Goertek Inc.

Goertek Optical Technology Co., Ltd.

Chao Jiang

Jianbin Yang

Zhi Li

Qijin Jiao

Bin Jiang

Xiaodong Guo

Ting Wang

Qing Miao

Dong Qiu

Yi Rao

Qianqian Song

Xuelu Liu

Xin Cheng

Rudong Wei

Lang Shen

Xiao Wu

Zhentao Fan

Disclosed are a light guide device, an optical display system, and a display device. The light guide device includes a substrate and a first diffraction structure provided at the substrate. The first diffraction structure includes a first grating. The first grating includes a plurality of first grating units provided at intervals of a first period Palong a first vector direction uand at intervals of a second period Palong a second vector direction u. The first vector direction uis intersected with the second vector direction u, the first period Pis longer than the second period P, forming unequal periods in two vector directions, and the first period Pis at least 1.5 times the second period P

Light guide device, optical display system and display device

A method and a system for acquiring the natural frequency of a diaphragm, wherein, the method comprises: selecting test frequency points in a closed space, converting an electric signal into an acoustic signal, directing sound into the closed space, and acquiring the acoustic pressure of each test frequency point; adjusting the electric signal until the acoustic pressure of each test frequency point is the same; converting the adjusted electric signal into an acoustic signal; acquiring the displacement generated by the vibration of the diaphragm; and taking the frequency corresponding to the maximum displacement of the diaphragm as the natural frequency of the diaphragm. By adopting the method and system, the natural frequency of the diaphragm is determined by acquiring the maximum displacement of the diaphragm. Moreover, the process of acquiring the natural frequency of the diaphragm is not affected by surrounding environment, and therefore the acquired result is more accurate.

Method and system for acquiring natural frequency of diaphragm

A tablet woofer and an electronic device using same. The woofer comprises a vibrating diaphragm, at least four mutually independent drive units (), and a housing (). The vibrating diaphragm is a rectangle shape, and comprises a rigid arc portion () at the central position and a spiral curve portion () at the periphery; the drive unit () comprises a voice coil unit and a corresponding magnetic circuit unit, and four angles of the arc portion () of the vibrating diaphragm are each combined with one voice coil unit; the housing () is provided with mounting holes () for accommodating and mounting the drive units (), and sound holes penetrating through the mounting plane; the spiral curve portion () of the vibrating diaphragm is fixedly connected to the periphery of the upper side of the housing ().

Tablet woofer and electronic device using same

The present invention relates to the technical field of electroacoustic products. Disclosed is a miniature speaker. The miniature speaker comprises an upper housing and a lower housing combined together. A vibration system and a magnetic circuit system are accommodated in the space defined by the upper housing and the lower housing. The upper housing is disposed close to the vibration system. The miniature speaker also comprises a hearing-aid voice coil. The hearing-aid voice coil is fixed to the upper housing and is located at the inner side of the upper housing. The miniature speaker of the present invention solves the problem of poor acoustics caused by collision of a lead wire of a vibrating voice coil with a hearing-aid voice coil of a miniature speaker in the prior art, and the miniature speaker of the present invention has good acoustic performance and a better hearing-aid effect.

Miniature speaker

The present application provides a loudspeaker diaphragm, comprising a first surface layer, a middle layer and a second surface layer, that are in a stacked structure. The loudspeaker diaphragm is characterized in that: at least one surface layer of the first surface layer and the second surface layer has a composite structure which is composed of a base layer and a reinforcing layer, and the other surface layer comprises a base layer; the base layer is a poly(ether-ether-ketone) layer, a polyarylester layer, a polyethylene terephthalate layer, a polyetherimide layer or a composite structure composed of any two of the above layers, and the reinforcing layer is a thermoplastic polyurethane elastomer layer or a thermoplastic elastomer layer. The loudspeaker diaphragm can reduce diaphragm breakage after power test is performed on a loudspeaker product, improve substrate toughness and improve acoustical property of the loudspeaker.

Loudspeaker diaphragm

A multi-diaphragm speaker comprises at least four diaphragms, inner connecting rods, and outer connecting rods. The diaphragms located at odd-numbered positions are connected to the inner connecting rods via connecting points, and then the inner connecting rods are connected via the outer connecting rods, thus forming a first set of diaphragms. The diaphragms located at even-numbered positions are connected to the inner connecting rods via connecting points, and then the inner connecting points are connected via the outer connecting rods, thus forming a second set of diaphragms. The long rods and short rods of the inner connecting rods in the first set of diaphragms and in the second set of diaphragms are staggered. The present invention can implement connection of diaphragms without requiring penetration of the diaphragms, thus preventing occurrences of air leakage and poor sound quality, and enhancing sound effects of the speaker.

Multi-diaphragm speaker

A loudspeaker vibration system includes a diaphragm body part and a voice coil engaged at a lower side of the diaphragm body part. The diaphragm body part includes a rigid dome part, a silicon rubber membrane, and a plastic support engaged to an edge of the silicon rubber membrane. The dome part is engaged at a middle position of the silicon rubber membrane. A convex or concave bent ring part is provided at a location at an outer side of the dome part on the silicon rubber membrane. A spacing between the edge at an outer side of the dome part and an edge of the bent ring part closer to the dome part is in a range of 0.02 mm and 0.2 mm, and colloid is disposed in a gap between the dome part and the bent ring part. The loudspeaker vibration system according to the present disclosure may improve product sensitivity, reduce distortion and enhance acoustic performance of the product.

Loudspeaker vibration system

A multi-diaphragm speaker system comprises a speaker apparatus and a front/rear cavity sealing apparatus. The speaker apparatus comprises at least four diaphragms. Cavities of the speaker apparatus are formed between every two adjacent diaphragms of the speaker apparatus. The cavities that are spaced apart from each other jointly form a first acoustic cavity of the speaker apparatus. The cavities adjacent to the first acoustic cavity form a second acoustic cavity of the speaker apparatus. The first acoustic cavity and the second acoustic cavity are separated via the front/rear cavity sealing apparatus. Utilization of the present utility model solves the problem of speaker front/rear cavity separation.

Multi-diaphragm speaker system

A woofer speaker is provided, comprising a woofer speaker unit, a first sealing pad, a second sealing pad and a housing. The first sealing pad is fixed closely with the outer edge of the housing; the woofer speaker unit is fixed and sealed within the housing by the first sealing pad, and the second sealing pad is located between the woofer speaker unit and the housing; a sound hole is provided on the housing, and the shape and size of the sound hole correspond to those of the woofer speaker; and the terminal installation plane is the rear cover of the woofer speaker, and together with the housing forms the rear sound cavity of the woofer speaker through the first sealing pad. The cavity of the woofer speaker provided by the invention and the installation terminal applying the woofer speaker resolve the rear cover vibration problem of ultra-thin woofer speakers.

Woofer speaker and the rear sound cavity forming method thereof

A speaker comprises at least four diaphragms, inner connecting rods, outer connecting rods, and a cavity sealing housing. Diaphragms spaced apart from each other respectively form a set of diaphragms. The two sets of diaphragms move relative to each other. Connecting points are provided on rigid domes of each of the diaphragms. The inner connecting rods are connected to the diaphragms via the connecting points on the domes. The inner connecting rods respectively connected to the two sets of diaphragms are connected one to another via different outer connecting rods. Cavities of the speaker are formed between adjacent diaphragms. Cavities spaced apart from each other jointly form a front acoustic cavity. The cavities adjacent to the front acoustic cavity form a rear acoustic cavity. The cavity sealing housing seals the front acoustic cavity/rear acoustic cavity, thus allowing separation of the front and rear acoustic cavities of the speaker.

Speaker

A flat plate bass loudspeaker comprising a flat plate diaphragm, at least three driving units and a housing. The driving unit comprises a voice coil unit and a magnetic circuit unit; the voice coil units are dispersedly coupled to one side of the diaphragm near the housing; mounting holes for accommodating and fixing the magnetic circuit units, and voice outlet holes penetrating through the housing are arranged on the housing; the number and position of the mounting holes are corresponding to those of voice coils attached to the spherical top of the diaphragm; and ratio of the total area of the voice outlet holes to the orthographic projection area of the diaphragm on the housing is in a range less than 0.9. The flat plate bass loudspeaker provided by the present invention can avoid the problems occurred in thick and heavy voice coils and excessive magnet performance.

Flat plate-type bass loudspeaker

A tablet woofer and an electronic device using same. The woofer comprises a vibrating diaphragm, at least four mutually independent drive units, and a housing. The vibrating diaphragm is a rectangle shape, and comprises a rigid arc portion at the central position and a spiral curve portion at the periphery; the drive unit comprises a voice coil unit and a corresponding magnetic circuit unit, and four angles of the arc portion of the vibrating diaphragm are each combined with one voice coil unit; the housing is provided with mounting holes for accommodating and mounting the drive units, and sound holes penetrating through the mounting plane; the spiral curve portion of the vibrating diaphragm is fixedly connected to the periphery of the upper side of the housing.

The present invention provides a tablet woofer, including: a vibration diaphragm, at least four mutually independent driving units, and a housing for accommodating and securing the vibration diaphragm and the driving unit. The driving unit includes independent voice coil units and magnetic circuit units, the voice coil units being attached and fixed to the vibration diaphragm. The woofer further includes a FPCB communicating with an internal circuit and an external circuit, and the FPCB is disposed at two sides of the housing, the part of the FPCB disposed on the side of the housing close to the voice coil units being electrically connected to the voice coil units, the part of the FPCB disposed on the side of the housing far away from the voice coil units being electrically connected to the external circuit. The woofer can solve the problems of thick and heavy voice coils and magnet performance surplus.

Tablet woofer

A double-diaphragm loudspeaker module comprises: a housing providing with a first sound hole and a second sound hole; a supporting structure fixed on an inner wall of the housing; and a loudspeaker unit comprising a first diaphragm, a sound coil, a magnetic circuit system and a second diaphragm. The sound coil and the magnetic circuit system are separately combined with the first diaphragm and the second diaphragm. The housing, the supporting structure and the loudspeaker unit form a first front sound cavity, a second front sound cavity, and a rear sound cavity. The first front sound cavity comprises a space between the first diaphragm and the housing. The second front sound cavity comprises a space between the second diaphragm and the housing. The rear sound cavity comprises a space between the first diaphragm and the second diaphragm.

Double-vibrating-diaphragm loudspeaker module

An electroacoustic transducer comprises flexible strips and a shell, wherein the shell is formed of a first sub shell which is fixedly bonded to a second sub shell, the first sub shell is provided with a bonding surface for being bonded to the second sub shell, the flexible strip is bent to form a bent portion at the bonding surface; the second sub shell is provided with a dodging structure for dodging the bent portion. Its manufacturing method comprises: performing injection molding on the first sub shell from the bonding portions of the elastic strips; performing injection molding on the second sub shell; fixedly bonding the first sub shell with the second sub shell, wherein the flexible strip is bent to form the bent portion from the bonding surface at the end part of the first sub shell.

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Weifang, China

Chao Jiang