JP2014182332A - Signage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase advertisement effects by a signage device.SOLUTION: A signage device 1 for projecting a video includes: distance meters 4L, 4R, 4F and 4B for measuring the distance to the surroundings; and a control part 40. The control part 40 executes a processing step S3 for detecting the distance to a person; processing steps S4 to S6 for detecting the motion of the person; and processing steps S2, S8 for, when determining that the detected motion of the person is a specific motion, setting a sound volume level on the basis of the distance to the person detected by the processing step S3, and for, when determining that the detected motion of the person is not a specific motion, setting a sound volume on the basis of the distance to the surroundings measured by the distance meters 4L, 4R, 4F and 4B.

Description

  The present invention relates to a signage device.

Today, projectors that project a display screen of a personal computer, a playback screen of a video player, a digital image recorded in a semiconductor memory, or the like onto a screen are frequently used (see, for example, Patent Document 1 and Patent Document 2).
In addition, there is a projector that is provided with a speaker, inputs an audio signal output by an external device, and outputs audio from the speaker (see, for example, Patent Document 1).
Further, there is a projector that is provided with a distance meter that measures the distance from the projector to the screen, and that adjusts the projection image based on the distance measured by the distance meter (see, for example, Patent Document 2).

JP 2010-164847 A JP 2009-75147 A

  By the way, a projector is used for a signage device, and an advertisement using video and audio is performed, thereby improving the advertisement effect. However, it is desired to further enhance the advertising effect.

  Therefore, the problem to be solved by the present invention is to increase the advertising effect by the signage device.

  In order to solve the above problems, the signage device has a measuring means for measuring a surrounding distance, a person detecting means for detecting a distance to a person, and a motion detection for detecting a person's movement detected by the person detecting means. Means for determining whether the motion detected by the motion detection means is a specific motion, and a person detected by the human detection means when the determination means determines that the motion is a specific motion And a volume setting unit that sets the volume based on the surrounding distance measured by the measuring means when it is determined that the movement is not a specific movement.

  According to the present invention, if a person around the signage device makes a specific movement, the output sound volume of the signage apparatus becomes suitable for that person, and if the person does not make a specific movement, the output sound volume becomes the surrounding sound. The volume is adjusted to the environment. Therefore, the advertising effect can be enhanced.

It is a top view of the projector installed in the room. It is a front view of the screen where the image | video is not projected. It is a front view of the screen on which the image was projected. It is a block diagram of a projector. It is the figure which showed the lookup table. It is the flowchart which showed the flow of the process which the control part of a projector performs. It is a top view of a projector.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, the embodiments described below are given various technically preferable limitations for carrying out the present invention. Therefore, the technical scope of the present invention is not limited to the following embodiments and illustrated examples.

In this embodiment, the example which uses the projector 1 as a signage apparatus is shown.
FIG. 1 is a plan view of the projector 1 installed in the chamber 99. In FIG. 1, the projector 1 is shown larger than in the room 99.

  As shown in FIG. 1, the projector 1 is connected to an external device (for example, a personal computer, a video / audio reproduction device, etc.) 96 via a video cable 98 and an audio cable 97. A video signal generated by the external device 96 is input to the projector 1 through the video cable 98. The projector 1 is a rear projection type projection device, and an image according to the video signal is projected onto the screen 22 by the projector 1 via the reflection mirror 21. The reflection mirror 21 is provided in a state of standing behind the projector 1, and the screen 22 is provided in a state of standing in front of the projector 1. This screen 22 is a transmissive screen. The projection direction of the projector 1 is backward, and the projection light emitted by the projector 1 is reflected toward the screen 22 by the reflection mirror 21, and an image is displayed on the screen 22. Note that the projection direction of the projector 1 may be forward, and the projection light emitted by the projector 1 may be directly incident on the screen 22.

  The image projected by the projector 1 includes a projection target (for example, a person, a character, an animal, etc.). The screen 22 is depicted by the outline of the projection object. An image is projected onto the screen 22 such that the outer shape of the projection object overlaps the outer shape of the screen 22. That is, the system including the projector 1, the external device 96, the screen 22, and the like reproduces video content and projects the projection target included in the content onto the screen 22 formed into the shape of the projection target. is there. In the present embodiment, as shown in FIGS. 2 and 3, a case where a projection target is a person and the screen 22 is a human figure will be described as an example. However, the present invention is not limited to this. The projection object may be, for example, a character or an animal. FIG. 2 shows the screen 22 before the image is projected, and FIG. 3 shows the screen after the image including the projection object 90 is projected. In addition, it is preferable that the background color of the projection target in the video is black or dark.

  An audio signal generated by the external device 96 is input to the projector 1 through the audio cable 97, and audio according to the audio signal is output by the speakers (electroacoustic transducers) 3L and 3R of the projector 1.

  The projector 1 includes a housing 2, speakers 3L and 3R, distance meters 4L, 4R, 4F and 4B, and a projection lens 5. The housing 2 is provided in a box shape, and speakers 3L and 3R, distance meters 4L, 4R, 4F, and 4B and a projection lens 5 are attached to the housing 2. A front lens of the projection lens 5 is provided on the rear surface 2B of the housing 2.

  The speaker 3 </ b> L is provided on the left side portion of the housing 2, and the speaker 3 </ b> R is provided on the right side portion of the housing 2. Here, “left” and “right” are defined with the direction projected by the projector 1 as the front, the left side surface toward the rear surface 2B of the projector 1 is defined as the left side surface 2L, and the right side surface is defined as the right side surface 2R.

  A distance meter 4L is provided on the left side surface 2L of the housing 2, a distance meter 4R is provided on the right side surface 2R of the housing 2, a distance meter 4F is provided on the front surface 2F of the housing 2, and a distance meter 4B is provided on the housing 2 is provided on the rear surface 2B. The distance meters 4L, 4R, 4F, 4B are provided in different directions. Specifically, the distance meter 4L is provided to the left, the distance meter 4R is provided to the right, the distance meter 4F is provided forward, and the distance meter 4B is provided backward.

The distance meter 4L measures the distance from the object (for example, the wall in the chamber 99) facing the distance meter 4L to the distance meter 4L, converts the measured distance into an electrical signal, and represents the measured signal. (Hereinafter, referred to as a measurement distance signal) is output to the control unit 40. The same applies to the distance meters 4R, 4F, 4B.
The distance meters 4L, 4R, 4F, and 4B are, for example, optical, ultrasonic, or laser beam distance meters. For example, the distance meters 4L, 4R, 4F, and 4B project light (for example, infrared rays), ultrasonic waves, or laser beams, and incident reflected light, reflected ultrasonic waves, or reflected laser beams from an object, from the time of projection to the time of incidence. It is a distance meter that calculates the distance from the time.

  As described above, the distance meters 4F, 4B, 4L, and 4R are respectively provided on the front surface 2F, the rear surface 2B, the left side surface 2L, and the right side surface 2R of the housing 2, so that even if there is no large measuring device, the projector 1 can be measured, for example, the distance L1, L2, L3, L4 from the projector 1 to the left and right front and rear walls in the room 99, the size in the room 99, the installation position of the projector 1, and the like. Therefore, the amount of movement of the projector 1 in the front-rear and left-right directions, the distances L1, L2, L3, L4 from the projector 1 to the left-right front-rear walls in the room 99, the size in the room 99, the installation position of the projector 1, etc. Control (for example, output sound adjustment, projection screen adjustment, keystone correction by image processing, projection lens 5 zooming, projection lens 5 focusing, etc.) can be performed.

  Further, the situation around the projector 1 can be recognized by the measurement distances of the distance meters 4F, 4B, 4L, and 4R. For example, it is possible to recognize whether there are obstacles or people on the front, back, left, and right of the projector 1 and to recognize the distance from the projector 1 to the obstacles or people. Thereby, various controls according to the situation around the projector 1 can be performed.

  FIG. 4 is a block diagram of the projector 1. As shown in FIG. 4, the projector 1 further includes an audio input terminal 31, an audio circuit 32, a control unit 40, a storage unit 41, a video input terminal 51, a video signal processing unit 52, a display controller 53, a display element 54, and light irradiation. A device 55 and the like are provided. The audio circuit 32, the control unit 40, the storage unit 41, the video signal processing unit 52, the display controller 53, the display element 54, and the light irradiation device 55 are accommodated in the housing 2, and the audio input terminal 31 and the video input terminal 51. Are provided on the front surface 2F, the rear surface 2B, the left side surface 2L, the right side surface 2R or the upper surface of the housing 2.

  The video cable 98 is connected to the video input terminal 51, and the video signal output by the external device 96 is input to the video signal processing unit 52 through the video cable 98 and the video input terminal 51. The video signal processing unit 52 performs various signal processes on the video signal input from the external device 96. For example, the video signal processing unit 52 performs scaling of the video signal input from the external device 96 to increase / decrease the resolution of the video signal, change the aspect ratio of the video signal, or digital keystone for the video signal. Make corrections.

  The display controller 53 drives the display element 54 based on the video signal signal-processed by the video signal processing unit 52. When the display element 54 is driven, the light emitted to the display element 54 is modulated for each pixel by the pixel. Thereby, an image is formed by the display element 54.

  The display element 54 is a DMD (digital micromirror device), a transmissive LCD panel (liquid crystal display panel), or a reflective LCD panel having a plurality of pixels arranged in a two-dimensional array. When the display element 54 is a DMD, the pixel of the display element 54 is a movable micromirror, and when the display element 54 is an LCD panel, the pixel of the display element 54 is a liquid crystal shutter element.

  The display controller 53 controls the light irradiation device 55. The light irradiation device 55 irradiates the display element 54 with visible light. Specifically, the light irradiation device 55 is of a color separation method, a color light source method, or a time division method.

  The color separation type light irradiation device 55 separates white light emitted from a white light source into a plurality of colors (for example, red, green, and blue) by a color separator and emits light of these colors. The color light source type light irradiation device 55 emits light of different colors by a plurality of light sources (for example, a red light source, a green light source, and a blue light source). When the light irradiation device 55 is a color separation method or a color light source method, the display element 54 is provided for each color, and light of a plurality of colors emitted from the light irradiation device 55 is irradiated to the display element 54. Is transmitted or reflected.

  The time-division light irradiation device 55 sequentially emits visible light of different colors (for example, red light, green light, and blue light) to the display element 54 in order. One repetition cycle corresponds to a period of one frame, and the display element 54 forms an image of each color in synchronization with the emission timing of each color light of the light irradiation device 55.

  The projection lens 5 projects the image formed by the display element 54 onto the screen 22.

The control unit 40 is a microcomputer having a CPU and the like.
The storage unit 41 is a semiconductor memory, magnetic disk, optical disk, or other storage medium. The storage unit 41 stores a program 41a. Various functions of the control unit 40 are realized by the program 41a, and the video signal processing unit 52, the display controller 53, and the audio circuit 32 are integrally controlled by the control unit 40.

  The control unit 40 includes a sound source module, generates a digital audio signal by the sound source module, and outputs the digital audio signal to the audio circuit 32.

  The audio cable 97 is connected to the audio input terminal 31, and the audio signal output by the external device 96 is input to the audio circuit 32 through the audio cable 97 and the audio input terminal 31.

  The audio circuit 32 performs acoustic signal processing on the audio signal input from the external device 96 and adjusts the volume level of the audio signal processed by the acoustic signal. The audio circuit 32 converts the digital audio signal input from the control unit 40 into an analog audio signal and adjusts the volume level of the analog audio signal. The audio signal whose volume level is adjusted is output to the speakers 3L and 3R by the audio circuit 32. The speakers 3L and 3R convert the sound signal into sound and output the sound.

  Here, the audio circuit 32 adjusts the volume level of the audio signal output to the speakers 3L and 3R to the set volume level set by the control unit 40. This will be specifically described below.

  The control unit 40 sets the set volume level based on the distances measured by the distance meters 4L, 4R, 4F, 4B. Specifically, the control unit 40 obtains a mean square value of the distances measured by the distance meters 4L, 4R, 4F, and 4B, and sets a set volume level corresponding to the mean square value. When the measurement distances of the distance meters 4L, 4R, 4F, and 4B are L1, L2, L3, and L4, respectively, and the mean square value is MSV, the mean square value MSV is as follows.

  The program 41a incorporates a look-up table or function, and the control unit 40 refers to the look-up table or function and sets the volume based on the mean square value of the distances measured by the distance meters 4L, 4R, 4F, 4B. Set the level. The look-up table and function represent the relationship between two variables. One variable is a mean square value, and the other variable is a set volume level. The lookup table associates a numeric value column of one variable (root mean square value) with a numeric value column of the other variable (set volume level), and an example of the lookup table is shown in FIG. As shown in FIG. 5, the look-up table is a table in which one variable (root mean square value) increases stepwise, and the other variable (set volume level) increases stepwise. The function is a numerical expression of the relationship between one variable (root mean square value) and the other variable (set volume level). The function is such that as one variable (root mean square value) increases, the other variable (set volume level) increases.

  The control unit 40 outputs a signal representing the set volume level set as described above to the audio circuit 32. Then, as described above, the audio circuit 32 adjusts the volume level of the output audio signal of the audio circuit 32 to the set volume level.

  Thereafter, a person is detected by the distance meters 4L, 4R, 4F, and 4B, and an audience of interest is detected from the distance meters 4L, 4R, 4F, and 4B, and the control unit 40 has a sound volume suitable for the audience. Set. Hereinafter, the flow of processing in which the volume is set by the control unit 40 will be described with reference to the flowchart of FIG.

FIG. 6 is a flowchart for explaining volume setting processing according to the present embodiment.
First, the control unit 40 measures the surrounding distance using the distance meters 4L, 4R, 4F, and 4B (step S1). The surrounding distance is measured by a change in the distance value measured by the distance meters 4L, 4R, 4F, and 4B. When the distance value measured by each of the distance meters 4L, 4R, 4F, and 4B does not change for a predetermined time or more, the value is set as the surrounding distance. That is, the measurement distance signals input from the distance meters 4L, 4R, 4F, and 4B to the control unit 40 are monitored by the control unit 40 for a predetermined time, and the control unit 40 determines that the levels of the measurement distance signals have been changed from the start of step S1. If it is detected that it has been maintained for a predetermined time or longer, the levels of these measurement distance signals are detected as the surrounding distance. In the case of the inside of the room 99, the periphery of the projector 1 is a wall, and the distance outside the projector 1 is not measured. Therefore, the maximum value of the measurement distance values of the distance meters 4L, 4R, 4F, 4B It may be a distance. Hereinafter, the surrounding distance measured in step S1 is referred to as an initial value.

  Next, the control unit 40 searches the volume level corresponding to the mean square value of the distances measured by the distance meters 4L, 4R, 4F, and 4B with reference to the lookup table or function, and sets the set volume to the volume. The level is set (step S2). Therefore, the volume is set to be suitable for the surrounding environment (step S2). Hereinafter, the volume set in step S2 is referred to as an initial volume.

  Next, it is detected whether the distance meters 4L, 4R, 4F, 4B have detected a person (step S3). In step S3, a person is detected depending on whether or not the value obtained by measuring the surroundings changes. That is, when the measurement distance signals input from the distance meters 4L, 4R, 4F, and 4B to the control unit 40 are monitored by the control unit 40 (step S3) and the levels of these measurement distance signals change from the initial values, The control unit 40 detects the change to detect a person (step S3: YES). On the other hand, when the level of the measurement distance signal is maintained at the initial value, a change in the measurement distance signal is not detected by the control unit 40, and thus no person is detected (step S3: NO).

  If no person is detected by the control unit 40 and the distance meters 4L, 4R, 4F, and 4B (step S3: NO), the processing step of the control unit 40 returns to step S2, and the initial volume based on the initial value continues as it is. Is set (step S2). On the other hand, when a person is detected by the control unit 40 and the distance meters 4L, 4R, 4F, and 4B (step S3: YES), the processing step of the control unit 40 proceeds to step S4. Hereinafter, of the distance meters 4L, 4R, 4F, and 4B, a distance meter that detects a person is referred to as a “distance meter related to the first detection”, and the distance meter is denoted by reference symbol A.

  In step S4, it is determined whether or not the detected person has been detected for a certain period of time depending on whether or not the value of the distance meter A has reached the initial value. That is, the measurement distance signal (the level is changed from the initial value) input from the distance meter A to the control unit 40 is monitored by the control unit 40 for a certain period of time, and the level of the measurement distance signal is set at step S4. If the control unit 40 detects that a predetermined value or a predetermined range has been maintained for a predetermined time or more from the start time, it is determined that a person is detected for a predetermined time or more (step S4: YES). On the other hand, if the control unit 40 detects that the level of the measurement distance signal has deviated from a predetermined value or within a predetermined range before a predetermined time has elapsed from the start of step S4, the detection of a person will occur before the predetermined time elapses. It is determined that it has come off (step S4: NO).

  When it is determined by the control unit 40 that a person is detected for a certain period of time (step S4: YES), the processing step of the control unit 40 proceeds to step S7, and the fact that the detection of the person has departed before a certain time has elapsed. Is determined by the control unit 40 (step S4: NO), the processing step of the control unit 40 proceeds to step S5.

  In step S5, it is determined whether or not a person has been detected by another distance meter (hereinafter referred to as B) within a predetermined time. For example, when the measurement distance signal input from the distance meter B to the control unit 40 is monitored by the control unit 40 and the level of these measurement distance signals changes, the control unit 40 detects the change, and the control unit 40 This determination means that a person is detected (step S5: YES). On the other hand, when the levels of these measurement distance signals do not change, the control unit 40 determines that no person is detected (step S5: NO).

  If no person is detected by another distance meter B in step S5 (step S5: NO), the processing step of the control unit 40 returns to step S2. Therefore, the initial volume based on the initial value is continuously set (step S2).

  On the other hand, when a person is detected by another distance meter B in step S5 (step S5: YES), the processing step of the control unit 40 proceeds to step S6.

  In step S6, it is determined whether or not the person has been detected by the distance meter B, and whether or not the person has been detected by the distance meter A is determined. That is, the measurement distance signal input from the distance meter A and the distance meter B to the control unit 40 is monitored by the control unit 40. When the control unit 40 detects that the level of the measurement distance signal of the distance meter B has reached the initial value, it is determined that the person has deviated from the detection of the distance meter B. On the other hand, if the control unit 40 does not detect that the measurement distance signal of the distance meter B has reached the initial value, it is determined that the person has not deviated from the detection of the distance meter B. Further, when the control unit 40 detects that the level of the measurement distance signal of the distance meter A has changed from the initial value, it is determined that the person has detected with the distance meter A. On the other hand, if the control unit 40 does not detect that the measurement distance signal of the distance meter A has changed from the initial value, it is determined that the person does not detect with the distance meter A.

If it is determined in step S6 that a person has not been detected by the distance meter B or a person has not been detected by the distance meter A (step S6: NO), the processing step of the control unit 40 Returns to step S2. Therefore, the initial volume based on the initial value is continuously set (step S2).
On the other hand, if it is determined in step S6 that the person is not detected by the distance meter B and the person is detected by the distance meter A (step S6: YES), the processing step of the control unit 40 proceeds to step S7. move on.

In step S7, the control unit 40 searches the volume level corresponding to the mean square value of the distances measured by the distance meters 4L, 4R, 4F, and 4B with reference to the lookup table or function, and sets the set volume to that level. Set the volume level.
When the processing step of the control unit 40 proceeds to step S7, the measurement distances of the distance meters other than the distance meter A among the distance meters 4L, 4R, 4F, and 4B are the initial values, but the measurement distance of the distance meter A Is deviated from the initial value. Therefore, when the process of the control unit 40 proceeds to step S7, the output volume is changed from the initial value.

  The processing step of the control unit 40 proceeds from step S7 to step S8. In step S8, it is determined whether or not the person is out of detection by the distance meter A (step S8). That is, when the measurement distance signal input from the distance meter A to the control unit 40 is monitored by the control unit 40 and the control unit 40 detects that the level of the measurement distance signal of the distance meter A has reached the initial value, If it is determined that the distance meter A is not detected (step S8: YES), and the control unit 40 does not detect that the measured distance signal of the distance meter A has reached the initial value, the person detects the distance meter A. It is determined that it is not out of the range (step S8: NO).

If it is determined in step S8 that the person has not deviated from the detection of the distance meter A (step S8: NO), the processing step of the control unit 40 returns to step S8. Therefore, the volume based on the measurement distances of the distance meters 4L, 4R, 4F, 4B is continuously set (step S8).
On the other hand, if it is determined in step S8 that the person has not been detected by the distance meter A, the processing step of the control unit 40 returns to step S2. Therefore, an initial volume based on the initial value is set (step S2).

  The detection pattern of Yes in step S3, No in step S4, Yes in step S5, and Yes in step S6 indicates the movement of the projector 1 when viewed from the front side and returned to the front side. Yes. By recognizing such a specific detection pattern, a person who is interested in the projector 1 can be extracted.

  That is, at first, the volume is set according to the surrounding environment, and when a person who is interested in the projector 1 is extracted thereafter, the volume can be changed according to the person. For this reason, if there is no person who is particularly interested, you can advertise to the surroundings, and if there is a person who is particularly interested, you can advertise at a volume suitable for that person. , The advertising effect can always be kept high.

  According to the above embodiment, the volume of the output sound of the speakers 3L and 3R is automatically adjusted, and the volume of the output sound of the speakers 3L and 3R is determined by the installation position of the projector 1 and the size in the room 99. Therefore, it is possible to save the user from setting the volume according to the installation position of the projector 1 and the size in the room 99.

For example, if the projector 1 is installed in the center of the room 99, the output sound of the speakers 3L and 3R is easily transmitted to the end of the room 99, so it is sufficient that the output volume of the speakers 3L and 3R is low. . In such a case, the root mean square value MSV obtained from the measured distances of the distance meters 4L, 4R, 4F, and 4B is low, so that the set volume level is also low and the output volume of the speakers 3L and 3R is low. Therefore, the user does not have to adjust the volume. On the other hand, if the projector 1 is installed at the end in the room 99, the output sound of the speakers 3L, 3R is difficult to be transmitted to the opposite end, so that the output volume of the speakers 3L, 3R needs to be increased. In such a case, since the root mean square value MSV obtained from the measured distances of the distance meters 4L, 4R, 4F, and 4B is high, the set volume level is also increased, and the output volume of the speakers 3L and 3R is increased. Therefore, the user does not have to adjust the volume.
In addition, when a particularly focused person is detected, it is possible to switch the sound volume suitable for the detected person from the sound volume suitable for the surroundings.
In the present embodiment, the person to be detected is described as one person. However, the present invention is not limited to this, and it is only necessary to recognize a person who is paying attention to the projector 1 by specifically detecting movement.

[Modification]
Hereinafter, some modified examples will be described. The modifications described below are the same as those in the above-described embodiment except for the changes.

  As shown in FIG. 7, the distance meter 4 </ b> L may be a scanning distance meter (so-called range sensor) that measures the distance to an object for each direction. For example, the scanning plane of the distance meter 4L is parallel to the horizontal plane, and the distance meter 4L scans the light, ultrasonic wave, or laser beam by changing the direction in which the light, ultrasonic wave, or laser beam is projected along the horizontal plane. This is a scanning lightwave rangefinder that obtains the distance for each direction from the time from the time to the incident. The distance meter 4L, which is a scanning distance meter, outputs an electrical signal indicating the measurement distance for each direction to the control unit 40. The electrical signal output by the distance meter 4L is polar coordinate data in which a measurement distance is associated with each direction. Similarly, the distance meters 4R, 4F, and 4B may be scanning distance meters.

  In this modification, scanning rangefinders are installed on all sides of the screen of this signage device. As shown in FIG. 7, when a person approaches the screen of the signage device, the distance and direction of the person with respect to the screen can be detected by a four-way scanning distance meter. Thereby, it can be determined how the approaching person is moving. In addition, since a plurality of people can be detected with one scanning distance meter, the distribution of people around the screen can also be measured.

  Therefore, it is possible to detect a person who is particularly interested in the number of people who are paying attention to the screen and the movement of the person. For example, when there are many people around the screen, but a particularly focused person such as a person approaching the projector 1 is detected, the volume can be adjusted to that person.

A volume setting method using the scanning distance meter used in this modification will be described below.
The distance meters 4L, 4R, 4F, and 4B are scanning distance meters. Here, if the distances of all the directions measured by the distance meters 4L and 4B are not infinite, the projector 1 is installed at a corner in the room 99. Therefore, when the distances of all directions measured by the distance meters 4L and 4B are not infinite, the control unit 40 controls the audio circuit 32 to greatly adjust the volume level of the audio signal output to the speakers 3L and 3R. .
If the distance from the distance meter 4L to the object is longer than the measurable distance of the distance meter 4L, the measurement distance of the distance meter 4L is infinite. Further, if the distances of all directions measured by the scanning distance meter 4L are infinite, there is no object around the distance meter 4L. The same applies to the distance meters 4R, 4F, 4B.

The distance meters 4L, 4R, 4F, and 4B are scanning distance meters, and the control unit 40 controls the audio circuit 32 based on changes in the measured distances of the distance meters 4L, 4R, 4F, and 4B. This will be specifically described below.
If the distance of a certain azimuth (hereinafter referred to as a specific azimuth) measured by the distance meter 4L or the distance in the range centered on the specific azimuth is not infinite and the other azimuth is infinite, the specific azimuth or The object exists within the range centered on. At this time, when the object approaches the projector 1, the distance in the specific direction measured by the distance meter 4L becomes small after a predetermined time (for example, several seconds) has elapsed. In that case, the control unit 40 controls the audio circuit 32 and adjusts the volume level of the audio signal output to the speakers 3L and 3R to be small. On the other hand, when the object moves away from the projector 1, the distance in a specific direction measured by the distance meter 4L increases after a predetermined time (for example, several seconds) elapses. In this case, the control unit 40 controls the audio circuit 32 to greatly adjust the volume level of the audio signal output to the speakers 3L and 3R.

  The control unit 40 may set the set volume level of the left audio signal and the set volume level of the right audio signal separately. Specifically, the control unit 40 determines that the ratio between the set volume level of the left audio signal and the set volume level of the right audio signal is the ratio of the measurement distance of the right distance meter 4R to the measurement distance of the left distance meter 4L. The set volume levels of the left and right audio signals are set so as to be equal. That is, if the set volume level of the left audio signal and the set volume level of the right audio signal are V1 and V2, respectively, and the measurement distances measured by the distance meters 4L and 4R are L1 and L2, respectively, the control unit 40 Set the volume levels V1 and V2 that satisfy “V1 / V2 = L2 / L1”. Then, the volume levels of the left and right output audio signals of the audio circuit 32 are adjusted by the audio circuit 32 to the set volume levels V1 and V2, respectively. Even in this case, the output volume of the speakers 3L and 3R is determined by the installation position of the projector 1. That is, if the projector 1 is installed near the left wall in the room 99, the output volume of the right speaker 3R is higher than the output volume of the left speaker 3L, and the projector 1 is near the right wall in the room 99. If installed, the output volume of the left speaker 3L is higher than the output volume of the right speaker 3R, and if the projector 1 is installed in the center of the room 99, the output volumes of the left and right speakers 3L, 3R become equal. . Therefore, it is possible to save the user from setting the volume according to the installation position of the projector 1.

  In addition to the four distance meters 4L, 4R, 4F, and 4B, a distance meter may be further provided in the housing 2. For example, additional rangefinders may be provided at the right front corner, the left front corner, the right rear corner, and the left rear corner of the housing 2, respectively, and may be directed to the front right, front left, back right, and back left, respectively. . In this case, the control unit 40 obtains a double average value of the measurement distances of a total of eight distance meters, obtains a set volume level from the double average value, and sets the volume level of the audio signal of the audio circuit 32 to the set volume. Set to level.

  “Left” and “right” may be defined as viewed from the front to the rear of the projector 1, and the right side surface toward the front surface of the projector 1 may be the right side surface, and the left side surface may be the left side surface.

  The left and right external speakers are connected to the audio circuit 32 via a speaker cable, the left audio signal is output to the left external speaker by the audio circuit 32, and the right audio signal is output to the right external speaker by the audio circuit 32. May be.

In the embodiment of the present invention, the signage device using a projector has been described. However, the present invention is not limited to this, and a signage system may be added to which an information processing device that realizes each configuration described in the above embodiment is added. Further, in the embodiment of the present invention, the distance meter is provided in the projector, but the present invention is not limited thereto, and may be provided in the screen. In the present embodiment, an example using a projector has been described. However, the present invention is not limited to this, and a device that outputs only sound or a device that includes a display unit such as a liquid crystal display may be used.
As mentioned above, although several embodiment of this invention was described, the scope of the present invention is not limited to the above-mentioned embodiment, The range of the invention described in the claim, and its equivalent range Including.
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.
[Appendix]
<Claim 1>
Measuring means for measuring the surrounding distance;
A person detecting means for detecting a distance from the person;
A motion detection means for detecting the movement of the person detected by the person detection means;
Determination means for determining whether the movement detected by the movement detection means is a specific movement;
When the determination means determines that the movement is a specific movement, a volume level is set based on the distance from the person detected by the person detection means, and when it is determined that the movement is not a specific movement, it is measured by the measurement means. A volume setting section for setting the volume based on the surrounding distance;
A signage device comprising:
<Claim 2>
The measuring means and the person detecting means use a distance meter,
The signage device according to claim 1.
<Claim 3>
There are a plurality of the distance meters,
The signage device according to claim 2.
<Claim 4>
The distance meter is provided on the front surface, the rear surface, the left side surface and the right side surface of the signage device, respectively.
The signage device according to claim 3.
<Claim 5>
The distance meter measures the distance to the object facing the distance meter;
The signage device according to claim 3 or 4.
<Claim 6>
The volume setting means sets the volume level to a set volume level according to a mean square value of the surrounding distance measured by the measurement when the determination means determines that the movement is not a specific movement.
The signage device according to any one of claims 1 to 5, wherein
<Claim 7>
An audio circuit that outputs the left audio signal to the left electroacoustic transducer and outputs the right audio signal to the right electroacoustic transducer;
With
The volume setting means is configured such that a ratio between a volume level of the left audio signal and a volume level of the right audio signal is measured by a distance meter provided on a right side surface of the casing, and a left side surface of the signage device. Setting the volume level of the left audio signal and the right audio signal to be equal to the ratio of the distance measured by the distance meter provided in
The signage device according to claim 4.
<Claim 8>
The distance meter is a scanning distance meter that measures a distance to an object for each direction.
The signage device according to claim 2.
<Claim 9>
Projection means for projecting images;
A screen for displaying an image projected by the projection means;
The signage apparatus as described in any one of Claims 1-8 provided with these.

DESCRIPTION OF SYMBOLS 1 Projector 2 Housing | casing 3L Speaker 3R Speaker 4L Distance meter 4R Distance meter 4F Distance meter 4B Distance meter 32 Audio circuit 40 Control part (person detection means, motion detection means, volume setting part)

Claims (9)

Measuring means for measuring the surrounding distance;
A person detecting means for detecting a distance from the person;
A motion detection means for detecting the movement of the person detected by the person detection means;
Determination means for determining whether the movement detected by the movement detection means is a specific movement;
When the determination means determines that the movement is a specific movement, a volume level is set based on the distance from the person detected by the person detection means, and when it is determined that the movement is not a specific movement, it is measured by the measurement means. A volume setting unit for setting the volume based on the surrounding distance;
A signage device comprising: The measuring means and the person detecting means use a distance meter,
The signage device according to claim 1. There are a plurality of the distance meters,
The signage device according to claim 2. The distance meter is provided on the front surface, the rear surface, the left side surface and the right side surface of the signage device, respectively.
The signage device according to claim 3. The distance meter measures the distance to the object facing the distance meter;
The signage device according to claim 3 or 4. The volume setting means sets the volume level to a set volume level according to a mean square value of the surrounding distance measured by the measurement when the determination means determines that the movement is not a specific movement.
The signage device according to any one of claims 1 to 5, wherein An audio circuit that outputs the left audio signal to the left electroacoustic transducer and outputs the right audio signal to the right electroacoustic transducer;
With
The volume setting means is configured such that a ratio between a volume level of the left audio signal and a volume level of the right audio signal is measured by a distance meter provided on a right side surface of the casing, and a left side surface of the signage device. Setting the volume level of the left audio signal and the right audio signal to be equal to the ratio of the distance measured by the distance meter provided in
The signage device according to claim 4. The distance meter is a scanning distance meter that measures a distance to an object for each direction.
The signage device according to claim 2. Projection means for projecting images;
A screen for displaying an image projected by the projection means;
The signage apparatus as described in any one of Claims 1-8 provided with these.

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