KR20230129351A - Electronic apparatus - Google Patents

Abstract

The present application provides an electronic device that can be lightweight and slim while outputting sound to the front of the display panel through vibration of the display module. The electronic device according to the present application includes a display module that displays an image, and a display module. It includes a vibration generating device that vibrates, and the vibration generating device includes a vibration generating element and a vibration amplifying member that amplifies the vibration of the vibration generating element to vibrate the display module.

Description

Electronic device{ELECTRONIC APPARATUS}

This application relates to electronic devices.

In general, electronic devices such as televisions, monitors, laptop computers, smart phones, tablet computers, electronic pads, wearable devices, watch phones, portable information devices, navigation, or vehicle control display devices are display devices that display images and images. Includes an audio device for outputting sounds related to.

While recent electronic devices tend to have larger screens, demands for lighter and slimmer devices are increasing.

However, electronic devices have difficulty in reducing weight and miniaturization because they must have sufficient space to accommodate sound devices such as speakers for sound output. Additionally, the sound generated from the sound device built into the electronic device is output toward the back or side of the electronic device body rather than the front of the display panel, so it should not be directed toward the viewer (or user) watching the video from the front of the display panel. Therefore, there is a problem that hinders the immersion of viewers watching the video.

The technical task of this application is to provide an electronic device that can be lightweight and slim while outputting sound to the front of the display panel through vibration of the display module.

The electronic device according to the present application includes a display module that displays an image, and a vibration generating device that vibrates the display module. The vibration generating device includes a vibration generating element and a vibration generating device that amplifies the vibration of the vibration generating element to vibrate the display module. Includes a vibration amplification member.

The electronic device according to the present application includes a display module that displays an image, a vibration generating element that vibrates the display module, a vibration transmission member that transmits vibration of the vibration generating element to the display module, and a rotation axis disposed on the rear of the display module. .

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

In this application, by providing a vibration amplification member, the vibration displacement and frequency characteristics transmitted to the display module can be adjusted, the characteristics of low-frequency or high-frequency sound pressure can be improved, and the magnitude of the sound pressure can be increased.

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

1 is a cross-sectional view of an electronic device according to an example of the present application.
Figure 2 is a cross-sectional view showing the coupling structure of the vibration generating device according to an example of the present application.
Figure 3 is a cross-sectional view showing the coupling structure of a vibration generating device according to another example of the present application.
Figures 4 to 7 are plan views for explaining various examples of the vibration generating device shown in Figures 2 and 3.
Figure 8 is a graph showing acoustic characteristics according to the presence or absence of a vibration amplification member in an electronic device according to an example of the present application.

The advantages and features of the present application and methods for achieving them will become clear by referring to examples described in detail below along with the accompanying drawings. However, the present application is not limited to the examples disclosed below and will be implemented in various different forms, and only the examples of the present application are intended to ensure that the disclosure of the present application is complete and are within the scope of common knowledge in the technical field to which this application pertains. It is provided to fully inform those who have the scope of the invention, and this application is only defined by the scope of the claims.

The shape, size, ratio, angle, number, etc. disclosed in the drawings for explaining an example of the present application are illustrative, and the present application is not limited to the matters shown. Like reference numerals refer to like elements throughout the specification. Additionally, in describing the present application, if it is determined that a detailed description of related known technology may unnecessarily obscure the gist of the present application, the detailed description will be omitted.

When 'includes', 'has', 'consists of', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the plural is included unless specifically stated otherwise.

When interpreting a component, it is interpreted to include the margin of error even if there is no separate explicit description.

In the case of a description of a positional relationship, for example, if the positional relationship of two parts is described as 'on top', 'on the top', 'on the bottom', 'next to', etc., 'immediately' Alternatively, there may be one or more other parts placed between the two parts, unless 'directly' is used.

In the case of a description of a temporal relationship, for example, if a temporal relationship is described as 'after', 'successfully after', 'after', 'before', etc., 'immediately' or 'directly' Unless used, non-consecutive cases may also be included.

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

“First horizontal axis direction”, “second horizontal axis direction” and “vertical axis direction” should not be interpreted as only geometric relationships in which the relationship between each other is vertical, and the scope in which the configuration of the present application can function functionally It can mean having a broader 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, second, and third items” means each of the first, second, or third items, as well as two of the first, second, and third items. It can mean a combination of all items that can be presented from more than one.

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

Hereinafter, preferred examples of electronic devices according to the present application will be described in detail with reference to the attached drawings. In adding reference numerals to components in each drawing, identical components may have the same reference numerals as much as possible even if they are shown in different drawings.

1 is a cross-sectional view of an electronic device according to an example of the present application.

Referring to FIG. 1 , an electronic device according to an example of the present application may include a display module 100, a housing 300, and a vibration generating device 500.

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 one example may include a pixel array substrate having a pixel array composed of a plurality of pixels, and an encapsulation layer that encapsulates the pixel array.

Each of the plurality of pixels is provided in a pixel area defined by pixel driving lines. Additionally, 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 light emitting device from external shock and prevents moisture from penetrating into the light emitting device. Additionally, the encapsulation layer may be replaced with an encapsulation substrate attached to the pixel array substrate via a filler material 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 a touch electrode for sensing a user's touch on the display module 100. The touch electrode layer senses changes in capacitance of the touch electrode according to the 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 the 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. Additionally, the polarizing film 150 may be disposed between the encapsulation layer of the display panel 110 and the touch panel 130.

Additionally, 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, etc. from penetrating into the pixel array.

Additionally, 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 is provided to overlap each of the plurality of pixels and may include a color filter that transmits only the wavelength of the color set to each of the plurality of pixels.

The housing 300 surrounds one of the rear and sides of the display module 100. For example, the housing 300 may accommodate the display module 100 and surround the rear and sides of the display module 100. The housing 300 according to one example may include a housing bottom portion 310 and a housing side wall portion 330.

The housing bottom 310 is disposed at the rear of the display module 100 and covers the rear of the display module 100.

The housing side wall portion 330 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. The housing side wall portion 330 is vertically connected to each outer wall of the housing bottom portion 310. For example, the cross section between each outer wall of the housing side wall 330 and the housing bottom 310 may have a cross section in the shape of an “ㅓ” or “ㅏ” shape depending on the position of the cross section. The housing side wall portion 330 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.

The housing side wall portion 330 according to one example provides a storage space for storing the display module 100 on the front of the housing bottom 310 and drives the housing on the rear of the housing bottom 310. A circuit storage space can be provided for storing circuit configurations such as the circuit unit 600 and peripheral circuits of electronic devices including batteries.

The vibration generating device 500 is disposed on the rear of the display module 100, for example, on the rear of the display panel 110, and causes the display module 100 to vibrate according to a vibration drive signal, thereby causing vibration of the display panel 110. Accordingly, sound is output in the front direction (Z) of the display panel 110. The vibration generating device 500 according to one example may have a lever structure. The specific configuration for this will be described later.

The electronic device according to an example of the present application may further include a driving circuit unit 600, a cover window 700, and a rear cover 800.

The driving circuit unit 600 is disposed in a circuit storage space provided in the housing 300 and is connected to the display panel 110 and the vibration generating device 500. The driving circuit unit 600 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 and displays 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 in each pixel by supplying driving signals and data signals to the pixel driving lines.

The sound processing circuit generates an audio signal based on an audio source, amplifies the audio signal to generate a vibration drive signal, and vibrates the vibration generating device 500 according to the generated vibration drive signal.

The cover window 700 is coupled to the housing 300 and supports the display module 100. For example, the cover window 700 may be supported on the upper step portion 360 provided on the housing side wall portion 330 of the housing 300 while supporting the display module 100.

The cover window 700 according to one example may be made of glass or tempered glass material. For example, the cover window 700 may have either Sapphire Glass or Gorilla Glass or a bonded structure thereof. The cover window 700 may be attached to the front of the display module 100 using an optical adhesive member. At this time, the optical adhesive member may be OCA (Optically Clear Adhesive), OCR (Optically Clear Resin), or PSA (Pressure Sensitive Adhesive).

A buffering member 200 may be interposed between the cover window 700 and the upper step 360 provided on the housing side wall 330 of the housing 300. The cushioning member 200 may include double-sided tape or foam pad. The buffer member 200 cushions the impact applied to the cover window 700, prevents vibration of the display module 100 from being transmitted to the housing 300, and enables the display module 100 to vibrate.

The rear cover 800 is coupled to the housing 300 and covers the rear of the housing 300. For example, the rear cover 800 covers the circuit storage space provided at the rear of the housing 300.

The rear cover 800 according to one example may be coupled to the lower step portion 370 provided on the housing side wall portion 330 of the housing 300. For example, the rear cover 800 may be made of the same material as the cover window 700, or may be made of a different glass material than the cover window 700.

Figure 2 is a cross-sectional view showing the coupling structure of the vibration generating device according to an example of the present application. FIG. 2 specifically illustrates the vibration generating device 500 schematically shown in FIG. 1 , and descriptions overlapping with FIG. 1 will be omitted hereinafter.

Referring to FIG. 2 , the vibration generating device 500 according to an example of the present application includes a vibration amplifying member 510 and a vibration generating element 520.

The vibration amplifying member 510 is disposed on the rear side of the display panel 110. The vibration amplifying member 510 may vibrate the display panel 110 by amplifying the vibration of the vibration generating element 520. The vibration amplifying member 510 may be formed in a structure capable of seesaw movement, and may amplify the vibration generated from the vibration generating element 520 through the seesaw movement according to the vibration of the vibration generating element 520.

The vibration amplifying member 510 according to one example may include a vibration transmission member 511, a support 512, and a rotation shaft 513.

The vibration transmission member 511 is disposed on the rear side of the display panel 110. The vibration transmission member 511 may directly contact the back of the display panel 110 and transmit the vibration of the vibration generating element 520 to the display panel 110.

The vibration transmission member 511 may be formed of different materials depending on the rigidity of the display panel 110. For example, when the display panel 110 has high rigidity, the vibration transmission member 511 may be formed of a material with low rigidity. If the rigidity of the display panel 110 is high, the elasticity is low and the degree of freedom of vibration is not secured. If the degree of freedom of vibration is not secured, it is difficult to generate vibration to output sound in a low frequency band. To solve this, the vibration transmission member 511 can be formed of a material with low rigidity. If the vibration transmission member 511 is made of a material with low rigidity, it is easy to increase the vibration displacement of the display panel 110, and it is possible to output sound in a low frequency band.

In contrast, when the rigidity of the display panel 110 is low, the vibration transmission member 511 may be formed of a material with high rigidity. If the rigidity of the display panel 110 is small, the elasticity is good and the freedom of vibration is secured. Therefore, vibration for outputting sound in a low frequency band can be generated even if the vibration transmission member 511 is not made of a material with low rigidity. Since the higher the rigidity of the vibration transmission member 511, the better the vibration transmission ability, it may be advantageous to form it from a material with high rigidity when the degree of freedom of the display panel 110 is secured.

The support 512 is disposed on the rear of the display panel 110. The support 512 may support the vibration transmission member 511 and the vibration generating element 520. For example, the vibration transmission member 511 may be disposed on the left edge of the front of the support 512, and the vibration generating element 520 may be disposed on the right edge of the rear of the support 512. Here, the front of the support 512 can be viewed as a side facing the back of the display panel 110, and the back side can be viewed as a side opposite to the front. Since the vibration generated from the vibration generating element 520 is transmitted to the display panel 100 through the vibration generating member 511, the vibration generating element 520 is placed on the rear of the support 512 to be spaced apart from the display panel 110. The vibration transmission member 511 may be placed on the front of the support 512 so as to directly contact the display panel 110.

The vibration amplifying member 510 may be formed as a lever structure to amplify the vibration of the vibration generating element 520 through a seesaw movement. Accordingly, the vibration transmission member 511 is disposed on the left edge of the support 512, and the vibration generating element 520 is disposed on the right edge of the support 512. Here, the vibration transmission member 511 and the vibration generating element 520 need only be located on opposite sides of both edges, so the vibration transmission member 511 is disposed on the right edge of the support 512, and the vibration generating element 520 It may also be placed on the left edge of the support 512.

The vibration transmission member 511 and the vibration generating element 520 may be attached to the support 512 via an adhesive member. For example, the adhesive member may be a double-sided tape, or a natural curing adhesive. Here, the adhesive member may be made of a thermosetting adhesive or a photocuring adhesive, but in this case, the characteristics of the vibration generating module may be deteriorated due to the heat of the adhesive curing process, so it may be made of a double-sided tape or a naturally curing adhesive.

The rotation axis 513 is disposed on the rear side of the display panel 110. The rotation axis 513 may be disposed between the display panel 110 and the support 512. The rotation axis 513 may be formed in a triangular or cone-shaped structure, but is not limited thereto. Here, one vertex of the rotation axis 513 may be coupled to the support 512, and the surface opposite to one vertex of the rotation axis 513 may be coupled to the rear of the display panel 110. The rotation axis 513 may be formed of a material with high rigidity. For example, the rotation axis 513 may be made of metal or acrylic. Additionally, the rotation shaft 513 may be formed of a material with higher rigidity than the vibration transmission member 511. Additionally, the rotation axis 513 may be referred to as a pivot, but the term is not limited thereto.

The vibration amplifying member 510 may further include a damping member disposed between the rotation shaft 513 and the display panel 110. The damping member is provided between the rotation axis 513 and the display panel 110 to prevent them from being directly coupled. The damping member is provided between the rotation shaft 513 and the display panel 110 to prevent vibration transmitted to the display panel 110 through the rotation shaft 513. The vibration amplification member 510 vibrates the display panel 110 through the vibration transmission member 511. When vibration is transmitted to the display panel 110 through the rotation axis 513, vibration interference occurs and the display panel ( 110), noise may occur in the sound generated. Therefore, noise can be prevented from occurring by additionally providing a damping member between the rotation axis 513 and the display panel 110.

The vibration generating element 520 is disposed on the rear side of the display panel 110. For example, it is coupled to the support 512 disposed on the rear of the display panel 110. The vibration generating element 520 may be attached to the rear of the support 512 via an adhesive member.

The vibration generating element 520 according to one example may include a piezoelectric material layer having a piezoelectric effect, a first electrode disposed on the front side of the piezoelectric material layer, and a second electrode disposed on the back side of the piezoelectric material layer. You can. Here, since the vibration generating element 520 includes a piezoelectric material layer, it may be expressed as a piezoelectric element.

The piezoelectric material layer includes a piezoelectric material that generates vibration by an electric field. Here, the piezoelectric material generates a potential difference due to dielectric polarization due to changes in the relative positions of positive (+) ions and negative (-) ions while pressure or torsion phenomenon acts on the crystal structure due to external force, and conversely, according to the applied voltage. It has the characteristic of causing vibration due to an electric field.

The vibration generating element 520 according to one example may include a piezoelectric material made of a polymer material, a piezoelectric material made of a thin film material, a piezoelectric material made of a composite material, or a piezoelectric material made of a single crystal ceramic or a polycrystalline ceramic. In this application, the piezoelectric material of the polymer material may include polyvinylidene difluoride (PVDF), P(VDF-TrFe), or P(VDFTeFE). The piezoelectric material of the thin film material may include ZnO, CdS, or AlN. The piezoelectric material of the composite material may include PZT (lead zirconate titanate)-PVDF, PZT-Silicon Rubber, PZT-Epoxy, PZT-foamed polymer, or PZT-foamed urethane. The piezoelectric material of the single crystal ceramic may include α-AlPO4, α-SiO2, LiNbO3, Tb2(MoO4)3, Li2B4O7, or ZnO. The piezoelectric material of the polycrystalline ceramic may include PZT-based, PT-based, PZT-Complex Perovskite-based, or BaTiO3.

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

As described above, the electronic device according to an example of the present application is a display module according to the driving of the vibration generating device 500 including the vibration amplifying member 510 made of a lever structure and the vibration generating element 520 made of a piezoelectric material. (100), for example, when the display panel 110 vibrates, sound generated according to the vibration of the display panel 110 can be output toward the viewer (or user) watching the image from the front of the display panel 110. there is. Therefore, according to an example of the present application, the electronic device can increase the immersion of the viewer watching the video by outputting sound toward the viewer through the vibration of the display module 100 without a separate sound device or speaker, and can reduce the weight and /Or it can be slimmed down.

In addition, by providing a vibration amplifying member 510 capable of amplifying the vibration of the vibration generating element 520, the vibration displacement and frequency characteristics transmitted to the display panel 110 can be adjusted, and through this, low-frequency or high-frequency sound pressure The characteristics can be improved and the size of sound pressure can be increased. Here, the vibration amplifying member 510 supports the vibration transmission member 511 and the vibration generating element 520 with a support 512, and seesaws in the direction shown by the arrow around the rotation axis 513 to generate the vibration generating element ( The vibration generated in 520 can be amplified and transmitted to the display panel 110 through the vibration transmission member 511.

Figure 3 is a cross-sectional view showing the coupling structure of a vibration generating device according to another example of the present application. FIG. 3 shows a different formation position of the rotation axis 513 in FIG. 2, and descriptions overlapping with FIG. 2 will be omitted below.

Referring to FIG. 3, the rotation axis 513 is disposed between the support 512 and the housing 300. For example, it may be disposed at an angle between the support 512 and the bottom of the housing 310. The rotation axis 513 may be formed in a triangular structure. Here, one vertex of the rotation axis 513 may be coupled to the support 512, and the surface opposite to one vertex of the rotation axis 513 may be coupled to the front of the housing bottom 310. The rotation axis 513 may be formed of a material with high rigidity. For example, the rotation axis 513 may be made of metal or acrylic. Additionally, the rotation shaft 513 may be formed of a material with higher rigidity than the vibration transmission member 511.

The vibration generating device 500 according to one example can transmit vibration to the display panel 110 only through the vibration generating member 511, and thus can output sound of a desired frequency. When the rotation shaft 513 is coupled to the rear of the display panel 110, vibration is transmitted to the display panel 110 through the rotation shaft 513, which may cause vibration interference and generate noise. However, here, the rotation axis 513 is disposed between the support 512 and the housing bottom 310 and is spaced apart from the display panel 110, so that it does not vibrate the display panel 110 and prevents the generation of noise. You can.

Figures 4 to 7 are plan views for explaining various examples of the vibration generating device shown in Figures 2 and 3.

Referring to FIGS. 4 to 7 , the electronic device according to the present application can output sounds having various frequencies and sound pressures by varying the formation position and formation structure of the detailed configuration of the vibration generating device 500. Hereinafter, the different configurations and effects will be described by comparing each of the drawings shown in FIGS. 4 to 7.

Referring to Figure 4, the rotation axis 513 is disposed closer to the vibration transmission member 511 than the vibration generating element 520, and referring to Figure 5, the rotation axis 513 generates vibration more than the vibration transmission member 511. It is disposed adjacent to the element 520.

As shown in FIG. 4, if the rotation axis 513 is disposed adjacent to the vibration transmission member 511, it may be advantageous to improve sound in the high frequency band. The vibration transmission member 511 transmits vibration to the display panel 110 through vibration, and the vibration displacement of the vibration transmission member 511 is proportional to the distance between the vibration transmission member 511 and the rotation axis 513. Therefore, when the vibration transmission member 511 and the rotation shaft 513 are disposed adjacent to each other, the vibration displacement becomes small and the vibration speed becomes large. When the display panel 110 is vibrated at such a small vibration displacement and a large vibration speed, it is advantageous to output sound in a high frequency band from the display panel 110. Therefore, when the rigidity of the display panel 110 is low and is not good for generating high frequency sound pressure, the sound in the high frequency band can be improved by arranging the rotation shaft 513 and the vibration transmission member 511 adjacent to each other as shown in FIG. 4.

As shown in FIG. 5 , if the rotation axis 513 is disposed adjacent to the vibration generating element 520, it may be advantageous to improve sound in the low frequency band. The vibration transmission member 511 transmits vibration to the display panel 110 through vibration, and the vibration displacement of the vibration transmission member 511 is proportional to the distance between the vibration transmission member 511 and the rotation axis 513. Therefore, when the rotation axis 513 is disposed adjacent to the vibration generating element 520, the vibration displacement increases and the vibration speed decreases. When the display panel 110 is vibrated at such a small vibration displacement and a large vibration speed, it may be advantageous to output sound in a high frequency band from the display panel 110. Therefore, when the rigidity of the display panel 110 is high and is not good for generating low-frequency sound pressure, the sound in the low-frequency band can be improved by arranging the rotation shaft 513 and the vibration generating element 520 adjacent to each other as shown in FIG. 5.

Referring to FIGS. 6 and 7 , the vertical width W2 of the vibration generating element 520 is larger than the vertical width W1 of the vibration transmission member 511. Here, each of FIGS. 6 and 7 is a different configuration from each of FIGS. 4 and 5, and the effect of the different configuration is the same. Therefore, FIGS. 6 and 4 will be compared and described, and the description of FIG. 7 will be omitted.

Referring to FIG. 6, the vertical width W2 of the vibration generating element 520 is larger than the vertical width W1 of the vibration transmission member 511. For example, the vibration generating element 520 shown in FIG. 6 may be formed to have a larger area than the vibration generating element 520 shown in FIG. 4. Therefore, the area of the support 512 in the area supporting the vibration generating element 520 is formed to be larger than the area of the support 512 in the area supporting the vibration transmission member 511, and the support 512 is For example, it may be formed to have a trapezoidal planar shape.

The vibration generating device 500 according to the present application may be formed in a structure capable of seesaw movement. For example, a seesaw movement of the support 512 may occur around the rotation axis 513 disposed between the vibration generating element 520 and the vibration transmission member 511. At this time, the vertical width W2 of the vibration generating element 520 is larger than the vertical width W1 of the vibration transmitting member 511, and the area of the support 512 in the area where the vibration generating element 520 is disposed is the area of the support 512 that transmits vibration. The area where the member 511 is disposed is larger than the area of the support 512. Accordingly, the vibration generated in the vibration generating element 520 can be greatly amplified as it is transmitted from an area with a large area to an area with a small area.

For example, vibration generated from the vibration generating element 520 having a large area may be transmitted to the display panel 110 through the vibration transmission member 511 having a small area. At this time, as the vibration force is concentrated in a small area of the vibration transmission member 511, the vibration speed of the display panel 110 may increase, and as the vibration speed of the display panel 110 increases, the vibration speed of the display panel 110 may increase. The amount of sound pressure generated may increase. Therefore, the electronic device according to the present application can improve the problem of the vibration generating element 520 with low sound power due to its complex characteristics and increase the level of sound pressure.

Figure 8 is a graph showing acoustic characteristics according to the presence or absence of a vibration amplification member in an electronic device according to an example of the present application. In Figure 8, graph A represents the acoustic characteristics of an electronic device according to the present application with a vibration amplification member, and graph B represents the acoustic characteristics of a conventional electronic device without a vibration amplification member.

Referring to FIG. 8, it can be seen that the battery device, such as graph A, amplifies the vibration generated from the vibration generating element through a vibration amplification member, thereby increasing the sound pressure in all frequency bands overall compared to the electronic device, such as graph B. And, it can be seen that the sound pressure in the low frequency region has been particularly improved. For example, in the graph, you can see that the sound pressure in the low frequency band below 500Hz is more improved than the sound pressure in the high frequency band above 1000Hz. As described above, the sound pressure in the low frequency band can be improved by forming the vibration amplification member in a structure that is advantageous for improving low frequencies. Additionally, when the vibration amplification member is formed in a structure that is advantageous for improving high frequencies, the sound pressure in the high frequency region can be further improved.

As such, the electronic device according to the present application is provided with a vibration amplification member 510 capable of amplifying the vibration of the vibration generating element 520, thereby controlling the vibration displacement and frequency characteristics transmitted to the display panel 110. , Through this, the characteristics of low-frequency or high-frequency sound pressure can be improved and the size of the sound pressure can be increased.

Additionally, the sound generating device according to the embodiment of the present application can be applied to a sound generating device disposed on a display device. Display devices according to embodiments of the present specification include mobile devices, video phones, smart watches, watch phones, wearable devices, foldable devices, and rollable devices. 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, navigation, vehicle navigation, vehicle display, television, wallpaper display, laptop , can be applied to monitors, cameras, camcorders, and home appliances. And, when applied to a mobile device, it can be applied to at least one of a receiver and a speaker.

The features, structures, effects, etc. described in the examples of the present application described above are included in at least one example of the present application, and are not necessarily limited to only one example. Furthermore, the features, structures, effects, etc. exemplified in at least one example of the present application can be combined or modified for other examples by those skilled in the art to which the present application pertains. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present application.

In an example of the present application, the electronic device includes a display module that displays an image, and a vibration generator that vibrates the display module. The vibration generator vibrates the display module by amplifying the vibration of the vibration generator and the vibration generator. It may include a vibration amplifying member.

In an example of the present application, the vibration amplifying member may amplify the vibration of the vibration generating element through a seesaw movement according to the vibration of the vibration generating element.

In an example of the present application, the vibration amplification member includes a vibration transmission member that transmits the vibration of the vibration generation element to the display module, a support for supporting the vibration generation element and the vibration transmission member, and a rotation axis for supporting the support to enable seesaw movement. can do.

In an example of the present application, the rotation axis may be disposed between the display module and the support.

In an example of the present application, a housing surrounding the rear of the display module may be further included, and the rotation axis may be disposed between the support and the housing.

In an example of the present application, a damping member disposed between the rotation axis and the display module may be further included.

In an example of the present application, the rotation axis may be arranged to be closer to the vibration transmission member than to the vibration generating element.

In an example of the present application, the rotation axis may be arranged to be closer to the vibration generating element than to the vibration transmission member.

In an example of the present application, the vertical width of the vibration generating element may be larger than the vertical width of the vibration transmission member.

In one example of the present application, the support may have a trapezoidal planar shape.

The electronic device according to the present application may include a display module that displays an image, a vibration generating element that vibrates the display module, a vibration transmission member that transmits the vibration of the vibration generating element to the display module, and a rotation axis disposed on the rear of the display module. You can.

In an example of the present application, a support for supporting the vibration generating element and the vibration transmission member may be further included.

In one example of the present application, the rotation axis may be disposed between the display module and the support.

In an example of the present application, a housing surrounding the rear of the display module may be further included, and the rotation axis may be disposed between the support and the housing.

In an example of the present application, the rotation axis may be arranged to be closer to the vibration transmission member than to the vibration generating element.

In an example of the present application, the rotation axis may be arranged to be closer to the vibration generating element than to the vibration transmission member.

In an example of the present application, the vertical width of the vibration generating element may be larger than the vertical width of the vibration transmission member.

In one example of the present application, the support may have a trapezoidal planar shape.

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 the knowledge of. Therefore, the scope of the present application is indicated by the claims described later, and the meaning and scope of the claims and all changes or modified forms derived from the equivalent concept should be interpreted as being included in the scope of the present application.

100: display module 110: display panel
200: shock absorbing member 300: housing
310: Housing bottom 330: Housing side wall
500: Vibration generating device 510: Vibration amplification member
511: vibration transmission member 512: support
513: Rotating shaft 520: Vibration generating element
600: Driving circuit part 700: Cover window
800: Rear cover

Claims (17)

A display panel including a pixel array substrate having a pixel array composed of a plurality of pixels including a pixel circuit and a light emitting element, and an encapsulation layer on the pixel array substrate;
A vibration generating element on the rear of the display panel;
a vibration amplifying member connected between the display panel and the vibration generating element; and
Includes a housing surrounding the rear of the display panel,
The vibration generating element is spaced apart between the display panel and the housing. According to claim 1,
The light-emitting element of the display panel includes any one of an organic light-emitting layer, a quantum dot light-emitting layer, and a micro light-emitting diode. According to claim 1,
An electronic device wherein the vibration generating element is a piezoelectric element. According to claim 1,
The vibration amplifying member is configured to enable a seesaw movement to vibrate the display panel by amplifying the vibration of the vibration generating element. According to claim 1,
The vibration amplifying member is,
a vibration transmission member connected to the display panel;
a support supporting the vibration transmission member and the vibration generating element; and
The support includes a rotation axis that supports the seesaw movement,
The vibration transmission member is disposed on one front edge of the support,
An electronic device, wherein the vibration generating element is disposed on the other edge of the back of the support. According to claim 5,
The electronic device wherein the vibration transmission member is made of a material having a lower rigidity than that of the display panel. According to claim 5,
The electronic device wherein the vibration transmission member is made of a material having a higher rigidity than the rigidity of the display panel. According to claim 5,
The electronic device wherein the rotation axis is made of a material having higher rigidity than the vibration transmission member. According to claim 5,
The rotation axis is disposed between the display panel and the support. According to clause 9,
An electronic device wherein one vertex of the rotation axis is coupled to the support, and a surface opposite to the one vertex of the rotation axis is coupled to the display panel. According to claim 10,
The electronic device further includes a damping member disposed between the rotation axis and the display panel. According to claim 5,
The rotation axis is disposed between the support and the housing. According to claim 12,
An electronic device wherein one vertex of the rotation axis is coupled to the support, and a surface opposite to the one vertex of the rotation axis is coupled to the housing. According to claim 5,
The rotation axis is disposed to be closer to the vibration transmission member than to the vibration generating element. According to claim 5,
The electronic device wherein the rotation axis is disposed closer to the vibration generating element than to the vibration transmission member. According to claim 5,
An electronic device wherein the vertical width of the vibration generating element is larger than the vertical width of the vibration transmission member. According to claim 16,
The support is an electronic device having a trapezoidal planar shape.