POWER SAVING TOUCH ELECTRONIC BOOK
First Claim
1. A power saving touch electronic book, operated by a stylus, comprising:
- a proximity sensing unit, used to output an enable signal according to the distance said stylus is away from said proximity sensing unit, wherein said enable signal is at a first level when said distance is not larger than a predetermined threshold, and at a second level when said distance is larger than said predetermined threshold;
a control unit, having an enable input end and a touch sensing interface, said enable input end coupled with said enable signal, said touch sensing interface being used to output a power for touch sensing and receive a touch sensing signal when said enable signal changes state from said second level to said first level; and
a touch screen, coupled with said touch sensing interface to access said power for touch sensing and provide said touch sensing signal in response to a touch operation using said stylus.
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Accused Products
Abstract
A power saving touch electronic book, operated by a stylus, including: a proximity sensing unit, used to output an enable signal by detecting the distance the stylus is away from it, wherein the enable signal is at a first level when the distance is not larger than a predetermined threshold, and at a second level when the distance is larger than the predetermined threshold; a control unit, having an enable input end and a touch sensing interface, the enable input being coupled with the enable signal, and the touch sensing interface having a power supply output terminal which will output a power for touch sensing when the enable signal changes state from the second level to the first level; and a touch screen, coupled with the touch sensing interface to access the power for touch sensing and thereby provide a touch sensing function.
15 Citations
6 Claims
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1. A power saving touch electronic book, operated by a stylus, comprising:
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a proximity sensing unit, used to output an enable signal according to the distance said stylus is away from said proximity sensing unit, wherein said enable signal is at a first level when said distance is not larger than a predetermined threshold, and at a second level when said distance is larger than said predetermined threshold; a control unit, having an enable input end and a touch sensing interface, said enable input end coupled with said enable signal, said touch sensing interface being used to output a power for touch sensing and receive a touch sensing signal when said enable signal changes state from said second level to said first level; and a touch screen, coupled with said touch sensing interface to access said power for touch sensing and provide said touch sensing signal in response to a touch operation using said stylus. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification