Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2005-04-26
2005-04-26
Wu, Xiao (Department: 2674)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C345S174000, C345S175000, C345S176000, C345S177000, C345S210000, C345S208000, C178S018020, C178S018060, C178S019030, C361S179000, C361S181000, C307S116000, C307S139000, C382S124000, C340S562000
Reexamination Certificate
active
06885365
ABSTRACT:
A glass touch sensing circuit which is capable of accurately detecting a sense signal resulting from a user's touch under no influence of variations in temperature. The glass touch sensing circuit is adapted to compare the level of an output signal from a switching device, which indicates whether the user touches a touch sensor, with that of a reference signal and convert the output signal from the switching device into a wave-shaped signal in accordance with the compared result. The present glass touch sensing circuit is further adapted to determine the level of the reference signal for compensation for a variation in the output signal from the switching device with temperature. Therefore, the glass touch sensing circuit can be employed in a human body touch-based key input sensing system to provide a constant performance irrespective of a variation in temperature so as to sense a key input based on a touching operation.
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Abdulselam Abbas
Fleshner & Kim LLP
LG Electronics Inc.
Wu Xiao
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