Sound control device and sound control method
By using an angle detector and controller in the vehicle cabin to adjust speaker settings, the problem of inconsistent sound caused by the tilt angle of the display panel was solved, ensuring a consistent auditory experience for passengers in different positions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DENSO TEN LTD
- Filing Date
- 2022-03-18
- Publication Date
- 2026-06-19
Smart Images
Figure CN116331113B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a sound control device and a sound control method. Background Technology
[0002] Examples of in-vehicle audio-visual equipment as voice control devices include rear-seat entertainment systems (RES) for enjoying videos such as TVs and DVDs in the rear seats of a vehicle cabin, and the rear-seat entertainment system is independent of the entertainment system located in the front seats (see, for example, JP-A-2017-222276). The RES includes, for example, a foldable display device, having a base mounted on a portion of the vehicle's roof and a display panel supported by the base in a manner in which the display panel is tilted relative to the base. Summary of the Invention
[0003] A foldable display device has a speaker integrated into the display panel, allowing people to listen to sound without using speakers or headphones installed in the vehicle. However, in this display device, for example, when three rows of seats are arranged in the vehicle cabin, the tilt angle of the display panel differs between the second and third rows of rear seats. Therefore, even if the same quality sound is output from the speaker, the sound heard by passengers in the second and third rows will be different.
[0004] The tilt angle of the second-row seats is the angle at which the display panel is positioned relative to the average head height of the second-row passengers. Specifically, it is the angle at which the line extending from the center of the display panel in the plan view, when viewed from the side, passes through the head position of the second-row passengers. However, the tilt angle of the second-row seats does not need to be exactly the same as the angle at which the display panel is positioned relative to the average head height of the second-row passengers. The tilt angle of the second-row seats may deviate from this angle within a certain range (e.g., approximately ±20°). The tilt angle of the third-row seats is the angle at which the display panel is positioned relative to the average head height of the third-row passengers. Specifically, it is the angle at which the line extending from the center of the display panel in the plan view, when viewed from the side, passes through the head position of the third-row passengers. However, the tilt angle of the third-row seats does not need to be exactly the same as the angle at which the display panel is positioned relative to the average head height of the third-row passengers. The tilt angle of the third-row seats may deviate from this angle within a certain range (e.g., approximately ±20°).
[0005] One aspect of the invention relates to providing passengers with sound of appropriate quality by reducing the influence of the angle of the display panel.
[0006] According to one aspect of the present invention, a sound control device is provided, comprising: a display panel supported by a base disposed in a vehicle such that the angle of the display panel relative to the base is variable; an angle detector configured to detect the angle; and a controller configured to change the sound settings in the vehicle's cabin according to the angle.
[0007] According to the sound control device of the present invention, sound of appropriate quality can be provided to passengers by reducing the influence of the angle of the display panel. Attached Figure Description
[0008] Figure 1 This is a diagram illustrating the configuration of an in-vehicle audio display device, which is an example of a voice control device according to an embodiment.
[0009] Figure 2 This is a diagram showing the arrangement of the various parts of the in-vehicle audio display device in a vehicle.
[0010] Figure 3 This diagram shows the base, rotating mechanism, and display panel of the in-vehicle audio display device.
[0011] Figure 4 This is a diagram showing the detailed configuration of the DSP.
[0012] Figure 5 This is a flowchart illustrating the processing of an in-vehicle audio display device according to an embodiment.
[0013] Figure 6A and Figure 6B This is a flowchart illustrating the processing details in the sound settings change step.
[0014] Figures 7A to 7C This is a diagram showing an example (part 1) of the rotation of the display panel 30.
[0015] Figure 8A and Figure 8B This is a diagram showing an example (part 2) of the rotation of the display panel 30.
[0016] Figure 9A and Figure 9B This is a diagram showing an example (part 3) of the rotation of the display panel 30. Detailed Implementation
[0017] In the following description, the sound control device and sound control method according to the present invention will be described with reference to the accompanying drawings.
[0018] <Example>
[0019] (System Configuration)
[0020] Figure 1This is a diagram illustrating the configuration of an in-vehicle audio display device, which is an example of a voice control device according to an embodiment. Figure 2 This is a diagram showing the configuration of the various parts of the in-vehicle audio display device in a vehicle.
[0021] The in-vehicle audio display device 1 is, for example, a device called an RSE installed in the vehicle 60. The RSE provides video and audio content, such as those from media like television broadcasts or digital multi-disc (DVD), to passengers in the rear seats of the vehicle cabin. This content is provided to the RSE from external devices. External devices are, for example, navigation devices installed in the vehicle 60. Alternatively, external devices could be passengers' smartphones or tablet terminals.
[0022] In this embodiment, vehicle 60 is, for example, a 7-seater minivan, and includes the vehicle 60 in the rear-facing direction within the vehicle cabin. Figure 2 Three rows of seats 61 to 67 are arranged in the y-direction (as shown). Of the seats 61 to 67, the first row seats 61 and 62 are the front seats, and the second row seats 63 and 64 and the third row seats 65 to 67 are the rear seats. The first row seats 61 and 62 are located in the left-right direction of the vehicle 60, which is orthogonal to the longitudinal direction (as shown). Figure 2 The seats are arranged side-by-side in the x-direction shown. The second-row seats 63 and 64 and the third-row seats 65 to 67 are also arranged side-by-side in the left-right direction.
[0023] The in-vehicle audio display device 1 includes a base 10, a rotating mechanism 20, a display panel 30, second-row seat speakers 41 and 42, and third-row seat speakers 51 and 52.
[0024] The combination of the base 10, rotating mechanism 20, and display panel 30 in the in-vehicle audio display device 1 is a display device used to provide video to rear-seat passengers. For example... Figure 2 As shown, the display device is positioned in the front-rear direction between the first row seats 61 and 62 and the second row seats 63 and 64, and in the left-right direction between seats 63 and 64. The base 10, the rotating mechanism 20, and the display panel 30 are mounted on the vehicle 60 in the vertical direction orthogonal to the front-rear and left-right directions (see Figure 10). Figures 7A to 9B The roof section above the passenger compartment of the vehicle (in the z-direction).
[0025] Figure 3 This is a diagram showing the appearance of the base 10, the rotating mechanism 20, and the display panel 30 of the vehicle-mounted audio display device 1. Figure 3 The display panel 30 is shown in an open state relative to the base 10.
[0026] The base 10 supports the display panel 30 and has a generally rectangular housing. The housing of the base 10 is fixed to the roof portion in the vehicle's cabin. Electronic devices, etc., for driving the display panel 30, which will be described later, are housed in the housing of the base 10. The base 10 has a width direction consistent with the left-right direction of the vehicle 60. Figure 3 The x-direction in the middle, and the depth direction consistent with the front-rear direction of the vehicle (60). Figure 3 The v-direction in the middle) and the thickness direction, which is orthogonal to the width and depth directions and consistent with the vertical direction of the vehicle 60 (in the middle) Figure 3 (in the z direction). A lock 10a is provided at one end in the depth direction and at the center of the width direction of the base 10 to hold the display panel 30 closed relative to the base 10. A rotation mechanism 20 is provided as part of the base 10 at each of the other end in the depth direction and the two ends in the width direction of the base 10.
[0027] The rotating mechanism 20 rotates the display panel 30 and includes a rotating shaft, a drive motor, various gears, a clutch, etc. The rotating mechanism 20 supports the display panel 30 by clamping it in the width direction of the base 10. The rotating mechanism 20 causes each part of the display panel 30 to rotate... Figure 3 The display panel 30 can rotate in the yz plane about a rotation axis extending in the width direction of the base 10. Therefore, it is possible to change the display panel 30 from a state where it overlaps with the base 10 and is closed relative to the base 10 to a state where the display panel 30 is tilted towards the rear seat or tilted downwards towards the base 10 and open relative to the base 10 in the vehicle cabin, such as... Figure 3 As shown in the diagram, the angle of the display panel 30 relative to the base 10 can be changed. Therefore, it can be said that the display panel 30 is supported by the base 10 in such a way that the angle of the display panel 30 relative to the base 10 can be changed by the rotation mechanism 20.
[0028] The closed state of the display panel 30 can be considered as the folded state of the display device. Therefore, the combination of the base 10, the rotating mechanism 20, and the display panel 30 can be considered as a foldable display device. Furthermore, since the combination of the base 10, the rotating mechanism 20, and the display panel 30 is suspended from the ceiling portion in the vehicle cabin, it can be said that the combination of the base 10, the rotating mechanism 20, and the display panel 30 is a suspended display device.
[0029] The display panel 30 includes a generally rectangular housing and a display unit 31 incorporated within the housing, such as an organic electroluminescent display (OELD, organic EL display) or a liquid crystal display (LCD). The display surface 31a of the display unit 31 faces the base 10 (the roof of the vehicle 60) when the display panel 30 is closed, and faces the rear seat passengers of the vehicle 60 when the display panel 30 is open (see [reference]). Figure 7B and Figure 7C ).
[0030] In addition, the display panel 30 includes, for example Figure 1 The actuator 32 is shown. The actuator 32 outputs sound by vibrating the display unit 31 and is disposed in the housing of the display panel 30 on the side opposite to the display surface 31a of the display unit 31. For example, the actuator 32 is fixed to the surface opposite to the display surface 31a by adhesive. The actuator 32 is, for example, a piezoelectric element. Alternatively, the actuator 32 can be a vibrating element such as a solenoid. In this embodiment, the actuator 32 and the display unit 31 form a display panel speaker for the display panel 30. The display panel speaker is an example of a first speaker.
[0031] The display panel 30 includes an angle sensor 33. The angle sensor 33 detects the angle of the display panel 30 relative to the base 10 and is disposed within the housing of the display panel 30. The angle sensor 33 is, for example, a gyroscope sensor (rotary machinery accelerometer). Alternatively, the angle sensor 33 can be a vibration-type accelerometer. The angle sensor 33 can also be a rotary encoder. The angle sensor 33 outputs a detection signal indicating the detected angle of the display panel 30 to the control unit 13, which will be described later. The angle sensor 33 is an example of an angle detector.
[0032] In the in-vehicle audio display device 1, the second-row seat speakers 41 and 42 are primarily used to provide sound to the passengers in the second-row seats 63 and 64. For example... Figure 2As shown, second-row seat speakers 41 and 42 are mounted on the sides of the second-row seats 63 and 64 in the vehicle cabin. Specifically, second-row seat speakers 41 and 42 are positioned between the first-row seats 61 and 62 and the second-row seats 63 and 64 in the longitudinal direction of the vehicle 60, and on the right side of the right seat 63 and the left side of the left seat 64 in the left-right direction of the vehicle cabin. Furthermore, third-row seat speakers 51 and 52 are speakers primarily used to provide sound to passengers in the third-row seats 65 to 67. Third-row seat speakers 51 and 52 are mounted on the sides of the third-row seats 65 and 67 in the vehicle cabin. Specifically, third-row seat speakers 51 and 52 are positioned between the second-row seats 63 and 64 and the third-row seats 65 to 67 in the longitudinal direction, and on the right side of the right seat 65 and the left side of the left seat 67 in the left-right direction of the vehicle cabin. Hereinafter, second-row seat speakers 41 and 42 and third-row seat speakers 51 and 52 are also collectively referred to as vehicle speakers. Vehicle speakers are examples of second speakers that differ from first speakers.
[0033] Next, we will refer to Figure 1 The description includes electronic devices, etc., installed in the housing of the base 10 and used to drive the display panel 30. Signal input unit 11, operation unit 12, control unit 13, auxiliary storage unit 14, rotation drive circuit 15, display drive circuit 16, digital signal processor (DSP) 17, D / A converters 18a to 18c, and amplifiers 19a to 19c are installed in the housing of the base 10.
[0034] The signal input unit 11 receives video signals, audio signals, etc., from external devices such as navigation devices, and outputs these signals to the control unit 13. The signal input unit 11 is an input terminal into which a cable such as a High Definition Multimedia Interface (HDMI: registered trademark) or Universal Serial Bus (USB) is inserted.
[0035] The operation unit 12 recognizes user input operations on the in-vehicle audio display device 1 and outputs a signal corresponding to the input operation to the control unit 13. Input operations include, for example, turning the power to the in-vehicle audio display device 1 on or off; setting the orientation of the display panel 30 (the angle of the display panel 30 relative to the base 10), including turning it on and off; switching the content to be output to the display panel 30; adjusting the image quality; adjusting the volume, etc. The operation unit 12 may be, for example, a remote control, an input button, an input lever, a touch panel, or a combination of a remote control, an input button, an input lever, and a touch panel.
[0036] The control unit 13 includes, for example, a central processing unit (CPU) and a main storage unit. The CPU executes a computer program loaded in the main storage unit, enabling the CPU to execute the computer program and provide the functions of the in-vehicle audio display device 1. The main storage unit stores the computer program to be executed by the CPU, data to be processed by the CPU, etc. The CPU is also called a processor. The CPU is not limited to a single processor and can have a multi-processor configuration. Furthermore, the CPU can be a single processor connected through a single socket and can have a multi-core configuration. Through these processes, the control unit 13 receives operations from the user, who is a passenger, via the operation unit 12, and provides various functions to the user based on the user's operations. For example, when the control unit 13 receives an operation related to the posture of the display panel 30 from the user via the operation unit 12, the control unit 13 outputs a rotation command signal related to the posture of the display panel 30 to the rotation drive circuit 15. When the control unit 13 receives an operation related to content switching from the user, the control unit 13 outputs the video signal of the switched content to the display drive circuit 16 and the audio signal of the content to the DSP 17.
[0037] The control unit 13 receives the angle of the display panel 30 detected by the angle sensor 33 and changes the sound settings of the sound signals to be output to the display panel speaker and the vehicle speaker according to the angle. When the control unit 13 changes the sound settings, the control unit 13 generates a change signal including appropriate values of the sound settings corresponding to the angle of the display panel 30 based on the sound setting table stored in the auxiliary storage unit 14, which will be described later, and outputs the change signal to the DSP 17.
[0038] The auxiliary storage unit 14 stores various parameters related to the posture, sound output, etc. of the display panel 30. For example, the auxiliary storage unit 14 stores the standard angle values of the display panel 30 relative to the base 10 for the second row seats 63 and 64, and the standard angle values of the display panel 30 relative to the base 10 for the third row seats 65 to 67.
[0039] Here, the standard angle of the second-row seats 63 and 64 is the angle (e.g., 90° + 20°) at the average head height of the passengers in the second-row seats 63 and 64 when the display panel 30 is directly opposite to them. That is, the angle of the second-row seats 63 and 64 is the angle at which a line extending from the center of the display panel along the normal direction passes through the head position of the passengers in the second-row seats 63 and 64 in a plan view of the vehicle 60 viewed from the side. However, the angle of the second-row seats 63 and 64 does not need to be exactly the same as the angle at which the display panel 30 is directly opposite to the average head height of the passengers in the second-row seats 63 and 64. The angle of the second-row seats 63 and 64 may deviate from the angle at which the display panel 30 is directly opposite to the average head height of the passengers in the second-row seats 63 and 64 within a certain range (e.g., approximately ±20°). The standard angle of the third-row seats 65 to 67 is the angle (e.g., 90°) at the average head height of the passengers in the third-row seats 65 to 67 when the display panel 30 is directly opposite to them. That is, the angle of the third-row seats 65 to 67 is the angle at which a line extending along the normal direction from the center of the display panel 30 passes through the head position of the passengers in the third-row seats 65 to 67 in a plan view when the vehicle 60 is viewed from the side. However, the angle of the third-row seats 65 to 67 does not need to be exactly the same as the angle at which the display panel 30 is directly opposite the average head height of the passengers in the third-row seats 65 to 67. The angle of the third-row seats 65 to 67 may deviate from the angle at which the display panel 30 is directly opposite the average head height of the passengers in the third-row seats 65 to 67 within a certain range (e.g., approximately ±20°).
[0040] For each of the display panel speaker and the vehicle speaker, the auxiliary storage unit 14 stores a table in which appropriate values for the sound settings of the display panel 30 at each predetermined angle (e.g., 5°) are listed. The sound settings are settings for the gain, phase, delay, and frequency characteristics of the sound output from each of the display panel speaker and the vehicle speaker. Appropriate values for the sound settings are determined, for example, based on the results of sound measurements in the vehicle cabin for each vehicle type. Here, for example, the case where the support shaft (also called the hinge) for opening and closing the display panel 30 is located at the front of the vehicle 60 in the base 10 will be described. For example, for appropriate gain values, the gain value of the sound signal output to the display panel speaker is larger when the angle of the display panel 30 relative to the base 10 is close to the angle of the third-row seats 65 to 67 (e.g., 90°). Furthermore, when the angle of the display panel 30 changes from the angle of the third-row seats 65 to 67 to an angle closer to the angle of the second-row seats 63 and 64 (e.g., 90° + 20°), the gain of the audio signal output to the display panel speaker is relatively small when the display panel 30 is open. When the angle of the display panel 30 is closer to the angle of the third-row seats 65 to 67, the gain of the audio signal output to the third-row seat speakers 51 and 52 is relatively large. Furthermore, when the angle of the display panel 30 changes from the angle of the third-row seats 65 to 67 to an angle closer to the angle of the second-row seats 63 and 64, the gain of the audio signal output to the second-row seat speakers 41 and 42 is relatively large as the display panel 30 is opened. The auxiliary storage unit 14 is, for example, flash memory. Alternatively, the auxiliary storage unit 14 can be a general non-volatile memory called an electrically erasable programmable read-only memory (EEPROM).
[0041] When the rotation drive circuit 15 receives a rotation command signal from the control unit 13, it generates a command value related to the rotation of the display panel 30 based on the rotation command signal. The rotation drive circuit 15 includes an amplifier. The rotation drive circuit 15 amplifies the command value via the amplifier, generates a rotation drive signal, and outputs the rotation drive signal to the rotation mechanism 20. Therefore, the rotation mechanism 20 rotates the display panel 30 to the posture described by the user operation related to the posture of the display panel 30.
[0042] The display driving circuit 16 receives video signals from the control unit 13, generates display driving signals for driving the display unit 31 of the display panel 30 based on the video signals, and outputs the display driving signals to the display unit 31. Therefore, the display unit 31 displays video.
[0043] The DSP 17 receives the audio signal from the control unit 13 and performs predetermined processing on the audio signal (see, for example, JP-A-2009-17094).
[0044] Figure 4 This is a diagram showing the detailed configuration of DSP 17. (See diagram below.) Figure 4 As shown, the DSP 17 includes a gain adjustment circuit 17a, a phase adjustment circuit 17b, a delay adjustment circuit 17c, a left / right balance adjustment circuit 17d, and a frequency response adjustment circuit 17e. The gain adjustment circuit 17a adjusts the gain of the sound output from each of the display panel speakers and vehicle speakers. The phase adjustment circuit 17b adjusts the phase of the sound output from each of the display panel speakers and vehicle speakers. The delay adjustment circuit 17c adjusts the delay of the sound output from each of the display panel speakers and vehicle speakers. The left / right balance adjustment circuit 17d adjusts the left / right balance of the sound output from each of the display panel speakers and vehicle speakers. The frequency response adjustment circuit 17e adjusts the frequency response of the sound output from each of the display panel speakers and vehicle speakers. The DSP 17 causes the adjustment circuits 17a to 17e to perform predetermined sound adjustment processing on the sound signal, generate a processed sound signal, and output the processed sound signal to D / A converters 18a to 18c. In addition to the adjustment circuits 17a to 17e, the DSP 17 may also include: a finite impulse response (FIR) filter that performs filtering processing, and an adder circuit that adds the segmented audio signals together to perform various processing.
[0045] When the DSP 17 receives a change signal from the control unit 13, the DSP 17 performs sound setting of the sound signal based on the appropriate value of the sound setting included in the change signal, generates a sound processing signal, and outputs the sound processing signal to the D / A converters 18a to 18c.
[0046] D / A converters 18a to 18c convert the audio processing signal, which is a digital signal, into an analog signal and output the analog signal to amplifiers 19a to 19c. Amplifier 19a amplifies the analog signal, generates an actuator drive signal, and outputs the actuator drive signal to actuator 32. Actuator 32 responds to the actuator drive signal to drive display unit 31, causing display unit 31 to vibrate. Therefore, sound is output from display unit 31. Amplifier 19b amplifies the analog signal and outputs the amplified analog signal to second-row seat speakers 41 and 42. Therefore, sound is output from second-row seat speakers 41 and 42. Amplifier 19c amplifies the analog signal and outputs the amplified analog signal to third-row seat speakers 51 and 52. Therefore, sound is output from third-row seat speakers 51 and 52.
[0047] (Processing flow)
[0048] Figure 5This is a flowchart illustrating the processing of the in-vehicle audio display device 1 according to this embodiment. Figure 6A and Figure 6B This is a flowchart illustrating the processing details in the sound setting change steps. These processes are performed by the control unit 13.
[0049] In the process of S11, when the display panel 30 is closed relative to the base 10, the control unit 13 first determines whether the display panel 30 is open (S11). Specifically, when the control unit 13 receives an operation related to the posture of the display panel 30 from the user via the operation unit 12, the control unit 13 unlocks the lock 10a of the base 10. When the control unit 13 detects that the lock 10a is unlocked, the control unit 13 determines that the display panel 30 is open.
[0050] The control unit 13 outputs a rotation command signal related to the posture of the display panel 30 to the rotation drive circuit 15. When the rotation drive circuit 15 receives the rotation command signal from the control unit 13, it generates a rotation drive signal based on the rotation command signal and outputs the rotation drive signal to the rotation mechanism 20. When the rotation mechanism 20 receives the rotation drive signal from the rotation drive circuit 15, it rotates the display panel 30 to a posture corresponding to the operation related to the posture of the display panel 30.
[0051] When it is determined in S11 that the display panel 30 is open (yes), the control unit 13 detects that the rotation of the display panel 30 has stopped. After that, the control unit 13 receives the detection signal from the angle sensor 33 and detects the angle of the display panel 30 relative to the base 10 (S12).
[0052] Subsequently, the control unit 13 changes the sound settings of the sound signals to be output to each of the display panel speakers and vehicle speakers according to the angle of the display panel 30 (S13). Details of the sound setting change process will be described later.
[0053] After changing the sound settings, the control unit 13 determines whether the display panel 30 has rotated (S14). Specifically, when the control unit 13 receives an operation related to the posture of the display panel 30 from the user via the operation unit 12, the control unit 13 outputs a rotation command signal related to the posture of the display panel 30 to the rotation drive circuit 15 in a manner similar to the processing in S11. Therefore, the rotation mechanism 20 rotates the display panel 30 to the posture corresponding to the operation related to the posture of the display panel 30. Thus, the control unit 13 determines that the display panel 30 has been rotated.
[0054] When it is determined in S14 that the display panel 30 is rotating (yes), the control unit 13 determines whether the display panel 30 is closed after the control unit 13 detects that the rotation of the display panel 30 has stopped (S15). Specifically, when the control unit 13 detects that the display panel 30 is closed and the lock 10a of the base 10 is locked, the control unit 13 determines that the display panel 30 is closed.
[0055] When it is determined in S15 that the display panel 30 is not turned off (No), the process proceeds to S12, and the control unit 13 receives the detection signal from the angle sensor 33 and detects the angle of the display panel 30 relative to the base 10. Then, the control unit 13 changes the sound setting of the sound signal to be output to each of the display panel speaker and the vehicle speaker according to the angle of the display panel 30 (S13).
[0056] On the other hand, when it is determined in S15 that the display panel 30 is off (yes), the control unit 13 ends the sound setting change process.
[0057] Next, we will refer to Figures 7A to 9B Describe the details of the sound setting change processing in S13. Figures 7A to 9B This is a diagram showing an example of rotating the display panel 30. Figure 7A The diagram shows the state where the angle between the display panel 30 and the base 10 is approximately 0° and the display panel 30 is closed relative to the base 10. Figure 7B The diagram shows the display panel 30 open and at an angle (e.g., 90°) relative to the base 10, directly facing the heads of the passengers 71 in the third row seats 65 to 67. Figure 7B The image shows the display panel 30 in a standard angle (posture) relative to the third-row seats 65 to 67. This posture of the display panel 30 is one in which the display surface 31a faces the rear of the vehicle 60 and the passengers 71 of the third-row seats 65 to 67 can easily view the video. Figure 7C The diagram shows the display panel 30 further opened and at an angle relative to the base 10 exceeding the angle relative to the third-row seats 65 to 67. Specifically, the angle of the display panel 30 is the angle at which the display panel 30 faces the heads of the passengers 72 in the second-row seats 63 and 64 (e.g., 90° + 20°). In other words, Figure 7C The image shows the display panel 30 in a standard angle (posture) relative to the second-row seats 63 and 64. This posture of the display panel 30 is one in which the display surface 31a of the display unit 31 faces downwards at an angle, allowing passengers 72 of the second-row seats 63 and 64 to easily view the video. Figure 8A and Figure 9B With Figure 7AA similar manner shows the display panel 30 in a standard position relative to the third-row seats 65 to 67. Furthermore, Figure 8B and Figure 9A With Figure 7B A similar manner is shown with the display panel 30 in a standard position relative to the second-row seats 63 and 64.
[0058] In the processing of S21, after detecting the angle of the display panel 30 relative to the base 10 in S12, the control unit 13 first determines whether the angle of the display panel 30 after rotation is as follows: Figure 6A The angle of the third-row seats is shown in S21. Specifically, the control unit 13 compares the detected angle value of the display panel 30 with the angle values of the display panels 30 of the third-row seats 65 to 67 stored in the auxiliary storage unit 14, and determines whether the angle after the display panel 30 is rotated is the angle of the third-row seats 65 to 67. When it is determined in S21 that the angle after the display panel 30 is rotated is not the angle of the third-row seats 65 to 67 (no), the process proceeds to... Figure 6B S31 in the middle.
[0059] On the other hand, when it is determined in S21 that the angle of the display panel 30 after rotation is the angle of the third row seat (65 to 67 degrees), the control unit 13 determines whether the display panel 30 was turned off before rotation (S22). Specifically, the control unit 13 stores the angle of the display panel 30 before rotation and determines whether the display panel 30 was turned off before rotation based on the stored angle of the display panel 30.
[0060] When it is determined in S22 that the display panel 30 is closed before rotation (Yes), the control unit 13 increases the gain of the audio signal to be output to the display panel speaker (S23). When the angle of the display panel 30 relative to the base 10 approaches the angle of the third-row seats 65 to 67, the control unit 13 increases the gain of the audio signal to be output to the display panel speaker. Here, the angle of the third-row seats 65 to 67 is the angle (e.g., 90°) at which the display panel 30 faces the head of the passenger 71 in the third-row seats 65 to 67. In this case, the display panel 30... Figure 7A The closed state shown has changed to Figure 7BThe display panel 30 is in the open state shown, and its angle is closer to the angle of the third-row seat (65-67 degrees) than before the display panel 30 was rotated. Therefore, the control unit 13 increases the gain of the audio signal to be output to the display panel speaker to be greater than the gain before the display panel 30 was rotated. Specifically, based on a table stored in the auxiliary storage unit 14, the control unit 13 changes the gain value of the display panel speaker corresponding to the angle before the display panel 30 was rotated to the gain value of the display panel speaker corresponding to the angle after the display panel 30 was rotated. Then, the control unit 13 generates a change signal including the gain value of the display panel speaker corresponding to the angle after the display panel 30 was rotated, and outputs the change signal to the DSP 17.
[0061] Therefore, the DSP 17 causes the gain adjustment circuit 17a to generate a sound processing signal by increasing the gain of the sound signal based on the gain value of the display panel speaker included in the changing signal, and outputs the sound processing signal to the D / A converter 18a. Thus, a sound with a relatively large volume is output from the display panel speaker (display unit 31 and actuator 32). Therefore, a sound with an appropriate volume can be provided to passengers 71 in the third row of seats 65 to 67, which are relatively far from the display panel 30.
[0062] Subsequently, the control unit 13 increases the gain of the sound signals to be output to the third-row seat speakers 51 and 52 in the vehicle speakers (S24). When the angle of the display panel 30 relative to the base 10 is close to the angle of the third-row seat 65 to 67, the control unit 13 increases the gain of the sound signals to be output to the third-row seat speakers 51 and 52. In this case, since the angle of the display panel 30 is closer to the angle of the third-row seat 65 to 67 than the angle of the display panel 30 before rotation, the control unit 13 increases the gain of the sound signals to be output to the third-row seat speakers 51 and 52 to be greater than the gain before the display panel 30 was rotated. Specifically, the control unit 13 adjusts the gain of the sound signals based on the table in the auxiliary storage unit 14. That is, the gain values of the third-row seat speakers 51 and 52 corresponding to the angle of the display panel 30 before rotation are changed to the gain values of the third-row seat speakers 51 and 52 corresponding to the angle of the display panel 30 after rotation. Then, the control unit 13 generates a change signal including the gain values of the third-row seat speakers 51 and 52 corresponding to the angle of the display panel 30 after rotation, and outputs the change signal to the DSP 17.
[0063] Therefore, the DSP 17 causes the gain adjustment circuit 17a to generate a sound processing signal by increasing the gain of the sound signal based on the gain values of the third-row seat speakers 51 and 52 included in the changing signal, and outputs the sound processing signal to the D / A converter 18c. Thus, sound with a relatively large volume is output from the third-row seat speakers 51 and 52. Therefore, sound with an appropriate volume can be provided to the passengers 71 in the third-row seats 65 to 67.
[0064] On the other hand, when it is determined in S22 that the display panel 30 was not closed before rotation (no), that is, when the angle of the display panel 30 before rotation is the angle of the second row seats 63 and 64, the control unit 13 increases the gain of the sound signal to be output to the display panel speaker (S25). Here, the angle of the second row seats 63 and 64 is the angle of the display panel 30 facing the head of the passenger 72 of the second row seats 63 and 64 (e.g., 90° + 20°). In this case, the display panel 30 from... Figure 9A The second-row seats 63 and 64 shown are changed to be in the open position as shown. Figure 9B As shown, the third-row seats 65 to 67 are in the open position, and the angle of the display panel 30 is closer to the angle of the third-row seats 65 to 67 than the angle of the display panel 30 before rotation. Therefore, the control unit 13 increases the gain of the audio signal to be output to the display panel speaker to be greater than the gain before the display panel 30 was rotated. Then, the control unit 13 generates a change signal including the gain value of the display panel speaker corresponding to the angle after the display panel 30 is rotated, and outputs the change signal to the DSP 17.
[0065] Therefore, the DSP 17 causes the gain adjustment circuit 17a to generate a sound processing signal by increasing the gain of the sound signal based on the gain value of the display panel speaker included in the changing signal, and outputs the sound processing signal to the D / A converter 18a. Thus, the display panel speaker outputs a sound volume higher than the volume before the display panel rotates. Therefore, sound with an appropriate volume can be provided to passengers 71 in the third-row seats 65 to 67, which are relatively far from the display panel 30.
[0066] Subsequently, the control unit 13 reduces the gain of the sound signals to be output to the second-row seat speakers 41 and 42 in the vehicle (S26). For example, the control unit 13 minimizes the gain of the sound signals to be output to the second-row seat speakers 41 and 42. Then, the control unit 13 generates a variation signal that includes the minimum gain value of the second-row seat speakers 41 and 42, and outputs the variation signal to the DSP 17.
[0067] Therefore, DSP 17 causes gain adjustment circuit 17a to generate a sound processing signal by minimizing the gain of the sound signal based on the gain values of the second-row seat speakers 41 and 42 included in the changing signal, and outputs the sound processing signal to D / A converter 18b. Thus, almost no sound is output from the second-row seat speakers 41 and 42. Therefore, even when passenger 72 is seated in the second-row seats 63 and 64, passenger 72 is prevented from feeling uncomfortable by hearing sounds provided to passengers 71 in the third-row seats 65 to 67.
[0068] In addition, the control unit 13 increases the gain of the sound signals to be output to the third-row seat speakers 51 and 52 (S27). Then, the control unit 13 generates a change signal including the gain values of the third-row seat speakers 51 and 52 corresponding to the angle of the display panel 30 after rotation, and outputs the change signal to the DSP 17.
[0069] Therefore, DSP 17 generates a sound processing signal by increasing the gain of the sound signal based on the gain values of the third-row seat speakers 51 and 52 included in the changing signal, and outputs the sound processing signal to D / A converter 18c. Thus, sound with a relatively large volume is output from the third-row seat speakers 51 and 52. Therefore, sound with an appropriate volume can be provided to the passengers 71 in the third-row seats 65 to 67.
[0070] When it is determined in S21 that the angle of the display panel 30 after rotation is not the angle of the third-row seats 65 to 67 (no), that is, when the angle of the display panel 30 is the angle of the second-row seats 63 and 64, the control unit 13 determines whether the display panel 30 was rotated as before. Figure 6B The closing shown is (S31).
[0071] When it is determined in S31 that the display panel 30 is closed before rotation (Yes), the control unit 13 increases the gain of the sound signal to be output to the display panel speaker within a range smaller than that in S23 (S32). In this case, the display panel 30 rotates from... Figure 7A The off state shown changes to as follows Figure 7C The second-row seats 63 and 64 are shown in the open position, and the angle of the display panel 30 is closer to the angle of the third-row seats 65 to 67 than the angle before the display panel 30 was rotated. However, with Figure 7BThe angle of the display panel 30 shown exceeds the angle of the third-row seats 65 to 67 when they are open, and the display panel 30 is opened to the angle of the second-row seats 63 and 64. Therefore, the control unit 13 increases the gain of the audio signal to be output to the display panel speaker within a range smaller than that of S23. Then, the control unit 13 generates a change signal including the gain value of the display panel speaker corresponding to the angle after the display panel 30 is rotated, and outputs the change signal to the DSP 17.
[0072] Therefore, DSP 17 causes gain adjustment circuit 17a to generate a sound processing signal by increasing the gain of the sound signal based on the gain value of the display panel speaker included in the changing signal, and outputs the sound processing signal to D / A converter 18a. Thus, although the volume of the sound is less than the volume of the sound output as a result of S23, a relatively loud sound is output from the display panel speaker. Therefore, sound with an appropriate volume can be provided to passengers 72 in the second row of seats 63 and 64, which are relatively close to the display panel 30.
[0073] Subsequently, the control unit 13 increases the gain of the audio signals to be output to the second-row seat speakers 41 and 42 (S33). When the angle of the display panel 30 relative to the base 10 is close to the angle of the third-row seat 65 to 67, the control unit 13 increases the gain of the audio signals to be output to the second-row seat speakers 41 and 42. In this case, since the angle of the display panel 30 is closer to the angle of the third-row seat 65 to 67 than the angle of the display panel 30 before rotation, the control unit 13 increases the gain of the audio signals to be output to the second-row seat speakers 41 and 42 to be greater than the gain before the display panel 30 was rotated. Specifically, the control unit 13 adjusts the gain of the audio signals based on a table stored in the auxiliary storage unit 14. That is, the control unit 13 changes the gain value of the second-row seat speakers 41 and 42 corresponding to the angle of the display panel 30 before rotation to the gain value of the second-row seat speakers 41 and 42 corresponding to the angle of the display panel 30 after rotation. Then, the control unit 13 generates a change signal including the gain values of the second row seat speakers 41 and 42 corresponding to the angle of the display panel 30 after rotation, and outputs the change signal to the DSP 17.
[0074] Therefore, the DSP 17 causes the gain adjustment circuit 17a to generate a sound processing signal by increasing the gain of the sound signal based on the gain values of the second-row seat speakers 41 and 42 included in the changing signal, and outputs the sound processing signal to the D / A converter 18b. Thus, sound with a relatively high volume is output from the second-row seat speakers 41 and 42. Therefore, sound with an appropriate volume can be provided to the passengers 72 in the second-row seats 63 and 64.
[0075] On the other hand, when it is determined in S31 that the display panel 30 was not closed before rotation (No), that is, when the angle of the display panel 30 before rotation is the angle of the third-row seats 65 to 67, the control unit 13 reduces the gain of the sound signal to be output to the display panel speaker (S34). When the angle of the display panel 30 relative to the base 10 changes from the angle of the third-row seats 65 to 67 to an angle closer to the second-row seats 63 and 64, the control unit 13 reduces the gain of the sound signal to be output to the display panel speaker. In this case, the display panel 30 changes from the angle of the third-row seats 65 to 67 to an angle closer to the second-row seats 63 and 64. Figure 8A The third-row seats 65 to 67, as shown, are changed to be in the open position as follows. Figure 8B The second-row seats 63 and 64 are shown in the open position. That is, compared to the angle of the display panel 30 before rotation, the angle of the display panel 30 exceeds the angle of the third-row seats 65 to 67, and the display panel 30 is opened to the angle of the second-row seats 63 and 64. Therefore, the control unit 13 reduces the gain of the audio signal to be output to the display panel speaker to be less than the gain before the display panel 30 was rotated. Then, the control unit 13 generates a change signal including the gain value of the display panel speaker corresponding to the angle after the display panel 30 is rotated, and outputs the change signal to the DSP 17.
[0076] Therefore, the DSP 17 causes the gain adjustment circuit 17a to generate a sound processing signal by reducing the gain of the sound signal based on the gain value of the display panel speaker included in the changing signal, and outputs the sound processing signal to the D / A converter 18a. Thus, a sound with a relatively low volume is output from the display panel speaker. Therefore, a sound with an appropriate volume can be provided to the passengers 72 in the second row of seats 63 and 64, which are relatively close to the display panel 30.
[0077] Subsequently, the control unit 13 reduces the gain of the sound signals to be output to the third-row seat speakers 51 and 52 in the vehicle (S35). For example, the control unit 13 minimizes the gain of the sound to be output to the third-row seat speakers 51 and 52. Then, the control unit 13 generates a variation signal that includes the minimum gain value of the third-row seat speakers 51 and 52, and outputs the variation signal to the DSP 17.
[0078] Therefore, DSP 17 enables gain adjustment circuit 17a to generate a sound processing signal by minimizing the gain of the sound signal based on the gain values of the third-row seat speakers 51 and 52 included in the changing signal, and outputs the sound processing signal to D / A converter 18c. Thus, almost no sound is output from the third-row seat speakers 51 and 52. Therefore, even when passenger 71 is seated in the third-row seats 65 to 67, passenger 71 is prevented from feeling uncomfortable by hearing sounds provided to passengers 72 in the second-row seats 63 and 64.
[0079] Furthermore, the control unit 13 increases the gain of the audio signals to be output to the second-row seat speakers 41 and 42 to be greater than the gain before the display panel 30 rotates (S36). When the angle of the display panel 30 relative to the base 10 changes from the angle of the third-row seats 65 to 67 to an angle close to that of the second-row seats 63 and 64, the control unit 13 increases the gain of the audio signals to be output to the second-row seat speakers 41 and 42. In this case, compared to the angle of the display panel 30 before rotation as described above, the angle of the display panel 30 exceeds the angle of the third-row seats 65 to 67, and the display panel 30 opens to the angle of the second-row seats 63 and 64. Therefore, the control unit 13 increases the gain of the audio signals to be output to the second-row seat speakers 41 and 42 to be greater than the gain before the display panel 30 rotates. Then, the control unit 13 generates a change signal including the gain values of the second-row seat speakers 41 and 42 corresponding to the angle of the display panel 30 after rotation, and outputs the change signal to the DSP 17.
[0080] Therefore, DSP 17 generates a sound processing signal by increasing the gain of the sound signal based on the gain values of the second-row seat speakers 41 and 42 included in the changing signal, and outputs the sound processing signal to D / A converter 18b. Thus, sound with a relatively high volume is output from the second-row seat speakers 41 and 42. Therefore, sound with an appropriate volume can be provided to the passengers 72 in the second-row seats 63 and 64.
[0081] Although the sound setting change in S13 described above only involves changing the gain setting, the sound setting change is not limited to this. In this embodiment, the setting of at least one of the gain, phase, delay, and frequency characteristics of the sound signal can be changed. For example, in addition to changing the gain setting, the delay setting can also be changed. Therefore, a more suitable sound quality can be provided to the passengers 72 in the second row seats 63 and 64 or the passengers 71 in the third row seats 65 to 67. Alternatively, only the delay setting can be changed.
[0082] While examples of two-stage opening of the display panel 30 have been described, including stages where the display panel 30 is opened for the second-row seats 63 and 64 and stages where the display panel 30 is opened for the third-row seats 65 to 67, the invention is not limited thereto. For example, the standard angles of the display panels 30 for the second-row seats 63 and 64 and the third-row seats 65 to 67 can be changed in a manner corresponding to a person's build (primarily height) that is larger or smaller than that of a standard passenger. In this case, the angles of the display panels 30 can be adjusted by the user via the operation unit 12 from the standard angles of the display panels 30 for the second-row seats 63 and 64 and the third-row seats 65 to 67. That is, the display panel 30 can be opened in three or more stages. The sound settings of the sound signals to be output to each of the display panel speakers and vehicle speakers can then be changed according to the angle of the display panel 30 after rotation. Therefore, a more suitable sound quality can be provided to passengers 72 in the second-row seats 63 and 64 or passengers 71 in the third-row seats 65 to 67.
[0083] (Effects of the Example)
[0084] As described above, the vehicle-mounted audio display device 1 according to this embodiment changes the audio settings of the audio signal to be output to the display panel speaker (display unit 31 and actuator 32) based on the angle of the display panel 30 detected by the angle sensor 33. Therefore, since the audio output from the display panel speaker has a quality corresponding to the angle of the display panel 30, the influence of the angle of the display panel 30 can be reduced, and audio of appropriate quality can be provided to passengers 71 and 72.
[0085] The in-vehicle audio display device 1 adjusts the sound settings of the audio signals to be output to the vehicle speakers (second-row seat speakers 41 and 42 and third-row seat speakers 51 and 52) based on the angle of the display panel 30 detected by the angle sensor 33. Therefore, since the sound output from the vehicle speakers has quality corresponding to the angle of the display panel 30, the influence of the angle of the display panel 30 can be reduced, and passengers 71 and 72 can be provided with sound of appropriate quality.
[0086] The sound setting is a setting of at least one of the gain, phase, delay, and frequency characteristics of the sound signal output from the display panel speaker or vehicle speaker. Therefore, for example, when the sound setting is a gain setting, the sound output from the display panel speaker or vehicle speaker has a gain (volume) corresponding to the angle of the display panel 30. Thus, the effect of the angle of the display panel 30 can be reduced, and sound with an appropriate volume can be provided to passengers 71 and 72.
[0087] Furthermore, the at least one sound setting for outputting sound signals to the display panel speakers or vehicle speakers differs between the case where the angle of the display panel 30 is the angle of the second-row seats 63 and 64 and the case where the angle of the display panel 30 is the angle of the third-row seats 65 to 67. Here, the angle of the second-row seats 63 and 64 is the angle of the display panel 30 directly facing the heads of the passengers 72 in the second-row seats 63 and 64 (e.g., 90° + 20°). Additionally, the angle of the third-row seats 65 to 67 is the angle of the display panel 30 directly facing the heads of the passengers 71 in the third-row seats 65 to 67 (e.g., 90°). At least one sound setting is a setting for at least one of gain, phase, delay, and frequency characteristics. Therefore, for example, when the sound setting is a gain setting, an appropriate volume of sound can be provided to the passengers 72 in the second-row seats 63 and 64 and the passengers 71 in the third-row seats 65 to 67.
[0088] Specifically, when the angle of the display panel 30 relative to the base 10 detected by the angle sensor 33 is close to the angle of the third-row seats 65 to 67, the gain of the sound signal to be output to the display panel speaker increases. Therefore, since a relatively loud sound is output from the display panel speaker, an appropriate volume of sound can be provided to the passengers 71 in the third-row seats 65 to 67, which are relatively far from the display panel 30.
[0089] When the angle of the display panel 30 changes from the angle of the third-row seats 65 to 67 to an angle closer to the second-row seats 63 and 64, the gain of the sound signal output to the display panel speaker decreases. Therefore, although the volume is lower than when the angle of the display panel 30 is the angle at which the display panel 30 is directly facing the head of the passenger 71 in the third-row seats 65 to 67 (e.g., 90°), an appropriate volume of sound can be provided to the passenger 72 in the second-row seats 63 and 64, which are relatively close to the display panel 30, because the sound output from the display panel speaker has a relatively large volume.
[0090] When the angle of the display panel 30 approaches the angle of the third-row seats 65 to 67, the gain of the sound signal to be output to the third-row seat speakers 51 and 52 in the vehicle speakers increases. Therefore, since the sound with a relatively large volume is output from the third-row seat speakers 51 and 52, sound with an appropriate volume can be provided to the passengers 71 in the third-row seats 65 to 67.
[0091] When the angle of the display panel 30 changes from the angle of the third-row seats 65 to 67 to an angle close to that of the second-row seats 63 and 64, the gain of the sound signal output to the second-row seat speakers 41 and 42 increases. Therefore, since the sound with a relatively large volume is output from the second-row seat speakers 41 and 42, sound with an appropriate volume can be provided to the passengers 72 of the second-row seats 63 and 64.
[0092] <Modification Plan>
[0093] In the above embodiments, a support shaft for opening and closing the display panel 30 has been described as being located at the front of the vehicle 60 in the base 10. That is, a display device has been described in which the display surface 31a of the display unit 31 faces the roof of the vehicle 60 when the display panel 30 is closed, and faces the rear passengers of the vehicle 60 when the display panel 30 is open. In this display device, when the display panel 30 is opened, the angle of the display panel 30 first changes to the angle of the third-row seats 65 to 67 (e.g., 90°), and then to the angle of the second-row seats 63 and 64 (e.g., 90° + 20°). However, the configuration and operation of the display device are not limited to this.
[0094] For example, the following describes a case where the support shaft for opening and closing the display panel 30 is located at the rear of the vehicle 60 in the base 10. That is, the display device can be a device where the display surface 31a of the display unit 31 faces the floor of the vehicle 60 when the display panel 30 is closed, and faces the rear passengers of the vehicle 60 when the display panel 30 is open. When the display panel 30 is open, the angle of the display panel 30 can first change to the angle of the second-row seats 63 and 64 (e.g., 90°-20°), and then to the angle of the third-row seats 65 to 67 (e.g., 90°). In this case of a display device, the sound settings for the sound signals output to each of the display panel speakers and the vehicle speakers can be changed according to the angle of the display panel 30 detected by the angle sensor 33.
[0095] For example, the appropriate values for the sound settings and the appropriate values for the gain stored in the auxiliary storage unit 14 can be set as follows: That is, when the angle of the display panel 30 relative to the base 10 is close to the angle of the second-row seats 63 and 64, the gain of the sound signal to be output to the display panel speaker can be increased. Furthermore, when the angle of the display panel 30 changes from the angle of the second-row seats 63 and 64 to an angle close to the angle of the third-row seats 65 to 67, the gain of the sound signal to be output to the display panel speaker can be increased. When the angle of the display panel 30 is close to the angle of the second-row seats 63 and 64, the gain value of the sound signal to be output to the second-row seat speakers 41 and 42 can be increased. Furthermore, when the angle of the display panel 30 changes from the angle of the second-row seats 63 and 64 to an angle close to the angle of the third-row seats 65 to 67, the gain value of the sound signal to be output to the third-row seat speakers 51 and 52 can be increased. Here, the angle of the second-row seats 63 and 64 is the angle of the display panel 30 facing the head of the passenger 72 of the second-row seats 63 and 64 (e.g., 90°-20°). In addition, the angle of the third row seats 65 to 67 is the angle at which the display panel 30 faces the head of the passenger 71 in the third row seats 65 to 67 (e.g., 90°).
[0096] Then, the control unit 13 can use the appropriate gain value stored in the auxiliary storage unit 14 to change the gain of the sound signal to be output to each of the display panel speaker and the vehicle speaker according to the angle of the display panel 30 relative to the base 10 detected by the angle sensor 33.
[0097] Specifically, when the angle of the display panel 30 approaches the angle of the second-row seats 63 and 64, the control unit 13 can increase the gain of the sound signal to be output to the display panel speaker. Therefore, a relatively loud sound is output from the display panel speaker. Thus, a sound with an appropriate volume can be provided to passengers 72 in the second-row seats 63 and 64 who are relatively close to the display panel 30. Furthermore, when the angle of the display panel 30 changes from the angle of the second-row seats 63 and 64 to an angle approaching the third-row seats 65 to 67, the control unit 13 can increase the gain of the sound signal to be output to the display panel speaker. Therefore, the volume of the sound output from the display panel speaker is louder than when the angle of the display panel 30 is the same as the angle of the second-row seats 63 and 64. Thus, a sound with an appropriate volume can be provided to passengers 71 in the third-row seats 65 to 67 who are relatively far from the display panel 30.
[0098] Furthermore, when the angle of the display panel 30 approaches the angle of the second-row seats 63 and 64, the control unit 13 can increase the gain of the sound signal to be output to the second-row seat speakers 41 and 42. Therefore, a relatively loud sound is output from the second-row seat speakers 41 and 42. Thus, sound with an appropriate volume can be provided to the passengers 72 in the second-row seats 63 and 64.
[0099] Furthermore, when the angle of the display panel 30 changes from the angle of the second-row seats 63 and 64 to an angle close to that of the third-row seats 65 to 67, the control unit 13 can increase the gain of the sound signal to be output to the third-row seat speakers 51 and 52. Therefore, a relatively loud sound is output from the third-row seat speakers 51 and 52. Thus, sound with an appropriate volume can be provided to the passengers 71 in the third-row seats 65 to 67.
[0100] In the above embodiments, the case where the auxiliary storage unit 14 stores a table containing appropriate values for the sound settings of the display panel 30 for different angle variations has been described. However, the configuration of the table stored in the auxiliary storage unit 14 is not limited to this. For example, the auxiliary storage unit 14 may store a table containing appropriate values for the sound settings of the display panel 30 for a predetermined angle range. Table 1 below shows an example configuration of the table, in which appropriate values for the gain of the display panel 30 relative to the base 10 for each of the display panel speaker and the vehicle speaker are created. Here, it is assumed that the support shaft for opening and closing the display panel 30 is located at the front of the vehicle 60 in the base 10, and the display surface 31a of the display unit 31 faces the roof of the vehicle 60 when the display panel 30 is closed. However, when the support shaft for opening and closing the display panel 30 is located at the rear of the vehicle 60 in the base 10, the angle range is different, but the same table as Table 1 can be used for sound settings. In Table 1, within a predetermined angle range, for example, it is assumed that the angle range from 80° to 100° is the angle range for passengers 71 in the third-row seats 65 to 67. Furthermore, it is assumed that the angle range from 100° to 130° is the angle range for passengers 72 in the second-row seats 63 and 64. Additionally, it is assumed that the angle range from 130° to 150° is the angle range for child passengers 72 in the second-row seats 63 and 64.
[0101] Table 1
[0102]
[0103] The display panel 30 is rotated from a closed state relative to the base 10 to a user-specified posture by an operation related to the posture of the display panel 30 via the operation unit 12. In this case, after the control unit 13 detects that the rotation of the display panel 30 has stopped, the control unit 13 receives a detection signal from the angle sensor 33 and detects the angle of the display panel 30 relative to the base 10. Subsequently, the control unit 13 can use the table shown in Table 1 to change the gain value to an appropriate gain value corresponding to the angle range including the detected angle of the display panel 30. Then, the control unit 13 can generate a change signal including an appropriate gain value corresponding to the angle range including the detected angle of the display panel 30, and output the change signal to the DSP 17.
[0104] For example, when the detected angle of the display panel 30 is 85°, the control unit 13 can change the gain value to an appropriate gain value corresponding to the angle range of 80° to 100° shown in Table 1. That is, the control unit 13 can change the gain value of the display panel speaker to "high volume". Therefore, a relatively loud sound is output from the display panel speaker, thus providing a sound with an appropriate volume to the passengers 71 in the third-row seats 65 to 67, which are relatively far from the display panel 30. In addition, the control unit 13 can change the gain value of the third-row seat speakers 51 and 52 to "high volume". Therefore, a relatively loud sound is output from the third-row seat speakers 51 and 52, thus providing a sound with an appropriate volume to the passengers 71 in the third-row seats 65 to 67. In addition, the control unit 13 can change the gain value of the second-row seat speakers 41 and 42 to "low volume". Therefore, a relatively low volume sound is output from the second-row seat speakers 41 and 42. Therefore, even when passenger 72 is seated in the second row of seats 63 and 64, it can prevent passenger 72 from feeling uncomfortable from hearing the sounds provided for passengers 71 in the third row of seats 65 to 67.
[0105] Table 2 below shows an example of a table configuration where appropriate values for the delay amount and appropriate values for the frequency characteristics relative to a predetermined angular range of the display panel speaker are made for the display panel speaker.
[0106] Table 2
[0107]
[0108] As described above, after the control unit 13 detects that the rotation of the display panel 30 has stopped, the control unit 13 receives a detection signal from the angle sensor 33 and detects the angle of the display panel 30 relative to the base 10. Subsequently, the control unit 13 can use the table indicated by Table 2 to change the values of the delay amount and the frequency characteristic to appropriate values of the delay amount and the frequency characteristic corresponding to an angle range including the detected angle of the display panel 30. Then, the control unit 13 can generate a change signal including appropriate values of the delay amount and the frequency characteristic corresponding to an angle range including the detected angle of the display panel 30, and output this change signal to the DSP 17.
[0109] For example, when the detected angle of the display panel 30 is 85°, the delay amount can be changed to an appropriate value corresponding to the angle range of 80° to 100° shown in Table 2, i.e., "-1". Therefore, the sound output from the display panel speaker arrives at the passengers 71 in the third rows of seats 65 to 67 simultaneously with the sound output from the third-row seat speakers 51 and 52, or arrives at the passengers 71 slightly earlier than the sound output from the third-row seat speakers 51 and 52. Thus, by positioning the sound image towards the display panel 30 through the sound effect in front of the sound output from the display panel speaker, appropriate sound can be provided to the passengers 71 in the third rows of seats 65 to 67. Furthermore, the delay amount can be changed to an appropriate value of the frequency response corresponding to the angle range of 80° to 100°, i.e., the range of "300Hz to 3kHz" can be changed to +3dB. Therefore, in the sound output from the display panel speakers, the frequency band where sound tends to attenuate, namely the 300Hz to 3kHz band, becomes slightly stronger, thus ensuring that the sound output from the display panel speakers clearly reaches the passengers 71 in the third row seats 65 to 67. Therefore, appropriate sound can be provided to the passengers 71 in the third row seats 65 to 67.
[0110] In Table 2, the appropriate value for the delay amount corresponding to the angular range of 100° to 130° and 130° to 150° for passengers 72 in the second row seats 63 and 64 is "±0ms". However, considering the aforementioned sound effects, appropriate values for the delay amount corresponding to these angular ranges can also be set for passengers 72 in the second row seats 63 and 64. The appropriate value for the frequency response corresponding to the angular ranges of 100° to 130° and 130° to 150° is "uncorrected". However, considering the clarity of the sound, appropriate values for the frequency response corresponding to these angular ranges can also be set for passengers 72 in the second row seats 63 and 64.
[0111] Table 2 does not specify appropriate phase values for each predetermined angle range. However, appropriate phase values can be set for each predetermined angle range in tables such as Table 2, so that the sound output from the display panel speaker reaches passengers 72 in the second row seats 63 and 64 and passengers 71 in the third row seats 65 to 67 with ideal pulse characteristics.
[0112] Although the above embodiments have described a scenario where the in-vehicle sound display device 1 includes both a display panel speaker and a vehicle speaker, the speaker configuration of the in-vehicle sound display device 1 is not limited thereto. For example, the in-vehicle sound display device 1 may include only a display panel speaker. In this case, the auxiliary storage unit 14 may simply store a table containing appropriate values for the sound settings of the display panel speaker at the angle of the display panel 30. Furthermore, the in-vehicle sound display device 1 may include only vehicle speakers. In this case, the auxiliary storage unit 14 may simply store a table containing appropriate values for the sound settings of the vehicle speakers (second-row seat speakers 41 and 42 and third-row seat speakers 51 and 52) at the angle of the display panel 30.
[0113] Although the rotation of the display panel 30 in the yz plane has been described in the above embodiments, the direction of rotation of the display panel 30 is not limited to this. For example, the base 10 may include other rotation mechanisms besides the rotation mechanism 20, so that the display panel 30 can also rotate in the xy plane in addition to the yz plane. In this case, in addition to the angles in the yz plane, the auxiliary storage unit 14 may also store a table in which appropriate values for the sound settings of the angle of the display panel 30 for each predetermined angle of the display panel 30 are created for the angles in the xy plane.
[0114] Although the above embodiments have described the case where the display panel 30 is driven and rotated by the rotation mechanism 20, the drive unit for rotating the display panel 30 is not limited thereto. For example, the display panel 30 can be rotated manually. Even in this case, the sound setting of the sound signal to be output to the display panel speaker can be changed according to the angle of the display panel 30 detected by the angle sensor 33 using a table stored in the auxiliary storage unit 14, and the table can be made up with an appropriate value for the sound setting of the angle of the display panel 30.
[0115] Although the display panel speaker in the above embodiment includes a display unit 31 and an actuator 32, the configuration of the display panel speaker is not limited thereto. For example, instead of the display unit 31 and the actuator 32, a speaker such as a vehicle speaker may be provided on the display surface 31a of the display panel 30. Instead of the display surface 31a, a speaker such as a vehicle speaker may be provided on the surface of the display panel 30 opposite to the display surface 31a. Alternatively, a speaker such as a vehicle speaker may be provided on the side surface of the display panel 30.
[0116] Although the above embodiments have described a case where the in-vehicle audio display device 1 includes a ceiling-mounted folding display device installed in the ceiling portion of the vehicle cabin, the form of the display device included in the in-vehicle audio display device 1 is not limited thereto. For example, the in-vehicle audio display device 1 may include a headrest-attached retractable display device installed at the headrest of the first row seats 61 and 62 or the second row seats 63 and 64.
Claims
1. A voice control device, comprising: The display panel is supported by a base located in the vehicle in such a way that the angle of the display panel relative to the base is variable; An angle detector is configured to detect the angle; The controller is configured to change the sound settings in the vehicle's cabin based on the angle. as well as The first speaker is located on the display panel, wherein The controller adjusts the sound settings of the sound signal to be output to the first speaker based on the angle. The sound settings are settings for at least one of the gain, phase, delay, or frequency characteristics of the sound signal to be output to the first speaker, and The controller performs control such that at least one of the gain, phase, delay, and frequency characteristics of the sound signal to be output to the first speaker is different between the case where the angle of the display panel relative to the base detected by the angle detector is the angle of the display panel facing the head of a passenger in the second row of seats of the vehicle and the case where the angle of the display panel relative to the base detected by the angle detector is the angle of the display panel facing the head of a passenger in the third row of seats of the vehicle.
2. The sound control device according to claim 1, further comprising: A second speaker, located in the vehicle and different from the first speaker, wherein... The controller changes the sound settings of the sound signal to be output to the second speaker based on the angle of the display panel detected by the angle detector.
3. The sound control device according to claim 2, wherein... The sound settings for the sound signal to be output to the second speaker are settings for at least one of the gain, phase, delay, or frequency characteristics of the sound signal to be output to the second speaker.
4. The sound control device according to claim 3, wherein The controller performs control such that at least one of the gain, phase, delay, and frequency characteristics of the sound signal to be output to the second speaker is different between the angle of the display panel relative to the base detected by the angle detector being the angle of the display panel facing the head of a passenger in the second row of the vehicle and the angle of the display panel relative to the base detected by the angle detector being the angle of the display panel facing the head of a passenger in the third row of the vehicle.
5. The sound control device according to any one of claims 2 to 4, wherein When the angle detector detects that the angle of the display panel relative to the base is close to the angle at which the display panel faces the head of a passenger in the third row of seats of the vehicle, the controller increases the gain of the sound signal to be output to the first speaker.
6. The sound control device according to claim 5, wherein... When the angle of the display panel relative to the base detected by the angle detector changes from the angle of the display panel facing the head of the passenger in the third row of seats to the angle of the display panel facing the head of the passenger in the second row of seats of the vehicle, the controller reduces the gain of the sound signal to be output to the first speaker.
7. The sound control device according to any one of claims 2 to 4, wherein The second speaker is located near the third row of seats in the vehicle, and When the angle detector detects that the angle of the display panel relative to the base is close to the angle at which the display panel faces the head of the passenger in the third row of seats, the controller increases the gain of the sound signal to be output to the second speaker.
8. The sound control device according to any one of claims 2 to 4, wherein The second speaker is located near the second row of seats in the vehicle, and When the angle detector detects that the angle of the display panel relative to the base changes from the angle of the display panel facing the head of the passenger in the third row of the vehicle to the angle of the display panel facing the head of the passenger in the second row of the vehicle, the controller increases the gain of the sound signal to be output to the second speaker.
9. The sound control device according to claim 5, wherein The second speaker is located near the second row of seats in the vehicle, and When the angle detector detects that the angle of the display panel relative to the base changes from the angle of the display panel facing the head of the passenger in the third row of the vehicle to the angle of the display panel facing the head of the passenger in the second row of the vehicle, the controller increases the gain of the sound signal to be output to the second speaker.
10. A sound control method for changing sound settings in the cabin of a vehicle, the vehicle comprising at least a first row of seats, a second row of seats, and a third row of seats, the sound control method comprising: The angle of the display panel relative to a base disposed in the vehicle is detected, and the display panel is supported by the base; The controller adjusts the sound settings of the output sound signal based on the detected angle of the display panel. The controller changes the sound settings of the sound signal to be output to the first speaker located at the display panel according to the angle. The sound settings are settings for at least one of the gain, phase, delay, or frequency characteristics of the sound signal to be output to the first speaker. as well as The controller performs control such that at least one of the gain, phase, delay, and frequency characteristics of the sound signal to be output to the first speaker is different between the detected angle of the display panel relative to the base being the angle at which the display panel faces the head of a passenger in the second row of the vehicle and the detected angle of the display panel relative to the base being the angle at which the display panel faces the head of a passenger in the third row of the vehicle.