APPARATUS FOR DRIVING A TOUCH PAD AND A PORTABLE TERMINAL HAVING THE SAME
First Claim
1. An apparatus for driving a touchpad of a portable terminal, the apparatus comprising:
- a sensor unit for generating an interrupt signal when pressure on a touchpad is sensed;
a second control unit for controlling the touchpad in an active mode;
a first control unit for outputting an activating signal to activate the second control unit when the interrupt signal is generated; and
a switching unit for transmitting the interrupt signal generated from the sensor unit to the first control unit when the second control unit is in an inactive mode.
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Accused Products
Abstract
An apparatus for driving a touchpad of a portable terminal including a second control unit controlling the touchpad in an active mode is provided. The apparatus includes a sensor unit for generating interrupt signals when pressure on the touchpad is sensed, a first control unit for outputting activating signals to activate the second control unit when the interrupt signals are input and a switching unit for transmitting the interrupt signals generated from the sensor unit to the first control unit when the second control unit is in an inactive mode. Accordingly, even though the multimedia processor embedded in the portable terminal is in an inactive mode, the multimedia processor is activated when a user presses the touchpad, thereby making it possible to process signals input by touching the touchpad, particularly, to keep the user interface. Furthermore, the multimedia processor embedded in the portable terminal can reduce the consumption of battery power required to maintain the user interface, as compared with multimedia processors maintaining operating in a conventional polling method.
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Citations
20 Claims
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1. An apparatus for driving a touchpad of a portable terminal, the apparatus comprising:
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a sensor unit for generating an interrupt signal when pressure on a touchpad is sensed; a second control unit for controlling the touchpad in an active mode; a first control unit for outputting an activating signal to activate the second control unit when the interrupt signal is generated; and a switching unit for transmitting the interrupt signal generated from the sensor unit to the first control unit when the second control unit is in an inactive mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for driving a touchpad of a portable terminal, the apparatus comprising:
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a sensor unit for generating an interrupt signal when pressure on a touchpad is sensed; a second control unit for controlling the touchpad in an active mode; and a first control unit for outputting an activating signal to activate the second control unit when the interrupt signal is input. - View Dependent Claims (15, 16, 17, 18)
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19. An apparatus for driving a touchpad of a portable terminal, the apparatus comprising:
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a touchpad, the touchpad comprising; a sensor unit for generating an interrupt signal when pressure on the touchpad is sensed; and a switching unit for transmitting the interrupt signal generated from the sensor unit; a second control unit for controlling the touchpad in an active mode; and a first control unit for outputting an activating signal to activate the second control unit when the interrupt signal is transmitted from the switching unit. - View Dependent Claims (20)
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Specification