Data processing system comprising a graphic tablet and a stylus and stylus for use in such a system
First Claim
1. A data processing system, comprising a graphic tablet, a stylus capable of transmitting a stylus signal which serves for the detection of a position of the stylus relative to the tablet, and activation means for activating the stylus under the influence of a wireless activation signal, characterized in that:
- the system further comprises a display screen adjacent the tablet, which display screen transmits the wireless activation signal as a consequence of an operational behavior of the display screen, and that the stylus comprises the activation means and is arranged to receive the activation signal transmitted by the display screen.
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Accused Products
Abstract
In a data processing system comprising a graphic tablet and a wireless stylus cooperating with the tablet, the stylus is activated by an activation signal transmitted by a display screen integrated with the tablet. For the activation signal use is made of a signal which is transmitted any way by the display screen in the normal operational mode. The stylus is arranged to receive the signal and to change over from a battery-saving standby mode to an operational mode upon reception of this signal.
35 Citations
20 Claims
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1. A data processing system, comprising a graphic tablet, a stylus capable of transmitting a stylus signal which serves for the detection of a position of the stylus relative to the tablet, and activation means for activating the stylus under the influence of a wireless activation signal, characterized in that:
- the system further comprises a display screen adjacent the tablet, which display screen transmits the wireless activation signal as a consequence of an operational behavior of the display screen, and that the stylus comprises the activation means and is arranged to receive the activation signal transmitted by the display screen.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A data processing system, comprising:
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a display screen, said display screen emitting electromagnetic radiation during operation; a positioning tablet adjacent the screen, a stylus including transmitting means for transmitting a stylus signal, the positioning tablet receiving the stylus signal to determine the position of the stylus relative to the tablet, said stylus including activating means for activating the transmitting means, said activating means detecting the electromagnetic radiation from the display screen and activating the transmitting means in dependence on the electromagnetic radiation from the display screen. - View Dependent Claims (12, 13, 14, 15)
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16. A data processing system, comprising:
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a display screen, said display screen emitting electromagnetic radiation with a characteristic frequency signature at least recurrently during operation; a positioning tablet adjacent the screen, a stylus including transmitting means for transmitting a stylus signal, the positioning tablet receiving the stylus signal to determine the position of the stylus relative to the tablet, said stylus including activating means for activating the transmitting means, and a battery for powering said transmitting means and said activating means, said transmitting means when activated having a higher power drain on said battery than when inactivated, said activating means detecting the electromagnetic radiation from the display screen and activating the transmitting means in dependence on detection of electromagnetic radiation from the display screen with (i) the characteristic frequency signature and (ii) a preselected signal strength corresponding to a selected distance of the stylus from the display screen, so that the transmitter is inactive and power drain on the battery is reduced when (i) the stylus is further from the screen than the selected distance from the display screen and (ii) the display screen is inoperative. - View Dependent Claims (17, 18, 19, 20)
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Specification