Liquid crystal display method and liquid crystal display device improving motion picture display grade
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Abstract
A source driver outputs a data signal and a reset (black) signal alternately to a source line. Four-hundred and eighty gate lines are divided into three groups each comprising 160 lines, and connected to gate drivers. A display control section outputs a discriminant signal, a scan start signal and a clock signal to the gate drivers, where the nth gate line is selected with the data signal outputted by the source driver, and where the (n+160)th gate line is selected with the reset signal outputted. Further, n is shifted sequentially. By writing the reset signal during the latter ⅓ of one frame like this, light leakage of pixels that are changed over from white display to black display is eliminated. Also, blurs of edge portions of a motion picture are reduced. Thus, display grade for motion pictures is enhanced with a minimum improvement.
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Citations
58 Claims
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1-23. -23. (canceled)
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24. A method for displaying an image on a display device having a plurality of column lines arrayed in parallel to each other, a plurality of row lines arranged in parallel to each other in a direction in which the row lines intersect the column lines, and a plurality of pixels provided corresponding to each of intersecting points of the plurality of column lines and the plurality of row lines, the method comprising:
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(a) a step for supplying a select signal to one of the row lines from nth row line to n+mth (n>
0, m>
1) row line of the plurality of row lines and also supplying respective data signals to each of the plurality of column lines, thereby supplying the respective data signals to the pixels corresponding to the intersections of the one of the row lines and the plurality of column lines; and
(b) a step for, before or after step (a), supplying a select signal to at least one of the row lines from the 1th (1>
n+m, or 1+m<
n) row line to the 1+mth row line of the plurality of row lines, and also supplying a black display signal to each of the plurality of column lines, thereby supplying the black display signal to the pixels corresponding to the intersections of the plurality of column lines with at least one of the plurality of row lines;
wherein the black display signal and the respective data signal are supplied to each of the plurality of pixels within a time period of one frame period by performing each of step (a) and step (b) a plurality of times, and each of the plurality of pixels holds a state, in which the black display signal is supplied, for at least the time period corresponding to one-fourth of one frame period. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A display device having:
a display panel in which are formed at least a plurality of column lines arrayed in parallel to one another, a plurality of row lines arranged in parallel to one another in a direction in which the row lines intersect the column lines, and pixels provided corresponding to intersecting points of the column lines and the row lines;
a column line driver for supplying a data signal to the column lines; and
a row driver for supplying a select signal to the row lines, the display device comprising;
a display control section for supplying an image signal and a control signal to the column line driver, while supplying a control signal to the row line driver, thereby controlling image display operation to the display panel;
black display signal generating means for generating a black display signal for displaying a black image at the pixels; and
a selector switch provided in the column line driver and operative for switchedly selecting alternately between a data signal based on an image signal derived from the display control section and a black display signal derived from the black display signal generating means, wherein the display control section supplies to the row line driver the control signal for making the row lines selected, where the select signal is supplied to one of the row lines from the nth row line to the n+mth row line of the plurality of row lines, where n>
0, m>
1, while the data signal is selected by the selector switch, and where the select signal is supplied to at least one of the row lines from the 1th row line to the 1+mth row line of the plurality of row lines, where 1>
n+m or 1+m<
n, while the black display signal is selected by the selector switch, andeach of the plurality of pixels holds a state in which the black signal is supplied for at least the time period corresponding to one-fourth of one frame period. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
Specification