公开(公告)号：US20110122165A1

公开(公告)日：2011-05-26

申请号：US12817993

申请日：2010-06-17

申请人： Osamu Sengoku

发明人： Osamu Sengoku

IPC分类号： G09G5/10 ,  H05B41/36

CPC分类号： G09G3/342 ,  G09G2310/024 ,  H05B41/282

摘要： A lamp driving circuit is provided for controlling individual block luminances provided by corresponding locally dimmed blocks of a backlight unit of an LCD system where the backlight unit employs high voltage discharge lamps that each need to have an AC excitation signal of at least predetermined minimum high voltage level developed there across in order to generate light. The lamp driving circuit includes a plurality of isolation transformers and corresponding low voltage switch circuits. Each isolation transformer has primary windings and a secondary winding. The secondary winding is interposed between a high voltage AC power source and a corresponding one or more lamps. The equivalent circuit impedance of the secondary winding determines what voltage will develop across its respective lamps. The low voltage switch circuits are operative to alter the equivalent circuit impedances of their respective primary windings, which impedance changes are then reflected by mutual inductance coupling into the secondary windings. Thus control circuits operating at relatively low voltages can be used to control the ON/OFF states of the lamps.

摘要翻译： 提供一种灯驱动电路，用于控制由LCD系统的背光单元的相应局部调暗块提供的各个块亮度，其中背光单元采用高压放电灯，每个需要具有至少预定的最小高电压的AC激励信号 为了产生光，开发了这个级别。 灯驱动电路包括多个隔离变压器和相应的低压开关电路。 每个隔离变压器都有初级绕组和次级绕组。 次级绕组插入在高压AC电源和相应的一个或多个灯之间。 次级绕组的等效电路阻抗决定了在其各自的灯上会产生什么电压。 低压开关电路可操作以改变它们各自的初级绕组的等效电路阻抗，该阻抗变化然后通过互感耦合反射到次级绕组中。 因此，可以使用在较低电压下操作的控制电路来控制灯的ON / OFF状态。

公开(公告)号：US07723996B2

公开(公告)日：2010-05-25

申请号：US11864616

申请日：2007-09-28

申请人： Yun-Gun Lee ,  Jin-Won Jang ,  Tatsuhisa Shimura ,  Osamu Sengoku

发明人： Yun-Gun Lee ,  Jin-Won Jang ,  Tatsuhisa Shimura ,  Osamu Sengoku

IPC分类号： G01R31/02

CPC分类号： H05B41/2822 ,  H05B41/2855

摘要： An inverter circuit includes plural pairs of third coils, in which adjacent third coils are serially connected to each other so as to offset AC voltage generated from the paired third coils, one end of the paired third coils being connected to ground. Input terminals of plural diodes are connected to one end of the paired third coils so as to generate the voltage detection value by detecting voltage generated from the paired third coils. A fault detector compares the voltage detection value generated from the diodes with a predetermined threshold value to detect a fault and generates the comparison result.

摘要翻译： 逆变器电路包括多对第三线圈，其中相邻的第三线圈彼此串联连接以便偏移从成对的第三线圈产生的AC电压，所述成对的第三线圈的一端连接到地。 多个二极管的输入端子连接到成对的第三线圈的一端，以便通过检测从成对的第三线圈产生的电压来产生电压检测值。 故障检测器将从二极管产生的电压检测值与预定阈值进行比较，以检测故障并产生比较结果。

公开(公告)号：US20090261755A1

公开(公告)日：2009-10-22

申请号：US12262396

申请日：2008-10-31

申请人： Min-Soo CHOI ,  Osamu SENGOKU ,  Tatsuhisa SHIMURA

发明人： Min-Soo CHOI ,  Osamu SENGOKU ,  Tatsuhisa SHIMURA

IPC分类号： H05B37/02

CPC分类号： H05B41/282 ,  H05B41/2855 ,  Y02B20/183

摘要： An inverter circuit for a backlight device includes an inverter transformer which supplies a high AC voltage to a plurality of discharge tubes, a filter circuit connected to an output terminal of the inverter transformer, and an abnormal discharge detection circuit. The filter circuit passes a current signal having a high frequency component of the high AC voltage to the abnormal discharge detection circuit, and the abnormal discharge detection circuit detects an abnormal discharge current based on the current signal.

摘要翻译： 用于背光装置的逆变器电路包括向多个放电管提供高AC电压的逆变器变压器，连接到逆变器变压器的输出端子的滤波器电路和异常放电检测电路。 滤波器电路将具有高交流电压的高频分量的电流信号传送到异常放电检测电路，异常放电检测电路根据电流信号检测异常放电电流。

公开(公告)号：US07477023B2

公开(公告)日：2009-01-13

申请号：US11851743

申请日：2007-09-07

申请人： Tatsuhisa Shimura ,  Osamu Sengoku

发明人： Tatsuhisa Shimura ,  Osamu Sengoku

IPC分类号： H05B41/16

CPC分类号： H05B41/2822

摘要： An inverter circuit includes a power supply which outputs an alternating current voltage, an inverter transformer having one primary coil connected to an output terminal of the power supply and pairs of secondary coils which supply an alternating current high voltage, induced by the one primary coil, to pairs of discharge tubes and a plurality of balance transformers having primary coils serially connected between respective pairs of the pairs of secondary coils of the inverter transformer, and having secondary coils corresponding to the primary coils of the plurality of balance transformers, wherein the secondary coils of the plurality of balance transformers are serially connected to form a loop.

摘要翻译： 逆变器电路包括输出交流电压的电源，具有连接到电源的输出端的一个初级线圈的逆变器变压器和由一个初级线圈感应的提供交流高压的次级线圈对， 成对放电管和多个平衡变压器，其具有串联连接在逆变器变压器的各对次级线圈对之间的初级线圈，并且具有对应于多个平衡变压器的初级线圈的次级线圈，其中次级线圈 多个平衡变压器串联连接形成回路。

公开(公告)号：US07402957B2

公开(公告)日：2008-07-22

申请号：US11521884

申请日：2006-09-15

申请人： Tatsuhisa Shimura ,  Takashi Kinoshita ,  Osamu Sengoku

发明人： Tatsuhisa Shimura ,  Takashi Kinoshita ,  Osamu Sengoku

IPC分类号： H05B37/00

CPC分类号： H05B41/2822

摘要： In an inverter circuit, inverter transformers supply AC voltage to discharge tubes. The inverter transformers are arranged such that the AC voltage at a respective first terminal of each secondary coil has an opposite polarity with respect to a corresponding second terminal of each secondary coil. Balance transformers have primary coils inserted in series between a reference terminal of the secondary coils of the inverter transformers and ground. The secondary coils of the balance transformers are connected in series to form a loop. One node of the loop is grounded and a voltage detection node is located on the loop. At least one secondary coil of the secondary coils of the balance transformers is interposed between the grounded node of the loop and the voltage detection node. Thus, an abnormal state or condition, such as an open circuit or a short circuit may be detected.

摘要翻译： 在逆变电路中，逆变变压器为交流电压提供放电管。 逆变器变压器被布置成使得每个次级线圈的相应的第一端子处的AC电压相对于每个次级线圈的对应的第二端子具有相反的极性。 平衡变压器具有串联插入在逆变器变压器的次级线圈的参考端和地之间的初级线圈。 平衡变压器的次级线圈串联连接形成一个回路。 回路的一个节点接地，电压检测节点位于回路上。 平衡变压器的次级线圈的至少一个次级线圈插入在环路的接地节点和电压检测节点之间。 因此，可以检测到诸如开路或短路的异常状态或状况。

公开(公告)号：US20070109817A1

公开(公告)日：2007-05-17

申请号：US11450770

申请日：2006-06-09

申请人： Tatsuhisa Shimura ,  Takashi Kinoshita ,  Osamu Sengoku

发明人： Tatsuhisa Shimura ,  Takashi Kinoshita ,  Osamu Sengoku

IPC分类号： H02M3/335

CPC分类号： H02M7/538 ,  H02M1/08 ,  H03K17/691 ,  H05B41/2828

摘要： An inverter circuit includes a first driving transformer, a second driving transformer, a power voltage circuit, a high-side FET connected to a secondary winding of the first driving transformer, a low-side FET connected to a secondary winding of the second driving transformer and an inverter transformer connected to a driving node between the high-side FET and the low-side FET. Thus, a direct current path does not exist between a gate of the high-side FET and the driving node, so that a gate voltage of the high-side FET is biased more to a negative polarity.

摘要翻译： 逆变器电路包括第一驱动变压器，第二驱动变压器，电源电压电路，连接到第一驱动变压器的次级绕组的高侧FET，连接到第二驱动变压器的次级绕组的低侧FET 以及连接到高侧FET和低侧FET之间的驱动节点的逆变器变压器。 因此，在高侧FET的栅极和驱动节点之间不存在直流路径，使得高侧FET的栅极电压被更多地偏置为负极性。

公开(公告)号：US20070108917A1

公开(公告)日：2007-05-17

申请号：US11501415

申请日：2006-08-09

申请人： Osamu Sengoku ,  Takashi Kinoshita ,  Tatsuhisa Shimura

发明人： Osamu Sengoku ,  Takashi Kinoshita ,  Tatsuhisa Shimura

IPC分类号： H05B41/24

CPC分类号： H05B41/282 ,  Y02B20/183

摘要： An inverter circuit includes an inverter transformer to supply AC high voltages of opposite phases, and a plurality of balance transformers. The inverter transformer supplies AC high voltages of same phases to every n number of CCFLs, and the CCFLs are connected in series to primary windings of the balance transformers at every two CCFLs. Also, secondary windings of the balance transformers are connected in series to form a closed loop. Thus, an inverter circuit may realized for a large-sized backlight without increasing a number of the balance transformers.

摘要翻译： 逆变器电路包括用于提供相反相位的交流高电压的逆变器变压器和多个平衡变压器。 逆变器变压器为每n个CCFL提供相同相位的交流高电压，并且CCFL每隔两个CCFL串联连接到天平变压器的初级绕组。 而且，平衡变压器的次级绕组串联连接以形成闭环。 因此，在不增加多个平衡变压器的情况下，可以实现用于大尺寸背光的逆变器电路。

公开(公告)号：US20080079440A1

公开(公告)日：2008-04-03

申请号：US11864616

申请日：2007-09-28

申请人： Yun-Gun LEE ,  Jin-Won Jang ,  Tatsuhisa Shimura ,  Osamu Sengoku

发明人： Yun-Gun LEE ,  Jin-Won Jang ,  Tatsuhisa Shimura ,  Osamu Sengoku

IPC分类号： G01R31/00 ,  H01F27/28

CPC分类号： H05B41/2822 ,  H05B41/2855

摘要： An inverter circuit includes plural pairs of third coils, in which adjacent third coils are serially connected to each other so as to offset AC voltage generated from the paired third coils, one end of the paired third coils being connected to ground. Input terminals of plural diodes are connected to one end of the paired third coils so as to generate the voltage detection value by detecting voltage generated from the paired third coils. A fault detector compares the voltage detection value generated from the diodes with a predetermined threshold value to detect a fault and generates the comparison result.

摘要翻译： 逆变器电路包括多对第三线圈，其中相邻的第三线圈彼此串联连接以便偏移从成对的第三线圈产生的AC电压，所述成对的第三线圈的一端连接到地。 多个二极管的输入端子连接到成对的第三线圈的一端，以便通过检测从成对的第三线圈产生的电压来产生电压检测值。 故障检测器将从二极管产生的电压检测值与预定阈值进行比较，以检测故障并产生比较结果。

公开(公告)号：US20070108918A1

公开(公告)日：2007-05-17

申请号：US11520913

申请日：2006-09-14

申请人： Osamu Sengoku ,  Takashi Kinoshita ,  Tatsuhisa Shimura

发明人： Osamu Sengoku ,  Takashi Kinoshita ,  Tatsuhisa Shimura

IPC分类号： H05B41/24

CPC分类号： H05B41/2822

摘要： A backlight assembly prevents abnormal discharge of a device using a high voltage to drive a discharge tube such as CCFL. An inverter circuit includes an inverter transformer supplying an AC high voltage to a plurality of discharge tubes, and a plurality of balance transformers. First terminals of primary coils of the balance transformers are connected to the discharge tubes, and second terminals of the primary coils are connected to a ground. Secondary coils of the balance transformers are connected in series to form a loop. A resistor has a first terminal connected to the loop and a second terminal connected to the ground. Accordingly, the backlight assembly may detect a high-voltage abnormal discharge such as a corona discharge, an arc discharge or the like.

摘要翻译： 背光组件防止使用高电压的装置的异常放电以驱动诸如CCFL的放电管。 逆变器电路包括向多个放电管提供交流高电压的逆变器变压器和多个平衡变压器。 平衡变压器的初级线圈的第一端子连接到放电管，并且初级线圈的第二端子连接到地。 平衡变压器的二次线圈串联连接形成回路。 电阻器具有连接到环路的第一端子和连接到地的第二端子。 因此，背光组件可以检测诸如电晕放电，电弧放电等的高电压异常放电。

公开(公告)号：US07746337B2

公开(公告)日：2010-06-29

申请号：US11450770

申请日：2006-06-09

申请人： Tatsuhisa Shimura ,  Takashi Kinoshita ,  Osamu Sengoku

发明人： Tatsuhisa Shimura ,  Takashi Kinoshita ,  Osamu Sengoku

IPC分类号： G09G5/00

CPC分类号： H02M7/538 ,  H02M1/08 ,  H03K17/691 ,  H05B41/2828

摘要： An inverter circuit includes a first driving transformer, a second driving transformer, a power voltage circuit, a high-side FET connected to a secondary winding of the first driving transformer, a low-side FET connected to a secondary winding of the second driving transformer and an inverter transformer connected to a driving node between the high-side FET and the low-side FET. Thus, a direct current path does not exist between a gate of the high-side FET and the driving node, so that a gate voltage of the high-side FET is biased more to a negative polarity.

摘要翻译： 逆变器电路包括第一驱动变压器，第二驱动变压器，电源电压电路，连接到第一驱动变压器的次级绕组的高侧FET，连接到第二驱动变压器的次级绕组的低侧FET 以及连接到高侧FET和低侧FET之间的驱动节点的逆变器变压器。 因此，在高侧FET的栅极和驱动节点之间不存在直流路径，使得高侧FET的栅极电压被更多地偏置为负极性。