Truncation error compensation device for image display

The utility model provides a truncation error compensation device for image display. It comprises an input bus, a numeration device, a data storage device, a summator and a comparator. The numeration device includes a row counter and a tier counter. The data storage device includes a threshold value matrix memory, a high order memory and a low order memory. The summator includes a carry computation adder and a value adder. The truncation error compensation device for image display provided can convert the pixel loading value with multiple bit widths into the output value with less bit widths; after conducting the dithering process to images, it does not create any effect of blurring margins to images. The device has simple structure and fast processing velocity.