Liquid crystal display apparatus

A liquid crystal display apparatus comprising:

• a liquid crystal panel having m signal lines extending in the vertical direction, n scanning lines extending in the lateral direction and a plurality of pixels arranged in a matrix pattern in a display area which is divided into blocks from a first block to an Lth block (where 1<L<n) extending in the lateral direction;
• a backlight illuminating the liquid crystal panel;
• a source driver outputting video signals and non-video signals to the respective signal lines;
• a gate driver outputting gate signals to the respective scanning lines;
• a first control unit controlling the non-video signals so as to have a non-video signal writing period in which the non-video signals are written in the respective pixels, a video writing period in which the video signals are written in the respective pixels, and a video holding period in which the video signals written in the respective pixels are held in sequence in this order, and controlling each block to have the non-video signal writing period, the video writing period and the video holding period in this order;
• and
• a second control unit controlling illumination and extinction of the backlight.

A liquid crystal display apparatus comprising:

• a liquid crystal panel having m signal lines extending in the vertical direction, n scanning lines extending in the lateral direction and a plurality of pixels arranged in a matrix pattern in a display area which is divided into blocks from a first block to an Lth block (where 1<L<n) extending in the lateral direction;
• a backlight illuminating the liquid crystal panel;
• a source driver outputting video signals and non-video signals to the respective signal lines;
• a gate driver outputting gate signals to the respective scanning lines;
• a first control unit controlling the non-video signals to have a non-video signal writing period in which the non-video signals are written in the respective pixels, a video writing period in which the video signals are written in the respective pixels, and a video holding period in which the video signals written in the respective pixels are held in sequence in one frame period in this order;
• and
• a second control unit controlling illumination and extinction of the backlight,
• wherein the first control unit
• (1) controls the each block to have the non-video signal writing period, the video writing period and the video holding period in this order, and
• (2) controls the video writing period of the kth block (where 1<k<L) to be delayed with respect to the video writing period of the (k−1)th block by a predetermined time period.

A liquid crystal display apparatus comprising:

• a liquid crystal panel having m signal lines extending in the vertical direction, n scanning lines extending in the lateral direction and a plurality of pixels arranged in a matrix pattern in a display area which is divided into blocks from a first block to an Lth block (where 1<L<n) extending in the lateral direction;
• a backlight illuminating the liquid crystal panel and including a light source for the each block;
• a source driver outputting video signals and non-video signals to the respective signal lines;
• a gate driver outputting pulsed gate signals to the respective scanning lines;
• a first control unit controlling the non-video signals so as to have a non-video signal writing period in which the non-video signals are written in the respective pixels, a video writing period in which the video signals are written in the respective pixels, and a video holding period in which the video signals written in the respective pixels are held in sequence in this order, the first control unit (1) controlling the each block to have the non-video signal writing period, the video writing period and the video holding period in this order, and (2) controlling the video writing period of the kth block (where 1<k≦L) to be delayed with respect to the video writing period of the (k−1)th block by a predetermined time period;
• and
• a second control unit controlling illumination and extinction of the backlight, the second control unit (1) correcting the luminance of the light source of the kth block within a predetermined range of the luminance of the light source of the (k−1)th block, and (2) illuminating the respective light sources at the corrected luminance only in the video holding period of each block and extinguishes the same during other periods.

A liquid crystal display apparatus comprising:

• a liquid crystal panel having m signal lines extending in the vertical direction, n scanning lines extending in the lateral direction and a plurality of pixels arranged in a matrix pattern in a display area which is divided into blocks from a first block to an Lth block (where 1<L<n) extending in the lateral direction;
• a backlight illuminating the liquid crystal panel and including a light source for each block;
• a source driver outputting video signals and non-video signals to the respective signal lines;
• a gate driver outputting pulsed gate signals to the respective scanning lines;
• a first control unit controlling, in each block, the non-video signals to have a non-video signal writing period in which the non-video signals are written in the respective pixels, a video writing period in which the video signals are written in the respective pixels, and a video holding period in which the video signals written in the respective pixels are held in sequence in one frame period in this order;
• and
• a second control unit controlling illumination and extinction of the backlight, the second control unit (1) calculating the luminance of the each light source for each frame period on the basis of the video signals, (2) correcting the luminance of the each light source in the current frame period into a luminance included in a predetermined range of an average value of the luminance of the each light source in one frame period before the current frame period, and (3) illuminating the each light source at the corrected luminance only in the video holding period of each block and extinguishes the same in other periods.