Patent ID: 6127999
Filing Date: 2000-10-03
Classification: G06T

Abstract:
A graphic image display apparatus comprising:a CPU;a line buffer for temporarily storing graphic data for display; anda display control circuit connected between said CPU and said line buffer, said display control circuit comprising,a graphic ROM for storing image source data for graphics to be displayed, said graphic ROM being designed and adapted to output graphic data for display in response to an interface signal of said CPU, andan output circuit connected to said graphic ROM and having a data dot selecting means for changing a dot order of said graphic data for display,said output circuit being connected between said line buffer and said graphic ROM,said display control circuit being designed and adapted to selectively vertically invert said output graphic data for display, and to selectively horizontally invert said output graphic data for display independently of the selective vertical inversion,said data dot selecting means comprising a counter for generating an ordinary order of dot addresses, and a converter connected between said counter and a dot selector for inverting said ordinary order of dot addresses to generate an inverted order of dot addresses in response to a right/left inverting signal,said dot selector being connected between said graphic ROM and said line buffer for selecting dots of said graphic data for display in accordance with one of said ordinary order and said inverted order.