WO2001074114A2 - A loudspeaker - Google Patents

A loudspeaker Download PDF

Info

Publication number
WO2001074114A2
WO2001074114A2 PCT/EP2001/003810 EP0103810W WO0174114A2 WO 2001074114 A2 WO2001074114 A2 WO 2001074114A2 EP 0103810 W EP0103810 W EP 0103810W WO 0174114 A2 WO0174114 A2 WO 0174114A2
Authority
WO
WIPO (PCT)
Prior art keywords
transducer
loudspeaker
liquid crystal
display element
crystal display
Prior art date
Application number
PCT/EP2001/003810
Other languages
French (fr)
Inventor
Winand D'souza
Original Assignee
Nokia Mobile Phones Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Mobile Phones Limited filed Critical Nokia Mobile Phones Limited
Publication of WO2001074114A2 publication Critical patent/WO2001074114A2/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133394—Piezoelectric elements associated with the cells

Definitions

  • This invention relates to a loudspeaker and in particular to a loudspeaker suitable for use with a portable electronic device including a display, such as a mobile radio telephone.
  • loudspeakers comprise an electromechanical transducer for converting variations of electrical energy into corresponding variations of acoustic energy by mechanical movement and so generate sound waves. These sound waves are amplified by a diaphragm. Loudspeakers may be fairly bulky and there has been a drive to reduce the bulk of loudspeakers so that they may be incorporated into smaller and smaller devices.
  • an electromechanical transducer is used suitable for exciting a member having the capability to sustain and propagate input vibrational energy.
  • the transducer typically comprises a motor coil assembly, a magnet assembly disposed concentrically with respect to the motor coil assembly, and means suspending the magnet assembly for axial movement relative to the motor coil assembly.
  • a carrier supports the motor coil assembly and is adapted for connection to the member to be excited.
  • the inventors have realised an alternative way to provide a compact speaker.
  • a loudspeaker for use with a portable electronic device including a display, the loudspeaker comprising a diaphragm and a transducer, the diaphragm comprising a flexible electronic display element having electrical connectors for receiving electrical signals representing information for display on the electronic display element and the transducer being attached to the electronic display element such that the transducer causes the electronic display element to resonate/vibrate when a mechanical excitation signal is output from the transducer.
  • the invention results in a compact loudspeaker since the diaphragm is provided by the electronic display element and the transducer is attached to the display element. Thus a separate acoustics device is no longer necessary.
  • the transducer is placed on the face of the display element that is not to be viewed by a user.
  • the transducer is an electromechanical transducer.
  • a loudspeaker according to the invention is particularly advantageous since there is no need for the provision of audio egress apertures in a device incorporating such a loudspeaker.
  • the device is likely to be more waterproof and dustproof than conventional devices which do require such apertures.
  • the electronic display element is a liquid crystal display, most advantageously one made of a plastics material.
  • the electronic display element may be substantially planar and may be foldable.
  • an array of electromechanical transducers may be provided on the flexible electronic display element, the excitation signal being input to each transducer.
  • a loudspeaker comprising a transducer and a liquid crystal display device
  • the liquid crystal display device comprising a first flexible substrate, electrode circuitry and electrical circuitry disposed on the first flexible substrate, a second substrate, the first and second substrate being arranged in a mutually opposing planar relationship and a liquid crystal material disposed between the first and second substrates, wherein the transducer is fixedly attached to the liquid crystal display device such that mechanical movement of the transducer is transmitted to the liquid crystal display device causing the liquid crystal display device to vibrate.
  • Figure 1 shows a front plan view of a portable electronic device incorporating a loudspeaker in accordance with the invention
  • Figure 2 shows a front plan view of a loudspeaker in accordance with the invention
  • Figure 3 shows a cross-sectional view of the loudspeaker of Figure 2 along the line A-A;
  • Figure 4 shows a rear plan view of the loudspeaker of Figure 2;
  • Figure 5 shows a second embodiment of a loudspeaker in accordance with the invention.
  • FIG. 1 shows an example of a portable electronic device including a display.
  • the device shown is a portable radiotelephone, however the invention is applicable to many other applications.
  • the portable telephone comprises a housing 1 , display area 2 and a user interface 3 in the form of a keypad.
  • user interface such as a joystick, roller key or touch screen.
  • the display area 2 also provides the loudspeaker functions of the device.
  • FIG 2 shows a front plan view of a loudspeaker in accordance with the invention.
  • the loudspeaker 4 comprises a flexible display element 6, such as a liquid crystal display (LCD) element, and an electromechanical transducer 8 (see Figure 3).
  • the LCD element 6 acts as a diaphragm for the transducer 8.
  • the flexible display element is capable of sustaining and propagating vibrational energy input thereto by the electromechanical transducer 8.
  • the liquid crystal display device 6 comprises a first flexible substrate 64 and a second flexible substrate 68.
  • the first flexible substrate 64 has first and second opposing sides and electrode circuitry 62 and electrical circuitry 63 is disposed on the first side of the first flexible substrate 64.
  • Information for display on the electronic display element 6 is input to the electrical circuitry in the form of electrical signals.
  • the first substrate 64 and the second substrate 68 are arranged in a mutually opposing planar relationship and a liquid crystal material 65 is disposed between the first and second substrates.
  • a circuitry pattern is formed on the inner surface of the first flexible substrate 64.
  • the electrical circuitry comprises electrode segments 62 and electrical connectors 63.
  • the electrode elements 62 can be activated to form features displayed on the LCD element 6.
  • a typical example of a seven-segment feature is shown, which may be used to represent alpha-numeric characters. For simplicity, the only two such features are shown on the LCD element of Figure 2.
  • the LCD element is capable of displaying many such features at a time and many varieties of feature other than alphanumeric characters e.g. graphical features.
  • Each electrode element 62 has an electrical connector 63 that connects the electrodes 62 to a driver circuit 9.
  • the driver circuit 9 may be provided on the same face of the substrate 64 as the circuitry pattern 62, 63. Alternatively, the driver circuit 9 may be provided on the rear face of the substrate 64 or elsewhere.
  • the electrode elements 62 and electrical connectors 63 may be formed in any conventional manner e.g. by depositing a layer of indium/tin oxide on the substrate 64 and etching it using conventional photolithography.
  • the substrates 64, 68 are typically made of thin plastic material, for example polyester.
  • the second flexible substrate 68 may also have electrical connectors and electrode elements 69 deposited thereon.
  • the second substrate 68 is bonded to the first substrate 67 using a sealant 67 around the perimeter of the substrate.
  • the sealant 67 is typically an epoxy or other type of adhesive used to hold the two substrates together and also to seal in liquid crystal material 65. Additional elements, such as spacers between the two substrates, may be used to maintain the separation between the two substrates.
  • a suitable liquid crystal display device is the Sharp plastic LCD LH155p.
  • This plastic LCD has sufficient flexibility to be excited by the multifunction transducer from Tokin MMA-15N-1 and to sustain and propagate vibrational energy input thereto by the electromechanical transducer 8.
  • a 40x30mm thick LCD having a thickness of 0.6mm may be suitable.
  • FIG 4 shows a rear plan view of the loudspeaker in accordance with the invention.
  • An electromechanical transducer is provided on the rear face of the LCD element 6.
  • the coil of the transducer 8 is attached to the LCD element 6 by means of adhesive.
  • the adhesive should have minimum elasticity to avoid any acoustic loss.
  • Connectors 10 are provided to provide an excitation signal to the transducer 8.
  • the loudspeaker does not operate as a single point sound source, as is the case with conventional loudspeakers in portable devices. Instead the signal from the transducer is distributed across the flexible display element.
  • the invention is applicable to monochrome display elements as well as colour display elements.
  • the device shown in the drawings is a portable radio telephone.
  • the invention is applicable to many other devices with displays, such as other portable telecommunications devices, personal digital assistants (PDAs), laptop computers and personal computers.
  • PDAs personal digital assistants
  • laptop computers laptop computers
  • personal computers The examples of devices with which the invention may be used are not intended to be limiting.

Abstract

A loudspeaker for use with a portable electronic device including a display, the loudspeaker comprising a flexible electronic display element (6), such as a plastic liquid crystal display element, and a transducer (8) attached to the display such that the transducer causes the display to vibrate when an excitation signal is output from the transducer.

Description

A LOUDSPEAKER
This invention relates to a loudspeaker and in particular to a loudspeaker suitable for use with a portable electronic device including a display, such as a mobile radio telephone.
Conventionally loudspeakers comprise an electromechanical transducer for converting variations of electrical energy into corresponding variations of acoustic energy by mechanical movement and so generate sound waves. These sound waves are amplified by a diaphragm. Loudspeakers may be fairly bulky and there has been a drive to reduce the bulk of loudspeakers so that they may be incorporated into smaller and smaller devices.
Generally an electromechanical transducer is used suitable for exciting a member having the capability to sustain and propagate input vibrational energy. The transducer typically comprises a motor coil assembly, a magnet assembly disposed concentrically with respect to the motor coil assembly, and means suspending the magnet assembly for axial movement relative to the motor coil assembly. A carrier supports the motor coil assembly and is adapted for connection to the member to be excited.
The inventors have realised an alternative way to provide a compact speaker.
In accordance with the invention there is provided a loudspeaker for use with a portable electronic device including a display, the loudspeaker comprising a diaphragm and a transducer, the diaphragm comprising a flexible electronic display element having electrical connectors for receiving electrical signals representing information for display on the electronic display element and the transducer being attached to the electronic display element such that the transducer causes the electronic display element to resonate/vibrate when a mechanical excitation signal is output from the transducer. The invention results in a compact loudspeaker since the diaphragm is provided by the electronic display element and the transducer is attached to the display element. Thus a separate acoustics device is no longer necessary. Preferably the transducer is placed on the face of the display element that is not to be viewed by a user.
Preferably the transducer is an electromechanical transducer.
A loudspeaker according to the invention is particularly advantageous since there is no need for the provision of audio egress apertures in a device incorporating such a loudspeaker. Thus the device is likely to be more waterproof and dustproof than conventional devices which do require such apertures.
Preferably the electronic display element is a liquid crystal display, most advantageously one made of a plastics material. The electronic display element may be substantially planar and may be foldable.
To increase the audio output level of the loudspeaker, an array of electromechanical transducers may be provided on the flexible electronic display element, the excitation signal being input to each transducer.
In accordance with a second aspect of the invention there is provided a loudspeaker comprising a transducer and a liquid crystal display device, the liquid crystal display device comprising a first flexible substrate, electrode circuitry and electrical circuitry disposed on the first flexible substrate, a second substrate, the first and second substrate being arranged in a mutually opposing planar relationship and a liquid crystal material disposed between the first and second substrates, wherein the transducer is fixedly attached to the liquid crystal display device such that mechanical movement of the transducer is transmitted to the liquid crystal display device causing the liquid crystal display device to vibrate. The invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 shows a front plan view of a portable electronic device incorporating a loudspeaker in accordance with the invention;
Figure 2 shows a front plan view of a loudspeaker in accordance with the invention;
Figure 3 shows a cross-sectional view of the loudspeaker of Figure 2 along the line A-A; Figure 4 shows a rear plan view of the loudspeaker of Figure 2; and
Figure 5 shows a second embodiment of a loudspeaker in accordance with the invention.
Figure 1 shows an example of a portable electronic device including a display. The device shown is a portable radiotelephone, however the invention is applicable to many other applications. The portable telephone comprises a housing 1 , display area 2 and a user interface 3 in the form of a keypad.
Other forms of user interface may be used, such as a joystick, roller key or touch screen.
In accordance with the invention the display area 2 also provides the loudspeaker functions of the device.
Figure 2 shows a front plan view of a loudspeaker in accordance with the invention. The loudspeaker 4 comprises a flexible display element 6, such as a liquid crystal display (LCD) element, and an electromechanical transducer 8 (see Figure 3). The LCD element 6 acts as a diaphragm for the transducer 8. The flexible display element is capable of sustaining and propagating vibrational energy input thereto by the electromechanical transducer 8.
The liquid crystal display device 6 comprises a first flexible substrate 64 and a second flexible substrate 68. The first flexible substrate 64 has first and second opposing sides and electrode circuitry 62 and electrical circuitry 63 is disposed on the first side of the first flexible substrate 64. Information for display on the electronic display element 6 is input to the electrical circuitry in the form of electrical signals. The first substrate 64 and the second substrate 68 are arranged in a mutually opposing planar relationship and a liquid crystal material 65 is disposed between the first and second substrates.
A circuitry pattern is formed on the inner surface of the first flexible substrate 64. The electrical circuitry comprises electrode segments 62 and electrical connectors 63. The electrode elements 62 can be activated to form features displayed on the LCD element 6. A typical example of a seven-segment feature is shown, which may be used to represent alpha-numeric characters. For simplicity, the only two such features are shown on the LCD element of Figure 2. However it will be clear to a person skilled in the art that, in practice, the LCD element is capable of displaying many such features at a time and many varieties of feature other than alphanumeric characters e.g. graphical features.
Each electrode element 62 has an electrical connector 63 that connects the electrodes 62 to a driver circuit 9. The driver circuit 9 may be provided on the same face of the substrate 64 as the circuitry pattern 62, 63. Alternatively, the driver circuit 9 may be provided on the rear face of the substrate 64 or elsewhere.
The electrode elements 62 and electrical connectors 63 may be formed in any conventional manner e.g. by depositing a layer of indium/tin oxide on the substrate 64 and etching it using conventional photolithography. The substrates 64, 68 are typically made of thin plastic material, for example polyester.
As can be seen in Figure 3, the second flexible substrate 68 may also have electrical connectors and electrode elements 69 deposited thereon. The second substrate 68 is bonded to the first substrate 67 using a sealant 67 around the perimeter of the substrate. The sealant 67 is typically an epoxy or other type of adhesive used to hold the two substrates together and also to seal in liquid crystal material 65. Additional elements, such as spacers between the two substrates, may be used to maintain the separation between the two substrates.
An example of a suitable liquid crystal display device is the Sharp plastic LCD LH155p. This plastic LCD has sufficient flexibility to be excited by the multifunction transducer from Tokin MMA-15N-1 and to sustain and propagate vibrational energy input thereto by the electromechanical transducer 8. For a portable telecommunications device such as a radiotelephone, a 40x30mm thick LCD having a thickness of 0.6mm may be suitable.
Figure 4 shows a rear plan view of the loudspeaker in accordance with the invention. An electromechanical transducer is provided on the rear face of the LCD element 6. The coil of the transducer 8 is attached to the LCD element 6 by means of adhesive. The adhesive should have minimum elasticity to avoid any acoustic loss. Connectors 10 are provided to provide an excitation signal to the transducer 8.
When an electrical excitation signal is supplied to the electro-magnetic transducer 8, the electrical excitation signal is converted into a mechanical movement of the transducer. This mechanical movement (or mechanical excitation signal) is transferred to the flexible LCD element 6 since the coil of the transducer is fixed firmly to the LCD element. The LCD element 6 therefore vibrates and forms longitudinal sound waves which are centred on the area of the LCD to which the transducer is attached, as shown in Figure 3.
This has the benefit that the loudspeaker does not operate as a single point sound source, as is the case with conventional loudspeakers in portable devices. Instead the signal from the transducer is distributed across the flexible display element.
While preferred embodiments of the invention have been illustrated and described, it is clear that the invention is not intended to be limited to these examples. Numerous modifications will occur to those skilled in the art without departing from the spirit and scope of the present invention as defined in the claims. For example, if a greater audio output is required than could be provided by a single transducer of a given weight and size, an array of transducers 8 may be provided on the display element 6, the audio excitation signal being fed to each of the transducers via connectors 10. An example of such a loudspeaker is shown in Figure 5. The transducers 8 produce vibrations in the flexible display element 6 as shown by the dotted lines 50.
The invention is applicable to monochrome display elements as well as colour display elements.
The device shown in the drawings is a portable radio telephone. However the invention is applicable to many other devices with displays, such as other portable telecommunications devices, personal digital assistants (PDAs), laptop computers and personal computers. The examples of devices with which the invention may be used are not intended to be limiting.

Claims

Claims
1. A loudspeaker for use with a portable electronic device including a display, the loudspeaker comprising a diaphragm and a transducer, the diaphragm comprising a flexible electronic display element having electrical connectors for receiving electrical signals representing information for display on the electronic display element and the transducer being attached to the electronic display element such that the transducer excites the electronic display element when a mechanical excitation signal is output from the transducer.
2. A loudspeaker according to claim 1 wherein the electronic display element is a liquid crystal display.
3. A loudspeaker according to claim 1 or 2 further comprising a plurality of electromechanical transducers attached to the electronic display element.
4. A loudspeaker according to any of claims 1 to 3 wherein the flexible display element is substantially planar.
5. A loudspeaker according to any of claims 1 to 4 wherein the transducer is an electromechanical transducer.
6. A loudspeaker comprising a transducer and a liquid crystal display device, the liquid crystal display device comprising a first flexible substrate having first and second opposing sides, electrode and electrical circuitry disposed on the first side, a second substrate, the first and second substrate being arranged in a mutually opposing planar relationship and a liquid crystal material disposed between the first and second substrates, wherein the transducer is fixedly attached to the liquid crystal display device such that mechanical movement of the transducer is transmitted to the liquid crystal display device causing the liquid crystal display device to vibrate.
7. A device incorporating a loudspeaker according to any preceding claim.
8. A portable device incorporating a loudspeaker according to any of claims 1 to 5.
9. A portable radio communications device incorporating a loudspeaker according to any of claims 1 to 5.
10. A loudspeaker substantially as described herein with reference to any of the accompanying drawings.
PCT/EP2001/003810 2000-03-29 2001-03-27 A loudspeaker WO2001074114A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0007624.0 2000-03-29
GB0007624A GB2360901A (en) 2000-03-29 2000-03-29 A loudspeaker which uses an electronic display as a diaphragm

Publications (1)

Publication Number Publication Date
WO2001074114A2 true WO2001074114A2 (en) 2001-10-04

Family

ID=9888672

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/003810 WO2001074114A2 (en) 2000-03-29 2001-03-27 A loudspeaker

Country Status (2)

Country Link
GB (1) GB2360901A (en)
WO (1) WO2001074114A2 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2373398A (en) * 2000-11-28 2002-09-18 Nec Corp Mobile telephone has transparent speaker over display
WO2003049493A1 (en) * 2001-11-27 2003-06-12 Siemens Aktiengesellschaft Display window for radiation of sounds in communication and multimedia devices
WO2006003166A1 (en) * 2004-07-02 2006-01-12 Siemens Aktiengesellschaft Audiovisual arrangement
US8441790B2 (en) 2009-08-17 2013-05-14 Apple Inc. Electronic device housing as acoustic input device
GB2513089A (en) * 2013-01-07 2014-10-22 Nokia Corp A speaker construction comprising a cellular engine
US8934228B2 (en) 2011-03-21 2015-01-13 Apple Inc. Display-based speaker structures for electronic devices
US8988396B2 (en) 2010-01-20 2015-03-24 Apple Inc. Piezo-based acoustic and capacitive detection
JP2015219528A (en) * 2014-05-20 2015-12-07 三星ディスプレイ株式會社Ｓａｍｓｕｎｇ Ｄｉｓｐｌａｙ Ｃｏ．，Ｌｔｄ． Display device
EP3142385A1 (en) 2015-09-14 2017-03-15 Vestel Elektronik Sanayi ve Ticaret A.S. Sound reproducing display
JPWO2018123288A1 (en) * 2016-12-27 2019-10-31 ソニー株式会社 Display device

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100357033B1 (en) * 2000-12-14 2002-10-18 삼성전자 주식회사 Mounting structure for panel-type speaker
DE50107300D1 (en) 2001-10-08 2005-10-06 Siemens Ag Mobile communication terminal arranged in the device housing flat speaker and another transducer arranged to a two-way system with the flat speaker
JP3886391B2 (en) 2002-02-15 2007-02-28 シャープ株式会社 CARD-TYPE DEVICE AND ELECTRONIC DEVICE HAVING THE SAME
EP1345391B1 (en) * 2002-03-12 2006-05-24 BenQ Mobile GmbH & Co. oHG Communication terminal including a flat loudspeaker operated over a turn arrengement
DE10219641A1 (en) * 2002-05-02 2003-12-18 Siemens Ag Display with integrated loudspeaker and method for detecting touches of a display
KR100690489B1 (en) * 2002-09-03 2007-03-09 샤프 가부시키가이샤 Liquid crystal display device having sound output function and the like and electronic device using the same
JP4266923B2 (en) * 2004-12-27 2009-05-27 埼玉日本電気株式会社 Flat panel speaker mounting method, electronic device assembling method, gasket member, diaphragm, and flat panel speaker
US8879771B2 (en) 2010-04-08 2014-11-04 Nokia Corporation Apparatus and method for sound reproduction
WO2011132012A1 (en) 2010-04-20 2011-10-27 Nokia Corporation An apparatus and associated methods
US8831248B2 (en) 2010-08-04 2014-09-09 Nokia Corporation Apparatus with directivity pattern

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6161598A (en) * 1984-09-03 1986-03-29 Matsushita Electric Ind Co Ltd Acoustic device
JPH10164193A (en) * 1996-11-26 1998-06-19 Matsushita Electric Ind Co Ltd Portable terminal equipment
JP3597061B2 (en) * 1998-11-13 2004-12-02 日本電気株式会社 Piezo speaker

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2373398B (en) * 2000-11-28 2004-12-01 Nec Corp Electronic device
US7305248B2 (en) 2000-11-28 2007-12-04 Nec Corporation Electronic device
GB2373398A (en) * 2000-11-28 2002-09-18 Nec Corp Mobile telephone has transparent speaker over display
WO2003049493A1 (en) * 2001-11-27 2003-06-12 Siemens Aktiengesellschaft Display window for radiation of sounds in communication and multimedia devices
WO2006003166A1 (en) * 2004-07-02 2006-01-12 Siemens Aktiengesellschaft Audiovisual arrangement
JP2008504766A (en) * 2004-07-02 2008-02-14 シーメンス　アクチエンゲゼルシヤフト Audio visual equipment
US8441790B2 (en) 2009-08-17 2013-05-14 Apple Inc. Electronic device housing as acoustic input device
US8988396B2 (en) 2010-01-20 2015-03-24 Apple Inc. Piezo-based acoustic and capacitive detection
US8934228B2 (en) 2011-03-21 2015-01-13 Apple Inc. Display-based speaker structures for electronic devices
GB2513089B (en) * 2013-01-07 2019-12-11 Nokia Technologies Oy A speaker apparatus for a mobile device
US10405077B2 (en) 2013-01-07 2019-09-03 Nokia Technologies Oy Speaker apparatus
GB2513089A (en) * 2013-01-07 2014-10-22 Nokia Corp A speaker construction comprising a cellular engine
US11109128B2 (en) 2013-01-07 2021-08-31 Nokia Technologies Oy Speaker apparatus
US11889251B2 (en) 2013-01-07 2024-01-30 Nokia Technologies Oy Speaker apparatus
JP2015219528A (en) * 2014-05-20 2015-12-07 三星ディスプレイ株式會社Ｓａｍｓｕｎｇ Ｄｉｓｐｌａｙ Ｃｏ．，Ｌｔｄ． Display device
US20190116406A1 (en) * 2014-05-20 2019-04-18 Samsung Display Co., Ltd. Display apparatus
US11310576B2 (en) 2014-05-20 2022-04-19 Samsung Display Co., Ltd. Display apparatus
EP3142385A1 (en) 2015-09-14 2017-03-15 Vestel Elektronik Sanayi ve Ticaret A.S. Sound reproducing display
US10511912B2 (en) 2015-09-14 2019-12-17 Vestel Elektronik Sanayi Ve Ticaret A.S. Sound reproducing display
JPWO2018123288A1 (en) * 2016-12-27 2019-10-31 ソニー株式会社 Display device
JP7024731B2 (en) 2016-12-27 2022-02-24 ソニーグループ株式会社 Display device

Also Published As

Publication number Publication date
GB2360901A (en) 2001-10-03
GB0007624D0 (en) 2000-05-17

Similar Documents

Publication Publication Date Title
WO2001074114A2 (en) A loudspeaker
JP4779526B2 (en) Panel speaker
EP1271998B1 (en) Speaker system, mobile terminal device, and electronic device
KR100690489B1 (en) Liquid crystal display device having sound output function and the like and electronic device using the same
US7579758B2 (en) Substrate supporting vibration structure, input device having haptic function, and electronic device
EP1507438B1 (en) Sound reproduction device and portable terminal apparatus
KR100855366B1 (en) Display and speaker module
JP4186449B2 (en) Input device and portable device using the same
US7283637B2 (en) Exciting device
EP1475988B1 (en) Card-type sound apparatus and electronic appliance provided therewith
WO2015005103A1 (en) Vibration device and electronic device using same
EP1655994A2 (en) Flat panel speaker
JP2003211087A (en) Vibration actuator and display device
US9386367B2 (en) Electronic apparatus with detachable speakers, a body unit and a control unit
JP2007110382A (en) Display device integrated with speaker
CN101253804A (en) Speaker, image element protective screen, case of terminal, and terminal
JP7208389B2 (en) mobile computer
JP6073071B2 (en) Electronics
WO2002021881A1 (en) Display window having voice input/output function
KR101481426B1 (en) Mobile communication terminal having plat panel sound output apparatus and method for generating vibration thereof
JP2002232542A (en) Portable communication equipment
JP2004200729A (en) Display apparatus with pronouncing function
JP2014085932A (en) Vibration device, and electronic apparatus
JP5812879B2 (en) Electronic device and portable terminal equipped with the same
JP3994714B2 (en) Panel switch and electronic device using the same

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): DE JP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642