Field sequential driving type liquid crystal display apparatus capable of increasing brightness while supressing irregularity, and its driving method

A sequential driving method for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame in a liquid crystal display apparatus including a plurality of data lines, a plurality of gate lines, and a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell and one of said data lines and having a gate connected to one of said gate lines, comprising the steps of:

• writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frame;
• sequentially writing one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines while said gate lines are sequentially selected after said black signals are written into all of said liquid crystal pixels;
• and
• turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frames after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said sequential writing step sequentially selects the 1st, the n-th, the 3rd, the (n−2)-th, . . . , the (n−1)-th and the 2nd gate lines where n is a number of said gate lines and is an even number.

A sequential driving method for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame in a liquid crystal display apparatus including a plurality of data lines, a plurality of gate lines, and a plurality of liquid, crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell and one of said data lines and having a gate connected to one of said gate lines, comprising the steps of:

• writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• sequentially writing one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines while said gate lines are sequentially selected after said black signals are written into all of said liquid crystal pixels;
• and
• turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frame after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said sequential writing step sequentially selects the n-th, the 1st, the (n−2)-th, the 3rd, . . . , the 2nd and the (n−1)-th gate lines where n is a number of said gate lines and is an even number.

A sequential driving method for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame in a liquid crystal display apparatus including a plurality of data lines, a plurality of gate lines, and a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell and one of said data lines and having a gate connected to one of said gate lines, comprising the steps of:

• writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• sequentially writing one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines while said gate lines are sequentially selected after said black signals are written into all of said liquid crystal pixels;
• and
• turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frames after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said sequential writing step sequentially selects the 2nd, the (n−1)-th, the 4-th, the (n−3)-th, . . . , the n-th and the 1st gate lines where n is a number of said gate lines and is an even number.

A sequential driving method for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame in a liquid crystal display apparatus including a plurality of data lines, a plurality of gate lines, and a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell and one of said data lines and having a gate connected to one of said gate lines, comprising the steps of:

• writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• sequentially writing one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines while said gate lines are sequentially selected after said black signals are written into all of said liquid crystal pixels;
• and
• turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frame after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said sequential writing step sequentially selects the (n−1)-th, the 2nd, the (n−3)-th, the 4-th, . . . , the 1st and the n-th gate lines where n is a number of said gate lines and is an even number.

A sequential driving method for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame in a liquid crystal display apparatus including a plurality of data lines, a plurality of gate lines, and a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell and one of said data lines and having a gate connected to one of said gate lines, comprising the steps of:

• writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• sequentially writing one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines while said gate lines are sequentially selected after said black signals are written into all of said liquid crystal pixels;
• and
• turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frame after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said sequential writing step sequentially selects the 1st, the (n−1)-th, the 3rd, the (n−3)-th, . . . , the 2nd and the n-th gate lines where n is a number of said gate lines and is an odd number.

A sequential driving method for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame in a liquid crystal display apparatus including a plurality of data lines, a plurality of gate lines, and a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell and one of said data lines and having a gate connected to one of said gate lines, comprising the steps of:

• writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• sequentially writing one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines while said gate lines are sequentially selected after said black signals are written into all of said liquid crystal pixels;
• and
• turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frames after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said sequential writing step sequentially selects the 1st, the n-th, the 3rd, the (n−2)-th, . . . , the (n−1)-th and the 2nd gate lines where n is a number of said gate lines for a first one of said sub-frames and is an even number, and sequentially selects the n-th, the 1st, the (n−2)-th, the 3rd, . . . , the 2nd and (n−1)-th gate lines for a second one of said sub-frames next to said first sub-frame.

A sequential driving method for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame in a liquid crystal display apparatus including a plurality of data lines, a plurality of gate lines, and a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell and one of said data lines and having a gate connected to one of said gate lines, comprising the steps of:

• writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• sequentially writing one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines while said gate lines are sequentially selected after said black signals are written into all of said liquid crystal pixels;
• and
• turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frame after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said sequential writing step sequentially selects the 2nd, the (n−1)-th, the 4-th, the (n−3)-th, . . . , the n-th and the 1st gate lines where n is a number of said gate lines for a first one of said sub-frames and is an even number, and sequentially selects the (n−1)-th, the 2nd, the (n−3)-th, the 4-th, . . . , the 1st and the n-th gate lines for a second one of said sub-frames next to said first sub-frame.

A field sequential driving type liquid crystal display apparatus for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame, comprising:

• a plurality of data lines;
• a plurality of gate lines;
• a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell and one of said data lines and having a gate connected to one of said gate lines;
• a black write circuit, connected to said data lines, for writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• a data driver circuit, connected to said data lines, for supplying one of said color signals to said data lines;
• a gate driver circuit, connected to said gate lines, for sequentially selecting said gate lines to sequentially write the one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines after said black signals are written into all of said liquid crystal pixels;
• a backlight control circuit for turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frame after the one of said color signals is written into all of the rows of said liquid crystal pixels;
• and
• a signal processing circuit, operatively connected to said data driver circuit, for compensating for a level of pixel components of the one of said color signals to be written into one of the rows of said liquid crystal pixels, so that a change of an average transmittivity of each of the rows of said liquid crystal pixels is sufficiently small before said end period.

A field sequential driving type liquid crystal display apparatus for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame, comprising:

• a plurality of data lines;
• a plurality of gate lines;
• a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said crystal cell and one of said data lines and having a gate connected to one of said gate lines;
• a black write circuit, connected to said data lines, for writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• a data driver circuit, connected to said data lines, for supplying one of said color signals to said data lines;
• first and second gate driver circuits, connected to said gate lines, for sequentially selecting said gate lines to sequentially write one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines after said black signals are written into all of said liquid crystal pixels;
• and
• a black light control circuit for turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frames after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said first and second gate driver circuits sequentially select the 1st, the n-th, the 3rd, the (n−2)-th, . . . , the (n−1)-th and the 2nd gate lines where n is a number of said gate lines and is an even number.

A field sequential driving type liquid crystal display apparatus for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame, comprising:

• a plurality of data lines;
• a plurality of gate lines;
• a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell one of said data lines and having a gate connected to one of said gate lines;
• a black write circuit, connected to said data lines, for writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• a data driver circuit, connected to said data lines, for supplying one of said color signals to said data lines;
• first and second gate driver circuits, connected to said gate lines, for sequentially selecting said gate lines to sequentially write one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines after said black signals are written into all of said liquid crystal pixels;
• and
• a backlight control circuit for turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frames after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said first and second gate driver circuits sequentially select the n-th, the 1st, the (n−2)-th, the 3rd, . . . , the 2nd and the (n−1)-th gate lines where n is a number of said gate lines and is an even number.

A field sequential driving type liquid crystal display apparatus for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame, comprising:

• a plurality of data lines;
• a plurality of gate lines;
• a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell and one of said data lines and having a gate connected to one of said gate lines;
• a black write circuit, connected to said data lines, for writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• a data driver circuit, connected to said data lines, for supplying one of said color signals to said data lines;
• first and second gate driver circuits, connected to said gate lines, for sequentially selecting said gate lines to sequentially write one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines after said black signals are written into all of said liquid crystal pixels;
• and
• a backlight control circuit for turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frames after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said first and second gate driver circuits sequentially select the 2nd, the (n−1)-th, the 4-th, the (n−3)-th, . . . , the n-th and the 1st gate lines where n is a number of said gate lines and is an even number.

A field sequential driving type liquid crystal display apparatus for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame, comprising:

• a plurality of data lines;
• a plurality of gate lines;
• a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell and one of said data lines and having a gate connected to one of said gate lines;
• a black write circuit, connected to said date lines, for writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• a data driver circuit, connected to said data lines, for supplying one of said color signals to said data lines;
• first and second gate driver circuits, connected to said gate lines, for sequentially selecting said gate lines to sequentially write one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines after said black signals are written into all of said liquid crystal pixels;
• and
• a backlight control circuit for turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frames after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said first and second gate driver circuits sequentially select the (n−1)-th, the 2nd, the (n−3)-th, the 4-th, . . . , the 1st and the n-th gate lines where n is a number of said gate lines and is an even number.

A field sequential driving type liquid crystal display apparatus for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame, comprising:

• a plurality of data lines;
• a plurality of gate lines;
• a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell and one of said data lines and having a gate connected to one of said gate lines;
• a black write circuit, connected to said date lines, for writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• a data driver circuit, connected to said data lines, for supplying one of said color signals to said data lines;
• first and second gate driver circuits, connected to said gate lines, for sequentially selecting said gate lines to sequentially write one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines after said black signals are written into all of said liquid crystal pixels;
• and
• a backlight control circuit for turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frames after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said first and second gate driver circuits sequentially select the 1st, the (n−1)-th, the 3rd, the (n−3)-th, . . . , the 2nd and the n-th gate lines where n is a number of said gate lines and is an odd number.

A field sequential driving type liquid crystal display apparatus for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame, comprising:

• a plurality of data lines;
• a plurality of gate lines;
• a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell and one of said data lines and having a gate connected to one of said gate lines;
• a black write circuit, connected to said data lines, for writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• a data driver circuit, connected to said data lines, for supplying one of said color signals to said data lines;
• first and second gate driver circuits, connected to said gate lines, for sequentially selecting said gate lines to sequentially write one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines after said black signals are written into all of said liquid crystal pixels;
• and
• a backlight control circuit for turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frames after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said first and second gate driver circuits sequentially select the 1st, the n-th, the 3rd, the (n−2)-th, . . . , the (n−1)-th and the 2nd gate lines where n is a number of said gate lines for a first one of said sub-frames and is an even number, and sequentially select the n-th, the 1st, the (n−2)-th, the 3rd, . . . , the 2nd and the (n−1)-th gate lines for a second one of said sub-frames next to said first sub-frame.

A field sequential driving type liquid crystal display apparatus for time-divisionally displaying a plurality of color signals in respective ones of sub-frames forming one frame, comprising:

• a plurality of data lines;
• a plurality of gate lines;
• a plurality of liquid crystal pixels, each including a liquid crystal cell and a switching element connected between said liquid crystal cell and one of said data lines and having a gate connected to one of said gate lines;
• a black write circuit, connected to said data lines, for writing black signals into all of said liquid crystal pixels at a beginning period of each of said sub-frames;
• a data driver circuit, connected to said data lines, for supplying one of said color signals to said data lines;
• first and second gate driver circuits, connected to said gate lines, for sequentially selecting gate lines to sequentially write one of said color signals into rows of said liquid crystal pixels each row connected to one of said gate lines after said black signals are written into all of said liquid crystal pixels;
• and
• a backlight control circuit for turning ON a respective one of a plurality of backlights each corresponding to one of said color signals at an end period of each of said sub-frames after the one of said color signals is written into all of the rows of said liquid crystal pixels,
• wherein said first and second gate driver circuits sequentially select the 2nd, the (n−1)-th, the 4-th, the (n−3)-th, . . . , the n-th and the 1st gate lines where n is a number of said gate lines for a first one of said sub-frames and is an even number, and sequentially select the (n−1)-th, the 2nd, the (n−3)-th, the 4-th, . . . , the 1st and the n-th gate lines for a second one of said sub-frames next to said first sub-frame.