Electrical transmission or interconnection systems – Miscellaneous systems – Power packs
Reexamination Certificate
2000-01-28
2003-07-29
Sircus, Brian (Department: 2836)
Electrical transmission or interconnection systems
Miscellaneous systems
Power packs
C307S089000, C307S091000, C307S147000, C307S149000, C361S143000
Reexamination Certificate
active
06600243
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an information processing device that is capable of being operated by battery, and in more particular, to the mounting and power-supply configuration of the battery for a notebook type personal computer.
2. Description of Related Art
There are notebook type personal computers that are used, for example, as in the case of the notebook type computer device disclosed in Japanese Patent Application Publication Heisei 5-143192, wherein a battery pack of rechargeable secondary batteries (hereafter called batteries) is mounted in the main body. In many cases the battery pack is detachable/attachable from the notebook computer, and in order to avoid being partially inserted due to mishandling by the operator such that only the positive or negative power-supply wire is connected, the distance between the two power-supply terminals is made as short as possible when it is connected to the notebook PC.
SUMMARY OF THE INVENTION
As shown in
FIG. 12
, if the battery pack
50
, as described above, contains batteries with a negative terminal on the opposite side of the positive terminal, positive
54
and negative
53
power-supply wires must run from both ends of the battery
56
.
In the case of this kind of construction, the impedance from the supply terminal
57
for supplying current to the notebook PC to the battery terminals
51
,
52
is a minimum at the supply terminal
57
, and is a maximum at the battery terminals
51
,
52
. Therefore, if noise generated from the LSI or signal wires in the notebook PC
58
is transferred as high-frequency current to the power-supply wires
53
,
54
in the battery pack, reflection occurs at the battery terminals
51
,
52
, and by superimposing the reflected waves with the incident waves, a standing wave, whose wavelength is equal to double the length of the power-supply wire L
55
, is generated (see FIG.
13
). Therefore, the power-supply wires
53
,
54
act as an antenna and make it easy to radiate noise to the outside.
The object of this invention is to provide an information processing device that is operable with battery which has little radiation noise and which suppresses the generation of standing waves.
In order to accomplish the aforementioned object, the present invention provides, in an information processing device with means which connects to a battery pack that stores a battery for supplying power to the information processing device, for example, at least one capacitive element (for example a capacitor) mounted in the proximity of the terminals of the positive and negative poles of the battery when the battery pack is connected to the information processing device. At least the terminal of the positive pole of the battery or the terminal of the negative pole of the battery may be connected electrically to the ground of the information processing device through this capacitive element. Here, what is meant by proximity is, for example, between the positive or negative pole and the terminal, or between the positive or negative pole of the battery and the circuit first connected by the battery.
It is also possible to connect the terminal of the negative pole of the battery to the ground of the information processing device without the capacitive element.
In addition, this invention provides a battery pack comprising means in the proximity of at least the positive terminal or negative terminal of the battery for connecting electrically the positive terminal or negative terminal of the battery to the ground of the information processing device.
It is possible to provide a capacitive element between the terminal of the positive pole of the battery and the terminal of the negative pole of the battery, and to connect the terminal of the positive pole and the terminal of the negative pole of the battery through the capacitive element.
Moreover, the present invention provides, for example, an information processing device comprising at least one capacitive element and at least one of means which connects electrically between the capacitive element and the terminal of the positive pole of the battery or the terminal of the negative pole of the battery, wherein the capacitive element connects electrically to ground.
Here, the means which connects electrically to the terminal of the negative pole of the battery can be connected electrically to ground without the capacitive element.
Moreover, the present invention provides, for example, a battery pack comprising capacitive elements and means provided in the proximity of the terminal of the positive pole of the battery and terminal of the negative pole of the battery, respectively, for connecting the capacitive elements and the ground of the information processing device, wherein the terminal of the positive pole of the battery and the terminal of the negative pole of the batter are connected electrically to ground through the capacitive elements provided in the proximity of the terminal of the positive pole of the battery and terminal of the negative pole of the battery, respectively.
Here, it is also possible to connect the terminal of the negative pole of the battery to ground without the capacitive element.
The present invention also provides a battery, for example, comprising a capacitive element wherein the positive pole and the negative pole of the battery are connected electrically through the capacitive element.
Moreover, the present invention provides an information processing device, for example, comprising a ground connector provided between both ends of the battery pack and the connector which electrically connects the positive pole and negative pole of the battery.
Furthermore, this invention provides an information processing device, for example, comprising a ground connector located between both ends of the battery pack and the connector which electrically connects the positive pole and negative pole of the battery and within a distance of ¼ or preferably ⅕ the length of the battery pack from the both ends of the substrate of the battery pack.
REFERENCES:
patent: 4668873 (1987-05-01), Ohba et al.
patent: 5227805 (1993-07-01), King et al.
patent: 5517069 (1996-05-01), Zibrik et al.
patent: 5912597 (1999-06-01), Inagawa et al.
patent: 6013957 (2000-01-01), Puzo et al.
patent: 6175624 (2001-01-01), Brundieck et al.
patent: 6376931 (2002-04-01), Kim
patent: WO 96/08863 (1996-03-01), None
patent: 5-143192 (1993-06-01), None
Hara Tsutomu
Kasai Mariko
Kato Nobuhiro
Matsuoka Tatsuhiko
Yokokura Giichirou
DeBeradinis Robert L
Hitachi , Ltd.
Mattingly Stanger & Malur, P.C.
Sircus Brian
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