LCD and touch-control method thereof

Details LCD and touch-control method thereof LCD and touch-control method thereof

2008-05-27

2008-05-27

Awad, Amr A. (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C345S104000, C178S018060

Reexamination Certificate

active

07379054

ABSTRACT:
A touch-control method of an LCD is provided. During the idling time in-between the writing periods, the first touch-position sensing step detects the values of liquid crystal capacitances formed between the scan lines and the counter electrode, and detects a scan-line-direction touch position (Y) according to the values of the liquid crystal capacitances formed between the scan lines and the counter electrode. The charging step charges a voltage signal into each of the data lines needed to be detected after the scan-line-direction touch position (Y) is detected. After the voltage signal is charged, the second touch-position sensing step detects the values of liquid crystal capacitance formed between the data lines and the counter electrode, and detects a data-line-direction touch position (X) according to the values of the liquid crystal capacitance formed between the data lines and the counter electrode.

REFERENCES:
patent: 4910504 (1990-03-01), Eriksson
patent: 5270711 (1993-12-01), Knapp
patent: 5528267 (1996-06-01), Ise
patent: 5642134 (1997-06-01), Ikeda
patent: 6239788 (2001-05-01), Nohno et al.

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