Sensing the size of a touch point in a touch-sensitive panel employing resistive membranes
First Claim
1. An improved interactive whiteboard system, the interactive whiteboard including a writing surface and an input device, a user capable of choosing between at least two operational modes of the whiteboard system, the improvement comprising:
- an automated mode detection system that upon detecting a mode-providing characteristic of the input device, automatically selects an appropriate operational mode of the whiteboard system.
3 Assignments
0 Petitions
Accused Products
Abstract
A touch screen such as an electronic whiteboard that detects the size of a touch as well as the touch'"'"'s location on the touch screen. The size of the touch or a stylus mode based on the size of the touch is then reported to an application program by the touch screen and the application program uses the size or mode to determine what operation is to be performed at the location of the touch. In the exemplary implementation, the size of the touch determines whether the stylus mode is erasing or non-erasing. A user of the touch screen can thus switch from writing to erasing simply by switching from a marking pen to an eraser that is broader than the marking pen. In the exemplary implementation, the touch panel is a resistive membrane touch panel and touch size is detected from a touch resistance that is determined by subtracting other components of the total resistance of a circuit that arises when the touch panel is touched.
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Citations
20 Claims
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1. An improved interactive whiteboard system, the interactive whiteboard including a writing surface and an input device, a user capable of choosing between at least two operational modes of the whiteboard system, the improvement comprising:
an automated mode detection system that upon detecting a mode-providing characteristic of the input device, automatically selects an appropriate operational mode of the whiteboard system. - View Dependent Claims (2, 3, 4, 5, 6)
- 7. In an electronic whiteboard system including (i) a resistive touch screen of the type wherein a touch is detected by a change in resistance when a first conductive surface of the touch screen comes into contact with a second conductive surface thereof at a touch point, (ii) modes of operation, and (iii) a step of notifying the electronic whiteboard system what mode of operation to use, an improvement to the electronic whiteboard system comprising an automated mode detection system that upon detecting a mode-providing characteristic of a touch upon the whiteboard, automatically selects an appropriate operational mode, without resort to step (iii) of notifying the electronic whiteboard system to change the mode of operation.
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12. An electronic whiteboard system having modes of operation, the system comprising:
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a resistive touch screen of the type wherein a touch is detected by a change in resistance when a first conductive surface of the touch screen comes into contact with a second conductive surface thereof at a touch point;
an automated mode detection system that detects the touch, and automatically selects an operational mode from an analysis of at least one mode-providing characteristic of the touch point. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A resistive membrane whiteboard system, comprising:
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a first conductive deformable surface;
a second conductive surface; and
a controller in communication with the first and second conductive surfaces that automatically selects a mode of operation of the system based on a contact resistance value generated when the first conductive surface contacts the second conductive surface in response to a touch. - View Dependent Claims (19, 20)
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Specification