Display device for producing overlapped display of character patterns

Claim 1

A display device comprising: (a) keyboard means for producing character code signals representing characters; (b) character generating means for converting each character code signal produced by said keyboard means into a corresponding character pattern signal representing a character pattern; (c) memory means for storing at locations therein character pattern signals supplied from said character generating means; (d) means for visually representing a character pattern represented by the character pattern signal stored in said memory means; (e) means for generating a composite character display signal; and (f) control means, responsive to a composite character display signal generated by said composite character display signal generating means, for causing a character pattern signal supplied from said character generating means after generation of a composite character display signal to be stored at a single location in said memory means in overlapping relation with a character pattern signal supplied from said character generating means before generation of the composite character display signal thereby to produce a composite character pattern signal.