Browse Prior Art Database

Driving Method Reducing Crosstalk for Liquid Crystal Display

IP.com Disclosure Number: IPCOM000117782D
Original Publication Date: 1996-Jun-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Shimizu, H: AUTHOR

Abstract

Disclosed is a driving method of Thin Film Transistor/Liquid Crystal Display (TFT/LCD) which reduces crosstalk generated by coupling between a data-line and pixels. This method is applied both for LCD panels of storage-capacitor on gate structure "Cs on Gate" and separate storage-capacitor structure.

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Driving Method Reducing Crosstalk for Liquid Crystal Display

Disclosed is a driving method of Thin Film Transistor/Liquid Crystal Display (TFT/LCD) which reduces crosstalk generated by coupling between a data-line and pixels. This method is applied both for LCD panels of storage-capacitor on gate structure "Cs on Gate" and separate storage-capacitor structure.

This driving method is as follows:

1. Driving pulse is composed of two parts.

2. The first part is the voltage to cancel out capacitive coupling

between data-line on pixel electrode.

3. The second part is final charging voltage of pixel for display.

4. The periods of first and second portion can be different for each

gray level. But, the total period of first and second portions

is to be constant.

Fig. 1 shows an equivalent circuit of TFT/LCD's one pixel.

Figs. 2 and Fig. 3 show the driving wave form of this driving method which applies to the TFT/LCD.

This driving method is not limited to apply only for the horizontal line inversion drive (alternation common drive). This driving method is also effective in various types of TFT/LCD driving such as "vertical line inversion drive", "pixel inversion drive" etc..

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