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    POWER UNIT AND ELECTRONIC EQUIPMENT FOR LEAK CURRENT PREVENTION
    1.
    发明专利
    POWER UNIT AND ELECTRONIC EQUIPMENT FOR LEAK CURRENT PREVENTION 失效

    公开(公告)号：JPH10240392A

    公开(公告)日：1998-09-11

    申请号：JP4225597

    申请日：1997-02-26

    Applicant: IBM

    Inventor： MICHIGAMI TORU ,  NAKAZAWA YUKIFUMI ,  NAITO ZAISEI

    IPC: G06F1/26 ,  G06F1/32

    Abstract: PROBLEM TO BE SOLVED: To prevent a leak current at the time of power-off concerning a remote power on/off type power supply system using a momentary switch. SOLUTION: In case of power-off, namely, in the off state of switch SW2, no power is supplied to a latch circuit 30 so that no power is consumed without fail. Besides, a switch driving circuit 40 does not originally consume power. When a user presses a momentary switch SW1 in the off state of switch SW2, the switch SW2 is turned on by the switch driving circuit 40. As a result, the latch circuit 30 can receive a driving voltage Vcc from the downstream side of switch SW2 so as to latch the on state of momentary switch SW1. When the user releases the momentary switch SW1 later, the momentary switch SW1 itself immediately recovers its original position and with this recovery, the on operation of SW2 due to the switch driving circuit 40 is stopped as well. At such a time, however, the on state of SW2 can be held by the operation of latch circuit 30 already.

    INFORMATION PROCESSOR AND POWER SAVING DEVICE
    2.
    发明专利
    INFORMATION PROCESSOR AND POWER SAVING DEVICE 失效

    公开(公告)号：JPH1139769A

    公开(公告)日：1999-02-12

    申请号：JP19280197

    申请日：1997-07-17

    Applicant: IBM

    Inventor： FUJII KAZUO ,  ASAUMI TAKESHI ,  NAKAZAWA YUKIFUMI

    IPC: G11B19/00 ,  G06F1/32 ,  H03G3/10 ,  H03G3/34 ,  H04R3/00

    Abstract: PROBLEM TO BE SOLVED: To save the power of an audio amplifier by providing an audio amplifier amplifyingly processing audio signals from peripheral equipments and an AND gate which receives mute signals from peripheral equipments of one or more and which outputs a control signal reducing the power of the amplifier when all mute signal are in mute states while ANDing the mute signals. SOLUTION: Mute signals from, for example, five sets of peripheral equipments having mute signal outputs indicating mute states in which audio signals are not outputted are ANDed in an AND gate 52 and when all peripheral equipments are in mute states, the assert signal of the gate 52 indicates that an audio amplifier 51 is unused. The output of the AND gate 52 is inputted to the power saving control pin of the audio amplifier 51. When the input is in a negated state, the amplifier 51 performs an amplifying procession and when the input is in an asserted state, the amplifier is in a power saving state and it is made impossible to perform the amplifying processing of audio signals and, then, the lowering of power consumption is made possible.

    COMPUTER WITH ILLUMINATOR FOR KEYBOARD
    3.
    发明专利
    COMPUTER WITH ILLUMINATOR FOR KEYBOARD 失效

    公开(公告)号：JP2001022470A

    公开(公告)日：2001-01-26

    申请号：JP19178099

    申请日：1999-07-06

    Applicant: IBM

    Inventor： TAKAHASHI TOMOYUKI ,  YAMAZAKI KAZUHIKO ,  YOSHIDA SHIGERU ,  NAKAZAWA YUKIFUMI ,  KAWASHIMA NOBUYUKI

    IPC: G06F3/02 ,  F21V33/00 ,  F21Y101/02 ,  G06F1/16

    Abstract: PROBLEM TO BE SOLVED: To actualize keyboard lighting which saves the space and has small power consumption, is usable even by battery driving, and exerts no adverse effect on a display device by irradiating a keyboard with the light emitted by an LED through an opening part. SOLUTION: When a computer 10 is used, a rear cover 105 is opened and stopped at 90 deg. or more and the keyboard 103 is operated while looking at an LCD. The computer 100 is provided internally with an LED holder 150 holding the LED for keyboard lighting and an LED switch 113. An opening part is formed in the bottom of the LED holder 150; and part of the light emitted by the LED is cut off by the bottom part and the rest is emitted out of the LED holder 150 through the opening part. While the rear cover 105 is opened, the LED is turned on by operating the switch 113 to light up the keyboard 103.

    CONNECTION STRUCTURE OF DAA
    5.
    发明专利
    CONNECTION STRUCTURE OF DAA 失效

    公开(公告)号：JPH0888669A

    公开(公告)日：1996-04-02

    申请号：JP21350994

    申请日：1994-09-07

    Applicant: IBM

    Inventor： FUJII KAZUO ,  NAKAZAWA YUKIFUMI ,  NOGUCHI TAKEHIKO

    IPC: G06F3/00 ,  H04L29/10 ,  H04M11/06

    Abstract: PURPOSE: To enable the selection of either built-in DAA or external DAA and to miniaturize MODEM board. CONSTITUTION: A hybrid circuit 14 connected to a MODEM circuit 12 and a built-in DAA 24 are mounted on a MODEM board. These hybrid circuit 14 and the built-in DAA 24 are respectively connected to an interface connector 18. When a plug subcard 26 equipped with a MiniDin connector 28 is inserted into this interface connector 18, an external DAA 32 and the MODEM circuit 12 are connected through the hybrid circuit 14 on the MODEM board. When another plug subcard equipped with an RJ11 connector is inserted, the built-in DAA 24 is connected through the hybrid circuit 14 to the MODEM circuit 12. Thus, communication due to analog signals corresponding to either the built-in DAA 24 or the external DAA 32 is allowed.

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