JP4350316B2 - Power circuit - Google Patents

Power circuit Download PDF

Info

Publication number
JP4350316B2
JP4350316B2 JP2001088700A JP2001088700A JP4350316B2 JP 4350316 B2 JP4350316 B2 JP 4350316B2 JP 2001088700 A JP2001088700 A JP 2001088700A JP 2001088700 A JP2001088700 A JP 2001088700A JP 4350316 B2 JP4350316 B2 JP 4350316B2
Authority
JP
Japan
Prior art keywords
control circuit
microcomputer
light receiving
infrared light
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2001088700A
Other languages
Japanese (ja)
Other versions
JP2002027565A (en
Inventor
貞之 下田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RYODEN CORPORATION
Seiko Instruments Inc
Original Assignee
RYODEN CORPORATION
Seiko Instruments Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US09/465,079 priority Critical patent/US6525666B1/en
Priority claimed from US09/465,079 external-priority patent/US6525666B1/en
Application filed by RYODEN CORPORATION, Seiko Instruments Inc filed Critical RYODEN CORPORATION
Priority to JP2001088700A priority patent/JP4350316B2/en
Publication of JP2002027565A publication Critical patent/JP2002027565A/en
Application granted granted Critical
Publication of JP4350316B2 publication Critical patent/JP4350316B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Description

【０００１】
【発明の属する技術分野】
この発明は、リモコン機能を持つ家庭用電化製品の電源回路に関する。とりわけこれら家庭用電化製品の待機時消費電流を低減する。
【０００２】
【従来の技術】
従来のリモコン機能を持つ家庭用電化製品の電源回路としては、図３の回路図に示されるような交流電圧を直流電圧に変換する手段（以下AC-DCコンバータと呼ぶ）を使用した電源回路が知られていた。即ち、AC-DCコンバータの出力電圧でリモコン用の制御回路ここではマイコン及び赤外線受光回路を駆動していた。
【０００３】
【発明が解決しようとする課題】
図３の回路ではテレビ等の家庭用電化製品において受像をオフにしてもリモコン信号を受ける為に赤外線受光回路とマイコンには電源を供給し続けなければならない。これを待機時消費電力と呼んでいる。しかしＡＣ−ＤＣコンバータの効率が悪くこの部分だけでも１Ｗ程度の電力を消費している。昨今の環境問題ではこの待機時の消費電力を極限まで低くすることが求められており現在の回路構成では到底実現できないものである。
【０００４】
【課題を解決するための手段】
このような問題点を解決するために、ＡＣ−ＤＣコンバータを常時動作させずに電荷蓄積手段たとえば2次電池や電気2重層コンデンサに電気を貯えてマイコン及び赤外線受光回路に電力を供給する。これら電荷蓄積手段の電圧が所定の値より、具体的にはマイコン及び赤外線受光回路の動作最低電圧以下に下がる前にＡＣ−ＤＣコンバータを動作させて電荷蓄積手段を充電し、所定の電圧以上、具体的にはマイコン及び赤外線受光回路の動作最高電圧に上がる前に充電を停止する。このようにしてＡＣ−ＤＣコンバータの動作頻度を減少させて最も電力効率の悪いＡＣ−ＤＣコンバータでの電力を低減することにより全体的な待機時消費電力を低減する事ができた。
【０００５】
【発明の実施の形態】
本発明は電荷蓄積手段から赤外線受光回路とマイコンに電力を供給する接続にし、電荷蓄積手段の電圧変動を電圧検出手段にて検出し、その出力信号によってＡＣ−ＤＣコンバータを動作させる構成とする。
【０００６】
【実施例】
（実施例１）
図１は本発明の実施例１を示す電源回路図である。ＡＣ入力からスイッチ１０７を介してＡＣ−ＤＣコンバータ１０１が接続され、その出力はメインマイコン１０２の正電源に供給される。また、その出力はダイオード１１６を介してサブマイコン１０４と赤外線受光回路１０３と電荷蓄積手段１０６の正電源に供給される。この正電源は電圧検出手段１０５で電圧モニターされ、電圧検出手段１０５の出力はスイッチ１０７の開閉信号に利用される。赤外線受光回路１０３は外部から赤外線信号１１５を受けて出力１１０を出力し、その信号はメインマイコン１０２とサブマイコン１０４に入力される。サブマイコン１０４からは信号１１１がスイッチ１０７を閉じる為に利用される。また信号１１１は遅延回路１１２を経てメインマイコン１０２に入力される。メインマイコン１０２の出力信号１１３と１１７はサブマイコン１０４に入力される。またサブマイコン１０４からはスイッチ１０７を開く為に利用される信号１１８が出力される。
【０００７】
次に図１の回路の動作を説明する。スイッチ１０７が開状態でＡＣ−ＤＣコンバータ１０１が停止しているとメインマイコン１０２は電源が供給されていない為停止している。電荷蓄積手段１０６が所定の電圧以下である場合は電圧検出手段１０５がスイッチ１０７を閉じるように信号を出す。これによりＡＣ−ＤＣコンバータ１０１が動作し電荷蓄積手段１０６が充電される。と同時に赤外線受光回路１０３とサブマイコン１０４にも電源が供給される為これら回路は動作状態にある。その後電荷蓄積手段１０６が充電され所定の電圧まで上昇すると、電圧検出手段１０５の出力は反転しスイッチ１０７を開きＡＣ−ＤＣコンバータが停止する。しかしこの時赤外線受光回路１０３とサブマイコン１０４には電荷蓄積手段１０６から電源が供給されその動作を継続する。
【０００８】
今、リモコンから電源オンの命令コードに相当する赤外線信号１１５が赤外線受光回路１０３に入力されると赤外線受光回路１０３はサブマイコン１０４に信号１１０を出す。サブマイコン１０４は動作中である為信号１１１をスイッチ１０７に出しスイッチ１０７を閉じさせる。この時ＡＣ−ＤＣコンバータ１０１は動作を開始する。ＡＣ−ＤＣコンバータ１０１が発生する電圧でメインマイコン１０２が動作を開始できる状態になる。実際には信号１１１を遅延回路１１２によって遅延させた信号でメインマイコン１０２が動作を開始する。この遅延回路はＡＣ−ＤＣコンバータ１０１が起動し、出力電圧が充分立ち上がってからメインマイコン１０２のリセット解除を行わせる為のものである。さらにメインマイコン１０２は、起動後に信号１１７をサブマイコン１０４に出し、サブマイコンの消費電流を低減する意味でサブマイコン１０４の動作を停止させても良い。この場合にはメインマイコン１０２が正常に動作を始めたという事実にもなる為この電源回路の信頼性が向上する。但しサブマイコン１０４の消費電流が無視できるぐらい小さい場合にはあえてサブマイコン１０４を停止させなくても良い。メインマイコン１０２が動作を開始するとその後の赤外線信号１１５は赤外線受光回路１０３で増幅、フィルタリングされ信号１１０としてメインマイコン１０２で処理されることになる。
【０００９】
次に、リモコンから電源オフの命令コードに相当する赤外線信号１１５が赤外線受光回路１０３に入力されると赤外線受光回路１０３はメインマイコン１０２に信号１１０を出す。メインマイコン１０２は信号１１３をサブマイコン１０４に出しサブマイコン１０４の動作を開始させる。サブマイコン１０４が正常に動作を始めると、サブマイコン１０４は信号１１８をスイッチ１０７に送出してスイッチ１０７を開く。この方法は、サブマイコン１０４の動作が正常であるという事実にもなる為この電源回路の信頼性が向上する。次に、ＡＣ−ＤＣコンバータ１０１が停止してメインマイコン１０２の電源供給が断たれる為、その動作も停止し消費電力の低減が図られる。電荷蓄積手段１０６の電荷は、ダイオード１１６によりメインマイコン１０２へ逆流はしない。
【００１０】
本発明では常に電荷蓄積手段１０６から赤外線受光回路１０３とサブマイコン１０４に電源が供給されている為、ＡＣ−ＤＣコンバータ１０１が働いていない状態でも常に赤外線信号１１５を受信できる状態になっている。この状態では赤外線受光回路１０３とサブマイコン１０４と電圧検出手段１０５しか動作していない為、全体の消費電流を低くすることができる。通常メインマイコン１０２は１０ＭＨｚ程度のクロックで動作させる為５０ｍＡ程度の電流が必要であるが、これをサブマイコン１０４のみを動かすようにすれば１００μＡ程度の消費電流で済ませることができる。また赤外線受光回路と電圧検出手段１０５の合計消費電流も１００μＡ程度で済む。
【００１１】
また、ＡＣ−ＤＣコンバータ１０１が動作するときは電荷蓄積手段の電圧が所定の電圧以下になった時だけである。このようにＡＣ−ＤＣコンバータ１０１が間欠的に動作することにより、ＡＣ−ＤＣコンバータ１０１での消費電力をさらに低減することができる。ここで、ＡＣ−ＤＣコンバータ１０１が動作する前記所定の電圧は電圧検出手段１０５により検知され、その電圧は赤外線受光回路１０３またはサブマイコン１０４の最低動作電圧付近の電圧である。一方、その後ＡＣ−ＤＣコンバータ１０１が動作を停止する時は、電荷蓄積手段１０６の電圧が充電により上昇し、その電圧が赤外線受光回路１０３またはサブマイコン１０４の最高動作電圧付近になった時に、電圧検出手段１０５の出力が反転することによって検知される。すなわち電圧検出手段１０５にヒステリシスを持たせてこれを実現する。また、この電圧検出はサブマイコン１０４がＡ／Ｄコンバータを有していればサブマイコンにやらせても良い。
【００１２】
本発明ではＡＣ−ＤＣコンバータの動作を停止させる手段としてスイッチを用いたがＡＣ−ＤＣコンバータ自体にオン／オフ機能を持たせてＡＣ−ＤＣコンバータの動作／停止を実現しても良い。
また本発明の赤外線受光に関する回路は一般にプリント回路基板上にＩＣ化された回路をパッケージ状態またはベアチップ状態で実装されるいわゆるモジュールとして供給されている。これを赤外線受光モジュールと呼んでいる。本発明での電源回路はこの赤外線受光モジュールにも適用できる。すなわち制御手段と赤外線受光手段とサブマイコン、メインマイコン等の制御手段と電圧検出手段と電荷蓄積手段を同一プリント基板上に配置することにより小スペースの赤外線受光モジュールを作製することができる。ただし各手段は他の回路との配置の都合上もあり、必要に応じて前記プリント基板上に配置されることが望ましい。
（実施例２）
図２は本発明の実施例２を示す電源回路図である。ＡＣ入力からスイッチ１０７を介してＡＣ−ＤＣコンバータ１０１が接続されその出力はメインマイコン１０２の正電源に供給される。またスイッチ１０８を介してＡＣ−ＤＣコンバータ１０９が接続されその出力はサブマイコン１０４と赤外線受光回路１０３と電荷蓄積手段１０６の正電源に供給される。電荷蓄積手段１０６は電圧検出手段１０５でモニターされ電圧検出手段１０５の出力はスイッチ１０８の開閉信号に利用される。赤外線受光回路１０３は外部から赤外線信号１１５を受けて出力１１０を出力し、その信号はメインマイコン１０２とサブマイコン１０４に入力される。サブマイコン１０４からは信号１１１がスイッチ１０７を閉じる為に出力される。また信号１１１は遅延回路１１２を経てメインマイコン１０２に入力される。メインマイコン１０２の出力信号１１３はサブマイコン１０４に入力されると同時に遅延回路１１４を介してスイッチ１０７を開く為に利用される。
【００１３】
次に図２の回路の動作を説明する。スイッチ１０７が開状態でＡＣ−ＤＣコンバータ１０１が停止しているとメインマイコン１０２は電源が供給されていない為停止している。電荷蓄積手段１０６が所定の電圧以下である場合は電圧検出手段１０５がスイッチ１０８を閉じるように信号を出す。これによりＡＣ−ＤＣコンバータ１０９が動作し電荷蓄積手段１０６が充電される。と同時に赤外線受光回路１０３とサブマイコン１０４にも電源が供給される為これら回路は動作状態にある。その後電荷蓄積手段が充電され所定の電圧まで上昇すると、電圧検出手段１０５の出力は反転しスイッチ１０８を開きＡＣ−ＤＣコンバータが停止する。しかしこの時赤外線受光回路１０３とサブマイコン１０４には電荷蓄積手段１０６から電源が供給されその動作を継続する。
【００１４】
今、リモコンから電源オンの命令コードに相当する赤外線信号１１５が赤外線受光回路１０３に入力されると赤外線受光回路１０３はサブマイコン１０４に信号１１０を出す。サブマイコン１０４は動作中である為信号１１１をスイッチ１０７に出しスイッチ１０７を閉じさせる。この時ＡＣ−ＤＣコンバータ１０１は動作を開始する。ＡＣ−ＤＣコンバータ１０１が発生する電圧でメインマイコン１０２が動作を開始できる状態になる。実際には信号１１１を遅延回路１１２によって遅延させた信号でメインマイコン１０２が動作を開始する。サブマイコン１０４は信号１１１を出した後その動作を停止して、消費電力を低減させるようにプログラムされていても良い。メインマイコン１０２が動作を開始するとその後の赤外線信号１１５は赤外線受光回路１０３で増幅、フィルタリングされ信号１１０としてメインマイコン１０２で処理されることになる。
【００１５】
次に、リモコンから電源オフの命令コードに相当する赤外線信号１１５が赤外線受光回路１０３に入力されると赤外線受光回路１０３はメインマイコン１０２に信号１１０を出す。メインマイコン１０２は信号１１３をサブマイコン１０４に出しサブマイコン１０４の動作を開始させる。と同時に信号１１３は遅延回路１１４により遅延させられスイッチ１０７を開くように働く。これによりＡＣ−ＤＣコンバータ１０１が停止してメインマイコン１０２の電源供給が断たれる為、その動作も停止し消費電力の低減が図られる。
【００１６】
本発明では常に電荷蓄積手段１０６から赤外線受光回路１０３とサブマイコン１０４に電源が供給されている為、ＡＣ−ＤＣコンバータ１０１，１０９が働いていない状態でも常に赤外線信号１１５を受信できる状態になっている。この状態では赤外線受光回路１０３とサブマイコン１０４と電圧検出手段１０５しか動作していない為、全体の消費電流を低くすることができる。通常メインマイコン１０２は１０ＭＨｚ程度のクロックで動作させる為５０ｍＡ程度の電流が必要であるが、これをサブマイコン１０４のみを動かすようにすれば１００μＡ程度の消費電流で済ませることができる。また赤外線受光回路と電圧検出手段１０５の合計消費電流も１００μＡ程度で済む。さらにＡＣ−ＤＣコンバータを１０１と１０９に分けた理由は、ＡＣ−ＤＣコンバータ１０１の負荷電流はメイン回路を動かす為数十Ａオーダであるが、ＡＣ−ＤＣコンバータ１０９の負荷電流は、赤外線受光回路１０３とサブマイコン１０４と電圧検出手段１０５だけであり数百μＡオーダの軽い負荷である。したがって負荷電流のオーダがあまりにも違う為、1つのＡＣ−ＤＣコンバータでこれを構成すると軽負荷時での効率が悪くなり、赤外線受光回路１０３とサブマイコン１０４と電圧検出手段１０５の消費電流だけでなくＡＣ−ＤＣコンバータでの消費電流が支配的になり低消費電流化を阻害する要因となる。本実施例ではこの理由によりＡＣ−ＤＣコンバータを2つ用意している。
【００１７】
また、ＡＣ−ＤＣコンバータ１０９が動作するときは電荷蓄積手段の電圧が所定の電圧以下になった時だけである。このようにＡＣ−ＤＣコンバータ１０９を間欠的に動作する為ことにより、ＡＣ−ＤＣコンバータ１０９での消費電力をさらに低減することができる。ここで、ＡＣ−ＤＣコンバータ１０９が動作する前記所定の電圧は電圧検出手段１０５により検知され、その電圧は赤外線受光回路１０３またはサブマイコン１０４の最低動作電圧付近の電圧である。一方、その後ＡＣ−ＤＣコンバータ１０９が動作を停止する時は、電荷蓄積手段の電圧が充電により上昇し、その電圧が赤外線受光回路またはサブマイコンの最高動作電圧付近になった時に、電圧検出手段１０５の出力が反転することによって検知される。すなわち電圧検出手段１０５にヒステリシスを持たせてこれを実現する。また、この電圧検出はサブマイコン１０４がＡ／Ｄコンバータを有していればサブマイコンにやらせても良い。
【００１８】
本発明ではＡＣ−ＤＣコンバータの動作を停止させる手段としてスイッチを用いたがＡＣ−ＤＣコンバータ自体にオン／オフ機能を持たせてＡＣ−ＤＣコンバータの動作／停止を実現しても良い。
【００１９】
【発明の効果】
本発明はＡＣ−ＤＣコンバータを常時動作させずに電荷蓄積手段たとえば2次電池や電気2重層コンデンサに電気を貯えてマイコン及び赤外線受光回路の電力を供給する。これによりＡＣ−ＤＣコンバータの動作頻度を減少させて最も電力効率の悪いＡＣ−ＤＣコンバータでの電力を低減することにより全体的な待機時消費電力の低減を実現するという効果がある。また本発明での電源回路を赤外線受光モジュールにも適用すれば、制御手段と赤外線受光手段とサブマイコン、メインマイコン等の制御手段と電圧検出手段と電荷蓄積手段を同一プリント基板上に配置することにより小スペースの赤外線受光モジュールを作製することができるという効果もある。
【図面の簡単な説明】
【図１】本発明による電源回路における実施例１の説明図である。
【図２】本発明による電源回路における実施例２の説明図である。
【図３】従来の電源回路の説明図である。
【符号の説明】
１０２、１０９ ＡＣ−ＤＣコンバータ
１０３ メインマイコン
１０４ 赤外線受光手段
１０５ サブマイコン
１０６ 電圧検出手段
１０７ 電荷蓄積手段
１１２、１１４ 遅延回路
１１６ ダイオード[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power supply circuit for household appliances having a remote control function. In particular, the standby current consumption of these household appliances is reduced.
[0002]
[Prior art]
As a power supply circuit for home appliances having a conventional remote control function, a power supply circuit using means for converting an AC voltage into a DC voltage (hereinafter referred to as an AC-DC converter) as shown in the circuit diagram of FIG. It was known. In other words, the control circuit for the remote control, here the microcomputer and the infrared light receiving circuit are driven by the output voltage of the AC-DC converter.
[0003]
[Problems to be solved by the invention]
In the circuit of FIG. 3, it is necessary to continue to supply power to the infrared light receiving circuit and the microcomputer in order to receive the remote control signal even when the image receiving is turned off in a home appliance such as a television. This is called standby power consumption. However, the efficiency of the AC-DC converter is poor and only about 1 W is consumed in this portion alone. In recent environmental problems, it is required to reduce the standby power consumption to the utmost limit, which cannot be realized with the current circuit configuration.
[0004]
[Means for Solving the Problems]
In order to solve such problems, electricity is stored in a charge storage means such as a secondary battery or an electric double layer capacitor without always operating the AC-DC converter, and power is supplied to the microcomputer and the infrared light receiving circuit. Before the voltage of these charge storage means falls below a predetermined value, specifically, below the minimum operating voltage of the microcomputer and the infrared light receiving circuit, the AC-DC converter is operated to charge the charge storage means. Specifically, charging is stopped before reaching the maximum operating voltage of the microcomputer and the infrared light receiving circuit. In this way, the overall standby power consumption can be reduced by reducing the operating frequency of the AC-DC converter and reducing the power in the AC-DC converter with the lowest power efficiency.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, power is supplied from the charge storage means to the infrared light receiving circuit and the microcomputer, voltage fluctuation of the charge storage means is detected by the voltage detection means, and the AC-DC converter is operated by the output signal.
[0006]
【Example】
(Example 1)
FIG. 1 is a power supply circuit diagram showing Embodiment 1 of the present invention. The AC-DC converter 101 is connected from the AC input via the switch 107, and the output is supplied to the positive power source of the main microcomputer 102. The output is supplied to the positive power source of the sub-microcomputer 104, the infrared light receiving circuit 103, and the charge storage means 106 via the diode 116. This positive power supply is monitored by the voltage detection means 105, and the output of the voltage detection means 105 is used as an open / close signal for the switch 107. The infrared light receiving circuit 103 receives an infrared signal 115 from the outside and outputs an output 110, which is input to the main microcomputer 102 and the sub-microcomputer 104. A signal 111 is used from the sub-microcomputer 104 to close the switch 107. The signal 111 is input to the main microcomputer 102 via the delay circuit 112. Output signals 113 and 117 of the main microcomputer 102 are input to the sub microcomputer 104. The sub-microcomputer 104 outputs a signal 118 that is used to open the switch 107.
[0007]
Next, the operation of the circuit of FIG. 1 will be described. When the switch 107 is open and the AC-DC converter 101 is stopped, the main microcomputer 102 is stopped because power is not supplied. When the charge storage means 106 is below a predetermined voltage, the voltage detection means 105 issues a signal to close the switch 107. As a result, the AC-DC converter 101 operates and the charge storage means 106 is charged. At the same time, since power is supplied to the infrared light receiving circuit 103 and the sub-microcomputer 104, these circuits are in an operating state. Thereafter, when the charge storage means 106 is charged and rises to a predetermined voltage, the output of the voltage detection means 105 is inverted, the switch 107 is opened, and the AC-DC converter is stopped. However, at this time, the infrared light receiving circuit 103 and the sub-microcomputer 104 are supplied with power from the charge storage means 106 and continue their operation.
[0008]
Now, when an infrared signal 115 corresponding to a power-on command code is input to the infrared light receiving circuit 103 from the remote controller, the infrared light receiving circuit 103 outputs a signal 110 to the sub-microcomputer 104. Since the sub-microcomputer 104 is operating, the signal 111 is output to the switch 107 and the switch 107 is closed. At this time, the AC-DC converter 101 starts operation. The main microcomputer 102 is ready to start operating with the voltage generated by the AC-DC converter 101. Actually, the main microcomputer 102 starts operating with a signal obtained by delaying the signal 111 by the delay circuit 112. This delay circuit is for releasing the reset of the main microcomputer 102 after the AC-DC converter 101 is activated and the output voltage rises sufficiently. Further, the main microcomputer 102 may output a signal 117 to the sub-microcomputer 104 after activation, and stop the operation of the sub-microcomputer 104 in the sense of reducing current consumption of the sub-microcomputer. In this case, since the main microcomputer 102 has started operating normally, the reliability of the power supply circuit is improved. However, if the consumption current of the sub-microcomputer 104 is negligibly small, the sub-microcomputer 104 does not have to be stopped. When the main microcomputer 102 starts operation, the infrared signal 115 thereafter is amplified and filtered by the infrared light receiving circuit 103 and processed as the signal 110 by the main microcomputer 102.
[0009]
Next, when an infrared signal 115 corresponding to a power-off command code is input to the infrared light receiving circuit 103 from the remote controller, the infrared light receiving circuit 103 outputs a signal 110 to the main microcomputer 102. The main microcomputer 102 outputs a signal 113 to the sub-microcomputer 104 to start the operation of the sub-microcomputer 104. When the sub-microcomputer 104 starts operating normally, the sub-microcomputer 104 sends a signal 118 to the switch 107 to open the switch 107. Since this method also results in the fact that the operation of the sub-microcomputer 104 is normal, the reliability of the power supply circuit is improved. Next, since the AC-DC converter 101 is stopped and the power supply to the main microcomputer 102 is cut off, the operation is also stopped and power consumption is reduced. The charge in the charge storage means 106 does not flow back to the main microcomputer 102 by the diode 116.
[0010]
In the present invention, since power is always supplied from the charge storage means 106 to the infrared light receiving circuit 103 and the sub-microcomputer 104, the infrared signal 115 can always be received even when the AC-DC converter 101 is not operating. In this state, since only the infrared light receiving circuit 103, the sub-microcomputer 104, and the voltage detection means 105 are operating, the overall current consumption can be reduced. Normally, the main microcomputer 102 is operated with a clock of about 10 MHz and requires a current of about 50 mA. However, if only the sub-microcomputer 104 is moved, a current consumption of about 100 μA can be achieved. Further, the total current consumption of the infrared light receiving circuit and the voltage detecting means 105 is only about 100 μA.
[0011]
Further, the AC-DC converter 101 operates only when the voltage of the charge storage means becomes a predetermined voltage or less. As described above, when the AC-DC converter 101 operates intermittently, power consumption in the AC-DC converter 101 can be further reduced. Here, the predetermined voltage at which the AC-DC converter 101 operates is detected by the voltage detecting means 105, and the voltage is a voltage near the minimum operating voltage of the infrared light receiving circuit 103 or the sub-microcomputer 104. On the other hand, when the AC-DC converter 101 stops operating thereafter, the voltage of the charge storage means 106 rises due to charging, and when the voltage reaches around the maximum operating voltage of the infrared light receiving circuit 103 or the sub-microcomputer 104, the voltage This is detected by inverting the output of the detection means 105. That is, this is realized by providing the voltage detecting means 105 with hysteresis. Further, this voltage detection may be performed by the sub-microcomputer if the sub-microcomputer 104 has an A / D converter.
[0012]
In the present invention, a switch is used as means for stopping the operation of the AC-DC converter. However, the AC-DC converter itself may have an on / off function to realize the operation / stop of the AC-DC converter.
The circuit related to infrared light reception according to the present invention is generally supplied as a so-called module in which a circuit formed as an IC on a printed circuit board is mounted in a package state or a bare chip state. This is called an infrared light receiving module. The power supply circuit in the present invention can also be applied to this infrared light receiving module. That is, by arranging the control means, the infrared light receiving means, the control means such as the sub microcomputer and the main microcomputer, the voltage detecting means, and the charge storage means on the same printed board, a small space infrared light receiving module can be manufactured. However, each means is preferably arranged on the printed circuit board as necessary for the convenience of arrangement with other circuits.
(Example 2)
FIG. 2 is a power supply circuit diagram showing Embodiment 2 of the present invention. The AC-DC converter 101 is connected from the AC input via the switch 107, and its output is supplied to the positive power source of the main microcomputer 102. An AC-DC converter 109 is connected via the switch 108 and its output is supplied to the positive power source of the sub-microcomputer 104, the infrared light receiving circuit 103, and the charge storage means 106. The charge storage means 106 is monitored by the voltage detection means 105, and the output of the voltage detection means 105 is used as an open / close signal for the switch 108. The infrared light receiving circuit 103 receives an infrared signal 115 from the outside and outputs an output 110, which is input to the main microcomputer 102 and the sub-microcomputer 104. A signal 111 is output from the sub-microcomputer 104 to close the switch 107. The signal 111 is input to the main microcomputer 102 via the delay circuit 112. The output signal 113 of the main microcomputer 102 is input to the sub microcomputer 104 and used to open the switch 107 via the delay circuit 114 at the same time.
[0013]
Next, the operation of the circuit of FIG. 2 will be described. When the switch 107 is open and the AC-DC converter 101 is stopped, the main microcomputer 102 is stopped because power is not supplied. If the charge storage means 106 is below a predetermined voltage, the voltage detection means 105 issues a signal to close the switch 108. As a result, the AC-DC converter 109 operates and the charge storage means 106 is charged. At the same time, since power is supplied to the infrared light receiving circuit 103 and the sub-microcomputer 104, these circuits are in an operating state. Thereafter, when the charge storage means is charged and rises to a predetermined voltage, the output of the voltage detection means 105 is inverted, the switch 108 is opened, and the AC-DC converter is stopped. However, at this time, the infrared light receiving circuit 103 and the sub-microcomputer 104 are supplied with power from the charge storage means 106 and continue their operation.
[0014]
Now, when an infrared signal 115 corresponding to a power-on command code is input to the infrared light receiving circuit 103 from the remote controller, the infrared light receiving circuit 103 outputs a signal 110 to the sub-microcomputer 104. Since the sub-microcomputer 104 is operating, the signal 111 is output to the switch 107 and the switch 107 is closed. At this time, the AC-DC converter 101 starts operation. The main microcomputer 102 is ready to start operating with the voltage generated by the AC-DC converter 101. Actually, the main microcomputer 102 starts operating with a signal obtained by delaying the signal 111 by the delay circuit 112. The sub-microcomputer 104 may be programmed to stop its operation after outputting the signal 111 to reduce power consumption. When the main microcomputer 102 starts operation, the infrared signal 115 thereafter is amplified and filtered by the infrared light receiving circuit 103 and processed as the signal 110 by the main microcomputer 102.
[0015]
Next, when an infrared signal 115 corresponding to a power-off command code is input to the infrared light receiving circuit 103 from the remote controller, the infrared light receiving circuit 103 outputs a signal 110 to the main microcomputer 102. The main microcomputer 102 outputs a signal 113 to the sub-microcomputer 104 to start the operation of the sub-microcomputer 104. At the same time, the signal 113 is delayed by the delay circuit 114 and operates to open the switch 107. As a result, the AC-DC converter 101 is stopped and the power supply to the main microcomputer 102 is cut off, so that the operation is also stopped and the power consumption is reduced.
[0016]
In the present invention, since power is always supplied from the charge storage means 106 to the infrared light receiving circuit 103 and the sub-microcomputer 104, the infrared signal 115 can always be received even when the AC-DC converters 101 and 109 are not operating. Yes. In this state, since only the infrared light receiving circuit 103, the sub-microcomputer 104, and the voltage detection means 105 are operating, the overall current consumption can be reduced. Normally, the main microcomputer 102 is operated with a clock of about 10 MHz and requires a current of about 50 mA. However, if only the sub-microcomputer 104 is moved, a current consumption of about 100 μA can be achieved. Further, the total current consumption of the infrared light receiving circuit and the voltage detecting means 105 is only about 100 μA. Further, the reason why the AC-DC converter is divided into 101 and 109 is that the load current of the AC-DC converter 101 is on the order of several tens of A because the main circuit is operated, but the load current of the AC-DC converter 109 is the infrared light receiving circuit. 103, the sub-microcomputer 104, and the voltage detection means 105, which are light loads on the order of several hundred μA. Therefore, the order of the load currents is so different that if this is constituted by one AC-DC converter, the efficiency at light load is deteriorated, and only the consumption current of the infrared light receiving circuit 103, the sub-microcomputer 104, and the voltage detecting means 105 is obtained. In other words, the current consumption in the AC-DC converter becomes dominant and becomes a factor that hinders the reduction in current consumption. In this embodiment, two AC-DC converters are prepared for this reason.
[0017]
Further, the AC-DC converter 109 operates only when the voltage of the charge storage means becomes a predetermined voltage or lower. Thus, by operating the AC-DC converter 109 intermittently, the power consumption in the AC-DC converter 109 can be further reduced. Here, the predetermined voltage at which the AC-DC converter 109 operates is detected by the voltage detecting means 105, and the voltage is a voltage near the minimum operating voltage of the infrared light receiving circuit 103 or the sub-microcomputer 104. On the other hand, when the AC-DC converter 109 stops operating thereafter, the voltage of the charge storage means rises due to charging, and when the voltage reaches the maximum operating voltage of the infrared light receiving circuit or sub-microcomputer, the voltage detection means 105 Is detected by reversing the output of. That is, this is realized by providing the voltage detecting means 105 with hysteresis. Further, this voltage detection may be performed by the sub-microcomputer if the sub-microcomputer 104 has an A / D converter.
[0018]
In the present invention, a switch is used as means for stopping the operation of the AC-DC converter. However, the AC-DC converter itself may have an on / off function to realize the operation / stop of the AC-DC converter.
[0019]
【The invention's effect】
The present invention supplies electricity to a charge storage means such as a secondary battery or an electric double layer capacitor without operating the AC-DC converter at all times, and supplies power to the microcomputer and the infrared light receiving circuit. As a result, the operation frequency of the AC-DC converter is reduced, and the power in the AC-DC converter having the lowest power efficiency is reduced, so that the overall standby power consumption can be reduced. If the power supply circuit according to the present invention is also applied to the infrared light receiving module, the control means, the infrared light receiving means, the sub microcomputer, the control means such as the main microcomputer, the voltage detecting means, and the charge storage means are arranged on the same printed circuit board. As a result, an infrared light receiving module having a small space can be produced.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a first embodiment of a power supply circuit according to the present invention.
FIG. 2 is an explanatory diagram of a second embodiment of the power supply circuit according to the present invention.
FIG. 3 is an explanatory diagram of a conventional power supply circuit.
[Explanation of symbols]
102, 109 AC-DC converter 103 Main microcomputer 104 Infrared light receiving means 105 Sub microcomputer 106 Voltage detection means 107 Charge storage means 112, 114 Delay circuit 116 Diode

Claims (7)

交流電圧を直流に変換する第１のＡＣ−ＤＣ変換手段に接続され、赤外線受光素子から発せられるリモコン信号をデコードするメインマイコンである第１制御回路と、
前記第１のＡＣ−ＤＣ変換手段に接続され、少なくとも電気機器の電源のオン・オフに関するリモコン信号をデコードし、前記第１の制御回路より消費電流の少ないサブマイコンである第２の制御回路で構成され、
前記赤外線受光素子が第１の信号を受信し、前記第１の信号を前記第２の制御回路に出力すると、前記第２の制御回路は、前記第１の制御回路の動作を開始させ、その後前記第２の制御回路自身を停止させ、前記赤外線受光素子が第２の信号を受信し、前記第２の信号を前記第１の制御回路に出力すると、前記第１の制御回路は前記第２の制御回路の動作を開始させた後、前記第１の制御回路自身の動作を停止することを特徴とする電源回路。A first control circuit which is connected to a first AC-DC converting means for converting an alternating voltage into a direct current and which is a main microcomputer for decoding a remote control signal emitted from an infrared light receiving element;
A second control circuit which is connected to the first AC-DC converting means , decodes at least a remote control signal relating to power on / off of the electric device, and is a sub-microcomputer that consumes less current than the first control circuit; Configured,
When the infrared light receiving element receives the first signal and outputs the first signal to the second control circuit, the second control circuit starts the operation of the first control circuit, and then When the second control circuit itself is stopped, the infrared light receiving element receives a second signal, and outputs the second signal to the first control circuit, the first control circuit causes the second control circuit to A power supply circuit characterized by stopping the operation of the first control circuit itself after starting the operation of the control circuit. 前記電源回路は、さらにThe power supply circuit further includes
電荷蓄積手段と、Charge storage means;
前記電荷蓄積手段の電圧をモニタする電圧検出手段と、を備え、Voltage detection means for monitoring the voltage of the charge storage means,
前記第２の制御回路は、前記第１の制御回路が動作を停止しているときに、前記第１のＡＣ−ＤＣ変換手段の動作を停止させることを特徴とする請求項１記載の電源回路。2. The power supply circuit according to claim 1, wherein the second control circuit stops the operation of the first AC-DC converting means when the first control circuit stops the operation. . 前記電圧検出手段は、前記第２の制御回路によって前記第１のＡＣ−ＤＣ変換手段の動作が停止しているときに、The voltage detection unit is configured such that when the operation of the first AC-DC conversion unit is stopped by the second control circuit,
前記電荷蓄積手段の電圧が所定の電圧値以下に下がった時、前記ＡＣ−ＤＣ変換手段の動作を開始し、When the voltage of the charge storage unit falls below a predetermined voltage value, the operation of the AC-DC conversion unit is started,
前記電荷蓄積手段の電圧が所定の電圧値以上に上がった時、前記ＡＣ−ＤＣ変換手段の動作を停止する請求項２記載の電源回路。3. The power supply circuit according to claim 2, wherein when the voltage of the charge storage means rises to a predetermined voltage value or more, the operation of the AC-DC conversion means is stopped. 前記電源回路は、さらにThe power supply circuit further includes
前記第２の制御回路と前記第１の制御回路の間に遅延回路を備え、A delay circuit is provided between the second control circuit and the first control circuit;
前記第２の制御回路が出力する前記第１の制御回路の動作を開始するための信号に遅延時間を設けたことを特徴とする請求項１から３のいずれか記載の電源回路。4. The power supply circuit according to claim 1, wherein a delay time is provided in a signal for starting the operation of the first control circuit output from the second control circuit. 前記第２の制御回路と前記赤外線受光素子とを同一基板上に配置した請求項１から４のいずれか記載の電源回路。 5. The power supply circuit according to claim 1, wherein the second control circuit and the infrared light receiving element are arranged on the same substrate . 前記第２の制御回路と前記赤外線受光素子と電荷蓄積手段と電圧検出手段とを同一基板上に配置した請求項１から４のいずれか記載の電源回路。 5. The power supply circuit according to claim 1, wherein the second control circuit, the infrared light receiving element, the charge storage unit, and the voltage detection unit are disposed on the same substrate . 前記電圧検出手段と前記第２の制御回路と前記赤外線受光素子は、前記電荷蓄積手段から電源供給されている請求項１から６のいずれか記載の電源回路。The power supply circuit according to any one of claims 1 to 6, wherein the voltage detection means, the second control circuit, and the infrared light receiving element are supplied with power from the charge storage means .
JP2001088700A 1998-12-16 2001-03-26 Power circuit Expired - Fee Related JP4350316B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US09/465,079 US6525666B1 (en) 1998-12-16 1999-12-16 Power circuit
JP2001088700A JP4350316B2 (en) 1999-12-16 2001-03-26 Power circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/465,079 US6525666B1 (en) 1998-12-16 1999-12-16 Power circuit
JP2001088700A JP4350316B2 (en) 1999-12-16 2001-03-26 Power circuit

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP35803298A Division JP3188875B2 (en) 1998-12-16 1998-12-16 Power supply circuit

Publications (2)

Publication Number Publication Date
JP2002027565A JP2002027565A (en) 2002-01-25
JP4350316B2 true JP4350316B2 (en) 2009-10-21

Family

ID=26612110

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001088700A Expired - Fee Related JP4350316B2 (en) 1998-12-16 2001-03-26 Power circuit

Country Status (1)

Country Link
JP (1) JP4350316B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007304909A (en) * 2006-05-12 2007-11-22 Mitsubishi Electric Corp Electrical apparatus
JP2015171289A (en) * 2014-03-10 2015-09-28 コニカミノルタ株式会社 Power supply controller
JP7426621B2 (en) * 2020-02-26 2024-02-02 パナソニックＩｐマネジメント株式会社 Power supply unit and power supply system

Also Published As

Publication number Publication date
JP2002027565A (en) 2002-01-25

Similar Documents

Publication Publication Date Title
JP4491018B2 (en) Power supply control device with zero standby power
US7508248B2 (en) Electronic device
US7856566B2 (en) Standby arrangement for power supplies
US7301248B2 (en) Control method for voltage boosting circuit
JP3188875B2 (en) Power supply circuit
JP2002333925A (en) Stand-by circuit for electric device
US20120307530A1 (en) Power supply device and method for controlling same
JP2001145355A (en) Stand-by power reducing circuit for electric equipment
TW201044757A (en) Energy-efficient standby mode in a switching power supply
JP2007143397A (en) Power supply control method and current-voltage converting circuit and electronic equipment
US6525666B1 (en) Power circuit
WO2007063788A1 (en) Switching power supply device and method for starting same
JP4350316B2 (en) Power circuit
EP2720356B1 (en) Power supply system and power control circuit thereof
JP2001224169A (en) Semiconductor device for switching power source
US8493015B2 (en) Door drive
JP2001333546A (en) Power supply unit
JP2004274897A (en) Standby power saving power supply device
CN109884942B (en) Control system of electric appliance and electric appliance
TW202209799A (en) Power supply with reduced power consumption and related electronic system
CN113949038A (en) Driving device and driving method of reclosing device
US8199543B2 (en) Power converter with extremely low standby power consumption
JP2000217161A (en) Standby power supply device for remote controller
JPH11341397A (en) Remote controller standby power supply unit
JP6362794B2 (en) Inverter

Legal Events

Date Code Title Description
RD01 Notification of change of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7421

Effective date: 20040510

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20040511

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20051129

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080916

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20081001

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20081128

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20090721

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090722

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120731

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130731

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313117

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

LAPS Cancellation because of no payment of annual fees