Image display device and transmission signal control method to be used in same

An image display device comprising:

• a display panel including a plurality of display regions each having predetermined columns of data lines, predetermined rows of scanning lines, and a plurality of pixel each disposed at an intersection between each of said data lines and each of said scanning lines;
• two data line driving circuits arranged on specified data line terminal side margins of said display panel to write pixel data, based on a transmitted data signal, to each of said data lines in a corresponding display region;
• a scanning line driving circuit to output a scanning driving signal for driving each of said scanning lines in a predetermined order based on a given scanning control signal;
• and
• a signal processing unit, based on a given video signal, to generate a data signal and to transmit the generated data signal to a corresponding one of sad two data line driving circuits through a corresponding data signal transmission wiring and to generate said scanning control signal and to transmit the generated scanning control signal to said scanning driving circuit,
• wherein said signal processing unit performs setting of a direction of a current of said data signal so that a direction of a data signal current flowing through one of said two data line driving circuits and a direction of said data signal current flowing through another of said two data line driving circuits are reversed to each other.

An image display device comprising:

• a display panel including a plurality of display regions each having predetermined columns of data lines, predetermined rows of scanning lines, and a plurality of pixel each disposed at an intersection between each of said data lines and each of said scanning lines;
• two data line driving circuits each to write pixel data produced based on a transmitted data signal to each of said data lines in a corresponding display region, one of said two data line driving circuits disposed on a data line terminal side margin on an upper portion of said display panel, and another of said two data line driving circuit disposed on a data line terminal side margin on a lower portion of said display panel;
• a scanning line driving circuit to output a scanning driving signal to drive each scanning line in a predetermined order according to a given scanning control signal;
• and
• a signal processing unit, based on a given video signal, to generate a data signal and to transmit the generated data signal to a corresponding one of data line driving circuits through a corresponding data signal transmission wiring and to generate said scanning control signal and to transmit the generated scanning control signal to said scanning driving circuit,
• wherein said signal processing unit sends out a data signal to each of data signal transmission wirings in a same phase and each of said data signal transmission wirings is arranged so that a direction of said data signal of a current flowing through the one of said two data line driving circuits and a direction of said data signal of a current flowing through the other of said two data line driving circuits become reversed to each other.

An image display device comprising:

• a display panel including a plurality of display regions each having predetermined columns of data lines, predetermined rows of scanning lines, and a plurality of pixel each disposed at an intersection between each of said data lines and each of said scanning lines;
• four data line driving circuits each to write pixel data produced based on a transmitted data signal to each of said data lines in a corresponding display region, said four data line driving circuits comprising a first data line driving circuit arranged on a data line terminal side margin of a left upper portion of said display panel, a second data line driving circuit arranged on a data line terminal side margin of a left lower portion of said display panel, a third data line driving circuit arranged on a data line terminal side margin of right upper portion of said display panel, and a fourth data line driving circuit arranged on a data line terminal side margin of a right lower portion of said display panel;
• a scanning line driving circuit to output a scanning driving signal to drive each scanning line in a predetermined order according to a given scanning control signal;
• and
• a signal processing unit, based on a given video signal, to generate a data signals and to transmit the generated data signal to a corresponding one of data line driving circuits through a corresponding data signal transmission wiring and to generate said scanning control signal and to transmit the generated scanning control signal to said scanning driving circuit,
• wherein said signal processing unit sends out a data signal to each of data signal transmission wirings in a same phase and said data signal transmission wirings are arranged so that a direction of a data signal of a current flowing through said first data line driving circuit disposed on said left upper portion of said display panel and a direction of a data signal of a current flowing through said second data line driving circuits disposed on said left lower portion of said display panel become reversed to each other and so that a direction of a data signal of a current flowing through said third data line driving circuit disposed on said right upper portion of said display panel and a direction of a data signal of a current flowing through said fourth data line driving circuit disposed on said right lower portion of said display panel are reversed to each other, and so that a direction of a data signal of a current flowing through said first data line driving circuit disposed on said left upper portion of said display panel and a direction of a data signal of a current flowing through said third data line driving circuit disposed on said right upper portion of said display panel.

A transmission signal control method to be applied to an image display device comprising:

• a display panel including a plurality of display regions each having predetermined columns of data lines, predetermined rows of scanning lines, and a plurality of pixel each disposed at an intersection between each of said data lines and each of said scanning lines;
• a plurality of data line driving circuits each arranged on data line terminal side margins of said display panel to write pixel data, based on a transmitted data signal, to each of each of said data lines in a corresponding display region;
• a scanning line driving circuit to output a scanning driving signal to drive each of said scanning lines in a predetermined order based on a given scanning control signal;
• and
• a signal processing unit, based on a given video signal, to generate a data signal and to transmit the generated data signal to a corresponding one of data line driving circuits through a corresponding data signal transmission wiring and to generate said scanning control signal and to transmit the generated scanning control signal to said scanning driving circuit, and
• said transmission signal control method comprising:
• a step of inverting polarities of all data signals, when a gray level of said data signal is compared with a gray level of said data signal occurred before being transmitted to each of data line driving circuits and if an amount of change in gray level is larger than a predetermined value, by using a polarity inversion notification signal generating section mounted on said signal processing unit, for each of said data line driving circuits, to transmit to a corresponding one of said data line driving circuits and generating a polarity inversion notification signal showing that polarities of all said data signals have been inverted to transmit to each of said data line driving circuits through said notification signal transmission wiring;
• a step of setting, for every notification signal transmission line, an initial polarity of said polarity inversion notification signal to be generated by said polarity, inversion notification signal generating section mounted on a polarity inversion notification signal initial polarity setting section;
• and
• a step of inverting a polarity of said transmitted data signal based on said polarity inversion notification signal by using each of said data line driving circuits.

A transmission signal control method to be used in an image display device including a plurality of display regions each having predetermined columns of data lines, predetermined rows of scanning lines, and a plurality of pixel each disposed at an intersection between each of said data lines and each of said scanning lines, a plurality of data line driving circuits arranged on specified data line terminal side margins of said display panel to write pixel data, based on a transmitted data signal, to each of data lines in a corresponding display region, a scanning line driving circuit to output a scanning driving signal to drive each of said scanning lines in a predetermined order based on a given scanning control signal, a signal processing unit, based on a given video signal, to generate a data signal and to transmit the generated data signal to a corresponding one of said data line driving circuits through a data signal transmission wiring and to generate said scanning control signal and to transmit the generated scanning control signal to said scanning driving circuit, said transmission signal control method comprising:

• a step of performing setting, by using said signal processing unit, so that a direction of a current of said data signal flowing through one of said data line driving circuits and a direction of a current of said data signal flowing through another of said data line driving circuits are reversed to each other.