KR102490160B1 - Electronic apparatus - Google Patents

Abstract

The present application provides an electronic device capable of lightening and slimming and outputting sound to the front of a display panel through vibration of a display module. A housing enclosing one of a rear surface and a side surface, a vibration module disposed on the rear surface of the display module to vibrate the display module, and a first heat dissipation member disposed between the display module and the vibration module.

Description

Electronic equipment {ELECTRONIC APPARATUS}

This application relates to electronic devices.

In general, electronic devices such as televisions, monitors, notebook computers, smart phones, tablet computers, electronic pads, wearable devices, watch phones, portable information devices, navigation devices, or vehicle control display devices are display devices for displaying images and images. and a sound device for outputting sound related to the sound.

However, in a general display device, since the sound output from the sound device travels to the rear or lower part of the display panel, the sound quality is degraded due to interference between sounds reflected from the wall or the ground, which makes it difficult to accurately transmit the sound to the viewer. There is a problem that the sense of immersion is lowered.

A technical problem of the present application is to provide an electronic device capable of lightening and slimming and outputting sound to the front of a display panel through vibration of a display module.

An electronic device according to the present application includes a display module displaying an image, a housing surrounding one of the rear and side surfaces of the display module, a vibration module disposed on the rear surface of the display module and vibrating the display module, and disposed between the display module and the vibration module. It includes a first heat dissipation member.

The present application can make electronic devices lighter and slimmer by outputting sound to the front of the display panel through vibration of the display module.

In addition, the present application can prevent poor image quality and deterioration in visibility of the display panel by attaching a heat dissipation member.

In addition to the effects of the present application mentioned above, other features and advantages of the present application will be described below, or will be clearly understood by those skilled in the art from such description and description.

1 is a perspective view illustrating an electronic device according to an example of the present application.
2 is a cross-sectional view taken along line II′ of FIG. 1 according to an embodiment of the present application.
FIG. 3 is a rear view of the display panel shown in FIG. 1 .
4 is a cross-sectional view taken along line II′ of FIG. 1 according to two embodiments of the present application.

Advantages and features of the present application, and methods of achieving them, will become clear with reference to examples described below in detail in conjunction with the accompanying drawings. However, the present application is not limited to the examples disclosed below and will be implemented in a variety of different forms, only examples of the present application make the disclosure of the present application complete, and common knowledge in the art to which this application belongs It is provided to fully inform the person who has the scope of the invention, and this application is only defined by the scope of the claims.

Since the shape, size, ratio, angle, number, etc. disclosed in the drawings for explaining an example of the present application are exemplary, the present application is not limited to the matters shown. Like reference numbers designate like elements throughout the specification. In addition, in describing the present application, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present application, the detailed description will be omitted.

When 'includes', 'has', 'consists', etc. mentioned in this specification is used, other parts may be added unless 'only' is used. In the case where a component is expressed in the singular, the case including the plural is included unless otherwise explicitly stated.

In interpreting the components, even if there is no separate explicit description, it is interpreted as including the error range.

In the case of a description of a positional relationship, for example, 'on top of', 'on top of', 'at the bottom of', 'next to', etc. Or, unless 'directly' is used, one or more other parts may be located between the two parts.

In the case of a description of a temporal relationship, for example, 'immediately' or 'directly' when a temporal precedence relationship is described in terms of 'after', 'following', 'next to', 'before', etc. It can also include non-continuous cases unless is used.

Although first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Therefore, the first element mentioned below may be the second element within the technical spirit of the present application.

"First horizontal axis direction", "second horizontal axis direction", and "vertical axis direction" should not be interpreted only as a geometric relationship in which the relationship between each other is vertical, and the range in which the configuration of the present application can function functionally It can mean having a wider direction than within.

The term “at least one” should be understood to include all possible combinations from one or more related items. For example, "at least one of the first item, the second item, and the third item" means not only the first item, the second item, or the third item, respectively, but also two of the first item, the second item, and the third item. It may mean a combination of all items that can be presented from one or more.

Each feature of the various examples of the present application can be partially or entirely combined or combined with each other, technically various interlocking and driving are possible, and each example can be implemented independently of each other or can be implemented together in a related relationship. .

Hereinafter, an embodiment of an electronic device according to the present application will be described in detail with reference to the accompanying drawings. In adding reference numerals to components of each drawing, the same components may have the same numerals as much as possible even if they are displayed on different drawings.

1 is a perspective view illustrating an electronic device according to an example of the present application, FIG. 2 is a cross-sectional view taken along the line II′ of FIG. 1 according to an embodiment of the present application, and FIG. 3 is a view of a display panel shown in FIG. This is the rear view. 3 is for showing a structure in which a vibration module is disposed on a rear surface of a display panel, and can be viewed as a plan view omitting other components.

1 to 3 , an electronic device according to an example of the present application includes a display module 100, a vibration generating element 200, a first heat dissipation member 310, and a housing 400.

The display module 100 may include a display panel 110 .

The display panel 110 may be a light emitting display panel or a flexible light emitting display panel. The display panel 110 according to an example may include a pixel array substrate having a pixel array composed of a plurality of pixels and an encapsulation layer encapsulating the pixel array.

Each of the plurality of pixels is provided in a pixel area defined by pixel driving lines. Further, each of the plurality of pixels may include a pixel circuit having at least two thin film transistors and at least one capacitor, and a light emitting element that emits light by current supplied from the pixel circuit. As an example, the light emitting device may include an organic light emitting layer or a quantum dot light emitting layer. As another example, the light emitting device may include a micro light emitting diode.

The encapsulation layer protects the thin film transistor and the light emitting element from external impact and prevents moisture from penetrating into the light emitting element. Also, the encapsulation layer may be replaced with an encapsulation substrate attached to the pixel array substrate through a filler surrounding the pixel array. When the filler is formed of a transparent filler, the encapsulation substrate may be a transparent encapsulation substrate.

The display module 100 according to an example of the present application may further include a touch panel 130 . The touch panel 130 is provided on the display panel 110 and includes a touch electrode layer having touch electrodes for sensing a user's touch on the display module 100 . The touch electrode layer senses a change in capacitance of the touch electrode according to a user's touch. For example, the touch electrode layer includes a touch electrode for sensing a user's touch according to a mutual capacitance method or a self capacitance method.

The display module 100 according to an example of the present application may further include a polarizing film 150 disposed on the touch panel 130 . The polarizing film 150 is attached to the upper surface of the touch panel 130 via a film attachment member. The polarizing film serves to improve visibility and contrast ratio of the display panel 110 by changing external light reflected by thin film transistors and/or pixel driving lines provided on the pixel array substrate into a circularly polarized state. Also, the polarizing film 150 may be disposed between the encapsulation layer of the display panel 110 and the touch panel 130 .

Also, the display module 100 may further include a barrier layer interposed between the encapsulation layer of the display panel 110 and the touch panel 130 . The barrier layer may serve to prevent moisture or the like from penetrating toward the pixel array.

Also, the display module 100 may further include a color filter layer provided on the upper surface of the encapsulation layer of the display panel 110 . The color filter layer may include a color filter that is provided to overlap each of a plurality of pixels and transmits only wavelengths of colors set for each of a plurality of pixels.

The vibration module 200 is disposed on the rear surface of the display module 100, that is, the rear surface of the display panel 110, and vibrates the display module 100 according to a vibration drive signal, thereby oscillating the display panel 110. Sound is output in the forward direction (Z) of (110). The vibration module 200 according to an example may include first and second vibration elements 210 and 230 disposed on the rear surface of the display module 100 , that is, on the rear surface of the display panel 110 .

The first vibration element 210 vibrates the first area A1 of the display module 100 according to the vibration driving signal provided from the driving circuit unit 300 . The first vibration element 210 may be formed to have a certain length and a certain width. Here, the first area A1 is the central portion CP of the display module 100 and one end ( 110a) can be defined between. For example, the first area A1 may be defined as an edge area at one side of the display module 100 based on the longitudinal direction (or horizontal direction) X of the display module 100 . Also, the longitudinal direction of the first vibrating element 210 may be parallel to the width direction (or vertical direction) (Y) of the display module 100 .

The second vibrating element 230 vibrates the second area A2 of the display module 100 according to the vibration driving signal provided from the driving circuit 300 . The second vibration element 230 may be formed to have a certain length and a certain width. Here, the second area A2 is the center CP of the display module 100 and the other end ( 110b) can be defined between. For example, the second area A2 may be defined as an edge area on the other side of the display module 100 based on the longitudinal direction (or horizontal direction) X of the display module 100 . Also, the longitudinal direction of the second vibrating element 230 may be parallel to the width direction (or vertical direction) (Y) of the display module 100 . The second vibrating element 230 may be disposed symmetrically with the first vibrating element 210 based on the center CP of the display module 100 .

Each of the first vibration element 210 and the second vibration element 230 according to an example includes a piezoelectric material layer having a piezoelectric effect, a first electrode disposed on the front surface of the piezoelectric material layer, and a piezoelectric material layer. It may include a second electrode disposed on the rear surface.

The piezoelectric material layer includes a piezoelectric material that generates vibrations by an electric field. Here, in the piezoelectric material, a potential difference is generated by dielectric polarization due to a change in the relative position of positive (+) ions and negative (-) ions while pressure or torsion is applied to the crystal structure by an external force. It has a characteristic that vibration is generated by an electric field. The piezoelectric material of the vibration element 310 according to an example may include any one of a ceramic material, a polymer material, and a semiconductor material, or a mixture of two or more materials, and a ceramic piezoelectric material having a wide frequency response characteristic. It can be done. Here, the ceramic piezoelectric material may include lead zirconate titanate (PZT) or barium carbonate (BaTiO3), the polymeric piezoelectric material may include polyvinylidene difluoride (PVDF), and the like, and the semiconductor piezoelectric material may include zinc oxide (ZnO) and the like. Cadmium sulfide (CdS) and the like may be included.

The first electrode and the second electrode are provided to overlap each other with a piezoelectric material layer interposed therebetween. Also, the first electrode and the second electrode may be made of an opaque metal material having relatively low resistance and excellent heat dissipation characteristics, but are not limited thereto, and may be made of a transparent conductive material or a conductive polymer material in some cases.

The first heat dissipation member 310 is provided on the rear surface of the display module 100 . For example, the first heat dissipation member 310 may be disposed between the display module 100 and the vibration module 200 . The first heat dissipation member 310 may be attached to the rear surface of the display module 100 and the front surface of the vibration module 200 through an adhesive member. In addition, the adhesive member may be disposed to be larger than or equal to the size of the vibration module 200 to attach the first heat dissipation member 310 and the vibration module 200 . The first heat dissipation member 310 may be disposed between the vibration module 200 and the display module 100 to prevent heat generated from the vibration module 200 from being transferred to the display module 100 .

The adhesive member may be a double-sided tape or a natural curable adhesive. Here, the adhesive member may be made of a thermosetting adhesive or a photocurable adhesive. In this case, since the characteristics of the vibration element may be deteriorated by heat in the curing process of the adhesive member, it may be made of a double-sided tape or a natural curable adhesive.

The first heat dissipation member 310 according to an example may have a polygonal plate shape having a constant thickness. Also, the first heat dissipation member 310 may be disposed on the entire rear surface of the display module 100 . Also, the size of the first heat dissipation member 310 may be equal to or larger than that of the vibration module 200 . For example, the first heat dissipation member 310 is not disposed on the entire rear surface of the display module 100, and the first heat dissipation member 310 is disposed in a size slightly larger than or identical to that of the vibration module 200. It can be. For example, the first heat dissipation member 310 may be implemented as a heat dissipation pad, a heat dissipation sheet, or a heat dissipation tape made of a metal material having high thermal conductivity, such as aluminum (Al), copper (Cu), silver (Ag), or an alloy thereof. can

The first heat dissipation member 310 according to an example may prevent heat generated from the vibration module 200 from being introduced into the display module 100 . For example, the first heat dissipation member 310 may prevent heat generated from the vibration module 200 from flowing into a light emitting element included in the display panel 110 . Accordingly, the first heat dissipation member 310 may prevent poor image quality of the display panel 110 due to a rapid temperature difference in a local area of the display module 100 . In addition, since the first heat dissipation member 310 is disposed between the vibration module 200 and the display module 100 and can be disposed on the entire rear surface of the display module 100, the display panel 110 vibrates the module ( 200) It is possible to prevent deterioration of visibility depending on the attachment position.

The housing 400 accommodates the display module 100 . The housing 400 according to an example includes a housing sidewall 410 and a housing plate 430 .

The housing sidewall 410 is formed in a frame shape to have a display storage space in which the display module 100 is accommodated, and surrounds each side of the display module 100 and the first heat dissipation member 310 . The housing sidewall 410 supports the cover window 600 and the rear cover 700 . The housing sidewall 410 includes an upper stepped portion 411 that is concavely provided from the upper inner surface and supports the cover window 600, and a lower stepped portion that is provided concavely from the lower inner surface and supports the rear cover 700 ( 413).

The housing plate 430 is connected to the inner surface of the housing sidewall 410 to cover the rear surface of the display module 100 . For example, the housing plate 430 is disposed on the rear surface of the first heat dissipation member 310 . On the front side of the housing plate 430, a display accommodating space surrounded by the housing sidewall 410 is provided, and on the rear side of the housing plate 430, an electronic device including a circuit configuration such as a driving circuit unit 500 and a battery, etc. A circuit accommodating space in which peripheral circuits and the like are accommodated is provided. To this end, the housing plate 430 may be spaced apart from the rear surface of the first heat dissipation member 310 and may be spaced apart from the rear cover 700 .

The housing 400 further includes a vibrating element exposed portion 435 provided on the housing plate 430 .

The vibration element exposure part 435 is formed to pass through each of the first and second regions of the housing plate 430 overlapping each of the first and second regions A1 and A2 of the display module 100 . do. Accordingly, each of the first vibration element 210 and the second vibration element 230 coupled to each of the first area A1 and the second area A2 of the display module 100 is a vibration element exposed portion 435 It is exposed to the rear surface of the housing plate 430 through. In addition, lower portions of each of the first vibration element 210 and the second vibration element 230 may be inserted into or accommodated in the exposed part 435 of the vibration element.

The vibration element exposed portion 435 according to an example may be defined as a vibration space for vibration of each of the first vibration element 210 and the second vibration element 230 coupled to the display module 100, and the housing plate If the distance between 430 and the rear surface of the display module 100 is greater than the vibrating space, it may be omitted, but may be formed to slim down the electronic device.

An electronic device according to an example of the present application may further include a driving circuit unit 500 , a cover window 600 , and a rear cover 700 .

The driving circuit unit 500 is disposed in a circuit accommodating space provided in the housing 400 and is connected to the display panel 110 and the vibration module 200 . The driving circuit unit 500 may include a panel driving circuit and a sound processing circuit.

The panel driving circuit is mounted on the display panel 110 or a circuit board to display an image on the display panel 110 . The panel driving circuit is connected to a pad provided on the pixel array substrate of the display panel 110 and displays an image on each pixel by supplying a driving signal and a data signal to the pixel driving lines.

The sound processing circuit generates an audio signal based on an audio source and amplifies the audio signal to generate a vibration driving signal, and the first vibration generating element 210 and the first vibration generating element 210 of the vibration module 200 according to the generated vibration driving signal. Each of the two vibration generating elements 230 is vibrated.

The cover window 600 is coupled to the housing 400 to support the display module 100 . For example, the cover window 600 may support the display module 100 and be supported by the upper stepped portion 411 provided on the housing sidewall 410 of the housing 400 .

The cover window 600 according to an example may be made of glass or a tempered glass material. For example, the cover window 600 may have any one of sapphire glass and gorilla glass, or a bonding structure thereof. The cover window 600 may be attached to the front surface of the display module 100 via an optical adhesive member. In this case, the optical adhesive member may be optically clear adhesive (OCA), optically clear resin (OCR), or pressure sensitive adhesive (PSA).

A buffer member 420 may be interposed between the cover window 600 and the upper stepped portion 411 provided on the housing sidewall 410 of the housing 400 . The buffer member 420 may include double-sided tape or a foam pad. The buffer member 420 buffers an impact applied to the cover window 600 , prevents vibration of the display module 100 from being transmitted to the housing 400 , and enables vibration of the display module 100 .

The cover window 700 according to an example covers the non-display area other than the display area of the display module 100 . The cover window 600 according to an example is provided in a transparent area overlapping the display area of the display module 100, a light blocking area overlapping the non-display area of the display module 100, and a light blocking area. A design layer covering the non-display area may be included.

The rear cover 700 is coupled to the housing 400 and covers the rear surface of the housing 400 . For example, the rear cover 700 covers a circuit accommodating space provided on the rear surface of the housing 400 .

The rear cover 700 according to an example may be supported by the lower stepped portion 413 provided on the housing sidewall 410 of the housing 400 . For example, the rear cover 700 may be made of the same material as the cover window 600 or a glass material different from that of the cover window 600 .

As described above, in the electronic device according to an example of the present application, the display module 100 vibrates according to the driving of the vibration module 200, and thus the sound generated according to the vibration of the display module 100 is transmitted to the display panel 110. It can be output toward the viewer (or user) watching the video from the front. Therefore, according to an example of the present application, the electronic device can increase the immersion of the viewer watching the image by outputting sound to the viewer through the vibration of the display module 100 without a separate sound device or speaker, and light weight and /or can be slimmed down.

And, in the electronic device according to an example of the present application, heat generated from the vibration module 200 is transferred to the display module 100 through the first heat dissipation member 310 disposed between the display module 100 and the vibration module 200. ) can be prevented. Accordingly, it is possible to prevent a picture quality defect of the display panel 110 due to a sharp temperature difference in a local area of the display module 100 . In addition, it is possible to prevent the visibility of the display panel 110 from deteriorating according to the attachment position of the vibration module 200 through the first heat dissipating member 310 disposed on the entire rear surface of the display module 100 .

4 is a cross-sectional view taken along line II′ of FIG. 1 according to two embodiments of the present application. Hereinafter, redundant description of configurations overlapping those of FIGS. 1 to 3 will be omitted and additional configurations will be described.

Referring to FIG. 4 , an electronic device according to an example of the present application includes a second heat dissipation member 330 and a first adhesive member 800 .

The second heat dissipation member 330 is provided on the rear surface of the vibration module 200 . The second heat dissipation member 330 may be attached to the rear surface of the first heat dissipation member 310 and the rear surface of the vibration module 200 through the first adhesive member 800 . The second heat dissipation member 330 may be disposed on the rear surface of the vibration module 200 to dissipate heat generated in the vibration module 200 to the outside.

The second heat dissipation member 330 according to an example may have a polygonal plate shape having a constant thickness. In addition, the second heat dissipation member 330 may be implemented as a heat dissipation pad, a heat dissipation sheet, or a heat dissipation tape made of a metal material having high thermal conductivity, such as aluminum (Al), copper (Cu), silver (Ag), or an alloy thereof. .

The first adhesive member 800 may be a double-sided tape or a natural curable adhesive. Here, the first adhesive member 800 may be made of a thermosetting adhesive or a photocurable adhesive. In this case, since the characteristics of the vibration element may be deteriorated by the heat of the curing process of the first adhesive member 800, a double-sided tape or natural adhesive may be used. It may be made of a curable adhesive.

The first adhesive member 800 according to an example is provided to cover the side surface of the vibration module 200 . For example, since the first heat dissipation member 310 and the second heat dissipation member 330 are disposed on the front and rear surfaces of the vibration module 200, the first heat dissipation member 310 and the second heat dissipation member 330 are attached. The first adhesive member 800 is disposed to cover the side surface of the vibration module 200 .

Also, the size of the first heat dissipation member 310 and the second heat dissipation member 330 may be equal to or larger than that of the vibration module 200 . For example, the first heat dissipation member 310 and the second heat dissipation member 330 are not disposed on the entire rear surface of the display panel 110 and the rear surface of the vibration module 200, but are slightly larger than the size of the vibration module 200. Can be larger or equally spaced. In this configuration, the first adhesive member 800 may be disposed in the same size as the first heat dissipation member 310 and the second heat dissipation member 330 . And, as described in FIG. 2, the first heat dissipation member 310, the vibration module 200, the first adhesive member 800, and the second heat dissipation member 330 are inserted into the vibration element exposed portion 435 or can be accepted Therefore, it is not necessary to increase the distance between the housing plate 430 and the rear surface of the display module 100, and the electronic device can be slimmed down.

In the electronic device according to the present application, the first heat dissipation member 310 and the second heat dissipation member 330 are disposed on the front and rear surfaces of the vibration module 200, respectively, to increase the heat spreading effect of the vibration module 200. can For example, when the vibration module 200 includes a piezoelectric material, heat is generated through the front and rear surfaces of the piezoelectric material. It is advantageous.

In the electronic device according to the present application, the first heat dissipation member 310 and the second heat dissipation member 330 are attached through the first adhesive member 800, and the first adhesive member 800 is the vibration module 200. It is formed to cover the side of the. Therefore, the effect of increasing the mass of the vibration module 200 and the effect of increasing the contact area between the vibration module 200 and the display panel 110 can be obtained, and sound in a low frequency band can be improved. That is, since it is possible to improve the sound in the low frequency band by attaching the first heat dissipating member 310 and the second heat dissipating member 330 without increasing the area of the vibration module 200, low frequency improved with low cost/low power. A range of sounds can be output.

In the electronic device according to the present application, since the vibration module 200 may be surrounded and fixed by the first heat dissipation member 310, the second heat dissipation member 330, and the first adhesive member 800, rattle noise noise) can be prevented. Accordingly, the electronic device according to the present application may output improved sound to which noise is not added.

Also, the vibration module according to the exemplary embodiment of the present application can be applied to a display device. The display device according to the embodiment of the present application is a mobile device, a video phone, a smart watch, a watch phone, a wearable device, a foldable device, and a rollable device. device), bendable device, flexible device, curved device, electronic notebook, e-book, PMP (portable multimedia player), PDA (personal digital assistant), MP3 player, mobile Medical equipment, desktop PC, laptop PC, netbook computer, workstation, organic light emitting lighting device, inorganic light emitting lighting device, navigation, vehicle navigation, television, Shinage ( It can be applied to signage devices, game devices, wallpaper devices, laptops, monitors, cameras, camcorders, and home appliances.

The present application described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which this application belongs that various substitutions, modifications, and changes are possible without departing from the technical details of the present application. It will be clear to those who have knowledge of Therefore, the scope of the present application is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present application.

100: display module 110: display panel
200: vibration module 310: first heat dissipation member
330: second heat dissipation member 400: housing
500: driving circuit unit 600: cover window
700: rear cover 800: first adhesive member

Claims (12)

a display module displaying an image;
a housing surrounding one of a rear surface and a side surface of the display module;
a vibration module disposed on a rear surface of the display module to vibrate the display module;
a first heat dissipation member disposed between the display module and the vibration module;
a second heat dissipation member disposed on a rear surface of the vibration module and facing the first heat dissipation member; and
and an adhesive member disposed between the first and second heat dissipation members and covering an entire surface of the vibration module. According to claim 1,
A size of the first heat dissipation member is equal to or greater than a size of the vibration module. delete According to claim 1,
A size of the first heat dissipation member and the second heat dissipation member is equal to or greater than a size of the vibration module. delete According to claim 1,
The vibration module includes a piezoelectric material layer, the electronic device. According to claim 1,
The display module has a first rear area and a second rear area based on the center of the rear surface,
The vibration module,
a first vibration generating element disposed on a first rear surface area of the display module; and
An electronic device comprising a second vibration generating element disposed on a second rear surface area of the display module. According to claim 7,
the housing,
housing sidewalls surrounding side surfaces of the display module and side surfaces of the first heat dissipating member;
a housing plate surrounding a rear surface of the first heat dissipation member; and
A vibration element exposed portion provided on the housing plate;
The first vibration generating element and the second vibration generating element are exposed to the rear surface of the housing plate through the vibration element exposure part. According to claim 8,
Further comprising a cover window supporting the display module,
The electronic device, wherein the cover window is supported on an upper stepped portion provided on a sidewall of the housing. According to claim 9,
The electronic device further comprises a buffer member provided between the cover window and the upper stepped portion. According to claim 8,
Further comprising a rear cover covering the rear surface of the housing,
The electronic device, wherein the rear cover is supported on a lower stepped portion provided on a sidewall of the housing. According to claim 1,
The electronic device further comprises a driving circuit provided in the housing and connected to the display panel and the vibration module.

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