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The engine is the core of a mouse, the excellent engine directly determines the positioning of a mouse, that is, its price. After years of fighting with each other, the mainstream mouse engine family only has photoelectricity and laser two kinds left at present, their principles are different, each has its own characteristics, is often when the friends purchase the mouse when the key. Today, we will analyze the principles, advantages and disadvantages of these two engines for you, and give you some Suggestions on mouse parameters, hoping to be useful to you.
First, let's look at the photoelectric engine.
Photoelectric mouse is our most common mouse, none of them. It mainly consists of four parts: LED, lens, optical engine and control chip. When after connecting a mouse, the mouse within the LED light always shine the light after several rounds of refraction, eventually shooting Angle of 30 ° on the desktop, illuminate the shadows produced by rough surface, and then make the light coming through the lens of a set of optical feedback to the sensor. When the mouse moves, the sensor will record the continuous shadow pattern, through the DSP (digital signal processor), and to judge the direction of the displacement of the mouse and size, output value, and then through the SPI (serial peripheral interface) to mouse MCU (micro control unit), the mouse processor to deal with these values, to the host. This is how the photoelectric mouse works.
Next, let's talk about the laser mouse.
For now, the laser mouse's positioning is largely high-end, largely due to its high cost.
Laser mouse actually took advantage of the laser can directly reflect the characteristics of the surface details, also is the laser light interference fringes produced by a surface to form a point of light reflection to the sensors, without the use of shadows to identify, its present each image is more sophisticated, and at the time of the contrast image sensors, can more accurate judgement of the mouse. In addition, the laser used by the laser mouse is a low-power laser light source, relatively low power consumption.