(19)
(11) EP 1 571 886 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.07.2008 Bulletin 2008/27

(43) Date of publication A2:
07.09.2005 Bulletin 2005/36

(21) Application number: 05004563.2

(22) Date of filing: 02.03.2005
(51) International Patent Classification (IPC): 
H05B 1/02(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR LV MK YU

(30) Priority: 04.03.2004 JP 2004060138
25.02.2005 JP 2005049864

(71) Applicant: OMRON CORPORATION
Kyoto-shi, Kyoto 600-8530 (JP)

(72) Inventors:
  • Morikawa, Akihiko c/o Omron Corporation
    Shiokoji-dori Kyoto-shi Kyoto 600-8530 (JP)
  • Minami, Shigeki c/o Omron Corporation
    Shiokoji-dori Kyoto-shi Kyoto 600-8530 (JP)
  • Furukawa, Motohisa c/o Omron Corporation
    Shiokoji-dori Kyoto-shi Kyoto 600-8530 (JP)
  • Sawai, Daisuke c/o Omron Corporation
    Shiokoji-dori Kyoto-shi Kyoto 600-8530 (JP)

(74) Representative: Kilian, Helmut 
Wilhelms, Kilian & Partner Patentanwälte Eduard-Schmid-Strasse 2
81541 München
81541 München (DE)

   


(54) Control circuit and power control apparatus having the control circuit


(57) Providing a control circuit (20) which performs ON/OFF control of a switch section (3) connected between an AC power supply (5) and a heater (4), wherein the control circuit (20) performs control to allow the present turning ON of the switch section (3) when it is determined that an AC power supply (5) waveform (i.e., AC waveform) polarity at a previous turning ON at the switch section (3) is not the same as an AC waveform polarity at a present turning ON; and wherein the control circuit (20) performs control to inhibit the present turning ON of the switch section (3) when it is determined that the polarities are the same.







Search report