CN109032257B

CN109032257B - Electronic display device and electronic device

Info

Publication number: CN109032257B
Application number: CN201810909162.5A
Authority: CN
Inventors: 刘博文
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2021-06-11
Anticipated expiration: 2038-08-10
Also published as: CN109032257A

Abstract

The invention discloses an electronic display device and an electronic device, wherein the electronic display device comprises a shell, a screen and a vibration device, at least one part of the screen is connected with at least one part of the shell through a flexible connection device, at least one of the screen and the shell is provided with a containing groove for fixing the flexible connection device, the flexible connection device has elasticity, the vibration device comprises a stator system and a vibrator system which are matched with each other, the stator system is fixedly connected with the screen through a heat insulation device, the vibrator system responds to an electric signal of an external circuit to generate vibration and drives the stator to vibrate, and the stator drives the screen to vibrate and generate sound. The screen passes through the flexible mounting with the casing and is connected, rather than fixed connection, can not drive the casing during screen vibration and vibrate together, has effectively reduced because casing vibration and the sound leakage that causes, through setting up the flexible connection device holding tank, strengthens the joint strength of flexible connection device and casing, screen, and heat-proof device reduces the heat of vibrating device and spreads to the screen, effectively protects the screen.

Description

Electronic display device and electronic device

Technical Field

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

Background

Electronic terminals in a full-screen mode are more and more popular with people, and in order to improve screen occupation ratio, the front of the electronic terminal needs to be designed without holes, namely hole-shaped structures such as voice control of a receiver and photosensitive holes of a camera are eliminated. In some sound generating device design schemes, 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 the radiation sound is realized.

Then, in the scheme, because the screen is fixedly connected with the rear shell, the piezoelectric device drives the screen to vibrate and also drives the rear shell to vibrate, which can cause sound leakage during conversation;

the screen of the existing electronic equipment is large in size and needs large driving force, so that the vibration device generates heat greatly, and the performance of the screen is seriously influenced by heat conduction to the screen.

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

The technical task of the invention is to solve the defects of the prior art and provide a new technical scheme of the electronic display device.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an electronic display equipment, includes casing, screen and vibrating device, at least some of screen pass through flexible connection device with at least some of casing is connected, the screen with at least one side is equipped with and is used for fixing in the casing flexible connection device's holding tank, flexible connection device has elasticity, vibrating device is including the stator system and the vibration system of mutually supporting, the stator system pass through heat-proof device with screen fixed connection, the vibrator system responds external circuit's the signal of telecommunication and produces the vibration to drive the stator vibration, the stator drives the screen vibration sound production.

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

Preferably, the casing includes the lateral wall and is located the middle frame of the inboard of lateral wall, the middle frame is platelike structure, the outward flange of middle frame with the lateral wall is connected, vibrating device is fixed being close to of screen one side of casing, and with the middle frame is relative, the middle frame is offered and is used for dodging vibrating device dodges the hole.

Preferably, one part of the flexible connecting device is fixed on the middle frame, the other part of the flexible connecting device is fixed on the side wall, accommodating grooves are formed in the middle frame and the side wall, and the two accommodating grooves are communicated.

Preferably, the screen is provided with a containing groove for fixing the flexible connecting device.

Preferably, 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.

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

Preferably, the cross section of the accommodating groove is trapezoidal or arc.

The invention has the technical effects that:

compared with the prior art, the technical scheme at least has the following technical effects that the screen is connected with at least one part of the shell through the flexible connecting device, and the shell cannot be driven to vibrate together when the screen vibrates, so that the sound leakage caused by the vibration of the shell is effectively reduced.

Secondly, through set up heat-proof device between vibrating device and screen, avoid too much heat transfer to the screen and influence the screen performance.

Thirdly, 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 the invention, the flexible connection mode enables the screen to vibrate and sound relative to the whole shell, but not the screen is locally deformed to cause vibration and 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 better.

In the invention, at least one of the screen and the shell is provided with the containing groove for fixing the flexible connecting device, so that the connecting strength of the flexible connecting device and the screen and/or the shell is enhanced, the flexible connecting device is prevented from being separated from the screen and the shell due to long-term mechanical fatigue, the sounding stability of the screen is enhanced, the service life of the screen is prolonged, in addition, the thickness of the electronic display equipment can be effectively reduced by the mode, and the thinning of the electronic display equipment is facilitated.

Since the vibration device drives the screen to vibrate integrally, the influence of the position of the vibration device on the screen on the sound production effect is small, and the requirements on the installation precision 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.

Drawings

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

FIG. 2 is a cross-sectional view of another electronic display device in accordance with one embodiment of the present invention;

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

Description of reference numerals:

10: accommodating groove, 11: flexible connection device, 12: side wall, 13: screen, 14: vibration device, 15: middle frame, 16: bottom wall, 17: relief hole, 18: vibration space, 19: heat insulation device, 21: a first resilient connecting member.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In one embodiment of the present invention, an electronic display device is provided. As shown in fig. 1 and 2, the electronic display device includes a housing, a screen 13, and a vibration device 14.

Specifically, the housing includes a cylindrical side wall 12 and a bottom wall 16 fixed to one end of the side wall 12. The inside of the housing has a receiving chamber for receiving various electronic devices. The screen 13 is disposed at an end of the side wall 12 opposite the bottom wall 16. A vibration space 18 is formed between the screen 13 and the housing, and the vibration device 14 is fixed to the screen 13 by a heat insulating device 19.

Specifically, the vibration device 14 comprises a vibrator system and a stator system which are matched with each other, the stator system is fixedly connected with the screen 13 through a heat insulation device 19, the heat insulation device 19 has a heat insulation function and can prevent heat generated by the vibration device from being conducted to the screen 13, and the stator system can be directly or indirectly connected with the heat insulation device 19. For example, the stator system is connected to the heat shield 19 by means of an adhesive, and the heat shield 19 is connected to the screen 13 by means of an adhesive. Alternatively, the stator system may be fixed in a housing, which is connected to the heat shield 19 by means of an adhesive, the heat shield 19 in turn being connected to the screen 13.

The vibrator system responds to an electric signal of an external circuit to generate vibration and drives the stator system to vibrate, and the stator system drives the screen to vibrate and sound. At least a part of the screen 13 is connected with at least a part of the housing by a flexible connecting means 11, at least one of the screen 13 and the housing is provided with a receiving groove 10 for fixing the flexible connecting means 11, the flexible connecting means 11 has elasticity so that the screen 13 and the housing can be connected together and the screen 13 can be allowed to vibrate relative to the housing without being transmitted to the housing.

In the invention, the screen 13 is connected with at least one part of the shell through the flexible connecting device 11, and the screen 13 can not drive the shell to vibrate together when vibrating, thereby effectively reducing the sound leakage caused by the vibration of the shell. Since the housing 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 the present invention, by providing the heat insulating means 19 between the vibration means 14 and the screen 13, it is prevented that excessive heat is transferred to the screen to affect the screen performance.

In the invention, the flexible connection mode enables the screen 13 to vibrate and sound relative to the whole shell, but 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, and the sound production effect is more excellent.

In the invention, at least one of the screen and the shell is provided with the containing groove for fixing the flexible connecting device, so that the connecting strength of the flexible connecting device and the screen and/or the shell is enhanced, the flexible connecting device is prevented from being separated from the screen and the shell due to long-term mechanical fatigue, the sounding stability of the screen is enhanced, the service life of the screen is prolonged, and in addition, the thickness of the electronic display equipment can be effectively reduced by the mode.

Optionally, the material of the heat insulation device 19 is asbestos or plastic, and specifically, the heat insulation device 19 may be polyurethane foam or foam.

Optionally, the heat insulation device 19 is formed by compounding a single layer of heat insulation material or multiple layers of heat insulation materials.

Preferably, the interior of the thermal insulation means 19 forms at least one cavity capable of accommodating the cavity, thereby increasing the thermal insulation effect of the thermal insulation means 19. For example, the heat insulation device 19 may have a block structure or a sheet structure, and the cavity may be a recess formed by recessing the surface of the heat insulation device 19, or may be a closed cavity inside the heat insulation device 19, or may be a cavity of the heat insulation device 19 made of a porous material.

When the heat insulation device 19 is formed by compounding multiple layers of heat insulation materials, a hollow structure or a dust groove can be formed in the middle layer heat insulation material, and the outer layer heat insulation materials on the two sides of the middle layer are covered on the middle layer heat insulation material to form a cavity. Or the surface of the outer layer heat-insulating material is hollowed or sunk, the middle layer heat-insulating material can be hollowed or sunk or not, and the middle layer heat-insulating material and the outer layer heat-insulating material are compounded together to form a cavity. The controllability of the shape and size of the cavity is high, making the design of the insulation device easier.

In one embodiment, the heat insulation device further comprises a heat conduction device, the heat conduction device comprises a heat collection portion and a heat conduction portion connected with the heat collection portion, the heat collection portion is connected with the heat insulation device, and the heat conduction portion is connected with an external component so as to timely dissipate heat generated by the vibration device and heat on the heat insulation device and guarantee the heat insulation effect.

Specifically, the heat collecting part is of a net structure, is embedded into the heat insulation device or is positioned on the surface of the heat insulation device, or is of a sheet structure, is attached to the heat insulation device, and can be a copper net or a copper sheet.

In another embodiment, the device further comprises a temperature sensing device and a processing device, wherein the temperature sensing device is fixedly connected with at least one of the screen, the vibration device or the heat insulation device, and the sensing device is configured to be used for monitoring the temperature of the device in real time; the processing device is connected with the vibration device, the processing device controls the vibration state of the vibration device according to the temperature value detected by the temperature sensing device, and when the temperature sensed by the temperature sensing device exceeds a set threshold value, the processing device sends a control signal to the vibration device so as to reduce the vibration intensity of the vibration device or control the vibration device to stop vibrating to protect a screen.

Specifically, the cross section of the accommodating groove 10 perpendicular to the extending direction thereof is a regular pattern structure such as a trapezoid, an arc or a rectangle, and of course, an irregular pattern structure may be adopted.

The flexible connecting means 11 may be of flexible material. The connection is made by an adhesive, for example, the flexible connecting means 11 is made of rubber or silicone. The flexible connecting means 11 may be a unitary ring-shaped structure surrounding the edge of the screen 13, and at least one of the end surfaces of the edge of the screen 13 opposite to the housing is provided with a ring-shaped accommodating groove 10 for fixing the flexible connecting means 11.

Of course, the flexible connecting means 11 may be a plurality of blocks or strips and arranged uniformly at the edge of the screen 13.

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

The flexible connection means 11 may also be a spring or a leaf spring and is a glue for bonding the screen and the housing and having elasticity after curing. For example 1503/PC plastic glue, 1502/PP plastic glue, 1501/PE plastic glue, 1505/ABS plastic glue, 1207 no-whitening flash glue; 1508 t/silicone no-treatment glue, 1206/silicone adhesive plastic glue, 1508 silicone adhesive metal glue, etc. The skilled person can select from the existing glues according to the actual needs.

It is also possible that a part of the screen 13 is connected to a part of the housing by the flexible connection means 11, and a part of the screen 13 is fixedly connected to a part of the housing. The screen 13 vibrates with the fixedly connected portion as an axis when vibrating, the flexible connection means allows the screen 13 to vibrate as a whole, and the flexible connection means is in such a manner that the vibration is not transmitted to the housing.

For example, the screen 13 is polygonal, and 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 is circular, the shape of the housing corresponds to the shape of the screen 13, the partially curved side of the screen 13 is fixedly connected with the housing, and the partially curved side is connected with the housing through a flexible connecting device.

The above is only a partial embodiment of the flexible connection device 11, and those skilled in the art can make the arrangement according to actual needs.

The screen 13 is a liquid crystal screen, such as a liquid crystal screen of 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, and the vibration device 14 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 14 is configured to vibrate in response to an electrical signal of an external circuit and vibrate and sound the screen 13. Specifically, the vibration device 14 may be a linear vibration motor or a piezoelectric vibration motor.

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 production 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 conventional device that vibrates and sounds mainly depending on 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 embodiment, as shown in fig. 1 and 2, 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 are fixed between the receiving groove 10 of the upper end face of the side wall 12 of the housing and the inner part of the edge of the screen. In this way, the pulling or compressing force applied to the flexible connecting means 11 is parallel to the vibration direction, and no force perpendicular to the vibration direction is generated. The polarization can be effectively prevented, and the flexible connecting device 11 is not easy to separate from the screen 13 or the shell, so that the reliability is good.

In one embodiment, as shown in fig. 1 and 2, 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.

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 the outside space of the screen 13, so that the appearance of the screen 13 is good. As shown in fig. 3, the middle frame 15 is opened with an escape hole 17 for escaping the vibration device, and the vibration device is disposed at a position of the screen 13 corresponding to the escape hole 17 when assembled. 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, the thickness of the electronic display device can be effectively reduced in such a way.

In one embodiment, as shown in fig. 3, the middle frame and the side walls of the housing are formed separately, which has an advantage of facilitating installation of various components in the accommodating cavity and an disadvantage of reducing the connection stability of the middle frame and the side walls. In order to enhance the connection stability of the middle frame and the side wall, one part of the flexible connecting device 11 is fixed on the middle frame 15, the other part is fixed on the side wall 12, the middle frame 15 and the side wall 12 are both provided with accommodating grooves 10, and the two accommodating grooves 10 on the middle frame 15 and the side wall 12 are communicated with each other, which are shown by the broken lines in fig. 3.

Of course, the middle frame and the side wall of the shell can also be integrally formed.

In one embodiment, besides the accommodating groove 10 for fixing the flexible connecting device 11 is provided on the housing, the accommodating groove 10 for fixing the flexible connecting device 11 is also provided on the screen, and the positions of the accommodating groove 10 provided on the screen and the housing may be set corresponding to each other or may be staggered.

In one embodiment, as shown in fig. 1 and 2, the electronic display device further includes a first elastic connection member 21, and the first elastic connection member 21 is used for connecting the vibration device and the middle frame 15. Specifically, the first elastic connecting member may be a spring, a resilient sheet, an elastic rubber member, an elastic silicone member, or the like, and preferably, the first elastic connecting member is made of a material with good heat dissipation, such as copper.

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 connecting member 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 avoiding hole 17. For example, the first elastic connecting member 21 is integrally formed in a ring structure, the inner ring is fixedly bonded to the vibration device, and the outer ring is fixedly bonded to the hole wall of the avoiding hole 17.

Of course, the first elastic connecting members 21 may be provided in plurality and uniformly distributed around the vibration device, one end of each first elastic connecting member is fixedly bonded to the vibration device, and the other end of each first elastic connecting member is fixedly bonded to the hole wall of the avoiding hole 17.

In this example, the first elastic connecting member 21 does not occupy a space parallel to the vibration direction, which facilitates the electronic display device to be light, thin and compact.

The vibrating device can be a linear vibrating device or a piezoelectric vibrating device, for example, a linear motor disclosed in patent CN207069863U, the stator system comprises a permanent magnet and a motor shell, the permanent magnet is fixed on the motor shell, the motor shell is fixed on the heat insulation device, the vibrator system comprises a mass block, a coil and an elastic support piece, the mass block is suspended in the motor shell through the elastic support piece, the vibrator system vibrates due to the electromagnetic driving force between the coil and the permanent magnet after the coil is electrified, the vibrator system drives the stator system to vibrate, and the stator system drives the screen to vibrate and sound; or patent CN101488697A discloses a linear vibrating device, stator system includes motor casing and coil, and the coil is fixed in on the motor casing, and the motor casing is fixed on heat-proof device, and oscillator system includes quality piece, permanent magnet and elastic support piece, and the permanent magnet is embedded in the quality piece, and the quality piece passes through elastic support piece suspension in motor housing, and when the coil circular telegram, produce electromagnetic force between coil and the permanent magnet, the drive oscillator vibration, oscillator system drive stator system vibration, and stator system drives the screen vibration and sends out.

In 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 shielding computer, a notebook computer, a game machine, VR equipment and AR equipment. The electronic display device can be used as a receiver or an external loudspeaker. The electronic equipment has the characteristics of higher screen occupation ratio and good sound production effect.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are included in the scope of the present invention.

Claims

1. An electronic display device is characterized by comprising 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, at least one of the screen and the shell is provided with a containing groove for fixing the flexible connecting device, the flexible connecting device has elasticity, the vibrating device comprises a stator system and a vibrator system which are matched with each other, the stator system is fixedly connected with the screen through a heat insulation device, the vibrator system responds to an electric signal of an external circuit to generate vibration and drives the stator to vibrate, and the stator drives the screen to vibrate and generate sound;

the shell comprises a side wall and 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;

one part of the flexible connecting device is fixed on the middle frame, the other part of the flexible connecting device is fixed on the side wall, and the middle frame and the side wall are both provided with accommodating grooves which are communicated with each other.

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 the receiving groove of the upper end surface of the side wall of the housing and the inner portion of the edge of the screen.

3. The electronic display device of any of claims 1-2, wherein the screen has a receiving slot for securing the flexible attachment mechanism.

4. The electronic display device of any of claim 1, further comprising a first elastic connector for connecting the vibration apparatus to the middle frame.

5. The electronic display device as claimed in any one of claims 1 to 2, wherein the flexible connecting means is made of rubber or silicone.

6. The electronic display device as claimed in any one of claims 1 to 2, wherein the receiving groove has a trapezoidal or arc-shaped cross section.

7. An electronic device, characterized in that it comprises an electronic display device according to any one of claims 1 to 6.