Driver device, driving method, and display device

A driver device for driving a display panel,

• the display panel including (i) a plurality of scan lines, (ii) a plurality of video signal lines provided so as to intersect the plurality of scan lines, (iii) pixel regions defined by the plurality of scan lines and the plurality of video signal lines, (iv) pixel electrodes provided in the respective pixel regions and (v) TFTs each electrically connecting or disconnecting, in response to a scan signal supplied to a corresponding one of the plurality of scan lines, a corresponding one of the pixel electrodes with or from a corresponding one of the plurality of video signal lines, respectively,
• said driver device, comprising:
• a scan line driving circuit for sequentially supplying scan signals to the plurality of scan lines;
• a video signal line driving circuit for sequentially supplying video signals to the plurality of video signal lines;
• and
• a timing control circuit for controlling (i) a timing at which the scan line driving circuit supplies a scan signal and (ii) a timing at which the video signal line driving circuit supplies video signals,
• the scan line driving circuit carrying out a first scan in which (i) the scan line driving circuit starts to supply a first scan signal, which has an intermediate electric potential between a voltage of a low level in a time period during which an (n+m)th (n:
• positive integer, m:
• positive integer) scan line is not scanned and a voltage of a high level, to the (n+m)th scan line during a scan period during which an nth scan line is being scanned and (ii) the scan line driving circuit stops supplying the first scan signal to the (n+m)th scan line when scanning of the nth scan line is completed,
• the scan line driving circuit carrying out a second scan in which the scan line driving circuit supplies a second scan signal, which has the voltage of the high level, to the (n+m)th scan line when the scanning of the nth scan line is completed,
• the scan line driving circuit being capable of changing, for each of the plurality of scan lines, at least one of (i) a scan period of the first scan and (ii) the intermediate electric potential, and
• in a case where each polarity of the video signals to be supplied to the plurality of video signal lines is not reversed, the scan line driving circuit carrying out at least one of (i) a process of shortening the scan period of the first scan and (ii) a process of decreasing the intermediate electric potential in the first scan.

A method of driving a driver device that drives a display panel,

• the display pane including (i) a plurality of scan lines, (ii) a plurality of video signal lines provided so as to intersect the plurality of scan lines, (iii) pixel regions defined by the plurality of scan lines and the plurality of video signal lines, (iv) pixel electrodes provided in the respective pixel regions and (v) TFTs each electrically connecting or disconnecting, in response to a scan signal supplied to a corresponding one of the plurality of scan lines, a corresponding one of the pixel electrodes with or from a corresponding one of the plurality of video signal lines, respectively,
• the driver device including:
• a scan line driving circuit for sequentially supplying scan signals to the plurality of scan lines;
• a video signal line driving circuit for sequentially supplying video signals to the plurality of video signal lines;
• and
• a timing control circuit for controlling (i) a timing at which the scan line driving circuit supplies a scan signal and (ii) a timing at which the video signal line driving circuit supplies video signals,
• said method comprising the steps of:
• (a) carrying out a first scan in which (i) the scan line driving circuit starts to supply a first scan signal, which has an intermediate electric potential between a voltage of a low level in a time period during which an (n+m)th (n:
• positive integer, m:
• positive integer) scan line is not scanned and a voltage of a high level, to the (n+m)th scan line during a scan period during which an nth scan line is being scanned and (ii) the scan line driving circuit stops supplying the first scan signal to the (n+m)th scan line when scanning of the nth scan line is completed;
• (b) carrying out a second scan in which the scan line driving circuit supplies a second scan signal, which has the voltage of the high level, to the (n+m)th scan line when the scanning of the nth scan line is completed;
• and
• (c) carrying out, before a primary scan which includes the step (a) and the step (b), a preliminary scan in which a preliminary scan signal is supplied to each of the plurality of scan lines,
• the step (c) includes the steps of:
• (d) carrying out a second preliminary scan in which a preliminary scan signal, which has a voltage of a high level, is supplied;
• and
• (e) carrying out a first preliminary scan in which a preliminary scan signal, which has an intermediate electric potential between (i) a voltage of a low level in a time period during which the each of the plurality of scan lines is not scanned and (ii) the voltage of the high level, is supplied,
• the step (e) being continued, in the step (c), from when the step (d) is completed to when the step (a) is started.