JPH11215580A - Panel type speaker device - Google Patents

Abstract

(57) [Problem] To provide a novel speaker device by using a lid of a housing device as a diaphragm. SOLUTION: The lid of the housing device 2 is configured as a diaphragm 10 whose outer peripheral portion 10c is supported in a substantially unconstrained state,
At least one or more driver units 11 attached to the diaphragm 10 to generate a partial bending operation based on a reproduction input signal and emit a reproduction output.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker device suitable for use in an electronic organizer, a handy personal computer or various portable information terminal devices, and more particularly, to a speaker device which is rotatably combined with a device body. The present invention relates to a panel-type speaker device that also serves as a covered body.

[0002]

2. Description of the Related Art Devices incorporating a speaker device are employed not only in audio devices but also in many technical fields such as computer devices and their terminal devices. Many devices constitute a housing device by a housing and a lid rotatably combined with the housing via a hinge mechanism,
When not used, the housing is closed by the lid.

For example, an electronic organizer, a handy personal computer, various portable information terminal devices, and the like generally have a display unit, a control unit, a communication unit, and the like in the main body of the device, and a display unit in a portable or unused state. In order to protect the device and the like, a lid that is rotatable with respect to the device body is provided. The use of electronic organizers and the like has been expanded in various ways due to the enhancement of software, and not only processing of data information but also processing of audio information as well as image information has become extremely important. For this reason, an electronic organizer device or the like reproduces and outputs a reproduction input signal such as audio information supplied from a computer device or the like, informs the contents of stored data or a warning, or an audio guide from a loaded disk. Speaker device that emits a sound.

As a speaker device, a cone type dynamic speaker, a horn type dynamic speaker and the like are generally used. For example, a cone-type dynamic speaker includes a diaphragm formed in a conical shape, a driver unit for driving the diaphragm, a frame supporting an outer peripheral edge of the diaphragm, and a cabinet or the like accommodating these members. It is composed of members. The driver unit includes members such as a voice coil, a pole, a plate, a magnet, a damper, and a center cap.

The diaphragm has a basic shape of the above-mentioned conical shape made of a lightweight material having a large internal loss, and a driver unit is disposed at the center thereof. Generally, the thickness of the diaphragm is gradually reduced from the inner peripheral portion to the outer peripheral portion, and the outer peripheral edge portion is supported by the frame via arrow paper over the entire periphery. The frame is a member that couples the diaphragm and the driver and also has a function of protecting the diaphragm. A notch window is generally formed in the frame so that the vibration plate does not exert a reaction due to the vibration operation. The arrow paper acts on the outer peripheral edge of the diaphragm and prevents the diaphragm from contacting the mounting portion of the cabinet when the diaphragm vibrates.

On the other hand, a horn type dynamic speaker is
The vibrating sound of the diaphragm driven by the voice coil is enlarged and emitted by the horn, and the basic configuration other than having the horn is equivalent to the above-mentioned cone type dynamic speaker. That is, even in the horn type dynamic speaker, a magnet and a pole integrally attached to the tip of the magnet,
A driver unit is constituted by a yoke surrounding the pole and a plate having an opening facing the pole and assembled to the yoke. The driver unit vibrates the diaphragm.

The diaphragm is formed of a light metal such as aluminum, a synthetic resin, or the like to have a spherical shape. The outer peripheral edge of the diaphragm is coupled to the plate so as to face the pole by closing the opening.
The diaphragm has a large mechanical rigidity because it is smaller than the diaphragm of the above-mentioned cone-type dynamic speaker and the resonance of the vibration system is good in a substantially central region of the reproduction band. Therefore,
The diaphragm is coupled to the plate without a damper, and its peripheral portion is vibrated by a driver unit. In other words, also in the horn type dynamic speaker, the diaphragm is fixed at the outer peripheral edge and supported like the diaphragm of the cone type dynamic speaker.

By the way, many attempts have been made to realize a so-called panel type speaker device which is thin and does not require a box or the like and can be installed at any position. However, none of these attempts has led to the realization of an ideal panel-type speaker device due to technical limitations, acoustic performance limitations, and the like. Most of these attempts are based on the above-mentioned cone type dynamic speaker and horn type dynamic speaker.

As a thin loudspeaker device, for example, a capacitor-type loudspeaker in which a panel-shaped diaphragm is opposed to a fixed pole at a small interval is known. In general, a capacitor-type speaker has a diaphragm in which a metal thin film is formed on a diaphragm and several hundreds of meters are disposed between the diaphragm and a fixed pole.
A DC bias voltage of volts is applied. When a reproduction signal is input to the fixed pole, the diaphragm vibrates due to a change in magnetic attraction between the fixed pole and the reproduction signal. Further, as a capacitor-type speaker, a push-pull-type speaker adapted for all bands by providing fixed poles with a diaphragm interposed therebetween is also provided.

[0010] As described above, since the capacitor type speaker needs to apply a voltage of several hundred volts to the sound emitting portion, it is difficult to freely install it in any place, and in addition to the temperature and humidity conditions. There is a problem that stability due to the change is low. In addition, the capacitor type speaker has a problem in that the maximum undistorted output sound pressure level obtained with respect to the input voltage is smaller than that of the dynamic speaker device described above, because the input voltage is defined as the DC bias voltage. Further, the capacitor type speaker has various problems such as an increase in the size of a diaphragm in order to secure stable frequency characteristics in all bands.

[0011]

An electronic organizer or the like generally has a large size capable of reproducing and outputting a reproduction input signal such as audio information with sufficient volume and good sound quality due to conditions such as internal space and cost. It is difficult to incorporate the above speaker device. Therefore, a conventional electronic organizer or the like has a built-in small loudspeaker device having a function of simply reproducing and outputting a reproduction input signal such as audio information and the like, and it is not possible to secure a sufficient volume. There were problems such as missing or not being able to hear clearly.

[0012] Some electronic organizers and the like have the function of, for example, audio equipment. However, since a built-in speaker apparatus is not expected to have excellent acoustic characteristics, it is necessary to exhibit its function sufficiently. Could not. An electronic organizer or the like also has a function of connecting a large external speaker device, for example, to complement the above-mentioned built-in speaker device. However, it is not an exaggeration to say that such an external speaker device is hardly used because it requires an optional member for connection and the connection operation is troublesome. As described above, in an electronic organizer or the like, an inexpensive speaker device that is small and thin, does not require a large installation space, and can reproduce a reproduction input signal such as audio information with a sufficient volume and good sound quality is required. It had been.

In a speaker device, it is generally considered that when a reproduction input signal is supplied, a driver unit causes a diaphragm to operate like a piston to reproduce an output. Therefore, in a panel type speaker device, an attempt has been made to produce a high-precision planar diaphragm that operates in the same manner as the diaphragm of the above-described conventional speaker device by using an electromagnetic drive method or an electrostatic drive method for the diaphragm. For example, in an electrostatic drive type diaphragm, an outer peripheral portion is supported with a predetermined tension, and when a driving force is applied from a driver unit, waves are continuously generated concentrically from the driving position. . Such diaphragms have to solve various problems caused by large area piston operation which, by operating as a large single phase diaphragm, cause sound concentration and uncontrollable vibration.

On the other hand, as a panel type speaker device, a speaker device having a novel panel structure in which a diaphragm is driven by a driver unit based on the bending wave theory has been proposed. In this novel panel type speaker device, the diaphragm is formed by a rigid panel structure having relatively large mechanical rigidity, and when a driving force is applied from a driver unit, a complex vibration mode is generated on the entire surface of the diaphragm. Is done. The vibration mode is a flat panel (diaphragm)
Of the most complex and densely distributed waveforms uniformly distributed over the range of operating frequencies. The novel panel type loudspeaker device is characterized by the analysis of the physical characteristics of bending waves, the speed versus frequency characteristics of the waves, and the driving point impedance characteristics for a finite size diaphragm.

The novel panel-type speaker device uses a diaphragm having a flexural rigidity whose parameters are optimized according to the intended use, and can operate up to a frequency band lower than the coincidence frequency. In general, a new panel-type speaker device is driven by a driver unit near a center point of the diaphragm in order to secure a bending mode with the maximum density from the diaphragm. The diaphragm has been proven by mathematical modeling tools to a specific aspect ratio that provides uniform modal density by finite element analysis. In addition, in the novel panel type speaker device, the position where the driving force is supplied to the diaphragm that achieves the best mode uniformity is determined by Fourier-type analysis. Then, in the new panel type speaker device, although some loss occurs in a high frequency band due to the expansion of Fourier type analysis, it is also possible to drive a diaphragm having a larger area. The diaphragm is represented by a bending stiffness equation that approximates the more general static beam bending equation by taking the zero frequency limit of the wave function.

The new panel-type speaker device has factors that determine the bending operation of the diaphragm, namely, surface density, bending rigidity,
It is manufactured by optimally setting parameters of geometric dimensions (outer dimensions), surface area, positions of driving points, parameters of a drive unit, a shear module of a core, internal loss, or a method of supporting a diaphragm. In a general speaker device, since a rear sound called a dipole has a phase opposite to that of a front sound, a large baffle plate or an enclosure for preventing cancellation of acoustic energy in a middle frequency band to a low frequency band is required. I do. On the other hand, in the new panel-type speaker device, since the radiation of the rear sound called bipolar is added to the front sound,
Efficiency is improved and baffle plates and enclosures are not required.

The novel panel-type speaker device enables full-range output reproduction by a single diaphragm driven by a single-element transducer. The new panel-type speaker device can obtain a flat frequency characteristic equivalent to that of the conventional speaker device by selecting an appropriate material for the diaphragm and employing a configuration suitable for the transducer.

The new panel type speaker device not only achieves compatibility with existing amplifiers by making the sensitivity and electric load equivalent to those of the conventional speaker device, but also provides an electrodynamic driver unit and a piezoelectric type. The driver unit can be applied, and a radiation pattern of a very wide sound field as well as a bidirectional radiation pattern can be obtained. The novel panel type speaker device has a conversion efficiency of mechanical energy to acoustic energy of almost 100% and possesses characteristics of omnidirectional radiation independent of frequency, that is, large uniformity of sound power at each frequency. ing. The novel panel-type speaker device has such a feature that sound power attenuation due to distance conditions is small, and has various other features due to its novel configuration.

The present invention is based on a novel panel type loudspeaker device based on the bending wave theory in which the above-mentioned driver unit causes the diaphragm to generate a bending operation based on a reproduced input signal to drive and output and reproduce the signal. A new panel-type speaker device capable of reproducing a reproduction input signal such as audio information with sufficient volume and good sound quality equal to or higher than that of a conventional external type speaker device by configuring the lid of the body device as a diaphragm It has been proposed for the purpose of providing.

[0020]

According to the present invention, there is provided a panel-type speaker device which is formed in a rigid panel shape and whose outer peripheral portion is supported in a substantially unrestricted state. A lid attached to a main surface of the lid and at least one or more driver units constituting an excitation source for causing a partial bending operation of the lid based on a reproduction input signal; You.

In the panel-type speaker device, the housing device is composed of an information terminal device having a display unit, a control unit, a communication unit, and the like. Is configured to protect the display and the like, and to reproduce and output audio and the like based on the reproduction input signal in the open state.

According to the panel-type speaker device of the present invention configured as described above, the display portion provided on the device main body side is protected by the lid when not in use or the like, and the device is also used in use or the like. A vibrating body having a large vibrating surface that emits a reproduced output by being driven by a driver unit based on a supplied reproduction input signal to a lid that has been rotated with respect to the main body. Therefore, the panel-type speaker device is applied to, for example, a portable information terminal device or the like, and has an acoustic characteristic that enables a reproduction input signal such as audio information to be reproduced with a sufficient volume and good sound quality in a limited space. It enables the construction of an excellent computer system.

[0023]

Embodiments of the present invention will be described below in detail with reference to the drawings. A panel type speaker device 1 shown in FIG. 1 as an embodiment of the present invention constitutes, for example, a built-in speaker device of an electronic organizer device 2 and is housed inside a lid structure 4 rotatably combined with a device main body 3. Is done. As shown in FIG. 1, the electronic organizer 2 has a liquid crystal display 5 and an operation unit 6 arranged on the main surface of a thin box-shaped device main body 3 and is provided on one side surface of the device main body 3. A pair of hinge mechanisms 7a and 7b (details of which are omitted in the following description will be first described in this way, but in the following description, the hinge mechanisms 7a and 7b will be described in the following description unless otherwise specifically described). 7, the lid structure 4 is rotatably supported.

As shown in FIG. 2, the cover assembly 4 has a cover member 8 formed in a shallow dish shape, and a middle plate 9 and a middle plate 9 combined via a not-shown mounting portion formed integrally with the cover member 8. An inner lid member 10 supported by the middle plate 9 as described later and constituting a diaphragm of the panel type speaker device 1
(Hereinafter, referred to as a diaphragm). The lid structure 4 is
When the electronic organizer 2 is not used, the main body 3 is closed to protect the liquid crystal display 5 and the operation unit 6. The cover assembly 4 is provided with a lock mechanism (not shown) at a position facing the hinge mechanism 7 so that the apparatus main body 3 is kept closed. In addition, about the lid structure 4,
The present invention is not limited to the above-described configuration. For example, the intermediate plate 9 that supports the diaphragm 10 is omitted, and the diaphragm 10 is directly supported by the cover member 8 to further reduce the thickness.

The panel type speaker device 1 includes the above-described diaphragm 10 and driver units 11a, 11b, 11c attached to the diaphragm 10. The panel type speaker device 1 has a wiring connected to a control unit or the like on the device body 3 side for supplying a reproduction input signal to each driver unit 11. Is appropriately derived.

The diaphragm 10 is formed in a panel shape from, for example, a synthetic resin material, and the entire surface thereof is configured as a sound emitting surface 10a, as will be described later. As a driven surface 10b. As the synthetic resin material of the diaphragm 10, for example, an acrylic resin, a polycarbonate resin, a polyester resin, a cellulose resin such as triacetyl cellulose, diacetyl cellulose, a styrene resin, or the like is used. The diaphragm 10 is
In addition to the synthetic resin material, the driven surface 10b may be formed of a thin metal plate subjected to a non-conductive treatment.

The diaphragm 10 has a sufficient rigidity having a thickness of, for example, about 2 mm, unlike the diaphragm of a conventional general speaker device. The outer dimensions of the diaphragm 10 are slightly smaller than the opening dimensions of the cover member 8.
The outer peripheral portion 10c is unconstrained by the cover member 8 or the like and is supported by the middle plate 9. The diaphragm 10 is driven by causing a partial bending operation to be generated by the driver unit 11 based on a reproduction input signal, as will be described in detail later, and emits a reproduction output. As described above, since the outer peripheral portion 10c of the diaphragm 10 is supported in an unconstrained state, the outer peripheral portion 10c is configured to freely vibrate.

As shown in FIG. 1, the driver units 11 are fixed to the driven surface 10b of the diaphragm 10 at equal intervals in the longitudinal direction. As each driver unit 11, a voice coil type driver unit provided in a conventional speaker device or a piezoelectric type driver unit using a piezoelectric element is used. Although the details of the piezoelectric driver unit are omitted, the piezoelectric driver unit is constituted by a thin piezoelectric element, so that the whole is effective because the whole can be made thin and small. The panel-type speaker device 1 includes three dry units 11.
It may be configured to include one or many.

FIG. 2 shows the voice coil type driver unit 11. The driver unit 11 includes a voice coil 12 and a magnetic circuit 13 for driving the voice coil 12 based on a reproduction input signal. The voice coil 12 includes a bobbin 14 and a coil portion 15 formed by winding a bobbin around the bobbin 14. The magnetic circuit 13 is combined with the center pole 16, a ring-shaped magnet 17 that is assembled by penetrating the center pole 16 through the center hole, and the magnet 17 with the center pole 16 facing the center hole. It is composed of members such as a ring-shaped plate 18 and a damper 19. The driver unit 11 includes a voice coil 12
The coil part 15 with the center pole 16 and the plate 18
And is supported by the damper 19 so as to be positioned in the magnetic space defined by The damper 19
The bobbin 14 of the voice coil 12 and the plate 18 are connected.

In the driver unit 11 configured as described above, as shown in FIG. 2, the tip of the bobbin 14 is fixedly joined to the driven surface 10b of the diaphragm 10, and the center pole 16 is fixed to the flange portion. 16a to set screw 16
By being screwed to the middle plate 9 via the “b”, it is housed inside the lid structure 4. The driver unit 11
For example, a ring-shaped mounting plate may be fitted to the tip of the bobbin 14 and mounted to the diaphragm 10 via the mounting plate.

In the panel-type speaker device 1 configured as described above, when a reproduction input signal (audio current) is supplied to the driver unit 11 from a reproduction input signal input circuit (not shown), the diaphragm 10 vibrates. Being sound emitting surface 10
The sound of the reproduction output is output from a. Driver unit 1
1, when a voice current is supplied to the voice coil 12 located in the magnetic space of the magnetic circuit 13, the voice coil 12 vibrates in a direction orthogonal to the diaphragm 10.
In the panel-type speaker device 1, a partial bending operation is generated in the diaphragm 10 with the joint portion of the voice coil 12 with the bobbin 14 as a driving point, and the reproduced output is emitted.

FIG. 3 shows the panel type speaker device 1 described above.
FIG. 4 is a diagram showing an operation state of a diaphragm 10 driven by a driver unit 11 for FIG. FIG. 2A is a diagram showing an operation state of the diaphragm 10 when a reproduction input signal having an input frequency of 62 Hz is supplied. FIG. 2B is a diagram showing an operation state of the diaphragm 10 when a reproduction input signal having an input frequency of 150 Hz is supplied.
FIG. 3C is a diagram showing an operation state of the diaphragm 10 when a reproduction input signal having an input frequency of 501 Hz is supplied. As apparent from these figures, the diaphragm 10 undergoes a bending operation when a reproduction input signal is applied from the driver unit 11 to generate a complicated vibration mode. In addition, the diaphragm 10 undergoes a bending operation having a larger peak as the frequency of the reproduction input signal increases.

As described above, the panel type speaker device 1 has a limited lid structure 2 by directly driving the diaphragm 10 constituting the lid for opening and closing the device main body 3 without the need for a resonance box or an acoustic tube. Configure a new speaker system in the space. In addition, since the panel type speaker device 1 does not require a support member such as an arrow sheet or a frame for supporting the outer peripheral portion 10c of the diaphragm 10 constituting the lid, the number of parts is small and the assembly process is streamlined. It is manufactured at a reduced cost. Further, the panel type speaker device 1
Has a diaphragm 10 having a large vibrating area, so that it can reproduce and output a larger volume and better sound quality as compared with a conventional built-in speaker device. Furthermore, since the panel-type speaker device 1 constitutes a built-in speaker device of the electronic organizer device 2 by being housed in the lid structure 4, the connecting members and the cumbersome members as in the conventional external speaker device are used. This eliminates the need for a connection operation and does not occupy a large installation space.

In the panel type speaker device 1, the driver unit 5 is connected to the bobbin 14 as described above.
Are joined and fixed to the driven surface 10b of the diaphragm 10 via the distal end of the diaphragm 10, and a driving unit for the diaphragm 10 is formed at this joint. Therefore, the panel-type speaker device 1 has a feature that when an input frequency in a high frequency band is applied, large vibration is hardly transmitted to the outside of the joint. In the panel type speaker device 1, most of the energy of the sound pressure radiated with respect to the input frequency in the high frequency band is emitted not from the whole diaphragm 10 but from the joint thereof.

The panel-type speaker device 1 has a driver unit 11 and a bobbin 14 or a mounting plate (not shown) with respect to the diaphragm 10 in order to extend an effective band in a high frequency band. It may be configured to be attached via a. The panel type speaker device 1 includes the diaphragm 10 and the driver unit 11.
The characteristics of the high frequency band are changed depending on the junction structure. The panel-type speaker device 1 can thereby adjust the frequency band and amplitude at which resonance occurs in the high frequency band, and can combine the frequency response characteristics in the low frequency band and the medium frequency band to improve the frequency response characteristics in the high frequency band. It is possible to take it wider.

In the panel type speaker device 1, in order to improve the frequency response characteristics in a high frequency band, for example, the whole or a part of the driven surface 10b of the diaphragm 10 to which the driver unit 11 is fixedly joined is made of a different material. May be constituted by a mounting plate. For example, when the vibration plate 10 is formed, the mounting plate is integrated by an insert molding method, and is selected from a material that improves response characteristics to a specific input frequency. Therefore, the panel-type speaker device 1 has the same mechanical function as a so-called two-way speaker device in order to make the diaphragm 10 and the mounting plate have different vibration characteristics.

By the way, since the panel type speaker device 1 includes three driver units 11,
These driver units 11 cause the diaphragm 10 to perform independent bending operations. Therefore,
The panel-type speaker device 1 does not drive the node position in each frequency band unless the node position of each driver unit 11 is intentionally set as the vibrating position with respect to the diaphragm 10. Panel type speaker device 1
In the above, the driver units 11 complement the driving of the diaphragm 10 at the nodes in the respective frequency bands, so that the occurrence of sharp peaks and dips in the frequency response characteristics is suppressed. In the panel type speaker device 1, peaks and dips are reduced in the middle frequency band and the high frequency band, and a unique reproduction output according to the size of the diaphragm 10 and its material characteristics is reduced, so that the so-called habit-free sound quality is reduced. Playback output is performed.

The panel type speaker device 1 may be provided with a mass component material which is located in a region where the diaphragm 10 is not hindered and which is formed of a material which easily absorbs vibration. The mass component material is made of, for example, a tape-shaped lead material, and the outer peripheral portion 10 of the sound emission surface 10 a is formed with respect to the diaphragm 10.
c over the entire circumference. As described above, the panel type speaker device 1 is configured such that the diaphragm 10 has its outer peripheral portion 10c.
Is set in an unconstrained state, so that vibration is easily generated in the outer peripheral portion 10c even in a low frequency band, so that a stable reproduction output in a low frequency band can be obtained. The panel-type speaker device 1 includes
The effective frequency band for reproduction is extended by providing a mass component material to c and lowering the frequency of occurrence of the vibration mode in the low frequency band. The mass component material is not limited to the tape-like lead material described above, but may be formed of other material having a large vibration loss or a material having a large vibration reduction.

By the way, in the panel type speaker device 1 described above, the diaphragm 10 is provided with a greater number of driver units 11 so that the diaphragm 10 is driven.
It is possible to keep the area of the zero vibration region larger. Therefore, the panel-type speaker device 1 can improve the sensitivity in the low frequency band, and
Operates in a phase opposite to the joint of the driver unit 11 in the vibration region, so that a lower operating frequency is secured.

A panel type speaker device 20 shown in FIG. 4 as a second embodiment of the present invention has a configuration of an input section 21 for supplying a reproduction input signal to each driver unit 11 for driving the diaphragm 10. Has features. The diaphragm 10 and the driver unit 11 are the same as the diaphragm 10 and the driver unit 11 of the panel type speaker device 1 described above.
Since the same one is used, its description is omitted. The panel type speaker device 20 is configured to drive the diaphragm 10 by independently supplying a reproduction input signal or switching a phase to each driver unit 11 via the input unit 21.

The input section 21 includes an amplifier 22 for amplifying a reproduction input signal supplied from a control section or the like of the apparatus main body 3, and a switching circuit independently connected between the amplifier 22 and each driver unit 11. Switches 23a to 23
c and a series circuit composed of volumes 24a to 24c. The changeover switch 23 performs, for example, an operation of switching the input of the reproduction input signal to each driver unit 11 on and off, and an operation of switching the phase of the reproduction input signal in the input ON state. Each volume 24 adjusts the level of a reproduction input signal that is input to each driver unit 11 and adjusts the level of each driver unit 11.
The sensitivity of each is adjusted individually.

A playback input signal having a required phase component is supplied from the input unit 21 to the panel type speaker device 20 configured as described above via the device body 3.
The panel-type speaker device 20 includes the driver units 11
Are operated independently to drive the diaphragm 10 to emit a reproduced output. Therefore, the panel type speaker device 2
A value of 0 eliminates the need for a special circuit element or switching device, and allows a user to obtain a reproduced output with an appropriately changed sound field, sound quality, and the like by a very simple operation by the user.

The panel-type speaker device 30 shown in FIG. 5 as a third embodiment of the present invention includes three driver units 11a to 11c for driving the diaphragm 10 in the same manner as the panel-type speaker device 20 described above. It has a feature in the configuration of the input unit 31 that supplies a reproduction input signal to each of the driver units 11. That is, the panel-type speaker device system 30 divides the reproduced input signal into three frequency bands at the input unit 31, performs phase adjustment, synthesizes the signals, and supplies the resultant signals to the driver units 11. It is configured to be driven.

The input unit 31 includes band-pass filters 32a to 32c to which a reproduction input signal is supplied from the apparatus main body 3.
Switch units 33 to 35 connected to the band-pass filters 32, mixers 36a to 36c to which reproduction input signals are supplied via the switch units 33 to 35, mixers 36 and drivers It is composed of amplifiers 37a to 37c and the like interposed between the unit 11 and the like. The bandpass filter 32 divides the reproduction input signal supplied from the apparatus main body 3 into predetermined frequency bands.

Each of the changeover switch units 33 to 35 includes:
The three changeover switches 33a to 33c, 34a to 34c, 35a to 35 connected to the mixer 36, respectively.
c. These changeover switches 33a
To 33c, 34a to 34c, 35a to 35c are:
For example, the operation of switching the input of the reproduction input signal to each mixer 36 is performed together with the operation of switching the phase of the reproduction input signal in the input ON state. Each mixer 36
The reproduction input signals of a predetermined frequency band supplied from the respective changeover switch units 33 to 35 are combined and input to each amplifier 37. Each amplifier 37 amplifies the combined reproduction input signal and supplies it to the driver unit 11.

The panel type speaker device 30 is configured as described above, so that the reproduction input signal supplied from the device main body 3 is divided into three frequency bands at the input section 31 and the required phase is obtained. It is adjusted to the component and input. In the panel type speaker device 30, each driver unit 11 is independently operated to drive the diaphragm 10 to emit reproduced sound. Panel type speaker device 30
For example, in the low-frequency band, the reproduction input signal of the in-phase component is all supplied to each driver unit 11, and the reproduction input signal of the opposite-phase component is supplied in the middle frequency band and the high frequency band. Specifically, in the middle-frequency band and the high-frequency band, the panel-type speaker device 30 receives, for example, a reproduction input signal of a positive-phase component in the upper and lower driver units 11a and 11c, and also transmits a signal to the central driver unit 11b. A reproduction input signal of the opposite phase component is input.

The panel-type speaker device 30 is configured so that a reproduced input signal of an in-phase component in a low frequency band is supplied to each driver unit 11.
Is supplied to the vibration plate 10 to cause a large bending operation. Therefore, in the panel type speaker device 30, as described above, the outer peripheral portion 1 of the diaphragm 10
As in the case where the mass component material is adhered to 0c, a peak in a low frequency band is generated, and the response characteristics are improved, that is, the sensitivity is improved. Further, the panel-type speaker device 30 supplies the reproduced input signals of the opposite phase components in the middle frequency band and the high frequency band to each driver unit 11, thereby generating frequency bands that cancel each other out, and the overall sensitivity is reduced. As a result, a reproduction output whose sensitivity is flattened as a whole is output.

In the panel type speaker device 30, a large bending operation is generated in the diaphragm 10 by inputting the reproduction input signal of the opposite phase component to the driver unit 11b at the center, as described above. A reproduction sound specific to the material is output. Therefore, the panel-type speaker device 30 can perform a reverse-phase input to the driver unit 11b by a switching operation of the changeover switch units 33 to 35 of the input unit 31 in a specific frequency band, and generate a unique reproduced sound. .

The panel-type speaker device 40 shown in FIG. 6 as a fourth embodiment of the present invention is intended to suppress the occurrence of the above-described dip portion and excessive peaks and to flatten the frequency response characteristics. Three digital filters 42a
To 42c. That is, the panel-type speaker device 40 includes three driver units 11 a to 11 c that drive the diaphragm 10, similarly to the above-described panel-type speaker device 30, and the respective driver units 1.
And an input unit 41 for supplying a reproduction input signal to the input unit 1. The input unit 41 includes three filters 42 a to 42 c for performing appropriate signal processing on the reproduced input signal supplied from the apparatus main body 3, and amplifies the reproduced input signal that has passed through each of the filters 42 and amplifies each driver unit. 11
And amplifiers 43a to 43c that respectively drive.

In the panel-type speaker device 40, the reproduction input signal supplied from the device main body 3 has a specific frequency at which the above-mentioned dip portion or an excessive peak is generated by each filter 32 having an inverse filter action of the impulse response. The signal is subjected to signal processing such as band separation and the like, and is supplied to each driver unit 11 via the amplifier 33. As a result, the panel-type speaker device 40 emits a reproduction output in which the reproduction frequency characteristic is flattened. Note that the panel-type speaker device 40 can emit a reproduced output in which only a specific frequency band is emphasized by appropriately selecting each filter 32. As each filter 32, an appropriate digital filter or analog filter is used, and a filter that performs not only separation processing of a specific frequency band but also appropriate signal processing such as amplitude and phase on a reproduced input signal is used. .

In the panel-type speaker device 40, an appropriate delay component is given to each filter coefficient of each filter 32 which performs signal processing, supplies a reproduced input signal to each driver unit 11 and drives them. You may make it comprise. In the panel type speaker device 40, the sound wave front of the reproduction output emitted from the diaphragm 10 is controlled by such a configuration, and the main axis thereof can be appropriately shifted from the front.

Further, in the panel type speaker device 40, each filter 3 which performs predetermined signal processing and supplies a reproduction input signal to each driver unit 11 to drive them is provided.
For example, the filter coefficient 2 may be configured by adding an appropriate amplitude component to each filter coefficient. Panel type speaker device 40
By adopting such a configuration, it is possible to provide directivity similarly to the speaker array. Therefore, the panel-type speaker device 40 has a sound emitting unit constituted by a single diaphragm 10, but constitutes a speaker device capable of controlling the directivity of a plurality of input sound sources.

A panel-type speaker device 50 shown in FIG. 7 as a fifth embodiment of the present invention is based on the above-described panel-type speaker device 40 and includes a filter 52 for obtaining target optimum characteristics. 1 shows an example of deployment for preparing for. The panel-type speaker device 50 also has three driver units 11a to 11
c and an input section 51 for supplying a reproduction input signal to each of the driver units 11. The input unit 51 includes a first amplifier 53 to which a reproduction input signal is supplied from the apparatus main body 3, a filter 52, and a second amplifier 54 connected to the filter 52.

The panel type speaker device 50 includes an input section 51.
The first driver units 11a vertically arranged according to the reproduction input signal supplied through the first amplifier 53
And the third driver unit 11c are driven. In addition, the panel type speaker device 50 is provided with a reproduced input signal, which has been subjected to predetermined signal processing by the filter 52 of the input unit 51, through the second amplifier 54, so that the second input unit 51 is disposed at the center. The driver unit 11b is driven. As described above, the panel type speaker device 50
By supplying a reproduction input signal subjected to predetermined signal processing to the driver unit 11b, a vibration mode generated in the diaphragm 10 is controlled.

The panel type speaker device 50 differs from the first driver unit 11a and the third driver unit 11c in that the second driver unit 11b is subjected to, for example, reverse phase processing of the reproduced input signal in the filter 52. Drive in phase. With this configuration, the panel-type speaker device 50 can drive the diaphragm 10 in a vibration mode that cannot be predicted by ordinary material analysis, and as a result, the occurrence of the above-described dip portion and excessive peak is suppressed.

In a panel-type speaker device, a driver unit disposed at a geometrically symmetrical position on a diaphragm is driven by supplying reproduction input signals of opposite phases to each other, thereby driving the diaphragm in a specific frequency band. It is possible to forcibly generate nodes of vibration at equal intervals of these driver units regardless of the material of the driver unit. Therefore, in the panel-type speaker device, the sensitivity adjustment of each frequency band, the improvement of the reproduction frequency characteristic, the adjustment of the sound field and the sound quality, and the like can be performed by skillfully utilizing such a phenomenon.
Of course, the signal processing of the reproduction input signal may be performed by appropriately combining a filter with each driver unit.

A panel-type speaker device 60 shown in FIG. 8 as a sixth embodiment of the present invention has a diaphragm 10, five drive units 11a to 11e, and two control units provided in the device body 3. And an input unit 61 that processes a reproduction input signal supplied from the units 62a and 62b and inputs the processed signal to each drive unit 11. Of course, the panel-type speaker device 60 may be configured to drive one diaphragm 10 by three drive units, similarly to the above-described panel-type speaker devices.

The input unit 61 sequentially outputs a large delay component da with respect to the reproduction input signal supplied from the first control unit 62a.
First delay component supply circuits 63a1 to 63a4 for providing 1, da2, da3, and da4, and a second control unit 62b
And second delay component supply circuits 63b1 to 63b4 for sequentially adding large delay components db1, db2, db3, db4 to the reproduction input signal supplied from. Further, the input unit 61 is supplied with the first mixer 64 a to the fifth mixer 64 e and the first amplifier 65 a to the fifth amplifier 64 a which are supplied with the reproduction input signals mixed in the mixers 64 and drive the respective driver units 11. 5
And an amplifier 65e.

The first mixer 64a includes a first control unit 62
a reproduction input signal supplied from the second control unit 62b
And a reproduction input signal to which a delay component db4 has been added. The second mixer 64b includes a reproduction input signal supplied from the first control unit 62a to which the delay component da1 is added and a reproduction input signal supplied from the second control unit 62b to which the delay component db3 is added. Mixing. The third mixer 64c includes a reproduction input signal supplied from the first control unit 62a to which the delay component da2 has been added, and a delay component db2 supplied from the second control unit 62b.
Is mixed with the reproduction input signal to which is added. The fourth mixer 64d includes a reproduction input signal supplied from the first control unit 62a to which the delay component da3 is added and a reproduction input signal supplied from the second control unit 62b to which the delay component db1 is added. Mixing. Further, the fifth mixer 64e includes a reproduction input signal supplied from the first control unit 62a to which the delay component da4 is added, and a second control unit 62e.
b. and the reproduced input signal supplied from b.

The panel type speaker device 60 is configured such that the reproduction input signals supplied from the first control unit 62a and the second control unit 62b are subjected to signal processing in which the weight of the delay component is changed, and each driver unit 11 is supplied. Therefore, in the panel-type speaker device 60, the drive is gradually performed from the first driver unit 11a to the fifth driver unit 11e according to the delay component d based on the reproduction input signal of the first control unit 62a. Will be Further, in the panel-type speaker device 60, the driving is gradually performed toward the fifth driver unit 11e and the first driver unit 11a according to the delay component d based on the reproduction input signal of the second control unit 62b. Will be

The panel-type speaker device 60 emits the reproduction output based on the reproduction input signal of the first control section 62a from the sound output surface 10a of the diaphragm 10 in the direction indicated by the arrow AA in FIG. Be sounded. In addition, the panel-type speaker device 60 outputs the reproduction output based on the reproduction input signal of the second control unit 62b from the sound emission surface 10a of the diaphragm 10 in FIG.
Sound is emitted in the direction indicated by. Therefore, in the panel-type speaker device 60, different directivities are given to the two-channel sound sources.

A panel-type speaker device 70 shown in FIG. 9 as a seventh embodiment of the present invention drives a diaphragm 10 by five drive units 11a to 11e and controls two control units provided in the device body 3. Parts 62a, 6
The configuration for supplying a reproduction input signal from each of the panel-type speaker devices 60 is the same as that of the panel-type speaker device 60 described above.
It has a feature in the configuration of the input unit 71 that performs signal processing on the reproduction input signal supplied from the two control units 62. Of course, the panel-type speaker device 70 may be configured so that the diaphragm 10 is driven by three drive units, similarly to the above-described panel-type speaker devices.

That is, the input section 71 is supplied from the five first filters 72a1 to 72a5 for processing the reproduced input signal supplied from the first control section 62a and from the second control section 62b. Signal processing of the reproduction input signal 5
Of 10 second filters 72b1 to 72b5
Filters 72 are provided. Also, the input unit 71
Include five mixers 73a to 73e for mixing the reproduced input signal supplied from the first control unit 62a and the reproduced input signal supplied from the second control unit 62b, and the mixers 73a to 73e. The five amplifiers 74 respectively drive the respective driver units 11 by receiving the mixed reproduction input signals.
a to 74e.

The first mixer 73a includes a first control unit 62
The reproduced input signal supplied from the first filter 72a1 and subjected to signal processing in the first filter 72a1 and the reproduced input signal supplied from the second control unit 62b and subjected to signal processing in the fifth filter 72b5 are inputted. The channels are combined and supplied to the first amplifier 74a. Second mixer 73
b is a reproduced input signal supplied from the first controller 62a and subjected to signal processing in the second filter 72a2, and a fourth filter 72b supplied from the second controller 62b.
4 and a reproduced input signal subjected to signal processing,
These are channel-synthesized and supplied to the second amplifier 74b. The third mixer 73c supplies a reproduced input signal supplied from the first control unit 62a and subjected to signal processing in the third filter 72a3, and a reproduced input signal supplied from the second control unit 62b and subjected to signal processing in the third filter 72b3. The reproduced input signal is input to the third amplifier 74c.

The fourth mixer 73d further includes a reproduction input signal supplied from the first control unit 62a and subjected to signal processing in the fourth filter 72a4, and a second control unit 62d.
b and subjected to signal processing in the second filter 72b2 and input thereto, and channel-synthesizing them and supplies the resultant signal to the fourth amplifier 74d. The fifth mixer 73e includes a reproduced input signal supplied from the first control unit 62a and subjected to signal processing in the fifth filter 72a5, and a reproduced input signal supplied from the second control unit 62b and supplied to the first filter 72b1. The signal-processed reproduction input signal is input, and the resultant signal is channel-synthesized and supplied to the fifth amplifier 74e.

Each of the filters 72a and 72b includes, for example, selection of a predetermined frequency band with respect to a reproduction input signal input to each of the filters 72a and 72b, similarly to the filter 42 used in the panel type speaker device 40 described above. A filter having a filter coefficient for performing signal processing of an arbitrary phase or amplitude is used. By using the optimum filters 72a and 72b, the panel-type speaker device 70 can obtain more effective directional characteristics as compared with the panel-type speaker device 60 described above.

The panel type speaker device 70 may be configured to control a specific frequency band with respect to a reproduction input signal supplied to each driver unit 11 for driving the diaphragm 10 by each of the filters 72a and 72b. Good. As a result, the panel-type speaker device 70 can generate a vibration mode having a large number of antinodes and nodes in the diaphragm 10, and can regard each antinode of the vibration mode as a sound source. Generally, in a speaker array, it is necessary to increase the number of sound sources in order to obtain the effect of narrowing the directivity up to a high frequency band, which increases the cost, increases the size of the device, and gives a sense of oppression to the user. There is. As described above, the panel-type speaker device 70 can obtain a desired narrow directivity with a smaller number of driver units 11 and has only one sound emission surface, so that the panel-type speaker device 70 is small and inexpensive. Solve the problem. It is needless to say that the improvement of the narrow directivity in the panel-type speaker device 70 can also be achieved by each of the panel-type speaker devices described above.

Further, in the panel type speaker device 70, for example, the directivity characteristics may be changed by providing a control unit for controlling each filter 72a, 72b to update its filter coefficient with time. Good. By adopting such a configuration, the panel-type speaker device 70 can generate a special acoustic effect such as rotation and movement of the sound output axis without using a special mechanical configuration. Of course, such a configuration can also be employed in each of the panel-type speaker devices described above.

In the present invention, the individual techniques described in the above embodiments may be appropriately combined, and these may be electrically or mechanically switched to drive the diaphragm. Also, in each of the above-described embodiments, the panel type speaker device is incorporated in the lid structure 4 of the electronic organizer 2, but the present invention is not limited to the electronic organizer 2. It is.

[0070]

As described above in detail, according to the panel type speaker device of the present invention, the lid constituting the housing device is driven by the driver unit based on the supplied reproduction input signal. Since it functions as a vibrating body that emits a reproduction output and constitutes a large loudspeaker device with the entire lid as a vibrating surface, it is possible to reduce the size of the device body or to load other mechanisms and functions. In addition, it is possible to emit a reproduction input signal such as audio information with a reproduction output of a sufficient volume and good sound quality which cannot be expected from the built-in speaker device.

[Brief description of the drawings]

FIG. 1 is a perspective view of a use state in which a panel-type speaker device shown as a first embodiment of the present invention is applied to a built-in speaker device of an electronic organizer.

FIG. 2 is a longitudinal sectional view of a main part of a lid structure constituting the panel type speaker device.

FIG. 3 is a diagram illustrating a vibration mode state of a diaphragm formed by a lid in the panel type speaker device.

FIG. 4 is a main part configuration diagram of a panel-type speaker device according to a second embodiment of the present invention in which a diaphragm is driven by three driver units.

FIG. 5 is a main part configuration diagram of another panel-type speaker device that drives a diaphragm by three driver units according to a third embodiment of the present invention.

FIG. 6 is a main part configuration diagram of another panel-type speaker device that drives a diaphragm by three driver units according to a fourth embodiment of the present invention.

FIG. 7 is a main part configuration diagram of another panel-type speaker device that drives a diaphragm by three driver units according to a fifth embodiment of the present invention.

FIG. 8 is a configuration diagram of a main part of a panel-type speaker device that drives a diaphragm by five driver units according to a sixth embodiment of the present invention.

FIG. 9 is a main part configuration diagram of another panel-type speaker device that drives a diaphragm by five driver units according to a seventh embodiment of the present invention.

[Explanation of symbols]

1 panel type speaker device, 2 electronic organizer device (casing device), 3 device main body, 4 lid structure, 5 liquid crystal display, 6
Operating part, 7 hinge mechanism, 8 cover member, 9 middle plate, 10 diaphragm (inner cover member), 10a sound emitting surface, 10
b Driven surface, 10c outer peripheral portion, 11 driver unit, 12 voice coil, 13 magnetic circuit, 14 bobbin, 15 coil portion, 16 center pole, 17 magnet, 18 plate, 19 damper

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kohei Asada 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation

Claims (2)

[Claims] 1. A lid of a housing device formed in a rigid panel shape and having an outer peripheral portion supported in a substantially unconstrained state, a lid attached to a main surface of the lid, and based on a reproduction input signal. At least one driver unit that constitutes an excitation source for causing a partial bending operation on the lid, wherein the lid is driven by the driver unit to generate a reproduction output based on a reproduction input signal. A panel-type speaker device that functions as a vibrating body that emits sound. 2. The information processing device according to claim 1, wherein the housing device is an information terminal device including a display unit, a control unit, a communication unit, and the like. 2. The panel-type speaker device according to claim 1, wherein the display portion and the like are protected and perform reproduction output of sound or the like based on a reproduction input signal in an open state.