Power
Manufacturers often engineer their optical mice—especially battery-powered wireless models—to save power when possible. To do this, the mouse dims or blinks the laser or LED when in standby mode (each mouse has a different standby time). A typical implementation (by Logitech) has four power states, where the sensor is pulsed at different rates per second:
- 11500: full on, for accurate response while moving, illumination appears bright.
- 1100: fallback active condition while not moving, illumination appears dull.
- 110: standby
- 12: sleep state
Movement can be detected in any of these states; some mice turn the sensor fully off in the sleep state, requiring a button click to wake.
Optical mice utilizing infrared elements (LEDs or lasers) offer substantial increases in battery life. Some mice, such as the Logitech V450 848 nm laser mouse, are capable of functioning on two AA batteries for a full year, due to the low power requirements of the infrared laser.
Mice designed for use where low latency and high responsiveness are important, such as in playing video games, may omit power-saving features to improve performance.
Read more about this topic: Optical Mouse
Famous quotes containing the word power:
“Guilty. Guilty. My evil self is at that door, and I have no power to stop it.”
—Cyril Hume, and Fred McLeod Wilcox. Dr. Morbius (Walter Pidgeon)
“The terror of the atom age is not the violence of the new power but the speed of man’s adjustment to it—the speed of his acceptance.”
—E.B. (Elwyn Brooks)
“In the theory of gender I began from zero. There is no masculine power or privilege I did not covet. But slowly, step by step, decade by decade, I was forced to acknowledge that even a woman of abnormal will cannot escape her hormonal identity.”
—Camille Paglia (b. 1947)