Image display device and video signal processing method used in same

摘要

The degree of an influence from wiring crosstalk between signal lines of a data signal transmission line (video signal line) is decided on the basis of an input signal generated in display controlling unit (a timing controller) at a predetermined timing (at each frame period, at each clock pulse period, or at each horizontal period) and, based on a result of the decision, the voltage amplitude of a data signal is adjusted so that it may exceed an input amplitude specification value for data line driving circuits (data drivers) by a predetermined value.

主权项

1. An image display device comprising:
a display panel including a plurality of columns of data lines and a plurality of rows of scanning lines; a data signal transmission line to transmit a data signal as a binary signal having a “H” or “L” level therethrough by a differential transmission system, the data signal transmission line which is defined as being a video signal line and connects a data signal output section to a data driver; a display controlling unit to generate said data signal based on an input video signal and output the generated data signal via said data signal transmission line; and said data driver to write pixel data to each of said data lines in said display panel based on said data signal supplied from said display controlling unit via said data signal transmission line, wherein in said data driver, an input amplitude specification value is set to define a minimum reference voltage amplitude of said data signal for said data driver to operate properly; wherein said data signal transmission line has a plurality of signal lines to transmit at least an arbitrary gradation level of said video signal, said plurality of signal lines divided into every two neighboring signal lines which transmit as a signal line pair mutually reverse-phase data signals for complying with said differential transmission system; and wherein said display controlling unit includes: an input signal deciding section that decides a degree of an influence exerted upon said data signal by wiring crosstalk between two neighboring signal line pairs based on the generated data signal at each of predetermined timings; a transmission voltage amplitude controlling section that controls a voltage amplitude of data signal so as to exceed said input amplitude specification value by a predetermined value, based on a result of the decision by said input signal deciding section; and said data signal output section that sends said data signal having the voltage amplitude controlled by said transmission voltage amplitude controlling section, to said data driver via said data signal transmission line.