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DESCRIPTION JPS5669195

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DESCRIPTION JPS5669195
BRIEF DESCRIPTION OF THE DRAWINGS The drawing is a block diagram illustrating an
embodiment of the present invention. Reference Signs List 1 stereo device 4 mixer 5 low pass
filter 6 modulator 7 high frequency oscillator 9 ultrasonic wave transmitter 10 ultrasonic wave
Receiver, 12: Demodulator, 18: Vibration unit. 7フ
DETAILED DESCRIPTION OF THE INVENTION The present invention is a book relating to a
driving load for wirelessly (1) z0) driving of a vibration unit that generates a mechanical
sensation that can be felt by the body. Recently, in addition to the sound from the speaker, lowrange audio signals generate mechanical sensational vibration that does not turn into sound, and
while listening to the sound from the speaker with the ear, the sensational vibration
synchronized in front of the low frequency is generated with the skin Devices have been
developed to feel and enjoy music. Here, the vibration unit that generates mechanical bodily
sensation vibration vibrates the entire diaphragm by the mutual interference between the
electromagnetic force generated in the coil and the magnetic force of the permanent magnet
when the low-range audio current is applied, and the ear Japanese Patent Application No. 5358518, etc., discloses an application related to this vibration unit. Heretofore, in order to drive
the entire vibration unit, all audio signals have been transmitted from the stereo device to the
shooting unit in a wired manner. However, the propagation velocity of sound in the air is about
2.9 milliseconds per meter, for example, if the distance between the speaker and the listener is
15 meters apart, it is indeed 10 (2)-millisecond turtle time If a delay occurs and the sensational
vibration is also delayed by 10 milliseconds by some means, the sense of unity between the
speaker and the sensational vibration will be broken if it is not made. In order to solve this, it is
conceivable to provide a delay circuit, but in order to make the degree of delay variable
according to the distance between the speaker and the photographing unit, the delay circuit
becomes complicated, and a delay circuit is provided. It was impossible to make this time
difference consistent. In addition, since the audio signal is transmitted by the all-cable system, a
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code is present between the stereo device and the vibration unit K, and there is a problem that
the code is easily intertwined or a disconnection accident easily occurs. The present invention
solves the above-mentioned problems. The vibration unit 1) 1-drives an audio signal to be
modulated into an ultrasonic wave and transmitted, and a sound from a speaker and an
ultrasonic wave from an ultrasonic wave transmitter. The book is characterized in that (3)
integration of the sound from the speaker and the bodily sensation vibration from the imaging
unit is achieved by eliminating the time difference between the two. Hereinafter, embodiments of
the present invention will be described with reference to the drawings. The left and right
speakers λ5 are connected to the output side of the stereo device 1 as a + Fi sound source, and
the mixer 4 for mixing audio signals of the left and right channels is connected. A low pass filter
5 is connected to the output side of the mixer 4, and a modulator 6 is connected to the output
side of the low pass filter 5. Are modulated by the modulator 6 and output.
Here, the cutoff frequency ti 150 Hzm of the low pass filter 5. An ultrasonic wave transmitter 9 is
connected via an amplifier 8 to the output side of the modulator 6, and a modulation wave which
is electrical energy is an ultrasonic wave which is mechanical energy from the ultrasonic wave
transmitter 9. It is transmitted as Here, as the ultrasonic wave transmitter 9, an electrostrictive
vibrator, a high-pitched (4) three-piece force (lighter), an electrostrictive bimorph, or the like is
used. Here, although the signals from the stereo device were mixed by the mixer 4, the signals of
the left and right channels from the device 1 are respectively modulated to the ultrasonic waves
by the modulator 6 and transmitted independently as the ultrasonic waves. In this case, the audio
signals of the left and right channels transmitted on the receiving side may be mixed by the
mixer. Although the low pass filter 5 is provided, since the low pass filter 3 is provided on the
receiving side, it is not always necessary. Although the modulator 6 is used, it is preferable to
output the modulation wave by oscillating based on the output of the high frequency oscillator 7
and the all low pass filter 6. An ultrasonic wave receiver 10 converts the ultrasonic wave into a
full electric signal. As the ultrasonic wave receiver 10, an electrostrictive vibrator, a high sound
speaker (writer), an electrostrictive bimorph, or the like is used. A demodulator 12 is connected
to the ultrasonic wave receiver 10 via an amplifier 11, and a low-pass filter 5 of the previous
stage is connected to the output side of the (C /) controller 12 (5) °. The cutoff frequency of the
low pass filter 5 is about 150 parts. A limiting amplifier 15 as limiter means is connected to the
output side of the low-pass filter 3 and has a characteristic such that the output size is not
increased for an input greater than or equal to a fixed value and is limited to a fixed value. The
reference numeral 15 prevents the application of excessive power to the vibration unit 18.
Reference numeral 16 denotes a low pass filter in the latter stage, and the low pass filter 16
eliminates distortion at the corners when the waveform of the audio signal blocked by the
limiting amplifier 15 is rectangularized to correct distortion. The cutoff frequency of the low pass
filter 6 is about 150 H2. The power amplifier amplifies the signal from the 17 Fi low pass filter 6
and has a voltage gain of O dB. The circuit configuration after the demodulator 12 on the
receiving side is (6) ". It may be a book other than this, and it is assumed that a stereo system is
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used as a sound source, but a monophonic book may be used as a sound source. In this case, the
speaker 2.3 of the stereo device and the transmitter 9 are located on the same line X.
When the stereo device 1 is operated in this state, the speaker 2.5 is operated by the audio
signal. At the same time, the audio signals of the left and right channels are mixed by the mixer 4
and input to the low pass filter 5. The high frequency of the high frequency oscillator 7 is
modulated by the modulator 6 by the output signal from the low pass filter 5 and transmitted as
an ultrasonic wave from the transmitter 9. The ultrasonic wave received by the delivery device
10 is converted into an electric signal, the output signal of the low pass filter 5 is demodulated
by the demodulator 12, and the vibration unit 18 is driven based on this output signal. As
described above, since the present invention is transmitted as an audio signal tube ultrasonic
wave to be driven by the drive unit, it is shown that a phase shift occurs with the sound of the
speaker, and it is assumed that the distance is changed. )-'K11, ..., J1 Since the voice signal is
transmitted as an ultrasonic wave, it is convenient to adjust it without being beaten. Further,
since there is no cord between the stereo device and the photographing unit, an accident in
which the cord is entangled or broken does not occur and it is convenient for carrying.
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