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

Abstract

In a display apparatus having a display panel 301 having display devices which are arranged in a matrix layout and driven through a plurality of row wirings and column wirings, a scanning unit 302 adapted to scan the row wirings, and a modulation unit 303 adapted to supply a modulation signal to the column wiring based upon image data, a compensation unit 304 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 units 306 A, 306 B, 306 C adapted to control display luminance of the display panel, based upon luminance information of the image data are provided.

1 . A display apparatus comprising:
 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;   a modulation unit adapted to supply a modulation signal to the column wiring based upon image data;   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 control display luminance of the display panel, based upon luminance information of the image data.   
   
   
       2 . A display apparatus according to  claim 1 , wherein
 the luminance control unit changes a drive voltage which is applied to the display panel in accordance with the luminance information.   
   
   
       3 . A display apparatus according to  claim 1 , wherein
 the luminance control unit changes a drive voltage which is applied to the display panel in accordance with the luminance information, and changes a parameter of the compensation processing in the compensation unit.   
   
   
       4 . A display apparatus according to  claim 1 , wherein
 the luminance control unit changes luminance level of the image data before the compensation processing or after the compensation processing in accordance with the luminance information.   
   
   
       5 - 7 . (canceled) 
   
   
       8 . A display apparatus according to  claim 1 , wherein
 the luminance control unit changes display luminance of the display panel in accordance with the luminance information and a luminance limitation reference value which was set, and   the luminance limitation reference value can be changed by at least one of power consumption of the display apparatus, a user interface unit or an external environment detection unit.   
   
   
       9 . 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.   
   
   
       10 . 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.   
   
   
       11 . A drive control apparatus according to  claim 10 , wherein
 a parameter of the compensation processing is changed in accordance with change of the drive voltage.   
   
   
       12 . 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.   
   
   
       13 . 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.   
   
   
       14 . A drive control method according to  claim 13 , wherein
 a parameter of the compensation processing is changed in accordance with change of the drive voltage.   
   
   
       15 . (canceled)