JP4514118B2 - 圧電トランス駆動回路及びそれを備えた冷陰極管点灯装置 - Google Patents
圧電トランス駆動回路及びそれを備えた冷陰極管点灯装置 Download PDFInfo
- Publication number
- JP4514118B2 JP4514118B2 JP2004235720A JP2004235720A JP4514118B2 JP 4514118 B2 JP4514118 B2 JP 4514118B2 JP 2004235720 A JP2004235720 A JP 2004235720A JP 2004235720 A JP2004235720 A JP 2004235720A JP 4514118 B2 JP4514118 B2 JP 4514118B2
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- Prior art keywords
- voltage
- piezoelectric transformer
- circuit
- output
- cathode tube
- 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.)
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- 238000001514 detection method Methods 0.000 claims description 32
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Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
- H05B41/2822—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Inverter Devices (AREA)
Description
10 抵抗
11 差動オペアンプ
12 可変電流源
13 スイッチ手段
14 コンデンサ
15 定電流源
VREF1 誤差基準電圧
51 冷陰極管点灯装置
55 圧電トランス駆動回路
56 圧電トランス
56a、56b 圧電トランスの1次電極
56c 圧電トランスの2次電極
57 冷陰極管(負荷)
58 インピーダンス素子
61 検波回路(CDET)
62 誤差増幅回路
63 電圧制御発振器(VCO)
Claims (2)
- 1対の1次電極に間欠的に印加される交流の電圧を昇圧して2次電極から出力する圧電トランスを駆動するものであって、
2次電極に接続される負荷の状態を示す信号を検波してそのピーク電圧又は平均電圧を出力する検波回路と、
検波回路の出力電圧と誤差基準電圧とを比較し、その差に応じた電圧を出力する誤差増幅回路と、
誤差増幅回路の出力電圧により制御され、前記1次電極の交流の周波数を決定するクロックを生成する電圧制御発振器と、
を備えた圧電トランス駆動回路において、
前記誤差増幅回路は、間欠動作の印加動作停止後に印加動作が開始されるとき、常に、前記交流の周波数が高い点から徐々に低くなって安定するように電圧制御発振器を制御するものであって、一の入力端子に抵抗を介して検波回路の出力電圧、他の入力端子に前記誤差基準電圧を入力してそれらを比較し、差電圧を増幅して出力する差動オペアンプと、差動オペアンプにより制御される可変電流源と、電源電圧と接地電位の間に可変電流源と直列に接続された定電流源及びスイッチ手段と、両端が可変電流源の出力と差動オペアンプの一の入力端子に接続されたコンデンサと、を備えてなり、
前記スイッチ手段は間欠動作の印加動作停止時には非導通状態、印加動作時には導通状態となり、前記誤差基準電圧は間欠動作の印加動作停止時には第1の値、印加動作が開始されると徐々に第2の値に遷移することを特徴とする圧電トランス駆動回路。 - 請求項1に記載された圧電トランス駆動回路と、
1対の1次電極に印加される交流の電圧を昇圧して2次電極から出力するよう圧電トランス駆動回路により駆動される圧電トランスと、
圧電トランスの2次電極に負荷として接続された冷陰極管と、
圧電トランス駆動回路の検波回路が2次電極に接続される負荷の状態を示す信号の検波を行うために冷陰極管と直列に接続されたインピーダンス素子と、
を備えてなることを特徴とする冷陰極管点灯装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004235720A JP4514118B2 (ja) | 2004-08-13 | 2004-08-13 | 圧電トランス駆動回路及びそれを備えた冷陰極管点灯装置 |
PCT/JP2005/014723 WO2006016640A1 (ja) | 2004-08-13 | 2005-08-11 | 圧電トランス駆動回路及びそれを備えた冷陰極管点灯装置 |
US10/599,389 US7501738B2 (en) | 2004-08-13 | 2005-08-11 | Piezoelectric transducer drive circuit and cold cathode tube lighting device having the same |
CNA2005800199194A CN1969449A (zh) | 2004-08-13 | 2005-08-11 | 压电变压器驱动电路以及具有该电路的冷阴极管点亮装置 |
TW094127589A TW200612652A (en) | 2004-08-13 | 2005-08-12 | Drive circuit of piezoelectric transformer and cold-cathode tube lighting device equipped with it |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004235720A JP4514118B2 (ja) | 2004-08-13 | 2004-08-13 | 圧電トランス駆動回路及びそれを備えた冷陰極管点灯装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006054130A JP2006054130A (ja) | 2006-02-23 |
JP4514118B2 true JP4514118B2 (ja) | 2010-07-28 |
Family
ID=35839400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004235720A Expired - Fee Related JP4514118B2 (ja) | 2004-08-13 | 2004-08-13 | 圧電トランス駆動回路及びそれを備えた冷陰極管点灯装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7501738B2 (ja) |
JP (1) | JP4514118B2 (ja) |
CN (1) | CN1969449A (ja) |
TW (1) | TW200612652A (ja) |
WO (1) | WO2006016640A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7656600B2 (en) * | 2006-08-25 | 2010-02-02 | Seagate Technology Llc | Monitoring transducer potential to detect an operating condition |
JP5559456B2 (ja) * | 2007-08-01 | 2014-07-23 | 三星電子株式会社 | 圧電トランス方式高圧電源装置および画像形成装置 |
CN104753479B (zh) * | 2015-03-09 | 2017-12-26 | 上海东软载波微电子有限公司 | 射频功率放大器电路及射频发射机 |
CN105072753A (zh) * | 2015-08-05 | 2015-11-18 | 嘿灯(深圳)智能科技有限公司 | 一种串行led调光电路 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11299248A (ja) * | 1998-04-10 | 1999-10-29 | Toko Inc | インバータ回路 |
JP2002186252A (ja) * | 2000-12-13 | 2002-06-28 | Toko Inc | 圧電トランスの制御回路 |
JP2003324962A (ja) * | 2002-04-26 | 2003-11-14 | Toko Inc | 圧電トランス駆動回路 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2778554B2 (ja) | 1995-10-12 | 1998-07-23 | 日本電気株式会社 | 圧電トランス駆動回路 |
-
2004
- 2004-08-13 JP JP2004235720A patent/JP4514118B2/ja not_active Expired - Fee Related
-
2005
- 2005-08-11 CN CNA2005800199194A patent/CN1969449A/zh active Pending
- 2005-08-11 WO PCT/JP2005/014723 patent/WO2006016640A1/ja active Application Filing
- 2005-08-11 US US10/599,389 patent/US7501738B2/en not_active Expired - Fee Related
- 2005-08-12 TW TW094127589A patent/TW200612652A/zh unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11299248A (ja) * | 1998-04-10 | 1999-10-29 | Toko Inc | インバータ回路 |
JP2002186252A (ja) * | 2000-12-13 | 2002-06-28 | Toko Inc | 圧電トランスの制御回路 |
JP2003324962A (ja) * | 2002-04-26 | 2003-11-14 | Toko Inc | 圧電トランス駆動回路 |
Also Published As
Publication number | Publication date |
---|---|
WO2006016640A1 (ja) | 2006-02-16 |
US20070182282A1 (en) | 2007-08-09 |
CN1969449A (zh) | 2007-05-23 |
JP2006054130A (ja) | 2006-02-23 |
US7501738B2 (en) | 2009-03-10 |
TW200612652A (en) | 2006-04-16 |
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