Display control apparatus

A display control apparatus comprising:

• text data supply means for supplying text data having an m-bit width;
• graphics data supply means for supplying graphics data having an n-bit width, n being larger than m;
• means, connected to the text data supply means and to the graphics data supply means, for combining the m-bit-width text data, supplied from the text data supply means, with an (n-m)-bit data, thereby outputting an n-bit-width text data, in order to only display text on a display device, for outputting the n-bit-width graphics data supplied from the graphics data supply means, in order to only display graphics images on the display device;
• and
• means for outputting, for one of a plurality of dots constituting one pixel of the display device, the n-bit-width text data obtained by combining the m-bit-width text data, supplied from the text data supply means, with an (n-m)-bit data, and outputting, for another of the dots, the n-bit-width graphics data supplied from the graphics data supply means, in order to display both text and graphics images on the display device.

A display control apparatus for displaying a graphics image and text on a display device, the display control apparatus comprising:

• text data supply means for supplying 4-bit text data;
• graphics data supply means for supplying 8-bit graphics data;
• first means connected to the text data supply means and to the graphics data supply means, the first means combining the 4-bit text data with 4-bit fixed data, outputting 8-bit text data, and displaying the 8-bit text data on the display device;
• second means for outputting the 8-bit graphics data, and displaying the 8-bit graphics dot to the display device;
• and
• generating means for generating, for one of a plurality of dots constituting one pixel, 8-bit text data by combining the 4-bit text data with the 4-bit fixed data, and generating, for another of the dots, the 8-bit graphics data, the generating means thus superimposing the text data and graphics data upon each other on the display device;
• and
• display means connected to the generating means, for displaying an image on the basis of the 8-bit data output form the generating means;
• said generating means including:
• first multiplexer means for alternately outputting an upper 4 bits and a lower 4 bits of the 8-bit graphics data, for a time period to display one dot;
• delaying means connected to the first multiplexer means, for generating first data by delaying the upper bit data output from the first multiplexer means by the time period for displaying one dot and second data by delaying the lower bit output data by a time period for displaying two dots, respectively;
• means connected to the text data supply means, delaying means, and first multiplexer means, for outputting, for a first one of two dots constituting one pixel, 8-bit text data, and outputting, for a second one of the two dots, data obtained by combining the first data for the first dot, data obtained by combining the second data, and outputting, for the second dot, the 8-bit text data;
• the output means thus superimposing the text data and graphics data upon each other.