Capacitive touchpad and toy incorporating the same
First Claim
1. A computer peripheral toy comprising:
- a capacitive touchpad assembly comprising;
a capacitive touch surface;
a pulse generator configured to provide pulses defining recurring intervals;
a logic-controlled switch for altering a voltage of the capacitive touch surface during each interval until the voltage of the capacitive touch surface reaches a threshold voltage;
a timer configured to measure the time required for the voltage of the capacitive touch surface to reach the threshold voltage in each interval;
an accumulator configured to accumulate the times measured by the timer during a predetermined number of intervals; and
control circuitry configured to produce a signal indicative of the capacitive touch surface being touched where the accumulated time is greater than a predetermined value;
a housing having a surface adapted to receive a playing card;
a reader configured to read from a playing card placed on the surface identification information about the playing card;
an interface between the toy and a computing device; and
a controller configured to;
receive from the reader the identification information about the playing card placed on the surface; and
communicate instructions through the interface to the computing device to cause the computing device to provide an output related to the received identification information;
wherein the capacitive touch surface is formed on the surface adapted to receive a playing card, and the capacitive touch surface is configured to detect touching through the playing card.
1 Assignment
0 Petitions
Accused Products
Abstract
Capacitive touchpad assemblies, toys including capacitive touchpad assemblies and integral card readers, and methods for detecting contact with a capacitive touch surface are provided. A capacitive touch surface may have a capacity that varies depending on whether it is being contacted by an object such as a human finger. A voltage of the capacitive touch surface may be altered during each of a predetermined number of recurring time intervals. The capacitance of the capacitive touch surface will determine the amount of time required to alter its voltage to a threshold voltage within each time interval. The sum amount of time required for the voltage of the capacitive touch surface to reach the threshold voltage in a predetermined number of time intervals may be used to determine whether the capacitive touch surface is being touched.
183 Citations
19 Claims
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1. A computer peripheral toy comprising:
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a capacitive touchpad assembly comprising; a capacitive touch surface; a pulse generator configured to provide pulses defining recurring intervals; a logic-controlled switch for altering a voltage of the capacitive touch surface during each interval until the voltage of the capacitive touch surface reaches a threshold voltage; a timer configured to measure the time required for the voltage of the capacitive touch surface to reach the threshold voltage in each interval; an accumulator configured to accumulate the times measured by the timer during a predetermined number of intervals; and control circuitry configured to produce a signal indicative of the capacitive touch surface being touched where the accumulated time is greater than a predetermined value; a housing having a surface adapted to receive a playing card; a reader configured to read from a playing card placed on the surface identification information about the playing card; an interface between the toy and a computing device; and a controller configured to; receive from the reader the identification information about the playing card placed on the surface; and communicate instructions through the interface to the computing device to cause the computing device to provide an output related to the received identification information; wherein the capacitive touch surface is formed on the surface adapted to receive a playing card, and the capacitive touch surface is configured to detect touching through the playing card. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of detecting contact with a capacitive touch surface comprising:
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providing a computer peripheral toy, including a housing with having a surface adapted to receive a playing card, a reader configured to read from a playing card placed on the surface identification information about the playing card, an interface between the toy and a computing device, and a controller configured to receive from the reader the identification information about the playing card placed on the surface and communicate instructions through the interface to the computing device to cause the computing device to provide an output related to the received identification information, wherein the capacitive touch surface is formed on the surface adapted to receive a playing card, and the capacitive touch surface is configured to detect touching through the playing card; providing pulses to define recurring intervals; altering a voltage of the capacitive touch surface during each interval until the voltage of the capacitive touch surface reaches a threshold voltage; measuring the time required for the voltage of the capacitive touch surface to reach the threshold voltage in each interval; accumulating the times measured during a predetermined number of intervals; and indicating that the capacitive touch surface is being touched where the accumulated time is greater than a predetermined value. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A capacitive touchpad assembly comprising:
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a capacitive touchpad; a housing having a surface adapted to receive a playing card; a reader configured to read from a playing card placed on the surface identification information about the playing card; an interface between the toy and a computing device; a controller configured to; receive from the reader the identification information about the playing card placed on the surface; and communicate instructions through the interface to the computing device to cause the computing device to provide an output related to the received identification information; wherein the capacitive touch surface is formed on the surface adapted to receive a playing card, and the capacitive touch surface is configured to detect touching through the playing card; a clock configured to provide recurring time intervals; control circuitry configured to perform the following steps for a predetermined number of time intervals; alter a voltage of the capacitive touchpad until the voltage of the capacitive touchpad reaches a threshold voltage; measure the time required for the voltage of the capacitive touchpad to reach the threshold voltage; accumulate the measured time; wherein upon completion of the predetermined number of time intervals, the control circuitry is further configured to indicate contact with the capacitive touchpad where the accumulated time is greater than a threshold value. - View Dependent Claims (16, 17, 18, 19)
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Specification