Display apparatus, and image signal processing apparatus and drive control apparatus for the same

An image signal processing apparatus for processing image data to be inputted to a display apparatus having a display panel having display devices which are arranged in a matrix layout and driven through a plurality of row wirings and column wirings, a scanning unit adapted to scan the row wirings, and a modulation unit adapted to supply a modulation signal to the column wiring based upon input image data,

• the image signal processing apparatus comprising:
• a compensation unit adapted to apply compensation processing for compensating at least fluctuation of display luminance due to influence of voltage drop which is occurred by a resistance of the row wiring to the image data;
• and
• a luminance control unit adapted to change luminance level of the image data to control display luminance of the display panel, based upon luminance information of the image data.

A drive control apparatus for controlling a drive of a display apparatus having a display panel having display devices which are arranged in a matrix layout and driven through a plurality of row wirings and column wirings, a scanning unit adapted to scan the row wirings, and a modulation unit adapted to supply a modulation signal to the column wiring based upon input image data,

• the drive control apparatus comprising:
• a compensation unit adapted to apply compensation processing for compensating at least fluctuation of display luminance due to influence of voltage drop which is caused by a resistance of the row wiring to the image data;
• and
• a luminance control unit adapted to change a drive voltage of the display panel to control display luminance of the display panel, based upon luminance information of the image data.

An image signal processing method for processing image data to be inputted to a display apparatus having a display panel having display devices which are arranged in a matrix layout and driven through a plurality of row wirings and column wirings, a scanning unit adapted to scan the row wirings, and a modulation unit adapted to supply a modulation signal to the column wiring based upon input image data,

• the image signal processing method comprising:
• a compensation step of applying compensation processing for compensating at least fluctuation of display luminance due to influence of voltage drop which is occurred by a resistance of the row wiring to the image data;
• and
• a luminance control step of changing luminance level of the image data to control display luminance of the display panel, based upon luminance information of the image data.

A drive control method for controlling a drive of a display apparatus having a display panel having display devices which are arranged in a matrix layout and driven through a plurality of row wirings and column wirings, a scanning unit adapted to scan the row wirings, and a modulation unit adapted to supply a modulation signal to the column wiring based upon input image data,

• the drive control method comprising:
• a compensation step of applying compensation processing for compensating at least fluctuation of display luminance due to influence of voltage drop which is occurred by a resistance portion of the row wiring to the image data;
• and
• a luminance control step of changing a drive voltage of the display panel to control display luminance of the display panel, based upon luminance information of the image data.

An image data processing circuit comprising:

• a first circuit for calculating an average picture level value of the image data;
• a multiplier for multiplying a coefficient by the image data;
• a second circuit for calculating a first coefficient for the multiplier based upon the average picture level value;
• a third circuit for calculating a second coefficient for the multiplier, the second coefficient being calculated so that the result of multiplying
• (1) image data having a value over an input range of a circuit to which data from the multiplier is inputted, and
• (2) the second coefficient falls in the input range;
• and
• a selection circuit for selecting the coefficient to be used in the multiplier from the first coefficient calculated by the second circuit and the second coefficient calculated by the third circuit.