Data processing apparatus

Details Data processing apparatus Data processing apparatus

2005-09-06

2005-09-06

Butler, Dennis M. (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

Power conservation

C713S322000, C713S323000

Reexamination Certificate

active

06941481

ABSTRACT:
A data processing apparatus has a first processing unit for processing an input data, a second processing unit responsive to the data processed by the first processing unit for executing a processing dependent on the data and producing a display data, and a display unit having a display drive unit and a display device for displaying the display data. The second processing unit is selectively inactivated and activated under control of the first processing unit to reduce power consumption in the second processing unit. The display drive unit is also selectively inactivated and activated under control of the first processing unit to reduce power consumption in the display unit. The display device has a memory function that maintains its display image even when supply of a display drive signal from the display drive unit is stopped, so that a latest image before inactivation of the second processing unit and/or the display drive unit for power consumption reduction is visible by an operator during the inactivated and low power consumption state of the apparatus.

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