Hitachi, Ltd.

Bunichi Fujimaki

Tsutomu Furuhashi

Hideki Kamimaki

Kiyokazu Nishioka

Kohji Takahashi

Koichi Isaji

An information processing equipment capable of multicolor display, comprising a CPU; a display memory which stores display information therein; a display unit which displays the display information in multiple colors selected from a predetermined number of colors to-be-developed; a display control circuit which controls transfer of information between the CPU and the display memory, and which regularly reads out the display information stored in the display memory and then sends the read-out display information to the display unit; a mode selector which selects one of at least two modes consisting of a first mode and a second mode, and which produces selection information, wherein the first mode causes the display unit to develop a smaller number of multiple colors and to operate at a lower frequency, while the second mode causes the display unit to develop a large number of multiple colors and to operate at a higher frequency; a clock signal generator which generates a plurality of clock signals of unequal frequencies; a clock selector circuit which receives the selection information to select the clock signal of the frequency corresponding to the mode indicated by the selection information, from among the plurality of clock signals delivered from the clock signal generator, and which delivers the selected clock signal to, at least, the display control circuit; and a maximum-number-of-colors selector which is provided in, for example, the display unit, and which receives the selection information to control the number of colors to-be-developed that are to be displayed by the display unit, to the number corresponding to the mode indicated by the selection information.

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Komaki, Japan

Bunichi Fujimaki