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AssigneesHitachi, Ltd., Hitachi Video & Information System, Inc.
InventorsHideki Kamimaki, Kiyokazu Nishioka, Tsuguji Tachiuchi, Nobuo Tsuchiya, Masahiro Jinushi, Hitoshi Sadamitsu, Hiroshi Ito, Takashi Yoshitomi, Koichi Isaji, Takao Ohba
Estimating the term…
A data processing apparatus which includes a display unit and a power supply controller for supplying power to the display unit. The display unit has a display screen and a back light controller. The power supply controller comprises a switch, at least one output line for receiving the power from the switch and for supplying therethrough the power to electronic devices, a delay circuit for receiving the power from the switch and when the switch is turned ON to start supply of the power, for outputting the power after passage of a predetermined time from the start of the power supply, and a second output line for supplying the power from the delay circuit to the back light controller therethrough. The display unit has a memory means for storing therein a luminance data on the display screen through the back light controller when the power supply is turned OFF and for determining an output state of the display unit through the back light controller on the basis of the luminance data read out from the memory means when the power supply is turned ON. Further, the data processing apparatus has a means for invalidating output of a display data to be output onto the display screen and a means, after the display data is invalidated, for reducing a frequency of a timing signal or invalidating output of the timing signal for the display unit.
A power supply controller for supplying power to a plurality of electronic devices divided into a first group of electronic devices and a second group of electronic devices, said power supply controller comprising:
A power supply controller for controlling supply of power to electronic devices to reduce a peak current capacity requirement wherein said electronic devices are divided into a plurality of groups of electronic devices and supply of power to said plurality of groups is started at a different timing with respect to each group of electronic devices of said plurality of groups, for distributing peak start-up currents of said plurality of groups over time, thereby reducing a peak current capacity requirement of said power supply controller.
A data processing apparatus comprising:
A data processing apparatus having an arrangement to reduce a peak current capacity requirement, said apparatus comprising:
Dependencies are inferred from the claim text.