Dual-mode interactive projection equipment

Abstract

The utility model discloses dual-mode interactive projection equipment, which comprises a projector main body, an Android system mainboard and an interactive camera module are arranged in the projector main body, a USB toggle switch and external interfaces are arranged outside the projector main body, the external interfaces comprise an HDMI input interface and a USB output interface, and the HDMI input interface is connected with the USB output interface. The USB toggle switch is electrically connected with the Android system mainboard, the interactive camera module and the USB output interface, and through the design of the USB toggle switch, the switching of the interactive camera module between the Android mainboard and the external Windows computer is realized through the simple toggle switch; the technical problem that an existing Android interactive projector cannot use an interactive function when being connected with a Windows computer is solved, one piece of equipment supports the Android mode and the Windows mode at the same time, dual purposes of one piece of equipment are achieved, and the equipment utilization rate is increased.

Description

A dual-mode interactive projection device Technical Field

[0001] This utility model relates to the field of projection equipment technology, specifically a dual-mode interactive projection device. Background Technology

[0002] With the development of information technology and multimedia teaching, interactive projection systems have been widely used in education, conferences, and presentations. Currently, interactive projection systems on the market are mainly divided into two categories:

[0003] The first type is an interactive projection system based on the Windows system. This type of system usually consists of a computer, a projector, and an interactive kit. The interactive kit mainly includes an interactive camera, an infrared pen, and interactive software. The working principle is as follows: the computer is connected to the projector to project the computer screen onto a wall or whiteboard; the interactive camera is connected to the computer to capture the position of the infrared pen on the projected screen; the interactive software (such as the WeDidIt interactive system software from Hunan Guanchao Intelligent Technology Co., Ltd.) uses a calibration algorithm to convert the position of the infrared pen in the camera coordinate system to the position in the computer coordinate system and emits events that simulate a mouse or touch screen, thereby enabling direct control of the computer on the projected screen, which is equivalent to a large touch screen.

[0004] The second type is interactive projectors based on the Android system. These products integrate the interactive camera directly into the Android projector and connect it to the Android motherboard. Users can directly operate the projected image on the Android system using an infrared pen to achieve interactive functions.

[0005] However, existing technologies have the following shortcomings:

[0006] 1. When an interactive projector based on the Android system is connected to a Windows computer to display Windows content, its interactive function cannot be used because the interactive camera is only connected to the internal Android motherboard and cannot communicate with the external Windows computer.

[0007] 2. Users need to select different types of interactive projection devices according to different scenarios, which increases the cost of equipment purchase and the complexity of use.

[0008] 3. Existing interactive systems mainly rely on infrared pens as input tools. When the infrared pen is lost or damaged, the interactive function cannot be realized.

[0009] Therefore, there is an urgent need for an interactive projection device that can simultaneously support interactive functions between Android and Windows systems and provide multiple interaction methods. Summary of the Invention

[0010] To overcome the above-mentioned shortcomings, this utility model provides a dual-mode interactive projection device, which aims to solve the problem that users of existing interactive projection devices need to select different types of interactive projection devices according to different scenarios, which increases the purchase cost and usage complexity of the devices.

[0011] To achieve the above objectives, this utility model provides the following technical solution:

[0012] A dual-mode interactive projection device includes a projector body, which has an Android system motherboard and an interactive camera module built into it. The projector body is externally equipped with a USB toggle switch and external interfaces, including an HDMI input interface and a USB output interface. The USB toggle switch is electrically connected to the Android system motherboard, the interactive camera module, and the USB output interface.

[0013] The USB toggle switch has two working positions. When the USB toggle switch is turned to the first working position, the interactive camera module is electrically connected to the Android system motherboard to realize interactive control of the Android system projection screen. When the USB toggle switch is turned to the second working position, the interactive camera module is electrically connected to the USB output interface. The USB output interface is connected to an external Windows computer via a USB cable to realize interactive control of the Windows system projection screen.

[0014] As a preferred embodiment of this utility model, the interactive camera module is equipped with an IR-CUT function, which is used to switch between visible light mode and infrared mode.

[0015] As a preferred embodiment of this utility model, the USB toggle switch includes a toggle switch mechanical structure and a signal switching circuit.

[0016] As a preferred embodiment of this utility model, the signal switching circuit adopts one of the following: a multiplexer chip, a mechanical relay, or an electronic switch circuit.

[0017] As a preferred embodiment of this utility model, it also includes an infrared pen, which is used for writing and operating on the projection screen of the projector body.

[0018] As a preferred embodiment of this utility model, it also includes a wall-mounted infrared laser emitter, which is installed above the projection wall and is used to emit infrared lasers to form a laser screen parallel to the projection wall.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model uses a USB toggle switch design to enable the interactive camera module to switch between the Android motherboard and an external Windows computer. This solves the technical problem that existing Android interactive projectors cannot use interactive functions when connected to a Windows computer. One device can support both Android and Windows modes simultaneously, achieving dual-use and improving device utilization.

[0021] 2. This utility model realizes infrared laser touch technology by setting an infrared laser emitter on the wall. The infrared laser emitter installed above the wall forms a laser screen parallel to the wall, realizing finger touch function without infrared pen, enhancing the system's interactivity and ease of use.

[0022] 3. This utility model is equipped with an IR-CUT function through an interactive camera module, which can switch between visible light mode and infrared mode, achieving a perfect combination of automatic calibration and precise touch control. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the overall structure of the dual-mode interactive projection device;

[0024] Figure 2 is a schematic diagram of the working principle of the USB toggle switch. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] Example: Please refer to Figures 1-2. This example provides a dual-mode interactive projection device, including a projector body. The projector body has a built-in Android system motherboard and an interactive camera module. The projector body is externally equipped with a USB toggle switch and external interfaces, including an HDMI input interface and a USB output interface. The USB toggle switch is electrically connected to the Android system motherboard, the interactive camera module, and the USB output interface. The USB toggle switch has two working positions. When the USB toggle switch is set to the first working position, the interactive camera module is electrically connected to the Android system motherboard, realizing interactive control of the Android system projection screen. When the USB toggle switch is set to the second working position, the interactive camera module is electrically connected to the USB output interface. The USB output interface is connected to an external Windows computer via a USB cable, realizing interactive control of the Windows system projection screen. This utility model, by setting the USB toggle switch to have two working positions, can realize two working modes: Android mode and Windows mode. It achieves dual use, which can be used as an independent Android interactive projector, and can also maintain interactive function when connected to a Windows computer, greatly improving the applicability and utilization of the device.

[0027] In this embodiment, the USB toggle switch includes a toggle switch mechanical structure and a signal switching circuit. The signal switching circuit adopts one of a multiplexer chip, a mechanical relay, or an electronic switch circuit. In this embodiment, a USB switching chip is preferred. This chip can switch a USB device between two USB hosts and has the advantages of good signal integrity and reliable switching.

[0028] Specifically, the first working position of the USB toggle switch is set to the "Android" position. When the mechanical structure of the USB toggle switch is moved to the "Android" position, the signal switching circuit connects the interactive camera module to the Android system motherboard, so that the signal captured by the interactive camera module is directly transmitted to the Android system for processing, thereby realizing interactive control of the Android projection screen.

[0029] The second working position of the USB toggle switch is set to the "Windows" position. When the mechanical structure of the USB toggle switch is moved to the "Windows" position, the signal switching circuit connects the interactive camera module to the USB output interface and connects to an external Windows computer via a USB cable. This allows the signal captured by the interactive camera module to be transmitted to the WeDidIt interactive software in the Windows system for processing, enabling interactive control of the Windows projection screen.

[0030] In this embodiment, the dual-mode interactive projection device also includes an infrared pen, which is used for writing and operating on the projection screen of the projector body.

[0031] In this embodiment, the dual-mode interactive projection device also includes a wall-mounted infrared laser emitter, which is installed above the projection wall to emit infrared lasers to form a laser screen parallel to the projection wall and about 2mm away. When a finger or object touches the laser screen, reflected light is generated and captured by the interactive camera module. The system calculates the touch position through signal processing algorithms and generates corresponding touch events to realize direct finger touch function. This technology can be used simultaneously in Android mode and Windows mode, providing users with a more convenient interaction method. Especially in the case of loss or damage of the infrared pen, users can still realize interactive function through finger touch.

[0032] In this embodiment, the interactive camera module is equipped with an IR-CUT function, which is used to switch between visible light mode and infrared mode. The visible light mode and infrared mode are as follows:

[0033] Visible light mode (IR-CUT enabled): Used during calibration, the camera can see the projected image for automatic calibration;

[0034] Infrared mode (IR-CUT off): Used during interactive operation, the camera only captures infrared light and filters visible light, improving the recognition accuracy of infrared pen dots or laser reflected light;

[0035] The switching of IR-CUT is controlled by the WeDidIt interactive software system, which automatically switches between calibration and interactive operation without the need for manual intervention by the user. This design ensures both the convenience of calibration and the accuracy of interactive operation.

[0036] In this embodiment, to ensure touch accuracy, the dual-mode interactive projection device needs to be calibrated. The calibration process is as follows:

[0037] In Android mode, after the system starts up, it enters the WeDidIt interactive software system (Android version) and automatically enters the calibration interface. The interactive camera module can switch to IR-CUT to enter camera mode (visible light mode) and see the projected image. The calibration pattern information will appear directly on the projected image for automatic calibration, or manual calibration can be performed. Switch to IR mode (infrared mode) and the user can follow the prompts to click the calibration points on the screen with an infrared pen to complete the calibration in Android mode.

[0038] In Windows mode, users need to run the WeDidIt interactive software system (Windows version) on a Windows computer. The interactive camera can enter camera mode (visible light mode) by switching to IR-CUT and see the projected image. The calibration pattern information will appear directly on the projected image for automatic calibration or manual calibration. Switch to IR mode (infrared mode) and follow the prompts to click the calibration points on the screen with an infrared pen to complete the calibration in Windows mode.

[0039] The calibration algorithm uses a multi-point mapping method, which establishes a mapping relationship between the camera coordinate system and the screen coordinate system to achieve high-precision touch positioning. The automatic calibration function identifies specific calibration patterns on the projected image through the camera, eliminating the need for manual clicking by the user and greatly improving calibration efficiency and accuracy.

[0040] The workflow of the dual-mode interactive projection device in Android and Windows modes is as follows:

[0041] Android Mode Workflow: Switch the USB toggle switch to the "Android" position -- the interactive camera module connects to the Android system motherboard -- the projector projects the Android system interface onto the wall or whiteboard -- the user operates on the projected image using an infrared pen -- the interactive camera module captures the infrared pen's light spot -- the Android system processes the touch signal -- enabling direct interactive control of the Android interface.

[0042] Windows Mode Workflow: Switch the USB toggle switch to the "Windows" position -- Connect the external Windows computer to the projector's HDMI input port via an HDMI cable -- Connect the external Windows computer to the projector's USB output port via a USB cable -- The projector projects the Windows system interface onto a wall or whiteboard -- The user interacts with the projected image using an infrared pen -- The interactive camera module captures the infrared pen's light spot -- The signal is transmitted to the Windows computer via the USB cable -- The WeDidIt interactive software processes the touch signal -- Enables interactive control of the Windows interface.

[0043] The dual-mode interactive projection device of this utility model has broad application prospects, including but not limited to the following:

[0044] In the education sector: In classrooms, training centers, and other locations, teachers can flexibly switch between Android and Windows systems according to their teaching needs. They can use both the educational applications that come with the Android system and the professional software of the Windows system, which greatly improves teaching effectiveness and equipment utilization.

[0045] Business Meetings: In the meeting room, participants can operate directly on the projected screen using finger touch or an infrared pen, improving meeting efficiency and interactive experience;

[0046] Exhibition and Display: This system can be used to create interactive displays in exhibition halls, museums and other venues, enhancing audience participation and experience;

[0047] Home entertainment: In a home environment, users can use this system to play interactive games and videos on a large screen, enhancing the home entertainment experience.

[0048] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A dual-mode interactive projection device, characterized in that: The system includes a projector body, which houses an Android system motherboard and an interactive camera module. Externally, the projector body features a USB toggle switch and external interfaces, including an HDMI input interface and a USB output interface. The USB toggle switch is electrically connected to the Android system motherboard, the interactive camera module, and the USB output interface. The USB toggle switch has two operating positions: when switched to the first position, the interactive camera module is electrically connected to the Android system motherboard; when switched to the second position, the interactive camera module is electrically connected to the USB output interface. The USB output interface is connected to an external Windows computer via a USB cable.

2. The dual-mode interactive projection device according to claim 1, characterized in that: The interactive camera module is equipped with an IR-CUT function, which is used to switch between visible light mode and infrared mode.

3. The dual-mode interactive projection device according to claim 1, characterized in that: The USB toggle switch includes a toggle switch mechanical structure and a signal switching circuit.

4. The dual-mode interactive projection device according to claim 3, characterized in that: The signal switching circuit employs one of the following: a multiplexer chip, a mechanical relay, or an electronic switch circuit.

5. A dual-mode interactive projection device according to claim 1, characterized in that: It also includes an infrared pen, which is used for writing and operating on the projection screen of the projector body.

6. The dual-mode interactive projection device according to claim 1, characterized in that: It also includes a wall-mounted infrared laser emitter, which is installed above the projection wall to emit infrared lasers to form a laser screen parallel to the projection wall.

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