Image display device and driving method thereof

A driving method of an image display device, said device comprising:

• a plurality of pixels disposed in a matrix;
• a display section, having a plurality of data signal lines for respective columns of the plurality of pixels and having a plurality of scanning signal lines corresponding to respective rows of the plurality of pixels, for displaying an image by writing a video signal from each data signal line into each pixel in synchronism with a scanning signal which is outputted from each scanning signal line;
• a data signal line driving circuit for outputting said video signal to said plurality of data signal lines;
• a scanning signal line driving circuit for outputting said scanning signal to said plurality of scanning signal lines;
• and
• a pre-charging circuit for charging said plurality of data signal lines to a pre-charging voltage in a predetermined period of time in accordance with a pre-charging control signal,
• said driving method comprising the step of supplying said pre-charging voltage to a pre-charging voltage stabilizing section which is composed of current controlling means and charge holding means and is provided on a preceding stage of said pre-charging circuit, said pre-charging voltage having an AC voltage in synchronism with one horizontal period of said video signal.

A driving method of an image display device, said device comprising:

• a plurality of pixels disposed in a matrix;
• a display section, having a plurality of data signal lines for respective columns of the plurality of pixels and having a plurality of scanning signal lines corresponding to respective rows of the plurality of pixels, for displaying an image by writing a video signal from each data signal line into each pixel in synchronism with a scanning signal which is outputted from each scanning signal line;
• a data signal line driving circuit for outputting said video signal to said plurality of data signal lines;
• a scanning signal line driving circuit for outputting said scanning signal to said plurality of scanning signal lines;
• and
• a pre-charging circuit for charging said plurality of data signal lines to a pre-charging voltage in a predetermined period of time in accordance with a pre-charging control signal,
• said driving method comprising the step of supplying said pre-charging voltage to a pre-charging voltage stabilizing section which is composed of current controlling means and charge holding means and is provided on a preceding stage of said pre-charging circuit, said pre-charging voltage having a DC voltage in synchronism with one horizontal period of said video signal.

A driving method of an image display device, said device comprising:

• a plurality of pixels disposed in a matrix;
• a display section, having a plurality of data signal lines for respective columns of the plurality of pixels and having a plurality of scanning signal lines corresponding to respective rows of the plurality of pixels, for displaying an image by supplying a video signal from each data signal line to each pixel in correspondence with a scanning signal which is supplied from each scanning signal line;
• a data signal line driving circuit for outputting a video signal to the plurality of data signal lines in synchronism with a predetermined timing signal;
• a scanning signal line driving circuit for outputting a scanning signal to the plurality of scanning signal lines by a pulse width control signal which controls an output signal in synchronism with a scanning start signal and a scanning timing signal, and a signal width of the output signal;
• a pre-charging circuit for charging the plurality of data signal lines to a pre-charging voltage by a pre-charging control signal in a predetermined period of time;
• pre-charging voltage stabilizing means for stabilizing a pre-charging voltage from the pre-charging circuit;
• and
• a control signal generating circuit for supplying the circuits with a control signal so as to control operations thereof,
• said driving method comprising the step of suspending a scanning signal for a predetermined period of time when a pre-charging voltage stabilizing circuit having charge holding means and current controlling means as the pre-charging voltage stabilizing means is used to perform display at fixed brightness in first and second display areas which are respectively provided corresponding to a first portion and/or a second portion on a screen of the display section by a pre-charging voltage inputted from the pre-charging circuit.

An image display device, comprising:

• a plurality of pixels disposed in a matrix;
• a display section, having a plurality of data signal lines for respective columns of the plurality of pixels and having a plurality of scanning signal lines corresponding to respective rows of the plurality of pixels, for displaying an image by supplying a video signal from each data signal line to each pixel in correspondence with a scanning signal which is supplied from each scanning signal line;
• a data signal line driving circuit for outputting a video signal to the plurality of data signal lines in synchronism with a predetermined timing signal;
• a scanning signal line driving circuit for outputting a scanning signal to the plurality of scanning signal lines by a pulse width control signal which controls an output signal in synchronism with a scanning start signal and a scanning timing signal, and a signal width of the output signal;
• a pre-charging circuit for charging the plurality of data signal lines to a pre-charging voltage by a pre-charging control signal in a predetermined period of time;
• pre-charging voltage stabilizing means for stabilizing a pre-charging voltage from the pre-charging circuit;
• and
• a control signal generating circuit for supplying the circuits with a control signal so as to control operations thereof,
• wherein:
• the pre-charging voltage stabilizing means includes a pre-charging voltage stabilizing circuit having charge holding means and current controlling means, and
• in a non-match image display mode, one portion of the display section is set as a video data non-display area which avoids display of video data,
• said image display device, further comprising:
• a control signal generating section for suspending a scanning signal for a predetermined period of time is provided in the control signal generating circuit, when performing display at fixed brightness in the video data non-display area by a pre-charging voltage inputted from the pre-charging circuit.