit: Provides stable power to all units within the device. This unit is designed with flexible power supply strategies, typically including contact interfaces that draw power directly from the host and contactless interfaces that rely on wireless charging or built-in batteries. Mechanical or structural design ensures the singularity of the power supply method and guarantees circuit safety. Beneficial effects

[0006] Compared with the prior art, the present invention has the following advantages: Easy to install: No signal cables need to be laid; simply ensure wireless signal coverage to complete the installation, making it especially suitable for small spaces. Simple maintenance: No physical cable connection, easy disassembly, and high efficiency in troubleshooting and replacement; Environmental and economic benefits: It avoids the use of easily damaged cables, reduces the scrap rate of the entire machine due to cable damage, and reduces electronic waste; Highly flexible: It can be installed and used as a temporary debugging tool, perfectly solving the temporary human-machine interaction needs of unattended equipment; High-speed and real-time: Utilizing 60GHz millimeter wave technology to achieve high-speed wireless USB communication, the bandwidth is much higher than that of traditional serial interfaces, which can meet the real-time data transmission requirements of high-resolution displays. Attached Figure Description

[0007] Figure 1 This is a schematic diagram illustrating the connection between the present invention and a USB host function host. Figure 2 This is a schematic diagram illustrating the connection between the present invention and a USB slave host. Figure 3 This is a top-level system principle block diagram of the present invention; Figure 4 Schematic diagram of a human-computer interaction unit; Figure 5 This is the schematic diagram of the control unit; Figure 6 This is a schematic diagram of a wireless communication unit. Figure 7 This is a schematic diagram of the power supply unit. Detailed Implementation

[0008] The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of protection of the present invention is not limited to these specific embodiments. Application methods and principles

[0009] like Figure 1 and Figure 2 As shown, the host's control data stream reaches the wireless communication unit in the human-computer interaction device using the wireless USB interface described in this invention via the USB interface, through an optional eUSB repeater and a contactless connector chip, and then reaches the control unit via the USB interface. The control unit then controls the human-computer interaction unit according to the control data stream; conversely, the information of the human-computer interaction unit (such as touch signals) will be transmitted back to the host via the same communication link, thereby realizing data interaction.

[0010] Figure 1 and Figure 2 The only difference is the USB role of the host and the human-computer interaction device; the data link and flow at the application layer are the same. Example

[0011] Figures 3-7 A specific circuit implementation embodiment is provided. In this embodiment, the microcontroller drives the display screen through the parallel port and reads touch signals through the I2C interface. Top-level system

[0012] Please refer to Figure 3 To understand.

[0013] The human-computer interaction device using a wireless USB interface described in this invention includes a human-computer interaction unit, a control unit, a wireless communication unit, and a power supply unit.

[0014] The power output port VCC of the power supply unit is connected to the power input port VCC of the human-machine interaction unit, the control unit, and the wireless communication unit, and the common port GND is grounded; the common port GND of the human-machine interaction unit is grounded, and the display operation ports BG, LCDRST, NOE, WE, RS, NE1, and DB[0..15] are respectively connected to the corresponding ports of the control unit, wherein the bus port DB[0..15] uses a bus connection, and the touch signal ports CTP_SCL, CTP_SDA, CTP_INT, and CTP_RST are respectively connected to the corresponding ports of the control unit; the common port GND of the wireless communication unit is grounded, and the eUSB communication ports eDP and eDN are respectively connected to the corresponding ports of the control unit; the common port GND of the control unit is grounded. Human-computer interaction unit

[0015] Please refer to Figure 4 To understand.

[0016] The human-computer interaction unit includes a touch screen P3, a voltage regulator chip U9, a transistor Q1, resistors R7 and R8, and capacitors C25 to C28; external connection ports include a power input port VCC, display operation ports BG, LCDRST, NOE, WE, RS, NE1, DB[0..15], touch signal ports CTP_SCL, CTP_SDA, CTP_INT, CTP_RST, and a common terminal port GND; Pins 5, 16, 37, 38, 40, and 45 of the touchscreen P3 are grounded; pins 6, 7, 33, 39, and 46 are connected to the Vout pin of the voltage regulator chip U9; pins 9 to 12 and 15 are connected to the display operation ports NE1, RS, WE, NOE, and LCDRST, respectively; pins 17 to 32 are connected to the bus port DB[0..15] in sequence; pins 34 to 26 are connected to the collector of transistor Q1 via resistor R8; and pins 41 to 44 are connected to the touch signal ports CTP_RST and CT, respectively. P_INT, CTP_SDA, CTP_SCK; the base of transistor Q1 is connected to the display operation port BG via resistor R7, and the emitter is grounded; the Vin pin of voltage regulator chip U9 is connected to the power input port VCC, and the GND pin is grounded; capacitor C25 is connected in parallel between the Vin pin of U9 and ground; capacitor C26 is connected in parallel between the Vout pin of U9 and ground; capacitor C27 is connected in parallel between pin 46 of P3 and ground; capacitor C28 is connected in parallel between pin 6 of P3 and ground; the common port GND is grounded.

[0017] The touchscreen model is P035C013-CTP-FT6336U. Control Unit

[0018] Please refer to Figure 5 To understand.

[0019] The control unit includes a microcontroller U5, voltage regulator chips U3 and U4, a storage chip U6, an eUSB repeater chip U7, a USB_PHY chip U8, a passive crystal oscillator Y1, a single-pole double-throw switch S1, capacitors C5 to C24, C29, and C30, and resistors R1 to R6. External connection ports include power input port VCC, display operation ports BG, LCDRST, NOE, WE, RS, NE1, DB[0..15], touch signal ports CTP_SCL, CTP_SDA, CTP_INT, CTP_RST, eUSB communication ports eDP, eDM and common port GND; Pins 6, 11, 19, 21, 22, 28, 50, 75, and 100 of the microcontroller U5 are connected to the Vout pin of the voltage regulator chip. Pin 14 is grounded via capacitor C9. Pins 15 to 18 are connected to pins 29, 27, 31, and 2 of the USB_PHY chip U8, respectively. Pins 20, 27, 74, and 99 are grounded. Pins 26, 30, 35, and 36 are connected to pins 3, 1, 4, and 5 of U8, respectively. Pins 61, 62, 81, 82, 38 to 46, and 55 to 57 are connected sequentially to the main circuit. The line port DB[0..15], pins 47, 48, 51 and 52 are connected to pins 6, 7, 9 and 10 of U8 respectively, pin 49 is grounded through capacitor C17, pin 53 is connected to the common terminal 2 of the single-pole double-throw switch S1, pin 58 is connected to the display operation port RS, pin 65 is connected to pin D1 of the eUSB repeater chip U7, and pin 73 is grounded through capacitor C20; pins 77 to 80, 83 and 84 are connected to pins 1, 6, 2, 5, 7 and 3 of the storage chip U6 respectively, and pins 85 to 89 are connected to the display operation ports NOE, WE and BG respectively. NE1 and LCD_RST, pin 91 is connected to pin 13 of U8, pins 92, 93, 95 and 96 are connected to the touch signal ports CTP_SCL, CTP_SDA, CTP_INT and CTP_RST respectively, and pin 94 is grounded through resistor R1; capacitor C7 is connected in parallel between pin 6 of U5 and ground; capacitor C8 is connected in parallel between pin 11 of U5 and ground; capacitor C10 is connected in parallel between pin 19 of U5 and ground; capacitor C12 is connected in parallel between pin 21 of U5 and ground; capacitor C11 is connected in parallel between pin 22 of U5 and ground; capacitor C1... 6 is connected in parallel between pin 28 of U5 and ground; capacitor C18 is connected in parallel between pin 50 of U5 and ground; capacitor C19 is connected in parallel between pin 75 of U5 and ground; capacitor C15 is connected in parallel between pin 100 of U5 and ground; capacitor C6 is connected in parallel between the Vin pin of U4 and ground; capacitor C14 is connected in parallel between the Vout pin of U4 and ground; the Vin pin of the voltage regulator chip U4 is connected to the power input port VCC, and the GND pin is grounded; pin 4 of the memory chip U6 is grounded, and pin 8 is connected to the Vout pin of U4; capacitor C23 is connected in parallel between pin 8 of U6 and ground.The eUSB repeater chip U7 has pins A1 and A2 connected to the eUSB communication ports eDP and eDN respectively, pins A3 and D3 grounded, pin B1 connected to the Vout pin of the voltage regulator chip U3 via resistor R6, pin B2 connected to the Vout pin of U4, pin B3 grounded via resistor R3, pin C1 connected to the Vout pin of the voltage regulator chip U3 via resistor R5, pin C2 connected to the Vout pin of the voltage regulator chip U3 via resistor R4, pin C3 grounded via resistor R2, pins D2 and E3 connected to the Vout pin of the voltage regulator chip U3, and pins E1 and E2 connected to pins 18 and 19 of the USB_PHY chip U8 respectively; the Vin pin of the voltage regulator chip U3 is connected to the power supply. The input port VCC and GND pins are grounded; capacitor C22 is connected in parallel between pin B2 of U7 and ground; capacitor C29 is connected in parallel between pin D2 of U7 and ground; capacitor C30 is connected in parallel between pin E3 of U7 and ground; capacitor C4 is connected in parallel between pin Vin of U3 and ground; capacitor C13 is connected in parallel between pin Vout of U3 and ground; pins 0 and 24 of the USB_PHY chip U8 are grounded, pins 20, 21, and 32 are connected to the Vout pin of U4, and pins 25 and 26 are connected to pins 3 and 1 of the passive crystal oscillator Y1, respectively; capacitor C21 is connected in parallel between pin 32 of U8 and ground; capacitor C24 is connected in parallel between pin 21 of U8 and ground. The single-pole double-throw switch S1 has pin 1 connected to the Vout terminal of U4 and pin 3 grounded; the common terminal GND is grounded.

[0020] The microcontroller U5 is model STM32F407VET6.

[0021] The microcontroller U5 uses the FSMC interface to drive the display screen.

[0022] The USB_PHY chip U8 is model CH132B.

[0023] The eUSB repeater chip U7 is model TUSB2E11.

[0024] The memory chip U6 is model number W25Q128FVSIGTR.

[0025] The single-pole double-throw switch S1 is used to configure the USB role of the control unit. When pins 2 and 3 are connected, the control unit is a USB slave; when pins 2 and 1 are connected, the control unit is a USB master.

[0026] The resistors R4 to R6 are used for USB link tuning and need to be selected according to the actual situation. Wireless communication unit

[0027] Please refer to Figure 6 To understand.

[0028] The wireless communication unit includes a contactless connector chip U1, a voltage regulator chip U2, and capacitors C1 to C4. External connection ports include the power input port VCC, eUSB communication ports eDP and eDN, and the common port GND.

[0029] The non-contact connector chip U1 has pins A3, A4, A5, C6, L6, N3, N4, and N5 grounded. Pins C3, H1, and L3 are connected to the Vout pin, C4 and C5 pins, and L4 and L5 pins of the voltage regulator chip U2, respectively, to the eUSB communication ports eDP and eDN to establish a reliable differential signal connection. The voltage regulator chip U2 has its Vin pin connected to the power input port VCC, and its GND pin grounded. Capacitor C1 is connected in parallel between U1's L3 pin and ground. Capacitor C2 is connected in parallel between U1's C3 pin and ground. Capacitor C3 is connected in parallel between U2's Vin pin and ground. Capacitor C4 is connected in parallel between U2's Vout pin and ground. Power supply unit

[0030] Please refer to Figure 7 To understand.

[0031] The power supply unit includes interfaces P1 and P2, an optional wireless charging receiver module M1, an optional polymer lithium battery BT1, and an optional charging module.

[0032] External connection ports include the power output port VCC and the common port GND.

[0033] Pin 1 of interface P1 is connected to the power output port VCC, and pin 2 is grounded; pin 1 of interface P2 is connected to the power output port VCC, and pin 2 is grounded; the common terminal GND is grounded. The interface P1 is a contact-type power interface with two metal contacts, used to draw power from the host through a flexible structure.

[0034] The interface P2 is a contactless power supply interface, which is a standard connector (such as XH2.54) that can be inserted into the wireless charging receiver module M1 or the polymer lithium battery BT1.

[0035] The contact power interface P1 and the non-contact power interface P2 are laid out on the printed circuit board (PCB) with overlapping positions (the package of P2 will physically cover P1). This mechanical structure physically ensures that only one of P1 and P2 can be soldered and used during assembly, thereby achieving mutually exclusive power supply.

[0036] Both the wireless charging module and the polymer lithium battery use XH2.54 terminal blocks for interface P2.

[0037] The wireless charging receiver module M1 is used to wirelessly draw power from the host. This is applicable to hosts with wireless charging functionality. It is a module that can be implemented using conventional technology that is compatible with the wireless charging transmitter module on the host. The output voltage is 3.3V~5V, and the output power needs to meet the maximum power consumption requirements of the entire human-computer interaction device.

[0038] The polymer lithium battery BT1 is used when the host cannot provide power to the human-computer interaction device. It has a capacity of 1000~5000mAh and an output voltage of 3.7V. When this power supply method is selected, the charging module can be installed.

[0039] The charging module integrates a lithium battery charging management IC, which is a conventional technology in this field. Working principle of the invention

[0040] The 60 GHz unlicensed millimeter-wave V-band has opened up new opportunities for contactless connectivity. By enabling unprecedented multi-gigabit data transmission rates, this RF technology, when applied to embedded devices, eliminates the need for physical cables, rotary joints, and connectors. This invention replaces signal lines in traditional human-machine interface (HMI) devices with contactless connectors based on 60 GHz millimeter-wave communication, reducing the structural coupling between the HMI and the host computer, thus simplifying installation and maintenance. The host computer only needs a corresponding contactless connector chip to communicate with the HMI, eliminating the need for wired connections.

[0041] Meanwhile, by introducing a separate microcontroller chip into the human-computer interaction device, this invention can not only support parallel port control of the display screen, but also meet the user's secondary development needs.

Claims

1. A human-computer interaction device using a wireless USB interface, characterized in that, include: The human-computer interaction unit is used to realize information display and user interaction functions; A control unit, connected to the human-machine interaction unit, is used to process data and control the human-machine interaction unit; A wireless communication unit, connected to the control unit, is used to establish a communication link with the host via a wireless USB protocol; as well as The power supply unit is used to supply power to the human-machine interaction unit, the control unit, and the wireless communication unit.

2. The human-computer interaction device using a wireless USB interface according to claim 1, characterized in that, The wireless communication unit includes a millimeter-wave communication chip, which operates at a frequency of 60 GHz.

3. The human-computer interaction device using a wireless USB interface according to claim 2, characterized in that, The millimeter-wave communication chip is a non-contact connector chip, used to establish a point-to-point wireless USB link with the corresponding non-contact connector chip on the host side.

4. The human-computer interaction device using a wireless USB interface according to claim 1, characterized in that, The human-computer interaction unit includes a display module for receiving and displaying image data from the control unit.

5. The human-computer interaction device using a wireless USB interface according to claim 4, characterized in that, The human-computer interaction unit also includes a touch module, which is connected to the control unit and is used to receive touch input signals from the user.

6. The human-computer interaction device using a wireless USB interface according to claim 1, characterized in that, The control unit includes a microcontroller, which can be configured to operate in either USB host mode or USB slave mode.

7. The human-computer interaction device using a wireless USB interface according to claim 1, characterized in that, The control unit also includes a storage chip for storing user programs, enabling the control unit to execute user-defined interactive logic.

8. The human-computer interaction device using a wireless USB interface according to claim 1, characterized in that, The power supply unit includes a contact power supply interface and a non-contact power supply interface, and the contact power supply interface and the non-contact power supply interface are arranged in overlapping positions on the printed circuit board, so that only one interface can be selected for installation and use during physical assembly.

9. The human-computer interaction device using a wireless USB interface according to claim 8, characterized in that, The contactless power interface can be selectively connected to a wireless charging receiver module or a built-in battery.

10. The human-computer interaction device using a wireless USB interface according to claim 9, characterized in that, When the built-in battery is connected, the power supply unit further includes a battery charging management module for charging the built-in battery.

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