Display device and method of driving same

A method of driving a display device comprising

• selecting a row of pixels in a matrix array of pixels, and supplying a video signal to each of said selected pixels, said video signal being a binary signal corresponding to one bit of n bit data representing a gray scale,
• wherein
• n pixel rows forming one of a plurality of groups are selected successively in a first columnwise direction within one of unit basic scanning periods,
• each of said plurality of groups being formed of n pixel rows arranged to be spaced from a preceding pixel row thereof by rows successively smaller in number by a factor of approximately 2,
• said unit basic scanning periods being a subdivision of one field period,
• then n pixel rows forming another one of said plurality of groups moved by one row in a second columnwise direction opposite from said first columnwise direction are selected successively in said first columnwise direction within another one of said unit basic scanning periods succeeding said one thereof,
• thereafter said successive selecting of n pixel rows forming one of said plurality of groups is repeated by moving one row at a time in said second columnwise direction, and
• each of n pixel rows forming each of said plurality of groups is supplied with a binary signal corresponding to a different bit position of said n bit data, respectively, within a corresponding one of said unit basic scanning periods.

A method of driving a display device comprising

• selecting a row of pixels in a matrix array of pixels, and supplying a video signal to each of said selected pixels, said video signal being a binary signal corresponding to one bit of n bit data representing a gray scale,
• wherein
• n pixel rows forming one of a plurality of groups are selected successively in a first columnwise direction,
• each of said plurality of groups being formed of n pixel rows arranged to be spaced from a preceding pixel row thereof by rows successively smaller in number by a factor of approximately 2,
• then n pixel rows forming another one of said plurality of groups moved by one row in a second columnwise direction opposite from said first columnwise direction are selected successively in said first columnwise direction,
• thereafter said successive selecting of n pixel rows forming one of said plurality of groups is repeated by moving one row at a time in said second columnwise direction, and
• each of n pixel rows forming each of said plurality of groups is supplied with a binary signal corresponding to a different bit position of said n bit data, respectively.

A display device which selects a row of pixels in a matrix array of pixels, and supplying a video signal to each of said selected pixels, said video signal producing a gray scale represented by n bit data,

• said display device comprising:
• a scanning drive circuit for selecting successively n pixel rows forming one of a plurality of groups in a first columnwise direction within one of unit basic scanning periods,
• each of said plurality of groups being formed of n pixel rows arranged to be spaced from a preceding pixel row thereof by rows successively smaller in number by a factor of approximately 2, said unit basic scanning periods being a subdivision of one field period,
• then selecting n pixel rows forming another one of said plurality of groups moved by one row in a second columnwise direction opposite from said first columnwise direction, successively in said first columnwise direction within another one of said unit basic scanning periods succeeding said one thereof, and
• thereafter repeating said successive selecting of n pixel rows forming one of said plurality of groups by moving one row at a time in said second columnwise direction;
• and
• a video signal drive circuit for supplying binary signals to respective ones of n pixel rows forming each of said plurality of groups, within a corresponding one of said unit basic scanning periods, said binary signals corresponding to different bit positions of said n bit data, respectively.

A liquid crystal display device comprising:

• a pair of opposing substrates;
• a liquid crystal layer sandwiched between said pair of substrates;
• a plurality of gate signal lines extending in one direction and arranged in another direction intersecting said one direction on a liquid-crystal-layer side surface of one of said pair of opposing substrates;
• a plurality of drain signal lines arranged to intersect said plurality of gate signal lines;
• a plurality of pixel areas each surrounded by two adjacent ones of said plurality of gate signal lines and two adjacent ones of plurality of drain signal lines,
• each of said plurality of pixel areas being provided with a switching element operated by a scanning signal from one of said plurality of gate signal lines, and a pixel electrode supplied with a video signal from one of said plurality of drain signal lines via said switching element;
• a scanning drive circuit for scanning successively a plural number of gate signal lines forming one of a plurality of groups, among said plurality of gate signal lines, in a first direction in parallel with said another direction within a unit scanning period,
• each of said plurality of groups being formed of said plural number of gate signal lines arranged to be spaced from a preceding gate signal line thereof by lines successively smaller in number by a factor of approximately 2,
• then scanning said plural number of gate signal lines forming another one of said plurality of groups moved by one gate signal line in a second direction opposite from said first direction, successively in said first direction within another unit scanning period succeeding said one unit scanning period, and
• thereafter repeating said successive selecting of said plural number of gate signal lines forming one of said plurality of groups by moving one gate signal line at a time in said second direction;
• and
• a video signal drive circuit supplied with n-bit display data representing a gray scale for each pixel and supplying binary signals to respective ones of said plurality of drain signal lines in synchronism with said successive scanning of said plural number of gate signal lines within a corresponding one of said unit scanning periods, said binary signals corresponding to different bit positions of said n bit data, respectively.

A liquid crystal display device comprising:

• a pair of opposing substrates;
• a liquid crystal layer sandwiched between said pair of substrates;
• a plurality of gate signal lines extending in one direction and arranged in another direction intersecting said one direction on a liquid-crystal-layer side surface of one of said pair of opposing substrates;
• a plurality of drain signal lines arranged to intersect said plurality of gate signal lines;
• a plurality of pixel areas each surrounded by two adjacent ones of said plurality of gate signal lines and two adjacent ones of plurality of drain signal lines,
• each of said plurality of pixel areas being provided with a switching element operated by a scanning signal from one of said plurality of gate signal lines, and a pixel electrode supplied with a video signal from one of said plurality of drain signal lines via said switching element;
• a scanning drive circuit for scanning successively a plural number of gate signal lines forming one of a plurality of groups, among said plurality of gate signal lines, in a first direction in parallel with said another direction within a unit scanning period,
• each of said plurality of groups being formed of said plural number of gate signal lines arranged to be spaced from a preceding gate signal line thereof by lines successively smaller in number by a factor of approximately 2,
• then scanning said plural number of gate signal lines forming another one of said plurality of groups moved by one gate signal line in a second direction opposite from said first direction, successively in said first direction within another unit scanning period succeeding said one unit scanning period,
• thereafter repeating said successive selecting of said plural number of gate signal lines forming one of said plurality of groups by moving one gate signal line at a time in said second direction;
• a video signal drive circuit supplied with n-bit display data representing a gray scale for each pixel from a field memory and supplying binary signals to respective ones of said plurality of drain signal lines in synchronism with said successive scanning of said plural number of gate signal lines within a corresponding one of said unit scanning periods, said binary signals corresponding to different bit positions of said n bit data, respectively;
• and
• said field memory storing in a plurality of cells thereof n-bit information representing gray scales to be written into pixels, and outputting corresponding n-bit information in synchronism with said successive scanning of said plurality of gate signal lines.