Abstract:
PROBLEM TO BE SOLVED: To provide a piezoelectric oscillator having a sleep mode. SOLUTION: The piezoelectric oscillator includes: an oscillation circuit 110 for outputting an oscillation signal Vp obtained by oscillating a piezoelectric vibrator 100; a current source circuit 120 for supplying a current Id to the oscillation circuit 110; a buffer circuit 130 for outputting an output signal OUT obtained by shaping the oscillation signal Vp outputted from the oscillation circuit 110; and a control terminal 140 to which a control signal SL for switching between a sleep mode and a normal mode is inputted. The current source circuit 120 includes a first switching section 124 for switching the current Id to be supplied to the oscillation circuit 110 so as to be reduced in the sleep mode of the control signal SL as compared with the normal mode. The buffer circuit 130 includes a first switching section 132 for stopping current supply to elements configuring the buffer circuit 130 in the sleep mode of the control signal SL and a third switching section 133 for switching the oscillation signal Vp so as not to be outputted in the sleep mode of the control signal SL. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a piezoelectric vibrator that has a structure that prevents reduction in capacity ratio and is suitable for the formation of a precise electrode, miniaturization, and mass production, and to provide a method for manufacturing the piezoelectric vibrator. SOLUTION: Fig. (a) indicates a top view and Fig. (b) indicates a side view from a direction A. In the piezoelectric vibrator 21 having a mesa structure, projections 23 are formed on both main surfaces of a piezoelectric substrate 22 before excitation electrodes 24 are formed on the front and rear of the projection 23 for being connected to a pad electrode 26 via a lead electrode 25. As shown in the figure, the excitation electrode 24 is extended from the projection 23 of the piezoelectric substrate 22 for forming, thus increasing a capacity C 0 determined according to electrode dimensions (size) and then increasing the capacity ratio in the piezoelectric vibrator. Additionally, the area (the amount of electrode) of a portion expanded from the projection 23 in the excitation electrode 24 varies, thus enabling the capacity ratio in the piezoelectric vibrator having the mesa structure to be set arbitrarily. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a sensor device for securing a flat surface on the top surface of a resin part, even when the angle between a mounting surface and a sensor-element mounting surface becomes large. SOLUTION: The device is a gyro sensor device 100. A gyro sensor unit 50 includes: a gyro sensor 10 provided with a crystal oscillating piece 12 having a detection axis, and a package 40; a first resin part 76 which covers the gyro sensor 10; and a first lead 52 where a first mounted terminal exposed outside the first resin part 76 is formed, and which supports the gyro sensor 10 while inclining it with respect to a first mounting surface determined by the first mounted terminal. The gyro sensor device 100 includes: a second resin part 124 which covers the gyro sensor unit 50; and a second lead 102 where a second mounted terminal exposed outside the second resin part 124 is formed, and which supports the gyro sensor unit 50 while inclining it with respect to a second mounting surface determined by the second mounted terminal. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a laminated retardation plate further improved in polarization converting efficiency of incident light than conventional technology. SOLUTION: A first retardation plat 10 and a second retardation plate 20 are bonded so as to intersect the optical axes 11, 21, thereby a laminated retardation plate 1 which functions as a half-wave retardation plate in 400-700 nm wavelength region. Where each plate thickness of the first retardation plate 10 and the second retardation plate 20 are in the range capable of mutually compensating the deviation in the phase difference. The laminated retardation plate 1 which is improved in polarization converting efficiency of the incident light than the conventional technology can be provided. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a compact piezoelectric vibrator excellent in impact resistance. SOLUTION: The piezoelectric vibrator 10 includes: a package 12; and a piezoelectric vibration piece 24 provided with a base part 30, a vibration arm 26 extending from the base part 30 and a support arm 28 extending from the base part 26 in the longitudinal direction of the vibration arm 26, housed in the package 12 and supported by fixing the support arm 28 to the bottom surface of the package 12. A first recess 14a is formed in an area facing the distal end 30a of the base part 30 on the bottom surface of the package 12. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To keep the attitude of a piezoelectric vibrator constant at a stage before curing an adhesive by using electrostatic repulsive force between a piezoelectric vibration element and a substitute lid or suction force, to keep a finally-obtained attitude constant by curing the adhesive in this state, and to always keep constant a gap between the bottom face of a package recessed part or the lid and the piezoelectric vibration element. SOLUTION: The method of manufacturing a piezoelectric vibrator includes: a mounting step of mounting and sticking one end of a piezoelectric vibration element 20 on a conductive adhesive 25 in a non-cured state; an element charging step of charging the piezoelectric vibration element; a substitute lid charging step of charging the substitute lid 60; a substitute lid mounting step of mounting the substitute lid on a circumferential upper surface 3a of a recessed part 3; an adhesive drying step of drying and curing the conductive adhesive; and a lid fixing step of fixing a lid 15 on a circumferential upper surface of the recessed part instead of the substitute lid. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To widen the adjustment range of the oscillation frequency of a voltage-controlled piezoelectric oscillator. SOLUTION: The voltage-controlled piezoelectric oscillator 100 includes: a piezoelectric vibrator 100, including a first terminal P1 and a second terminal P2; an oscillation circuit 200, including varactors VC1 and VC2 whose electrostatic capacity is changed by a control voltage Vc applied from the outside, and a third terminal P3 and a fourth terminal P4, and for oscillating the piezoelectric vibrator 100 and outputting the oscillation signals of a prescribed frequency; a package 10 including the piezoelectric vibrator and the oscillation circuit 200; a first switching part 310, which is connected between the first terminal P1 and the third terminal P3, capable of changing the capacitance value and inductance value of wiring, and is formed on the package 10; and a second switching part 320, which is connected in between the second terminal P2 and the fourth terminal P4, capable of changing the capacitance value and inductance value of wiring, and is formed on the package 10. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a gyro module allowing detection of three-axis angular velocity. SOLUTION: The three-axis gyro module 10 comprises a first gyro element piece 12, a second gyro element piece 14, and a third gyro element piece 110 having two detection axes respectively; a first operational circuit 112 subtracting output signals of the second gyro element piece 14 and the third gyro element piece 110 and outputting it; a second operational circuit 114 adding output signals of the second gyro element piece 14 and the third gyro element piece 110 and outputting it; and a third operational circuit 116 calculating output signals of the first gyro element piece 12 and the first operational circuit 112 and outputting it. The extending directions of the first detection axis of the first gyro element piece 12, the first detection axis of the second gyro element piece 14, and the first detection axis of the third gyro element piece 110 are coincident; and the extending directions of the second detection axis of the first gyro element piece 12 and the second detection axis of the second gyro element piece 14 are intersecting with each other. COPYRIGHT: (C)2010,JPO&INPIT