公开(公告)号：EP1267426A3

公开(公告)日：2005-06-15

申请号：EP02254136.1

申请日：2002-06-13

Applicant: Matsushita Electric Industrial Co., Ltd.

Inventor： Nakatsuka, Hiroshi ,  Takeda, Katsu ,  Adachi, Yusuke ,  Moritoki, Katsunori ,  Fukushima, Hiroshi

IPC: H01L41/107 ,  H05B41/282

CPC classification number: H05B41/2822 ,  H01L41/107

Abstract: 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.

公开(公告)号：EP1277957A2

公开(公告)日：2003-01-22

申请号：EP02015582.6

申请日：2002-07-12

Applicant: Matsushita Electric Industrial Co., Ltd.

Inventor： Komatsu, Atsushi ,  Okano, Masayuki ,  Imada, Katsumi ,  Ninomiya, Toru ,  Adachi, Yusuke

IPC: F04B43/04 ,  F04B53/06

CPC classification number: F04B53/06 ,  F04B43/046

Abstract: A miniature pump 100 includes a miniature pump portion 101 including a suction passage 70a through which a liquid flows in, and a discharge passage 70b through which the liquid flows out, and a bubble trap portion 40 for blocking an entry of air bubbles into the miniature pump portion 101. Since the bubble trap portion 40 prevents the entry of air bubbles into the miniature pump portion 101, a deterioration of pump characteristics owing to the entry of air bubbles can be suppressed, making it possible to obtain a miniature pump that achieves both a large discharge flow rate and stable discharge flow rate characteristics.

Abstract translation: 微型泵100包括微型泵部分101，其包括液体流入的吸入通道70a和液体流出的排放通道70b，以及用于阻止气泡进入微型的气泡收集部分40 由于气泡收集部40防止气泡进入微型泵部101，因此能够抑制由气泡的进入导致的泵特性的劣化，能够获得实现两者的微型泵 放电流量大，放电流量特性稳定。

公开(公告)号：EP1277957B1

公开(公告)日：2007-09-12

申请号：EP02015582.6

申请日：2002-07-12

Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD

Inventor： Komatsu, Atsushi ,  Okano, Masayuki ,  Imada, Katsumi ,  Ninomiya, Toru ,  Adachi, Yusuke

IPC: F04B43/04 ,  F04B53/06

CPC classification number: F04B53/06 ,  F04B43/046

公开(公告)号：EP1277957A3

公开(公告)日：2004-03-17

申请号：EP02015582.6

申请日：2002-07-12

Applicant: Matsushita Electric Industrial Co., Ltd.

Inventor： Komatsu, Atsushi ,  Okano, Masayuki ,  Imada, Katsumi ,  Ninomiya, Toru ,  Adachi, Yusuke

IPC: F04B43/04 ,  F04B53/06

CPC classification number: F04B53/06 ,  F04B43/046

Abstract: A miniature pump 100 includes a miniature pump portion 101 including a suction passage 70a through which a liquid flows in, and a discharge passage 70b through which the liquid flows out, and a bubble trap portion 40 for blocking an entry of air bubbles into the miniature pump portion 101. Since the bubble trap portion 40 prevents the entry of air bubbles into the miniature pump portion 101, a deterioration of pump characteristics owing to the entry of air bubbles can be suppressed, making it possible to obtain a miniature pump that achieves both a large discharge flow rate and stable discharge flow rate characteristics.

公开(公告)号：EP1267426A2

公开(公告)日：2002-12-18

申请号：EP02254136.1

申请日：2002-06-13

Applicant: Matsushita Electric Industrial Co., Ltd.

Inventor： Nakatsuka, Hiroshi ,  Takeda, Katsu ,  Adachi, Yusuke ,  Moritoki, Katsunori ,  Fukushima, Hiroshi

IPC: H01L41/107 ,  H05B41/282

CPC classification number: H05B41/2822 ,  H01L41/107

Abstract: 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.

Abstract translation: 使用具有单一偏振方向的压电板，提供适用于冷阴极管负载并具有高有效耦合系数的低损耗小型压电变压器。 控制构成高阻抗部分的第三电极部分15a的尺寸使得可以容易地根据负载来调节形成在第一电极部分12和第三电极部分之间的静电电容器的电容。 此外，构成低阻抗部的第二电极部13和第四电极部15b的面积大致相等，第三电极部和第四电极部形成为一体，能够提高能量传播效率。 因此，即使电容自由变化，电极结构和振动模式产生的有效耦合因子也能够保持较高，从而可以保持高的元件效率和少量的产生的热量并且可以降低应力。