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DESCRIPTION JP2011172049

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DESCRIPTION JP2011172049
[PROBLEMS] With the reduction in weight and size, a projector provided with a speaker in the
main body may or may not vibrate due to sound from the speaker. The former can suppress
vibration by lowering the volume, but the latter is meaningless even if the volume is reduced, and
only impairs the convenience of the user. An audio amplitude acquisition unit that measures the
amplitude of a volume output from a speaker, and a vibration detection unit that detects a
vibration of a projector apparatus as a change in acceleration, and the volume is reduced at the
time of vibration detection. Only when the reduction is confirmed, the processing to reduce the
volume is finalized. Thereby, the vibration at the time of projector projection is suppressed, and
the optimal volume setting for achieving the image quality deterioration prevention is realized.
[Selected figure] Figure 1
Projector device
[0001]
TECHNICAL FIELD The present invention relates to a projector device equipped with a speaker
on a main body and outputting audio from the speaker while projecting an image.
[0002]
Conventionally, with regard to a projector equipped with a speaker in the body, a technique etc.
has been proposed for temporarily reducing the volume during the operation in order to
eliminate the adverse effect of continuing to be exposed to a large volume when approaching the
body for operation. (Patent Document 1).
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1
[0003]
On the other hand, with the reduction in weight and size of projector devices accompanying
technological innovation, it has also been proposed to mount the projector on a small and
portable device such as a mobile phone and use it while holding it by hand (Patent Literature 2).
[0004]
On the other hand, as a technology to detect the cause of vibration and make a judgment, a
technology to measure vibration and volume with a vibration sensor and a sound collector and to
judge that there is a correlation between noise and vibration by exceeding a certain threshold It
exists (patent document 3).
[0005]
JP, 2009-100077, A JP, 2009-533951, A JP, 2002-131042, A
[0006]
In a projector apparatus in which a speaker is mounted on the main body, the speaker may cause
vibration to deteriorate the projection image quality.
In that case, the problem can be solved by taking measures to reduce the volume when the
vibration is detected.
However, the cause of the vibration may not be limited to the speaker.
For example, when using by hand as shown in Patent Document 2 and using the projector
apparatus in a place where the stability is poor, there is no effect to stop the vibration even if the
volume is lowered by detecting the vibration. In addition, even if there is no effect, a measure to
lower the volume is to be performed, which leads to a reduction in usability for the user.
In addition, when vibration due to the output sound from the speaker occurs, conventionally, the
user performs an operation of reducing the volume after estimating the volume that does not
cause vibration, and confirming the effect and adjusting it appropriately. It was necessary.
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2
This causes the user to perform an operation of volume reduction. Also, when reducing the
volume, it is often desirable to keep the volume reduction at a minimum, that is, to set it to the
maximum volume at which no vibration occurs. It was necessary to repeat trial and error by the
user in order to detect and set the maximum volume that does not occur. The present invention
evaluates the relationship between the time change of the sound amplitude output from the
speaker and the time change of the device vibration, and changes the volume when it is
determined that the correlation is seen between the two, so that the sound output from the
speaker is Only when the cause is vibration, it is possible to lower the volume or set the
maximum volume within the range where no correlation is observed.
[0007]
In order to solve the above-mentioned conventional problems, in the projector device according
to the present invention, there is provided an audio amplitude acquisition unit for acquiring
amplitude information of audio output before speaker output, and a vibration detection unit for
detecting acceleration due to vibration of the device at the time of projector projection. A
correlation calculation unit for correlating the amplitude information of the sound acquired from
the sound amplitude acquisition unit with the acceleration detected by the vibration detection
unit, a vibration information storage unit for storing data, and a speaker based on the sound
amplitude and vibration information A sound volume setting unit is provided to control the
sound volume, and the sound volume is reduced only when there is a correlation between the
sound amplitude and the time variation of the acceleration due to the vibration of the apparatus,
that is, when the sound volume is reduced. Also, when an instruction to increase the volume is
received, control is performed to increase the volume in the range where there is no correlation.
[0008]
As described above, according to the projector device of the present invention, the device is
vibrated due to the sound output of the main body, and the device is vibrated due to the cause
other than the sound output. It is possible to stop the unnecessary volume adjustment in the case
of the above, and to improve the convenience for the user.
[0009]
The block diagram of the projector apparatus in Embodiment 1 of this invention The flowchart
figure of the volume reduction process of the projector apparatus in Embodiment 1 of this
invention The flowchart figure of the volume increase process of the projector apparatus in
Embodiment 2 of this invention The block diagram of the projector apparatus in Embodiment 3
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The flowchart figure of the projector apparatus in Embodiment 3 of this invention The block
diagram of the projector apparatus in Embodiment 1, 2, 3 of this invention.
[0010]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
First Embodiment FIG. 1 is a block diagram of a projector device according to a first embodiment
of the present invention.
In the projector device, the image output unit 106 outputs the input image to the projection
plane through the projector unit 105. Further, the voice output unit 102 outputs a voice input
from the outside through the speaker 103. The output volume is changed by the volume setting
unit 101. Further, an acceleration sensor 110 is attached to the projector apparatus, and the
vibration detection unit 109 transmits acceleration fluctuation information. The audio amplitude
acquisition unit 104 measures and acquires the amplitude (intensity) information of the audio
signal output from the audio output unit before output from the speaker, and the acceleration
from the audio amplitude and vibration by the input from the vibration detection unit 109 And a
correlation calculation unit 107 that detects the correlation between the two, and controls the
volume setting of the volume setting unit 101. The vibration information used by the correlation
calculation unit is stored in the storage area 111 by the vibration information storage unit 108,
and read out again if necessary.
[0011]
FIG. 6 shows one example of the projector apparatus shown in FIG. 3Indicates a housing.
103,105And 110 are the same as in FIG. 33The control unit shown in FIG. 1 is a block including
therein 101, 102, 104, 106, 107, 108, 109, and 111 shown in FIG. In the present configuration
example, the speaker 103 is in contact with the installation surface 31 because of the restriction
of the housing 3, and the configuration is easily influenced by the output sound from the
speaker. In addition, a configuration may be adopted in which the ground contact surface is
provided with a convex portion 34 having elasticity and absorbing an impact.
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[0012]
FIG. 2 is a flowchart of the volume control of the projector device according to the first
embodiment. First, at the start of use of the projector, at the same time image projection is
performed in S101, sound output from the main body speaker is performed. Then, in S102, it is
determined whether the main body built-in speaker 103 is used. When the main body built-in
speaker 103 is not used, since the main body vibration is not generated by the audio output from
the speaker 103, the volume control is not performed. When the built-in speaker 103 is used, the
vibration amount, ie, acceleration of the main body of the projector device 1 detected by the
vibration detection unit 109 using the acceleration sensor 110 in S103, and the voice amplitude
information acquired from the voice output unit 102 The voice amplitude information and the
acceleration information are stored in the vibration information storage unit 108 while the voice
calculation unit 105 checks the voice amplitude information detected by the voice cardioversion
acquisition unit 104. When the detected acceleration exceeds the predetermined value in S104,
the correlation calculation unit 105 instructs the volume setting unit 101 to temporarily
decrease the volume by a predetermined value in S105. After that, in S106, the acceleration /
sound amplitude amount of the main body is acquired again. Thereafter, in S107, the correlation
calculation unit 105 confirms whether or not the audio amplitude is reduced, and if it is
determined that the amount of reduction is not sufficient, the volume is reduced again in S105. If
it is determined in S107 that the voice amplitude has decreased, the acceleration obtained from
the vibration detection unit 109 is compared with the time variation of the acceleration before
the volume decrease extracted from the vibration information storage unit 108. As a result, when
the acceleration of the projector apparatus main body is not reduced due to the volume
reduction, it is determined that the vibration factor of the projector apparatus 1 is not caused by
the audio output from the speaker 103, and before the volume reduction in S105 in S109.
Perform processing to return to volume. If the detected acceleration is reduced, it is determined
that the main body vibration amount is reduced with the volume reduction, and the process
returns to S104 to determine whether the reduced main body vibration amount is equal to or
more than a predetermined value. If it is less than the predetermined value, the processing is
ended with the volume at that time as the final setting volume, and if not, the processing after
S105 is performed again.
[0013]
As described above, according to the volume setting method of the projector apparatus described
in the first embodiment, the sound amplitude obtained by the sound amplitude acquisition unit
104 and the amount of vibration of the device itself detected by the vibration detection unit 109
change with the volume change. The correlation calculation unit 107 determines the case where
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both decrease, and it is possible to perform the volume reduction only in that case. Therefore, the
main body vibrates due to the sound output of the main body speaker 103, so that it is possible
to suppress the deterioration of the image quality of the image projected from the projector unit
105. Since it becomes possible to prevent an ineffective speaker volume reduction, the
convenience of the projector device is improved. Second Embodiment FIG. 3 is a flowchart of
volume control of a projector device according to a second embodiment. The configuration
diagrams are shown in FIG. 1 and FIG. First, when the user explicitly receives an instruction to
increase the volume to a certain volume, the volume is set (increased) to the instructed volume in
S201, and then the main speaker 103 is used in S202. Make sure. If the main body speaker 103
is not in use, the processing is terminated as it is. When the main body speaker 103 is used, an
audio amplitude acquisition unit using the acceleration of the main body of the projector device
1 detected by the vibration detection unit 109 using the acceleration sensor 110 in S203 and the
audio amplitude information acquired from the audio output unit 102 The speech amplitude
information and the acceleration information are stored in the vibration information storage unit
108 while the speech calculation unit 105 confirms the speech amplitude information detected
in the step 104. In S204, when the detected acceleration exceeds the acceleration before change,
the correlation calculation unit 105 instructs the volume setting unit 101 to temporarily
decrease the volume by a predetermined value in S205. Then, in S206, check whether the
volume after reduction is below the volume before the volume increase instruction, and if below
the volume before change, reduce the volume against the user's instruction. The process is
terminated at that point in order to prevent If the volume used before S201 is still higher than
the volume reduced in S205, the audio amplitude amount and the acceleration of the main body
are acquired from the audio amplitude acquisition unit 104 and the vibration detection unit 109
in S207. Thereafter, in S208, the correlation calculation unit 105 confirms whether or not the
audio amplitude is reduced, and if it is determined that the amount of reduction is not sufficient,
the volume is reduced again in S205. If it is determined in S208 that the sound amplitude has
decreased, the correlation calculation unit 105 determines whether the acceleration obtained
from the vibration detection unit 109 is equal to or less than the volume change.
If it is less than the predetermined value, the processing is ended with the volume at that time as
the final set volume, and if not, the processing after S205 is performed again.
[0014]
As described above, according to the volume setting method of the projector device described in
the second embodiment, when the volume increase instruction from the user is obtained, the
acceleration of the device itself detected by the vibration detection unit 109 has a value before
change. If the correlation calculation unit 107 determines that the main sound volume does not
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increase within the range of the sound volume set by the user and the sound volume before
change, it is possible to set the maximum sound volume. Therefore, the user can automatically
set the volume without affecting the projection image of the projector, and the convenience of
the projector device is improved. Third Embodiment FIG. 4 is a block diagram of a projector
device according to a third embodiment. The difference from FIG. 1 is in the configuration of the
vibration detection unit 109. In FIG. 1, the vibration detection unit is configured by the
acceleration sensor, but in FIG. 4, it is configured by the projection surface change amount
measurement unit 201 and the camera 202, and the projection surface is obtained using
projection image information obtained from the image output unit 106. Detect the shaking of the
[0015]
FIG. 6 shows one example of the projector apparatus shown in FIG. 3Indicates a housing.
103,105And 202 are the same as in FIG. 33The control unit shown in FIG. 4 is a block including
therein 101, 102, 104, 106, 107, 108, 109, and 201 shown in FIG. In the present configuration
example, the speaker 103 is in contact with the installation surface 31 because of the restriction
of the housing 3, and the configuration is easily influenced by the output sound from the
speaker. In addition, a configuration may be adopted in which the ground contact surface is
provided with a convex portion 34 having elasticity and absorbing an impact.
[0016]
FIG. 5 is a flowchart of the volume control of the projector device according to the third
embodiment. First, at the start of use of the projector, at the same time image projection is
performed in S301, sound output from the main body speaker is performed. Then, in S302, it is
determined whether the main body built-in speaker 103 is used. When the main body built-in
speaker 103 is not used, since the main body vibration is not generated by the audio output from
the speaker 103, the volume control is not performed. When the speaker 103 with a built-in
main body is used, the amount of vibration of the main body of the projector device 1 detected
by the vibration detection unit 109 using the image data input from the camera 202 and the
image output unit 106 in S403; The speech amplitude information detected by the speech
amplitude acquisition unit 104 using the speech amplitude information acquired from the image
is checked by the correlation calculation unit 105, and the speech amplitude information and the
projection plane change amount information are sent to the vibration information storage unit
108. save. In S404, when the detected vibration amount exceeds the predetermined value, in
S405, the correlation calculation unit 105 temporarily instructs the sound volume setting unit
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101 to lower the sound volume by a predetermined value. After that, the main body vibration
amount and the voice amplitude amount are reacquired in S406, and in S407, the correlation
calculation unit 105 confirms whether or not the voice amplitude decreases, and when it is
determined that the decrease amount is not sufficient The volume is reduced at S405. If it is
determined in S407 that the audio amplitude has decreased, the amount of vibration obtained
from the vibration detection unit 109 is compared with the amount of change with time of the
amount of vibration before the volume reduction extracted from the vibration information
storage unit 108. As a result, when the vibration amount of the projector apparatus main body is
not reduced along with the volume reduction, it is determined that the vibration factor of the
projector apparatus is not caused by the audio output from the speaker 103, and the volume
before the volume reduction in S405 in S409. Perform processing to return to volume. If the
detected vibration amount is reduced, it is determined that the main body vibration amount is
reduced with the volume reduction, and the process returns to S404 to determine whether the
reduced main body vibration amount is equal to or more than a predetermined value. If it is less
than the predetermined value, the processing is ended with the volume at that time as the final
set volume, and if not, the processing after S405 is performed again.
[0017]
As described above, according to the sound volume setting method of the projector apparatus
shown in the third embodiment, the vibration detection unit 109 including the sound amplitude
obtained by the sound amplitude acquisition unit 104 and the camera 202 and the projection
surface change amount measurement unit 201 detects The correlation calculation unit 107
determines the case where the vibration amount of the apparatus itself decreases with the
change of the sound volume, and it is possible to reduce the sound volume only in that case.
Therefore, the main body vibrates due to the sound output of the main body speaker 103, so that
it is possible to suppress the deterioration of the image quality of the image projected from the
projector unit 105. Since it becomes possible to prevent an ineffective speaker volume reduction,
the convenience of the projector device is improved.
[0018]
The projector apparatus according to the present invention is useful for all applications in which
a speaker for sound output is provided in a main body to project sound while outputting sound.
In particular, with the reduction in size and weight of the main body, the convenience can be
enhanced in a device that can not sufficiently cope with vibration suppression, and a projector
device that has both uses when used with a hand and when used as a stationary. Moreover, since
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it becomes realizable by using either an acceleration sensor or a camera apparatus which image |
photographs a projection surface to a projector housing | casing, an application range can be
extended.
[0019]
1,3 Casing 31 Ground plane 32 Projection plane 33 Control unit 34 Convex part 101 Volume
setting unit 102 Audio output unit 103 Speaker 104 Audio amplitude acquisition unit 105
Projector unit 106 Image output unit 107 Correlation calculation unit 108 Vibration information
storage unit 109 Vibration detection unit 110 Acceleration sensor 111 Vibration information
storage area 201 Projection surface change amount measurement unit 202 Camera
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