Pointing device with a rollable device and light source
A pointing device is electrically connect to a computer. The pointing device is used to control movements of a cursor on a display device of the computer. The pointing device has a housing, a pointing unit installed inside the housing to generate pointing signals to control the movements of the cursor, a rollable device for generating rolling signals, a light source for illuminating the rollable device, and a control unit for controlling the pointing device. When the computer transmits a state signal to the pointing device, the control unit controls the light source to determine an illumination mode of the rollable device according to the state signal.
Primax Electronics Ltd.
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inventional additional inventional inventional
Chen-Ming Jong-Ding Cheng-Pin Kai-Kuang
Chang Wang Chou Liang