KR20190081897A - Electronic apparatus - Google Patents

Abstract

The present application is to provide an electronic device which is advantageous for high-pitched sound implementation. The electronic device according to the present application includes a display panel for displaying an image, a backlight module disposed at the rear of the display panel with an air gap therebetween, a rear mechanism disposed at the rear of the backlight module, and at least one vibration generation module disposed at the rear mechanism. The at least one vibration generation module vibrates the backlight module while reducing the air gap.

Description

[0001] ELECTRONIC APPARATUS [

The present application relates to electronic devices.

Generally, an electronic device is mounted on an electronic or household appliance such as a television, a monitor, a notebook computer, a smart phone, a tablet computer, an electronic pad, a wearable device, a watch phone, a portable information device, a navigation device, Used as a screen to display images.

A general electronic apparatus includes a display panel for displaying an image, and a sound device for outputting sound associated with the image.

However, since the sound output from a sound device moves backward or downward of the display panel, the sound quality of the sound is degraded due to the interference between the sound reflected from the wall or the floor, which makes it difficult to accurately transmit sound. And the like.

The contents of the background art described above are technical information acquired by the inventor of the present application for the purpose of deriving the present application or acquired in the process of deriving the present application, There is no number.

SUMMARY OF THE INVENTION The present invention is directed to providing an electronic apparatus advantageous for high-frequency implementation.

An electronic apparatus according to the present application includes a display panel for displaying an image, a backlight module disposed on a rear surface of the display panel with an air gap therebetween, a rear surface mechanism disposed on a rear surface of the backlight module, Module, wherein at least one vibration generating module vibrates the backlight module while reducing the air gap.

The electronic device according to the present application uses a display panel that vibrates in conjunction with the vibration of the backlight module as a diaphragm of the acoustic device to output sound to the front of the display panel rather than to the rear and the bottom of the display panel, And the feeling of immersion of the viewer can be increased.

In addition, since the electronic device according to the present application can reduce the air gap provided between the display panel and the backlight module, the sound of the high frequency band can be improved.

In addition to the effects of the present application discussed above, other features and advantages of the present application will be set forth below, or may be apparent to those skilled in the art to which the present application belongs from such description and description.

1 is a rear perspective view of an electronic device according to an example of the present application.
2 is a schematic cross-sectional view of the line I-I 'shown in Fig.
3 is a cross-sectional view illustrating a vibration generating module according to an example of the present application.
4 is a cross-sectional view of an electronic device according to an example of the present application in a state in which an air gap is reduced.
5 is a cross-sectional view of an electronic device according to an example of the present application, in which an air gap is maintained.
6 is a rear view of an electronic device according to another example of the present application.
7 is a schematic cross-sectional view of line II-II 'shown in FIG.
8 is a graph showing acoustic output characteristics of an electronic apparatus according to the present application and a comparative example.

Brief Description of the Drawings The advantages and features of the present application, and how to accomplish them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that this application is not limited to the examples disclosed herein, but may be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein, To fully disclose the scope of the invention to those skilled in the art, and this application is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, and the like described in the drawings for describing an example of the present application are illustrative, and thus the present application is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the description of the present application, a detailed description of known related arts will be omitted if it is determined that the gist of the present application may be unnecessarily obscured.

Where the terms "comprises," "having," "consisting of," and the like are used in this specification, other portions may be added as long as "only" is not used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

In the case of a description of a temporal relationship, for example, if the temporal relationship is described by 'after', 'after', 'after', 'before', etc., May not be continuous unless they are not used.

The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the scope of the present application.

The terms "first horizontal axis direction "," second horizontal axis direction ", and "vertical axis direction" should not be interpreted solely by the geometric relationship in which the relationship between them is vertical, It may mean having a wider directionality in the inside.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "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, but also the second item and the second item among the first item, May refer to any combination of items that may be presented from more than one.

Each of the features of the various embodiments of the present application may be combined or combined with each other partially or entirely, technically various interlocking and driving are possible, and the examples may be independently performed with respect to each other, .

Hereinafter, a preferred example of an electronic apparatus according to the present application will be described in detail with reference to the accompanying drawings. In adding reference numerals to the constituent elements of the drawings, the same constituent elements may have the same sign as possible even if they are displayed on different drawings

FIG. 1 is a rear perspective view of an electronic device according to an example of the present application, and FIG. 2 is a schematic cross-sectional view of a line I-I 'shown in FIG.

1 and 2, an electronic apparatus according to an exemplary embodiment of the present invention includes a display panel 100, a backlight module 200, a rear mechanism 300, and a vibration generating module 400.

The display panel 100 displays an image and includes a front surface on which an image is displayed and a rear surface on which light is emitted from the backlight module 200. The display panel 100 according to an exemplary embodiment is a liquid crystal display panel, and displays an image using light emitted from the backlight module 200.

The backlight module 200 is disposed on the rear surface of the display panel 100 with reference to the thickness direction Z of the display panel 100 to illuminate the rear surface of the display panel 100 with light. For example, the front surface of the backlight module 200 is arranged to face the rear surface of the display panel 100 with the air gap AG therebetween, and the back surface of the backlight module 200 is disposed on the rear surface (300).

The back surface mechanism 300 is disposed on the back surface of the backlight module 200 and covers the back surface of the backlight module 200 to support the vibration generating module 400.

The rear mechanism 300 according to one example may include a rear cover 310, and a side cover member 330.

The rear cover 310 is disposed to cover the back surface of the backlight module 200. The rear cover 310 may have a flat plate shape made of a glass material, a metal material, or a plastic material. Here, the edge or the sharp edge portion of the rear cover 310 may have a slope shape or a curved shape by a chamfering process or a corner rounding process. For example, the rear cover 310 of the glass material may include any one of sapphire glass and gorilla glass, or a laminated glass thereof. For example, the metallic rear cover 310 may be made of any one of aluminum, an aluminum alloy, a magnesium alloy, and an alloy of iron and nickel. For example, the rear cover 310 may have a laminated structure of a glass plate facing the rear surface of the backlight module 200 with a relatively thin thickness than the metal plate and the glass plate. In this case, May be used as a mirror surface by a metal plate.

The rear cover 310 includes a module insertion port 310h into which a part of the vibration generating module 400 is inserted. The module insertion port 310h is formed to vertically penetrate the rear cover 310 along the thickness direction Z of the rear cover 310. [ The module insertion port 310h according to one example may have a circular or polygonal shape in which the vibration generating module 400 can be inserted (or received).

The side cover member 330 surrounds the side surface of the backlight module 200 and prevents lateral light leakage of the electronic device. For example, the side cover member 330 is interposed between the rear edge of the display panel 100 and the front edge of the rear mechanism 300 to seal between the display panel 100 and the rear mechanism 300, The light emitted from the backlight module 200 to the display panel 100 is prevented from leaking to the outside through the side surface of the electronic device. The side cover member 330 according to one example may be a double-sided foam tape or an adhesive resin. In order to minimize vibration of the display panel 100 from being transmitted to the rear cover 310, the side cover member 330 may be made of a material such as acrylic or Urethane, And may include urethane-based materials having ductility characteristics. The side cover member 330 seals between the display panel 100 and the rear structure 300 exposed to the outside of the electronic device to improve the appearance of the electronic device.

The vibration generating module 400 is supported by the back cover 300 such as the rear cover 310 and inserted into the module insertion port 310h of the rear cover 310 to be brought into contact with the back surface of the backlight module 200. [ The vibration generating module 400 generates a negative pressure by vibrating the backlight module 200 and outputs the sound due to the vibration of the display panel 100 according to the negative pressure to the front of the display panel 100. The vibration generating module 400 generates sound by using the display panel 100, which vibrates together with the vibration of the backlight module 200, as a diaphragm.

The vibration generating module 400 according to an exemplary embodiment of the present invention penetrates the back surface assembly 300 and contacts the back surface of the backlight module 200 to directly vibrate the backlight module 200. The upper part of the vibration generating module 400 is inserted into the module insertion port 310h provided in the rear mechanism 300 and connected to the rear surface of the backlight module 200. The lower part of the vibration generating module 400 is connected to the rear surface of the rear cover 310 And can be fixed to the rear surface. Accordingly, the vibration generating module 400 vibrates according to a voice current corresponding to an acoustic signal (or a voice signal) or an acoustic signal related to an image, using the rear cover 310 of the rear mechanism 300 as a support, 200, the display panel 100 vibrates in conjunction with the vibration of the backlight module 200 and outputs sound in a forward direction.

The vibration generating module 400 according to an exemplary embodiment may be a speaker, a sound actuator, a sound exciter, or a piezoelectric element, but is not limited thereto. Lt; / RTI > Alternatively, the vibration generating module 400 may include at least two sub-vibration generating modules arranged in parallel and spaced apart from each other. Accordingly, the electronic device according to an example of the present application may include at least one or more vibration generating modules 400.

The vibration generating module 400 according to one example can reduce the air gap AG. The vibration generating module 400 can pull the display panel 100 by the magnetic force to reduce the air gap AG. For example, the vibration generating module 400 includes an electromagnet capable of forming a magnetic field by an electric signal. The vibration generating module 400 pulls the display panel 100 through a magnetic field formed in the electromagnet by an electric signal, .

The electronic device according to an example of the present application may further include a module connecting member 500.

The module connecting member 500 is interposed between the edge of the backlight module 200 and the edge of the rear structure 300. The module connecting member 500 according to an example is connected to the rear edge of the backlight module 200 between the edge of the backlight module 200 and the edge of the rear cover 310, Thereby providing a gap between the backlight module 200 and the back cover 310. The gap space may be defined by an insertion space in which a part of the vibration generating module 400 inserted into the module insertion port 310h of the rear cover 310 is disposed and a vibration of the backlight module 200 caused by driving the vibration generating module 400 Can be used as a panel vibration space.

The module connecting member 500 according to an exemplary embodiment may have a four-side closed loop structure or a four-side split structure having a constant thickness (or height) and a width, but is not limited thereto. The module connecting member 500 may include, but is not limited to, a one-sided tape, a foam pad, a double-sided tape, a double-sided foam tape, or an adhesive resin. The double-sided tape may be, for example, acryl based, but is not limited thereto. Other examples include urethane-based foam pads, elastic resins, and the like. It may be made of a material having elasticity that can be compressed to a certain extent, and may be made of polyurethane, polyolefin, and polyethylene, but is not limited thereto.

3 is a cross-sectional view illustrating a vibration generating module according to an example of the present application.

Referring to FIG. 3, the vibration generating module 400 according to an exemplary embodiment of the present invention is configured to vibrate the backlight module 200 according to a current applied based on Fleming's left hand rule.

The vibration generating module 400 according to an exemplary embodiment may include an actuator arranged to be in contact with a rear portion of the backlight module 200. The vibration generating module 400 including the actuator includes a module frame 401, a magnet 402, a center pole 403, a bobbin 404, a coil 405, a damper 406, and a magnet plate 407 can do.

The module frame 401 is fixed to the rear cover 310 so as to be partially inserted into the module insertion opening 310h provided in the rear mechanism 300, that is, the rear cover 310. [ The module frame 401 according to an example includes a frame body 401a and a fixing bracket 401b.

The upper part of the frame body 401a is inserted into the module insertion port 310h provided in the rear cover 310 so that the backlight module 200 and the rear cover 310 In the gap space. A predetermined gap G is provided between the frame body 401a and the module insertion port 310h of the rear cover 310. The predetermined gap G is formed in the gap space of the backlight module 200 And serves as a passage through which noise components generated during driving of the vibration generating module 400 are discharged to the outside, in addition to the sound pressure due to the vibration of the backlight module 200.

The fixing brackets 401b are disposed on one side and the other side of the frame body 401a, respectively, and fixed to the rear surface of the rear cover 300a.

The fixing bracket 401b according to an example may be fixed to the rear surface of the rear cover 300 by a plurality of frame fixing members 410. Each of the plurality of frame fixing members 410 may include a head portion and a thread portion vertically connected from the head portion. For example, each of the plurality of frame fixing members 410 may be a bolt, a screw, or the like. Each of the plurality of frame fixing members 410 is threaded through the fixing bracket 401b and is fastened to the fixing hole 315 provided on the rear surface of the rear cover 300 so that the fixing bracket 401b is fixed to the rear cover 300 Fix it to the rear. Accordingly, the module frame 401 can be fixed to the rear surface of the rear cover 300 by the plurality of frame fixing members 410, respectively.

The fixing bracket 401b according to another example may be fixed to the rear surface of the rear cover 300 by an adhesive member such as double-sided tape or the like. In this case, the adhesive member acts as a kind of damper according to the elasticity and the thickness, thereby minimizing the direct transmission of vibration generated when the vibration generating module 400 is driven to the rear cover 310.

The magnet 402, the center pole 403, the bobbin 404 and the coil 405 may be represented by a magnetic circuit unit disposed in the module frame 401 to vibrate the backlight module 200. Such a magnetic circuit unit can be represented by a dynamic type or a magnet type in which the magnet 402 is disposed outside the coil 405. [

The magnet 402 may be a permanent magnet. The magnet 402 according to an exemplary embodiment may use sintered magnets such as barium ferrite. The material may be ferric trioxide (Fe2O3), barium carbonate (BaCO3), strontium ferrite with improved magnetic properties strontium ferrite, aluminum (Al), nickel (Ni), or cobalt (Co) alloy casting magnet, but are not limited thereto. The magnet 402 may have a ring shape.

The bobbin 404 is received or inserted into the magnet 402. For example, the bobbin 404 is inserted into the inside of the magnet 402 so that the outer circumferential surface of the bobbin 404 is surrounded by the magnet 402. The bobbin 404 according to an exemplary embodiment may be formed of a material obtained by processing pulp or paper, a synthetic resin such as aluminum or magnesium or an alloy thereof, polypropylene, or a polyamide fiber. The bobbin 404 according to one example may have a circular shape or an elliptical shape, but is not limited thereto. The elliptical bobbin 404 can improve the sound of the higher frequency range than the circular shape and can generate less heat due to vibration, so that it can have excellent heat radiation characteristics.

The coil 405 is wound so as to surround the lower outer peripheral surface of the bobbin 404 and is supplied with an acoustic generating current from the outside. The coil 405 is lifted and lowered together with the bobbin 404. Here, the coil 405 may be represented by a voice coil or the like. When an electric current is applied to the coil 405, the entire bobbin 404 is moved in accordance with the Fleming left-hand rule based on the applied magnetic field formed around the coil 405 and the external magnetic field formed around the magnet 402, And guided by the guide plate 403.

Since the front surface (or the front end portion) of the bobbin 404 is in contact with the rear surface of the backlight module 200, the bobbin 404 vibrates the back surface of the backlight module 200 according to the current application or non-application state , And the sound waves are generated by the vibration of the display panel (100) interlocked with the vibration of the backlight module (200).

Further, the bobbin 404 may further include a bobbin protecting member 404a. The bobbin protecting member 404a is disposed on the front surface of the bobbin 404 to transmit the upward movement (or vibration) of the bobbin 404 to the back surface of the backlight module 200. The bobbin protecting member 404a according to an example may be a ring-shaped plate member attached to the front surface of the bobbin 404, a disc member covering the front surface of the bobbin 404, or a cap member surrounding the front end of the bobbin 404 have.

The center pole 403 is received in or inserted into the bobbin 404 to guide the bobbin 404 up and down. For example, the center pole 403 is inserted into the bobbin 404 having a cylindrical shape, so that the outer circumferential surface of the center pole 403 is surrounded by the bobbin 404. Here, the center pawl 403 may be expressed by an elevating guider, pole piece, or the like.

The damper 406 may be disposed between the module frame 401 and the bobbin 404. The damper 406 may be disposed between the module frame 401 and the magnetic circuit unit. For example, the damper 406 may be disposed between the body protrusion of the frame body 401a constituting the module frame 401 and the bobbin 404 of the magnetic circuit unit. This damper 406 may be represented by other terms such as a spider, suspension, or edge.

One end of the damper 406 may be connected to the inner side wall of the body protrusion and the other end of the damper 406 may be connected to the upper side of the bobbin 404. The damper 406 has a corrugated structure between one end and the other end and adjusts the vibration of the bobbin 404 while contracting and relaxing in accordance with the upward and downward movement of the bobbin 404. The damper 406 is connected between the bobbin 404 and the module frame 401 to limit the vibration distance of the bobbin 404 through the restoring force. For example, when the bobbin 404 vibrates over a certain distance or vibrates below a certain distance, the bobbin 404 can be restored to its original position by the restoring force of the damper 406.

The magnet plate 407 is fixedly inserted into a hollow portion provided in the module frame 401 and supports the rear surface of the magnet 402 and the rear surface of the center pole 403, respectively. The magnet plate 407 according to an exemplary embodiment may be made of a magnetic material such as copper (Cu), iron (Fe), or the like.

The magnet plate 407 according to an example may be an electromagnet that forms a magnetic field by an electrical signal. The electromagnet corresponds to a temporary magnet corresponding to a permanent magnet. The electromagnet may be formed by winding enamel lines on magnetic material such as iron (Fe). Thus, the magnetic plate 407 can form a magnetic field by the electric signal supplied from the power source device, and pulls the display panel 100 through the magnetic field formed on the magnet plate 407 by the electric signal to generate the air gap AG) can be reduced.

The power supply device can supply an electric signal to the magnet plate 407 in accordance with a switching signal generated by the switching device. For example, when the switching signal is ON, an electric signal is supplied to the magnet plate 407, and when the switching signal is OFF, the electric plate is not supplied to the magnet plate 407. In this way, the magnetic plate 407 can form a magnetic field in accordance with the switching signal, so that the air gap AG can be selectively reduced.

The magnet plate 407 according to an example forms a magnetic field and can generate a magnetic force, so that the attraction force can be applied to the metal electrode and the metal wiring included in the display panel 100. [ At this time, the magnet plate 407 can attract the metal electrode and the metal wire through the attraction force, and the display panel 100 including the metal electrode and the metal wire can be pulled toward the magnet plate 407. As described above, when the display panel 100 is pulled, the air gap AG is reduced, and the display panel 100 and the backlight module 200 can be brought into contact with each other.

The electronic device according to the present application can reduce the air gap AG between the display panel 100 and the backlight module 200, and thus can be advantageous for realizing a high tone. The vibration generated by the vibration generating module 400 is transmitted to the display panel 100 through the backlight module 200 and the air gap AG is formed between the backlight module 200 and the display panel 100. [ The vibration transmission may be cut off and the problem of sound generation may occur. In particular, the vibration in the high frequency band, which is stronger than the vibration in the low frequency band, which is strong in the diffraction characteristic, is more likely to be cut off, and the high sound pressure in the display panel 100 may appear in the relatively low sound pressure in accordance with the vibration in the high frequency band. The electronic device according to the present application can reduce the air gap AG provided between the display panel 100 and the backlight module 200 through the magnet plate 407 included in the vibration generating module 400 , It is easy for the vibration of the high frequency band to be transmitted to the display panel 100, and thus the high-frequency implementation can be improved.

The electronic apparatus according to the present application can form the magnet plate 407 as an electromagnet, so that it is possible to emphasize the implementation of the low sound and the high sound selectively. For example, to emphasize low-frequency implementation, an electric signal may be applied to the magnet plate 407 to maintain the air gap AG, and an electrical signal may be supplied to the magnet plate 407 to emphasize high- The gap AG can be reduced. For example, as the air gap (AG) decreases, a high sound pressure is emphasized and a low sound performance can be emphasized when a high sound pressure is exhibited as the air gap (AG) is maintained.

The display device according to an example of the present application may further include a heat dissipating member 450. The heat dissipating member 450 is attached to the back surface of the backlight module 200 which overlaps with the vibration generating module 400. The heat dissipating member 450 may be coupled to the bobbin 404 of the vibration generating module 400 or may be coupled to the bobbin protecting member 404a via a coupling member 451. [ The heat generating member 450 is disposed at the center of the vibration generating module 400 and diffuses the heat generated when the vibration generating module 400 is driven toward the backlight module 200, And the vibration of the backlight module 200 due to the vibration of the vibration generating module 400 is more uniform. The heat dissipating member 450 according to an exemplary embodiment may be formed of any one of aluminum (Al), copper (Cu), silver (Ag), and magnesium (Mg), or a metal material having a high thermal conductivity have. Here, the heat radiating member 450 may be expressed by other terms such as a heat sink, a heat radiating sheet, a heat radiating layer, or a heat radiating plate.

FIG. 4 is a cross-sectional view of an electronic device according to an embodiment of the present invention in a state where an air gap is reduced, and FIG. 5 is a cross-sectional view of an electronic device according to an embodiment of the present invention. FIG. 4 and FIG. 5 are views for explaining the structure of the display panel and the structure of the backlight module in FIG. 2 in detail. Hereinafter, only the display panel and the backlight module and the configurations related to the display panel and the backlight module will be described, and redundant description of the remaining configurations will be omitted.

4 and 5, in an electronic device according to an exemplary embodiment of the present invention, a display panel 100 drives a liquid crystal layer according to an electric field formed for each pixel by a data voltage applied to each pixel and a common voltage Thereby displaying an image using light transmitted through the liquid crystal layer. The display panel 100 according to an exemplary embodiment includes a first substrate 110 and an upper substrate 130 facing each other with a liquid crystal layer interposed therebetween.

The first substrate 110 may be a thin film transistor array substrate and may include a pixel array portion having a plurality of pixels formed in each pixel region that can be defined by a plurality of gate lines and a plurality of data lines. Each of the plurality of pixels may include a thin film transistor connected to the gate line and the data line, a pixel electrode connected to the thin film transistor, and a common electrode formed adjacent to the pixel electrode and supplied with a common voltage.

The first substrate 110 may include a pad portion provided on the first edge and a gate driving circuit provided on the second edge.

The pad unit supplies a signal supplied from the outside to the pixel array unit and the gate driving circuit. For example, the pad portion may include a plurality of data pads connected to a plurality of data lines through a plurality of data link lines, and a plurality of gate pads connected to the gate driving circuit through gate control signal lines.

The gate driving circuit may be embedded or integrated in the first edge of the first substrate 110 so as to be connected one to one with a plurality of gate lines. In this case, the gate driving circuit may be a shift register including a transistor formed by the same process as the thin film transistor provided in the pixel region. In addition, the gate driving circuit may be configured by a GIP (Gate In Panel) method in which the display panel is embedded. For example, the non-display area may be a region where a gate driving circuit of the GIP scheme is formed. The gate driving circuit may be formed in one of the left region and the right region of the display region. Alternatively, the gate driving circuit may be composed of an integrated circuit and mounted on a COF (Chip On Film) and connected to a plurality of gate pads provided in the non-display region through the COF.

The first substrate 110 according to an exemplary embodiment may include a plurality of metal electrodes and a plurality of metal wirings. For example, the plurality of metal electrodes may be viewed as a gate electrode, a source electrode, a drain electrode, a pixel electrode connected to the thin film transistor, a common electrode adjacent to the pixel electrode, and the like included in the thin film transistor. The plurality of metal wirings can be seen as gate wirings, data wirings, power supply wirings, common wirings, etc. that connect the pad portion to the pixel array portion and the gate drive circuit.

The metal electrode and the metal wiring according to an exemplary embodiment may be formed of any one of iron, nickel, cobalt metal, or an alloy thereof. As described above, the vibration generating module 400 includes the magnet plate 407, and the magnet plate 407 can attract the metal electrode and the metal wiring through the attraction with the metal electrode and the metal wiring. At this time, since the metal electrode and the metal wiring can be made of any one of ferromagnetic iron, nickel, cobalt metal, or their alloys, they can be easily attracted by the magnetic force generated by the magnet plate 407. Thus, the display panel 100 can be pulled toward the backlight module 200 by the attraction force between the magnet plate, the metal electrode, and the metal wiring, and the display panel 100 and the backlight module 200 are brought into contact with each other, And the air gap AG provided between the backlight module 200 and the backlight module 200 can be reduced or eliminated.

The electronic apparatus according to the present application can form the magnet plate 407 as an electromagnet, so that it is possible to emphasize the implementation of the low sound and the high sound selectively. For example, as shown in Fig. 4, an electric signal can be supplied to the magnet plate 407 to maintain the air gap AG, and an electric signal (not shown) can be applied to the magnet plate 407 So that the air gap AG can be reduced. As shown in FIG. 5, as the air gap AG is reduced, a high sound pressure appears at a high sound pressure level. As shown in FIG. 4, as the air gap AG is maintained, , It can be emphasized that the bass performance is relatively low.

The second substrate 130 may be a color filter array substrate, and may include a black matrix having an opening region overlapping each pixel region formed on the first substrate 110, and a color filter formed in the opening region. The second substrate 130 may be bonded to the first substrate 110 with a liquid crystal layer interposed therebetween by a sealant.

The liquid crystal layer is formed between the first substrate 110 and the second substrate 130. In accordance with an electric field formed by a data voltage applied to the pixel electrode and a common voltage applied to the common electrode, And a liquid crystal in which the arrangement direction of the liquid crystal molecules is changed.

In addition, the display panel 100 according to the present example may include a first polarizing member 150 and a second polarizing member 170.

The first polarizing member 150 is attached to the back surface of the first substrate 110 to polarize light emitted from the backlight module 200 toward the first substrate 110 to a first polarization axis.

The second polarizing member 170 is attached to the front surface of the second substrate 130 to polarize the light transmitted through the second substrate 130 and emitted to the outside to a second polarizing axis different from the first polarizing axis.

In addition, the display panel 100 according to the present example may further include a side sealing member 190.

The side sealing member 190 may be formed to cover both sides and corners of the display panel 100 adjacent to the pad portion. The side sealing member 190 can prevent light leakage on the side surface of the display panel 100. [ The side sealing member 190 according to an exemplary embodiment may be formed of a silicone-based or ultraviolet (UV) curing sealant (or resin). If it is made of ultraviolet (UV) curing series sealant, the process time can be reduced. The side sealing member 190 may have a color of, for example, blue, red, cyan, or black. The side sealing member 190 may be made of a colored resin or a light blocking resin to prevent lateral light leakage.

A part of the upper surface of the side sealing member 190 according to an example may be covered by the first polarizing member 170. [ The first polarizing member 170 is extended from the outer surface of the first substrate 110 so as to cover a part of the front surface of the side sealing member 190 to cover the front surface of the side sealing member 190, And may include an extension 171 attached to the portion. The joint surface between the side sealing member 190 and the first substrate 110 is concealed by the extended portion 171 of the first polarizing member 170 and is not exposed to the front of the electronic device in which the viewer is located.

The display panel 100 according to the present embodiment is coupled to the rear cover 310 of the rear mechanism 300 via the side cover member 330. [ The side cover member 330 is interposed between the rear edge of the display panel 100 and the front edge of the rear cover 310 to seal between the display panel 100 and the rear cover 310, This prevents light emitted from the backlight module 200 to the display panel 100 from leaking to the outside through the side surface of the electronic device. Further, when the side cover member 330 is formed in the shape of a letter, a pad may be further disposed between the side cover member 330 and the display panel 100. The pad can include, but is not limited to, a one-sided tape, a foam pad, a double-sided tape, a double-sided foam tape, or an adhesive resin. The double-sided tape may be, for example, acryl based, but is not limited thereto. Other examples include urethane-based foam pads, elastic resins, and the like. It may be made of a material having elasticity that can be compressed to a certain extent, and may be made of polyurethane, polyolefin, and polyethylene, but is not limited thereto.

In an electronic device according to an example of the present application, a backlight module 200 according to an example includes a light guide member 210, a reflective sheet 230, and an optical sheet unit 250.

The light guide member 210 is disposed on the rear surface of the display panel 100 with the light incidence surface, and is supported by the vibration generating module 400. The light guide member 210 changes the traveling direction of the light incident from the light source module through the light incident surface to the display panel 100 side.

The light guide member 210 according to an exemplary embodiment may include a light transmitting plastic or glass material. For example, the light guide member 210 may be a sapphire glass or a gorilla glass, but is not limited thereto, and may be a glass usable for a light guide application.

The light guide member 210 according to an example further includes a plurality of optical patterns. For example, when the light guide member 210 is made of a light-transmitting plastic material, a plurality of optical patterns may be provided on the rear surface of the light guide member 210 in an engraved or embossed form. As another example, when the light guide member 210 is made of a glass material, a plurality of optical patterns are provided inside the light guide member 210. For example, each of the plurality of optical patterns may be provided inside the light guide member 210 adjacent to the back surface of the light guide member 210 by a laser patterning process. Each of the plurality of optical patterns scatters and refracts light incident through the light incidence surface to increase the light output efficiency of the light emitted in the front direction of the light guide member 210.

The light guide member 210 vibrates according to the elevation of the bobbin 404 included in the vibration generating module 410 to generate a negative pressure so that the display panel 100 vibrates.

The light source module for emitting light to the light incident surface of the light guide member 210 may include a plurality of light emitting diode elements mounted on the printed circuit board for the light source and irradiating light to the light incident surface of the light guide member 210 have.

Each of the plurality of light emitting diode elements may be mounted on a printed circuit board for a light source so as to be spaced apart from each other. Each of the plurality of light emitting diode elements may be spaced apart from the light entrance surface of the light guide member 210 by an optical gap and may be arranged to have a pitch (or interval) along the longitudinal direction of the light entrance surface provided in the light guide member 210 have. The printed circuit board for the light source may be a flexible printed circuit film.

The reflective sheet 230 is disposed to cover the rear surface of the light guide member 210. The reflection sheet 230 can minimize or prevent the back light leakage of the light guide member 210 by reflecting the light incident through the rear surface of the light guide member 210 toward the inside of the light guide member 210.

The reflective sheet 230 according to an exemplary embodiment is bonded to the rear surface of the light guide member 210 via the sheet joining member 240. As an example, the sheet joining member 240 may be a transparent optical adhesive or a transparent optical adhesive film, but is not limited thereto. For example, the sheet joining member may be optically clear adhesive (OCA), optically clear resin (OCR), porous optically clear adhesive (OCA), or porous optically clear resin (OCR).

The optical sheet unit 250 is disposed on the front surface of the light guide member 210 and improves the brightness characteristics of light emitted from the light guide member 210.

The optical sheet unit 250 may include a lower diffusion sheet, a lower prism sheet, and an upper prism sheet. However, the present invention is not limited thereto. For example, a diffusion sheet, a prism sheet, a dual brightness enhancement film, and a lenticular sheet Or may be composed of one or more lamination combinations selected, or may be composed of a single composite sheet having light diffusion and condensing functions. Herein, since the present invention outputs sound through the vibration of the display panel 100 interlocked with the vibration of the light guide member 210, the process of transmitting the vibration generated in the light guide member 210 to the display panel 100 It is preferable that the optical sheet unit 250 according to the present application is made of a single composite sheet having a light diffusion function and a light condensing function.

In addition, when the optical sheet portion 250 is composed of a plurality of optical sheets, a plurality of optical sheets can be bonded to each other by a laminating process using a sheet joining member. Here, the sheet joining member may be a transparent optical adhesive or a transparent optical adhesive film, but is not limited thereto. For example, the sheet joining member may be an optically clear adhesive (OCA), an optically clear resin (OCR), a porous optically clear adhesive (OCA), or a porous optically clear resin (OCR) It may be porous OCCR (porous optically clear adhesive) or porous OCR (porous optically clear resin) so that total internal reflection occurs.

The backlight module 200 according to this embodiment can be coupled to the front edge of the rear cover 310 through the module connecting member 500. For example, the module connecting member 500 may be disposed at the edge of the backlight module 200 and at the edge of the rear cover 310.

The module connecting member 500 is interposed between the rear edge of the backlight module 200 and the front edge of the rear cover 310 to support the rear edge of the backlight module 200 while the backlight module 200 and the rear cover 310 A gap space is provided.

The vibration generating module 400 is supported on the rear cover 310 and is inserted into the module insertion port 310h of the rear cover 310 so that the back surface of the backlight module 200, And is in contact with the rear surface. The bobbin 404 of the vibration generating module 400 is brought into contact with the rear surface of the reflective sheet 230 and is moved up and down according to the driving of the vibration generating module 400 to thereby move the backlight module 200 including the reflective sheet 230, Thereby generating a negative pressure. Accordingly, the display panel 100 vibrates according to the sound pressure generated by the backlight module 200 to generate sound, and the sound generated by the vibration of the display panel 100 is output to the front of the display panel 100 do.

In this example, the magnet plate 407 can reduce the air gap AG between the display panel 100 and the backlight module 200 to bring the display panel 100 and the backlight module 200 into contact with each other. For example, the first polarizing member 150 of the display panel 100 and the optical sheet portion 250 of the backlight module 200 may be in contact with each other.

As described above, since the electronic device according to the present application can reduce the air gap AG between the display panel 100 and the backlight module 200, the vibration of the high frequency band is easily transmitted to the display panel 100, Thus, the high-frequency implementation can be improved.

FIG. 6 is a rear view of an electronic device according to another example of the present application, and FIG. 7 is a schematic cross-sectional view of the line II-II 'shown in FIG. 6, And a structure of the vibration generating module. Hereinafter, only the coupling structure between the backlight module and the rear mechanism and the structure of the vibration generating module will be described, and redundant description of the remaining components will be omitted.

Referring to FIGS. 6 and 7, in the electronic apparatus according to the present application, the vibration generating module 400 includes first and second sound generating modules 400a and 400b.

The first sound generating module 400a is disposed in the rear left region LA of the backlight module 200. [ The first sound generating module 400a is connected to the rear left area LA of the backlight module 200 to vibrate the left area of the display panel through the rear left area of the backlight module 200. [

The second sound generating module 400b is disposed in the rear right region RA of the backlight module 200. [ The second sound generating module 400b is connected to the rear right area RA of the backlight module 200 to vibrate the left area of the display panel through the rear right area of the backlight module 200. [

Each of the first and second sound generating modules 400a and 400b includes a module frame 401, a magnetic circuit unit, and a damper 406 shown in FIG. 3, .

Each of the first and second sound generating modules 400a and 400b according to another example may include at least two sub-sound generating modules arranged in parallel and spaced apart from each other. The sub-sound generating module includes the module frame 401, the magnetic circuit unit, and the damper 406 shown in FIG. 3, and a duplicate description thereof will be omitted.

The electronic apparatus according to the present application may further include a partition member 550.

The partition member 550 can be divided into the left area LA and the right area RA by spatially dividing the back surface of the backlight module 200 into the left area LA and the right area RA together with the module connecting member 500 described above. RA) between the sound waves generated in each of them. For example, the partition member 550 is disposed on the back surface of the backlight module 200, which overlaps with the middle area between the first and second sound generating modules 400a and 400b, and is divided into a left area LA and a right area RA ). At this time, the module connecting member 500 surrounds the outer portions of the left area LA and the right area RA defined on the back surface of the backlight module 200, respectively. The left area LA and the right area RA defined on the back surface of the backlight module 200 are spatially separated by the module connecting member 500 and the partition member 550. [

A partition member 550 according to an example is interposed between the backlight module 200 and the rear cover 310. For example, the partition member 550 may include a one-sided tape, a foam pad, a double-sided tape, a double-sided foam tape, or an adhesive resin. At this time, the rear surface of the partition member 550 is adhered to the front surface of the rear cover 310, and the front surface of the partition member 550 can be adhered to the back surface of the backlight module 200 or in a non-adhesive form.

The partition member 550 separates sound between the first and second sound generating modules 400a and 400b so that a so-called 2.0 channel type sound is output from the display panel 100 according to the vibration of the display panel.

The electronic apparatus according to the present application uses a display panel 100 vibrating in conjunction with the vibration of the backlight module 200 as a diaphragm of an acoustic apparatus to generate a so-called 2.0 channel type sound not in the rear and the lower side of the display panel 100 By outputting forward, it is possible to transmit accurate sound, improve sound quality, and increase the immersion feeling of a viewer.

8 is a graph showing acoustic output characteristics of an electronic apparatus according to the present application and a comparative example. Graph A shows acoustic output characteristics of an electronic device according to the present application, and Graph B shows acoustic output characteristics of an electronic device according to a comparative example that does not include a magnet plate. In FIG. 8, the horizontal axis represents the frequency (Hz), and the vertical axis represents the sound pressure level (dB). Here, the acoustic output characteristic can be measured by the acoustic analysis equipment.

8, in the electronic device according to the comparative example, the vibration of the high frequency band is applied to the display panel 100 in accordance with the air gap AG between the display panel 100 and the backlight module 200, And the sound pressure in the high frequency band, for example, a sound pressure of 5000 Hz or more, is lowered.

Alternatively, the electronic apparatus according to the present application may reduce the air gap AG between the display panel 100 and the backlight module 200, as shown in the graph A, It is understood that the sound pressure in the high frequency band, for example, the sound pressure of 5000 Hz or more, is not lowered.

Therefore, the electronic apparatus according to the present application can reduce the air gap AG between the display panel 100 and the backlight module 200 through the magnet plate 407, thereby improving the sound pressure from the low sound range to the high sound range. It is possible to have an acoustic output characteristic, thereby outputting an improved sound from bass to treble.

Further, the sound generating module according to an example of the present application can be applied to an acoustic generating module disposed in a display device. A display device according to an exemplary embodiment of the present invention may be applied to a mobile device, a video phone, a smart watch, a watch phone, a wearable device, a foldable device, a rollable device, device, a bendable device, a flexible device, a curved device, an electronic organizer, an electronic book, a portable multimedia player (PMP), a personal digital assistant (PDA) Medical devices, desktop PCs, laptop PCs, netbook computers, workstations, navigation, vehicle navigation, vehicle displays, televisions, wall paper displays, A signage device, a game device, a notebook, a monitor, a camera, a camcorder, a home appliance, and the like. When applied to a mobile device, it can be applied to at least one of a receiver and a speaker.

An electronic apparatus according to an example of the present application includes a display panel for displaying an image, a backlight module disposed on a rear surface of the display panel with an air gap therebetween, a rear surface mechanism disposed on a rear surface of the backlight module, And at least one vibration generating module vibrates the backlight module while reducing the air gap.

In one example of the present application, at least one vibration generating module can reduce the air gap by magnetic force.

In one example of the present application, at least one vibration generating module may reduce the air gap through a magnetic field formed by an electrical signal.

In one example of the present application, at least one vibration generating module may include a magnet plate, and the magnet plate may reduce the air gap through a magnetic field formed by an electrical signal.

In one example of the present application, the display panel may include a metal electrode and a metal wiring, and the metal electrode and the metal wiring may be made of any one of iron, nickel, cobalt metal, or an alloy thereof.

In one example of the present application, the display panel may be in contact with the backlight module by at least one vibration generating module, and a pulling force acting between the metal electrode and the metal wiring.

In one example of the present application, a power supply device for supplying an electric signal to at least one vibration generating module may be further included.

In one example of the present application, a power supply device supplies an electric signal to at least one vibration generating module in accordance with a switching signal, and at least one vibration generating module can reduce an air gap through a magnetic field formed by an electric signal .

In one example of the present application, the rear mechanism may include a back cover having at least one module insertion port, which can be disposed on the back surface of the backlight module and into which a part of at least one vibration generating module is inserted, The module may be supported on the back cover and inserted into at least one module insertion port to contact the back surface of the backlight module.

In one example of the present application, at least one vibration generating module includes a module frame fixed to the rear cover so as to be partially inserted into the module insertion opening of the rear cover, a magnet and a center pole disposed in the module frame, a coil wound around the bobbin, A damper disposed between the bobbins, and a magnet plate for supporting the magnet and the center pole.

In one example of the present application, a module connecting member interposed between the edge of the backlight module and the edge of the rear cover may be further included.

In one example of the present application, a module connecting member interposed between the edge of the backlight module and the edge of the instrument of the back cover may be further included.

In one example of the present application, the backlight module includes a light guide member having a light incidence surface and disposed on the rear surface of the display panel, a reflective sheet disposed on the rear surface of the light guide member and in contact with the at least one vibration generating module, And a light source module for irradiating light to the light entrance surface of the light guide member, wherein the light guide member is vibrated by at least one vibration generating module, The vibration of the guide member can be received and vibrated.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of. Therefore, the scope of the present application is to be defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present application.

100: display panel 200: backlight module
210: light guide member 230: reflective sheet
300: rear mechanism 310: rear cover
330: side cover member 400: vibration generating module
500: module connection panel 550: partition member

Claims (13)

A display panel for displaying an image;
A backlight module disposed on a rear surface of the display panel with an air gap therebetween;
A rear surface mechanism disposed on a rear surface of the backlight module; And
And at least one vibration generating module disposed in the rear mechanism,
Wherein the at least one vibration generating module vibrates the backlight module while reducing the air gap. The method according to claim 1,
Wherein the at least one vibration generating module reduces the air gap by a magnetic force. 3. The method of claim 2,
Wherein the at least one vibration generating module reduces the air gap through a magnetic field formed by an electrical signal. The method of claim 3,
Wherein the at least one vibration generating module comprises a magnet plate,
Wherein the magnet plate reduces the air gap through a magnetic field formed by the electrical signal. The method according to claim 1,
Wherein the display panel includes a metal electrode and a metal wiring,
Wherein the metal electrode and the metal wiring are made of any one of iron, nickel, cobalt metal, or an alloy thereof. 6. The method of claim 5,
Wherein the display panel is in contact with the backlight module by a force acting between the at least one vibration generating module and the metal electrode and the metal wiring. The method according to claim 1,
Further comprising a power supply device for supplying an electric signal to said at least one vibration generating module. 8. The method of claim 7,
The power supply device supplies an electric signal to the at least one vibration generating module in accordance with a switching signal,
Wherein the at least one vibration generating module reduces the air gap through a magnetic field formed by the electrical signal. The method according to claim 1,
Wherein the back surface mechanism includes a back cover having at least one module insertion port which is disposed on a rear surface of the backlight module and into which a part of the at least one vibration generating module is inserted,
Wherein the at least one vibration generating module is supported by the rear cover and inserted into the at least one module insertion port to contact the back surface of the backlight module. 10. The method of claim 9,
Wherein the at least one vibration generating module comprises:
A module frame fixed to the rear cover to be partially inserted into a module insertion port of the rear cover;
A magnet and a center pole disposed in the module frame;
A bobbin provided around the center pole and disposed on a rear surface of the backlight module;
A coil wound around the bobbin;
A damper disposed between the module frame and the bobbin; And
And a magnet plate for supporting the magnet and the center pole. 10. The method of claim 9,
Further comprising a module connecting member interposed between an edge of the backlight module and an edge of the rear cover. The method according to claim 1,
Further comprising a module connecting member interposed between an edge of the backlight module and an edge of the rear mechanism. 13. The method according to any one of claims 1 to 12,
The backlight module includes:
A light guiding member disposed on a rear surface of the display panel with an incidence surface;
A reflective sheet disposed on a rear surface of the light guide member and in contact with the at least one vibration generating module;
An optical sheet portion disposed on a front surface of the light guide member; And
And a light source module for irradiating light to the light entrance surface of the light guide member,
Wherein the light guide member is vibrated by the at least one vibration generating module, and the display panel receives vibrations of the light guide member to vibrate.

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