JP2016201694A - Electronic device and control method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a user to listen to sound in stereo when a plurality of electronic devices are simultaneously used.SOLUTION: An image display device 100A includes: position discrimination means 120 for discriminating a position relative to a user; a speaker 104; sound input sections 101A and 101B; and a sound output control section 110A for controlling connection and disconnection of the sound input sections and the speaker so that sound for a left ear is output from the speaker and sound for a right ear is not output.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electronic device such as a projector or a display.

  Patent Document 1 proposes a projector that switches between right and left speakers to reproduce audio signals of left and right channels obtained from a stereo audio signal source based on an inverted display state of an image.

Japanese Patent No. 3738698

  According to Patent Document 1, when performing multi-projection in which screens projected by a plurality of projectors are arranged side by side, each projector outputs audio signals of both left and right channels. A user at the approximate center of the plurality of projectors can hear the sound of both left and right channels from the left side and the sound of both left and right channels from the right side, and cannot be recognized as stereo sound.

  An object of the present invention is to provide an electronic device that allows a user to listen to sound in stereo when a plurality of electronic devices are used simultaneously, and a control method thereof.

  An electronic device according to the present invention is an electronic device that outputs sound, and includes a position determination unit that determines the position of the electronic device with respect to a predetermined position, and a sound that outputs a drive signal that drives the sound output unit based on an input signal. The sound corresponding to the position of the electronic device determined by the position determination unit among the signal processing unit and the left sound and the right sound is output from the sound output unit, and the sound not corresponding to the position of the electronic device The audio signal processing means and audio output control means for controlling connection and disconnection of the audio output means so as not to be output from the audio output means.

  ADVANTAGE OF THE INVENTION According to this invention, when a some electronic device is used simultaneously, the electronic device which a user can listen to an audio | voice in stereo, and its control method can be provided.

It is a block diagram of the image display apparatus of this invention. Example 1 1 is a configuration diagram and an arrangement diagram of an image display device of the present invention. (Example 2) 1 is a layout view and a configuration diagram of an image display device of the present invention. (Example 3) It is a block diagram of the image display apparatus of this invention. Example 4 It is a block diagram of the image display apparatus of this invention. (Example 5) It is a perspective view for demonstrating the measurement of the brightness | luminance by the brightness | luminance sensor shown in FIG. (Example 5) 1 is a perspective view of an image display system of the present invention. (Example 6) It is a flowchart for demonstrating operation | movement of the image display system shown in FIG. (Example 6) It is a figure which shows an example of an operation screen. (Example 7)

  The present invention can be applied to an electronic device that outputs at least sound, but the electronic device may further output an image. For example, the electronic device includes a projection type image display device such as a liquid crystal projector and a mirror type projector using DMD, an image display device such as a liquid crystal display and a CRT display, and other electronic devices such as a smart phone and a PDA. In addition, the electronic device may output an image, and the plurality of electronic devices may output a plurality of images, and the plurality of images may form a single image as a whole. You may make it a part overlap.

  FIG. 1 is a configuration diagram of a projection-type image display apparatus (electronic device) 100A according to Embodiment 1 of the present invention. The image display apparatus 100A includes a left channel audio input unit 101A, a right channel audio input unit 101B, a speaker (SP) 104, an audio output control unit 110A, a position determination unit 120, an installation state determination unit 122, an operation unit 124, and a storage unit 126. Have Further, the image display device 100A projects an image on a screen (projected surface).

  A left channel audio signal is input to the left channel audio input unit 101A and a right channel audio signal is input to the right channel audio input unit 101B from an audio output device external to the image display device 100A or an audio output unit inside the image display device. Entered. The left channel audio signal is an audio signal for the left ear (for left) of the user (viewer), and the right channel audio signal is an audio signal for the user's right ear (for right). The left channel audio input unit 101A and the right channel audio input unit 101B function as audio signal processing means for inputting audio signals of a plurality of channels and outputting a drive signal for driving the speaker 104 based on the input signals.

  The speaker 104 is an example of an audio output unit that outputs audio that can be listened to by the user. The speaker 104 may be provided so as to intersect with a plane extending in the vertical direction (gravity direction), including the optical axis of the projection optical system that projects an image, such as being provided in the center of the rear surface of the housing of the image display device 100A. Good.

  The sound output control unit (sound output control means) 110A has two switches 112 and 114, and controls the opening and closing thereof. Thus, the audio output control unit 110A controls connection and disconnection between the audio signal processing means and the audio output means for each audio signal of each channel. The audio output control unit 110A controls the output of the left channel audio signal input from the left channel audio input unit 101A and the output of the right channel audio signal input from the right channel audio input unit 101B by opening and closing the switches 112 and 114. To do.

  When the switch 112 is closed, the left channel audio signal is output to the speaker 104, and when the switch 112 is opened, the left channel audio signal is not output to the speaker 104. When the switch 114 is closed, the right channel audio signal is output to the speaker 104, and when the switch 114 is opened, the right channel audio signal is not output to the speaker 104. As a result, the speaker 104 does not perform audio output, outputs only the left channel audio signal, outputs only the right channel audio signal, and outputs both the left channel audio signal and the right channel audio signal. Can be taken.

  The operation unit 124 is an input unit that is input by a user, and includes buttons, switches, dials, a liquid crystal screen, and the like. Display means such as a liquid crystal screen may be provided separately from the operation unit 124. Via the operation unit 124, the user can input information for manually selecting the opening and closing of the switches 112 and 114, position information of the image display device 100A viewed from the user, installation information of the image display device 100A, and the like. . The storage unit (storage unit) is a memory that stores information input from the operation unit 124.

  The position determining unit 120 determines whether the housing of the image display device 100A is located on the left side, the right side, or the center with respect to the user (predetermined position). The “center” means that the plane including the user's midline overlaps the housing of the image display apparatus 100A (extends in the direction of gravity and the direction perpendicular to the image display plane and is on a plane including a predetermined position). This means that a slight misalignment is allowed. The determination method is not limited. For example, the user may select any one of the left side, the right side, and the center via the operation unit 124.

  The installation state determination unit 122 determines the installation state of the image display device 100A. The installation state includes desk-top installation and ceiling suspension. Here, “desktop placement” means the installation state of the first posture in which the top plate of the frame of the image display device is positioned above the bottom plate of the frame in the direction of gravity, such as placing the image display device on a tabletop ( (Normal installation state). “Ceiling suspension” is an installation state in a second posture in which the top plate of the image display device is positioned below the bottom plate in the direction of gravity, such as mounting the image display device upside down on the ceiling. It is a state where it is installed upside down with respect to the normal installation state. In the case of ceiling suspension, such as Example 2 described later, the position of the speaker relative to the user may be reversed. The installation state discriminating means 122 may be provided with a detecting means such as a gravity sensor (not shown), or the user may read the setting value of the ceiling suspended by the user via the operation unit 124 and stored in the storage unit 126. Whether it is suspended from the ceiling may be automatically determined based on the detection result of the detection means.

  The sound output control unit 110A may control whether the switches 112 and 114 are turned on or off based on information manually input by the user, the determination results of the position determination unit 120 and the installation state determination unit 122, and preset information. You may control automatically based on. For example, when the user changes the ceiling setting value, the automatic control may be performed based on a trigger when it is determined whether the ceiling is suspended by using a detection unit such as a gravity sensor.

  As will be described later, the preset information is information for enabling the user to listen to the sound in stereo when a plurality of image display devices are used at the same time. This is information corresponding to the determination result of the means 122.

  The sound output control unit 110A outputs sound corresponding to the position of the image display device 100A determined by the position determination unit 120 from the speaker 104, and sound that does not correspond to the position of the image processing device 100A determined by the position determination unit 120. Control to prevent output. For example, when the position of the image display device 100A determined by the position determination unit 120 is the left side (left ear side) of the user, the left channel sound is output from the speaker 104 and the sound of other channels such as the right channel sound is output. Let's not be. Similarly, when the position of the image display device 100A determined by the position determination unit 120 is on the right side (right ear side) of the user, right channel sound is output from the speaker 104, and sound of other channels such as left channel sound is output. Prevent output. As a result, when a plurality of image display devices are used at the same time, the user can listen to the sound in stereo. A case where a plurality of image display devices are used simultaneously is, for example, a case where a plurality of image display devices output a plurality of images to form one image as a whole, and this is the same in other embodiments. is there.

  For example, when it is determined that the image display device 100A is located on the left side of the user, the audio output control unit 110A closes the switch 112, opens the switch 114, and outputs the left channel audio signal from the speaker 104. When it is determined that the image display device 100A is located on the right side of the user, the audio output control unit 110A opens the switch 112, closes the switch 114, and outputs the right channel audio signal from the speaker 104. When the image display device 100A is located at the approximate center with respect to the user, the audio output control unit 110A outputs audio of both the left and right channels, outputs an audio channel signal corresponding to the center, or outputs audio. You can choose whether or not.

  Since the installation state of the image display device may be fixed (one type), the audio output control unit 110A controls the output of the audio signal of each channel based on at least the determination result of the position determination unit 120. It's enough.

  According to the present embodiment, stereo sound can be provided without making the user deeply aware of the installation state of the image display device 100A.

  FIG. 2A is a configuration diagram of a projection-type image display device 100B according to Embodiment 2 of the present invention. The image display device 100B includes an audio output control unit 110B instead of the audio output control unit 110A, and includes a plurality of speakers having the same structure as the speaker 104 (that is, the first speaker 104A and the second speaker 104B). This is different from the image display device 100A. In other respects, the image display device 100B is the same as the image display device 100A, and common portions are denoted by the same reference numerals. The first speaker (SP1) 104A and the second speaker (SP2) 104B have the projection optical axes of the image display device 100B placed on the desktop, such as the left side and the right side of the rear surface of the housing of the image display device 100A placed on the table. It may be arranged on both sides of a plane that includes and extends in the vertical direction.

  When the first speaker 104A is positioned on the right side of the user and the second speaker 104B is positioned on the left side of the user when placed on the desk, the first speaker 104A is on the left side of the user and the second speaker 104B is the user on the ceiling. It will be located on the right side.

  The audio output control unit 110B has four switches 112A, 112B, 114A, and 114B, and controls opening and closing of these. The audio output control unit 110B opens and closes the four switches 112A, 112B, 114A, and 114B, and the left channel audio signal input from the left channel audio input unit 101A and the right channel audio signal input from the right channel audio input unit 101B. Control the output of.

  When the switch 112A is closed, the left channel audio signal is output to the first speaker 104A, and when the switch 112A is opened, the left channel audio signal is not output to the first speaker 104A. When the switch 112B is closed, the left channel audio signal is output to the second speaker 104B, and when the switch 112B is opened, the left channel audio signal is not output to the second speaker 104B. When the switch 114A is closed, the right channel audio signal is output to the first speaker 104A, and when the switch 114A is opened, the right channel audio signal is not output to the first speaker 104A. When the switch 114B is closed, the right channel audio signal is output to the second speaker 104B, and when the switch 114B is opened, the right channel audio signal is not output to the second speaker 104B. As a result, the first speaker 104A outputs no audio, outputs only the left channel audio signal, outputs only the right channel audio signal, and outputs both the left channel audio signal and the right channel audio signal. Two states can be taken. The same applies to the second speaker 104B.

  By individually controlling the first speaker 104A and the second speaker 104B, the user can listen to the sound in stereo even when the number of the image display device 100B is one.

  The audio output control unit 110B may control whether the switches 112A, B, 114A, and B are turned on or off based on information manually input by the user, or based on detection results of the position determination unit 120 and the installation state determination unit 122. May be controlled automatically.

  When the position determination unit 120 determines that the image display device 100B is on the left side of the user, the audio output control unit 110B outputs the left channel audio from the speakers 104A and 104B, and the audio of other channels such as the right channel audio is output. Prevent output. In addition, when the position determination unit 120 determines that the image display device 100B is on the right side of the user, the audio output control unit 110B outputs the right channel audio from the speakers 104A and 104B and outputs the left channel audio signal and the like. Let's not be. As a result, when a plurality of image display devices are used at the same time, the user can listen to the sound in stereo.

  For example, it is assumed that two image display devices 100E are installed on the left and right sides of the room. FIG. 2B is a front view showing a state where two image display devices 100E are placed on a desk, and FIG. 2C is a front view showing a state where the two image display devices 100E are suspended from the ceiling. 2B and 2C, since the projector is installed upside down, the arrangement of the first speaker 104A and the second speaker 104B is reversed on a desk.

  When the own apparatus is located on the left side of the user, the audio output control unit 110B closes the switches 112A and B, opens the switches 114A and B, and outputs the left channel sound from both the speakers 104A and B. Also, when the own device is located on the right side, the audio output control unit 110B opens the switches 112A and B, closes the switches 114A and B, and outputs the right channel audio from both speakers 104A and B. The audio output control unit 110B outputs the audio of both the left and right channels, outputs the signal of the audio channel corresponding to the center, or does not output the audio when its own device is located at the approximate center with respect to the user. , Etc. can be selected.

  Table 1 shows an example of which channel the first speaker 104A and the second speaker 104B output the audio signal based on the determination results of the position determination unit 120 and the installation state determination unit 122. . That is, in this embodiment, Table 1 is information set in advance. “Left audio” represents left channel audio, and “right audio” represents right channel audio. The “left / right position” in Table 1 is the position of the image display device as viewed from the user.

  In the first posture and the second posture described above, the user is located on the same side as the image display device with respect to the projection surface. On the other hand, an image display device may be installed on the back side of the screen when viewed from the user. In this case, the installation state corresponding to the first posture in which the top plate of the image display device is located above the bottom plate in the gravity direction is represented as “rear” (third posture). The installation state corresponding to the second posture in which the top plate of the image display device is located below the bottom plate in the direction of gravity is represented as “rear / ceiling” (fourth posture). In the third posture and the fourth posture, the user is located on the opposite side of the image display device with respect to the screen.

  FIG. 3A is a perspective view showing a state in which the projection type image display apparatus 100C according to Embodiment 3 of the present invention is placed on a desk, and FIG. 3B is a perspective view showing a state in which it is suspended from the ceiling. PI represents an image area projected on the screen (on the projection surface). In the present embodiment, a case is shown in which a plurality of image display devices 100C project a plurality of images onto a projection surface so as to partially overlap and display one image as a whole.

  In the image region PI, EB indicates an edge blend region that is a region (overlapping region) in which a part of two projection images PI are overlapped. When a plurality of image display devices 100C are arranged and a large projection image is obtained while overlapping a part of the projection image PI, the overlapped region is recognized so that the user can recognize a single large seamless image. Adjust the brightness in steps. This overlapping area is called an edge blend area.

The edge blend area EB of the image display device 100C on the left side of FIG. 3A is adjusted so that the luminance gradually decreases from the left to the right of the screen. The edge blend region EB of the right image display device 100C in FIG. 3A is adjusted so that the luminance gradually increases from the left to the right of the screen S. By combining these two projected images on the screen, the user can recognize a single seamless image.
Note that FIG. 3 shows the projected images PI from the left and right image display devices 100C separated for convenience, but in actual use, they are used in an overlapping manner.

  In this embodiment, the audio output control unit can control the output of the audio signal according to the installation state of the image display device 100C and the position of the edge blend. The user inputs the edge blend setting itself from the operation unit 124.

  FIG. 3C is a configuration diagram of the image display device 100C. The image display device 100C is different from the image display device 100B in that it has an edge blend detection means 128. The edge blend detection means 128 detects whether the edge blend region EB is on the left or right side of the image region by referring to the edge blend setting information input from the operation unit 124 and stored in the storage unit 126. To do. The position determination unit 120 can determine the position of the image display device 100B with respect to the user based on the detection result of the edge blend detection unit 128, that is, using the position information of the edge blend region EB.

  The image display device 100C capable of providing the edge blend region EB on either the left or right side of the image region includes information on which side of the image region the edge blend region EB is on the left or right side in the edge blend setting information. .

  In the case of desktop placement, the position information of the edge blend area EB matches the position of the edge blend in the image area as viewed from the user. In the case of the ceiling suspension, the position information of the edge blend area EB and the position of the edge blend in the image area viewed from the user are reversed. For example, when the edge blend area EB is provided on the right side of the housing of the image display device 100C placed on the desk, the edge blend area EB appears on the left side in the image area PI on the screen as viewed from the user. The position of the edge blend area EB with respect to the housing of the image display device 100C placed on the desk and the information on the installation state are used to determine which side of the image area PI on the screen the edge blend area EB appears on the screen. can do.

  If it is determined on which side of the image region PI on the screen the edge blend region EB appears, it can be determined which of the plurality of image display devices is projecting the edge blend region EB.

  The width of the edge blend area EB can be changed based on a user operation, and the edge blend setting information includes information on the width of the edge blend area EB. The edge blend detection means may determine the position information of the edge blend region EB relative to the housing of the image display device 100C placed on the desk based on the set width value.

  The audio output control unit 110C controls output to the first speaker 104A (SP1) and the second speaker 104B (SP2) according to the installation state of the image display device 100C and the position of the edge blend EB. Table 2 summarizes the results. That is, in this embodiment, Table 2 is information set in advance. “Left audio” represents a left channel audio signal, and “right audio” represents a right channel audio signal.

  With the audio output control shown in Table 2, the user can listen to audio in stereo. For example, when the image display device 100C is placed on the desk and exists on the left side of the user (in the case of “panel right edge blend”), the left channel audio signal is output from both the left and right speakers 104A, B. When the image display device 100C is placed on the desk and exists on the right side of the user (in the case of “panel left edge blend”), the right channel audio signal is output from both the left and right speakers 104A, B. The “panel” represents a liquid crystal panel (light modulation element). When edge blending is not set (when "no edge blending") or when edge blending is set on both the left and right sides of the panel (when "panel left and right edge blending"), the position of the image display device 100C with respect to the user Cannot be determined. In such a case, stereo sound can be provided to the user by not outputting sound from both the left and right speakers. This is because stereo sound is output by the image display device 100C that outputs the left and right end screens.

  When the number of the image display devices 100C is three, the left channel audio signal is arranged on the right side with respect to the user from the image display device arranged on the left side with respect to the user according to the installation state. The right channel audio signal may be output from the image display device.

  The present invention can also be applied when the speaker is separate from the image display device. In this case, the audio output terminal (stereo mini plug) of the image display apparatus and the input terminal of the speaker are connected by a cable. FIG. 4 is a configuration diagram of an image display device 100D according to the fourth embodiment of the present invention. The image display device 100D is different in that the image display device 100C includes a stereo audio output terminal 130 instead of the speakers 104A and 104B, and is otherwise the same as the image display device 100C. The audio output control unit 110D is the same as the audio output control unit 110C.

  The stereo audio output terminal 130 includes a first audio signal output unit 132 and a second audio signal output unit 134, each of which functions as an audio signal output terminal. One end of a cable is connected to each of the first audio signal output unit 132 and the second audio signal output unit 134, and the other end of the cable is connected to an input terminal of an external speaker. The external speaker connected to the first audio signal output unit 132 and the external speaker connected to the second audio signal output unit 134 include the projection optical axis and correspond to both sides with respect to a plane extending in the vertical direction. Provided on the same side as 104A and 104B.

  The audio output control unit 110D controls output to the first audio signal output unit 132 and the second audio signal output unit 134 according to the installation state of the image display device 100D and the position of the edge blend EB. Table 3 summarizes the results. That is, in this embodiment, Table 3 is preset information. “Output unit 1” represents the first audio signal output unit 132, and “output unit 2” represents the second audio signal output unit 134.

  As shown in Table 3, depending on the installation state of the image display device 100D and the position of the edge blend EB, an external speaker connected to the stereo audio output terminal 130 with a cable for audio output that enables the user to listen to audio in stereo. Can be done from.

  FIG. 5 is a configuration diagram of a projection-type image display device 100E according to the fifth embodiment of the present invention. The image display device 100E is configured as a liquid crystal projector, modulates and drives a liquid crystal panel (liquid crystal display element) according to an input signal, and projects (enlarges) an image on a screen (projected surface) (not shown) using light from a light source. Project). The input signal corresponds to the display image.

  The image display device 100E further includes a CPU 140, an image input unit 142, an image processing unit 144, a liquid crystal panel control unit 146, a lamp 148, a liquid crystal panel 150, a projection optical system 152, a zoom lens 154, and a luminance sensor 156. The audio output control unit 110E has the same configuration as the audio output control unit 110B.

  The CPU 140 is composed of a microcomputer and controls the operation of each unit shown in FIG. The image input unit 142 includes a AD converter that converts an analog signal such as a VGA or Video signal into a digital signal, and a receiver that converts a digital signal such as HDMI (registered trademark) or DVI into a predetermined digital signal format. The digital image signal converted by the image input unit 142 is sent to the image processing unit 144. The image processing unit 144 is configured by a dedicated DSP or the like, and reads the resolution of the input image and converts it to a resolution necessary for internal processing, menu display at the time of button operation, and keystone correction (keystone correction) processing Etc.

  The digital signal processed into a predetermined format by the image processing unit 144 is sent to the liquid crystal panel control unit 146 and converted into a liquid crystal drive signal for driving the liquid crystal panel 150. The lamp 148 is an example of a light source that illuminates the liquid crystal panel 150, but is not limited to a lamp such as an LED. The liquid crystal panel 150 is a light modulation element that modulates light from the lamp 148 based on a liquid crystal drive signal. The liquid crystal panel 150 is illuminated via a lamp 148 and an illumination optical system (not shown). The illumination optical system includes a uniformizing element that makes the illuminance distribution uniform, and a color separation unit that separates the illumination light into three colors of RGB, and the color-separated light is irradiated to each of the RGB liquid crystal panels to generate an image signal. Accordingly, the transmittance (reflectance) is changed. A projected image is generated by combining the transmitted light (reflected light) of RGB in the color combining unit.

  The projection optical system 152 and the zoom lens 154 enlarge and project the generated image on the screen. The zoom lens 154 constitutes a part of the projection optical system 152, moves on the optical axis, and changes the focal length.

  The luminance sensor 156 is a luminance measuring unit that measures the luminance of the projection surface. In this embodiment, the CPU 140 and the luminance sensor 156 function as the position determining unit 120 described above. The CPU 140 functions as an acquisition unit that acquires information on the position of the high luminance region in the image projected by each image display device based on the measurement result of the luminance sensor 156. Also in the present embodiment, a plurality of image display devices project a plurality of images onto the projection surface so as to partially overlap each other and display one image as a whole. In this case, the position determination unit 120 determines the position of the image display apparatus 100C with respect to the user based on the information acquired by the CPU 140.

  FIG. 6 is a perspective view for explaining measurement of luminance by the luminance sensor 156. FIG. 6A is a perspective view showing how the luminance sensor 156 measures the luminance of the screen when a single image display device 100E projects an image. FIG. 6B is a perspective view showing how the luminance sensor 156 measures the luminance of the screen S when a plurality (two in this case) of image display devices 100E project an image.

  In FIG. 6A, PI indicates an image area projected by the image display device 100E. SA indicates a detection area where the luminance sensor 156 senses luminance. Note that when the image display apparatus 100E projects an image via the zoom lens 154, the image area PIA changes depending on the zoom position. The detection area SA is set so as to cover an area including the image area PI at the maximum zoom position. Since the detection area SA has no high brightness area other than the image area PI, the CPU 140 determines that the single image display device 100E is projecting an image. The audio output control unit 110E performs, for example, “no edge blending” in Table 2 based on the determination result of the CPU 140.

  6B, PIA indicates an image area projected by the left image display apparatus 100E, and PIB indicates an image area projected by the right image display apparatus 100E. The left image display device 100E performs the luminance measurement, and from the result, it can be determined that the high luminance region H exists next to the projection region of the own device. The high brightness area H is then adjusted in brightness to become an etch blend area EB.

  The CPU 140 of the left image display device 100E can determine from the luminance measurement result by the luminance sensor 156 that the high luminance region H exists on the right side of the detection region SA. When placed on a desk, the CPU 140 can determine that the image display device 100E projects an image on the left side of the entire projection screen as viewed from the user. In the case of a ceiling suspension, when a high brightness area exists at the right end of the detection area, the CPU 140 can determine that the image display device 100E projects an image on the right side of the entire projection screen as viewed from the user.

  The CPU 140 transmits the determination result to the audio output control unit 110E, and the audio output control unit 110E, for example, “panel left edge blend” or “panel right edge blend” in Table 2 based on the determination result of the CPU 140. Take control. When the CPU 140 determines that the high brightness area H exists on both sides of the detection area SA, the audio output control unit 110E performs, for example, control of “panel left and right edge blending” in Table 2. According to the present embodiment, the user can listen to the sound in stereo by judging which side of the projection screen is projected as viewed from the user.

  FIG. 7 is a perspective view of an image display system (electronic device) according to Embodiment 6 of the present invention. The image display system includes two image display devices 100B, an imaging device 200 that captures a projected image, and a personal computer (PC) 220. Note that other image display devices described above may be used instead of the image display device 100B. Each image display device may further have the functions of the imaging device 200 and the PC 220.

  The projection image PIC of the left image display device 100B and the projection image PID of the right image display device 100B are arranged side by side, and a screen having an overlapping region serving as an edge blend region is formed. That is, also in the present embodiment, the plurality of image display devices 100B project a plurality of images onto the projection surface so as to partially overlap each other and display one image as a whole.

  The imaging device 200 is configured by a digital still camera, a digital video camera, or the like. The PC 220 functions as a system control unit that controls the image display system, and is connected to the two image display devices 100B and the imaging device 200 via a cable 240 so as to be able to communicate with each other. The PC 220 is shown as a laptop PC, but is not limited to such as a desktop type. Further, the communication method is not limited to wired, and may be wireless.

  FIG. 8 is a flowchart for explaining a control method in which the PC 220 executes the following steps in order to control the output of the audio signal of each image display device 100B, and “S” represents a step. The control method shown in FIG. 8 can be embodied as a program for causing a computer to execute the function of each step.

  First, in S <b> 11, with all the image display devices 100 </ b> B projecting images, the PC 220 transmits an imaging command to the imaging device 200 and acquires the captured image A from the imaging device 200. Next, in S12, the PC 220 transmits a command to change the luminance to the left image display device 100B. Next, in S <b> 13, the PC 220 transmits an imaging command to the imaging apparatus 200 and acquires the captured image B from the imaging apparatus 200.

  Next, in S14, the PC 220 transmits a command for returning the luminance to the left image display device 100B. Next, in S15, the PC 220 compares the captured images A and B, and transmits position information on the entire projected image in the region where the luminance change has occurred to the left image display device 100B.

  Next, in S16, the PC 220 transmits a command to change the luminance to the right image display device 100B. Next, in S <b> 17, the PC 220 transmits an imaging command to the imaging apparatus 200 and acquires the captured image C from the imaging apparatus 200. Next, in S18, the PC 220 transmits a command to restore the brightness to the right image display device 100B. Next, in S19, the captured images A and C are compared, and position information for the entire projected image in the region where the luminance change has occurred is transmitted to the right image display device 100B.

  If the number of image display devices is two, information on the opposite side (for example, information indicating the right side of the screen) from the position information (for example, information indicating the left side of the screen) acquired in S15 is used as the right image display device. S16 to S19 may be omitted.

  As described above, the PC 220 changes the brightness of an image projected by at least one of the plurality of image display devices, and the entire projected surface before and after changing the brightness in the first step to the imaging device 200. A second step of capturing an image is executed. In addition, the PC 220 obtains information indicating which part of the entire image projected on the projection surface changes by comparing the imaging results obtained in the second step and the third step. A fourth step of transmitting information to the corresponding image display device is executed. The position determination unit 120 determines the position of the image display device with respect to the user using the information acquired in the fourth step.

  According to the present embodiment, the audio output control unit 110B of each image display device 100B can perform output control so that the user can listen to audio in stereo according to the installation state and the position information notified from the PC 220. it can.

  In this embodiment, a case where a plurality of displays are arranged side by side to display one image will be described. Each display includes a built-in speaker (or audio output terminal), and has, for example, a configuration in which the installation state determination unit 122 is removed from the configuration illustrated in FIG. 2A and a display unit that displays an image. However, since the display screen faces the user, it is in the third posture. When arranging a plurality of displays, there is no edge blend region EB. Each audio output control unit controls audio output based on information input by the user. Note that this embodiment can also be applied to electronic devices of game machines such as a smart phone having a display means, a mobile phone, a PDA, and a laptop PC.

  FIG. 9 is a diagram illustrating an example of an operation screen (on-screen screen) 125 configuring the operation unit 124. On the operation screen 125, the user selects an arrangement pattern of a plurality of displays. For example, the user can select from the choices of two (1 × 2) patterns 125a horizontally, three (1 × 3) patterns 125b horizontally, and two (2 × 2) patterns 125c each horizontally (2 × 2) patterns 125c. Make a selection. Furthermore, in the selected arrangement pattern (here, two patterns 125a horizontally), which part of the screen the display constitutes is selected from the submenu 125d. By such a user's selection, the position of the display in the arrangement of the plurality of displays can be determined.

  When a user views a screen composed of a plurality of displays from the front, the display existing from the left in the arrangement of the plurality of displays is positioned on the left side of the user and the display existing on the right is positioned on the right side of the user. For this reason, when the display is arranged on the left side of the plurality of displays, the audio output control unit outputs the left channel sound from the left and right speakers of the display. When the display is arranged on the right side of the plurality of displays, the sound output control unit outputs the right channel sound from the left and right speakers of the display. In addition, the audio output control unit outputs the right channel sound from the right speaker viewed from the user and the left channel sound output from the left speaker viewed from the user when the display is arranged in the center of the plurality of displays, or the audio Do not output.

  According to this embodiment, left channel sound is output from the left side of the user and right channel sound is output from the right side of the user, and the user can listen to the sound in stereo.

  Note that, in the PC connected to the display, the information shown in FIG. 9 may be set and transmitted from the PC to the display, and the audio output control unit may switch the audio channel based on the information.

  As mentioned above, although the Example of this invention was described, this invention is not limited to these Examples, A various deformation | transformation and change are possible within the range of the summary. For example, in the present invention, the number of channels is not limited.

  The present invention can be applied to applications of electronic devices such as image display devices such as projectors and displays, smart phones, mobile phones, PDAs, and laptop PCs.

100A to 100E: Image display device (electronic device), 101A: Left channel audio input unit (audio signal processing unit), 101B: Right channel audio input unit (audio signal processing unit), 104, 104A, B ... Speaker (audio output) Means), 110A to 110E ... voice output control unit (sound output control means) 120 ... position discrimination means

Claims (14)

An electronic device that outputs sound,
Position determining means for determining the position of the electronic device with respect to a predetermined position;
Audio signal processing means for outputting a drive signal for driving the audio output means based on the input signal;
Of the left sound and right sound, the sound corresponding to the position of the electronic device determined by the position determining means is output from the sound output means, and the sound not corresponding to the position of the electronic device is output from the sound output means. Audio output control means for controlling connection and disconnection of the audio signal processing means and the audio output means so as not to be output;
An electronic device comprising: The electronic device can display an image,
The electronic device according to claim 1, wherein the plurality of electronic devices can output a plurality of images to form one image as a whole.   When the sound output control means determines that the position of the electronic device determined by the position determination means extends in a direction perpendicular to the direction of gravity and the surface displaying the image, and is on a plane including the predetermined position, 3. The electronic apparatus according to claim 2, wherein the connection and disconnection are controlled such that no sound is output from the sound output means, or both the left sound and the right sound are output. . An installation state determining unit that determines whether the electronic device is in a first posture or a second posture that is upside down with respect to the first posture;
4. The electronic device according to claim 1, wherein the audio output control unit controls the connection and disconnection further based on a determination result of the installation state determination unit. 5. The electronic device is an image display device that projects an image on a projection surface.
The electronic apparatus according to claim 4, wherein the installation state determination unit further determines whether the electronic apparatus and the predetermined position are on the same side or the opposite side with respect to the projection surface.   The electronic apparatus according to claim 1, further comprising the audio output unit.   The electronic apparatus according to claim 6, wherein a plurality of audio output units are provided, and each audio output unit can output both the left audio and the right audio.   The electronic apparatus according to claim 1, further comprising an output terminal connected to the audio output unit.   The electronic device is an image display device that projects an image on a projection surface, and a plurality of image display devices project a plurality of images onto the projection surface so that a part of the images overlap, thereby displaying one image as a whole. 9. The device according to claim 1, wherein the position determination unit determines the position of the electronic device using information on a position of an overlapping region of the images. Electronic equipment. Brightness measuring means for measuring the brightness of the projected surface; and acquisition means for acquiring information on the position of the high brightness area as the overlapping area based on the measurement result of the brightness measuring means;
The electronic device according to claim 9, wherein the position determination unit determines a position of the electronic device based on information acquired by the acquisition unit.   The electronic device is an image display device that projects an image on a projection surface, and a plurality of image display devices project a plurality of images onto the projection surface so that a part of the images overlap, thereby displaying one image as a whole. In this case, the position determination unit uses information indicating which part of the one image changes when the luminance of the image projected by at least one of the plurality of image display devices is changed. The electronic device according to claim 1, wherein a position of the electronic device is determined.   The electronic apparatus according to claim 2, further comprising display means for displaying the image. Each of the electronic devices includes a plurality of image display devices that project an image on a projection surface and output sound, a computer, and an imaging device.
The image display device includes:
Position determining means for determining the position of the image display device;
Audio signal processing means for outputting a drive signal for driving the audio output means based on the input signal;
Of the left and right sounds, the sound corresponding to the position of the image display device determined by the position determining means is output from the sound output means, and the sound not corresponding to the position of the electronic device is the sound output means. Audio output control means for controlling connection and disconnection of the audio signal processing means and the audio output means so as not to be output from
Have
The computer changes the luminance of an image projected by at least one of the plurality of image display devices, causes the imaging device to take the one image before and after changing the luminance, and compares the imaging results. , Obtaining information indicating which part of the one image changes,
The electronic apparatus according to claim 1, wherein the position determination unit determines the position of the image display device using the information acquired by the computer. A plurality of image display devices that each project an image on a projection surface and output sound, and an imaging device, and an electronic device control method,
The image display device includes:
Position determining means for determining the position of the image display device;
Audio signal processing means for outputting a drive signal for driving the audio output means based on the input signal;
Of the left and right sounds, the sound corresponding to the position of the image display device determined by the position determining means is output from the sound output means, and the sound not corresponding to the position of the electronic device is the sound output means. Audio output control means for controlling connection and disconnection of the audio signal processing means and the audio output means so as not to be output from
Have
The control method is:
A first step of changing a luminance of an image projected by at least one of the plurality of image display devices;
A second step of causing the imaging device to capture the one image before and after changing the luminance in the first step;
A third step of obtaining information indicating which part of the one image changes by comparing the imaging results of the second step;
A fourth step of transmitting the information acquired in the third step to a corresponding image display device;
Have
The method of controlling an electronic device, wherein the position determining unit determines the position of the image display device using the information acquired in the fourth step.