Method for driving active matrix type liquid crystal display

A drive circuit for an active matrix type display, wherein

• in said active matrix type display,
• liquid crystal is sealed between a first substrate and a second substrate,
• said first substrate comprises switching elements and pixel electrodes connected to said switching elements, both of which are provided in correspondence to pixels that are arranged in a matrix, selection lines for sequentially selecting said switching elements, and data lines for supplying display data to said switching elements that are connected, and
• said second substrate comprises an opposing electrode for controlling, in conjunction with each of said pixel electrode on said first substrate, said liquid crystal,
• said drive circuit comprising:
• an opposing electrode controller capable of periodically changing, in a predetermined period, an opposing electrode voltage which is applied to said opposing electrode;
• and
• a data line voltage controller capable of:
• applying a change alleviating voltage onto said data lines during said change in said opposing electrode voltage, wherein said change alleviating voltage is a predetermined voltage capable of alleviating a change in voltage on said data lines, which is set independent from said display data;
• setting a data line voltage on said data lines to said change alleviating voltage;
• and maintaining said data line voltage at said change alleviating voltage when said opposing electrode voltage changes through application of said change alleviating voltage on said data lines.

A method for driving an active matrix type liquid crystal display, wherein

• in said active matrix type liquid crystal display,
• liquid crystal is sealed between a first substrate and a second substrate;
• said first substrate comprises switching elements and pixel electrodes connected to said switching elements, both of which are provided in correspondence to pixels that are arranged in a matrix, selection lines for sequentially selecting said switching elements, and data lines for supplying display data to said switching elements that are connected;
• and
• said second substrate comprises an opposing electrode for controlling, in conjunction with each of said pixel electrodes on said first electrode, said liquid crystal, said method comprising:
• periodically changing, in a predetermined period, an opposing electrode voltage to said opposing electrode;
• applying a change alleviating voltage onto said data line, during a period when output of a selection signal for said switching element in said pixel is stopped and output of said display data onto said data line is stopped, wherein said change alleviating voltage is a predetermined voltage capable of alleviating a change in voltage on said data lines, which is independent from said display data;
• setting a data line voltage on said data lines to said change alleviating voltage;
• and
• maintaining said data line voltage at said change alleviating voltage when said opposing electrode voltage changes through application of said change alleviating voltage on said data lines.

A drive circuit for an active matrix type liquid crystal display, wherein

• in said active matrix type liquid crystal display,
• liquid crystal is sealed between a first substrate and a second substrate,
• said first substrate comprises switching elements and pixel electrodes connected to said switching elements, both of which are provided in correspondence to pixels that are arranged in a matrix, selection lines for sequentially selecting said switching elements, and data lines for supplying display data to said switching elements that are connected, and
• said second substrate comprises an opposing electrode for controlling, in conjunction with each of said pixel electrodes on said first substrate, said liquid crystal,
• said drive circuit comprising:
• a vertical scan driver which outputs a selection signal to said selection line at a predetermined timing;
• a horizontal scan driver which outputs display data to said data line at a predetermined timing;
• an opposing electrode controller capable of periodically changing, in a predetermined period, an opposing electrode voltage which is applied to said opposing electrode;
• a data line voltage controller capable of applying a change alleviating voltage onto said data lines during said change in said opposing electrode voltage, wherein said change alleviating voltage is a predetermined voltage capable of alleviating a change in voltage on said data lines, which is independent from said display data;
• setting a data line voltage on said data lines to said change alleviating voltage;
• and maintaining said data line voltage at said change alleviating voltage when said opposing electrode voltage changes through application of said change alleviating voltage on said data lines;
• and
• a timing controller which receives a clock signal and a synchronization signal and generates an enable signal, an alleviation control signal which is output after a predetermined period after output of said enable signal, and a change control signal capable of changing said opposing electrode voltage, wherein
• said vertical scan driver stops output of said selection signal based on said enable signal;
• said horizontal scan driver stops output of said display data based on said enable signal;
• said data line voltage controller applies said change alleviating voltage onto said data line based on said alleviation control signal;
• and
• said opposing electrode controller changes said opposing electrode voltage based on said change control signal.