Patent application number | Description | Published |
20110095844 | ELASTIC WAVE DEVICE AND LADDER FILTER DEVICE - An elastic wave device includes a first elastic wave resonator and a second elastic wave resonator that are connected in series to each other, and a resistor is connected in parallel with the first elastic wave resonator while no resistors are connected in parallel with the second elastic wave resonator. | 04-28-2011 |
20110120679 | PIEZOELECTRIC FAN AND COOLING DEVICE - A piezoelectric element is attached to a vibrating plate. By expanding and contracting the piezoelectric element, the vibrating plate is bent. The vibrating plate includes removed regions on both sides of a portion to which the piezoelectric element is attached. The vibrating plate includes a plurality of the blades provided at one end thereof. By bending the vibrating plate, the blades swing. The blades are bent toward grooves between heat dissipating fins of a heat sink. The other end of the vibrating plate is fixed with screws to an upper portion of the heat sink with a supporting plate disposed therebetween such that the each of the blades are located in a groove between the heat dissipating fins of the heat sink and the removed regions are located over the grooves between the heat dissipating fins. | 05-26-2011 |
20110223043 | PIEZOELECTRIC FAN AND COOLING DEVICE - A piezoelectric fan includes reinforcing plates that increase the rigidity of a portion of the vibrating plate corresponding to a gap between a piezoelectric element and a fixing plate. First ends of the reinforcing plates are attached to portions of the vibrating plate on both sides of piezoelectric elements in the width direction, and second ends of the reinforcing plates are attached to a fixed end of the vibrating plate such that the second ends and the fixing plate sandwich the fixed end of the vibrating plate therebetween and such that the reinforcing plates extend over the gap. The reinforcing plates prevent vibration of the portion of the vibrating plate corresponding to the gap, prevent a portion of vibration energy generated by expansion and contraction of the piezoelectric elements from being consumed in the portion corresponding to the gap, and increase the amplitude of the vibration of blade ends. | 09-15-2011 |
20120025931 | BOUNDARY ACOUSTIC WAVE RESONATOR AND LADDER FILTER - In a boundary acoustic wave resonator, apodization weighting is performed on an IDT electrode so that an intersecting width decreases as a location moves outward in a boundary acoustic wave propagation direction. An inner side of a first busbar includes inclined portions that are disposed a predetermined distance from an envelope portion B | 02-02-2012 |
20140169996 | PIEZOELECTRIC ACTUATOR - A piezoelectric fan includes a vibration sheet, piezoelectric elements, a reinforcing sheet having one principal surface bonded to the vibration sheet and the other principal surface bonded to the piezoelectric element, and a fixing sheet. The vibration sheet is fixed to the inside of an electronic device by the fixing sheet which is disposed at one end of the vibration sheet. The total thickness of the reinforcing sheet and a region of the vibration sheet in which the piezoelectric elements are disposed is greater than the average thickness of a region of the vibration sheet in which the piezoelectric elements are not disposed. The coefficient of linear expansion of the vibration sheet is higher than that of the first and second piezoelectric elements. The reinforcing sheet is formed of a material having a coefficient of linear expansion and a modulus of elasticity identical to the vibration sheet. | 06-19-2014 |
20140175948 | PIEZOELECTRIC ACTUATOR - A piezoelectric fan includes a vibration sheet, piezoelectric elements, a reinforcing sheet bonded to at least one of principal surfaces of the piezoelectric element, a reinforcing sheet bonded to at least one of principal surfaces of the piezoelectric element, and a fixing sheet. The vibration sheet is fixed to the inside of an electronic device by the fixing sheet disposed at one end of the vibration sheet. The total thickness of the reinforcing sheets and a region of the vibration sheet adjacent to the piezoelectric elements is greater than the average thickness of a region of the vibration sheet in which the piezoelectric elements are not disposed. The piezoelectric elements are disposed symmetrically to the center plane of the thickness direction of the vibration sheet. The reinforcing sheets are disposed symmetrically to the center plane of the thickness direction of the vibration sheet. | 06-26-2014 |
20140341762 | PIEZOELECTRIC FAN - A piezoelectric fan includes a vibrating plate including blades and a base that are integral. Piezoelectric elements are mounted on the blade on the side of the base. Piezoelectric elements are mounted on the blade on the side of the base. Piezoelectric elements are mounted on the blade on the side of the base. Support bodies are disposed such that the base of the vibrating plate is sandwiched therebetween. A portion of each of the piezoelectric elements is sandwiched between the vibrating plate and the support plate, and a portion of each of the piezoelectric elements is sandwiched between the vibrating plate and the support plate. | 11-20-2014 |
20150023819 | PIEZOELECTRIC FAN - A piezoelectric fan in which vibration of blades is unaffected by external noise includes a vibrating plate including blades and a base. First piezoelectric elements are attached to a side of a first blade adjacent to the base. Second piezoelectric elements are attached to a side of a second blade adjacent to the base. Third piezoelectric elements are attached to a side of a third blade adjacent to the base. A holder includes a supporting body and a holding member that sandwich the base therebetween. The holding member has a supporting portion and main-body fixing portions including respective main-body fixing holes. The main-body fixing portions extend from the supporting portion. | 01-22-2015 |