KR20190068925A - Display apparatus - Google Patents

Abstract

According to the present application, a display apparatus comprises: a pixel array layer including a plurality of organic light emitting devices formed on a display substrate; an encapsulating layer surrounding the pixel array layer; a plurality of color filters disposed on the encapsulating layer and corresponding to each of the plurality of organic light emitting devices; and a vibration pattern disposed between each of the plurality of color filters. Thus, the display apparatus can output sound toward a front side of a display panel without having a separate vibration generating device.

Description

Display device {DISPLAY APPARATUS}

The present application relates to a display device.

[0002] Recently, as the information age has come to the information age, a display field for visually representing electrical information signals has been rapidly developed. In response to this, various display apparatuses having excellent performance such as thinning, light weight, Is being developed. Specific examples of such a display device include a liquid crystal display device, a field emission display device, and an organic light emitting display device.

Generally, the display device displays an image entirely on the display panel, but a separate speaker must be installed to provide sound. When the speaker is installed in the display device, the direction of the sound generated through the speaker is the side edge or the upper and lower edges of the display panel, not the front or back side of the display panel on which the image is displayed. There is a problem in that the viewer is prevented from being immersed in the image because the sound does not proceed.

When a speaker included in a set device such as a TV or the like is constituted, the speaker occupies a certain space, so that there arises a problem that the design and the space arrangement of the set device are restricted. In order to solve such a problem, a previous display device is provided with a vibration generating device for vibrating the display panel to output sound toward the front of the display panel, but it is difficult to realize a thin film type display device due to the size of the vibration generating device . In the case of the transparent display device, even if the vibration generating device is disposed on the rear surface of the display device, the vibration generating device may be visually recognized. In order to solve this problem, it is necessary to develop a display device capable of transparency without increasing the size of the display device.

Accordingly, the inventors of the present application recognized the above-mentioned problems, and various experiments were conducted to improve the sound quality of the sound when the image was viewed from the front of the display panel, . Through various experiments, it is possible to generate sound such that the direction of sound progresses to the front of the display panel, and a new structure of a display device capable of improving sound quality is realized.

The present invention has a technical problem of realizing a vibration pattern for vibrating a display panel by providing a vibration pattern including a piezoelectric material having a piezoelectric effect.

In the present application, the vibration pattern includes a light-shielding material for absorbing light and a piezoelectric material having a piezoelectric effect, thereby functioning as a vibration pattern for preventing light leakage and a vibration generating device for vibrating the display panel to output sound It is a technical task to perform the same at the same time.

In addition, the present invention provides a technical problem of outputting sound to the front of the display panel without providing a separate vibration generating device, because the vibration pattern acts as a vibration generating device.

A display device according to the present application includes a pixel array layer including a plurality of organic light emitting elements disposed on a substrate, an encapsulating layer surrounding the pixel array layer, a plurality of organic light emitting elements And a vibration pattern disposed between the color filter and the plurality of color filters.

Specific details of other examples are included in the detailed description and drawings.

The display device according to the present application has a vibration pattern including a piezoelectric material having a piezoelectric effect, thereby realizing a vibration pattern for vibrating the display panel.

The display device according to the present application is characterized in that the vibrating pattern includes a light-shielding material for absorbing light and a piezoelectric material having a piezoelectric effect, thereby functioning as a black matrix for preventing a light leakage phenomenon and a vibration generating device for vibrating the display panel to output sound Role can be performed at the same time.

The display device according to the present application can output sound to the front of the display panel without providing a separate vibration generating device because the vibration pattern serves as the vibration generating device.

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 plan view showing a display device according to an example of the present application.
FIG. 2 is a cross-sectional view taken along the line I-I 'shown in FIG. 1, in a display device according to an example of the present application.
Fig. 3 is a cross-sectional view taken along the line I-I 'shown in Fig. 1, in a display device according to another example of the present application.
4 is a diagram showing a configuration of a vibration pattern and a vibration control unit in a display device according to an example of the present application.
5 is a diagram showing acoustic output characteristics of a vibration pattern in a display device according to an example of the present application.
FIG. 6 is a diagram showing light transmittance of a vibration pattern in a display device according to an example of the present application. FIG.

Brief Description of the Drawings The advantages and features of the present application, and how to accomplish them, will become apparent upon reference to the following detailed description, taken in conjunction with the accompanying drawings. It will be understood, however, that the invention 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 embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art. Are provided to fully disclose the scope of the invention, and the invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, and the like described in the drawings for describing the example of the present application are illustrative, and thus the present invention 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. In the case where the term "including", "having", or "being done" is used in the present application, other parts may be added unless "~" is 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.

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. Therefore, the first component mentioned below may be the second component within the technical spirit of the present invention.

In describing the components of the present application, the terms first and second can be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

In the present application, the "display device" may include a display device such as a liquid crystal module (LCM) or an organic light emitting diode (OLED) module including a driving part for driving the display panel and the display panel . And other equipment such as notebook computers, televisions, computer monitors, automotive apparatus or other forms of vehicles, including complete products or final products including LCM, OLED modules, or a set electronic apparatus or set apparatus such as a mobile electronic apparatus such as a smart phone or an electronic pad.

Accordingly, the display device in the present application may include a narrow display device such as an LCM, an OLED module, etc., and a set device which is an application product including an LCM, an OLED module or the like, or a final consumer device.

In some cases, the LCM and the OLED module constituted by the display panel and the driving unit and the like may be represented by the narrow "display device", and the electronic device as the finished product including the LCM and the OLED module may be represented by the "set device" . For example, the display device of the consultation includes a display panel of liquid crystal (LCD) or organic light emitting (OLED) and a source PCB which is a control section for driving the display panel, and the set device is electrically connected to the source PCB, And a set PCB that is a set control unit that controls the entire system.

The display panel used in this example may be any type of display panel such as a liquid crystal display panel, an organic light emitting (OLED) display panel, and an electroluminescent display panel. The present invention is not limited to a specific display panel capable of generating sound by being vibrated by the sound generator. Further, the display panel used in the display device according to the example of the present invention is not limited to the shape and size of the display panel.

For example, when the display panel is a liquid crystal display panel, it includes a plurality of gate lines and data lines, and pixels formed at intersections of the gate lines and the data lines. An array substrate including a thin film transistor serving as a switching element for adjusting light transmittance in each pixel, an upper substrate including a color filter and / or a black matrix, and a liquid crystal layer formed between the array substrate and the upper substrate As shown in FIG.

When the display panel is an organic light emitting (OLED) display panel, it may include a plurality of gate lines, data lines, and pixels formed at intersections of the gate lines and the data lines. An array substrate including a thin film transistor which is a device for selectively applying a voltage to each pixel, an organic light emitting element (OLED) layer on the array substrate, and an encapsulating substrate Or an encapsulation substrate, or the like. The sealing substrate protects the thin film transistor, the organic light emitting element layer, and the like from external impact and can prevent water or oxygen from penetrating into the organic light emitting element layer. In addition, the layer formed on the array substrate may include an inorganic light emitting layer, for example, a nano-sized material layer or a quantum dot. Alternatively, the layer formed on the array substrate may comprise a micro light emitting diode.

The display panel may further include a backing such as a metal plate attached to the display panel. The present invention is not limited to the metal plate but may include other structures.

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, an example of the present application will be described with reference to the accompanying drawings and examples.

FIG. 1 is a plan view showing a display device according to an example of the present application, and FIG. 2 is a cross-sectional view taken along the line I-I 'shown in FIG. 1 in a display device according to an example of the present application.

1 and 2, a display device 100 includes a substrate 110, a pixel array layer 120, an encapsulation layer 130, a plurality of color filters 150, a buffer layer 160, 180, a window cover 190, a vibration pattern 200, a display driving circuit unit 310, and a scan driving circuit unit 320.

The substrate 110 is a base substrate, and may be a flexible substrate. For example, the substrate 110 may comprise a transparent polyimide material. Considering that a high temperature deposition process is performed on the substrate 110 made of polyimide, polyimide excellent in heat resistance that can withstand high temperatures can be used. The polyimide substrate 110 may be formed by curing a polyimide resin coated on a front surface of a sacrificial layer provided on a carrier glass substrate to a predetermined thickness. Here, the carrier glass substrate can be separated from the substrate 110 by the release of the sacrificial layer by the laser-releasing process. The sacrificial layer may be made of amorphous silicon (a-Si) or silicon nitride (SiNx).

According to one example, the substrate 110 may be a glass substrate. For example, the substrate 110 may include silicon oxide (SiO ₂ ) or aluminum oxide (Al ₂ O ₃ ) as a main component.

The substrate 110 may include a display area AA and a non-display area NA. The display area AA can be defined in the center portion of the substrate 110 as an area where an image is displayed. Here, the display area AA may correspond to the active area of the pixel array layer 120. [ For example, the display area AA may be composed of a plurality of pixels formed for each pixel region intersecting a plurality of gate lines and a plurality of data lines. Here, each of the plurality of pixels may be defined as a minimum unit area for emitting light.

The non-display area NA can be defined in an edge portion of the substrate 110 surrounding the display area AA as an area where no image is displayed.

The pixel array layer 120 includes a thin film transistor layer (TFTL) and a light emitting element layer (EDL). The thin film transistor layer TFTL may include a thin film transistor 121, a gate insulating film 122, an interlayer insulating film 123, a protective film 124, and a planarization layer 125.

The thin film transistor 121 may be provided in the display area AA on the substrate 110. [ The thin film transistor 121 may include an active layer ACL, a gate electrode GE, a drain electrode DE, and a source electrode SE.

The active layer (ACL) may be provided in the display area AA of the substrate 110. The active layer ACL may be arranged so as to overlap the gate electrode GE, the drain electrode DE and the source electrode SE. The active layer ACL may directly contact the drain electrode DE and the source electrode SE and face the gate electrode GE with the gate insulating film 122 therebetween. According to one example, a portion of the active layer (ACL) may consist of a semiconductor material that is not doped with a dopant, and another portion of the active layer (ACL) may be comprised of a dopant-doped semiconductor material.

The gate electrode GE may be provided on the gate insulating film 122. The gate electrode GE can overlap the central region of the active layer ACL with the gate insulating film 122 therebetween. For example, the gate electrode GE may be formed of a metal such as Mo, Al, Cr, Au, Ti, Ni, Ne, But is not limited to, a single layer or a multi-layer made of any one or an alloy thereof.

The drain electrode DE and the source electrode SE may be provided on the interlayer insulating film 123 so as to be spaced apart from each other. The drain electrode DE is in contact with one end of the active layer ACL through the first contact hole provided in the gate insulating film 122 and the interlayer insulating film 123 and the source electrode SE is in contact with the gate insulating film 122 and the interlayer insulating film 123. [ Can be in contact with the other end of the active layer (ACL) through the second contact hole provided in the active layer (123). The source electrode SE may directly contact the anode electrode AE of the organic light emitting element 126 through the third contact hole of the planarization layer 125. [

The gate insulating film 122 may be provided on the active layer ACL. For example, the gate insulating film 122 may be disposed on the active layer ACL and the substrate 110, and may isolate the active layer ACL from the gate electrode GE. The gate insulating layer 122 may be formed on the entire surface of the display area AA of the substrate 110 and may be removed to allow the active layer ACL and the drain electrode DE or the source electrode SE to contact each other. . For example, the gate insulating layer 122 may include a first contact hole through which the drain electrode DE passes and a second contact hole through which the source electrode SE penetrates. The gate insulating film 122 may be formed of an inorganic insulating material, for example, silicon dioxide (SiO ₂ ), silicon nitride (SiN x), and silicon oxynitride (SiON), or a multilayer thereof.

The interlayer insulating film 123 may be provided on the gate electrode GE. For example, the interlayer insulating film 123 may be an inorganic insulating material made of silicon dioxide (SiO2), a silicon nitride film (SiNx), a silicon oxynitride film (SiON), or a multilayer thereof, but is not limited thereto. The interlayer insulating film 123 may be removed so that the active layer ACL and the drain electrode DE or the source electrode SE are in contact with each other. For example, the interlayer insulating layer 123 may include a first contact hole through which the drain electrode DE penetrates and a second contact hole through which the source electrode SE penetrates. Here, each of the first contact hole and the second contact hole of the interlayer insulating film 123 may be connected to the first contact hole or the second contact hole of the gate insulating film 122.

The protective film 124 may be provided on the thin film transistor 121. For example, the protective film 124 may be formed to cover the source electrode SE, the drain electrode DE, and the data line to protect the thin film transistor 121. For example, the protective film 124 may be an inorganic insulating material composed of silicon dioxide (SiO ₂ ), a silicon nitride film (SiN x), and a silicon oxynitride film (SiON) or a multilayer thereof.

The planarization layer 125 may be provided on the protective film 124 to planarize the upper end of the thin film transistor 121. The planarization layer 125 may be removed to allow the anode electrode AE and the source electrode SE to contact each other. For example, the planarization layer 125 may include a third contact hole through which the anode electrode AE penetrates. According to one example, the planarization layer 125 may be formed of a resin such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, and a polyimide resin. Organic insulating material, but is not limited thereto.

The light emitting element layer (EDL) may include an organic light emitting element 126 and a bank 127.

The organic light emitting element 126 is provided on the planarization layer 125 and may be electrically connected to the thin film transistor 121. The organic light emitting element 126 may include an anode electrode AE, an organic light emitting layer EL, and a cathode electrode CE. In addition to the organic light emitting layer (EL), an inorganic light emitting layer or a micro light emitting diode may be included.

The anode electrode (AE) may be provided on the planarization layer (125). For example, the anode electrode AE may be disposed so as to overlap with the opening area OA of the organic light emitting element 126 defined by the bank 127. For example, The anode electrode AE may be in contact with the source electrode SE of the thin film transistor 121 through the third contact hole provided in the planarization layer 125. [ According to an example, the anode electrode AE may be formed of a transparent conductive material such as ITO, IZO, ZnO, or In ₂ O ₃ having a large work function value, thereby serving as an anode.

The organic light emitting layer EL may be provided on the anode electrode AE. According to an example, the organic light emitting layer EL can be realized in the form of an organic film that is common to all the pixels without being divided into the pixel regions. For example, the organic light emitting layer EL may be formed not only on the anode electrode AE but also on the bank 127. [ Here, the organic light emitting layer EL may include a hole transporting layer, an organic light emitting layer, and an electron transporting layer. Further, the organic light emitting layer (EL) may further include at least one functional layer for improving the luminous efficiency and lifetime of the light emitting layer.

The cathode electrode CE may be provided on the organic light emitting layer EL. For example, the cathode electrode CE can be realized in the form of an electrode common to all pixels without being divided into pixel regions. When a voltage is applied to the anode electrode AE and the cathode electrode CE, each of the holes and electrons moves to the light emitting layer through the hole transporting layer or the electron transporting layer, and they can combine with each other in the light emitting layer to emit light. The cathode electrode CE may function as a cathode of the organic light emitting element 126 and may be formed of an opaque metal material composed of Li, Ca, LiF / Ca, LiF / Al, Al, Mg, .

The banks 127 may be provided on the planarization layer 125. For example, the bank 127 may be provided between the adjacent anode electrodes AE to divide the anode electrode AE. Therefore, the bank 127 can define the opening area OA of the organic light emitting element 126 by electrically insulating the anode electrodes AE adjacent to each other. For example, the bank 127 may be formed of an organic insulating material such as a polyimide resin, an acrylic resin, or a benzocyclobutene (BCB). However, the present invention is not limited thereto.

The encapsulation layer 130 may surround the pixel array layer 120. Specifically, the sealing layer 130 may be provided on the entire top of the cathode electrode CE. The sealing layer 130 prevents penetration of water or the like that may flow from the outside, thereby preventing deterioration of the organic light emitting layer EL. According to one example, the sealing layer 130 may be made of a metal such as copper (Cu) and aluminum (Al), or an alloy thereof, but is not limited thereto and may be formed of various materials known in the art.

A plurality of color filters 150 may be formed on the encapsulation layer 130 and correspond to each of the plurality of organic light emitting elements 126. Specifically, the plurality of color filters 150 may be surrounded by the patterned vibration pattern 200 on the sealing layer 130. Each of the plurality of color filters 150 may be spaced apart from each other to correspond to each of the plurality of organic light emitting elements 126. Each of the plurality of color filters 150 may be disposed corresponding to each of the plurality of organic light emitting elements 126 to convert the color of the white light emitted from the organic light emitting element 126. For example, the plurality of color filters 150 may be composed of a red color filter, a green color filter, and a blue color filter. Thus, the red subpixel, the green subpixel, and the blue subpixel of the plurality of subpixels may include a plurality of color filters 150, and the white subpixels may be implemented without a color filter.

The buffer layer 160 may cover the plurality of color filters 150 and the vibration pattern, and may provide a plurality of color filters 150 and a flat surface on the vibration pattern. For example, the buffer layer 160 may be formed of a multi-layered structure in which at least one inorganic film of a silicon oxide film (SiOx), a silicon nitride film (SiNx), and a silicon oxynitride film (SiON) is stacked.

The window cover 190 may be adhered to the front surface of the buffer layer 160 via the cover bonding member 180. According to one example, the window cover 190 may be made of a plastic material, a metal material, or a glass material. The window cover 190 of the glass material may include a sapphire glass.

The vibration pattern 200 may be disposed between the plurality of color filters 150 on the sealing layer 130. For example, the vibration pattern 200 may be disposed between the color filters 150 adjacent to each other to define each of the plurality of color filters 150, OA). ≪ / RTI > The vibration pattern 200 may be patterned on the sealing layer 130 so as not to overlap with the opening area OA of the plurality of organic light emitting devices 126. Thus, the vibration pattern 200 can surround the opening area OA of each of the plurality of organic light emitting elements 126, and can block the light incident on the thin film transistor 121. [ The vibration pattern 200 prevents leakage of the light emitted from the organic light emitting element 126 to the non-display area NA, thereby preventing a decrease in the contrast ratio. Therefore, the vibration pattern 200 can improve the aperture ratio and transmittance of the pixel array layer 120, thereby reducing power consumption and improving luminance. The vibration pattern 200 prevents the light emitted from each of the plurality of organic light emitting devices 126 from being mixed with each other, thereby improving the light leakage and visibility drop phenomenon.

The vibration pattern 200 may include first and second electrodes 210 and 220 and a vibration layer 230. Each of the first and second electrodes 210 and 220 may be disposed between the plurality of color filters 150 on the sealing layer 130. According to an example, each of the first and second electrodes 210 and 220 is transparent and may be disposed on both sides of the vibration layer 230. For example, the first electrode 210 is interposed between the front surface of the sealing layer 130 and the rear surface of the vibration layer 230, and the second electrode 220 is interposed between the front surface of the vibration layer 230 And the rear surface of the buffer layer 160. Here, the second electrode 220 may face the first electrode 210 with the vibration layer 230 therebetween.

Each of the first and second electrodes 210 and 220 may receive a voltage from an external circuit. When a voltage is applied through the first and second electrodes 210 and 220, the vibration layer 230 can vibrate according to a magnetic field due to an inverse piezoelectric effect. Here, the voltage applied to the first and second electrodes 210 and 220 may correspond to the sound signal generated based on the sound data. According to one example, the display device 100 can control the sound signal provided to the first and second electrodes 210 and 220 to control the vibration (or the output of the sound SW) of the vibration pattern 200 And can output the sound SW to the front of the display device 100. [ Therefore, the display apparatus 100 can output the sound SW to the front of the display apparatus 100 without having a separate vibration generator, so that the viewers who watch the video by matching the generation positions of the video and the sound (SW) The degree of freedom of design of the display device 100 can be improved.

The display panel used in this example may be a transparent display panel. When applied to a transparent display panel, there is an effect that the vibration pattern is not visually recognized because the vibration pattern is disposed between the color filters.

According to an example, each of the first and second electrodes 210 and 220 may be integrally formed corresponding to the area of the vibration layer 230.

According to another example, the first electrode 210 may include a plurality of first electrodes 210 corresponding to each of a plurality of regions of the display device 100, and the second electrode 220 may include a plurality of first And a plurality of second electrodes 220 corresponding to each of the electrodes 210. Here, the pair of first and second electrodes 210 and 220 may correspond to each of a plurality of regions of the display device 100. [ The plurality of first and second electrodes 210 and 220 may be disposed as many as necessary to improve the acoustic characteristics of the display device 100. Each of the plurality of first and second electrodes 210 and 220 is spaced apart from each other and can be independently driven according to a frequency input (or a sound signal) corresponding to each of a plurality of areas of the display device 100. Each of the plurality of first and second electrodes 210 and 220 may or may not be provided with a frequency input to output a sound SW corresponding to an image of the display apparatus 100. For example, the display device may select the first and second electrodes 210 and 220 for outputting the sound SW corresponding to the image of the display device 100, and output the corresponding first and second electrodes 210 and 220 May provide frequency input. Therefore, since the vibration layer 230 can be driven corresponding to the sound source of the image, the sense of reality of the sound output from the sound source of the image can be improved.

The vibration layer 230 is sandwiched between the first and second electrodes 210 and 220 and vibrates according to a sound signal input from the first and second electrodes 210 and 220 to generate an acoustic wave SW in an audible frequency region, Can be output. The audio frequency may be, for example, 20 Hz to 20 kHz, but is not limited thereto. The vibration layer 230 prevents the light emitted from the organic light emitting element 126 from leaking into the non-display area NA or the light emitted from each of the plurality of organic light emitting elements 126 to be mixed with each other. have.

According to one example, the vibration layer 230 may include a light-shielding material for absorbing light and a piezoelectric material having a piezoelectric effect. Here, the piezoelectric effect refers to a property that an electric potential is generated by an external force when an external force is applied, and a deformation or a strain occurs when a voltage is applied. For example, the light shielding material may be composed of carbon black, titanium black, or a black pigment mixed therewith. The piezoelectric material may be selected from the group consisting of polyvinylidene fluoride homopolymer, polyvinylidene fluoride copolymer, PVDF terpolymer, cyano-polymer, But is not limited to, a piezopolymer comprising at least one of a cyano-copolymer, a boron nitride polymer (BN polymer). Here, the polyvinylidene fluoride copolymer (PVDF Copolymer) may be, for example, PVDF-TrFE, PVDF-TFE, PVDF-CTFE, PVDF-CFE and the like, but is not limited thereto. The polyvinylidene fluoride terpolymer may be PVDF-TrFe-CFE, PVDF-TrFE-CTFE or the like, but is not limited thereto. The cyano-copolymer may be PVDCN-vinyl acetate, PVDCN-vinyl propionate or the like, but is not limited thereto. And, the boron nitride polymer (BN polymer) may be polyaminoboran, polyaminodifluoroboran, and the like, but is not limited thereto.

According to an example, when the vibration layer 230 includes a light shielding material and a piezoelectric material, the vibration layer 230 may simultaneously perform a function of absorbing light and a function of outputting sound. Here, the vibration layer 230 may determine whether to perform the light absorbing function and the acoustic output function according to the composition ratio of the light shielding material and the piezoelectric material. For example, the lower the weight ratio of the light shielding material of the vibration layer 230 is, the more the light absorption function can not be performed properly, and the lower the weight ratio of the piezoelectric substance, the more the sound output function can not be performed properly. Therefore, the display device 100 according to the present application can disclose an embodiment of a light-shielding material and a piezoelectric material capable of simultaneously performing a light absorption function and an acoustic output function, And is not something that ordinary technicians can invent from the prior art through a simple design change.

According to one example, the vibration layer 230 may have a weight ratio of the piezoelectric material of 30% by weight or more. For example, when the vibration layer 230 includes a piezoelectric material and a light shielding material, if the weight ratio of the piezoelectric material is 30% by weight or more, the weight ratio of the light shielding material may be 70% by weight or less. For example, when the piezoelectric material is embodied as the above-mentioned piezoelectric material, if the weight ratio of the piezoelectric material is 30 wt%, the acoustic material similar to the piezoelectric material when the weight ratio of the piezoelectric material is 100 wt% Output characteristics. Accordingly, the vibration layer 230 includes a piezoelectric material of 30 wt% or more and a light-shielding material that occupies the remaining weight ratio, so that it can perform an excellent optical absorption function and an acoustic output function at the same time.

According to one example, the weight percentage of the light shielding material in the vibration layer 230 may be 50% by weight or more. Specifically, when the vibration layer 230 includes a piezoelectric material and a light shielding material, if the weight ratio of the light shielding material is 50% by weight or more, the weight ratio of the piezoelectric material may be 50% by weight or less. For example, when the light shielding material is composed of carbon black, titanium black or a black pigment mixed therewith, when the weight ratio of the light shielding material is 50 wt%, the weight ratio of the light shielding material is 100 wt% ). ≪ / RTI > Accordingly, the vibration layer 230 includes the piezoelectric material that occupies 50% by weight or more of the light-shielding material and the remaining weight ratio, so that it can perform the excellent optical absorption function and the sound output function at the same time.

According to one example, the vibrational layer 230 may comprise a light-shielding material, a piezoelectric material, and a photoresist composition. Accordingly, the vibration layer 230 can perform a light-absorbing function including a light-shielding material, perform a sound output function including a piezoelectric material, and include a photoresist composition, .

According to one example, the vibration layer 230 may have a weight ratio of the piezoelectric material of 10% by weight or more. For example, when the vibration layer 230 includes a piezoelectric material, a light shielding material, and a photoresist composition, if the weight ratio of the piezoelectric material is 10% by weight or more, the weight ratio of the light shielding material and the photoresist composition is 90% . For example, when the piezoelectric material is embodied as the above-mentioned piezoelectric material, if the weight ratio of the piezoelectric material is 10 wt%, the weight ratio of the piezoelectric material to the piezoelectric material is 100 wt% Output characteristics. Accordingly, the vibration layer 230 includes a light-shielding material and a photoresist composition that occupy at least 10% by weight of the piezoelectric material and the remaining weight ratio, and thus can perform an excellent optical absorption function and an acoustic output function at the same time.

According to one example, the weight percentage of the light shielding material in the vibration layer 230 may be 50% by weight or more. For example, when the vibration layer 230 includes a piezoelectric material, a light shielding material, and a photoresist composition, if the weight ratio of the light shielding material is 50% by weight or more, the weight ratio of the piezoelectric material and the photoresist composition is 50% . For example, when the light-shielding material is composed of carbon black, titanium black, or a black pigment mixed therewith, when the weight ratio of the light-shielding material is 50 wt%, the weight ratio of the light-shielding material is 100 wt% ). ≪ / RTI > Accordingly, the vibration layer 230 includes a piezoelectric material and a photoresist composition that occupy 50% by weight or more of the light-shielding material and the remaining weight ratio, and thus can perform an excellent optical absorption function and an acoustic output function at the same time.

According to one example, the vibrational layer 230 may be less than 30% by weight of the photoresist composition. For example, when the vibration layer 230 includes a piezoelectric material, a light shielding material, and a photoresist composition, if the weight ratio of the photoresist composition is less than 30% by weight, the weight ratio of the light shielding material and the piezoelectric material is more than 70% Lt; / RTI > For example, when the photoresist composition is implemented as a negative photoresist, the vibration pattern 200 may be patterned through an exposure patterning process even if the weight ratio of the photoresist composition is 25 wt%. Therefore, the vibration layer 230 can include both a light-shielding material and a piezoelectric material that occupy less than 30% by weight of the photoresist composition and the remaining weight ratio, and thus can perform an excellent optical absorption function and an acoustic output function simultaneously. Can be patterned.

The display driving circuit unit 310 may be connected to a pad unit provided in the non-display area NA of the substrate 110 to display an image corresponding to the image data supplied from the display driving system on each pixel. The display driving circuit unit 310 may include a plurality of circuit films 311, a plurality of data driving integrated circuits 313, a printed circuit board 315, and a timing control unit 317. [

The input terminals provided on one side of each of the plurality of circuit films 311 are attached to the printed circuit board 315 by a film adhering step and the output terminals provided on the other side of each of the plurality of circuit films 311 are adhered May be attached to the pad portion. According to one example, each of the plurality of circuit films 311 may be embodied as a flexible circuit film to reduce the bezel area of the display device 100, and may be bent to enclose the side surface of the window cover 190.

Each of the plurality of data driving integrated circuits 313 may be individually mounted on each of the plurality of circuit films 311. [ Each of the plurality of data driving integrated circuits 313 receives the pixel data and the data control signal provided from the timing controller 317 and converts the pixel data into an analog pixel data signal in accordance with the data control signal, It can be supplied to the data line. According to one example, each of the plurality of data driving ICs 313 may be disposed on the side surface of the window cover 190 according to the bending of the corresponding circuit film 311.

The printed circuit board 315 supports the timing control unit 317 and can transmit signals and power between the configurations of the display driving circuit unit 310. According to one example, the printed circuit board 315 may be disposed on the front surface of the window cover 190 according to the bending of the circuit film 311.

The timing controller 317 is mounted on the printed circuit board 315 and can receive the image data and the timing synchronization signal provided from the display drive system through the user connector provided on the printed circuit board 315. [ The timing controller 317 may generate pixel data by aligning the image data to be suitable for the pixel arrangement structure based on the timing synchronization signal, and may provide the generated pixel data to the corresponding data driving integrated circuit 313. The timing control unit 317 generates a data control signal and a scan control signal based on the timing synchronization signal, controls the driving timing of each of the plurality of data driving integrated circuits 313 through a data control signal, The driving timing of the scan driving circuit unit 320 can be controlled through the signal. Here, the scan control signal may be supplied to the corresponding scan driving circuit unit 320 through the first and / or last of the plurality of circuit films 311 and the non-display area NA of the substrate 110 .

The scan driving circuit portion 320 may be provided in the non-display area NA of the substrate 110. [ The scan driving circuit 320 generates a scan signal in accordance with the scan control signal provided from the display driving circuit 310 and supplies the scan signal to the scan line corresponding to the set sequence. According to an example, the scan driving circuit portion 320 may be formed in the non-display area NA of the substrate 110 together with the thin film transistor.

Fig. 3 is a cross-sectional view taken along the line I-I 'shown in Fig. 1, in a display device according to another example of the present application.

3, the display device 100 includes a substrate 110, a pixel array layer 120, an encapsulation layer 130, a filling layer 140, a plurality of color filters 150, a color filter substrate 170, A cover bonding member 180, and a window cover 190. [ Hereinafter, differences from the display device 100 shown in FIG. 2 will be mainly described, and the same configuration as the above-described configuration will be briefly described or omitted.

The filler layer 140 fills the space between the substrate 110 and the color filter substrate 170 and does not spread out of the display device 100 by the dam. The filling layer 140 may be disposed between the substrate 110 and the color filter substrate 170 to prevent light loss and increase the adhesion between the substrate 110 and the color filter substrate 170.

The plurality of color filters 150 are formed on the color filter substrate 170 and then the substrate 110 and the color filter substrate 170 are arranged such that each of the plurality of color filters 150 is formed on each of the plurality of organic light emitting elements 126 As shown in FIG. For example, a plurality of color filters 150 may be interposed between the filler layer 140 and the color filter substrate 170. The plurality of color filters 150 may be surrounded by the patterned vibration pattern 200 on the color filter substrate 170. Each of the plurality of color filters 150 may be spaced apart from each other to correspond to each of the plurality of organic light emitting elements 126. Each of the plurality of color filters 150 may be disposed corresponding to each of the plurality of organic light emitting elements 126 to convert the color of the white light emitted from the organic light emitting element 126. For example, the plurality of color filters 150 may be composed of a red color filter, a green color filter, and a blue color filter. Thus, the red subpixel, the green subpixel, and the blue subpixel of the plurality of subpixels may include a plurality of color filters 150, and the white subpixels may be implemented without a color filter.

The color filter substrate 170 may face the substrate 110 with the sealing layer 130 interposed therebetween. Specifically, the color filter substrate 170 may be provided on the entire top of the filling layer 140. [ For example, the color filter substrate 170 may have a plurality of color filters 150 and a vibration pattern 200 formed on the top of the color filter substrate 170, and then may be bonded to the substrate 110. The color filter substrate 170 may be disposed on the substrate 110 to block the thin film transistor 121 and the organic light emitting element 126 provided on the substrate 110 from external moisture and air, have. According to one example, the color filter substrate 170 is positioned to face the substrate 110, and the substrate 110 and the color filter substrate 170 may be bonded together by a sealing member disposed along the edge thereof. For example, the color filter substrate 170 may be a glass substrate or a plastic substrate.

The vibration pattern 200 may be patterned on the color filter substrate 170. The vibration pattern 200 may be overlapped with the bank 127 defining the opening area OA of the plurality of organic light emitting elements 126. [ For example, the vibration pattern 200 may be patterned and formed on the color filter substrate 170 so as not to overlap the opening area OA of the plurality of organic light emitting devices 126, and then the substrate 110 and the color filter substrate 170 The vibration pattern 200 may be disposed between the filler layer 140 and the color filter substrate 170. In this case, The vibration pattern 200 may be disposed between adjacent color filters 150 to divide each of the plurality of color filters 150. Thus, the vibration pattern 200 can surround the opening area OA of each of the plurality of organic light emitting elements 126, and can block the light incident on the thin film transistor 121. [ The vibration pattern 200 prevents leakage of the light emitted from the organic light emitting element 126 to the non-display area NA, thereby preventing a decrease in the contrast ratio. Therefore, the vibration pattern 200 can improve the aperture ratio and transmittance of the pixel array layer 120, thereby reducing power consumption and improving luminance. The vibration pattern 200 prevents the light emitted from each of the plurality of organic light emitting devices 126 from being mixed with each other, thereby improving the light leakage and visibility drop phenomenon.

The vibration pattern 200 may include first and second electrodes 210 and 220 and a vibration layer 230. Each of the first and second electrodes 210 and 220 may be disposed between the plurality of color filters 150 on the filling layer 140. According to an example, each of the first and second electrodes 210 and 220 is transparent and may be disposed on both sides of the vibration layer 230. For example, the first electrode 210 may be interposed between the sealing layer 130 and the vibration layer 230. The first electrode 210 is interposed between the front surface of the filling layer 140 and the rear surface of the vibration layer 230 and the second electrode 220 is interposed between the front surface of the vibration layer 230 and the front surface of the vibration layer 230. [ And the rear surface of the color filter substrate 170. Here, the second electrode 220 may face the first electrode 210 with the vibration layer 230 therebetween.

Each of the first and second electrodes 210 and 220 may receive a voltage from an external circuit. When a voltage is applied through the first and second electrodes 210 and 220, the vibration layer 230 can vibrate according to a magnetic field due to an inverse piezoelectric effect. Here, the voltage applied to the first and second electrodes 210 and 220 may correspond to the sound signal generated based on the sound data. According to one example, the display device 100 can control the sound signal provided to the first and second electrodes 210 and 220 to control the vibration (or the output of the sound SW) of the vibration pattern 200 And can output the sound SW to the front of the display device 100. [ Therefore, the display apparatus 100 can output the sound SW to the front of the display apparatus 100 without having a separate vibration generator, so that the viewers who watch the video by matching the generation positions of the video and the sound (SW) The degree of freedom of design of the display device 100 can be improved. In addition, when applied to a transparent display device, there is an effect that a vibration pattern is not visually recognized.

The vibration layer 230 is sandwiched between the first and second electrodes 210 and 220 and vibrates according to a sound signal input from the first and second electrodes 210 and 220 to generate an acoustic wave SW in an audible frequency region, Can be output. The vibration layer 230 prevents the light emitted from the organic light emitting element 126 from leaking into the non-display area NA or the light emitted from each of the plurality of organic light emitting elements 126 to be mixed with each other. have.

According to one example, the vibration layer 230 may include a light-shielding material for absorbing light and a piezoelectric material having a piezoelectric effect. Here, the piezoelectric effect refers to a property that an electric potential is generated by an external force when an external force is applied, and a deformation or a strain occurs when a voltage is applied. For example, the light shielding material may be composed of carbon black, titanium black, or a black pigment mixed therewith. The piezoelectric material may be selected from the group consisting of polyvinylidene fluoride homopolymer, polyvinylidene fluoride copolymer, PVDF terpolymer, cyano-polymer, But is not limited to, a piezopolymer comprising at least one of a cyano-copolymer, a boron nitride polymer (BN polymer). Here, the polyvinylidene fluoride copolymer (PVDF Copolymer) may be, for example, PVDF-TrFE, PVDF-TFE, PVDF-CTFE, PVDF-CFE and the like, but is not limited thereto. The polyvinylidene fluoride terpolymer may be PVDF-TrFe-CFE, PVDF-TrFE-CTFE or the like, but is not limited thereto. The cyano-copolymer may be PVDCN-vinyl acetate, PVDCN-vinyl propionate or the like, but is not limited thereto. And, the boron nitride polymer (BN polymer) may be polyaminoboran, polyaminodifluoroboran, and the like, but is not limited thereto.

4 is a diagram showing a configuration of a vibration pattern and a vibration control unit in a display device according to an example of the present application.

Referring to FIG. 4, the vibration pattern 200 may include first and second electrodes 210 and 220 and a vibration layer 230. Each of the first and second electrodes 210 and 220 may receive a voltage from the vibration control unit 330. When a voltage is applied through the first and second electrodes 210 and 220, the vibration layer 230 can vibrate according to a magnetic field due to an inverse piezoelectric effect. Here, the voltage applied to the first and second electrodes 210 and 220 may correspond to the sound signal generated based on the sound data.

The vibration layer 230 is sandwiched between the first and second electrodes 210 and 220 and vibrates according to a sound signal input from the first and second electrodes 210 and 220 to generate an acoustic wave SW in an audible frequency region, Can be output.

The display device 100 may further include a vibration controller 330 for providing a frequency input (or a sound signal) to the first and second electrodes 210 and 220. According to an example, the vibration control unit 330 may be connected to each of the first and second electrodes 210 and 220 to provide a frequency input, and the vibration layer 230 may output sound SW.

The first electrode 210 may include a plurality of first electrodes 210 and the second electrode 220 may include a plurality of second electrodes 220 corresponding to the plurality of first electrodes 210, The vibration control unit 330 may include a pair of first and second electrodes 210 and 220 disposed on the plurality of regions of the display panel 100 based on the image to be displayed on the display panel 100, ) Can be selectively controlled. The vibration control unit 330 selects a pair of first and second electrodes 210 and 220 for outputting sound corresponding to the image of the display panel 100 and outputs the selected pair of first and second electrodes 210 And 220 to provide a frequency input such that sound corresponding to the image is output in the vibration pattern 200 of the corresponding region.

The vibration control unit 330 may include a control unit and a driving unit. The control unit may extract sound data and sound position data based on the image input data displayed on the display panel 100. [ Here, the sound data includes frequency band information of the sound, and the acoustic position data may include position information of the sound source in the image of the display panel 100. [ The driving unit generates a sound signal based on the sound data and outputs a sound signal to a pair of first and second electrodes 210 and 220 corresponding to the sound position data among the first and second electrodes 210 and 220, Can be supplied.

5 is a diagram showing acoustic output characteristics of a vibration pattern in a display device according to an example of the present application. Here, the first structure (Structure 1) represents a general piezopolymer and the second structure (Structure 2) comprises 20% by weight of piezoelectric material, 55% by weight of light-shielding material, and 25% The vibration pattern 200 having the vibration layer 230 formed by combining the photoresist composition of FIG.

Referring to FIG. 5, the vibration layer 230 of the vibration pattern 200 may include a light-shielding material, a piezoelectric material, and a photoresist composition. The vibration layer 230 may include a light shielding material to perform a light absorbing function, may include a piezoelectric material to perform an acoustic output function, and may be exposed and patterned on the sealing layer 130, have.

According to one example, the vibration layer 230 may have a weight ratio of the piezoelectric material of 10% by weight or more, a weight ratio of the light shielding material of 50% by weight or more, and a weight ratio of the photoresist composition of less than 30% by weight. For example, the vibration layer 230 may be formed by combining 20% by weight of a piezoelectric material, 55% by weight of a light shielding material, and 25% by weight of a photoresist composition. Therefore, it can be seen that the acoustic output characteristic of the vibration pattern 200 according to the present application is similar to the acoustic output characteristic of a general piezoelectric polymer as shown in FIG. As a result, when the vibration layer 230 is formed by combining 20% by weight of the piezoelectric material, 55% by weight of the light shielding material, and 25% by weight of the photoresist composition, it is possible to simultaneously perform excellent optical absorption and sound output functions have.

FIG. 6 is a diagram showing light transmittance of a vibration pattern in a display device according to an example of the present application. FIG. Specifically, FIG. 6A shows the light transmittance of a general black matrix, and FIG. 6B shows a graph of the transmittance of a black matrix in accordance with the present invention, in combination with 20 wt.% Piezoelectric material, 55 wt.% Light shielding material, and 25 wt.% Photoresist composition And shows the light transmittance of the vibration pattern 200 having the formed vibration layer 230.

6A and 6B, the vibration layer 230 of the vibration pattern 200 may include a light shielding material, a piezoelectric material, and a photoresist composition. It is noted that the vibration layer 230 may include a light shielding material to perform a light absorption function, and may include a piezoelectric material to perform an acoustic output function. Therefore, it can be seen that the light transmittance of the present application shows substantially similar light transmittance as compared with the light transmittance of a general black matrix. Table 1 below shows the optical density of a general Black Matrix (Structure 1) and the optical density of a vibration pattern 200 (Sturcture 2) according to the present application.

Structure 1 Structure 2 Optical Density 4.646 3.229

Here, the optical density (OD) is a logarithmic value of incident light (I ₀ ) with respect to the transmitted light (I) when light is transmitted through a substance as described below.

Therefore, when the same incident light (I ₀ ) is transmitted through a certain substance, the optical density becomes higher as the transmitted light (I) passing through the substance is smaller. It can be seen that the optical density of the vibration pattern 200 according to the present application does not largely differ from the optical density of a general black matrix, as shown in Table 1, and sufficiently performs the light absorbing function.

As described above, the display device according to the present application is characterized in that the vibration pattern 200 includes a light-shielding material for absorbing light and a piezoelectric material having a piezoelectric effect, thereby functioning as a black matrix for preventing light leakage, And can output sound to the front of the display panel without providing a separate vibration generating device.

A display panel used in a display device according to an exemplary embodiment of the present invention includes a liquid crystal display panel, an organic light emitting (OLED) display panel, a quantum dot display panel, and an electroluminescent display panel electroluminescent display panel, and the like are not limited to a specific display panel capable of generating sound by being vibrated by the vibration generating device of the present application. The display device of the embodiment of the present application can be applied to a display panel including an organic light emitting layer, a quantum dot light emitting layer, and a micro light emitting diode.

The vibration pattern according to the embodiment of the present application can be applied to 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, a portable display device, a curved device, an electronic notebook, an electronic book, a portable multimedia player (PMP), a PDA (personal digital assistant) personal digital assistant, MP3 player, mobile medical device, desktop PC, laptop PC, netbook computer, portable computer, workstation, navigation, , A vehicle display device, a television, a wall paper, a signage device, a game device, a lighting device, a notebook, a monitor, a camera, a camcorder, and a household appliance.

A display device according to an embodiment of the present application can be described as follows.

A display device according to the present application includes a pixel array layer including a plurality of organic light emitting elements disposed on a substrate, an encapsulating layer surrounding the pixel array layer, a plurality of organic light emitting elements A color filter, and a vibration pattern disposed between the plurality of color filters.

According to some embodiments of the present application, the vibration pattern may include a vibration layer that outputs sound through vibration, and first and second electrodes that are disposed on each of the top and bottom of the vibration layer to apply a vibration signal to the vibration layer.

According to some embodiments of the present application, the first electrode is sandwiched between the encapsulation layer and the vibrating layer, and the second electrode can face the first electrode with the vibrating layer sandwiched therebetween.

According to some embodiments of the present application, the vibration pattern may be disposed on the sealing layer in a region that does not overlap the opening regions of the plurality of organic light emitting elements.

According to some embodiments of the present application, the apparatus further comprises a color filter substrate facing the substrate with an encapsulating layer interposed therebetween, wherein a first electrode is sandwiched between the encapsulating layer and the vibrating layer, Can be interposed between the substrates.

According to some embodiments of the present application, the vibration pattern may be disposed on an area of the color filter substrate that does not overlap the opening areas of the plurality of organic light emitting elements.

According to some embodiments of the present application, the vibrating layer may comprise a light-shielding material that absorbs light, and a piezoelectric material.

According to some embodiments of the present application, the vibrating layer may have a weight ratio of the piezoelectric material of 30% by weight or more.

According to some embodiments of the present application, the vibrating layer may further comprise a photoresist composition.

According to some embodiments of the present application, the vibration layer may have a weight ratio of the light shielding material of 50 wt% or more.

According to some embodiments of the present application, the vibrating layer may have a weight ratio of the piezoelectric material of 10% by weight or more.

According to some embodiments of the present application, the vibrating layer may have a weight ratio of the photoresist composition of less than 30% by weight.

According to some embodiments of the present application, the light shielding material may be composed of carbon black, titanium black, or a black pigment mixed therewith.

According to some embodiments of the present application, the piezoelectric material is selected from the group consisting of polyvinylidene fluoride homopolymer, polyvinylidene fluoride copolymer, PVDF terpolymer, And a piezopolymer comprising at least one of a polymer, a cyano-polymer, a cyano-copolymer, and a boron nitride polymer.

According to some embodiments of the present application, the pixel array layer includes a plurality of thin film transistors disposed on a display region of a substrate, a planarization layer disposed on the plurality of thin film transistors, a plurality of thin film transistors disposed on the planarization layer, A plurality of electrically connected organic light emitting elements, and a bank disposed between the plurality of organic light emitting elements.

According to some embodiments of the present application, the vibration pattern may overlap the bank.

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 device
110: substrate 120: pixel array layer
130: sealing layer 140: filling layer
150: plurality of color filters 160: buffer layer
170: Color filter substrate 180: Covering member
190: window cover
200: vibration pattern 210, 220: first and second electrodes
230: vibrating layer 310: display driving circuit part
320: scan drive circuit unit 330:

Claims (16)

A pixel array layer including a plurality of organic light emitting elements disposed on a substrate;
An encapsulation layer surrounding the pixel array layer;
A plurality of color filters disposed on the sealing layer and corresponding to each of the plurality of organic light emitting elements; And
And a vibration pattern disposed between the plurality of color filters. The method according to claim 1,
The vibration pattern
A vibration layer for outputting sound through vibration; And
And first and second electrodes disposed on the upper and lower ends of the vibrating layer to apply a vibration signal to the vibrating layer. 3. The method of claim 2,
Wherein the first electrode is interposed between the sealing layer and the vibration layer,
And the second electrode faces the first electrode with the vibration layer interposed therebetween. The method of claim 3,
Wherein the vibration pattern is disposed on an area of the sealing layer that is not overlapped with the opening area of the plurality of organic light emitting elements. 3. The method of claim 2,
Further comprising a color filter substrate facing the substrate with the sealing layer interposed therebetween,
Wherein the first electrode is interposed between the sealing layer and the vibration layer,
And the second electrode is sandwiched between the vibrating layer and the color filter substrate. 6. The method of claim 5,
Wherein the vibration pattern is disposed on an area of the color filter substrate that does not overlap an opening area of the plurality of organic light emitting elements. 3. The method of claim 2,
The vibration layer
A light-shielding material which absorbs light; And
And a piezoelectric material. 8. The method of claim 7,
Wherein the vibration layer has a weight ratio of the piezoelectric material of 30 wt% or more. 8. The method of claim 7,
Wherein the vibrating layer further comprises a photoresist composition. 10. The method according to claim 7 or 9,
Wherein the vibration layer has a weight ratio of the light shielding material of 50 wt% or more. 10. The method of claim 9,
Wherein the vibrating layer has a weight ratio of the piezoelectric material of 10% by weight or more. 10. The method of claim 9,
Wherein the vibrating layer has a weight ratio of the photoresist composition of less than 30% by weight. 8. The method of claim 7,
Wherein the light shielding material comprises carbon black, titanium black, or a black pigment mixed therewith. 8. The method of claim 7,
The piezoelectric material may be selected from the group consisting of polyvinylidene fluoride homopolymer, polyvinylidene fluoride copolymer, PVDF terpolymer, cyano-polymer, Wherein the display device comprises a piezopolymer comprising at least one of a cyano-copolymer, a boron nitride polymer (BN polymer). The method according to claim 1,
Wherein the pixel array layer comprises:
A plurality of thin film transistors arranged on a display region of the substrate;
A planarization layer disposed on the plurality of thin film transistors;
A plurality of organic light emitting devices disposed on the planarization layer and electrically connected to each of the plurality of thin film transistors; And
And a bank disposed between the plurality of organic light emitting elements. 16. The method of claim 15,
Wherein the vibration pattern overlaps with the bank.

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