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Contrast sensitivity is typically expressed as the reciprocal of the threshold contrast for detection of a given pattern (i.e., 1 ÷ contrast threshold). [16] Using the results of a contrast sensitivity exam, a contrast sensitivity curve can be plotted, with spatial frequency on the horizontal, and contrast threshold on the vertical axis.
In contrast to a 3D Joystick, the stick itself doesn't move or just moves very little and is mounted in the device chassis. To move the pointer, the user has to apply force to the stick. Typical representatives can be found on notebook's keyboards between the "G" and "H" keys. By performing pressure on the TrackPoint, the cursor moves on the ...
Lenovo later started to include backlit keyboards, and some models included both the ThinkLight and a backlit keyboard. For those models, the Fn-Space shortcut is also used in conjunction to control a backlit keyboard (if the laptop has it). The on-screen display of ThinkPad computers will display a light on and a light off indicator.
The "luminance contrast" is the ratio between the higher luminance, L H, and the lower luminance, L L, that define the feature to be detected.This ratio, often called contrast ratio, CR, (actually being a luminance ratio), is often used for high luminances and for specification of the contrast of electronic visual display devices.
Laptops contain the keyboard, display, and processor in one case. The monitor in the folding upper cover of the case can be closed for transportation, to protect the screen and keyboard. Instead of a mouse, laptops may have a touchpad or pointing stick. Tablets are portable computers that use a touch screen as the primary input device. Tablets ...
In contrast with previous 13-inch X series model (X301), it has only one RAM slot and only one storage slot. In early August 2012, Lenovo released the ThinkPad X1 Carbon as the 14-inch successor to the original ThinkPad X1. [6] The X1 Carbon was first released in China due to the popularity of ThinkPads in that market. [7]
Some non-English language keyboards have special keys to produce accented modifications of the standard Latin-letter keys. In fact, the standard British keyboard layout includes an accent key on the top-left corner to produce àèìòù, although this is a two step procedure, with the user pressing the accent key, releasing, then pressing the letter key.
Additional features may include optional case sensitivity, a history of search terms for quick recall and autocompletion, and listing multiple results in one place. [18] [better source needed] Cut, copy, and paste – most text editors provide methods to duplicate and move text within the file, or between files. Ability to handle UTF-8 encoded ...