Wireless pen tablet
First Claim
1. Wireless transmitter apparatus for sending multiple coordinate information signals, comprisingmeans for receiving multiple coordinate data including first and second coordinate signals andgenerating means, responsive to received first and second coordinate signals, for generating a three-pulse wireless signal including a first pulse as a start pulse, a second pulse separated from said start pulse by a time proportional to the first coordinate signal, and a third pulse separated from said second pulse by a time proportional to the second coordinate signal.
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Accused Products
Abstract
A wireless communication apparatus sends X and Y coordinate position signals of a pen on a tablet using position modulation of three pulses, the time separation between the first and second pulses being proportional to the X position and the time spacing between the second and third pulses being proportional to the Y position. At a receiver, the three-pulse wireless signal is received and the X and Y coordinate information is determined therefrom.
8 Citations
13 Claims
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1. Wireless transmitter apparatus for sending multiple coordinate information signals, comprising
means for receiving multiple coordinate data including first and second coordinate signals and generating means, responsive to received first and second coordinate signals, for generating a three-pulse wireless signal including a first pulse as a start pulse, a second pulse separated from said start pulse by a time proportional to the first coordinate signal, and a third pulse separated from said second pulse by a time proportional to the second coordinate signal.
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7. Wireless receiver apparatus, comprising
means for receiving a three-pulse wireless signal including a first pulse as a start pulse, a second pulse separated from said start pulse by a time proportional to a first coordinate signal, and a third pulse separated from said second pulse by a time proportional to a second coordinate signal, and means, responsive to a received three-pulse wireless signal, for determining therefrom the first and second coordinate signals.
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11. Wireless communication system for communicating multiple coordinate information signals, comprising
at a transmitter, means for receiving multiple coordinate data including a first and second coordinate signals for defining a coordinate position and generating means, responsive to the first and second coordinate signals, for generating a three-pulse wireless signal including a first pulse as a start pulse, a second pulse separated from said start pulse by a time proportional to the first coordinate signal, and a third pulse separated from said second pulse by a time proportional to the second coordinate signal; - and
at a receiver, means for receiving the three-pulse wireless signal and means, responsive to a received three-pulse wireless signal, for determining therefrom the first and second coordinate signals.
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12. A method of operating a wirless transmitter apparatus for sending multiple coordinate information signals, comprising the steps of
receiving multiple coordinate data including first and second coordinate signals and generating, in response to a received first and second coordinate signals, a three-pulse wireless signal including a first pulse as a start pule, a second pulse separated from said start pulse by a time proportional to the first coordinate signal, and a third pulse separated from said second pulse by a time proportional to the second coordinate signal.
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13. A method of operating a wireless receiver apparatus, comprising the steps of
receiving a three-pulse wireless signal including a first pulse as a start pulse, a second pulse separated from said start pulse by a time proportional to a first coordinate signal, and third pulse separated from said second pulse by a time proportional to a second coordinate signal and determining the first and second coordinate signals from the received three-pulse wireless signal.
Specification