Liquid crystal display panel having circuitry for reducing the m

Details Liquid crystal display panel having circuitry for reducing the m Liquid crystal display panel having circuitry for reducing the m

1996-10-31

1998-11-17

Nguyen, Chanh

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 98, G09G 320

Patent

active

058382879

ABSTRACT:
A liquid crystal display device (LCD) includes sets of row address conductors (10) and column address conductors (11) which are coupled to liquid crystal pixels (12) arranged in a matrix of rows and columns for displaying images. A drive circuit (20-24) for such a display device generates selection voltages (Vr) to be supplied to one of the sets of address conductors (10, 11), and data voltages (Vk) to be supplied to the other set of address conductors (10, 11), the data voltages (Vk) being related to a received display information signal (VI). To reduce a mutual influence of the pixels connected to the selection address conductor, which influence is caused by charge currents flowing via a common impedance arranged in series with the selection address conductor, the drive circuit (20-24) further includes an averaging circuit (23) for generating a correction signal (C) and for averaging an information signal (Im) related to the display information signal (VI) over an averaging period which is related to a line period of the information signal (Im). The drive circuit (20-24) is further provided with a voltage correction circuit (22) for generating at least a power supply voltage (CV) corrected in dependence upon a correction signal (C) to be supplied to at least one of the sets of address conductors (10, 11).

REFERENCES:
patent: 5014048 (1991-05-01), Knapp
patent: 5434588 (1995-07-01), Parker
patent: 5457474 (1995-10-01), Ikeda
patent: 5489910 (1996-02-01), Kuwata et al.

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