Method of suppressing electromagnetic interference radiation from a display device
First Claim
1. A method for suppressing radiation of electromagnetic interference from a display device including an LCD and a capacitive touch panel in which the capacitive touch panel is supported by a chassis and the capacitive touch panel includes an electrically conductive surface, the method comprising:
- determining the lowest frequency for which it is desired to provide a greater amount of suppression of electromagnetic interference from the display device;
determining a capacitive impedance corresponding to said lowest frequency;
providing a capacitor having a capacitance corresponding to the capacitive impedance determined by said determining a capacitive impedance; and
using the capacitor to capacitively connect the electrically conductive surface of the capacitive touch panel to the chassis.
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Accused Products
Abstract
A display device for displaying information to a user in correspondence with a display signal. The display device includes an LCD receiving the display signal and displaying information in accordance with the display signal. The display device additionally includes a capacitive touch panel having an electrically conductive surface. The capacitive touch panel provides a signal corresponding to the location of an object touching or placed in close proximity to the surface of the capacitive touch panel for providing user input. A chassis supports the LCD and capacitive touch panel in the device. A capacitor capacitively connects the electrically conductive surface of the capacitive touch panel to the chassis.
10 Citations
12 Claims
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1. A method for suppressing radiation of electromagnetic interference from a display device including an LCD and a capacitive touch panel in which the capacitive touch panel is supported by a chassis and the capacitive touch panel includes an electrically conductive surface, the method comprising:
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determining the lowest frequency for which it is desired to provide a greater amount of suppression of electromagnetic interference from the display device; determining a capacitive impedance corresponding to said lowest frequency; providing a capacitor having a capacitance corresponding to the capacitive impedance determined by said determining a capacitive impedance; and using the capacitor to capacitively connect the electrically conductive surface of the capacitive touch panel to the chassis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for suppressing radiation of electromagnetic interference from a display device including an LCD and a capacitive touch panel in which the capacitive touch panel is supported by a chassis and the capacitive touch panel includes an electrically conductive surface, the method comprising:
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determining a frequency for which it is desired to provide a greater amount of suppression of electromagnetic interference from the display device; determining a capacitive impedance corresponding to the frequency; providing a capacitor having a capacitance corresponding to the capacitive impedance determined by said determining a capacitive impedance; and using the capacitor to capacitively connect the electrically conductive surface of the capacitive touch panel to the chassis. - View Dependent Claims (12)
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Specification