The mouse has evolved over decades as a computer-essential input device. Depending on the principles, there are mainly mechanical, optical, optical and optical mouse. You may be impressed by a mechanical mouse or optical mechanical mouse with a ball at the bottom. Now, pvs dominate the market with their high accuracy, mechanical structure, reliability and durability
Both the base of the mechanical mouse and the pv machine mouse are ball-to-desk contact. They rotate under the influence of friction and drive pressure. The two vertical pressure frames represent the x-axis and y-axis, respectively. Thrust to encoder. It rotates the encoder to generate the corresponding signal, and the microprocessor calculates the mouse position shift. The machine encoder is a disk with points of contact. When the encoder rotates, the point of contact is in contact with or disconnected from the contact plate, producing 0 and 1 electronic signals (as shown in figure 1); the light machine encoder plate is sewn with light sources and receivers on both sides. The encoder rotates to produce light signals (as shown in figure 2)
The optical mouse is now completely detached from the mechanical structure, with a longer life and higher accuracy. The principle of optical mouse is to take a simple picture of the mouse position
The optical mouse consists mainly of led light sources, optical lenses, sensors, etc. Its rationale is shown in figure 3. The light produced by led is luminescenced through lenses and detected by sensors after reflection on the surface. The sensor consists mainly of image acquisition units, dsp units and usb interfaces. The image acquisition unit is essentially the same as the cmos sensor, and the dsp module is responsible for calculating the shift by comparing the impact of the current image with the previous time node and determining the shift
Now, with the development of technology, new technological principles for mouse have emerged, such as eye-controlled mouse based on visual tracking technology, wireless air mouse based on mems technology, etc. Interested readers have access to the literature and to the literature。
