DISPLAY DEVICE AND PORTABLE TERMINAL DEVICE USING IT

摘要

PROBLEM TO BE SOLVED: To reduce power consumption in a light emitting display element used for the display device of the terminal of a mobile such as a portable telephone. SOLUTION: Under the stand-by condition in which power supply is ON and an interrupt signal 16 is not generated, this device is controlled so as not to light the dot display part of an organic EL display and to display only critical data by a character display part, and when the interrupt signal 16 is generated, by displaying corresponding to the data input from a keyboard 3 or an input/output circuit 14 only for a fixed display period. Thus, the low power consumption of the display device can be attained without spoiling convenience.