Mouse DPI vs CPI

What is DPI:

The DPI English full name is "dots per inch", literally "pixels per inch", which means the pixels per inch. (1-inch =2.54cm), refers to the inside of the mouse decoding device can identify the length of pixels per inch. (The smallest unit on the screen is a pixel). This is a static unit, so this parameter is typically applied to printers and scanners.

To give a simple example: Join us using 400dpi Microsoft IE3, then the mouse on the mouse pad every inch move, the mouse pointer will be moved on the screen 400 pixels, then 800dpi is moving 800 points, the following analogy.

What is CPI:

Why do some of the mouse labeled CPI? The full English name of the CPI is "count per inch", literally "measured in inches", a standard defined by Agilent, the mouse core chip manufacturer, that can be used to indicate the number of coordinates the optical mouse can receive on a physical surface every 1 inches (2.54 centimeters) of its sensor.

For example: With Logitech's MX518, the mouse has a 1600cpi, then the user moves the mouse over the mouse pad an inch, the optical sensor will receive feedback back to the 1600 different coordinate points, Through the feedback analysis of these coordinate points, the mouse arrows move 1600 pixels on the screen. In this way, CPI becomes a dynamic unit, which in theory is more suitable as a mobile unit of the mouse.

DPI and CPI who should we trust?

See here the difference between the two is mainly that one is for the static unit one is for the dynamic unit. So the conclusion is: two is only the difference in the statement, but the performance of almost no gap .

So consumers in the future purchase of the mouse, whether it is found on the packaging of the DPI or CPI can be understood as the mouse on the mouse pad every inch of moving the pointer on the screen to move the number of pixels, completely do not have to create confusion.

Mouse DPI vs CPI