Driving control apparatus of display apparatus, display method, display apparatus, display monitor, and television receiver

A driving control apparatus of a display apparatus which displays an image by time-dividing one frame of an input image signal into first to n-th (n is an integer not less than 2) sub frames,

• the driving control apparatus comprising:
• signal generation means for generating first to n-th display signals for the first to n-th sub frames, respectively, in such a way that a total sum of brightness of a display screen of a display module in one frame is not changed by a division of the frame;
• and
• signal correction means for generating a corrected display signal in such a way that, to improve a response speed of a pixel in which a grayscale level of a first display signal of an N-th frame (N is an integer not less than 2), the first display signal being generated by the signal generation means, is changed for more than a predetermined value with respect to a grayscale level of an input image signal of an (N-1)-th frame, the grayscale of the first display signal for the pixel is corrected, but grayscale levels of second to n-th display signal are not corrected,
• the signal generation means generating the first display signal from the input image signal without an intervention of a frame memory storing the input image signal, and generating display signals of the second to n-th sub frames by reading out the input image signal stored in the frame memory.

A display method for displaying an image by time-dividing one frame of an input image signal into first to n-th (n is an integer not less than 2) sub frames,

• the method comprising the steps of:
• (i) generating first to n-th display signals for the first to n-th sub frames, respectively, in such a way that a total sum of brightness of a display screen of a display module in one frame is not changed by a division of the frame;
• and
• (ii) generating a corrected display signal in such a way that, to improve a response speed of a pixel in which a grayscale level of a display signal of a first sub frame of an N-th frame (N is an integer not less than 2), the display signal being generated by the step (i), is changed for more than a predetermined value with respect to a grayscale level of an input image signal of an (N-1)-th frame, the grayscale of the first display signal for the pixel is corrected,
• in the step (i), (a) adjusting the grayscale level of the first display signal within a range from a minimum value to a second predetermined value which is smaller than a maximum value and setting grayscale levels of the second to n-th display signals to be a value which is identical with the minimum value when an image having low brightness is displayed, and (b) the grayscale level of the first display signal being set at the second predetermined value and adjusting the grayscale levels of the second to n-th display signals within a range from the minimum value to the maximum value, when an image having high brightness is displayed, and
• in the step (ii), the grayscale level of the first display signal is corrected within a range from the minimum value to the maximum value, but the grayscale levels of the second to n-th display signals are not corrected.

A display method for displaying an image by time-dividing one frame of an input image signal into first to n-th (n is an integer not less than 2) sub frames,

• the method comprising the steps of:
• (i) generating first to n-th display signals for the first to n-th sub frames, respectively, in such a way that a total sum of brightness of a display screen of a display module in one frame is not changed by a division of the frame;
• and
• (ii) generating a corrected display signal in such a way that, to improve a response speed of a pixel in which a grayscale level of a first display signal of an N-th frame (N is an integer not less than 2), the first display signal being generated by the signal generation means, is changed for more than a predetermined value with respect to a grayscale level of an input image signal of an (N-1)-th frame, the grayscale of the first display signal for the pixel is corrected, but grayscale levels of second to n-th display signals are not corrected,
• in the step (i), the first display signal being generated from the input image signal without an intervention of a frame memory storing the input image signal, and display signals of the second to n-th sub frames being generated by reading out the input image signal stored in the frame memory.