Method for compensating electromagnetic inductive pressure level
First Claim
1. A method for establishing a pressure level compensation value table for an electromagnetic pen, comprising:
- providing an electromagnetic pen with a standard or predetermined frequency and a standard or predetermined signal amplitude on a touch panel, wherein the touch panel has a sensor layer and at least one sensor coil on a transparent substrate, the sensor coil is located on the peripheral region of the transparent substrate and around the sensor layer;
measuring signal amplitudes of the electromagnetic pen on predetermined locations on the touch panel;
calculating distances between the electromagnetic pen and the sensor coil by calculating the differences between the measured signal amplitudes and the predetermined signal amplitude;
measuring frequencies of the electromagnetic pen on the predetermined locations on the touch panel; and
establishing a pressure level compensation table via obtaining frequency error values of the predetermined locations by calculating the differences between the measured frequencies of the electromagnetic pen on the predetermined locations and the standard frequency.
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Accused Products
Abstract
A method for compensating electromagnetic inductive pressure level of an electromagnetic pen is disclosed. First of all, an electromagnetic pen is provided on a touch panel, wherein the touch panel has a sensor layer and at least one sensor coil on a transparent substrate, the sensor coil is located on the peripheral region of the transparent substrate and around the sensor layer. Then a signal amplitude of the electromagnetic pen is calculated and a pressure level value is calculated via a frequency of the electromagnetic pen. Next distances between the sensor coil and the electromagnetic pen are calculated to obtain the location of the electromagnetic pen. Then a pressure level compensation value is obtained from a pressure level compensation value table. Finally, a compensated pressure level value is obtained by adding the pressure level value and the pressure level compensation value.
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Citations
4 Claims
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1. A method for establishing a pressure level compensation value table for an electromagnetic pen, comprising:
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providing an electromagnetic pen with a standard or predetermined frequency and a standard or predetermined signal amplitude on a touch panel, wherein the touch panel has a sensor layer and at least one sensor coil on a transparent substrate, the sensor coil is located on the peripheral region of the transparent substrate and around the sensor layer; measuring signal amplitudes of the electromagnetic pen on predetermined locations on the touch panel; calculating distances between the electromagnetic pen and the sensor coil by calculating the differences between the measured signal amplitudes and the predetermined signal amplitude; measuring frequencies of the electromagnetic pen on the predetermined locations on the touch panel; and establishing a pressure level compensation table via obtaining frequency error values of the predetermined locations by calculating the differences between the measured frequencies of the electromagnetic pen on the predetermined locations and the standard frequency. - View Dependent Claims (2, 3, 4)
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Specification