It is an evolution of the membrane keyboard, using the same principle of a single rubber sheet with. The G series and SL series omit the ThinkLight.Ī few ThinkPads (17' W700 and W701) have featured the ThinkLight with dual white LEDs. A chiclet keyboard or island-style keyboard is a computer keyboard with keys that form an array of small, flat rectangular or lozenge-shaped rubber or plastic keys that look like erasers or 'Chiclets,' a brand of chewing gum manufactured in the shape of small squares with rounded corners. Some ThinkPads, like the Z and R series (though not all - some R61 and R32 models still have the white light) feature an amber LED due to the lower cost, while other models, like the T series, use a white LED (which is generally preferred). The ThinkLight can be activated when the monitor is on or off but not while the computer is off.
The on-screen display of ThinkPad computers will display a light on and a light off indicator. For those models, the Fn-Space shortcut is also used in conjunction to control a backlit keyboard (if the laptop has it). Lenovo later started to include backlit keyboards, and some models included both the ThinkLight and a backlit keyboard. Later ThinkPads use the combination Fn-Space instead. It is activated with the key combination Fn-PgUp (the bottom left and top right keys of the keyboard). A white or amber LED (depending on model) is located on the top edge of the display, illuminating the keyboard to allow use in low-light conditions.
