Electrical computers and digital processing systems: support – Computer power control
Reexamination Certificate
1997-11-19
2001-08-14
Wiley, David (Department: 2155)
Electrical computers and digital processing systems: support
Computer power control
C713S322000, C713S310000, C713S340000, C713S330000, C713S323000, C710S108000, C710S108000, C710S108000, C710S100000, C361S689000, C361S689000, C361S695000, C361S698000, C361S699000, C361S704000
Reexamination Certificate
active
06275945
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a computer system, being applied to a personal computer capable of using an expanded unit, having a radiator for radiating heat of an interior of a computer main body.
In recent years, a portable small-sized personal computer has been developed as a data processor for a personal digital assistants (PDA) having multi-functions such as a communication function.
In addition to the miniaturization of the entire apparatus, improvement of calculation processing ability and various peripheral functions have been made in such a portable small-sized personal computer. Particularly, there has been developed a computer system, using an expanded unit (or an optional unit), which is called “docking station” or “port replicater”, for expanding data processing function of the main body of the computer.
On the other hand, in the portable small-sized personal computer, since it is necessary to drive the computer by a built-in battery other than AC commercial power source, a saving of consumption power is required. Due to this, various kinds of saving systems are developed. In the recent small-sized personal computer, the saving of consumption power tends to be increased in accordance with the high performance and multi-function.
Generally, if the calculation processing ability of CPU is increased, the amount of heat in the computer is increased. As a result, an effective radiation mechanism is needed. As the radiation mechanism, a cooling fan and a heat sink are known. The heat sink is formed in the vicinity of a circuit board on which circuit elements such a CPU are mounted.
In the portable small-sized personal computer, it is difficult to ensure a space enough to provide the radiation mechanism other than the structural elements such as a circuit board in the housing body. Particularly, in a thin typed (notebook typed) small-sized personal computer, it is impossible to provide the cooling fan in view of the structure. Moreover, in the case of the radiation mechanism using the heat sink, since the surface area of the heat sink is limited, the radiation effect cannot be efficiently obtained.
Thus, in recent years, particularly, in the portable small-sized personal computer, there is a tendency that consumption power is increased in accordance with the multi-function and improvement of the calculation processing ability of CPU. On the other hand, it is difficult to provide the radiation mechanism for obtaining a sufficient radiation effect in order to miniaturize the main body of the apparatus.
If the radiation effect of the computer main body is insufficient, the processing ability of the computer main body cannot be performed at its maximum. Due to this, in the conventional case, for operating the circuit element, e.g., CPU, of the computer main body by the operation clock, the operation of the circuit element is limited as follows:
More specifically, the circuit element is operated for short time by a high speed operation clock. Or, the circuit element is operated for long time by a low speed operation. As a result, the performance of the computer system can be lowered than the performance, which is based on the design specification.
BRIEF SUMMARY OF THE INVENTION
An object of the present invention is to provide a small-sized computer system in which an expanded unit is used to miniaturize the entire body of the device and improve the radiation effect of a computer main body in the computer system using the expanded unit.
According to the present invention, there is provided a computer system comprising:
an expanded unit, having a structure to be detachable from a computer main body, connected to the computer main body to realize a predetermined expanded function;
first radiator material, provided in the computer main body, for radiating an interior of the computer main body;
second radiator material, provided in the expanded unit, for radiating the interior of the computer main body; and
connecting means for connecting the first and second radiator material to each other when the expanded unit is inserted to the computer main body.
According to the above-mentioned computer system, the first and second material are connected to each other by use of the expanded unit, so that the surface area of the radiator material of the computer main body can be increased. In miniaturizing the computer main body, the surface area of the first radiator material, which is built in the computer main body, is decreased. However, as a whole, the surface area of the radiator material of the computer main body can be increased. In other words, there can be realized the radiator material of the computer main body having the surface area which can obtain the sufficient radiation effect.
As a result, if the expanded unit is used, the sufficient radiation effect can be obtained, and the temperature rise of the computer main body due to high-speed operation of such as CPU can be controlled. Therefore, the long time operation of such as CPU at the relatively high speed operation clock can be executed, and the performance of the computer main body can be performed in accordance with the design specification (a normal power mode or a full power mode).
Additional object and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The object and advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
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Kato Keiichi
Tsuji Hiroyuki
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Jean Frantz B.
Kabushiki Kaisha Toshiba
Wiley David
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