CN108881523B

CN108881523B - Electronic display device and electronic device

Info

Publication number: CN108881523B
Application number: CN201810403639.2A
Authority: CN
Inventors: 祖峰磊; 杨鑫峰
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2018-04-28
Filing date: 2018-04-28
Publication date: 2020-10-16
Anticipated expiration: 2038-04-28
Also published as: CN108881523A

Abstract

The invention discloses an electronic display device and an electronic device. The electronic display device comprises a shell, a screen and a vibrating device, wherein at least one part of the screen is connected with at least one part of the shell through a flexible connecting device, the flexible connecting device has elasticity, the vibrating device is fixed on the screen, and the vibrating device is configured to respond to an electric signal of an external circuit to generate vibration and drive the screen to vibrate and generate sound. In an embodiment of the invention, the screen and the housing are connected by a flexible connection means, rather than a fixed connection. Therefore, the screen can not drive the shell to vibrate together when vibrating, and the sound leakage caused by the vibration of the shell is effectively reduced.

Description

Electronic display device and electronic device

Technical Field

The present invention relates to the field of electroacoustic conversion technologies, and in particular, to an electronic display device and an electronic device using the same.

Background

Electronic terminals with full-screen are more and more popular with people. In order to improve the screen ratio, the front of the electronic terminal needs to be designed without holes, i.e. hole-shaped structures such as a sound outlet of a receiver and a light sensing hole of a camera are eliminated. In some sound generating device designs, a piezoelectric device is placed on a middle frame, and the screen and the rear shell of the electronic terminal are driven to vibrate through the vibration of the piezoelectric device, so that sound is radiated.

However, in this solution, since the screen is fixedly connected to the rear shell, the piezoelectric device may drive the rear shell to vibrate in addition to the screen, which may cause sound leakage during a call.

In addition, in this scheme, the piezoelectric device mainly drives the screen itself to make sound bending so as to vibrate. The screen needs to overcome larger resistance when being bent, so that the energy conversion efficiency of the sound generating device is not high.

Disclosure of Invention

An object of the present invention is to provide a new solution for an electronic display device.

According to a first aspect of the invention, an electronic display device is provided. The equipment comprises a shell, a screen and a vibrating device, wherein at least one part of the screen is connected with at least one part of the shell through a flexible connecting device, the flexible connecting device has elasticity, a vibrating space is formed between the screen and the shell, the vibrating device is fixed on the screen, and the vibrating device is configured to respond to an electric signal of an external circuit to generate vibration and drive the screen to vibrate and generate sound.

Optionally, the screen and the housing are arranged up and down, and the flexible connecting device is fixed between the upper end face of the side wall of the housing and the inner side part of the edge of the screen.

Optionally, the casing still includes the center that is located the inboard of lateral wall, the center is platelike structure, the outward flange of center with the lateral wall is connected, vibrating device is fixed being close to of screen one side of casing, and with the center is relative, the center is offered and is used for dodging vibrating device's dodge hole.

Optionally, the flexible connecting means is fixed to the middle frame, or a part of the flexible connecting means is fixed to the middle frame and another part is fixed to the side wall.

Optionally, a part of the screen is fixedly connected with a part of the housing.

Optionally, the vibration device further comprises a first elastic connecting piece, and the first elastic connecting piece is used for connecting the vibration device and the middle frame.

Optionally, the first elastic connecting piece surrounds the vibration device, and one end of the first elastic connecting piece is connected with the vibration device, and the other end of the first elastic connecting piece is connected with the hole wall of the avoidance hole.

Optionally, the flexible connecting device is made of rubber or silica gel.

Optionally, the flexible connection means comprises at least one of a spring and a leaf spring.

Optionally, the vibration device is an electromagnetic exciter, the electromagnetic exciter includes a stator system and a vibrator system, the stator system is configured to form a magnetic field, the vibrator system includes a coil, a second elastic connector and a weight block, one end of the coil is fixedly connected with the weight block, the other end of the coil is inserted into the magnetic field, the coil and the weight block are suspended above the stator system through the second elastic connector, and the coil is conducted with an external circuit.

Optionally, the stator system is attached to the screen by an adhesive.

According to another aspect of the present invention, an electronic device is provided. The device comprises the electronic display device provided by the invention.

In an embodiment of the invention, the screen is connected to the housing by a flexible connection means. Therefore, the screen can not drive the shell to vibrate together when vibrating, and the sound leakage caused by the vibration of the shell is effectively reduced.

In addition, since the housing does not vibrate, more energy is used to drive the vibration of the screen, thereby improving the electro-acoustic transduction efficiency of the electronic display device.

In addition, the flexible connection mode enables the screen to integrally generate vibration sound relative to the shell, and the screen is not locally deformed to generate vibration sound. The force which needs to be overcome by the vibration is greatly reduced, the energy conversion efficiency of the electronic display device is effectively improved, the amplitude of the screen can be obviously improved, and the sound production effect is more excellent.

In addition, since the vibration device drives the screen to vibrate as a whole, the position of the vibration device on the screen has little influence on the sound production effect, and the requirements for the mounting accuracy of the vibration device and the appearance of the screen are reduced. Especially at medium and low frequencies, the screen can vibrate up and down as a whole, so that the radiation area is greatly increased.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a cross-sectional view of an electronic display device according to one embodiment of the invention.

Fig. 2 is a schematic structural diagram of an electromagnetic actuator according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view of another electronic display device in accordance with an embodiment of the present invention.

Fig. 4 is a cross-sectional view of yet another electronic display device in accordance with an embodiment of the invention.

Description of reference numerals:

11: a flexible connection means; 12: a side wall; 13: a screen; 14: an electromagnetic exciter; 15: a middle frame; 16: a bottom wall; 17: avoiding holes; 18: a vibration space; 19: a vibrator system; 20: a stator system; 21: a first elastic connecting member; 22: a second elastic connecting piece.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

According to one embodiment of the present invention, an electronic display device is provided. As shown in fig. 1 and 3, the electronic display device includes a housing, a screen 13, and a vibration means.

Specifically, the housing includes a cylindrical side wall 12 and a bottom wall 16 fixed to one end of the side wall 12. The interior of the housing has a receiving cavity. The accommodating cavity is used for accommodating various electronic devices. The screen 13 is disposed at an end of the side wall 12 opposite the bottom wall 16. At least a portion of the screen 13 is connected to at least a portion of the housing by a flexible connection 11. The flexible attachment means 11 is resilient to enable the screen 13 and the housing to be attached together and to allow the screen 13 to vibrate relative to the housing without the vibrations being transmitted to the housing.

The flexible connecting means 11 may be made of a flexible material. The attachment is made by means of an adhesive. For example, the flexible connecting device 11 is made of rubber or silicone. The flexible connection means 11 may be a unitary ring-shaped structure, surrounding the edge of the screen 13;

the flexible connecting device 11 may be a plurality of block-shaped or strip-shaped structures, and is uniformly arranged at the edge of the screen 13;

the flexible material can be made into a set shape according to actual requirements, the machinability is good, and the flexible connecting device 11 is processed to be simple in structure, small in size and good in applicability.

The flexible connection means 11 may also be a glue for bonding the screen to the housing and having elasticity after curing. For example 1503/PC plastic glue; 1502/PP plastic glue; 1501/PE plastic glue; 1505/ABS plastic cement; 1509 acrylic glue; 1507/PS plastic glue; 1207 no whitening flash glue; 1508 t/silicone no-treatment glue; 1206/silica gel sticking plastic glue; 1508 silicon adhesive metal glue; 1208 metal super glue, etc. The skilled person can select the desired one according to the actual need.

The flexible connection means 11 may also be an elastic structure. For example, the flexible connection means 11 comprises at least one of a spring and a leaf spring. A plurality of springs and/or clips are evenly disposed around the screen 13. For example, the resilient structural member may be connected to the housing by snapping, bonding, or insert molding. The elastic structural member has high structural strength, a plurality of selectable types and good durability.

It is also possible that a part of the screen 13 is connected to a part of the housing by a flexible connection means, and a part of the screen 13 is fixedly connected to a part of the housing. At the time of vibration, the screen 13 vibrates with the fixedly attached portion as an axis. The flexible connection means allows the screen 13 to vibrate as a whole and is connected in such a manner that the vibration is not transmitted to the housing.

For example, the screen 13 has a polygonal shape. The shape of the housing corresponds to the shape of the screen 13. One edge of the screen 13 is fixedly connected with one edge of the shell, and the other edges of the screen 13 are connected with the other edges of the shell through flexible connecting devices; or parts of the remaining edges are connected by flexible connection means.

For example, the screen 13 has a circular shape. The shape of the housing corresponds to the shape of the screen 13. The edge of the screen 13 with a part of radian is fixedly connected with the shell, and the edge of the other part of radian is connected with the shell through a flexible connecting device.

Of course, the flexible connection device 11 is not limited to the above-mentioned embodiments, and those skilled in the art can arrange the flexible connection device according to actual needs.

The screen 13 is a liquid crystal screen. For example, liquid crystal screens such as LCD, LED or OLED. The surface shape, thickness and the like of the liquid crystal screen can be set according to actual needs by those skilled in the art.

A vibration space 18 is formed between the screen 13 and the housing. The vibrating device is fixed to the screen 13. The vibration device is fixed to the inner and outer surfaces of the screen 13 by, for example, an adhesive. The vibration device is configured to vibrate in response to an electrical signal of an external circuit and to vibrate and sound the screen 13.

The vibration device is, for example, a piezoelectric vibrator. The piezoelectric vibrator includes a support portion, a cantilever portion disposed on the support portion, and a mass fixed on the cantilever portion. The support is fixedly connected to the screen 13. For example, by means of an adhesive. The support parts form a stator system 20. The cantilever part and the mass form a vibrator system 19. The cantilever part is made of piezoelectric material. The cantilever portion is deformed in response to an electric signal of an external circuit to perform up and down vibration. The mass can increase the inertia of the vibration, thereby improving the amplitude. Since the vibrator system 19 is connected to the stator system 20, the vibration of the vibrator system 19 drives the stator system 20 to vibrate. The stator system 20 is fixedly connected with the screen 13, so as to drive the screen 13 to vibrate and sound.

In an embodiment of the invention, the screen 13 is connected to at least a portion of the housing by a flexible connection means 11. Therefore, the screen 13 does not drive the shell to vibrate together when vibrating, and the sound leakage caused by the vibration of the shell is effectively reduced.

In addition, since the case does not vibrate, more energy is used to drive the vibration of the screen 13, thereby improving the electro-acoustic transduction efficiency of the electronic display device.

In addition, the flexible connection mode enables the screen 13 to vibrate and sound relative to the shell integrally, and the screen 13 is not locally deformed to cause vibration and sound. This greatly reduces the force that the vibration needs to overcome, effectively improves the transduction efficiency of the electronic display device, and the amplitude of the screen 13 can be significantly improved, with a more excellent sound production effect.

Further, since the vibration device drives the screen 13 to vibrate as a whole, the position of the vibration device on the screen 13 has little influence on the sound emission effect, and the requirements for the mounting accuracy of the vibration device and the appearance of the screen 13 are reduced. Especially at medium and low frequencies, the screen 13 can vibrate up and down as a whole, thereby greatly increasing the radiation area.

In the case of a device which vibrates to produce sound mainly by the deformation of the screen 13, the screen 13 needs to be nearly square or circular in order to achieve a good vibration effect, and the vibration device needs to be fixed at the geometric center of the screen 13 to prevent the occurrence of polarization.

In one example, as shown in fig. 1 and 3, the screen 13 and the housing are arranged up and down. The screen is positioned above the shell. Preferably, the orthographic projections of the two substantially coincide. The flexible connection means 11 is fixed between the side wall 12 of the housing and the screen 13. For example, the flexible connection means 11 are arranged between an inner part of the edge of the screen 13 and the upper end face of the side wall 12. In this way, the pulling or compressing force applied to the flexible connecting means 11 is parallel to the direction of vibration and no force perpendicular to the direction of vibration is generated. Thus, the generation of polarization can be effectively prevented, and the flexible connection device 11 is not easily separated from the screen 13 or the housing, and the reliability is good.

In one example, as shown in fig. 1 and 3, the housing further includes a center frame 15 located inside the side wall 12. The middle frame 15 has a plate-like structure. The center frame 15 provides a place for mounting various components. The outer edge of the middle frame 15 is connected to the side wall 12 of the housing. For example by snapping, gluing or welding.

Preferably, the housing is integrally injection molded. This effectively improves the coupling strength of the middle frame 15 to the side wall 12 and simplifies the manufacturing process.

The vibrating device is fixed to a side of the screen 13 close to the housing, and is opposed to the middle frame 15. Thus, the vibration device does not occupy a space outside the screen 13, so that the appearance of the screen 13 is good. As shown in fig. 3, the center frame 15 is opened with an avoidance hole 17 for avoiding the vibration device. At the time of assembly, the vibration device is disposed at a position of the screen 13 corresponding to the escape hole 17. The avoiding hole 17 is a through hole or a counter hole. The vibration device is inserted into the escape hole 17. Thus, the middle frame 15 does not interfere with the vibration device.

In addition, this way enables the thickness of the electronic display device to be effectively reduced.

In one example, as shown in FIG. 4, the flexible attachment means is secured to the center frame 15. For example, the upper end of the flexible connecting device is fixedly connected with the screen 13, and the lower end is fixedly connected with the middle frame 15.

Alternatively, as shown in fig. 4, the flexible connection means may be fixed in one part to the middle frame 15 and in another part to the side wall 12 of the housing. For example, the upper end of the flexible connection means is fixedly connected to the screen 13, a portion of the lower end is fixed to the middle frame 15, and another portion is fixed to the side wall 12 of the housing.

The arrangement of the middle frame 15 provides an installation space for the arrangement of the flexible connection means, and is not limited to fixing the flexible connection means directly to the side wall 12 of the housing. This makes the mounting of the flexible connection means easy.

In one example, as shown in fig. 1 and 3, the electronic display device further includes a first elastic connection member 21. The first elastic connecting member 21 is used to connect the vibration device to the middle frame 15.

For example, the first elastic connecting member 21 is a spring, a spring plate, an elastic rubber member, or an elastic silicone member.

The first elastic connecting piece 21 can provide auxiliary suspension for the vibration device, so that the mutual pulling force between the vibration device and the screen 13 is dispersed during vibration, the vibration device and the screen 13 are not easy to separate, and the reliability of the electronic display device is improved.

In addition, the first elastic connecting piece 21 enables the vibrating device not to impact the middle frame 15 when the electronic display device falls, and improves the durability of the device.

In addition, the auxiliary suspension can prevent the vibration device from polarizing.

Preferably, the first elastic connector 21 is disposed around the vibration device, and has one end connected to the vibration device and the other end connected to the hole wall of the avoidance hole 17. For example, the first elastic connecting member 21 is an integral annular structure, and the inner ring is fixedly bonded with the vibrating device; the outer ring is bonded and fixed with the hole wall of the avoidance hole 17.

It is also possible that the first elastic connections 21 are provided in plurality and evenly distributed around the vibration device. One end of each first elastic connecting piece 21 is fixedly bonded with the vibration device, and the other end is fixedly bonded with the hole wall of the avoidance hole 17.

In this example, the first elastic connecting member 21 does not occupy a space parallel to the vibration direction, facilitating a slim and compact design of the electronic display device.

In one example, as shown in FIG. 2, the vibration device is an electromagnetic actuator 14. The electromagnetic actuator 14 vibrates using the principle of electromagnetic induction. The electromagnetic exciter 14 comprises a stator system 20 and a vibrator system 19. The stator system 20 is configured for forming a magnetic field. For example, the stator system 20 includes a permanent magnet and a magnetic conductive plate fixedly connected to the permanent magnet. The stator system 20 is bonded to the screen 13 by an adhesive. Permanent magnets are used to form a magnetic field. The magnetic conduction plate is used for gathering magnetic induction lines, so that the magnetic induction intensity of a magnetic field is improved.

The vibrator system 19 comprises a coil, a second elastic connector 22 and a weight. One end of the coil is fixedly connected with the balancing weight, and the other end of the coil is inserted into the magnetic field. The coil and the counterweight are suspended above the stator system 20 by a second elastic connection 22. The second elastic connection 22 serves as a suspension. For example, the second elastic connecting member 22 is a spring, a spring plate, an elastic rubber member, an elastic silicone member, or the like. The second elastic connecting member 22 is fixedly connected with the counterweight. The coil is in conduction with an external circuit.

The coil vibrates under the action of a magnetic field force in response to an electrical signal of an external circuit. The coil drives the counterweight to vibrate, so that the vibrator system 19 vibrates. Similarly, since the vibrator system 19 is connected to the stator system 20, the vibration of the vibrator system 19 drives the stator system 20 to vibrate. The stator system 20 is fixedly connected with the screen 13, so as to drive the screen 13 to vibrate and sound.

The cantilever of the piezoelectric vibrator is not suitable for large-amplitude vibration due to the characteristic that the cantilever is easy to crack and break, so that the low-frequency performance of the electronic display device is limited, and the reliability is low. The electromagnetic exciter 14 adopts an electromagnetic induction vibration mode, so that the structural stability is high, the amplitude is large, and the reliability is high.

Of course, the vibration device is not limited to the above-mentioned embodiments, and those skilled in the art can set the vibration device according to actual needs.

According to another embodiment of the present invention, an electronic device is provided. The electronic equipment comprises the electronic display equipment provided by the invention. The electronic equipment is a mobile phone, a tablet computer, a notebook computer, a game machine, VR equipment and AR equipment. The electronic display device can be used as a receiver or a loudspeaker.

The electronic equipment has the characteristics of higher screen occupation ratio and good sound production effect.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. An electronic display device, comprising a housing, a screen, and a vibrating device, wherein at least a portion of the screen is connected to at least a portion of the housing via a flexible connecting device, the flexible connecting device has elasticity, the vibrating device is fixed on the screen, and the vibrating device is configured to vibrate in response to an electrical signal of an external circuit and drive the screen to vibrate and generate sound;

the shell further comprises a middle frame positioned on the inner side of the side wall, the middle frame is of a plate-shaped structure, the outer edge of the middle frame is connected with the side wall, the vibrating device is fixed on one side, close to the shell, of the screen and opposite to the middle frame, and an avoiding hole used for avoiding the vibrating device is formed in the middle frame;

the vibrating device further comprises a first elastic connecting piece, and the first elastic connecting piece is used for connecting the vibrating device with the middle frame.

2. The electronic display device according to claim 1, wherein the screen and the housing are arranged up and down, and the flexible connecting means is fixed between an upper end surface of a side wall of the housing and an inner portion of an edge of the screen.

3. Electronic display device according to claim 1, characterised in that the flexible connection means are fixed to the middle frame, or

One part of the flexible connecting device is fixed on the middle frame, and the other part of the flexible connecting device is fixed on the side wall.

4. The electronic display device of claim 1, wherein a portion of the screen is fixedly coupled to a portion of the housing.

5. The electronic display device of claim 1, wherein the first elastic connector is disposed around the vibration device, and has one end connected to the vibration device and the other end connected to a wall of the avoiding hole.

6. The electronic display device according to any one of claims 1 to 5, wherein the flexible connecting means is made of rubber or silicone.

7. The electronic display device of any of claims 1-5, wherein the flexible connection comprises at least one of a spring and a leaf spring.

8. The electronic display device according to any one of claims 1-5, wherein the vibration means is an electromagnetic actuator comprising a stator system configured to form a magnetic field and a vibrator system comprising a coil, a second elastic connector and a weight, one end of the coil being fixedly connected to the weight and the other end being inserted into the magnetic field, the coil and the weight being suspended above the stator system by the second elastic connector, the coil being in electrical communication with an external circuit.

9. An electronic device, characterized in that it comprises an electronic display device according to any one of claims 1-8.