The working principle of interactive whiteboards mainly includes the following:
Principle of infrared touch screen: Interactive whiteboards are usually equipped with infrared touch screens, which work by placing infrared receiving and emitting tubes around the touch screen to form an infrared sensing network. When an object (such as a finger or a specific pen) comes into contact with the screen, it blocks some infrared radiation, causing the receiving tube to detect signal changes and determine the touch position
Pressure sensing principle: Some interactive whiteboards use pressure sensing technology and have two layers of conductive film inside. When an object contacts the surface of the whiteboard, two layers of conductive film are connected to form a current change. The voltage change is detected by a detection circuit to determine the position of the touch point. This technology transfers data to a computer through a USB or RS232 interface
Laser tracking principle: Some high-end interactive whiteboards use laser tracking technology, which emits laser to the surface of the whiteboard through a laser sensor. The special pen has the function of sensing the laser and providing feedback on the pen's position information, thereby achieving precise positioning and operation
Application scenarios and technical characteristics of interactive whiteboards
Interactive whiteboards are widely used in fields such as education, conferences, and training. In the field of education, interactive whiteboards can support multimedia teaching, real-time annotation, discussion and other functions, enhancing teaching interactivity and efficiency. In meetings, it can be used for real-time annotation, discussion, and collaboration, improving the efficiency and participation of meetings. In addition, interactive whiteboards also have the following technical features:
Real time interaction: Real time synchronization of content is achieved through backend databases and long connection technology, ensuring that all participants see the latest content
Multimedia integration: supports the integration of various media resources such as video, audio, and images, providing rich and diverse display methods
Conflict resolution: Adopting a server arbiter mechanism to ensure real-time and consistent content during multi person operations
Intelligent technology: Combining big data and cloud computing technology to provide personalized teaching and resource recommendations, enhancing user experience
