(12) United States Patent
`Masahiko
`
`(10) Patent No.:
`(45) Date of Patent:
`
`US 8,917,486 B2
`Dec. 23, 2014
`
`USOO8917486B2
`
`(54) VIBRATION GENERATINGAPPARATUS
`
`(56)
`
`(75) Inventor: Miyazaki Masahiko, Ueda (JP)
`
`(73) Assignee: Nidec Seimitsu Corporation, Ueda-shi
`(JP)
`
`(*) Notice:
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 681 days.
`
`(21) Appl. No.: 13/190.783
`
`(22) Filed:
`
`Jul. 26, 2011
`
`(65)
`
`Prior Publication Data
`US 2012/OO25.742 A1
`Feb. 2, 2012
`
`(30)
`
`Foreign Application Priority Data
`
`Jul. 27, 2010
`Nov. 16, 2010
`Jul. 7, 2011
`
`(JP) ................................. 2010-167714
`(JP) ................................. 2010-255579
`(JP) ................................. 2011-150975
`
`(2006.01)
`(2006.01)
`(2006.01)
`(2006.01)
`(2006.01)
`
`(51) Int. Cl.
`H02H 7/09
`FI6M II/00
`B6B I/02
`HO2K33/6
`B6B I/04
`(52) U.S. Cl.
`CPC ............. H02K33/16 (2013.01); B06B 220I/30
`(2013.01); B06B I/0207 (2013.01); B06B
`220.1/70 (2013.01); B06B I/045 (2013.01)
`USPC ......................... 361/33: 267/136; 267/140.14
`(58) Field of Classification Search
`CPC ........... H02H 7/09; F16F 13/264; F16F 15/02
`See application file for complete search history.
`
`
`
`Fsin (cut)
`
`References Cited
`U.S. PATENT DOCUMENTS
`
`5,146,776 A * 9/1992 Twerdochlib et al. ......... T3,185
`5,931,285 A * 8/1999 Madsen et al. .........
`198.762
`6.257,063 B1* 7/2001 Uhlig .............................. 73/579
`6,323,943 B1 * 1 1/2001 Maruyama et al.
`356,285
`6,470,753 B2 * 10/2002 Maruyama ...
`73,657
`6,757,620 B1* 6/2004 Yoon et al. ...................... TO2/33
`6,843,128 B2 *
`1/2005 Chen et al. ...................... 73/574
`2001/00325 14 A1* 10/2001 Maruyama ...................... 73/657
`2005, 0126849 A1* 6/2005 Pearson et al. ................ 181,209
`2007/0241489 A1 * 10, 2007 Mizushima et al. ..... 267,140.14
`2009/0066.187 A1
`3/2009 Kudo ....................... 310,316.02
`
`
`
`FOREIGN PATENT DOCUMENTS
`
`6, 2008
`T 2006
`
`2008-521597 A1
`JP
`WO WO 2006/071449 A1
`* cited by examiner
`Primary Examiner — Eduardo Colon Santana
`Assistant Examiner — Gabriel Agared
`(74) Attorney, Agent, or Firm — Westerman, Hattori,
`Daniels & Adrian, LLP
`(57)
`ABSTRACT
`A vibration generating apparatus with high yield, low cost,
`and can exhibit vibration tactile haptic effects even with
`variation in the natural frequency of a mechanical vibrator,
`including a damping system having a damping ratio (<1 to
`Support a mechanical vibrator to a fastening part, and a mag
`netizing unit generating a dynamic magnetic field to vibrate
`the mechanical vibrator by non-contact, the mechanical
`vibrator generating a beat vibration by making the frequency
`ofa drive Voltage applied to the magnetizing unit, from a drive
`start or middle of drive, to be a non-resonant frequency out of
`a damped natural frequency of the mechanical vibrator,
`wherein the apparatus comprises a forced vibration control
`unit controlling to stop application of the drive Voltage, in a
`beat wave defining an amplitude of the beat vibration, at a
`second valley part after a first peak part from the side of the
`drive start.
`
`11 Claims, 46 Drawing Sheets
`
`
`
`FORCED VERATION
`CORTRCL UNIT
`
`Exhibit 1014 - Page 1 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 1 of 46
`
`US 8,917,486 B2
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`Exhibit 1014 - Page 2 of 65
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`

`

`U.S. Patent
`U.S. Patent
`
`Dec. 23, 2014
`Dec. 23, 2014
`
`Sheet 2 of 46
`Sheet 2 of 46
`
`US 8,917,486 B2
`US 8,917,486 B2
`
`
`
`2A
`
`FIG.
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`
`2B
`
`Exhibit 1014 - Page 3 of 65
`
`Exhibit 1014 - Page 3 of 65
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`

`

`U.S. Patent
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`Dec. 23, 2014
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`Sheet 3 of 46
`
`US 8,917,486 B2
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`Exhibit 1014 - Page 6 of 65
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`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 6 of 46
`
`US 8.917486 B2
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`Exhibit 1014 - Page 7 of 65
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`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 7 of 46
`
`US 8,917,486 B2
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`TRANSITION STATE
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`(SEC}
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`F=196. 25Hz
`
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`Load voltage
`~~ —— Resonance fregency
`Total Ererey
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`Exhibit 1014 - Page 8 of 65
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`

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`US 8,917,486 B2
`
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`Exhibit 1014 - Page 9 of 65
`
`

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`FIG.
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`DRIVE VOLTAGE: 2.5 CYCLES 100% 2.5 CYCLES abs
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`Exhibit 1014 - Page 10 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 10 of 46
`
`US 8,917,486 B2
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`Exhibit 1014 - Page 11 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 11 of 46
`
`US 8,917,486 B2
`
`9 0
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`Exhibit 1014 - Page 12 of 65
`
`

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`DRIVEVOLTAGE(Volt)
`
`
`DISPLACEMENT
`
`(mm)
`
`FIG. 12
`
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`DN | f=130. 83Hz
`UP;
`staheees DISPLACEMENT:
`5 CYCLES 5V
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`Exhibit 1014 - Page 13 of 65
`
`

`

`FIG. 13
`
`f=130. 83Hz
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`corse ENERGY:
`5 CYCLES 5V
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`SNERGY: 2.5 CYCLES 5V 2.5 CYCLES 3.6V
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`Exhibit 1014 - Page 14 of 65
`
`

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`f=130. 83Hz
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`| tree ENERGY:
`5 CYCLES 5V
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`Exhibit 1014 - Page 15 of 65
`
`

`

`f=196. 25Hz
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`Exhibit 1014 - Page 16 of 65
`
`

`

`
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`Exhibit 1014 - Page 17 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 17 of 46
`
`US 8,917,486 B2
`
`FIG. 17 A
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`Exhibit 1014 - Page 18 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 18 of 46
`
`US 8,917.486 B2
`
`0.00002 -- - - - - -------------|--|-- 0.5
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`Exhibit 1014 - Page 19 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 19 of 46
`
`US 8,917.486 B2
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`
`Exhibit 1014 - Page 20 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 20 of 46
`
`US 8,917,486 B2
`
`FIG. 2 OA
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`Exhibit 1014 - Page 21 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 21 of 46
`
`US 8,917,486 B2
`
`FIG. 21A
`
`10
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`Exhibit 1014 - Page 22 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 22 of 46
`
`US 8,917,486 B2
`
`FIG. 22A
`
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`t
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`0.012
`
`Exhibit 1014 - Page 23 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 23 of 46
`
`US 8,917,486 B2
`
`FIG. 23A
`f = fo/3
`
`"fo
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`
`Exhibit 1014 - Page 24 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 24 of 46
`
`US 8,917,486 B2
`
`FIG. 24
`
`
`
`o
`g
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`
`Exhibit 1014 - Page 25 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 25 of 46
`
`US 8,917,486 B2
`
`FIG. 25A
`
`5
`
`O
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`t
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`
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`0.02
`
`Exhibit 1014 - Page 26 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 26 of 46
`
`US 8,917,486 B2
`
`FIG. 26A
`
`o
`N g
`
`-
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`C)
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`
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`
`0.01
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`
`Exhibit 1014 - Page 27 of 65
`
`

`

`U.S. Patent
`
`(Volt)
`
`
`
`DRIVEVOLTAGE
`
`yuayed“SN
`
`
`P07‘EZ99
`OPJOLZOOS
`7H98P°L16'8SA
`
`196.25Hz
`
`FIG. 27
`
`
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`= Pt Ns
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`0.015
`Time(sec)
`
`0.025
`
`0.03
`
`Exhibit 1014 - Page 28 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 28 of 46
`
`US 8.917486 B2
`
`(). LOA)
`
`HEWITOA, HATO
`
`
`
`
`• • •
`
`• • •
`
`
`
`
`(uTuI)
`
`LNHNHOWId SICI
`
`Exhibit 1014 - Page 29 of 65
`
`

`

`130.83Hz
`
`V ( : )
`
`
`
`0.00008
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`VOLTAGE: 130.83Hz
`yaa} ee
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`DRIVEVOLTAGE
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`
`Exhibit 1014 - Page 30 of 65
`
`

`

`(Volt)
`
`
`
`DRIVEVOLTAGE
`
`yuazed‘S'N
`
`
`P07‘EZ99
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`7H98P°L16'8SA
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`130.83Hz
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`
`DISPLACEMENT: 130.83Hz
`DISPLACEMENT: 130.83Hz 100% 60%
`DRIVE VOLTAGE: 130.83Hz 100% 60%
`= DRIVE VOLTAGE 130.83Hz
`
`
`
`t
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`0
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`
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`
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`
`(mm)
`
`
`
`
`
` DISPLACEMENT
`
`Exhibit 1014 - Page 31 of 65
`
`

`

`
`
`RESONANCE|NON-RESONANCE FIG. 31
`
`157Hz
`
`1 CYCLE
`
`188Hz
`5 CYCLES
`
`vib)
`
`Z7
`
`Energy(kgm2/52)
`
`0.0005
`
`0.00045
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`0.00035
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`
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`
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`
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`
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`
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`
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`
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`
`yuajed‘S70
`
`P07‘€Z90
`OFJO[EeJOYS
`7H98P°L16'8SA
`
`Exhibit 1014 - Page 32 of 65
`
`

`

`FIG. 32
`
`DRIVE FREQUENCY:
`
`157Hz 1 CYCLE ~ 188Hz 5 CYCLES
`
`RESONANCE
`
`NON-RI
`ESONANCE
`
`0.5
`
`-0.5
`
`(m/s}
`VELOCITY
`
`0.01
`
`0.02
`
`0.03
`
`0.04
`
`0.06
`
`Time(sec)
`
`Energy(kgm?/$2)
`
`0.0005
`
`0.00045
`
`0.0004
`
`0.00035
`
`0.0003
`
`0.00025
`
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`
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`0.0001
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`
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`
`0
`
`yuajed‘S70
`
`
`P07‘EZ99
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`7H98P°L16'8SA
`
`Exhibit 1014 - Page 33 of 65
`
`

`

`FIG. 33
`
`a
`
`DRIVE FREQUENCY: 157Hz 1 CYCLE - 188Hz 5 CYCLES
`
`NON-RESONANCE
`
`0.01
`
`0.02
`
`0.03
`
`0.04
`
`0.05
`
`0.06
`
`Time(sec)
`
`Energy(kgm2/§2)
`
`0.0004
`
`0.00035
`
`0.0003
`
`0.00025
`
`0.0002
`
`0.00015
`
`0.0001
`
`0.00005
`
`0
`
`(G)
`
`ACCELERATION
`
`
`
`yuajed‘S70
`
`
`P07‘EZ99
`OPJOCEJOOS
`7H98P°L16'8SA
`
`Exhibit 1014 - Page 34 of 65
`
`

`

`yuajed‘S70
`
`
`P07‘EZ99
`OFJOHEJOYS
`7H98P°L16'8SA
`
`|
`
`So onmorn)
`
`|
`
`—
`
`( D
`
`ISPLACEMENT
`
`157Hz 1 CYCLE - 188Hz 5 CYCLES
`
`23
`0 7,42 0.01
`
`0.03
`
`0.04
`
`0.05
`
`0.06
`
`Time(sec)
`
`FIG. 34
`
`DRIVE FREQUENCY:
`
`X
`
`RESONANCE
`
`
`
` ESONANCE
`
`
`
`
`
`Energy(kgm2/s2)
`
`0.0005
`
`0.00045
`
`0.0004
`
`0.00035
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`0.0003
`
`0.00025
`
`0.0002
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`0.00015
`
`0.0001
`
`0.00005
`
`0
`
`Exhibit 1014 - Page 35 of 65
`
`

`

`U.S. Patent
`
`US 8,917,486 B2
`
`1:0
`600 30 O LO O 900
`G00
`w00
`000 Z0 0 1000
`
`(S/ zuay)ABueu
`
`Exhibit 1014 - Page 36 of 65
`
`

`

`
`
`
`wee eee ee ee ed
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`0.00050
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`
`(mon)
`
`DISPLACEMENT
`
`yuajed‘S70
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`
`P07‘EZ99
`OPJOO¢JOOS
`7H98P°L16'8SA
`
`Exhibit 1014 - Page 37 of 65
`
`

`

`U.S. Patent
`
`US 8,917,486 B2
`
`yuajed‘S70
`
`
`P07‘EZ99
`OPJOLeWOOHS
`7H98P°L16'8SA
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`FIG. 37
`
`
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`+ 0.900
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`(2)
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`XIV
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`(d LS L/ .3TTWA. CIN&
`
`vee
`
`1.000
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`NUMBER OF CYCLES
`
`
`
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`NX
`- ~ = 2ND VALLEY/1ST PEAK (4)
`—
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`180.0
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`
`200.0
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`205.0
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`7 0.100
`
`0.000
`215.0
`
`.
`210.0
`
`Exhibit 1014 - Page 38 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 38 of 46
`
`US 8,917,486 B2
`
`OO
`(Y)
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`
`Exhibit 1014 - Page 39 of 65
`
`

`

`(V)
`
`
`
`DRIVEVOLTAGE
`
`
`
`4.0
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`Le 75
`
`V(t)
`
`E&
`
`0.00050
`S 0.00045
`® 0.00040
`0.00035
`
`0.00030
`
`0.00025
`
`0.00020
`
`0.00015
`
`0.00010
`
`0.00005
`
`0.00000
`
`
`
`0.03
`
`Time(sec)
`
`DNi1
`
`0.04
`
`0.05
`
`0.06
`
`
`
`RESONANCE
`
`
`
`NON-RESONANCE
`
`80
`FIG. 39
`
`157Hz|122Hz .
`1 CYCLE
`3 CYCLES
`6.0
`
`
`
`Exhibit 1014 - Page 40 of 65
`
`

`

`FIG. 40
`
`DRIVE FREQUENCY:
`
`i
`Cy
`
`157Hz 1 CYCLE
`
`- 122Hz 3 CYCLES
`
`Vv
`
` ESONANCE
`RESONANCH NON~RI]
`
`
`
`0.00
`
`0.01
`
`0.02
`
`0.03
`
`0.04
`
`0.05
`
`0.06
`
`Time(sec)
`
`
`
`(kem2/s2)
`
`0.00050
`> 0.00045
`Ener
`0.00040
`
`0.00035
`
`0.00030
`
`0.00025
`
`0.00020
`
`0.00015
`
`0.00010
`
`0.00005
`
`0.00000
`
`0.50
`
`0.00
`
`—-0.50
`
`-1.00
`
`{m/s}
`VELOCITY
`
`yuajed‘S70
`
`
`P07‘EZ99
`OFJOOFJOYS
`7H98P°L16'8SA
`
`Exhibit 1014 - Page 41 of 65
`
`

`

`FIG.
`
`Al
`
`DRIVE FREQUENCY:
`
`157Hz 1 CYCLE - 122Hz 3 CYCLES
`
`ry
`
`NON-RESONANCE
`
`Energy(kgm2/s2)
`
`0.00050
`
`0.00045
`
`0.00040
`
`0.00035
`
`0.00030
`
`0.00025
`
`0.00020
`
`0.00015
`
`0.00010
`
`0.00005
`
`0.00000
`
`0.01
`
`0.02
`
`0.03
`
`0.04
`
`0.05
`
`0.06
`
`Time(sec)
`
`1.00
`
`0.00
`
`~0.50
`
`-1.00
`
`(G)
`
`ACCELERATION
`
`
`
`yuajed‘S70
`
`
`P07‘EZ99
`OFJO[phJOYS
`7H98P°L16'8SA
`
`Exhibit 1014 - Page 42 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 42 of 46
`
`US 8,917,486 B2
`
`(JUI) LN
`
`NHOWIdSIO
`
`0G 0
`
`
`
`
`X
`
`THONT, NO STIH -- NION
`©NVNOS?,
`
`(S/ u?y)Asieu
`
`Exhibit 1014 - Page 43 of 65
`
`

`

`3RD VALLE
`
`Energy(kgm2/s2)
`
`0.00050
`
`0.00045
`
`0.00040
`
`0.00035
`
`0.00030
`
`0.00025
`
`0.00020
`
`0.00015
`
`0.00010
`
`0.00005
`
`0.00000
`
`NON-RESONANCE
`
`iST PEAK
`
`FIG. 43
`
`
`
`
`
`
`
`0.01
`
`0.02
`
`003
`
`0.04
`
`0.05
`
`0.06
`
`Time(sec)
`
`yuajed‘S70
`
`
`P07‘EZ99
`OFJOEPJOYS
`7H98P°L16'8SA
`
`(mam)
`
` DISPLACEMENT
`
`Exhibit 1014 - Page 44 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 44 of 46
`
`US 8,917,486 B2
`
`
`
`
`(URI)
`
`HAV IdSICI
`
`( Zs/ u?y)Agueud
`
`Exhibit 1014 - Page 45 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 45 of 46
`
`US 8,917,486 B2
`
`(ZH)
`
`JonnOHI, CIHI 'Idd\l LNWNOS
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`
`Exhibit 1014 - Page 46 of 65
`
`

`

`U.S. Patent
`
`Dec. 23, 2014
`
`Sheet 46 of 46
`
`US 8,917,486 B2
`
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`Exhibit 1014 - Page 47 of 65
`
`

`

`US 8,917,486 B2
`
`1.
`VIBRATION GENERATINGAPPARATUS
`
`CROSS-REFERENCE TO RELATED
`APPLICATION
`
`This application is based upon and claims the benefit of
`priority of the prior Japanese Patent Application No. 2010
`167714 filed on Jul. 27, 2010, the prior Japanese Patent Appli
`cation No. 2010-255579 filed on Nov. 16, 2010 and the prior
`Japanese Patent Application No. 2011-150975 filed on Jul. 7,
`2011, the entire contents of which are incorporated herein by
`reference.
`
`BACKGROUND OF THE INVENTION
`
`10
`
`15
`
`2
`with respect to a fastening part through a spring element, and
`a magnetizing unit generating a dynamic magnetic field to
`vibrate the mechanical vibrator by non-contact, the mechani
`cal vibrator generating a beat vibration by making the fre
`quency “f of a drive Voltage applied to the magnetizing unit,
`from a drive start or middle of drive, to be a non-resonant
`frequency out of a damped natural frequency “f of the
`mechanical vibrator, wherein: the vibration generating appa
`ratus comprises a forced vibration control unit controlling to
`stop application of the drive Voltage, in a beat wave defining
`an amplitude of the beat vibration, at a second valley part after
`a first peak part from the side of the drive start.
`In this way, the present invention is a device accompanied
`with generation of a beat vibration, so after the first peak part
`in which the vibration strengthens, a second valley part where
`the vibration weakens naturally arrives. The forced vibration
`control unit controls the stopping of application of drive Volt
`age in the second Valley part, so even without the natural
`damping time becoming longer, the sharpness of stopping the
`vibration can be improved and the vibration tactile haptic
`effects can be sufficiently exhibited. A beat vibration occurs
`with a drive Voltage of the non-resonant frequency. So even if
`there is considerable variation in the natural frequency of the
`mechanical vibrator, this causes no problems and therefore it
`is possible to provide a high yield, low cost vibration gener
`ating apparatus. Further, the frequency “f of the drive voltage
`may be a frequency lower than or a frequency higher than the
`damped natural frequency “f”. Further, the number of cycles
`of the frequency of the drive voltage can be selected to be
`larger or Smaller, so even with the instantaneous vibration of
`the vibration tactile haptic effects, diversification of the
`modes of vibration and in turn coding such as Morse coding
`in accordance with the modes of vibration becomes possible.
`The forced vibration control unit preferably suppresses
`amplitude of the drive Voltage before stopping application of
`the drive voltage at the second valley part. It is possible to
`weaken the excitation action in the excitation period in the
`damping dominant period from the first peak part to the
`second Valley part, so as a result the damping action becomes
`relatively strong and the sharpness of the stopping of the
`vibration becomes even better. From another viewpoint, the
`forced vibration control unit preferably suppresses the ampli
`tude of the drive Voltage in the damping dominant period from
`the first peak part to the second valley part compared with the
`amplitude of the drive Voltage in the excitation dominant
`period from the first valley part to the first peak part at the
`vibration start side.
`The drive Voltage which is applied to the magnetizing unit
`may be a sine wave, alternating square wave, or other bipolar
`waveform which swings from the Zero level to positive or
`negative, but may also be a repeated waveform of a unipolar
`Voltage which Swings between the Zero level and positive and
`between the Zero level and negative. In a unipolar waveform
`drive, the amplitude Zero periods are periodically applied, so
`from the first peak part to the second valley part, a natural
`damping period of the damping ratio
`is also added as a
`damping action and the sharpness of stopping of vibration
`becomes better. Further, with a unipolar waveform drive,
`compared with a bipolar waveform drive, the power source
`Voltage is used at a single pole side and the Voltage amplitude
`can be doubled, so it is possible to increase the power in the
`excitation dominant period up to the first peak part.
`If considering the ultimate limits of the beat vibration
`phenomenon, when the forced vibration control unit sets the
`frequency of the drive voltage so that the beat period of the
`beat wave of the beat vibration and the period of the basic
`wave of the beat vibration become substantially equal, a
`
`1. Field of the Invention
`The present invention relates to a vibration generating
`apparatus which can be built into a mobile phone, touch
`panel, or other device, more particularly relates to a vibration
`generating apparatus which exhibits a vibration tactile haptic
`effects of instantaneous vibration.
`2. Description of the Related Art
`A vibration generating apparatus giving the vibration tac
`tile haptic effects disclosed in Japanese Patent Publication
`(A) No. 2008-521597 employs a resonant forced vibration
`system. A signal generator generates an excitation use actua
`tor signal of a first frequency the same as the natural fre
`quency of the resonance actuator and excites the resonance
`actuator in the resonance state so as to sharply increase the
`acceleration instantaneously. After this, the signal generator
`generates a damping use actuator signal of a second fre
`quency shifted from the first frequency by a 180 degree phase
`(waveform inverted) and dampens the resonance actuator to
`cause instantaneously damping.
`As related art, there is Japanese Patent Publication (A) No.
`2008-521597 (0.033, FIG. 1).
`The above resonance actuator is made to operate in a reso
`nance mode using a forced vibration frequency the same as its
`natural frequency (resonant frequency), so while instanta
`neous excitation is easy in the excitation process which rap
`idly increases the acceleration, in the damping process for
`damping the once high acceleration resonance actuator, since
`the resonance actuator will have quite of a bit of variation in
`natural frequency for each specimen, even if the phase of the
`damping use actuator signal completely shifts by 180 degrees
`from the excitation use actuator signal, in reality there is no
`guarantee of a complete 180 degree shift with respect to the
`phase of the vibration and displacement of the resonance
`actuator. Due to this advanced phase difference or retarded
`phase difference which occurs unavoidably due to variations
`in the natural frequency, depending on the timing of the end of
`application of the damping use actuator signal, incomplete
`stopping of the mechanical vibrator or restart after stopping
`will be induced, so the free damping period remains longer
`until entering the insensitive Zone and the sharpness of the
`damping becomes poor.
`
`25
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`SUMMARY OF THE INVENTION
`
`The present invention was made to solve the above prob
`lem and has as its object the provision of a vibration gener
`ating apparatus which can exhibit a vibration tactile haptic
`effects with a good feel of damping of the mechanical vibra
`tOr.
`According to the present invention, there is provided a
`vibration generating apparatus including a damping system
`having a damping ratio ~1 to support a mechanical vibrator
`
`60
`
`65
`
`Exhibit 1014 - Page 48 of 65
`
`

`

`10
`
`25
`
`30
`
`35
`
`40
`
`45
`
`3
`biased vibration phenomenon occurs in which acceleration
`strong in one direction (biased acceleration) is manifested.
`As an extreme mode of f <f, it is possible to make the
`frequency “f” is substantially 3 times the damped natural
`frequency “f” and where the drive voltage which is applied to
`the magnetizing unit is an independent wave comprised of a
`first sine half wave, a second sine half wave of an opposite
`phase to the first sine half wave, and a third sine half wave of
`an opposite phase to the second sine half wave. It is possible
`to generate vibration having a remarkable biased acceleration
`in the displacement direction occurring by the second sine
`half wave and to provide a perceptive vibrating device which
`has a one-direction indicating property and a vector property.
`To make this effect more pronounced, the frequency of the
`first sine half wave and the third sine half wave is made not
`15
`more than 3 times the damped natural frequency f. Con
`versely, it is preferable to make the frequency of the second
`sine half wave at least 3 times the damped natural frequency
`f, and possible, further, to make the waveheight value of the
`second sine half wave at least the waveheight values of the
`first sine half wave and third sine half wave.
`Conversely, as an extreme mode of falf, it is preferable to
`make the frequency “f” substantially /3 of the damped natural
`frequency f. and to make the drive Voltage which is applied to
`the magnetizing unit a sine half wave. In this case as well, it
`is possible to provide a perceptive vibration device which has
`a one-direction indicating property or vector property.
`In this regard, the above vibration generating apparatus is a
`beat vibration generating apparatus from the start, so in the
`excitation dominant period from the drive start to the first
`peak part, an excitation period and a damping period alter
`nately appear, so the startup power becomes insufficient com
`pared with a resonance system by the amount of inclusion of
`the damping periods. Therefore, the forced vibration control
`unit is characterized by not making the frequency of the drive
`signal a non-resonant frequency from the drive start. It first
`makes the frequency of the drive Voltage a resonant frequency
`matching the damped natural frequency and Switches to a
`non-resonant frequency after a certain period. Evenifadamp
`ing system, a certain period from drive start becomes a reso
`nance state. After acceleration reliably increases, a non-reso
`nant beat vibration is switched to. After an excitation
`dominant period in which an excitation period and damping
`period are alternately repeated, a first peak part is reached,
`then a damping dominant period in which a damping period
`and excitation period are repeated is entered and a second
`valley part is reached whereupon the device stops. Since this
`is a resonance system before a non-resonance system, the
`startup power can be sufficiently secured. Further, after the
`beat vibration is switched to, the first peak part automatically
`arrives. There is also a limit effect which can Suppress exces
`sive vibration amplitude. It is therefore possible to prevent
`breakdown of the mechanical vibrator.
`In the initial drive period, resonant drive is given priority to
`So as to suppress energy loss and speed the startup of vibra
`tion, but if this resonant vibration is too long, even if the
`vibration switches to non-resonant vibration then falls to the
`second valley part, the energy obtained by resonant vibration
`remains and Zero ends up being greatly deviated from. To
`prevent this, it is preferable to make the number of cycles of
`the damped natural frequency (resonant frequency) Smaller
`than the number of cycles of the non-resonant frequency. It is
`possible to Suppress separation of the second Valley part from
`Zero and possible to ensure sharpness in stopping of vibration.
`In a vibration generating apparatus compatible with the
`above vibration mode of a vibration generating apparatus, the
`mechanical vibrator has a ring-shaped permanent magnet
`
`US 8,917,486 B2
`
`4
`which is magnetized in a thickness direction spanning a first
`end face and a second end face, the spring element is a
`Suspension spring unit for Supporting the ring-shaped perma
`nent magnet displaceably in the thickness direction with
`respect to the fastening part