CN201623850U - Matrix form piezoelectricity panel speaker with a weighting structure and a damping structure - Google Patents
Matrix form piezoelectricity panel speaker with a weighting structure and a damping structure Download PDFInfo
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- CN201623850U CN201623850U CN2010201493094U CN201020149309U CN201623850U CN 201623850 U CN201623850 U CN 201623850U CN 2010201493094 U CN2010201493094 U CN 2010201493094U CN 201020149309 U CN201020149309 U CN 201020149309U CN 201623850 U CN201623850 U CN 201623850U
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Abstract
The utility model belongs to the piezoelectric speaker technical field, especially relates to a matrix form piezoelectricity panel speaker with a weighting structure and a damping structure, comprising a panel speaker main body with piezoelectric ceramic slices in distribution type arrangement, a flexible circuit board, front, back cavity shells and a weighting structure and a damping structure. The weighting structure is introduced to adjust the quality and rigidity distribution of a speaker piezoelectricity vibrator to optimize its vibration mode, furthermore the acoustic radiation is optimized; the damping structure is introduced to directly adjust the vibration mode of the speaker piezoelectricity vibrator, furthermore the acoustic radiation is optimized. The positions of the weighting structure and the damping structure have the primary effect on the acoustic output of the matrix form panel speaker at the special frequency. The acoustic pressure level frequency response curve flattening degree of the optimized matrix form piezoelectricity panel speaker with the weighting structure and the damping structure is greatly improved and the distortion is reduced and the sound quality is better.
Description
Technical field
The utility model relates to the piezoelectric speaker field, is specifically related to a kind of matrix form piezoelectricity panel speaker that has counter weight construction and damping structure.
Background technology
The basic principle of the vibration sounding part of present most of piezoelectric speakers is: electrode is connected alternating current, because inverse piezoelectric effect, piezoelectric ceramic piece produces vibration, the promotion vibrating diaphragm occurs bending and deformation, thereby produces vibration, and then promotes air vibration, produce acoustic pressure, sound.
The more traditional coil-moving speaker of piezoelectric speaker has little, thin, light, no magnetic interference, characteristics such as low in energy consumption, under the trend of current device slimming, miniaturization, have extremely bright prospect and future in fields such as panel TV, flat-panel monitor, ultrathin notebook PC, portable media players.
Possessing very big advantage than conventional loudspeakers when, also there are some shortcomings in common piezoelectric speaker, and this mainly shows relatively poor on the tonequality.Studies show that, the loud speaker that most of tonequality are good, its frequency response curve is smooth.And the first rank resonance frequency of traditional piezoelectric speaker (frequency of a peak correspondence of frequency response curve) is generally higher, and low frequency characteristic is poor slightly, and promptly the replaying bass effect is slightly poor.For example generally between 1.2kHz～1.4kHz, the first rank resonance frequency of the piezoelectric speaker of 23 * 27 specifications is generally between 600Hz～1kHz for the first rank resonance frequency of the piezoelectric speaker of 13 * 19 specifications.The first rank resonance frequency mainly overall dimension with piezoelectric ceramic piece, oscillating plate, vibrating diaphragm is relevant with concrete the way of restraint.Traditional in addition piezoelectric speaker generally has darker paddy at midband, and distortion is big, lower tone thereby cause.For example the piezoelectric speaker of 13 * 19 specifications is near 10kHz, and the piezoelectric speaker of 23 * 27 specifications is near 5kHz, because the Mid Frequency acoustic radiation at the phase cancellation in space, directly causes sound pressure level to reduce more than the 30db.The piezoelectric speaker frequency response curve of typical 23 * 27 specifications as shown in Figure 1, one tangible deep valley is arranged about 5.5kHz is intermediate frequency paddy to curve as can be seen, and most of coil-moving speaker similar tangible intermediate frequency paddy not.In general, the first rank resonance frequency can be adjusted by optimizing methods such as material, size, boundary condition, thereby expands the low frequency bandwidth, improves low frequency characteristic.And the improvement of intermediate frequency paddy generally has two kinds, or will move on to (for example more than the 10kHz) outside the voiceband of being concerned about behind the intermediate frequency paddy, or reduces on current frequency and even eliminate intermediate frequency paddy.With migration behind the intermediate frequency paddy toward will starting with from aspects such as structure, sizes, and parameters such as structure, size are many-sided to the influence of speaker performance, when being postponed, intermediate frequency paddy is difficult to look after the performance index that other has been adjusted, usually to break known designs, and merely that several KHz of intermediate frequency paddy pusher are just very difficult.And on current frequency, reduce and even eliminate aspect the intermediate frequency paddy, industry never has the method for simple general-purpose, the difficult problem that becomes that the restriction piezoelectric speaker applies and bottleneck.Because people's ear is relatively more responsive to the sound of Mid Frequency, the intermediate frequency paddy distortion that reduces piezoelectric speaker becomes the very crucial technology of designs.The correlation technique that overcomes the above problems also becomes the patent content that each enterprise lays special stress on protecting.
The matrix form piezoelectricity panel speaker that relates to specific to the utility model.Owing to introduced multi-disc piezoelectric ceramic matrix form structure arranged, guaranteeing under the constant situation of thickness, the specification of this loud speaker expands about 46 * 46 to from about 23 * 27 of traditional miniature piezoelectric panel speaker, and then making resonance frequency be reduced to about 300Hz and improve sound output greatly from 1kHz, the parameters such as spacing of piezoelectric ceramic piece can be adjusted the evenness of frequency response curve to a certain extent simultaneously.Yet still very serious through near the intermediate frequency paddy problem of this loud speaker 6kHz after optimizing, and the output attenuatoin of tangible sound is also arranged near 1kHz, this has a greatly reduced quality the raising that has brought low frequency characteristic by raising loud speaker specification.
It is generally acknowledged that reason that intermediate frequency paddy produces is that vibrating diaphragm at loud speaker produces special vibration mode on some frequency range of intermediate frequency, the vibration of vibrating diaphragm different piece test point place on the axis of far field produces the opposite vibration of phase place, thereby cause sound wave interference and cancel out each other, thereby the valley point of acoustic radiation appears.Can reduce and even eliminate intermediate frequency paddy by improving vibrating diaphragm in the pattern of midband.Vibration mode is often closely related with Stiffness Distribution with the quality of vibrating diaphragm, it is not only simple to add small-sized counter weight construction at the ad-hoc location of piezoelectric ceramic piece or vibrating diaphragm, and can reach and improve the piezoelectric transducer vibration mode, the pattern of coupling piezoelectric speaker peak and paddy correspondence reduces and even eliminates the peak of midband and the purpose of paddy.In addition, add small-sized damping structure, introduce damping force, directly adjust the vibration mode of piezoelectric transducer, can play and the counter weight construction similar effects at ad-hoc location.
The matrix form piezoelectricity panel speaker that relates to specific to the utility model.Four outside edges at four piezoelectric ceramic of loud speaker are introduced counter weight construction, can reduce and even eliminate near the intermediate frequency paddy of matrix form piezoelectricity panel speaker 6kHz, and the sound output of other frequency range is not almost had influence (with reference to accompanying drawing 2).Central authorities at speaker diaphragm (or the flexible PCB in oscillating plate centre position) introduce counter weight construction, can make near the acoustic radiation paddy of this loud speaker 1kHz move forward and be coupled with first resonance peak.In a more excellent scheme (with reference to accompanying drawing 3), this structure can make significantly improving of low frequency characteristic, and first resonance frequency only has a little raising (about 250Hz).In addition, applying damping force at each piezoelectric ceramic piece center that matrix form distributes by damping structure also can reach with first resonance frequency and have a little to rise to the cost optimization low frequency characteristic.Above-mentioned counter weight construction and damping structure can exchange to a certain extent, reach similar effects.
Summary of the invention
The purpose of this utility model is the deficiency in view of prior art, a kind of matrix form piezoelectricity panel speaker that has counter weight construction and damping structure is proposed pointedly, can obviously improve of distortion and the sound output attenuatoin of conventional piezoelectric loud speaker, the combination property of loud speaker is greatly improved in special frequency channel.
The technical solution adopted in the utility model is: the structure involving vibrations plate of this piezoelectric speaker, be bonded in and be evenly multi-disc piezoelectric ceramic piece arranged evenly of matrix form on the oscillating plate, oscillating plate is bonded in again on the less plastics vibrating diaphragm of rigidity, and the setting of vibrating diaphragm edge is used for retraining the frame of vibrating diaphragm.Be placed in the groove of back cavity shell with the main body of upper-part as piezoelectric speaker, ante-chamber shell and the back cavity shell mode by mechanical grip is the housing of piezoelectric speaker fixedly, and the while provides the front and back that benefit piezoelectric speaker sounding cavity again.The positive and negative electrode of multi-disc piezoelectric ceramic piece is respectively by the flexible PCB mutual conduction and circuit is caused the flexible PCB of external electrode.On the surface of piezoelectric ceramic piece or the surface of oscillating plate or the surface of vibrating diaphragm be bonded with one or more counter weight constructions, be bonded with one or more damping structures at the inner surface of ante-chamber shell or back cavity shell.
During described panel speaker horizontal positioned, the position of described counter weight construction and damping structure is not overlapping in the projection of vertical direction.
Described counter weight construction is positioned at corner, the outside or the central authorities of each piezoelectric ceramic piece or the central authorities of oscillating plate of each piezoelectric ceramic piece.
During described panel speaker horizontal positioned, described damping structure vertical direction projection be positioned at corner, the outside or the central authorities of each piezoelectric ceramic piece or the central authorities of oscillating plate of each piezoelectric ceramic piece.
Described counter weight construction is cuboid piece, cylindrical piece, pipe piece, annulus, gengon ring or polygon mat structure; Described damping structure also adopts spring or other elastic mechanical elements except that adopting said structure.
Axially cutting of described piezoelectric ceramic piece or oscillating plate and be shaped as circle, ellipse, rectangle or polygon.
Described piezoelectric ceramic piece is individual layer, bilayer or multilayer piezoelectric ceramic sheet.
Described counter weight construction is bonded in the one or both sides of piezoelectric ceramic piece or oscillating plate or vibrating diaphragm; Described damping structure is bonded on the ante-chamber shell or on the back cavity shell or be bonded in simultaneously on ante-chamber shell and the back cavity shell.
The material that described counter weight construction adopts comprises the metal material of iron, copper, and glass, silicon, solid inorganic compounds are at interior Inorganic Non-metallic Materials, and polyvinyl chloride, epoxy resin are at interior high-molecular organic material; The material that described damping structure adopts comprises foam, spring steel, rubber and other elastomeric materials.
Described counter weight construction and damping structure adopt common bonding mode to add or welding manner adds or some adhesive curing mode is added.
The beneficial effects of the utility model are: by Theoretical Calculation and the present product of having prepared of detection, in the piezoelectricity panel speaker, add counter weight construction and damping structure, effectively avoided Mid Frequency and low-frequency range acoustic radiation phase cancellation in the space, the sound pressure level curve flattening degree of piezoelectric speaker is greatly improved, and original matrix form piezoelectricity panel speaker significantly reduced phenomenon of sound pressure level behind Mid Frequency and first resonance peak of low-frequency range no longer occurs.By to the shape of balancing weight and the adjustment of position, the distortion of these two frequency ranges can significantly reduce.Its structure of piezoelectric speaker that the utility model adds balancing weight has novelty and cost is low, excellent performance, has the market competitiveness.
Description of drawings
Fig. 1 is typical piezoelectric speaker frequency response curve figure;
Fig. 2 is the acoustic radiation influences of four jiaos of counter weight constructions to matrix form piezoelectricity panel speaker;
Fig. 3 is the acoustic radiation influence of central counter weight construction to matrix form piezoelectricity panel speaker;
Fig. 4 (a) and Fig. 4 (b) are respectively vertical view (concealing the back cavity shell) and the explosive view of the utility model embodiment 1;
Fig. 5 (a), Fig. 5 (b) and Fig. 5 (c) are respectively explosive view, vertical view and the cutaway view of the utility model embodiment 2;
Fig. 6 (a), Fig. 6 (b) and Fig. 6 (c) are respectively explosive view, vertical view and the cutaway view of the utility model embodiment 3;
Fig. 7 (a) and Fig. 7 (b) are respectively front view and the cutaway view of the utility model embodiment 4;
Number in the figure:
1-external electrode lead-in wire flexible PCB; The 2-housing; 3-ante-chamber shell; The 4-piezoelectric ceramic piece; 5-positive electrode lead-in wire flexible PCB; The 6-counter weight construction; 61-piezoelectric ceramic piece central authorities counter weight construction; 62-piezoelectric ceramic piece outer corners counter weight construction; Turn over the zone on the 8-negative electrode; 9-negative electrode lead-in wire flexible PCB; The 10-oscillating plate; The 11-vibrating diaphragm; 12-back cavity shell; The 13-damping structure; The 14-piezoelectric transducer; The 16-vocal hole; 17-panel TV protecgulum; The 18-display screen; 19-panel TV bonnet; The loud speaker that 20-the utility model proposes; The 21-fastener.
Embodiment
The utility model provides a kind of matrix form piezoelectricity panel speaker that has counter weight construction and damping structure, below in conjunction with description of drawings and embodiment the utility model is described further.
Fig. 4 (a) and Fig. 4 (b) are respectively vertical view (concealing the back cavity shell) and the explosive view of embodiment 1.Be distributed and be symmetrical on four piezoelectric ceramic pieces, 4 bondings that oscillating plate 10 arranges and the oscillating plate 10, oscillating plate 10 is bonded in again on the less plastics vibrating diaphragm 11 of rigidity, and vibrating diaphragm 11 is bonded in and is used for retraining on the housing 2 of vibrating diaphragm.Be placed in the groove of back cavity shell 12 with the main body of upper-part as piezoelectric speaker, the mode of ante-chamber shell 3 and back cavity shell 12 by mechanical grip (the edge tusk root bending clamping of ante-chamber shell 3) be the housing 2 of piezoelectric speaker fixedly, provides the front and back that benefit piezoelectric speaker sounding cavity simultaneously.The positive electrode of four piezoelectric ceramic pieces 4 by positive electrode lead-in wire flexible PCB 5 short circuits together, negative electrode by be communicated with turn over zone 8 on the negative electrode negative electrode lead-in wire flexible PCB 9 short circuits together, positive and negative electrode causes external circuit by external electrode lead-in wire flexible PCB 1 with the positive and negative electrode of each piezoelectric ceramic piece 4 again.
Four outsides of the upper surface of four piezoelectric ceramic pieces 4 edge is bonded with piezoelectric ceramic piece outer corners counter weight construction 62, the material of piezoelectric ceramic piece outer corners counter weight construction 62 is metal material or Inorganic Non-metallic Materials or high-molecular organic materials such as polyvinyl chloride, epoxy resin such as glass, silicon such as iron, copper, area is not more than 4mm * 4mm, highly be not more than 2mm, weight be 0.1 restrain 2 the gram.The central authorities of four piezoelectric ceramic pieces 4 are bonded with piezoelectric ceramic piece central authorities counter weight construction 61, and material is with piezoelectric ceramic piece outer corners counter weight construction 62, and area is not more than 3 * 3mm, highly is not more than 2mm, and weight is 0.2 to restrain 3 grams.Described piezoelectric ceramic piece central authorities' counter weight construction 61 and piezoelectric ceramic piece outer corners counter weight construction 62 are referred to as counter weight construction 6, adopt as the common bonding mode of AB glue bond adds or welding manner adds or put the adhesive curing mode and add.
Fig. 5 (a), Fig. 5 (b) and Fig. 5 (c) are respectively explosive view, vertical view and the cutaway view of the utility model embodiment 2.Most of structure of present embodiment piezoelectric speaker is identical with embodiment 1.Four piezoelectric ceramic piece central authorities counter weight constructions 61 have just been cancelled, and in the inboard of back cavity shell 12 middle position corresponding to oscillating plate 10 is bonded with damping structure 13, damping structure 13 is applied with the damping force of 1N to the 10N size at the middle position of piezoelectric transducer 14 (piezoelectric transducer 14 comprises piezoelectric ceramic piece 4, oscillating plate 10 and vibrating diaphragm 11).The material of described damping structure 13 comprises foam, spring steel (being used for spring structure), rubber elastomeric material, and area is not more than 5mm * 5mm, highly is slightly larger than or equals the gap length of piezoelectric transducer 14 and back cavity shell 12.Described damping structure 13 adopts as the common bonding mode interpolation of AB glue bond or welding manner adds or some adhesive curing mode is added.
Fig. 6 (a), Fig. 6 (b) and Fig. 6 (c) are respectively explosive view, vertical view and the cutaway view of the utility model embodiment 3.Most of structure of present embodiment piezoelectric speaker is identical with embodiment 1.Four piezoelectric ceramic piece central authorities counter weight constructions 61 have just been cancelled, and in the inboard of back cavity shell 12 middle position corresponding to four piezoelectric ceramic pieces 4 is bonded with 4 blocks damping structures 13 respectively, described 4 blocks damping structures 13 are applied with the damping force of 0.5N to the 5N size at the middle position of four piezoelectric ceramic 4.The material of described damping structure 13 is identical with embodiment 2, and area is not more than 3mm * 3mm, highly is slightly larger than or equals the gap length of piezoelectric transducer 14 and back cavity shell 12.Bonding mode is also identical with embodiment 2.
Fig. 7 (a) and Fig. 7 (b) are respectively front view and the cutaway view of the utility model embodiment 4.Present embodiment has proposed an application of the present utility model---panel TV.The loud speaker 20 that the utility model proposes is fixed on the panel TV bonnet 19 by fastener 21, sounds by the vocal hole 16 of panel TV protecgulum 17.The loudspeaker array that a plurality of loud speakers that the utility model proposes 20 constitute is positioned at display screen 18 both sides, not only rationally utilize the space but also can export by raising sound, and the matrix form piezoelectricity panel speaker that has counterweight and damping structure of this process tonequality optimization can satisfy the demand of panel TV to high tone quality fully.From cutaway view 7 (b), the loud speaker 20 that the utility model proposes is fit to the ultra-thin profile of panel TV very much, still has big space with panel TV protecgulum 17, can not make troubles to wiring etc.
More than be several more excellent embodiment of the present utility model, those skilled in the art can make any modification in the scope of claim regulation.
Claims (9)
1. matrix form piezoelectricity panel speaker that has counter weight construction and damping structure, it is characterized in that, oscillating plate (10) is bonded on the vibrating diaphragm (11), vibrating diaphragm (11) is bonded on the housing (2), multi-disc piezoelectric ceramic piece (4) is bonded on the oscillating plate (10) with matrix form arrangement mode, the even distribution, and ante-chamber shell (3) and back cavity shell (12) coat housing (2), piezoelectric ceramic piece (4), oscillating plate (10) and vibrating diaphragm (11); On the surface of piezoelectric ceramic piece (4) or the surface of oscillating plate (10) or the surface of vibrating diaphragm (11) be bonded with one or more counter weight constructions (6), be bonded with one or more damping structures (13) at the inner surface of ante-chamber shell (3) or back cavity shell (12).
2. a kind of matrix form piezoelectricity panel speaker that has counter weight construction and damping structure according to claim 1, it is characterized in that, during described panel speaker horizontal positioned, described counter weight construction (6) is not overlapping in the projection of vertical direction with the position of damping structure (13).
3. a kind of matrix form piezoelectricity panel speaker that has counter weight construction and damping structure according to claim 1, it is characterized in that described counter weight construction (6) is positioned at corner, the outside or the central authorities of each piezoelectric ceramic piece (4) or the central authorities of oscillating plate (10) of each piezoelectric ceramic piece (4).
4. a kind of matrix form piezoelectricity panel speaker that has counter weight construction and damping structure according to claim 1, it is characterized in that, during described panel speaker horizontal positioned, described damping structure (13) is positioned at corner, the outside or the central authorities of each piezoelectric ceramic piece (4) or the central authorities of oscillating plate (10) of each piezoelectric ceramic piece (4) in the projection of vertical direction.
5. a kind of matrix form piezoelectricity panel speaker that has counter weight construction and damping structure according to claim 1 is characterized in that described counter weight construction (6) is cuboid piece, cylindrical piece, pipe piece, annulus, gengon ring or polygon mat structure; Described damping structure (13) also adopts spring or other elastic mechanical elements except that adopting said structure.
6. a kind of matrix form piezoelectricity panel speaker that has counter weight construction and damping structure according to claim 1 is characterized in that the axial cross section of described piezoelectric ceramic piece (4) or oscillating plate (10) is shaped as circle, ellipse, rectangle or polygon.
7. a kind of matrix form piezoelectricity panel speaker that has counter weight construction and damping structure according to claim 1 is characterized in that described piezoelectric ceramic piece (4) is individual layer, bilayer or multilayer piezoelectric ceramic sheet.
8. a kind of matrix form piezoelectricity panel speaker that has counter weight construction and damping structure according to claim 1 is characterized in that described counter weight construction (6) is bonded in the one or both sides of piezoelectric ceramic piece (4) or oscillating plate (10) or vibrating diaphragm (11); Described damping structure (13) is bonded on the ante-chamber shell (3) or back cavity shell (12) is gone up or is bonded in simultaneously on ante-chamber shell (3) and the back cavity shell (12).
9. a kind of matrix form piezoelectricity panel speaker that has counter weight construction and damping structure according to claim 1, it is characterized in that described counter weight construction (6) and damping structure (13) adopt common bonding mode to add or welding manner adds or some adhesive curing mode is added.
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| CN2010201493094U CN201623850U (en) | 2010-03-31 | 2010-03-31 | Matrix form piezoelectricity panel speaker with a weighting structure and a damping structure |
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| CN2010201493094U CN201623850U (en) | 2010-03-31 | 2010-03-31 | Matrix form piezoelectricity panel speaker with a weighting structure and a damping structure |
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Cited By (13)
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| CN103237285A (en) * | 2013-04-15 | 2013-08-07 | 汉得利（常州）电子有限公司 | Composite diaphragm piezoelectric loudspeaker formed by 3D (three-dimensional) printing technology |
| CN103369433A (en) * | 2012-04-01 | 2013-10-23 | 宁波升亚电子有限公司 | Vibration plate |
| WO2014169861A1 (en) | 2013-09-18 | 2014-10-23 | 中兴通讯股份有限公司 | Piezoelectric loudspeaker driving device |
| CN104184359A (en) * | 2013-05-27 | 2014-12-03 | 三星电机株式会社 | Vibration generating apparatus |
| CN104185103A (en) * | 2013-05-21 | 2014-12-03 | 宝德科技股份有限公司 | Earphone |
| TWI621359B (en) * | 2015-07-30 | 2018-04-11 | 大陸商東莞泉聲電子有限公司 | Piezoelectric speaker |
| US20190116406A1 (en) * | 2014-05-20 | 2019-04-18 | Samsung Display Co., Ltd. | Display apparatus |
| CN110049415A (en) * | 2019-03-19 | 2019-07-23 | 华为技术有限公司 | Vibration-sound generating device and electronic equipment |
| CN110874984A (en) * | 2018-08-29 | 2020-03-10 | 乐金显示有限公司 | Display device |
| WO2020253142A1 (en) * | 2019-06-17 | 2020-12-24 | 海信视像科技股份有限公司 | Display apparatus, sound generating substrate, and projection screen |
| CN114025266A (en) * | 2021-10-27 | 2022-02-08 | 惠州市众瑞声电子有限公司 | Noise reduction type passive radiator |
| CN114627784A (en) * | 2017-07-31 | 2022-06-14 | 乐金显示有限公司 | Display device and computing device including the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103369433A (en) * | 2012-04-01 | 2013-10-23 | 宁波升亚电子有限公司 | Vibration plate |
| CN103369433B (en) * | 2012-04-01 | 2017-02-15 | 宁波升亚电子有限公司 | Vibration plate |
| CN103237285A (en) * | 2013-04-15 | 2013-08-07 | 汉得利（常州）电子有限公司 | Composite diaphragm piezoelectric loudspeaker formed by 3D (three-dimensional) printing technology |
| CN103237285B (en) * | 2013-04-15 | 2016-07-06 | 汉得利（常州）电子股份有限公司 | Adopt the composite diaphragm formula piezoelectric speaker of 3D printing technique molding |
| CN104185103A (en) * | 2013-05-21 | 2014-12-03 | 宝德科技股份有限公司 | Earphone |
| CN104184359A (en) * | 2013-05-27 | 2014-12-03 | 三星电机株式会社 | Vibration generating apparatus |
| US9455648B2 (en) | 2013-05-27 | 2016-09-27 | Mplus Co., Ltd. | Vibration generating apparatus |
| WO2014169861A1 (en) | 2013-09-18 | 2014-10-23 | 中兴通讯股份有限公司 | Piezoelectric loudspeaker driving device |
| CN111128059A (en) * | 2014-05-20 | 2020-05-08 | 三星显示有限公司 | Display device |
| US20190116406A1 (en) * | 2014-05-20 | 2019-04-18 | Samsung Display Co., Ltd. | Display apparatus |
| CN111128059B (en) * | 2014-05-20 | 2021-11-23 | 三星显示有限公司 | Display device |
| US11310576B2 (en) | 2014-05-20 | 2022-04-19 | Samsung Display Co., Ltd. | Display apparatus |
| TWI621359B (en) * | 2015-07-30 | 2018-04-11 | 大陸商東莞泉聲電子有限公司 | Piezoelectric speaker |
| CN114627784A (en) * | 2017-07-31 | 2022-06-14 | 乐金显示有限公司 | Display device and computing device including the same |
| CN114627784B (en) * | 2017-07-31 | 2024-03-26 | 乐金显示有限公司 | Display device and computing device including the same |
| CN110874984A (en) * | 2018-08-29 | 2020-03-10 | 乐金显示有限公司 | Display device |
| US11553278B2 (en) | 2018-08-29 | 2023-01-10 | Lg Display Co., Ltd. | Display apparatus |
| CN110049415A (en) * | 2019-03-19 | 2019-07-23 | 华为技术有限公司 | Vibration-sound generating device and electronic equipment |
| US11838720B2 (en) | 2019-03-19 | 2023-12-05 | Huawei Technologies Co., Ltd. | Vibration and sound-making apparatus and electronic device |
| US11564023B2 (en) | 2019-06-17 | 2023-01-24 | Hisense Visual Technology Co., Ltd. | Display apparatus and electromagnetic actuator |
| WO2020253142A1 (en) * | 2019-06-17 | 2020-12-24 | 海信视像科技股份有限公司 | Display apparatus, sound generating substrate, and projection screen |
| CN114025266A (en) * | 2021-10-27 | 2022-02-08 | 惠州市众瑞声电子有限公司 | Noise reduction type passive radiator |
| CN114025266B (en) * | 2021-10-27 | 2024-01-16 | 惠州市众瑞声电子有限公司 | Noise reduction type passive radiator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANDONG GONGDA AUDIO CO., LTD. Effective date: 20140327 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100085 HAIDIAN, BEIJING TO: 100015 CHAOYANG, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140327 Address after: 100015 Beijing City, Chaoyang District Road No. 5 Jiuxianqiao Wanhong blue Tao center C106 Patentee after: King Tone Innovation Patentee after: Shandong Gettop Acoustic Co.,Ltd. Address before: 100085 B, block 11D1, No. 28, information road, Beijing, Haidian District Patentee before: King Tone Innovation |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101103 |