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1. 发明授权

US06433458B1 Method and unit for driving piezoelectric transformer used for controlling luminance of cold-cathode tube 有权
公开(公告)号：US06433458B1
公开(公告)日：2002-08-13
申请号：US09834820
申请日：2001-04-13
申请人： Hiroshi Nakatsuka , Katsunori Moritoki , Toshiyuki Asahi , Kojiro Okuyama , Osamu Kawasaki
发明人： Hiroshi Nakatsuka , Katsunori Moritoki , Toshiyuki Asahi , Kojiro Okuyama , Osamu Kawasaki
IPC分类号： H01L4108
摘要： A method and unit for driving a small high-efficiency piezoelectric transformer allowing a cold-cathode tube to have stable luminance by detecting only an active current flowing in the cold-cathode tube based on a phase difference between an output current and voltage of the piezoelectric transformer, removing a reactive current caused by stray capacitance formed between the cold-cathode tube and a reflector, and accurately controlling driving of the piezoelectric transformer so that a constant active current is detected.

2. 发明授权

US06794796B2 Piezoelectric transformer, piezoelectric transformer drive circuit, piezoelectric transformer drive method and cold cathode tube drive apparatus using piezoelectric transformer 失效
标题翻译：压电变压器，压电变压器驱动电路，压电变压器驱动方法和使用压电变压器的冷阴极管驱动装置
公开(公告)号：US06794796B2
公开(公告)日：2004-09-21
申请号：US10338754
申请日：2003-01-09
申请人： Hiroshi Nakatsuka , Katsunori Moritoki , Toshiyuki Asahi , Kojiro Okuyama , Osamu Kawasaki
发明人： Hiroshi Nakatsuka , Katsunori Moritoki , Toshiyuki Asahi , Kojiro Okuyama , Osamu Kawasaki
IPC分类号： H01L4108
CPC分类号： H01L41/107 , H01L41/044 , H05B41/2822 , H05B41/2855 , H05B41/3925
摘要： The piezoelectric transformer of the present invention has a piezoelectric element 109 mainly formed of a piezoelectric material, primary electrodes 101U and 101D which are formed on the piezoelectric element 109 and to which a voltage is applied, a secondary electrode 102 which is formed on the piezoelectric element 109 and from which a voltage higher than the voltage applied to the primary electrode is output, and a sensor electrode 103 which is formed on the piezoelectric element 109 and from which a voltage lower than the output voltage of the secondary electrode is output.
摘要翻译：本发明的压电变压器具有主要由压电材料形成的压电元件109，形成在压电元件109上并施加有电压的初级电极101U和101D，形成在压电元件上的二次电极102 输出比施加到初级电极的电压高的电压，并且形成在压电元件109上并且从其输出低于次级电极的输出电压的电压的传感器电极103。

3. 发明授权

US06737816B2 Piezoelectric transformer, piezoelectric transformer drive circuit, piezoelectric transformer drive method and cold cathode tube drive apparatus using piezoelectric transformer 失效
公开(公告)号：US06737816B2
公开(公告)日：2004-05-18
申请号：US09852621
申请日：2001-05-11
申请人： Hiroshi Nakatsuka , Katsunori Moritoki , Toshiyuki Asahi , Kojiro Okuyama , Osamu Kawasaki
发明人： Hiroshi Nakatsuka , Katsunori Moritoki , Toshiyuki Asahi , Kojiro Okuyama , Osamu Kawasaki
IPC分类号： G05F100
CPC分类号： H01L41/107 , H01L41/044 , H05B41/2822 , H05B41/2855 , H05B41/3925
摘要： The piezoelectric transformer of the present invention has a piezoelectric element 109 mainly formed of a piezoelectric material, primary electrodes 101U and 101D which are formed on the piezoelectric element 109 and to which a voltage is applied, a secondary electrode 102 which is formed on the piezoelectric element 109 and from which a voltage higher than the voltage applied to the primary electrode is output, and a sensor electrode 103 which is formed on the piezoelectric element 109 and from which a voltage lower than the output voltage of the secondary electrode is output.

4. 发明授权

US06583534B1 Piezoelectric transformer, piezoelectric transformer drive circuit, piezoelectric transformer drive method and cold cathode tube drive apparatus using piezoelectric transformer 失效
公开(公告)号：US06583534B1
公开(公告)日：2003-06-24
申请号：US09588079
申请日：2000-06-05
申请人： Hiroshi Nakatsuka , Katsunori Moritoki , Toshiyuki Asahi , Kojiro Okuyama , Osamu Kawasaki
发明人： Hiroshi Nakatsuka , Katsunori Moritoki , Toshiyuki Asahi , Kojiro Okuyama , Osamu Kawasaki
IPC分类号： H01L4108
CPC分类号： H01L41/107 , H01L41/044 , H05B41/2822 , H05B41/2855 , H05B41/3925
摘要： The piezoelectric transformer of the present invention has a piezoelectric element 109 mainly formed of a piezoelectric material, primary electrodes 101U and 101D which are formed on the piezoelectric element 109 and to which a voltage is applied, a secondary electrode 102 which is formed on the piezoelectric element 109 and from which a voltage higher than the voltage applied to the primary electrode is output, and a sensor electrode 103 which is formed on the piezoelectric element 109 and from which a voltage lower than the output voltage of the secondary electrode is output.

5. 发明授权

US6084336A Piezoelectric transformer 失效
标题翻译：压电变压器
公开(公告)号：US6084336A
公开(公告)日：2000-07-04
申请号：US154737
申请日：1998-09-17
申请人： Osamu Kawasaki , Katsunori Moritoki , Hiroshi Nakatsuka
发明人： Osamu Kawasaki , Katsunori Moritoki , Hiroshi Nakatsuka
IPC分类号： H01L41/107
CPC分类号： H01L41/107
摘要： A piezoelectric transformer has;a rectangular plate having a principal direction coinciding with a longitudinal direction or a lateral direction, said plate being made of a piezoelectric material;one set of primary electrodes which are formed on faces of said rectangular plate, respectively, said faces being opposed to each other in a thickness direction; andone set of secondary electrodes which are formed on said rectangular plate, whereinat least one of said primary electrodes covers a center portion of said rectangular plate with respect to said principal direction, and is disposed so as not to overlap with end portions of said rectangular plate with respect to said principal direction,each of said secondary electrodes consists of a single electrode member, andan AC voltage applied between said primary electrodes causes said rectangular plate to produce such a mechanical vibration of a half wave length that said rectangular plate expands and contracts in said principal direction, thereby outputting a voltage from said secondary electrodes.
摘要翻译：压电变压器有; 具有与长度方向或横向一致的主方向的矩形板，所述板由压电材料制成; 分别形成在所述矩形板的表面上的一组初级电极，所述面在厚度方向上彼此相对; 以及形成在所述矩形板上的一组二次电极，其中所述主电极中的至少一个相对于所述主方向覆盖所述矩形板的中心部分，并且被设置成不与所述矩形板的端部重叠相对于所述主方向的矩形板，每个所述次级电极由单个电极构件组成，并且施加在所述主电极之间的AC电压使所述矩形板产生半波长的机械振动，所述矩形板膨胀并沿所述主方向收缩，由此从所述次级电极输出电压。

6. 发明授权

US06509700B2 Apparatus and method for driving a cathode discharge tube 失效
公开(公告)号：US06509700B2
公开(公告)日：2003-01-21
申请号：US09987869
申请日：2001-11-16
申请人： Hiroshi Nakatsuka , Takeshi Yamaguchi , Katsu Takeda , Katsunori Moritoki , Kojiro Okuyama
发明人： Hiroshi Nakatsuka , Takeshi Yamaguchi , Katsu Takeda , Katsunori Moritoki , Kojiro Okuyama
IPC分类号： G05F100
CPC分类号： H05B41/2827 , Y10S315/05
摘要： The invention provides an apparatus and a method for driving a cathode discharge tube such that the discharge starting voltage can be lowered by simple construction. At the start of lighting a cathode discharge tube light, AC voltage applied to the cathode discharge tube is raised at a speed slower than a rise speed of the cathode discharge tube. By lighting the cathode discharge tube in this way, the lighting start voltage can be reduced.

7. 发明授权

US07145281B2 Driving circuit for piezoelectric transformer, cold-cathode tube light-emitting apparatus, liquid crystal panel and device with built-in liquid crystal panel 失效
公开(公告)号：US07145281B2
公开(公告)日：2006-12-05
申请号：US11217004
申请日：2005-08-31
申请人： Katsu Takeda , Hiroshi Nakatsuka , Katsunori Moritoki
发明人： Katsu Takeda , Hiroshi Nakatsuka , Katsunori Moritoki
IPC分类号： H01L41/107
CPC分类号： H05B41/2822 , H01L41/044 , H05B41/2855 , H05B41/392
摘要： A driving circuit for a piezoelectric transformer is provided, which ensures lighting of all the cold-cathode tubes connected to the piezoelectric transformer, and reduces the difference in brightness between the cathode tubes during steady lighting, thereby enhancing reliability and performance. A plurality of cold-cathode tubes connected to a secondary side of the piezoelectric transformer, and a cold-cathode tube output detector circuit connected in series to a plurality of cold-cathode tubes, for detecting an output state of the respective cold-cathode tubes are provided, and the driving of the piezoelectric transformer is controlled based on a detection signal from the cold-cathode tube output detector circuit. Because of this, the piezoelectric transformer performs the same operation as that with respect to one cold-cathode tube.

8. 发明授权

US07034800B2 Driving circuit and driving method for piezoelectric transformer, backlight apparatus, liquid crystal display apparatus, liquid crystal monitor, and liquid crystal TV 失效
标题翻译：压电变压器，背光装置，液晶显示装置，液晶监视器和液晶电视的驱动电路和驱动方法
公开(公告)号：US07034800B2
公开(公告)日：2006-04-25
申请号：US10295401
申请日：2002-11-14
申请人： Hiroshi Nakatsuka , Katsu Takeda , Takashi Ishikawa , Katsunori Moritoki
发明人： Hiroshi Nakatsuka , Katsu Takeda , Takashi Ishikawa , Katsunori Moritoki
IPC分类号： G09G3/36 , G09G5/00 , H05B41/16 , H01L41/04
CPC分类号： H05B41/3925 , H05B41/2827 , H05B41/2828 , Y02B20/186
摘要： A driving circuit for a piezoelectric transformer is provided, which is capable of driving a piezoelectric transformer at a high efficiency and with low distortion, and being miniaturized. At the commencement of lighting a cold-cathode fluorescent tube, a digital controller fixes frequencies of first and second control signals VC1 and VC2 at a predetermined frequency and controls the phase difference therebetween so that an output power of the piezoelectric transformer becomes from substantially zero to a predetermined output power. After lighting of the cold-cathode fluorescent tube, the digital controller controls the phase difference between the first and second control signals VC1 and VC2 so that current detecting data CD substantially is matched with reference data RD.
摘要翻译：提供了一种用于压电变压器的驱动电路，其能够以高效率和低失真地驱动压电变压器并且小型化。在开始冷阴极荧光灯照明时，数字控制器以预定频率固定第一和第二控制信号VC 1和VC 2的频率，并且控制它们之间的相位差，使得压电变压器的输出功率基本上变为零到预定的输出功率。在冷阴极荧光灯照明之后，数字控制器控制第一和第二控制信号VC 1和VC 2之间的相位差，使得电流检测数据CD基本上与参考数据RD匹配。

9. 发明授权

US06812623B2 Piezoelectric transformer 失效
标题翻译：压电变压器
公开(公告)号：US06812623B2
公开(公告)日：2004-11-02
申请号：US10253757
申请日：2002-09-23
申请人： Katsu Takeda , Hiroshi Nakatsuka , Takeshi Yamaguchi , Kojiro Okuyama , Katsunori Moritoki
发明人： Katsu Takeda , Hiroshi Nakatsuka , Takeshi Yamaguchi , Kojiro Okuyama , Katsunori Moritoki
IPC分类号： H01L4108
CPC分类号： H05B41/2822 , H01L41/107
摘要： A compact and high-power piezoelectric transformer is realized by using higher order longitudinal extensional mode vibrations and increasing an effective electromechanical coupling factor by a primary electrode which consists of plural electrodes.
摘要翻译：通过使用高阶纵向拉伸模式振动并通过由多个电极组成的主电极增加有效的机电耦合系数来实现小型和大功率的压电变压器。

10. 发明申请

US20060038466A1 Piezoelectric transformer, piezoelectric transformer unit, inverter circuit, light emission control device, and liquid crystal display device 审中-公开
公开(公告)号：US20060038466A1
公开(公告)日：2006-02-23
申请号：US11249640
申请日：2005-10-13
申请人： Hiroshi Nakatsuka , Katsu Takeda , Katsunori Moritoki , Hiroshi Fukushima , Yusuke Adachi
发明人： Hiroshi Nakatsuka , Katsu Takeda , Katsunori Moritoki , Hiroshi Fukushima , Yusuke Adachi
IPC分类号： H01L41/107
CPC分类号： H05B41/2822 , H01L41/107
摘要： A low loss, small scale piezoelectric transformer, suited for a cold cathode tube load, and having a high effective coupling factor, is provided using a piezoelectric plate having a single polarization direction. Controlling the dimensions of the third electrode portion 15a constituting the high impedance portion makes it possible easily to adjust the capacitance of the electrostatic capacitor formed between the first electrode portion 12 and the third electrode portion in accordance with the load. Also, the second electrode portion 13 and the fourth electrode portion 15b constituting the low impedance portion are substantially equal in area and the third electrode portion and the fourth electrode portion are formed in one piece, so that energy propagation efficiency can be increased. Consequently, the effective coupling factor resulting from the electrode structure and the vibration mode can be kept high even if the capacitance is changed freely, and thus high element efficiency and a small amount of generated heat can be maintained and stress can be decreased.

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