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US 2001/0033274 A1Published application
Method and apparatus for erasing previously entered data
OwnerJoon-Suan Onginventor
Life of this patent
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Abstract
A method and apparatus for erasing previously entered data shown at an area on an input device are disclosed. A pen-erase action generates a pressure on the input device and in consequence an electric contact between resistive layers of the input device. By comparing a series resistance including the contact resistance of such electric contact with a predetermined threshold value, the pen-erase action can be detected and the data will then be erased.
Claims12
A method for erasing previously entered data shown at an area on an input device, comprising:
- generating a pressure on said area where the data is shown;
- forming an electrical contact with a contact resistance between a pair of resistive layers of the input device in response to the pressure to further form a resistor network, wherein each divided internal resistive layer provides a pair of series resistors to form the resistor network;
- collecting a first set of information relating to the resistance of at least one of the series resistors of each resistive layer to determine a location of the electrical contact;
- determining an information relating to the contact resistance of the electrical contact;
- obtaining a predetermined threshold information from a set of predetermined location-specific threshold information relating to the contact resistance of the electrical contact by using the first set of information;
- comparing the information relating to the contact resistance with the predetermined threshold information for distinguishing the pressure;
- and
- erasing said previously entered data if the information relating to the contact resistance is lower than the predetermined threshold information.
5 more elements
A computational device comprising:
- a display for displaying entered data at an area;
- a panel covering the display for data entry and erasure, the panel having a pair of resistive layers;
- and
- a tool, operatively connected to the display, for erasing entered data shown on the display by applying a pressure at the area on the panel to generate an area contact,
- wherein the resistive layers form a resistor network in response to the pressure so as to identify the area contact and subsequently erase the entered data shown at the area.
2 more elements
Dependencies are inferred from the claim text.