APPARATUS FOR SCROLLING DISPLAY IMAGES

摘要

Apparatus for scrolling the display of images obtained from a plurality of data units, each having pattern signals representing a plurality of horizontal lines and a corresponding colour signal, comprises a video display (15) having a plurality of horizontal display lines, a first memory (14P) for storing the pattern signals formed with first addresses corresponding to the plurality of horizontal display lines and a first buffer area for temporarily storing received pattern signals, and a second memory (14C) for storing the colour signal formed with second addresses corresponding to the numbers of the data units and a second buffer area for temporarily storing a received colour signal, the pattern signals and a corresponding colour signal being stored in the first and second buffer areas, respectively. A read out system (16 - Figure 9) operates so that the first memory (14P), including the first buffer area, is read out by accessing the first addresses in a predetermined order and so that the second memory (14C), including the second buffer area, is read out by accessing the second addresses in a predetermined order. Also provided is a circuit for transferring the pattern signal of a horizontal line stored in the first buffer area to a corresponding address of the first memory (14P) and for transferring a corresponding colour signal stored in the second buffer area to a corresponding address of the second memory (14C), and a circuit for supplying the pattern signals and the corresponding colour signal to the video display (15).