Display device

Abstract

This display device includes a metal layer, a multi-functional layer, an adhesive layer, a display substrate, a printed circuit board, and a conductive connection part. The multi-functional layer is disposed on the metal layer and includes graphite and a resin mixed with the graphite. The adhesive layer is disposed on the multi-functional layer. The display substrate is disposed on the adhesive layer. The conductive connection part directly connects a first surface of the printed circuit board and the bottom surface of the metal layer.

Description

display device

[0001] The present invention relates to a display device, and more particularly, to a display device including a multi-functional member that performs heat dissipation, electromagnetic interference (EMI) shielding, and electrostatic discharge (ESD) shielding.

[0002] Typically, a display device includes a display panel and a display panel driver. The display panel displays an image based on an input image and includes a plurality of gate lines, a plurality of data lines, and a plurality of pixels. The display panel driver includes a gate driver that provides a gate signal to the plurality of gate lines, a data driver that provides a data voltage to the data lines, and a drive control unit that controls the operations of the gate driver and the data driver.

[0003] The display device may generate heat during operation. Failure to properly dissipate heat may result in overheating and damage. Typically, in the case of OLED self-luminous displays, the current for light emission is transmitted to the organic EL diode, generating heat. This heat can cause deterioration, such as burn-in, of the EL material, reducing image quality. Furthermore, if this heat comes into contact with the human body on the front of the display, it can cause damage, such as burns.

[0004] Additionally, the display device may generate electromagnetic waves during operation. If the electromagnetic waves are not properly shielded and the user is exposed to them for a long period of time, there is a risk of health problems occurring. Furthermore, the display device may generate static electricity during operation. If the static electricity is not properly shielded, the display device may malfunction or be damaged.

[0005] Accordingly, the technical problem of the present invention is conceived from this point, and the purpose of the present invention is to provide a display device including a multi-function member that performs heat dissipation, electromagnetic interference (EMI) shielding, electrostatic discharge (ESD) shielding, backlight blocking, and absorption of shock coming from the outside of the display device.

[0006] According to one embodiment of the present invention, a display device includes a metal layer, a multi-functional layer, an adhesive layer, a display substrate, a printed circuit board, and a conductive connecting portion. The multi-functional layer is disposed on the metal layer and includes graphite and a resin mixed with the graphite. The adhesive layer is disposed on the multi-functional layer. The display substrate is disposed on the adhesive layer. The conductive connecting portion directly connects a first surface of the printed circuit board and a lower surface of the metal layer.

[0007] In one embodiment of the present invention, the mass ratio of the graphite in the multi-functional layer may be 30 wt% to 90 wt%, and the mass ratio of the resin in the multi-functional layer may be 70 wt% to 10 wt%.

[0008] In one embodiment of the present invention, the width of the multi-functional layer in the cross-sectional view may be the same as the width of the adhesive layer.

[0009] In one embodiment of the present invention, the multi-functional layer may be an anisotropic heat dissipation member, and the metal layer may be an isotropic heat dissipation member.

[0010] In one embodiment of the present invention, the multi-functional layer and the metal layer can be in direct contact.

[0011] In one embodiment of the present invention, the display device may further include a first anisotropic conductive film disposed on the display substrate, a second anisotropic conductive film disposed on a second surface of the printed circuit board, and a flexible film in contact with the first anisotropic conductive film and the second anisotropic conductive film.

[0012] In one embodiment of the present invention, the display device may further include a first driving circuit portion disposed on the flexible film and a second driving circuit portion disposed on the second surface of the printed circuit board.

[0013] In one embodiment of the present invention, the width of the conductive connection portion in the cross-sectional view may be the same as the width of the printed circuit board.

[0014] In one embodiment of the present invention, the width of the conductive connection portion in the cross-sectional view may be smaller than the width of the printed circuit board.

[0015] In one embodiment of the present invention, the conductive connecting portion may be formed integrally with the metal layer.

[0016] In one embodiment of the present invention, the conductive connecting portion may be a pin of the printed circuit board protruding from the printed circuit board.

[0017] In one embodiment of the present invention, the display device may further include a metal electrode that contacts the lower surface of the metal layer.

[0018] In one embodiment of the present invention, the metal electrode can be connected to ground.

[0019] In one embodiment of the present invention, the metal electrode can be connected to a power voltage line of the display device.

[0020] In one embodiment of the present invention, the display device may further include an insulating layer disposed between the multi-functional layer and the metal layer.

[0021] In one embodiment of the present invention, the display device may further include a second display substrate disposed on the display substrate. In a cross-sectional view, the width of the display substrate may be greater than the width of the second display substrate.

[0022] In one embodiment of the present invention, the multi-functional layer may include graphite powder of a first size and graphite powder of a second size smaller than the first size.

[0023] In one embodiment of the present invention, the graphite powder of the first size may be 60 um or more and 100 um or less. The graphite powder of the second size may be 4 um or more and 40 um or less.

[0024] According to one embodiment of the present invention, a display device includes a metal layer, a multi-functional layer, an adhesive layer, and a display substrate. The multi-functional layer is in contact with the metal layer and includes graphite and a resin mixed with the graphite. The adhesive layer is disposed on the metal layer and the multi-functional layer. The display substrate is disposed on the adhesive layer.

[0025] According to one embodiment of the present invention, a display device includes a metal layer, a multi-functional layer, an adhesive layer, and a display substrate. The multi-functional layer is in contact with the metal layer and includes a heat dissipating material including at least one of graphite, graphene, carbon fiber, carbon nanotube, boron nitride, and alumina, and a resin mixed with the heat dissipating material. The adhesive layer is disposed on the metal layer and the multi-functional layer. The display substrate is disposed on the adhesive layer.

[0026] According to such a display device, the display device includes a metal layer and a multi-functional layer in contact with the metal layer and including graphite and a resin mixed with the graphite, and the multi-functional layer can be adhered to the display substrate through an adhesive layer.

[0027] Heat dissipation, electromagnetic interference (EMI) shielding, and electrostatic discharge (ESD) shielding are performed by the metal layer and the multi-functional layer, thereby preventing damage to the display device and improving the safety and reliability of the display device.

[0028] The heat dissipation function can be further improved by directly contacting the multi-functional layer, which is an anisotropic heat dissipation member, and the metal layer, which is an isotropic heat dissipation member.

[0029] In addition, back reflection light can be shaded by the multi-functional layer, impact can be absorbed by the multi-functional layer, rigidity can be increased by the metal layer, and adhesiveness can be improved by the adhesive layer.

[0030] In addition, since the multi-functional layer includes the graphite and the resin mixed with the graphite, particles of the graphite do not fall off or come out, and a sealing process for the graphite is not required. Accordingly, the manufacturing process of the display device can be simplified, the dead space of the display device can be reduced, and the heat dissipation efficiency of the multi-functional member can be improved.

[0031] FIG. 1 is a block diagram showing a display device according to one embodiment of the present invention.

[0032] Fig. 2 is a cross-sectional view showing the display device of Fig. 1.

[0033] Figure 3 is a cross-sectional view showing a display device according to one embodiment of the present invention.

[0034] Figure 4 is a cross-sectional view showing a display device according to one embodiment of the present invention.

[0035] Fig. 5 is a cross-sectional view showing a display device according to one embodiment of the present invention.

[0036] Fig. 6 is a cross-sectional view showing a display device according to one embodiment of the present invention.

[0037] Fig. 7 is a cross-sectional view showing a display device according to one embodiment of the present invention.

[0038] Figure 8 is a block diagram showing an electronic device according to one embodiment of the present invention.

[0039] FIG. 9 is a drawing showing an example in which the electronic device of FIG. 8 is implemented as a smartphone.

[0040] Fig. 10 is a drawing showing an example in which the electronic device of Fig. 8 is implemented as a monitor.

[0041] With respect to the embodiments of the present invention disclosed in the text, specific structural and functional descriptions are merely illustrative for the purpose of explaining the embodiments of the present invention, and the embodiments of the present invention may be implemented in various forms and should not be construed as being limited to the embodiments described in the text.

[0042] The present invention is susceptible to various modifications and takes various forms. Specific embodiments are illustrated in the drawings and described in detail herein. However, this is not intended to limit the present invention to specific disclosed forms, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0043] While terms like "first" and "second" may be used to describe various components, these components should not be limited by these terms. These terms may be used to distinguish one component from another. For example, without departing from the scope of the present invention, a first component could be referred to as a "second component," and similarly, a second component could also be referred to as a "first component."

[0044] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components in between. Conversely, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Other expressions that describe the relationship between components, such as "between" and "directly between" or "adjacent to" and "directly adjacent to", should be interpreted similarly.

[0045] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms “comprise” or “have” indicate the presence of a described feature, number, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0046] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be construed in an idealized or overly formal sense unless explicitly defined herein.

[0047] Meanwhile, if a particular embodiment can be implemented differently, the functions or operations specified within a particular block may occur in a different order than specified in the flowchart. For example, two consecutive blocks may actually be executed substantially simultaneously, or, depending on the related functions or operations, the blocks may be executed in reverse order.

[0048] Hereinafter, the present invention will be described in more detail with reference to the attached drawings. Identical components in the drawings are designated by the same reference numerals, and redundant descriptions of identical components are omitted.

[0049] FIG. 1 is a block diagram showing a display device according to one embodiment of the present invention.

[0050] Referring to FIG. 1, the display device includes a display panel (100) and a display panel driver. The display panel driver drives the display panel (100). The display panel driver includes a drive control unit (200), a gate driver (300), a gamma reference voltage generator (400), and a data driver (500). The display panel driver may further include a power voltage generator (600).

[0051] For example, the drive control unit (200) and the data drive unit (500) may be formed integrally. For example, the drive control unit (200), the gamma reference voltage generation unit (400), and the data drive unit (500) may be formed integrally. A drive module in which at least the drive control unit (200) and the data drive unit (500) are formed integrally may be named a timing controller embedded data driver (TED).

[0052] The above display panel (100) includes a display portion (AA) that displays an image and a peripheral portion (PA) arranged adjacent to the display portion (AA).

[0053] The display panel (100) includes a plurality of gate lines (GL), a plurality of data lines (DL), and a plurality of pixels (P) electrically connected to each of the gate lines (GL) and the data lines (DL). The gate lines (GL) may extend in a first direction (D1), and the data lines (DL) may extend in a second direction (D2) intersecting the first direction (D1).

[0054] The above driving control unit (200) receives input image data (IMG) and an input control signal (CONT) from an external device (e.g., an application processor). For example, the input image data (IMG) may include red image data, green image data, and blue image data. The input image data (IMG) may include white image data. The input image data (IMG) may include magenta image data, yellow image data, and cyan image data. The input control signal (CONT) may include a master clock signal and a data enable signal. The input control signal (CONT) may further include a vertical synchronization signal and a horizontal synchronization signal.

[0055] The above driving control unit (200) can generate a first control signal (CONT1), a second control signal (CONT2), a third control signal (CONT3), a fourth control signal (CONT4), and a data signal (DATA) based on the input image data (IMG) and the input control signal (CONT).

[0056] The above driving control unit (200) can generate the first control signal (CONT1) for controlling the operation of the gate driving unit (300) based on the input control signal (CONT) and output the first control signal (CONT1) to the gate driving unit (300). The first control signal (CONT1) can include a vertical start signal and a gate clock signal.

[0057] The above drive control unit (200) can generate the second control signal (CONT2) for controlling the operation of the data drive unit (500) based on the input control signal (CONT) and output it to the data drive unit (500). The second control signal (CONT2) can include a horizontal start signal and a load signal.

[0058] The above driving control unit (200) generates a data signal (DATA) based on the input image data (IMG). The driving control unit (200) outputs the data signal (DATA) to the data driving unit (500).

[0059] The above driving control unit (200) can generate the third control signal (CONT3) for controlling the operation of the gamma reference voltage generation unit (400) based on the input control signal (CONT) and output it to the gamma reference voltage generation unit (400).

[0060] The gate driver (300) can generate gate signals for driving the gate lines (GL) in response to the first control signal (CONT1) received from the drive control unit (200). The gate driver (300) can output the gate signals to the gate lines (GL). For example, the gate driver (300) can sequentially output the gate signals to the gate lines (GL). For example, the gate driver (300) can be mounted on the peripheral portion (PA) of the display panel (100). For example, the gate driver (300) can be integrated on the peripheral portion (PA) of the display panel (100).

[0061] The gamma reference voltage generation unit (400) can generate a gamma reference voltage (VGREF) in response to the third control signal (CONT3) received from the driving control unit (200). The gamma reference voltage generation unit (400) can provide the gamma reference voltage (VGREF) to the data driving unit (500).

[0062] In one embodiment of the present invention, the gamma reference voltage generation unit (400) may be placed within the driving control unit (200) or within the data driving unit (500).

[0063] The data driving unit (500) may receive the second control signal (CONT2) and the data signal (DATA) from the driving control unit (200), and may receive the gamma reference voltage (VGREF) from the gamma reference voltage generation unit (400). The data driving unit (500) may convert the data signal (DATA) into an analog data voltage using the gamma reference voltage (VGREF). The data driving unit (500) may output the data voltage to the data line (DL).

[0064] The power voltage generation unit (600) can generate a power voltage in response to the fourth control signal (CONT4) received from the driving control unit (200). For example, the power voltage generation unit (600) can generate a first power voltage (ELVDD) and a second power voltage (ELVSS) applied to the pixel (P) of the display panel (100). For example, the power voltage generation unit (600) can generate a data power voltage (AVDD) applied to the data driving unit (500).

[0065] Fig. 2 is a cross-sectional view showing the display device of Fig. 1.

[0066] Referring to FIGS. 1 and 2, the display device includes a metal layer (ML), a multi-functional layer (TF), an adhesive layer (TA), and a display substrate (S1). Here, the metal layer (ML), the multi-functional layer (TF), and the adhesive layer (TA) may be referred to as a multi-functional element (MFE).

[0067] The above metal layer (ML) may include at least one of copper and aluminum.

[0068] The multi-functional layer (TF) may be in contact with the metal layer (ML). The multi-functional layer (TF) may include a heat dissipating material including at least one of graphite, graphene, carbon fiber, carbon nanotube, boron nitride, and alumina, and a resin mixed with the heat dissipating material. The resin may include at least one of polyurethane (PU), thermosetting polyurethane (TPU), silicone, epoxy, acrylic, and rubber.

[0069] For example, the multi-functional layer (TF) may include the graphite and a resin mixed with the graphite. For example, the multi-functional layer (TF) may include graphite powder and the resin mixed with the graphite powder. That is, the graphite powder may be mixed with the resin and formed on the metal layer (ML). The resin may be a binder resin.

[0070] Here, the mass ratio of the graphite in the multi-functional layer (TF) may be 30 wt% to 90 wt%. The mass ratio of the resin in the multi-functional layer (TF) may be 70 wt% to 10 wt%. That is, when the graphite in the multi-functional layer (TF) is 30 wt%, the resin may be 70 wt%, and when the graphite in the multi-functional layer (TF) is 90 wt%, the resin may be 10 wt%.

[0071] For example, the size of the graphite powder may be 1 um or more and 100 um or less. The size of the graphite powder may be 4 um or more and 40 um or less.

[0072] For example, the multi-functional layer (TF) may include graphite powder of a first size and graphite powder of a second size smaller than the first size. For example, the graphite powder of the first size may be 60 um or more and 100 um or less. For example, the graphite powder of the second size may be 4 um or more and 40 um or less. The first size and the second size may refer to sizes when the powder is mixed with the resin and arranged in the display device. The powder of the first size and the powder of the second size may have sizes larger than the first size and the second size, respectively, before being mixed with the resin.

[0073] When dispersing the above graphite powder in the above binder resin, an appropriate dispersion method and defoaming method can be used so that the powder particles can be evenly distributed in the dispersion liquid without air bubbles.

[0074] The above graphite and the binder resin can be mixed without a solvent, depending on the mixing ratio, or can be mixed using a solvent. When mixing using a solvent, a solvent that has less effect on dispersion and defoaming (bubble removal) can be selected from among solvents such as water, alcohol, and acetate, and a layer of the graphite and the binder resin can be formed using an appropriate curing method (temperature, aging, etc.) so that pores are not created as the solvent evaporates during curing.

[0075] The adhesive layer (TA) is disposed on the metal layer (ML) and the multi-functional layer (TF). For example, as shown in Fig. 2, the multi-functional layer (TF) may be disposed on the metal layer (ML), and the adhesive layer (TA) may be disposed on the multi-functional layer (TF).

[0076] The display device further includes a printed circuit board (PCB) and a conductive connection (CT). The conductive connection (CT) can directly connect a first surface of the printed circuit board (PCB) and a lower surface of the metal layer (ML).

[0077] The above multi-functional layer (TF) may be an anisotropic heat dissipation member, and the metal layer (ML) may be an isotropic heat dissipation member. In the present embodiment, the multi-functional layer (TF) and the metal layer may be in direct contact. The multi-functional layer (TF), which is an anisotropic heat dissipation member, and the metal layer (ML), which is an isotropic heat dissipation member, may be in direct contact, thereby further improving the heat dissipation function.

[0078] The display device may further include a first anisotropic conductive film (ACF1) disposed on the display substrate (S1), a second anisotropic conductive film (ACF2) disposed on a second surface of the printed circuit board (PCB), and a flexible film (FF) in contact with the first anisotropic conductive film (ACF1) and the second anisotropic conductive film (ACF2).

[0079] The display device may further include a first driving circuit unit (CC1) disposed on the flexible film (FF) and a second driving circuit unit (CC2) disposed on the second surface of the printed circuit board (PCB).

[0080] For example, the first driving circuit unit (CC1) may include the data driving unit (500). For example, the first driving circuit unit (CC1) may include a timing controller embedded data driver (TED) in which the driving control unit (200) and the data driving unit (500) are formed integrally.

[0081] For example, the second driving circuit unit (CC2) may include the driving control unit (200). For example, the second driving circuit unit (CC2) may include the power voltage generation unit (600).

[0082] In this embodiment, the width of the conductive connection (CT) in the cross-sectional view may be the same as the width of the printed circuit board (PCB). For example, the conductive connection (CT) may be a thermally conductive adhesive.

[0083] The display device may further include a second display substrate (S2) disposed on the display substrate (S1). The display substrate (S1) may be a lower substrate of the display device, and the second display substrate (S2) may be a lower substrate of the display device.

[0084] In the cross-sectional view, the width of the display substrate (S1) may be greater than the width of the second display substrate (S2). The first anisotropic conductive film (ACF1) may be disposed in an area of ​​the display substrate (S1) that does not overlap with the second display substrate (S2).

[0085] The above multi-functional element (MFE) includes the metal layer (ML) which is an isotropic material and the multi-functional layer (TF) which is an anisotropic material, and can efficiently spread heat generated in the display device to eliminate hot spots in specific parts of the display device and lower the overall heat (temperature).

[0086] The above multi-function element (MFE) includes the multi-function layer (TF) and is connected to the printed circuit board (PCB) by the conductive connection (CT), thereby allowing heat generated in the second driving circuit (CC2) to be diffused.

[0087] The above multi-function element (MFE) includes the metal layer (ML) and is connected to the printed circuit board (PCB) by the conductive connection (CT), so that static electricity on the printed circuit board (PCB) or static electricity transmitted through the surface of the display panel (100) can be quickly dissipated using the conduction of the metal layer (ML).

[0088] A material with high conductivity (very low resistance) can have an electromagnetic shielding function. The multi-functional element (MFE) includes the metal layer (ML) which is an isotropic material and the multi-functional layer (TF) which is an anisotropic material, and thus has high conductivity and can perform an electromagnetic shielding function.

[0089] The above multi-function element (MFE) includes the metal layer (ML) and is connected to the printed circuit board (PCB) by the conductive connection portion (CT), so as to effectively shield electromagnetic waves radiated from the first driving circuit portion (CC1) and the second driving circuit portion (CC2). Since the metal layer (ML) has a large area, the electromagnetic waves can be effectively shielded.

[0090] The graphite of the above multi-functional layer (TF) has a dark gray color and can act as a light shield to prevent light leakage in the display area of ​​the display panel (100).

[0091] Since the graphite of the above multi-functional layer (TF) has more elastic properties than metal, it can perform a shock absorption function and prevent the display substrate (S1) from breaking.

[0092] Since the above multi-functional layer (TF) includes the graphite and a resin mixed with the graphite, there is a low possibility that particles of the graphite will fall off or come out, and accordingly, a sealing process of the graphite is not necessary.

[0093] Since no space is required for sealing the graphite, the width of the multi-functional layer (TF) in the cross-sectional view of Fig. 2 may be the same as the width of the adhesive layer (TA).

[0094] Since no space is required for sealing the above graphite, the heat dissipation efficiency of the above multi-function element (MFE) can be improved.

[0095] According to the present embodiment, the display device includes a metal layer (ML) and a multi-functional layer (TF) in contact with the metal layer (ML) and including graphite and a resin mixed with the graphite, and the multi-functional layer (TF) can be adhered to the display substrate (S1) through an adhesive layer (TA).

[0096] Heat dissipation, electromagnetic interference (EMI) shielding, and electrostatic discharge (ESD) shielding are performed by the metal layer (ML) and the multi-functional layer (TF), thereby preventing damage to the display device and improving the safety and reliability of the display device.

[0097] The heat dissipation function can be further improved by directly contacting the multi-functional layer (TF), which is an anisotropic heat dissipation member, and the metal layer (ML), which is an isotropic heat dissipation member.

[0098] In addition, back reflection light can be shielded by the multi-functional layer (TF), impact can be absorbed by the multi-functional layer (TF), rigidity can be increased by the metal layer (ML), and adhesiveness can be improved by the adhesive layer (TA).

[0099] In addition, since the multi-functional layer (TF) includes the graphite and the resin mixed with the graphite, particles of the graphite do not fall off or come out, and a sealing process for the graphite is not required. Accordingly, the manufacturing process of the display device can be simplified, the dead space of the display device can be reduced, and the heat dissipation efficiency of the multi-functional element (MFE) can be improved.

[0100] Figure 3 is a cross-sectional view showing a display device according to one embodiment of the present invention.

[0101] The display device according to the present embodiment is substantially the same as the display devices of FIGS. 1 and 2 except for the conductive connection parts, and therefore the same reference numbers are used for the same or similar components, and redundant descriptions are omitted.

[0102] Referring to FIGS. 1 and 3, the display device includes a metal layer (ML), a multi-functional layer (TF), an adhesive layer (TA), and a display substrate (S1). Here, the metal layer (ML), the multi-functional layer (TF), and the adhesive layer (TA) may be referred to as a multi-functional element (MFE).

[0103] The multi-functional layer (TF) may be in contact with the metal layer (ML). The multi-functional layer (TF) may include a heat dissipating material including at least one of graphite, graphene, carbon nanotubes, boron nitride, and alumina, and a resin mixed with the heat dissipating material. The resin may include at least one of epoxy and acrylic.

[0104] For example, the multi-functional layer (TF) may include the graphite and a resin mixed with the graphite. For example, the multi-functional layer (TF) may include graphite powder and the resin mixed with the graphite powder. That is, the graphite powder may be mixed with the resin and formed on the metal layer (ML).

[0105] The display device further includes a printed circuit board (PCB) and a conductive connection (CTA). The conductive connection (CTA) can directly connect a first surface of the printed circuit board (PCB) and a lower surface of the metal layer (ML).

[0106] In this embodiment, the width of the conductive connection (CTA) in the cross-sectional view may be smaller than the width of the printed circuit board (PCB). For example, the conductive connection (CTA) may be a thermally conductive adhesive or a conductive material.

[0107] According to the present embodiment, the display device includes a metal layer (ML) and a multi-functional layer (TF) in contact with the metal layer (ML) and including graphite and a resin mixed with the graphite, and the multi-functional layer (TF) can be adhered to the display substrate (S1) through an adhesive layer (TA).

[0108] Heat dissipation, electromagnetic interference (EMI) shielding, and electrostatic discharge (ESD) shielding are performed by the metal layer (ML) and the multi-functional layer (TF), thereby preventing damage to the display device and improving the safety and reliability of the display device.

[0109] The heat dissipation function can be further improved by directly contacting the multi-functional layer (TF), which is an anisotropic heat dissipation member, and the metal layer (ML), which is an isotropic heat dissipation member.

[0110] In addition, back reflection light can be shielded by the multi-functional layer (TF), impact can be absorbed by the multi-functional layer (TF), rigidity can be increased by the metal layer (ML), and adhesiveness can be improved by the adhesive layer (TA).

[0111] In addition, since the multi-functional layer (TF) includes the graphite and the resin mixed with the graphite, particles of the graphite do not fall off or come out, and a sealing process for the graphite is not required. Accordingly, the manufacturing process of the display device can be simplified, the dead space of the display device can be reduced, and the heat dissipation efficiency of the multi-functional element (MFE) can be improved.

[0112] Figure 4 is a cross-sectional view showing a display device according to one embodiment of the present invention.

[0113] The display device according to the present embodiment is substantially the same as the display devices of FIGS. 1 and 2 except for the conductive connection parts, and therefore the same reference numbers are used for the same or similar components, and redundant descriptions are omitted.

[0114] Referring to FIGS. 1 and 4, the display device includes a metal layer (ML), a multi-functional layer (TF), an adhesive layer (TA), and a display substrate (S1). Here, the metal layer (ML), the multi-functional layer (TF), and the adhesive layer (TA) may be referred to as a multi-functional element (MFE).

[0115] The multi-functional layer (TF) may be in contact with the metal layer (ML). The multi-functional layer (TF) may include a heat dissipating material including at least one of graphite, graphene, carbon nanotubes, boron nitride, and alumina, and a resin mixed with the heat dissipating material. The resin may include at least one of epoxy and acrylic.

[0116] For example, the multi-functional layer (TF) may include the graphite and a resin mixed with the graphite. For example, the multi-functional layer (TF) may include graphite powder and the resin mixed with the graphite powder. That is, the graphite powder may be mixed with the resin and formed on the metal layer (ML).

[0117] The display device further includes a printed circuit board (PCB) and a conductive connection portion (CTB). The conductive connection portion (CTB) can directly connect a first surface of the printed circuit board (PCB) and a lower surface of the metal layer (ML).

[0118] In the present embodiment, the width of the conductive connection portion (CTB) in the cross-sectional view may be smaller than the width of the printed circuit board (PCB). In the present embodiment, the conductive connection portion (CTB) may be formed integrally with the metal layer (ML). That is, the conductive connection portion (CTB) may be a protrusion of the metal layer (ML).

[0119] According to the present embodiment, the display device includes a metal layer (ML) and a multi-functional layer (TF) in contact with the metal layer (ML) and including graphite and a resin mixed with the graphite, and the multi-functional layer (TF) can be adhered to the display substrate (S1) through an adhesive layer (TA).

[0120] Heat dissipation, electromagnetic interference (EMI) shielding, and electrostatic discharge (ESD) shielding are performed by the metal layer (ML) and the multi-functional layer (TF), thereby preventing damage to the display device and improving the safety and reliability of the display device.

[0121] The heat dissipation function can be further improved by directly contacting the multi-functional layer (TF), which is an anisotropic heat dissipation member, and the metal layer (ML), which is an isotropic heat dissipation member.

[0122] In addition, back reflection light can be shielded by the multi-functional layer (TF), impact can be absorbed by the multi-functional layer (TF), rigidity can be increased by the metal layer (ML), and adhesiveness can be improved by the adhesive layer (TA).

[0123] In addition, since the multi-functional layer (TF) includes the graphite and the resin mixed with the graphite, particles of the graphite do not fall off or come out, and a sealing process for the graphite is not required. Accordingly, the manufacturing process of the display device can be simplified, the dead space of the display device can be reduced, and the heat dissipation efficiency of the multi-functional element (MFE) can be improved.

[0124] Fig. 5 is a cross-sectional view showing a display device according to one embodiment of the present invention.

[0125] The display device according to the present embodiment is substantially the same as the display devices of FIGS. 1 and 2 except for the conductive connection parts, and therefore the same reference numbers are used for the same or similar components, and redundant descriptions are omitted.

[0126] Referring to FIGS. 1 and 5, the display device includes a metal layer (ML), a multi-functional layer (TF), an adhesive layer (TA), and a display substrate (S1). Here, the metal layer (ML), the multi-functional layer (TF), and the adhesive layer (TA) may be referred to as a multi-functional element (MFE).

[0127] The multi-functional layer (TF) may be in contact with the metal layer (ML). The multi-functional layer (TF) may include a heat dissipating material including at least one of graphite, graphene, carbon nanotubes, boron nitride, and alumina, and a resin mixed with the heat dissipating material. The resin may include at least one of epoxy and acrylic.

[0128] For example, the multi-functional layer (TF) may include the graphite and a resin mixed with the graphite. For example, the multi-functional layer (TF) may include graphite powder and the resin mixed with the graphite powder. That is, the graphite powder may be mixed with the resin and formed on the metal layer (ML).

[0129] The display device further includes a printed circuit board (PCB) and a conductive connection (CTC). The conductive connection (CTC) can directly connect a first surface of the printed circuit board (PCB) and a lower surface of the metal layer (ML).

[0130] In the present embodiment, the width of the conductive connection portion (CTC) in the cross-sectional view may be smaller than the width of the printed circuit board (PCB). In the present embodiment, the conductive connection portion (CTC) may protrude from the printed circuit board (PCB). For example, the conductive connection portion (CTC) may be a pin of the printed circuit board (PCB) protruding from the printed circuit board (PCB).

[0131] According to the present embodiment, the display device includes a metal layer (ML) and a multi-functional layer (TF) in contact with the metal layer (ML) and including graphite and a resin mixed with the graphite, and the multi-functional layer (TF) can be adhered to the display substrate (S1) through an adhesive layer (TA).

[0132] Heat dissipation, electromagnetic interference (EMI) shielding, and electrostatic discharge (ESD) shielding are performed by the metal layer (ML) and the multi-functional layer (TF), thereby preventing damage to the display device and improving the safety and reliability of the display device.

[0133] The heat dissipation function can be further improved by directly contacting the multi-functional layer (TF), which is an anisotropic heat dissipation member, and the metal layer (ML), which is an isotropic heat dissipation member.

[0134] In addition, back reflection light can be shielded by the multi-functional layer (TF), impact can be absorbed by the multi-functional layer (TF), rigidity can be increased by the metal layer (ML), and adhesiveness can be improved by the adhesive layer (TA).

[0135] In addition, since the multi-functional layer (TF) includes the graphite and the resin mixed with the graphite, particles of the graphite do not fall off or come out, and a sealing process for the graphite is not required. Accordingly, the manufacturing process of the display device can be simplified, the dead space of the display device can be reduced, and the heat dissipation efficiency of the multi-functional element (MFE) can be improved.

[0136] Fig. 6 is a cross-sectional view showing a display device according to one embodiment of the present invention.

[0137] The display device according to the present embodiment is substantially the same as the display devices of FIGS. 1 and 2 except that it further includes a metal electrode, and therefore the same reference numbers are used for the same or similar components, and redundant descriptions are omitted.

[0138] Referring to FIGS. 1 and 6, the display device includes a metal layer (ML), a multi-functional layer (TF), an adhesive layer (TA), and a display substrate (S1). Here, the metal layer (ML), the multi-functional layer (TF), and the adhesive layer (TA) may be referred to as a multi-functional element (MFE).

[0139] The multi-functional layer (TF) may be in contact with the metal layer (ML). The multi-functional layer (TF) may include a heat dissipating material including at least one of graphite, graphene, carbon nanotubes, boron nitride, and alumina, and a resin mixed with the heat dissipating material. The resin may include at least one of epoxy and acrylic.

[0140] For example, the multi-functional layer (TF) may include the graphite and a resin mixed with the graphite. For example, the multi-functional layer (TF) may include graphite powder and the resin mixed with the graphite powder. That is, the graphite powder may be mixed with the resin and formed on the metal layer (ML).

[0141] The display device further includes a printed circuit board (PCB) and a conductive connection (CT). The conductive connection (CT) can directly connect a first surface of the printed circuit board (PCB) and a lower surface of the metal layer (ML).

[0142] In the present embodiment, the display device may further include a metal electrode (ME) that contacts the lower surface of the metal layer (ML). For example, the metal electrode (ME) may be connected to ground. Alternatively, the metal electrode (ME) may be connected to a power voltage line of the display device.

[0143] Since an electrostatic path and an electromagnetic wave path are formed by the printed circuit board (PCB), the conductive connection (CT), the metal layer (ML), and the metal electrode (ME), electrostatic shielding performance and electromagnetic wave shielding performance can be improved due to the metal electrode (ME).

[0144] According to the present embodiment, the display device includes a metal layer (ML) and a multi-functional layer (TF) in contact with the metal layer (ML) and including graphite and a resin mixed with the graphite, and the multi-functional layer (TF) can be adhered to the display substrate (S1) through an adhesive layer (TA).

[0145] Heat dissipation, electromagnetic interference (EMI) shielding, and electrostatic discharge (ESD) shielding are performed by the metal layer (ML) and the multi-functional layer (TF), thereby preventing damage to the display device and improving the safety and reliability of the display device.

[0146] The heat dissipation function can be further improved by directly contacting the multi-functional layer (TF), which is an anisotropic heat dissipation member, and the metal layer (ML), which is an isotropic heat dissipation member.

[0147] In addition, back reflection light can be shielded by the multi-functional layer (TF), impact can be absorbed by the multi-functional layer (TF), rigidity can be increased by the metal layer (ML), and adhesiveness can be improved by the adhesive layer (TA).

[0148] In addition, since the multi-functional layer (TF) includes the graphite and the resin mixed with the graphite, particles of the graphite do not fall off or come out, and a sealing process for the graphite is not required. Accordingly, the manufacturing process of the display device can be simplified, the dead space of the display device can be reduced, and the heat dissipation efficiency of the multi-functional element (MFE) can be improved.

[0149] Fig. 7 is a cross-sectional view showing a display device according to one embodiment of the present invention.

[0150] The display device according to the present embodiment is substantially the same as the display device of FIGS. 1 and 2 except that it further includes an insulating layer, and therefore the same reference numbers are used for the same or similar components, and redundant descriptions are omitted.

[0151] Referring to FIGS. 1 and 7, the display device includes a metal layer (ML), a multi-functional layer (TF), an adhesive layer (TA), and a display substrate (S1). Here, the metal layer (ML), the multi-functional layer (TF), and the adhesive layer (TA) may be referred to as a multi-functional element (MFEA).

[0152] The multi-functional layer (TF) may be in contact with the metal layer (ML). The multi-functional layer (TF) may include a heat dissipating material including at least one of graphite, graphene, carbon nanotubes, boron nitride, and alumina, and a resin mixed with the heat dissipating material. The resin may include at least one of epoxy and acrylic.

[0153] For example, the multi-functional layer (TF) may include the graphite and a resin mixed with the graphite. For example, the multi-functional layer (TF) may include graphite powder and the resin mixed with the graphite powder. That is, the graphite powder may be mixed with the resin and formed on the metal layer (ML).

[0154] The display device further includes a printed circuit board (PCB) and a conductive connection (CT). The conductive connection (CT) can directly connect a first surface of the printed circuit board (PCB) and a lower surface of the metal layer (ML).

[0155] In the present embodiment, the display device may further include an insulating layer (IL) disposed between the multi-functional layer (TF) and the metal layer (ML).

[0156] For example, the insulating layer (IL) may be a double-sided adhesive layer. For example, the insulating layer (IL) may include at least one of polyethylene terephthalate (PET), polycarbonate (PC), polytetrafluoroethylene (PTFE), polyurethane (PU), thermoplastic polyurethane (TPU), aerogel, and mica.

[0157] According to the present embodiment, the display device includes a metal layer (ML) and a multi-functional layer (TF) in contact with the metal layer (ML) and including graphite and a resin mixed with the graphite, and the multi-functional layer (TF) can be adhered to the display substrate (S1) through an adhesive layer (TA).

[0158] Heat dissipation, electromagnetic interference (EMI) shielding, and electrostatic discharge (ESD) shielding are performed by the metal layer (ML) and the multi-functional layer (TF), thereby preventing damage to the display device and improving the safety and reliability of the display device.

[0159] The heat dissipation function can be further improved by directly contacting the multi-functional layer (TF), which is an anisotropic heat dissipation member, and the metal layer (ML), which is an isotropic heat dissipation member.

[0160] In addition, back reflection light can be shielded by the multi-functional layer (TF), impact can be absorbed by the multi-functional layer (TF), rigidity can be increased by the metal layer (ML), and adhesiveness can be improved by the adhesive layer (TA).

[0161] In addition, since the multi-functional layer (TF) includes the graphite and the resin mixed with the graphite, particles of the graphite do not fall off or come out, and a sealing process for the graphite is not required. Accordingly, the manufacturing process of the display device can be simplified, the dead space of the display device can be reduced, and the heat dissipation efficiency of the multi-functional element (MFEA) can be improved.

[0162] FIG. 8 is a block diagram illustrating an electronic device according to one embodiment of the present invention. FIG. 9 is a diagram illustrating an example of the electronic device of FIG. 8 being implemented as a smartphone. FIG. 10 is a diagram illustrating an example of the electronic device of FIG. 8 being implemented as a monitor.

[0163] Referring to FIGS. 8 to 10, the electronic device (1000) may include a processor (1010), a memory device (1020), a storage device (1030), an input / output device (1040), a power supply (1050), and a display device (1060). In this case, the display device (1060) may be the display device of FIG. 1. In addition, the electronic device (1000) may further include several ports that can communicate with a video card, a sound card, a memory card, a USB device, etc., or communicate with other systems.

[0164] According to one embodiment, as illustrated in FIG. 9, the electronic device (1000) may be implemented as a smartphone. As illustrated in FIG. 10, the electronic device (1000) may be implemented as a monitor. However, this is merely exemplary, and the electronic device (1000) is not limited thereto. For example, the electronic device (1000) may be implemented as a television, a mobile phone, a video phone, a smart pad, a smart watch, a tablet PC, a vehicle navigation system, a laptop, a head-mounted display device, etc.

[0165] The processor (1010) may perform specific calculations or tasks. Depending on the embodiment, the processor (1010) may be a microprocessor, a central processing unit, an application processor, etc. The processor (1010) may be connected to other components via an address bus, a control bus, a data bus, etc. Depending on the embodiment, the processor (1010) may also be connected to an expansion bus, such as a Peripheral Component Interconnect (PCI) bus.

[0166] The above processor (1010) can output the input image data (IMG) and the input control signal (CONT) to the driving control unit (200) of FIG. 1.

[0167] The memory device (1020) can store data necessary for the operation of the electronic device (1000). For example, the memory device (1020) may include a non-volatile memory device such as an Erasable Programmable Read-Only Memory (EPROM) device, an Electrically Erasable Programmable Read-Only Memory (EEPROM) device, a flash memory device, a Phase Change Random Access Memory (PRAM) device, a Resistance Random Access Memory (RRAM) device, a Nano Floating Gate Memory (NFGM) device, a Polymer Random Access Memory (PoRAM) device, a Magnetic Random Access Memory (MRAM), a Ferroelectric Random Access Memory (FRAM) device, and / or a volatile memory device such as a Dynamic Random Access Memory (DRAM) device, a Static Random Access Memory (SRAM) device, a mobile DRAM device, and the like.

[0168] The storage device (1030) may include a solid state drive (SSD), a hard disk drive (HDD), a CD-ROM, etc. The input / output device (1040) may include an input means such as a keyboard, a keypad, a touchpad, a touchscreen, a mouse, etc., and an output means such as a speaker, a printer, etc. In some embodiments, a display device (1060) may be included in the input / output device (1040). The power supply (1050) may supply power required for the operation of the electronic device (1000). The display device (1060) may be connected to other components via the buses or other communication links.

[0169] According to the display device according to the present invention described above, the display quality of the display panel can be improved by reducing the afterimage of the display panel.

[0170] Although the present invention has been described with reference to the above embodiments, it will be understood by those skilled in the art that various modifications and changes can be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below.

Claims

1. Metal layer; A multi-functional layer disposed on the metal layer and comprising graphite and a resin mixed with the graphite; An adhesive layer disposed on the above multi-functional layer; A display substrate disposed on the adhesive layer; printed circuit board; and A display device characterized by including a conductive connection part that directly connects the first surface of the printed circuit board and the lower surface of the metal layer.

2. In paragraph 1, In the above multi-functional layer, the mass ratio of the graphite is 30 wt% to 90 wt%, A display device characterized in that the mass ratio of the resin in the multi-functional layer is 70 wt% to 10 wt%.

3. A display device according to claim 1, characterized in that the width of the multi-functional layer in the cross-sectional view is the same as the width of the adhesive layer.

4. A display device according to claim 1, characterized in that the multi-functional layer is an anisotropic heat dissipation member, and the metal layer is an isotropic heat dissipation member.

5. A display device according to claim 4, characterized in that the multi-functional layer and the metal layer are in direct contact.

6. In paragraph 1, A first anisotropic conductive film disposed on the display substrate; A second anisotropic conductive film disposed on a second surface of the printed circuit board; and A display device further comprising a flexible film in contact with the first anisotropic conductive film and the second anisotropic conductive film.

7. In paragraph 6, A first driving circuit unit disposed on the flexible film; and A display device characterized by further comprising a second driving circuit portion arranged on the second surface of the printed circuit board.

8. A display device according to claim 1, characterized in that the width of the conductive connection portion in the cross-sectional view is the same as the width of the printed circuit board.

9. A display device according to claim 1, characterized in that the width of the conductive connection part in the cross-sectional view is smaller than the width of the printed circuit board.

10. A display device according to claim 9, characterized in that the conductive connecting portion is formed integrally with the metal layer.

11. A display device according to claim 9, characterized in that the conductive connecting member is a pin of the printed circuit board protruding from the printed circuit board.

12. In paragraph 1, A display device characterized by further comprising a metal electrode contacting a lower surface of the metal layer.

13. A display device according to claim 12, characterized in that the metal electrode is connected to ground.

14. A display device according to claim 12, characterized in that the metal electrode is connected to a power voltage line of the display device.

15. In paragraph 1, A display device characterized by further comprising an insulating layer disposed between the multi-functional layer and the metal layer.

16. In the first paragraph, a second display substrate is further included, which is arranged on the display substrate. A display device, characterized in that in a cross-sectional view, the width of the display substrate is greater than the width of the second display substrate.

17. A display device according to claim 1, characterized in that the multi-functional layer includes graphite powder of a first size and graphite powder of a second size smaller than the first size.

18. In the 17th paragraph, the graphite powder of the first size is 60 um or more and 100 um or less, A display device, characterized in that the second size graphite powder has a size of 4 um or more and 40 um or less.

19. Metal layer; A multi-functional layer in contact with the metal layer and comprising graphite and a resin mixed with the graphite; An adhesive layer disposed on the metal layer and the multi-functional layer; and A display device characterized by including a display substrate disposed on the adhesive layer.

20. Metal layer; A multi-functional layer comprising a heat-dissipating material in contact with the metal layer and including at least one of graphite, graphene, carbon fiber, carbon nanotube, boron nitride, and alumina, and a resin mixed with the heat-dissipating material; An adhesive layer disposed on the metal layer and the multi-functional layer; and A display device characterized by including a display substrate disposed on the adhesive layer.

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