| 摘要 |
PURPOSE: To realize both the high boosting ratio and high efficiency, and drive a discharge tube by alternately layering and forming piezoelectric bodies whose area is polarized in the thickness direction and internal electrodes connected to external electrodes every other single layer, and manufacturing them by integral baking. CONSTITUTION: Input internal electrodes 57 and 58 are printed on a part on a green sheet of piezoelectric ceramics, and they are layered, press-fitted and sintered. After they are cut and polished, input external electrodes 51 and 52 and an output electrode 55 are arranged by baking of silver or the like, and the electrodes 51 and 52 are respectively connected to the electrodes 57 and 58. Insulating layers 59 are arranged between the electrodes 52 and 57 and between the electrodes 51 and 58, and contact is prevented. Polarization processing in the thickness direction and the longitudinal direction is performed and completed, bolstered Therefore, since the boosting ratio increases to about layering times, high voltage is obtained by comparatively low load resistance, and a discharge tube such as a cold cathode tube is driven with high efficiency. In the case of excitation in an ordinary full wave length mode, since vibrational displacement in a 1/4 part of the total length is smallest, it is desirable that the external electrodes are arranged in this position. |
