Boots – shoes – and leggings
Patent
1993-10-13
1996-07-02
Cosimano, Edward R.
Boots, shoes, and leggings
307 31, 340636, 364152, 364707, 395750, H02J 100
Patent
active
055329357
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an electronic device driven by a battery, and in particular to a portable computer or word processor in which the consumption of power required to operate power-consumption-variable components is controlled.
2. Discussion of the Background
The operating time period of a computer driven by a battery is determined by the amount of power consumed thereby since the maximum capacity of a battery is limited. The amount of power consumed by a computer varies depending upon factors such as the brightness of the display device employed, the frequency of the operation clock determining the speed of processing by the CPU, and the time periods during which power is supplied to various input/output devices. Power consumption will be high if the brightness of the display device is set to high level, the frequency of the operation clock is high, and power is supplied to each input/output device for long time periods. The greater the power consumption, the shorter the operating time period of the computer.
A battery-driven computer therefore has a power save function for prolonging its operating period to as long as possible. This function comprises a CPU sleep function, a magnetic disk (HDD) auto-power-off function, a display auto-power-off function, etc. Techniques relating to the power save function are disclosed in U.S. Pat. Nos. 4,907,183, 4,980,836, and 5,083,266.
In the case of the conventional power save functions, however, even if the user wishes to use the computer for a given time period, a power consumption amount corresponding to the time period desired cannot be set. In other words, although the user is aware that the operating time period of the computer will be prolonged by virtue of the power save functions, he cannot know at what degree each power save function is effected so as to use the computer for a desired time period.
SUMMARY OF THE INVENTION
It is an object of the invention to provide an electronic device capable of automatically controlling the power consumption of each component in accordance with an operating time period designated by the user.
It is another object of the invention to provide an electronic device capable of automatically controlling the brightness level of the display device employed in accordance with an operating time period designated by the user.
It is a further object of the invention to provide an electronic device capable of automatically controlling a plurality of power save functions in accordance with an operating time period designated by the user.
It is another object of the invention to provide an electronic device capable of automatically controlling the level of each power save function on the basis of the estimated power consumption of a given component.
It is yet another object of the invention to provide an electronic device capable of monitoring the duty cycle of each component at regular intervals, and correcting the power consumption of the component so that the device can be used for a time period designated by the user.
The present invention can provide an electronic device driven by a battery, comprising: a device component driven by power supplied from the battery; time period setting means for setting an operating time period during which the electronic device is operated by the battery; capacity detection means for detecting a remaining capacity of the battery; and power control means for controlling the amount of power supplied to the device component on the basis of the operating time period set by the time period setting means and the remaining capacity detected by the capacity detection means.
Since only user's setting of an operation time period on the time period setting means can cause the power control means to automatically control the power consumption on the basis of the battery capacity and the set time period, the user can operate the device efficiently. Further, since the power control means sets a power consumption amount in accordance with the set oper
REFERENCES:
patent: 3522421 (1970-08-01), Miller
patent: 3535560 (1970-10-01), Cliff
patent: 4907183 (1990-03-01), Tanaka
patent: 4980836 (1990-12-01), Carter et al.
patent: 5083266 (1992-01-01), Watanabe
Gunji Shizuka
Muraya Hideaki
Ninomiya Ryoji
Cosimano Edward R.
Kabushiki Kaisha Toshiba
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