Image display apparatus

An image display apparatus for displaying an image signal representing digital data of n bits with a number of gradation levels determined by the bit number n, comprising:

• a display panel implemented by disposing display elements each capable of sustaining displayed state of a signal written in a given selected period over a period other than said selected period in a matrix-like array of pixels;
• a vertical drive circuit for scanning sequentially and selectively on a row-by-row basis said display elements of said matrix-like array constituting said display panel;
• and
• a horizontal drive circuit for writing a voltage from voltages previously assigned with binary values in conformance with the digital data of the image signal to be displayed to the display elements of the row selected by said vertical drive circuit;
• said horizontal drive circuit and said vertical drive circuit being so designed as to selectively scan said display pixels at least n times within a single frame period in synchronism with said image signal to be displayed for thereby displaying said image signal with multiple gradation levels;
• wherein said vertical drive circuit is comprised of line data latch circuits in a number not smaller than said bit number n at the least and so arranged as to output a driving voltage for said active matrix display elements in dependence on a result of sequential additions of logical signals representing products of bit-based outputs of said line data latch circuits and a control signal for dividing horizontal scanning period.