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1. 发明授权

US11515468B2 Piezoelectric ceramics, manufacturing method for piezoelectric ceramics, piezoelectric element, vibration device, and electronic device 有权
公开(公告)号：US11515468B2
公开(公告)日：2022-11-29
申请号：US16263290
申请日：2019-01-31
申请人： CANON KABUSHIKI KAISHA
发明人： Makoto Kubota , Yasushi Shimizu , Takanori Matsuda , Tatsuo Furuta , Kaoru Miura , Miki Ueda , Kanako Oshima
IPC分类号： H01L41/18 , H01L41/187 , H01L41/083 , H01L41/047 , H01L41/09 , C04B35/468 , H01L41/43 , C04B35/626
摘要： Provided is a piezoelectric ceramics having a gradual change in piezoelectric constant depending on an ambient temperature. Specifically, provided is a single-piece piezoelectric ceramics including as a main component a perovskite-type metal oxide represented by a compositional formula of ABO3, wherein an A site element in the compositional formula contains Ba and M1, the M1 being formed of at least one kind selected from the group consisting of Ca and Bi, wherein a B site element in the compositional formula contains T1 and M2, the M2 being formed of at least one kind selected from the group consisting of Zr, Sn, and Hf, wherein concentrations of the M1 and the M2 change in at least one direction of the piezoelectric ceramics, and wherein increase and decrease directions of concentration changes of the M1 and the M2 are directions opposite to each other.

2. 发明授权

US11201279B2 Piezoelectric material, piezoelectric element, vibration wave motor, optical apparatus, and electronic apparatus 有权
公开(公告)号：US11201279B2
公开(公告)日：2021-12-14
申请号：US16051605
申请日：2018-08-01
申请人： CANON KABUSHIKI KAISHA
发明人： Tomohiro Watanabe , Makoto Kubota , Akira Uebayashi , Kanako Oshima , Tatsuo Furuta
IPC分类号： H01L41/18 , H01L41/09 , H01L41/047 , C04B35/468 , H01L41/187 , H01L41/083 , B32B18/00 , C04B35/634 , C04B35/626 , H01L41/43 , H02N2/10 , H02N2/16 , H04N5/225 , G02B7/10
摘要： A piezoelectric material which is low in load on the environment, and also satisfies both the requirements of a high piezoelectric constant and a high mechanical quality factor. The piezoelectric material comprises a plurality of crystal grains containing Ba, Ca, Ti, Zr, Mn, and O. An average equivalent circle diameter of the crystal grains is not smaller than 1.0 μm and not larger than 10 μm. The crystal grains include crystal grains A each having a first domain with a width of not smaller than 300 nm and not larger than 800 nm, and crystal grains B each having a second domain with a width of not smaller than 20 nm and not larger than 50 nm.

3. 发明授权

US11038440B2 Vibrator with low power consumption, vibration type actuator, and electronic apparatus 有权
公开(公告)号：US11038440B2
公开(公告)日：2021-06-15
申请号：US15961122
申请日：2018-04-24
申请人： CANON KABUSHIKI KAISHA
发明人： Miki Ueda , Tatsuo Furuta , Takayuki Watanabe , Shinya Koyama , Jumpei Hayashi , Makoto Kubota
IPC分类号： H02N2/02 , H01L41/09 , H01L41/047 , G03B13/32 , H01L41/187 , H01L41/053 , G03B3/10 , H02N2/00
摘要： A vibrator which is constructed by bonding a piezoelectric element and an elastic body together via a bonding layer. The piezoelectric element has a piezoelectric ceramic and electrodes. The bonding layer has an unbonded region that is located close to a nodal line of a vibration in a primary out-of-plane vibration mode when the vibration is excited in the vibrator, and in the unbonded region, the piezoelectric element and the elastic body are not bonded together.

4. 发明授权

US10516091B2 Ultrasonic motor, drive control system, optical apparatus, and vibrator 有权
公开(公告)号：US10516091B2
公开(公告)日：2019-12-24
申请号：US15354366
申请日：2016-11-17
申请人： CANON KABUSHIKI KAISHA
发明人： Tatsuo Furuta , Akira Uebayashi , Hidenori Tanaka , Shinya Koyama , Makoto Kubota , Jumpei Hayashi
IPC分类号： H01L41/09 , H02N2/00 , G02B7/04 , H01L41/04 , H01L41/047 , H01L41/16 , H01L41/187 , G02B7/08 , H02N2/16
摘要： An ultrasonic motor, usable in a drive control system and the like, includes an annular vibrator and an annular moving member arranged so as to be brought into pressure-contact with the vibrator. The vibrator includes an annular vibrating plate and an annular piezoelectric element. The piezoelectric element includes an annular piezoelectric ceramic piece, a common electrode arranged on one surface of the piezoelectric ceramic piece, and a plurality of electrodes arranged on the other surface of the piezoelectric ceramic piece. The piezoelectric ceramic piece contains lead in a content of less than 1,000 ppm. The plurality of electrodes include two drive phase electrodes, one or more non-drive phase electrodes, and one or more detection phase electrodes.

5. 发明授权

US10424721B2 Piezoelectric element, multilayered piezoelectric element, liquid discharge head, liquid discharge apparatus, ultrasonic motor, optical apparatus, and electronic apparatus 有权
公开(公告)号：US10424721B2
公开(公告)日：2019-09-24
申请号：US15098169
申请日：2016-04-13
申请人： CANON KABUSHIKI KAISHA
发明人： Jumpei Hayashi , Kenichi Takeda , Shinya Koyama , Kenichi Akashi , Tatsuo Furuta
IPC分类号： H01L41/09 , C04B35/626 , C04B35/634 , H01L41/083 , H01L41/187 , H02N2/16 , H02N2/10 , C04B35/49 , B41J2/14 , C04B35/468
摘要： A lead-free piezoelectric element that stably operates in a wide operating temperature range contains a lead-free piezoelectric material. The piezoelectric element includes a first electrode, a second electrode, and a piezoelectric material that includes a perovskite-type metal oxide represented by (Ba1-xCax)a(Ti1-yZry)O3 (1.00≤a≤1.01, 0.02≤x≤0.30, 0.020≤y≤0.095, and y≤x) as a main component and manganese incorporated in the perovskite-type metal oxide. The manganese content relative to 100 parts by weight of the perovskite-type metal oxide is 0.02 parts by weight or more and 0.40 parts by weight or less on a metal basis.

6. 发明申请

US20180316284A1 VIBRATOR WITH LOW POWER CONSUMPTION, VIBRATION-TYPE ACTUATOR, AND ELECTRONIC APPARATUS 审中-公开
公开(公告)号：US20180316284A1
公开(公告)日：2018-11-01
申请号：US15961122
申请日：2018-04-24
申请人： CANON KABUSHIKI KAISHA
发明人： Miki Ueda , Tatsuo Furuta , Takayuki Watanabe , Shinya Koyama , Jumpei Hayashi , Makoto Kubota
IPC分类号： H02N2/02 , H01L41/047 , H01L41/053 , H01L41/09 , H01L41/187 , G03B13/32
摘要： A vibrator which is constructed by bonding a piezoelectric element and an elastic body together via a bonding layer. The piezoelectric element has a piezoelectric ceramic and electrodes. The bonding layer has an unbonded region that is located close to a nodal line of a vibration in a primary out-of-plane vibration mode when the vibration is excited in the vibrator, and in the unbonded region, the piezoelectric element and the elastic body are not bonded together.

7. 发明授权

US09722170B2 Piezoelectric material, piezoelectric element, and electronic device 有权
公开(公告)号：US09722170B2
公开(公告)日：2017-08-01
申请号：US14328466
申请日：2014-07-10
申请人： CANON KABUSHIKI KAISHA
发明人： Takayuki Watanabe , Hidenori Tanaka , Shunsuke Murakami , Tatsuo Furuta , Hisato Yabuta
IPC分类号： H01L41/187 , C04B35/00 , H01L41/18 , C04B35/468 , B41J2/14 , G02B7/04 , H01L41/083 , H01L41/09 , H02N2/16 , G02B27/00 , H02N2/10 , G02B15/02 , H04N5/232 , G03B3/10
CPC分类号： H01L41/183 , B41J2/14233 , B41J2202/03 , C04B35/4682 , G02B7/04 , G02B15/02 , G02B27/0006 , G03B3/10 , H01L41/083 , H01L41/0973 , H01L41/1871 , H02N2/106 , H02N2/163 , H04N5/23209
摘要： There is provided a piezoelectric material not containing any lead component, having stable piezoelectric characteristics in an operating temperature range, a high mechanical quality factor, and satisfactory piezoelectric characteristics. The piezoelectric material includes a main component containing a perovskite-type metal oxide that can be expressed using the following general formula (1), and subcomponents containing Mn, Li, and Bi. When the metal oxide is 100 parts by weight, the content of Mn on a metal basis is not less than 0.04 parts by weight and is not greater than 0.36 parts by weight, content α of Li on a metal basis is not less than 0.0013 parts by weight and is not greater than 0.0280 parts by weight, and content β of Bi on a metal basis is not less than 0.042 parts by weight and is not greater than 0.850 parts by weight (Ba1-xCax)a(Ti1-y-zZrySnz)O3 (1) (in the formula (1), 0.09≦x≦0.30, 0.074

8. 发明授权

US09680085B2 Ceramic powder, piezoelectric ceramic, piezoelectric element, and electronic equipment 有权
公开(公告)号：US09680085B2
公开(公告)日：2017-06-13
申请号：US14638998
申请日：2015-03-04
申请人： CANON KABUSHIKI KAISHA
发明人： Tatsuo Furuta , Yasushi Shimizu , Hidenori Tanaka , Akira Uebayashi
IPC分类号： H01L41/083 , B06B1/06 , B41J2/14 , H01L41/187 , H02N2/00 , H01L41/09 , H02N2/16 , H04N5/225
CPC分类号： H01L41/083 , B06B1/06 , B41J2/14201 , B41J2/14233 , B41J2202/03 , H01L41/0926 , H01L41/0973 , H01L41/1871 , H02N2/001 , H02N2/163 , H04N5/2251 , Y10T428/2982
摘要： A ceramic powder contains a metal oxide represented by the following general formula (1). The ceramic powder has a single perovskite-type crystal phase. The ceramic powder is composed of particles having an average equivalent circular diameter in the range of 100 nm or more and less than 1000 nm and has a ratio c1/a1 in the range of 1.000≦c1/a1≦1.010, wherein c1 and a1 denote the c-axis length and a-axis length, respectively, of unit cells of the perovskite-type metal oxide, c1 being greater than or equal to a1. formula (1)(Ba1-xCax)α(Ti1-y-zZryMnz)O3(0.9900≦α≦1.0100, 0.125≦x≦0.300, 0.020≦y≦0.095, 0.003≦z≦0.016).

9. 发明申请

US20170040528A1 PIEZOELECTRIC ELEMENT OSCILLATORY WAVE MOTOR AND OPTICAL APPARATUS 审中-公开
标题翻译：压电元件振荡波电机和光学设备
公开(公告)号：US20170040528A1
公开(公告)日：2017-02-09
申请号：US15298011
申请日：2016-10-19
申请人： CANON KABUSHIKI KAISHA
发明人： Tatsuo Furuta , Hiroshi Saito , Makoto Kubota , Kenichi Akashi
IPC分类号： H01L41/312 , H02N2/10 , H02N2/16 , H01L41/257
摘要： A piezoelectric element that can decrease the output voltage for detection relative to the input voltage for driving without requiring a step-down circuit between a detection phase electrode and a phase comparator and an oscillatory wave motor including the piezoelectric element are provided. A piezoelectric element includes a piezoelectric material having a first surface and a second surface, a common electrode disposed on the first surface, and a drive phase electrode and a detection phase electrode disposed on the second surface. An absolute value d(1) of a piezoelectric constant of the piezoelectric material in a portion (1) sandwiched between the drive phase electrode and the common electrode and an absolute value d(2) of a piezoelectric constant of the piezoelectric material in a portion (2) sandwiched between the detection phase electrode and the common electrode satisfy d(2)
摘要翻译：提供一种压电元件，其能够相对于用于驱动的输入电压而降低用于检测的输出电压，而不需要检测相位电极和相位比较器之间的降压电路以及包括压电元件的振荡波马达。压电元件包括具有第一表面和第二表面的压电材料，设置在第一表面上的公共电极，以及布置在第二表面上的驱动相电极和检测相位电极。夹在驱动相电极和公共电极之间的部分（1）中的压电材料的压电常数的绝对值d（1）和压电材料的压电常数的绝对值d（2）（2）夹在检测相电极和公共电极之间，满足d（2）

10. 发明授权

US09413928B2 Dust removal apparatus and image pickup apparatus 有权
标题翻译：除尘装置和摄像装置
公开(公告)号：US09413928B2
公开(公告)日：2016-08-09
申请号：US14685845
申请日：2015-04-14
申请人： CANON KABUSHIKI KAISHA
发明人： Yasushi Shimizu , Kenichi Takeda , Toshihiro Ifuku , Makoto Kubota , Jumpei Hayashi , Tatsuo Furuta , Kazuki Matsushima
IPC分类号： H04N5/228 , H04N5/217 , H04N5/225
CPC分类号： H04N5/2171 , H04N5/2251 , H04N5/2253 , H04N5/2254
摘要： A dust removal apparatus includes a vibrating plate, a piezoelectric element, a power supply that applies the piezoelectric element with an alternating voltage; and a control circuit that changes a frequency of the alternating voltage, in which the piezoelectric element includes first and second electrodes and a piezoelectric material, a phase transition temperature T from a first crystal phase to a second crystal phase of the piezoelectric material is −40° C.≦T≦85° C., the change of the frequency is for repeating a frequency sweep operation from a first frequency to a second frequency, and when a frequency at which an audible vibration is generated during the sweep operation is set as fns, a frequency at which the audible vibration is ended is set as fne, and a changing time from fns to fne during the sweep operation is set as Δtn, Δtn≦10 ms is satisfied.
摘要翻译：除尘装置包括振动板，压电元件，施加具有交流电压的压电元件的电源; 以及控制电路，其将压电元件包括第一和第二电极和压电材料的交变电压的频率从压电材料的第一晶相到第二结晶相的相变温度T为-40 °C≤T≤85℃，频率的变化用于重复从第一频率到第二频率的频率扫描操作，并且当在扫描操作期间产生可听见的振动的频率被设置为 fns，将可听振动结束的频率设定为fne，并且在扫描操作期间从fns到fne的改变时间被设置为Δtn，Δtn≤10ms。

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