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DESCRIPTION JP2014160133

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DESCRIPTION JP2014160133
Abstract: A projection device capable of projecting an image and outputting a sound, and capable
of automatically and appropriately performing volume setting of sound according to an
environment to be used. The projector 100 receives an image signal and an audio signal, forms
an image according to the input image signal, projects the image on the screen 201, and outputs
an audio according to the input audio signal. The distance measuring sensor 114 is provided to
obtain the value of the distance between the screen 201 and the projector 100. Further, a sound
volume setting unit configured of the control unit 104 and the sound processing unit 112 for
setting the sound volume level of the sound to be output according to the value of the distance
acquired by the distance measurement sensor 114 is also provided. [Selected figure] Figure 1
Projection device, volume setting method for projection device, and projection system
[0001]
According to the present invention, an image input means for inputting a signal of an image or
video (hereinafter referred to as an image signal) to be projected onto a projection target
(hereinafter referred to as an image signal) and an audio input for inputting an audio signal of
audio output from audio output means And a projection device. The present invention also
relates to a method of setting the volume of the projection device, and a projection system
including the projection device.
[0002]
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1
A projection apparatus such as a projector that forms an image according to an image signal
input by an image input unit and projects the image on a projection target such as a screen can
project an image of a large screen conventionally, viewing a movie, presentation, It is used for
educational purposes. Further, there are many requests for outputting sound from the projection
device for use in movie viewing, presentation, education, etc., and there are an increasing number
of projectors incorporating sound output means such as speakers for outputting sound.
[0003]
As the brightness of the projection device becomes brighter, the opportunity to be used in a large
conference room increases, and it is desirable to increase the volume of the sound output from
the built-in speaker. With regard to sound volume setting for audio, there has conventionally
been known a configuration in which a volume setting value is selected by menu operation or the
like, and audio of the set volume is output from a speaker immediately after activation.
[0004]
For example, Patent Document 1 describes a projection device that sets the volume of sound
output from a speaker according to the position of a focus lens or zoom lens that constitutes an
image projection means.
[0005]
However, in the conventional projection apparatus, since the volume setting of the sound
according to the environment to be used is not performed automatically, there existed the
following problems.
If you once set the volume setting to a high volume for use in a large conference room etc. and
then stop using the projection device without changing the volume setting, change the volume
setting the next time you use it in a narrow conference room etc. Instead, the audio output is
performed from the speaker with the volume setting of the high volume. As a result, there is the
problem of making the audience uncomfortable. In addition, there is also a problem that it takes
time and effort for the user to adjust the volume to a low level after audio output at a large
volume.
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[0006]
Conversely, if the volume setting is set to a small volume for use in a narrow meeting room, etc.
and the projection device is not used without changing the setting, change the volume setting
next time it is used in a large meeting room etc. Instead, the audio output is performed from the
speaker with the volume set to small. As a result, there is a problem that the audience can not
hear the outputted voice. In addition, there is also a problem that it takes time and effort for the
user to adjust the volume to a high level after audio output at a small volume.
[0007]
In addition, even with the projection device described in Patent Document 1, if the position
adjustment of the focus lens and the zoom lens is not properly performed before outputting the
sound, the volume setting of the sound according to the environment to be used can not be
appropriately performed. Audio output is performed at a large volume, or audio output is
performed at a small volume. As a result, there is a problem that the audience feels
uncomfortable, the voice can not be heard by the audience, and it takes time for the user to
adjust the volume properly.
[0008]
The present invention has been made in view of the above problems, and an object thereof is a
projection device capable of projecting an image and outputting a voice from a voice output
means, and setting the volume of the voice according to the use environment. Is to provide a
projection device that can be properly and automatically performed.
[0009]
In order to achieve the above object, the invention according to claim 1 comprises an image
input means for inputting an image signal of an image to be projected onto a projection target,
and an audio input means for inputting an audio signal of audio outputted from an audio output
means. A distance obtaining means for obtaining a value of the distance between the projection
object and the projection device, and output from the sound output means according to the value
of the distance obtained by the distance obtaining means. And sound volume setting means for
setting the sound volume of the sound.
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[0010]
Since the present invention comprises the distance acquisition means and the volume setting
means, according to the value of the distance between the projection object acquired by the
distance acquisition means and the projection apparatus, the sound output of the speaker etc. It
is possible to automatically set the volume of the sound to be output by means.
Therefore, even if the volume setting is not changed when the environment to be used changes,
or the position adjustment of the focus lens or the zoom lens is not properly performed until the
sound output as in the projection device of Patent Document 1, You can automatically set the
volume of the sound that suits your environment.
[0011]
The present invention is a projection device capable of projecting an image and outputting sound
from a sound output means, and can provide a projection device capable of automatically and
appropriately setting the volume of sound according to the environment of use.
[0012]
FIG. 1 is a schematic configuration diagram of a projector according to an embodiment.
Explanatory drawing about the method to measure the distance to a projector and a screen.
The flow figure of the example of the flow from the time the power supply of the projector is
turned on until the sound is outputted from the speaker. Explanatory drawing about the table
which determines volume setting value.
[0013]
Hereinafter, an embodiment in which the present invention is applied to a projector (hereinafter,
referred to as a projector 100) which is a projection device capable of projecting an image and
outputting a sound will be described with reference to the drawings. FIG. 1 is a schematic
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configuration diagram of a projector 100 according to the present embodiment, and FIG. 2 is an
explanatory diagram of a method of measuring the distance between the projector 100 and the
screen 201. FIG. 3 is a flow diagram of an example of a flow from when the projector 100 is
turned on to when sound is output from the speaker. FIG. 4 is an explanatory diagram of a table
for determining the volume setting value, in which (a) is a projection size table for guiding the
projection size, and (b) is a volume setting table for guiding the volume setting value.
[0014]
As shown in FIG. 1, the projector 100 converts an image or video (hereinafter referred to as an
image) signal (hereinafter referred to as an image signal) and an audio signal input to an image
input terminal of an input / output terminal 101 which is an image input unit. In response, the
image is enlarged and projected onto the screen 201 to be projected. The input image signal is
an image signal such as a PC image or a DVD image input from an external device such as a
personal computer or a DVD reproduction device connected to the image input terminal of the
input / output terminal 101. Also, an audio signal input from the same external device connected
to the audio input terminal of the input / output terminal 101, which is an audio input means, as
the external device connected to the image input terminal, or another external device such as an
audio reproduction device It outputs from the speaker 113 which is an audio | voice output
means with which the apparatus main body was equipped.
[0015]
The projector 100 includes an image signal processing unit 102, a scaler 103, a control unit
(CPU) 104, a memory 105, an operation unit 106, a drive circuit 107, a display element 108, a
light source 109, and a projection optical system 110. In addition, an audio processing unit 112
that processes the input audio, and a speaker 113 are also provided, and the audio can be output
to the outside. The distance measurement sensor 114 is also a distance acquisition unit that
acquires the value of the distance between the projector 100, which is a projection device to be
described later, and the screen 201, which is a projection target.
[0016]
The image signal processing unit 102 receives an image signal from an external device input
from an image input terminal of the input / output terminal 101, and converts the image signal
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into an image digital signal that can be received by the scaler 103. The image digital signal
output from the image signal processing unit 102 is input to the scaler 103, and the number of
vertical and horizontal pixels is determined from the content of the image digital signal. Then,
scaling is automatically performed so that the input image can be optimally displayed with
respect to the aspect ratio of the output pixel number of the projector 100.
[0017]
The control unit 104 is configured by a microcontroller (microcomputer), and includes an
arithmetic circuit such as a CPU (central processing unit), a ROM (read only memory), a RAM
(random access memory), and a memory circuit. Then, the control unit 104 performs general
control of the projector 100 and performs control for performing various settings and
comparisons. The sound processing unit 112 performs sound quality setting and the like while
controlling the sound quality of the sound signal input from the sound input terminal of the input
/ output terminal 101 under the control of the control unit 104 based on the setting value etc.
The volume setting is performed, and the speaker 113 is driven to output an audio. Here,
according to the value of the distance between the projector 100 and the screen 201 acquired by
the distance measuring sensor 114, the control unit 104 and the audio processing mainly
perform volume setting means for setting the volume of the audio output from the speaker 113.
It consists of a part 112. In addition, each value defined in a projection size table and a volume
setting table described later is stored in the ROM of the control unit 104.
[0018]
The memory 105 is configured by a non-volatile memory or the like that stores the content set
by the control unit 104, and the previous setting content (such as language setting) is saved even
after the projector 100 is turned off. The operation unit 106 is configured of a key input unit on
the operation panel of the apparatus main body of the projector 100 or a key input unit of a
remote control transmitter, and, for example, a menu screen for performing various settings and
selections of the projector 100 It has a menu key to be displayed. Further, it is also connected to
a distance measuring sensor 114 which is a distance acquiring unit for performing distance
measurement with the screen 201, and calculates the distance to the screen 201 based on the
data calculated from the distance measuring sensor 114.
[0019]
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The drive circuit 107 receives the scaled image digital signal from the scaler 103 and its
synchronization signal, and drives the display element 108. The display element 108 is formed of
a display panel such as a liquid crystal panel or a DMD (Digital Mirror Device), forms (displays) a
scaled image, and modulates light from the light source 109 into image light according to the
formed image. The projection optical system 110 includes a projection lens, and magnifies and
projects the image light from the display element 108 on the screen 201.
[0020]
Next, a method of acquiring (ranging) the value of the distance L from the projector 100 to the
screen 201 by the ranging sensor 114 will be described. A distance measuring sensor 114 is
disposed in the vicinity of the projection lens of the projection optical system 110 included in the
projector 100. As the distance measuring sensor 114, at least one of the following two
configurations can be applied. One configured by a pair of infrared LEDs and an infrared
phototransistor, and one configured by a camera module.
[0021]
In the case of an infrared LED and an infrared phototransistor, infrared rays are emitted from the
infrared LED, and the reflected light reflected by the screen is received by the infrared
phototransistor. The distance L to the position at which the infrared light is reflected is calculated
from the time difference between the infrared radiation and the reception of the reflected light,
and the value of the distance L from the projector 100 to the screen 201 can be obtained. When
the camera module is used, it is possible to calculate the distance L by using a phase difference
detection method known in the art or the like, and to obtain the value of the distance L from the
projector 100 to the screen 201. And since both the infrared method and the camera method are
sensors with high versatility, the volume setting of the sound output from the projector 100 can
be automated using a low cost general purpose module or the like.
[0022]
Next, an example of the flow from when the power of the projector 100 is turned on (on) until
the sound is output from the speaker 113 by the sound volume setting unit configured by the
control unit 104 and the sound processing unit 112 is shown in FIG. It demonstrates using a
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figure. First, the power of the projector 100 is turned on (S01). Then, the light source 109 of the
projector 100 is turned on, and the distance measurement sensor 114 starts acquiring (ranging)
the value of the distance between the screen 201 and the projector 100 (S02). After these
operations are started, execution of projection processing for enlarging and projecting the input
image signal onto the screen 201 is performed, and sound is not output from the speaker 113
(volume setting is muted) (S03).
[0023]
Thereafter, a first confirmation is made as to whether or not the distance measurement has been
completed and the distance value between the screen 201 and the projector 100 has been
acquired by the distance measurement sensor 114 (S04). When distance measurement
completion is confirmed in this first confirmation (Yes in S04), it is used when determining the
volume from the acquired distance value using the projection size table in which the acquired
distance is associated with the projection size The projection size to be determined is determined
(S05).
[0024]
After the projection size is determined (S05), the volume setting value is determined from the
determined projection size using the volume setting table in which the determined projection size
is associated with the volume setting of the sound to be output. To set the volume of the sound to
be output from (S06). Thereafter, the setting for preventing the sound output from the speaker
113 (the mute setting of the speaker 113) is canceled (S07), and the sound is output with the
sound volume setting of the sound suitable for the environment to be used (S08) .
[0025]
If it is confirmed that the distance measurement has not been completed (hereinafter referred to
as the distance measurement completion is not completed) by the first confirmation (S04)
whether or not the distance measurement is completed (No in S04), the distance measurement
sensor 114 is performed again The process shifts to the start of re-ranging to measure distance
(S09), and the second confirmation as to whether or not the ranging is completed is performed
again (S10). Step of determining the projection size to be used when determining the volume
from the value of the acquired distance when it is confirmed that the distance measurement is
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completed in the second confirmation of whether the distance measurement is completed (Yes in
S10) (S05) Migrate to Then, each step from the volume setting (S06) of the sound output from
the above-mentioned speaker 113 to the sound output (S08) is executed by the volume setting of
the sound according to the environment to be used.
[0026]
Also, if it is confirmed that the distance measurement is not completed in the second
confirmation of whether the distance measurement is completed (No in S10), the distance count
counter (number of times of distance measurement) is incremented and 1 is added to the number
counter And the number counter is set to 2 (S11). Thereafter, it is confirmed whether the number
counter is larger than 3 (S12), and is confirmed not to be larger than 3 (hereinafter referred to as
the number counter not) (No in S12), and it is shifted to re-ranging start (S09) A third
confirmation is made as to whether or not distance measurement is completed (S10). Step of
determining the projection size to be used when determining the volume from the value of the
acquired distance when it is confirmed that the distance measurement is completed in the third
confirmation of whether the distance measurement is completed (Yes in S10) (S05) Migrate to
Then, each step from the volume setting (S06) of the sound output from the speaker 113
described above to the voice output (S08) with the volume setting of the sound according to the
environment to be used is executed.
[0027]
Whether the above-mentioned re-ranging start (S09) and distance-finding completion (S10), and
this confirmation is not (No at S10) increment of the number counter, and whether the number
counter is larger than 3 The confirmation (S12) as to whether or not it is repeated until the
number counter becomes larger than three. On the other hand, when it is confirmed that the
distance measurement is completed (Yes in S10) in the confirmation (S10) whether the distance
measurement is completed or not, the projection size to be used when determining the volume
from the acquired distance value is determined (S05) Move to). Then, each step from the volume
setting (S06) of the sound output from the speaker 113 described above to the voice output
(S08) with the volume setting of the sound according to the environment to be used is executed.
[0028]
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In addition, when it is confirmed whether the number counter is larger than 3 (S12) and the
number counter is larger than 3 (Yes in S12), the projection size to be used when determining
the volume is 40 [inch] It is determined that (S13). Then, using the volume setting table, the
volume setting value is determined from the determined projection size of 40 [inch], and the
volume setting of the sound output from the speaker 113 is performed (S06). Thereafter, the
setting for preventing the sound output from the speaker 113 (the mute setting of the speaker
113) is canceled (S07), and the sound is output with the sound volume setting of the sound
suitable for the environment to be used (S08) .
[0029]
Next, an example of a projection size table and a volume setting table used to determine the
volume setting value will be described. As shown in FIG. 4A, a projection size table in which the
range of values of the distance between the screen 201 and the projector 100 acquired by the
distance measurement sensor 114 and the projection size are associated in advance as follows.
create. It is a numerical value in the zoom setting (setting of the focal length) which is frequently
used in the projector 100 to be used, and is arbitrarily specified in accordance with the
specifications such as the projection distance and the projection size of the projector 100 to be
used. Here, in the example shown in FIG. 4A, the range of the value of the distance is from 0.8
[m] which is the recommended shortest projection distance to 3.3 [m] which is the recommended
maximum projection distance. , Divided into eight ranges (areas). Then, projection sizes [inch]
respectively corresponding to the eight ranges are associated in eight steps in 10 [inch] steps in
the range of 30 to 100 [inch].
[0030]
As shown in FIG. 4B, the volume setting table in which the projection size determined using the
projection size table is associated with the volume setting of the sound matched to the
environment to be used is created in advance as follows. From the general use form of the
projector 100, the projection size and the volume setting that can be output by the speaker 113
according to the environment such as the size of the room (conference room etc.) using the
projector 100 and the distance from the projector 100 to the audience It is defined arbitrarily
from the volume level which is the value. Here, in the example shown in FIG. 4B, as shown in FIG.
4A, the volume of 0 to 40, which is the volume setting that can be output by the speaker 113, to
the projection size [inch] defined in eight steps. Of the levels, 5 to 40 ranges are associated in 5
steps. Here, the setting in which the volume level is 0 does not output sound from the speaker
113, that is, mute setting.
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[0031]
Then, the projection size is determined from the value of the distance acquired by the distance
measurement sensor 114 using the projection size table, and the volume setting of the sound
adapted to the environment to be used is appropriate using the volume setting table from the
determined projection size. Do it automatically.
[0032]
As described above, the projector 100 according to the present embodiment includes the
distance measurement sensor 114 as a distance acquisition unit, and the volume setting unit
configured by the control unit 104 and the audio processing unit 112.
Since the distance measuring sensor 114 and the sound volume setting means are provided as
described above, the sound output is performed by the sound volume setting means according to
the value [m] of the distance between the screen 201 and the projection device acquired by the
distance measuring sensor 114. The volume setting of the sound outputted by the speaker 113
which is the means can be performed automatically. Therefore, even if the volume setting is not
changed when the environment to be used changes, or the position adjustment of the focus lens
or the zoom lens is not properly performed until the sound output as in the projection device of
Patent Document 1, You can automatically set the volume of the sound that suits your
environment. Therefore, it is a projection device which can project an image and output sound
from the speaker 113, and can provide the projector 100 capable of automatically and
appropriately setting the volume of sound according to the environment to be used. Further, as
described with reference to the flow chart of FIG. 3, by setting the volume at the time of starting
the projector 100, when the environment to be used changes, the volume setting of the sound
according to the environment to be newly used is surely made. It can be done automatically.
[0033]
In addition, by configuring as described above, it is a volume setting method of the projection
apparatus capable of projecting an image and outputting sound from the speaker 113, and the
volume setting of sound suitable for the environment to be used is preferably automatically
performed. The volume setting method of the projector 100 which can be performed can be
provided. In addition, by providing the projector 100 configured as described above, it is a
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projection system capable of projecting an image and outputting an audio from the speaker 113,
and the volume setting of the audio according to the environment to be used is automatically and
appropriately. It is possible to provide a projection system that can
[0034]
In the above-described embodiment, an example in which the speaker 113 as the sound output
unit is provided in the main body of the projector 100 as the projection device has been
described. However, the present invention is not limited to such a configuration. For example, the
present invention can also be applied to a configuration in which the speaker 113 connected by
wire is provided separately from the device body of the projector 100 or provided detachably
with respect to the device body of the projector 100. In addition, an external speaker having a
volume adjustment unit and a wireless communication unit of an audio signal and a volume
setting signal, an audio signal from the volume setting unit configured of the control unit 104,
the audio processing unit 112, etc. It is applicable also to the composition which transmits a
volume setting signal.
[0035]
What has been described above is an example, and the present invention has unique effects in
each of the following modes. (Aspect A) Image input means such as an image input terminal of
the input / output terminal 101 for inputting an image signal such as an image or video signal to
be projected onto a projection target such as the screen 201 In a projection apparatus such as a
projector 100 having an audio input means such as an audio input terminal of an input / output
terminal 101 for inputting an audio signal of audio, measurement of acquiring a value of a
distance between the projection object and the projection apparatus A volume comprising a
distance acquisition unit such as a distance sensor 114, a control unit 104 for setting the volume
of audio output from the audio output unit according to the value of the distance acquired by the
distance acquisition unit, and an audio processing unit 112 And setting means. According to this,
as described in the above embodiment, it is a projection device capable of projecting an image
and outputting voice from a voice output means, and automatically setting the volume of the
voice according to the environment to be used. It is possible to provide a projection device that
can
[0036]
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(Aspect B) In (Aspect A), the sound volume setting unit configured by the control unit 104, the
audio processing unit 112, and the like outputs at the time of start-up upon power on such as the
projector 100 such as the projector 100 being powered on. It is characterized in that volume
setting such as volume level of sound is performed. According to this, as described in the abovementioned embodiment, when the environment to be used changes, the sound volume setting of
the sound according to the environment to be newly used can be performed automatically and
surely.
[0037]
(Aspect C) In (Aspect A) or (Aspect B), the distance acquiring unit including the control unit 104
and the audio processing unit 112 is an infrared LED, an infrared phototransistor, or the like that
acquires a distance using infrared light. It is characterized in that it is a camera method to which
an infrared method configured, or a phase difference detection type method of acquiring a
distance using a camera module is applied. According to this, as described in the above
embodiment, by setting the distance acquiring unit to a highly versatile infrared system or a
camera system, the volume setting of the sound output from the projection device such as the
projector 100 can be set at low cost. It can be automated using a module or the like.
[0038]
(Aspect D) Image output means such as an image input terminal of the input / output terminal
101 for inputting an image signal such as an image or video signal to be projected onto a
projection target such as the screen 201 A volume setting method of a projection apparatus such
as the projector 100, comprising: an audio input unit such as an audio input terminal of the input
/ output terminal 101 for inputting an audio signal of audio; and setting a volume of audio
output from the audio output unit; The projection device includes distance acquisition means
such as a distance measurement sensor 114 for acquiring the value of the distance between the
projection target and the projection device, the control unit 104 for setting the volume of the
sound output from the sound output means A sound volume setting unit configured of a
processing unit 112 and the like, and the sound volume setting unit performs the processing
according to the value of the distance acquired by the distance acquisition unit. It is
characterized in that volume setting of the sound output from the sound output means is
performed. According to this, as described in the above embodiment, the volume setting method
of the projection apparatus capable of projecting the image and outputting the sound from the
sound output means, the volume setting of the sound according to the environment to be used is
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It is possible to provide a volume setting method for a projection device that can be suitably and
automatically performed.
[0039]
(Aspect E) In (Aspect D), the volume setting unit configured by the control unit 104, the audio
processing unit 112, and the like is a volume level of the sound to be output when the projection
device such as the projector 100 is started upon powering on. Etc. are characterized in that the
volume setting is performed. According to this, as described in the above-mentioned
embodiment, when the environment to be used changes, the sound volume setting of the sound
according to the environment to be newly used can be performed automatically and surely.
[0040]
(Aspect F) In (Aspect D) or (Aspect E), the distance acquiring unit including the control unit 104
and the audio processing unit 112 is an infrared LED, an infrared phototransistor, or the like that
acquires a distance using infrared light. It is characterized in that it is a camera method to which
an infrared method configured, or a phase difference detection type method of acquiring a
distance using a camera module is applied. According to this, as described in the above
embodiment, by setting the distance acquiring unit to a highly versatile infrared system or a
camera system, the volume setting of the sound output from the projection device such as the
projector 100 can be set at low cost. It can be automated using a module or the like.
[0041]
(Aspect G) Image output means such as an image input terminal of the input / output terminal
101 for inputting an image signal such as an image or video signal to be projected onto a
projection target such as the screen 201 In a projection system provided with a projection device
such as a projector 100 having an audio input means such as an audio input terminal of an input
/ output terminal 101 for inputting an audio signal of audio, in the projection system, the
distance between the projection object and the projection device Distance acquisition means such
as distance measurement sensor 114 for acquiring a value, and control unit 104 and audio
processing unit 112 for setting the volume of the sound output from the audio output means
according to the value of the distance obtained by the distance acquisition means And sound
volume setting means constituted by the above. According to this, as described in the above
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embodiment, it is a projection system capable of projecting an image and outputting voice from a
voice output means, and automatically setting the volume of the voice according to the
environment to be used. It is possible to provide a projection system that can
[0042]
(Aspect H) In (Aspect G), the volume setting unit configured of the control unit 104, the audio
processing unit 112, and the like performs the projection at the time of start-up upon power on
such as power on of the projection device such as the projector 100. It is characterized in that
volume setting such as the volume level of the sound outputted by the device is performed.
According to this, as described in the above-mentioned embodiment, when the environment to be
used changes, the sound volume setting of the sound according to the environment to be newly
used can be performed automatically and surely.
[0043]
(Aspect I) In (Aspect G) or (Aspect H), the distance acquiring unit including the control unit 104
and the audio processing unit 112 is an infrared LED, an infrared phototransistor, or the like that
acquires a distance using infrared light. It is characterized in that it is a camera method to which
an infrared method configured, or a phase difference detection type method of acquiring a
distance using a camera module is applied. According to this, as described in the above
embodiment, by setting the distance acquiring unit to a highly versatile infrared system or a
camera system, the volume setting of the sound output from the projection device such as the
projector 100 can be set at low cost. It can be automated using a module or the like.
[0044]
Reference Signs List 100 projector 101 input / output terminal 102 image signal processing unit
103 scaler 104 control unit 105 memory 106 operation unit 107 drive circuit 108 display
element 109 light source 110 projection optical system 112 audio processing unit 113 speaker
114 distance measuring sensor 201 screen
[0045]
Unexamined-Japanese-Patent No. 2010-164847
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