Infrared Optical mice Some newer optical mice including some from Logitech's LX series use an infrared sensor instead of a light emitting diode. This saves power and can be more accurate.
Laser mice The laser mouse uses an infraredlaser diode instead of an LED to illuminate the surface beneath their sensor. As early as 1998, Sun Microsystems provided a laser mouse with their Sun SPARCstation servers and workstations.[24] However, laser mice did not enter the mainstream market until 2004, when Logitech, in partnership with Agilent Technologies, introduced its MX 1000 laser mouse.[25] This mouse uses a small infrared laser instead of an LED and has significantly increased the resolution of the image taken by the mouse. The laser enables around 20 times more surface tracking power to the surface features used for navigation compared to conventional optical mice, via interference effects.
Color of optical mouse diodes Example of a Logitech optical mouse with a blue diode The color of the optical mouse's light-emitting diodes varies with each model. Red was (and still is today) the most common, as red diodes were the cheapest when optical mice first arrived on the market. Today, a wide array of colors exist, such as blue or green. Some models' diodes even change color, cycling through colors of the rainbow for instance.
Power-saving in optical mice Manufacturers often engineer their optical mice – especially battery-powered wireless models – to save power when possible. In order to do this, the mouse dims or blinks the laser or LED when in standby-mode (Each mouse has a different standby time). This function may also increase the laser / LED life. Mice designed specifically for gamers, such as the Logitech G5 or the Razer Copperhead, often lack this feature in an attempt to reduce latency and to improve responsiveness. A typical implementation in Logitech mice has four power states, where the sensor is pulsed at different rates per second: 1500 - full on condition for accurate response while moving, illumination appears bright.100 - fallback active condition while not moving, illumination appears dull.10 - Standby2 - Sleep state Some other mice turn the sensor fully off in the sleep state, requiring a button click to wake. Some mice such as some in logitech's lx series use an infrared sensor to save power.
Wireless Keyboard is a wireless keyboard built for Macintosh computers. It interacts over Bluetooth wireless technology and unlike its wired version, it has no USB connectors or ports. Both generations have low-power features when not in use. On September 16, 2003, the first Apple Wireless Keyboard was introduced at the Apple Expo.[1] The device required four AA batteries, and had an On/Off switch on the bottom. It lacked wires and USB ports, but otherwise was cosmetically the same as the wired version. On August 7, 2007 Apple released a completely redesigned model of the Apple Wireless Keyboard. Like the wired Apple Keyboard, the new model is thinner than its predecessors and has an aluminum enclosure. Another addition is the new functions added to the function keys, such as media controls and Dashboard control. Unlike the previous version, the Wireless Keyboard now has a layout similar to the MacBook. The power button has been relocated to the right side of the keyboard, and the key layout does not include a numerical typepad.
the caps lock key now includes (undocumented) accidental press preventionthe key must be held down for a moment for Caps Lock to engage. This behavior is not configurable, and has frustrated users who remap Caps Lock to a different modifier, such as Control.[citation needed] The new keyboard also requires only three AA batteries, one fewer than its predecessor. Although Apple includes support solely for Macintosh computers, it can also be used on a Windows PC providing that a Bluetooth receiver and appropriate Bluetooth stack is installed and properly configured. Enabling use of the 'Fn' and 'Eject' keys will require customization using a generic HID driver.[3] Enabling the multimedia keys and remapping keys, such as assigning 'Del' to the 'Eject' key is also possible.
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