An ink container shell for an ink jet cartridge has spaced apart side walls, a front wall, a rear wall, and a bottom wall, and is provided with a partition structure which divides the interior thereof into three ink chambers, at least one of which has a non-rectangular profile in cross-section transverse to said side, front and rear walls. With this arrangement, the difference of the delay between the pathways of the video signals from the video lines to the sampling circuit is compensated and this makes it possible to eliminate the non-uniformity of luminance looking like lines in the display apparatus so as to improve the display quality of the same. These files can be used to create new and different skin appearances, layouts and functionalities.