How the Bluetooth laser keyboard works:
Laser Bluetooth is a new type of data entry device (also called laser keyboard, virtual keyboard, etc.) that uses 3D electronic recognition technology to project keyboard images on a flat surface with a laser beam, providing the same operating environment as a general keyboard. The main combination is an organic combination product that affects the projection template, the sensor template, and the infrared light source template. The projection is on an opaque flat surface. When the user taps the virtual keyboard with a finger, the infrared book is interrupted, and the sensor is imaged on three levels. The operation then outputs a coordinate assigned by the system.