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Optical trackpad : ウィキペディア英語版 | Optical trackpad
An optical trackpad is an input device based on an optical sensor, which detects the displacement of a finger that is moving on top of it. The sensor is used typically in smartphones where it replaces the D-pad. The main advantages over a D-pad are: * It can track movements in 360 degrees and with varying speeds. * It uses space efficiently, without the need for small buttons that are difficult to press. Next to browsing through menus, it can drive a mouse cursor in point&click interfaces. In comparison with trackpads, it detects actual skin displacement, instead of displacement of the center of the area being touched.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Optical trackpad」の詳細全文を読む
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