KR20200129646A - Display Having Heat Radiation Seat And Bending Fixing Member - Google Patents

Abstract

The present application relates to a display device including a heat dissipation sheet and a bending fixing member. According to an embodiment of the present application, the display device includes a display area, a non-display area, the heat dissipation sheet, a driving circuit and the bending fixing member. The non-display area is extended from one end of the display area and is bent to be disposed under the display area. The heat dissipation sheet is disposed on a rear surface of the display area and includes an open portion formed on a lower surface of one end of the display area. The driving circuit portion is disposed in the non-display area. The bending fixing member corresponds to the open portion, and is arranged such that one side of the bending fixing member overlaps a part of the end edge of the heat dissipating sheet and a central portion of the bending fixing member overlaps the driving circuit portion. According to the present invention, a bezel area and thickness can be minimized by bending the non-display area and placing the non-display area on the lower surface of the display area.

Description

Display having heat radiation seat and bending fixing member TECHNICAL FIELD

The present application relates to a display device including a heat dissipation sheet and a bending fixing member. Further, the present application relates to an electronic device using a display device including a heat dissipation sheet and a bending fixing member.

In the modern society, a wide variety of electronic devices such as televisions, monitors, notebook computers, smart phones, tablet computers, electronic pads, wearable devices, watch phones, and navigation systems are used. These electronic devices are implemented in the form of multimedia devices having complex functions such as image display, image capture, music and video file playback, games, and broadcast reception.

The electronic device may include a cover window, a flexible display panel supported by the cover window, a heat dissipation sheet attached to a rear surface of the flexible display panel, a driving circuit unit connected to the flexible display panel, and a housing accommodating them. The flexible display panel may include a panel bending portion bent in a curved shape to reduce a bezel area of an electronic device, and a bending panel fixing member maintaining the bending state.

Display devices and electronic devices including the display devices are being developed to have a thin and light structure. When high-performance electronic devices are designed to be thin, it is necessary to develop structural materials that can effectively remove generated heat. However, when a heat dissipating structure having excellent performance is provided, it is difficult to design a display device and an electronic device with a thin thickness. Accordingly, there is a need for structural development capable of having a thin thickness while maintaining heat dissipation performance.

The content of the background technology described above is technical information that the inventor of the present application possessed for derivation of the present application or acquired during the derivation process of this application, and must be referred to as known technology disclosed to the general public prior to filing this application. I can't.

An object of the present application is to provide a display device including a heat dissipating member and an electronic device using the same. In particular, it is a technical problem to provide a display device capable of securing heat dissipation performance of a display panel while maintaining a thin thickness and an electronic device using the same. In addition, an object of the present application is to provide a display panel capable of maintaining a thin-thick structure and an electronic device using the same while preventing a light leakage problem that may occur due to a difference in reflectance due to the arrangement of the heat dissipating structure.

In addition to the technical problems of the present invention mentioned above, other features and advantages of the present application are described below, or from such technology and description, it will be clearly understood by those of ordinary skill in the art.

The display device according to the exemplary embodiment of the present application includes a display area, a non-display area, a heat dissipation sheet, a driving circuit unit, and a bending fixing member. The non-display area is disposed under the display area by extending and bending at one end of the display area. The heat dissipation sheet is disposed on the rear surface of the display area and includes an open portion formed on the lower surface of one end of the display area. The driving circuit unit is disposed in the non-display area. The bending fixing member corresponds to the open portion, and is disposed so that one side overlaps a part of the end edge of the heat dissipation sheet, and the central portion overlaps the driving circuit portion.

A display device according to another exemplary embodiment of the present application includes a display area, a non-display area, a heat dissipation sheet, a driving circuit unit, and a bending fixing member. The non-display area is disposed under the display area by extending and bending at one end of the display area. The heat dissipation sheet is disposed on the rear surface of the display area, and has an open portion on the lower surface of one end of the display area. The driving circuit unit is disposed in the non-display area. The bending fixing member is disposed so as to correspond within the open portion, one side of which is spaced a predetermined distance from the end edge of the heat dissipating sheet, and the central portion overlaps the driving circuit portion.

The present application has a structural feature of minimizing a bezel area and thickness by bending a non-display area disposed on one side of the display area of the display panel and placing it on the lower surface of the display area. Further, it has a structural feature in which a spaced space due to a design error is eliminated between a fixing member that fixes the driving circuit unit to the lower side of the display area and a heat dissipation member of the display panel. In addition, since the space between the fixing member and the heat dissipating member is removed, it has a structure that fundamentally blocks a light leakage problem that may occur at the boundary.

The present application can effectively dissipate heat from the display panel while securing a minimum thickness. In addition, due to the difference in reflectance, light leakage does not occur in the entire surface, so that good display quality can be provided.

1 is a plan view illustrating a structure of a display device including a heat dissipating sheet and a bending fixing member according to a first exemplary embodiment of the present application.
FIG. 2 is a cross-sectional view taken along the cut line I-I' shown in FIG. 1.
3 is a cross-sectional view taken along line II-II' shown in FIG. 1.
4 is a cross-sectional view showing the structure of a heat dissipation sheet according to the first embodiment of the present application.
5 is a plan view illustrating a structure of a display device including a heat dissipating sheet and a bending fixing member according to a second exemplary embodiment of the present application.
6 is a cross-sectional view taken along line III-III' shown in FIG. 5.
7 is a cross-sectional view taken along the perforation line III-III' shown in FIG. 5 and is a cross-sectional view showing the structure of a heat dissipating sheet and a bending fixing member according to a third embodiment of the present application.
8 is a cross-sectional view illustrating a structure of a heat dissipating sheet and a bending fixing member according to a fourth embodiment of the present application.

Advantages and features of the present application, and a method of achieving them will become apparent with reference to examples described below in detail together with the accompanying drawings. However, the present application is not limited to the examples disclosed below, but will be implemented in a variety of different forms, and only the examples of the present application make the disclosure of the present application complete, and are generally used in the technical field to which the invention of the present application belongs. It is provided to completely inform the scope of the invention to those skilled in the art, and the invention of the present application is only defined by the scope of the claims.

The shape, size, ratio, angle, number, etc. disclosed in the drawings for explaining an example of the present application are exemplary, and the present application is not limited to the illustrated matter. The same reference numerals refer to the same components throughout the specification. In addition, in describing an example of the present application, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present application, the detailed description thereof will be omitted.

When'include','have','consists of' and the like mentioned in the present specification are used, other parts may be added unless'only' is used. In the case of expressing the constituent elements in the singular, it includes the case of including the plural unless specifically stated otherwise.

In interpreting the constituent elements, it is interpreted as including an error range even if there is no explicit description.

In the case of a description of the positional relationship, for example, if the positional relationship of two parts is described as'upper','upper of','lower of','next to','right' Or, unless'direct' is used, one or more other parts may be located between the two parts.

In the case of a description of a temporal relationship, for example, when a temporal predecessor relationship is described as'after','following','after','before', etc.,'right' or'direct' It may also include cases that are not continuous unless this is used.

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

The term “at least one” is to be understood as including all possible combinations from one or more related items. For example, the meaning of “at least one of the first item, the second item, and the third item” means 2 among the first item, the second item, and the third item as well as each of the first item, the second item, or the third item. It may mean a combination of all items that can be presented from more than one.

Each of the features of the various examples of the present application can be partially or totally combined or combined with each other, technically various interlocking and driving are possible, and each of the examples can be implemented independently of each other or can be implemented together in an association relationship. .

Hereinafter, an example of a display device including a heat dissipation sheet and a bending fixing member according to the present application and an electronic device using the same will be described in detail with reference to the accompanying drawings. In adding reference numerals to elements of each drawing, the same elements may have the same numerals as possible even if they are indicated on different drawings.

<First Example>

1 is a plan view illustrating a structure of a display device including a heat dissipating sheet and a bending fixing member according to a first exemplary embodiment of the present application. FIG. 2 is a cross-sectional view taken along the cut line I-I' shown in FIG. 1. 3 is a cross-sectional view taken along line II-II' shown in FIG. 1.

1 is a plan view viewed from the rear surface of a display device, showing a display panel, a heat dissipation sheet attached to the rear surface, and a bending fixing member for convenience. 1 to 3, the display device according to the first embodiment of the present application includes a cover window 100, a display panel 300, a heat dissipation sheet 320, a driving integrated circuit 333, a bending fixing member ( 350), a middle frame 500, and a back cover 700 may be included.

First, a structure of a display device including a heat dissipating sheet and a bending fixing member according to a first exemplary embodiment will be described with reference to FIG. 1. The cover window 100 may be a transparent protective substrate covering the display device. Specifically, by covering the front and side surfaces of the display panel 300, the cover window 100 may provide image information without distortion and protect the display panel 300 from external impacts.

The cover window 100 according to an example may be made of a transparent plastic material, a glass material, or a reinforced glass material. As an example, the cover window 100 may have any one of Sapphire Glass and Gorilla Glass, or a stacked structure thereof. Alternatively, the cover window 100 may include any one of polycarbonate (PC), polyethyleneterephthalate (PET), polyethersulfone (PES), polynorborneen (PNB), and polyethylenapthanate (PEN). The cover window 100 may be made of tempered glass in consideration of scratches and transparency.

The display panel 300 may be attached to the rear surface of the cover window 100. The display panel 300 may include a display area AA for displaying an image and a non-display area NA disposed adjacent to the display area AA. The display area AA may have a polygonal or circular structure. In FIG. 1, the cover window 100 and the display panel 300 are illustrated in a quadrangular shape with four rounded corners, but the present invention is not limited thereto. Alternatively, the upper side may include a notch portion in which a portion is recessed and both sides protrude. For example, a camera 10 and a sensor 20 such as an infrared sensor and/or a face recognition sensor may be disposed in the depression. Display elements may be disposed on both protrusions to have an auxiliary display function.

For example, the non-display area NA may be disposed to surround four sides of the display area AA. As another example, the non-display area NA may be disposed on at least one side of the display area AA. In FIG. 1, for convenience, a case in which the non-display area NA is disposed only on the lower side of the display area AA facing the notch portion is illustrated. Although not illustrated in FIG. 1, a non-display area in which a gate driving element is formed in a GIP (Gate In Panel) method may be further provided on a left side and/or a right side of the display area AA.

A driving integrated circuit 333 is disposed in the non-display area NA. Since the non-display area AA is bent toward the rear, the non-display area AA is not recognized from the front surface of the cover window 100 or the area ratio occupied by the entire area of the cover window 100 can be minimized. The driving integrated circuit 333 may be a device that drives display devices formed on the display panel 300.

A heat radiation sheet 320 may be adhered to the rear surface of the display panel 300. The heat dissipation sheet 320 has a size corresponding to the display panel 300 and may have a similar shape. For example, the heat dissipation sheet 320 may have a rectangular structure in which a notch portion is formed at an upper side corresponding to the display panel 300. In FIG. 1, the heat dissipation sheet 320 is illustrated in a quadrangular shape with rounded four corners, but is not limited thereto. In addition, the heat dissipation sheet 320 may have a shape in which a portion of the lower side where the driving integrated circuit 333 is disposed is removed.

A bending fixing member 350 may be attached to the recessed portion of the heat dissipating sheet 320. The recessed portion of the heat dissipation sheet 320 may be defined as a region from which a partial region of the heat dissipation sheet is removed corresponding to a region in which the driving integrated circuit 333 is disposed. The bending fixing member 350 may be a means for fixing the driving integrated circuit 333 by bending the non-display area NA of the display panel 300 to the rear surface.

The non-display area NA is bent toward the rear, so that the driving integrated circuit 333 may be fixedly attached to the rear surface of the display area AA by the bending fixing member 350. That is, the non-display area NA on which the driving integrated circuit 333 is mounted may be disposed on the lower surface of the bending fixing member 350. Accordingly, the bending fixing member 350 may fix and maintain the bending state of the display panel 300.

A space 1000 may be generated between the heat dissipation sheet 320 and the bending fixing member 350 due to a process error. Even if the spaced space 1000 is designed not to occur, since it occurs in the manufacturing process, it may occur as a result that cannot be avoided in an actual product. The structure exposed by the spacing space 1000 has a reflectance different from that of the heat dissipation sheet 320 and the bending fixing member 350. Accordingly, the degree to which external light incident from the outside of the cover window 100 is reflected is different, and the spaced space 1000 can be recognized from the front surface. In the first embodiment of the present invention, a structure for reducing light leakage of light reflected from the spaced space 1000 is proposed. Since the light leakage preventing structure according to the first embodiment is shown in more detail in a cross-sectional view, it will be described in detail in the cross-sectional structure description below.

A structure of a display device including a heat dissipating sheet and a bending fixing member according to an example of the present application will be described in more detail with reference to FIGS. 2 and 3. 2 and 3 are cross-sectional views, specifically illustrating components not visible in FIG. 1 which is a plan view.

The cover window 100 may include a front portion 110 and a side wall portion 130. The front part 110 is a central part of the cover window 100 and may be a transparent area through which light is transmitted. The front part 110 may have an overall planar shape.

The sidewall portion 130 may be curved from an edge portion of the front portion 110 in a curved shape having a predetermined radius of curvature. For example, the sidewall portion 130 is a first sidewall curved from a first edge portion (or a left edge portion) of the front portion 110, a second edge portion (or a right edge portion) of the front portion 110 The curved second side wall, the third side wall curved from the third edge portion (or upper edge portion) of the front portion 110, the fourth curved portion from the fourth edge portion (or lower edge portion) of the front portion 110 It may include a sidewall and a rounding portion connected between the first to fourth sidewalls. Accordingly, the edge portion of the front portion 110 may have a structure that is entirely curved by the sidewall portion 130. The side wall portion 130 may be expressed as a side window or a side curved window.

The cover window 100 may improve the aesthetics of a display device (or an electronic device including a display panel) by having a curved four-sided bending structure. In addition, the width of the bezel in the horizontal direction and the vertical direction of the display device may be reduced. In some cases, the cover window 100 may be formed in the form of a plate including only the front portion 110. When the cover window 100 is formed in a plate shape, the above-described sidewall portion 130 is omitted.

Additionally, the cover window 100 may further include a design layer (or decoration layer) provided at an edge portion. The design layer may be printed at least once on an edge portion of the rear surface (or rear surface) of the cover window 100 facing the display panel 300. In addition, the design layer overlaps the non-display area AA in which an image is not displayed in the electronic device, so that reflected light leaking through the non-display area AA may be removed. For example, as shown in FIG. 3, the design layer 40 may be formed under the cover window 100.

The display panel 300 may be coupled to the rear (or rear) of the cover window 100 to display an image or sense a user touch. The display panel 300 may be bonded to the rear surface of the cover window 100 through a direct bonding process using the panel bonding member 200. Here, the panel bonding member 200 may include pressure sensitive adhesive (PSA), optical clear adhesive (OCA), or optical clear resin (OCR). The panel bonding member 200 may be expressed as a transparent adhesive member.

The display panel 300 may include a display unit 300a, a first bending display unit 300b, and a second bending display unit 300c. The display unit 300a may display an image toward the front portion 110 of the cover window 100. The first bending display unit 300b may be rounded from the first edge (left side) of the display unit 300a in a curved shape to display an image toward the curved surface of the first sidewall of the sidewalls 130 of the cover window 100. . The second bending display unit 300c may be rounded from the second edge (right side) of the display unit 300a in a curved shape to display an image toward the curved surface of the second sidewall of the sidewalls 130 of the cover window 100. .

In some cases, the first bending display unit 300b and the second bending display unit 300c may be omitted. In this case, while the display portion 300a of the display panel 300 overlaps with the front portion 110 of the cover window 100, it may not overlap with the sidewall portion 130.

The display panel 300 may display an image on each of the display unit 300a, the first bending display unit 300b, and the second bending display unit 300c. Alternatively, an image may be displayed only on the display unit 300a. The display panel 300 according to an example includes a flexible substrate 311, a pixel array layer 312, a gate driving circuit unit (GDC), a pad unit (DPP), an encapsulation layer 313, a touch electrode layer 315, and a functional film. 317, a first back plate BP1 and a second back plate BP2 may be included.

The flexible substrate 311 may be defined as a base substrate of the display panel 300. The flexible substrate 311 according to an example may include a plastic material having flexibility, and may include, for example, opaque or colored polyimide (PI). The flexible substrate 311 according to another example may be made of a thin-film glass material having flexibility.

The pixel array layer 312 is formed on the display unit 300a, the first bending display unit 300b, and the second bending display unit 300c defined on the flexible substrate 311, so that the display unit 300a and the first bending display unit ( 300b) and an image may be displayed on each of the second bending display unit 300c. The pixel array layer 312 may include a plurality of pixels provided in a pixel region defined by signal lines provided on the flexible substrate 311 and displaying an image according to signals supplied to the signal lines. The signal lines may include gate lines, data lines, and pixel driving power lines.

Each of the plurality of pixels includes a pixel circuit layer including a driving thin film transistor provided in the pixel region, an anode electrode electrically connected to the driving thin film transistor, a light emitting device layer formed on the anode electrode, and a cathode electrode electrically connected to the light emitting device layer. can do.

The driving thin film transistor is provided in a transistor region of each pixel region defined on the flexible substrate 311 and may include a gate electrode, a gate insulating film, a semiconductor layer, a source electrode, and a drain electrode. Here, the semiconductor layer of the thin film transistor may include silicon such as a-Si, poly-Si, or low-temperature poly-Si, or may include an oxide such as Indium-Gallium-Zinc-Oxide (IGZO).

The anode electrode is provided in a pattern shape in each pixel region and is electrically connected to the driving thin film transistor. The light emitting device layer according to an example may include an organic light emitting device formed on the anode electrode. The organic light-emitting device may be implemented to emit light of the same color, eg, white, for each pixel, or may be implemented to emit light of a different color, eg, red, green, or blue, for each pixel.

The gate driving circuit unit GDC may be formed on the first and/or second edge portions of the flexible substrate 311 so as to be connected to one end and/or the other end of each of the gate signal lines provided on the flexible substrate 311. . The gate driving circuit unit GDC may generate a gate signal in response to a gate control signal supplied from the driving integrated circuit 333 through the pad unit DPP, and may supply the generated gate signal to each of the plurality of gate lines. The gate driving circuit unit GDC may be a gate built-in circuit formed together with a manufacturing process of a thin film transistor of a pixel, but is not limited thereto.

The pad portion DPP may include a plurality of pad electrodes disposed on the flexible substrate 311 to be spaced apart from one side of the pixel array layer 312. The panel bending portion 300d is located in a region where the pad portion DPP and the pixel array layer 312 are spaced apart. In addition, each of the plurality of pad electrodes may be electrically connected to each of the signal lines and the gate driving circuit unit of the pixel array layer 312 through a link line (not shown) disposed on the panel bending unit 300d.

The encapsulation layer 313 is formed on the flexible substrate 311 to cover the pixel array layer 312, thereby preventing oxygen or moisture from penetrating into the light emitting element layer of the pixel array layer 312. The encapsulation layer 313 may be formed in a multilayer structure in which organic material layers and inorganic material layers are alternately stacked. Here, the inorganic material layer may serve to block oxygen or moisture from penetrating into the light emitting device layer of the pixel array layer 312. In addition, the organic material layer may be formed to have a relatively thicker thickness than the inorganic material layer so as to cover particles that may occur during the manufacturing process. For example, the encapsulation layer 313 may include a first inorganic layer, an organic layer on the first inorganic layer, and a second inorganic layer on the organic layer. In this case, the organic layer may be defined as a foreign material cover layer (or a foreign material prevention layer).

The touch electrode layer 315 is disposed on the encapsulation layer 313 and serves as a touch sensor that senses a user's touch to the cover window 100. The touch electrode layer 315 may include a touch electrode disposed on the encapsulation layer 313 overlapping the pixel array layer 312 and a dielectric layer covering the touch electrode. Optionally, the touch electrode layer 315 may be formed on the touch buffer layer 314 covering the encapsulation layer 313. For example, the touch electrode includes a plurality of touch driving electrodes disposed at regular intervals on the encapsulation layer 313 overlapping the pixel array layer 312, and a plurality of touch sensing electrodes electrically insulated from the plurality of touch driving electrodes. It may include. The touch sensing electrodes may be disposed on the same layer as the touch driving electrodes or may be disposed on different layers with a dielectric layer therebetween.

The touch electrode layer 315 according to another example may be replaced with a known capacitive touch panel, and in this case, the touch panel may be attached on the encapsulation layer 313 via a transparent adhesive member. Here, the transparent adhesive member may include a pressure sensitive adhesive (PSA), an optical clear adhesive (OCA), or an optical clear resin (OCR).

The functional film 317 may be attached to the touch electrode layer 315 via the film adhesive member 316 and attached to the rear (or rear) of the cover window 100 via the panel bonding member 200. . Here, the film adhesive member 316 may include pressure sensitive adhesive (PSA), optical clear adhesive (OCA), or optical clear resin (OCR).

The functional film 317 according to an example may include an anti-reflection layer (or anti-reflection film) for improving outdoor visibility and contrast ratio of an image displayed on the display panel 300 by preventing reflection of external light. For example, in the anti-reflection layer, external light incident through the cover window 100 is reflected by the thin film transistors and/or lines disposed on the pixel array layer 312 to proceed to the cover window 100 again. It may include a circularly polarizing layer (or circular tube film) to block light.

The functional film 317 may further include a barrier layer (or barrier film) for primarily preventing moisture or oxygen penetration, and the barrier layer may be made of a material having low moisture permeability, for example, a polymer material. The functional film 317 may further include a light path control layer (or a light path control film) for controlling a path of light emitted from the pixel array layer 312 toward the cover window 100. Since the light path control layer includes a structure in which high and low refractive layers are alternately stacked, a path of light incident from the pixel array layer 312 can be changed to minimize a color shift phenomenon according to a viewing angle.

The first back plate BP1 is attached to the rear surface (or rear surface) of the flexible substrate 311 overlapping the pixel array layer 312 to maintain the flexible substrate 311 overlapping the pixel array layer 312 in a flat state. Let it. The second back plate BP2 is attached to one edge portion of the rear surface (or rear surface) of the flexible substrate 311 overlapping the pad portion DPP, thereby maintaining the edge portion of one side of the flexible substrate 311 in a flat state.

Link lines may be arranged in correspondence with an area between the first back plate BP1 and the second back plate BP2. The link line area of the flexible substrate 311 on which the link lines are arranged may be defined as a panel bending portion 300d that is bent to have a predetermined radius of curvature. That is, the panel bending portion 300d of the flexible substrate 311 is not supported in a flat state by the first back plate BP1 and the second back plate BP2, and thus can be freely bent. Accordingly, the panel bending portion 300d of the flexible substrate 311 is bent so as to surround one side of the first back plate BP1 facing the second back plate BP2, whereby the pad portion DPP is The first back plate BP1 may overlap with an edge portion of the rear side. Accordingly, in the flexible display panel 300, the bezel width can be minimized by bending the panel bent portion 300d of the flexible substrate 311 to have a predetermined radius of curvature.

The flexible display panel 300 according to an example may further include a cover layer (or micro cover layer) 318 covering the panel bent portion 300d of the flexible substrate 311. The cover layer 318 may be formed to cover the panel bending portion 300d of the flexible substrate 311 disposed between the encapsulation layer 313 and the pad portion DPP.

The cover layer 318 includes a polymer material, and may be coated on the panel bending portion 300d of the flexible substrate 311 to cover the link line between the encapsulation layer 313 and the pad portion DPP. The cover layer 318 may prevent permeation to the link line while protecting the link line from external impact. In particular, the cover layer 318 may serve to position the link line on a neutral plane when the panel bending portion 300d of the flexible substrate 311 is bent in a curved shape having a constant radius of curvature. .

That is, when the panel bending portion 300d of the flexible substrate 311 is bent with a constant radius of curvature, the tensile force and the compressive force between the flexible substrate 311 and the cover layer 318 are 0 (zero). There is a neutral plane that becomes Accordingly, the cover layer 318 may include a material having a higher elastic modulus than that of the flexible substrate 311 so that the link lines can be positioned on the neutral surface. Accordingly, the link lines are positioned on the neutral surface between the cover layer 318 and the flexible substrate 311, so that when the panel bending portion 300d of the flexible substrate 311 is bent in a curved shape, a bending stress of zero Because it is subjected to, it can be bent without being damaged by bending stress.

The heat dissipation sheet 320 may be attached to the entire rear surface (or rear surface) of the first back plate BP1. The heat dissipation sheet 320 may also serve as a function of protecting the display panel 300 from an impact and a function of dissipating heat from the display panel 300 in a rear direction.

The bending fixing member 350 (or the first fixing member) is between the first back plate BP1 and the second back plate BP2 overlapping each other based on the thickness direction Z of the flexible display panel 300. May be intervened. The bending fixing member 350 fixes the second back plate BP2 overlapping the rear surface of the first back plate BP1 to the edge of one side of the heat dissipating sheet 320 according to the bending of the flexible substrate 311. Maintain the bending state and bending shape of (311).

The driving integrated circuit 333 may be mounted on the driving circuit unit 330. The driving circuit part 330 may be connected to the pad part DPP of the display panel 300 and disposed on the rear surface of the display panel 300. For example, the driving circuit unit 330 may be disposed on the flexible substrate 311 of the display panel 300. Further, as the flexible substrate 311 is bent, the driving circuit unit 330 disposed on the flexible 311 may be disposed on the rear surface of the flexible substrate 311. The driving circuit unit 330 may display an image on the pixel array layer 312 of the display panel 300 and sense a user touch through the touch electrode layer 315 of the display panel 300. The driving circuit unit 330 according to an example may include a flexible circuit film 331, a driving integrated circuit 333, and a flexible circuit board 335.

The flexible circuit film 331 of the driving circuit unit 300 disposed on the rear surface of the display panel 300 may be electrically connected to the pad unit DPP provided on the flexible substrate 311. The flexible circuit film 331 according to an example may be attached to the pad portion DPP provided on the flexible substrate 311 through a film attaching process using an anisotropic conductive film. For example, the flexible circuit film 331 may be a chip on film.

The driving integrated circuit 333 may be mounted on the flexible circuit film 331 disposed on the rear surface of the display panel 300. The driving integrated circuit 333 according to an example may be mounted on the flexible circuit film 331 by a chip bonding process or a surface mounting process. For example, the driving integrated circuit 333 may be mounted on the flexible circuit film 331 disposed between the pad portion DPP and the flexible circuit board 335.

The driving integrated circuit 333 according to an example generates a data signal and a gate control signal based on image data and a timing synchronization signal supplied from an external host driving system (or host driving circuit board), and the pad unit DPP A data signal may be supplied to the data line of each pixel and a gate control signal may be supplied to the gate driving circuit.

As another example, the driving integrated circuit 333 may not be mounted on the flexible circuit film 331, but may be mounted on the non-display area NA of the display panel 300. In this case, the gate driving circuit unit GDC and the pixel array unit 312 are mounted on the chip mounting area defined on the flexible substrate 311 and are electrically connected to the pad unit DPP. Each can be connected to the signal line. In this case, the flexible circuit film 331 may function to relay signal transmission between the pad unit DPP and the host driving system or may be omitted.

The flexible circuit board 335 may be electrically connected to the flexible circuit film 331. The flexible circuit board 335 according to an example is electrically connected to the film pad portion FPP provided on the flexible circuit film 331 by a film attaching process through an anisotropic conductive film, and the flexible display panel 300 It may be disposed to overlap the first back plate BP1. The flexible circuit board 335 provides image data and timing synchronization signals supplied from the host driving system to the driving integrated circuit 333 through the pad unit DPP, and the pixel array layer 312 and the gate driving circuit unit GDC ) And the driving integrated circuit 333 may provide a voltage required for driving each. The flexible circuit board 335 may also be expressed as a main flexible printed circuit board or a display driving circuit board.

The middle frame 500 may support the cover window 100 and cover the rear surface of the display panel 300. The middle frame 500 is disposed on the outermost side of a display device (or an electronic device having a display panel), and may include a plastic material or a metal material. In addition, the middle frame 510 may include a metal material having a color coating layer. The middle frame 500 according to an example may be made of a metal material having a relatively high thermal conductivity, for example, an aluminum material to improve heat dissipation performance of the display device.

The middle frame 500 according to an example may include a middle plate 510 and a middle side wall 530. The middle plate 510 may be formed to cover the rear surface of the display panel 300. In this case, the middle plate 510 includes at least one opening through which a cable for electrical connection between the host driving system and the driving circuit unit 330 passes, and at least one opening in which various electronic circuit components mounted on the display device are disposed. It may include a recess or the like. For example, the middle plate 510 may include a circuit arrangement groove 511 that is concavely implemented so that the driving circuit unit 330 disposed at the rear edge of the display panel 300 is disposed.

The middle sidewall 530 may be vertically coupled to the side surface of the middle plate 510 to support the sidewall portion 130 of the cover window 100. For example, the middle side wall 530 may be coupled to the side wall portion 130 of the cover window 100 via a double-sided tape or a waterproof tape. In this case, the waterproof performance of the display device is improved and foreign matter penetration, etc. Can be prevented.

The display device according to the first exemplary embodiment of the present application may further include a back cover 700 covering the rear surface (or rear surface) of the middle frame 500. The back cover 700 is coupled to the middle side wall 530 so as to face the rear surface of the middle plate 510, thereby covering the rear surface (or rear surface) of the middle frame 500, and a circuit storage space at the rear of the middle frame 500 ( 701). The circuit storage space 701 is provided between the middle plate 510 of the middle frame 500 and the back cover 700 to accommodate a host driving system, a memory, and a battery. The back cover 700 is detachably coupled to the middle side wall 530 for battery replacement due to battery discharge while the electronic device is in use, or is combined with the middle side wall 530 to be detachable only when disassembling for repair of the electronic device. Can be. As such, the back cover 700 is disposed on the outermost rear surface of the electronic device and may include a plastic material, a metal material, or a glass material. For example, the back cover 700 may include a glass material having a color coating layer.

Referring to FIG. 3, the heat dissipation sheet 320 and the bending fixing member 350 are disposed on the lower surface of the display area AA of the display panel 300. For example, it may be attached to the lower surface of the first back plate BP1. The heat dissipation sheet 320 and the bending fixing member 350 may be attached in different processes, respectively. Accordingly, a space 1000 may be generated between the heat dissipation sheet 320 and the bending fixing member 350. The spacing space 1000 may be due to a process error inevitably occurring in a process of attaching the heat dissipation sheet 320 and the bending fixing member 350.

In such a structure, external light incident on the display device from the front surface of the cover window 100 may be reflected by the heat dissipation sheet 320 and the bending fixing member 350. In addition, external light may be reflected by a component disposed under the spaced space 1000. In this case, the light reflectance of the heat dissipation sheet 320 and the bending fixing member 350 and the light reflectance of the components disposed under the spacing space 1000 may be different from each other. In particular, when the second back plate BP2 is disposed in the separation space 1000, the light reflectance in the heat dissipation sheet 320 and the bending fixing member 350 and the second back plate exposed by the separation space 1000 The light reflectance of (BP2) may be severely different. Therefore, when viewed from the front of the cover window 100, the spaced space 1000 may be recognized as a thin line.

In order to prevent such a problem, in the first embodiment of the present application, it is preferable to configure the second back plate BP2 to be limited and disposed within the area of the bending fixing member 350. In other words, the first side 351 of the bending fixing member 350 attached to the end of the lower surface of the display area AA coincides with the first side B11 of the first back plate BP1, and the bending fixing member The second side 352 of 350 may be disposed to be spaced apart from the end of the heat dissipation sheet 320. A space 1000 is formed between the second side 352 of the bending fixing member 350 and the end of the heat dissipating sheet 320. At this time, the first side (B21) of the second back plate (BP2) is attached so as to match the first side (351) of the bending fixing member (350) and the first side (B11) of the first back plate (BP1). Can be. In addition, it is preferable that the second side B22 of the second back plate BP2 is attached so as not to deviate from the second side 352 of the bending fixing member 350. That is, a separation distance D may be set between the second side B22 of the second back plate BP2 and the second side 352 of the bending fixing member 350.

In such a structure, external light incident on the separation space 1000 does not meet the first back plate BP1. Further, most of the external light incident on the separation space 1000 proceeds into the circuit arrangement groove 511, which is a space between the middle frame 500 and the middle frame 500. As a result, the reflectance is lowered, and thus the reflectance of light in the heat dissipation sheet 320 and the bending fixing member 350 may be substantially similar. Accordingly, in the structure according to the first embodiment of the present application, when viewed from the front surface of the cover window 100, the spaced space 1000 is not recognized, so that good display quality can be provided.

Hereinafter, a specific structure of the heat dissipation sheet 320 according to the first embodiment of the present application will be described with reference to FIG. 4. 4 is a cross-sectional view showing the structure of a heat dissipation sheet according to an embodiment of the present application. In FIG. 4, an upper arrow indicates that the display panel 300 is attached in that direction, and a lower arrow indicates that the middle frame 500 is positioned in that direction.

Referring to FIG. 4, the heat dissipation sheet 320 may be implemented to include a metal layer for dissipating heat transferred from the display panel 300. The heat radiation sheet 320 according to an example may include a heat radiation layer 320a, a cushion sheet 320b, and an adhesive layer 320c.

The heat dissipation layer 320a may include a metal material having a relatively high thermal conductivity. The heat dissipation layer 320a according to an example may include a metal layer such as copper or aluminum. The heat dissipation layer 320a according to another example may include a metal layer such as copper or aluminum, and a graphite layer coated on the metal layer. The heat dissipation layer 320a may absorb heat generated in the entire area of the display panel 300 and discharge heat into the atmosphere at the rear surface.

The cushion sheet 320b may function to alleviate an impact by being coupled to one surface of the heat dissipation layer 320a. The cushion sheet 320b according to an example may be a double-sided foam adhesive tape or a double-sided foam adhesive pad.

The adhesive layer 320c may be coupled to one surface of the cushion sheet 320b. The adhesive layer 320c according to an example may include a first surface S1 adhered to one surface of the cushion sheet 320b and a second surface S2 opposite to the first surface S1. The second surface S2 of the adhesive layer 320c may include an uneven structure (or an embossing structure).

The uneven structure of the adhesive layer 320c prevents bubbles from being generated between the display panel 300 and the heat dissipation sheet 320 in the process of attaching the heat dissipation sheet 320 to the rear (or rear) of the display panel 300 Accordingly, it is possible to omit a defoaming process for removing air bubbles generated between the display panel 300 and the heat dissipation sheet 320. For example, in the uneven structure of the adhesive layer 320c, the heat dissipation sheet 320 may be disposed on the rear surface of the first back plate BP1 of the display panel 300. In addition, in the process of attaching the heat dissipation sheet 320 to the rear surface of the first back plate BP1, air bubbles are prevented between the first back plate BP1 and the adhesive layer 320c of the heat dissipation sheet 320. can do.

In FIG. 4, the adhesive layer 320c of the heat dissipation sheet 320 is adhered to the display panel 300. In FIG. 4, a thick arrow indicates a path through which heat generated from the display panel 300 attached to the adhesive layer 320c is discharged to the outside through the cushion sheet 320b and the heat dissipation layer 320a.

Both the heat dissipation sheet 320 and the bending fixing member 350 may be attached to the lower surface of the first back plate BP1. The adhesive layer 320c of the heat dissipation sheet 320 may be attached to the lower surface of the first back plate BP1. For example, it may be disposed to overlap the display area AA. The bending fixing member 350 may be attached to the lower surface of the first back plate BP1 at one side adjacent to the heat dissipating sheet 320.

The bending fixing member 350 according to an example may be a double-sided tape. For example, the bending fixing member 350 may be a flexible double-sided tape. The bending fixing member 350 according to another example may include a fixing bar having a bar shape, a front adhesive layer formed on the front surface of the fixing bar, and a rear adhesive layer formed on the rear surface of the fixing bar. In this case, the fixing bar may be made of a rigid material such as plastic, but is not limited thereto.

<Second Example>

Hereinafter, a second embodiment of the present application will be described with reference to FIGS. 5 and 6. 5 is a plan view illustrating a structure of a display device including a heat dissipation sheet and a bending fixing member according to a second exemplary embodiment of the present application. 6 is a cross-sectional view taken along line III-III' shown in FIG. 5.

FIG. 5 is a plan view as viewed from the rear of the display device, showing a display panel, a heat dissipation sheet attached to the rear surface, and a bending fixing member for convenience. 5 and 6, the display device according to the second exemplary embodiment of the present application includes a cover window 100, a display panel 300, a heat dissipation sheet 320, a driving integrated circuit 333, and a bending fixing member. 350, a middle frame 500 and a back cover 700 may be included.

The display panel according to the second exemplary embodiment illustrated in FIG. 5 is substantially similar to the display panel according to the first exemplary embodiment. However, there is a difference in the arrangement relationship between the heat dissipation sheet and the bending fixing member. Therefore, the following description will focus on the differences. Components not described among the reference numerals shown in the drawings can be easily understood with reference to the description of the first embodiment.

Referring to FIG. 5, the display device according to the second embodiment of the present application includes a cover window 100, a display panel 300, a heat dissipation sheet 320, a driving integrated circuit 333, and a bending fixing member 350. , A middle frame 500 and a back cover 700 may be included.

The cover window 100 may be a transparent protective substrate covering the display device. Specifically, by covering the front and side surfaces of the display panel 300, the cover window 100 may provide image information without distortion and protect the display panel 300 from external impacts.

The display panel 300 may be attached to the rear surface of the cover window 100. The display panel 300 may include a display area AA for displaying an image and a non-display area NA disposed adjacent to the display area AA. In FIG. 5, for convenience, a case in which the non-display area NA is disposed only on the lower side of the display area AA facing the notch portion is illustrated.

A driving integrated circuit 333 is disposed in the non-display area NA. Since the non-display area AA is bent toward the rear, the non-display area AA is not recognized from the front surface of the cover window 100 or the area ratio occupied by the entire area of the cover window 100 can be minimized. The driving integrated circuit 333 may be a device that drives display devices formed on the display panel 300.

A heat radiation sheet 320 may be adhered to the rear surface of the display panel 300. The heat dissipation sheet 320 has a size corresponding to the display panel 300 and may have a similar shape. In addition, the heat dissipation sheet 320 may have an open portion OPN from which a portion of the lower side where the driving integrated circuit 333 is disposed is removed. The open part OPN may have a structure surrounded by three sides forming a'∩' shape by removing a part of the central area of the lower side from the heat dissipation sheet 320. The open part OPN of the heat dissipation sheet 320 may be a region overlapping the driving integrated circuit 333.

A bending fixing member 350 may be attached to an open portion formed on the lower side of the heat dissipating sheet 320. The bending fixing member 350 may be a means for fixing one end of the display panel 300 on which the driving integrated circuit 333 is disposed by bending the non-display area NA of the display panel 300 to the rear surface. The bending fixing member 350 may be a means to bend the non-display area NA of the display panel 300 to the rear surface and fix it to the rear surface of the display panel 300. For example, the first back plate BP1 may be disposed on the rear surface of the display panel 300. In addition, the second back plate BP2 may be disposed to be spaced apart from the first back plate BP1. A region where the first back plate BP1 and the second back plate BP2 are spaced apart from each other may be defined as the panel bending part 300d. By bending the panel bending part 300d of the display panel 300, the second back plate BP2 attached to the rear surface of the display panel 300 faces the first back plate BP1. In addition, the bending fixing member 350 may be a means for fixing the second back plate BP2 to the first back plate BP1 by bending the panel bending part 300d of the display panel 300.

The non-display area NA is bent to the rear, so that one end of the flexible substrate 311 on which the driving integrated circuit 333 is disposed may be fixedly attached to the rear surface of the display area AA by the bending fixing member 350. The non-display area NA on which the driving integrated circuit 333 is mounted may be disposed under the lower surface of the bending fixing member 350. Accordingly, the bending fixing member 350 may fix and maintain the bending state of the display panel 300.

The bending fixing member 350 is disposed to partially overlap the end side of the heat dissipation sheet 320, thereby forming the overlapping portion 1100. Specifically, the three sides surrounding the open portion OPN of the heat dissipation sheet 320 may overlap the three sides of the bending fixing member 350, respectively. This overlapping region may be referred to as an overlapping portion 1100. Accordingly, in the second embodiment, unlike the first embodiment, a separation space does not occur between the bending fixing member 350 and the heat dissipating sheet 320, even if process errors are considered.

Since the heat dissipation sheet 320 and the bending fixing member 350 are continuously arranged by the overlapping portion 1100 without a spaced space, the degree of reflection of external light incident from the outside of the cover window 100 is constant. Therefore, no light leakage is recognized from the front surface of the display device.

Hereinafter, a structure of a display device including a heat dissipating sheet and a bending fixing member according to a second exemplary embodiment of the present application will be described in more detail with reference to FIG. 6. FIG. 6 is a cross-sectional view, which is a detailed diagram illustrating components not seen in FIG. 5 which is a plan view.

In FIG. 6, for convenience, the entire display panel 300 is not illustrated, but only the flexible substrate 311 is illustrated. A first back plate BP1 and a second back plate BP2 are attached to the lower surface of the display panel 300. The first back plate BP1 may be disposed to correspond to the display area AA. The second back plate BP2 may be spaced apart from the first back plate BP1 by a predetermined distance and may be disposed in the non-display area NA. The first side B21 of the second back plate BP2 faces the first side B11 of the first back plate BP1. The second side B22 of the second back plate BP2 may coincide with the end surface of the display panel 300.

A portion of the display panel 300 separated from the first back plate BP1 and the second back plate BP2 is the panel bending part 300d. The panel bending part 300d maintains the flexibility of the flexible substrate 311 as it is, so it can be easily bent. The panel bending part 300d may be bent to place the second back plate BP2 under the first back plate BP1.

The heat dissipation sheet 320 and the bending fixing member 350 may be attached to the lower surface of the first back plate BP1. The adhesive layer 320c of the heat dissipation sheet 320 may be attached to the lower surface of the first back plate BP1. For example, it may be disposed to overlap the display area AA. The bending fixing member 350 may be attached to the lower surface of the first back plate BP1 at one side adjacent to the heat dissipating sheet 320. As shown in FIG. 5, the bending fixing member 350 may be attached to the open portion OPN formed at the lower end of the heat dissipating sheet 320. The bending fixing member 350 may be attached to the first back plate BP1 exposed by the open part OPN of the heat dissipation sheet 320.

The heat radiation sheet 320 according to the second embodiment may include a thick film portion THC and a thin film portion THN. For example, the thick film portion THC is a portion of the normal heat dissipation sheet 320, that is, a portion maintaining the laminated structure shown in FIG. 4 and corresponds to most of the heat dissipation sheet 320. The thin film part THN may be defined as a part of the heat dissipation sheet 320 from which some thickness of the heat dissipation sheet 320 has been removed from an end adjacent to the open part OPN. The thin film part (THN) is made thinner than the thick film part (THC) which is the intact heat dissipation sheet 320 by removing the heat dissipation layer 320a from the heat dissipation sheet 320 and removing some thickness of the cushion sheet 320b. It means the formed part. In FIG. 5, a thin film portion THN may be formed along three sides of the heat dissipation sheet 320 surrounding the open portion OPN.

The bending fixing member 350 may overlap the thin film portion THN of the heat radiation sheet 320. In addition, the bending fixing member 350 may have a bracket shape or an'L' shape in which the left and right sides are inverted in a region overlapping the thin film portion THN of the heat dissipation sheet 320. For example, a bending fixing member 350 and an overlapping portion 1100 overlapping the thin film portion THN of the heat dissipating sheet 320 are provided. In addition, the bending fixing member 35 may include a patterning portion 350P corresponding to the overlapping portion 1100. The cross-sectional shape of the bending fixing member 350 provided with the patterning portion 350P is an upper surface 51, a first side surface 52, a second side surface 53, a lower surface 54, and a stepped surface 55. And it may include a stepped side (56). The patterning portion 350P has a constant depression thickness and may have a hexahedral shape extending inward a predetermined distance from the end of the bending fixing member 350.

The upper surface 51 may be a surface attached to the first back plate BP1. The first side surface 52 may be a surface disposed in an inward direction among two surfaces perpendicular to the upper surface 51. The first side surface 52 may face the heat dissipation sheet 320. The second side surface 53 may be a surface disposed in an outward direction among two surfaces perpendicular to the upper surface 51. The second side 53 may coincide with the first side B11 of the first back plate BP1 and/or the first side B21 of the second back plate BP2.

The patterning part 350P may be a space surrounded by the stepped lower surface 55 and the stepped side surface 56. The stepped lower surface 55 is parallel to the upper surface 51 and may be a horizontal surface extending inward a predetermined distance from the end of the first side surface 52. The stepped side surface 56 may be a vertical surface parallel to the first side surface 52. The stepped side surface 56 may be a vertical surface connecting the inner end of the stepped lower surface 55 and the inner end of the upper surface 51.

The first side 52 and the second side 53 of the bending fixing member 350 are opposite to each other, but due to the patterning portion 350P, their lengths may be different from each other. For example, the height T1 of the first side surface 52 may be smaller than the height T2 of the second side surface. The difference between the height T2 of the second side surface 53 and the height T1 of the first side surface 52 corresponds to the thickness T3 of the patterning portion 350P. The thickness T3 of the patterning part 350P may be equal to or slightly thicker than the thickness of the thin film part THN of the heat dissipation sheet 320.

The lower surface 54 may be directly attached to the second back plate BP2. The width W2 of the lower surface 54 may be larger than the width W1 of the upper surface 51. The lower surface 54 is a surface facing the first upper surface 51 and may be a horizontal surface extending from the end of the second side surface 53 to the first side surface 52. The width W2 of the lower surface 54 may be equal to the sum of the width W1 of the upper surface 51 and the width W3 of the stepped surface 55. The width W3 of the stepped surface 55 may be equal to or smaller than the width of the thin film portion THN of the heat dissipating sheet 320.

The width W3 of the stepped surface 55 may define the width of the patterning portion 350P, and the height T3 of the stepped side surface 56 may define the thickness of the patterning portion 350P. The patterning portion 350P is attached to the lower surface of the first back plate BP1 so as to overlap and stack a portion of the thin film portion THN. In consideration of the process error, the width W3 of the stepped lower surface 55, which is the width of the patterning portion 350P, is preferably smaller than the width of the thin film portion THN. In addition, it is preferable that the height T3 of the stepped side surface 56, which is the depth of the patterning portion 350P, is greater than the thickness of the thin film portion THN.

The patterning part 350P formed on the bending fixing member 350 meshes with the thin film part THN of the heat dissipation sheet 320 to form an overlapping part 1100. Accordingly, in a portion where the bending fixing member 350 and the heat dissipating sheet 320 overlap, the thickness is not increased and the minimum thickness can be uniformly maintained. In addition, since external light incident from the front surface of the cover window 100 is reflected by the heat dissipation sheet 320 and the bending fixing member 350 having substantially uniform reflectivity, a light leakage problem due to a difference in reflectivity does not occur.

<Third Example>

Hereinafter, a third embodiment of the present application will be described with reference to FIGS. 5 and 7. 7 is a cross-sectional view taken along the perforation line III-III' shown in FIG. 5 and is a cross-sectional view showing the structure of a heat dissipating sheet and a bending fixing member according to a third embodiment of the present application. The display device according to the third embodiment has substantially the same structure as the display device according to the second embodiment. If there is a difference, the structure of the thin film portion of the heat dissipation sheet 320, the structure of the recessed portion of the bending fixing member 350, and the overlapping shape of the heat radiation sheet 320 and the bending fixing member 350 in the overlapping portion 1100 are formed. Hereinafter, referring mainly to FIG. 7, the overlapping structure will be described in detail.

The display device according to the third embodiment of the present application includes a display panel 300, a first back plate BP1, a second back plate BP2, a heat dissipation sheet 320, a bending fixing member 350, and a driving integrated device. Circuit 333. In FIG. 7, for convenience, the entire display panel 300 is not illustrated, but only the flexible substrate 311 is illustrated.

The first back plate BP1 is attached to the lower surface of the display area AA of the display panel 300. The second back plate BP2 is attached to the lower surface of the non-display area NA of the display panel 300. The first back plate BP1 and the second back plate BP2 are disposed at a predetermined distance apart. The panel bending portion 300d of the display panel 300 exposed therebetween is bent, so that the second back plate BP2 overlaps the first back plate BP1 with the bending fixing member 350 therebetween. do. The driving integrated circuit 333 may be mounted on the upper surface of the display panel 300 to which the second back plate BP2 is attached. The driving integrated circuit 333 may be fixedly attached by the bending fixing member 350 with the second back plate BP2 interposed therebetween.

A heat radiation sheet 320 is attached to the lower surface of the first back plate BP1. The heat dissipation sheet 320 includes a thick film portion THC and a thin film portion THN. The thin film portion THN surrounds the open portion OPN. In particular, the thin film portion THN has a first inclined surface 320d extending a predetermined length toward the open portion OPN from the end of the thick film portion THC.

A bending fixing member 350 is attached to the lower surface of the first back plate BP1 exposed by the open part OPN formed in the heat dissipation sheet 320. Particularly, a part of the bending fixing member 350 is disposed to overlap the thin film portion THN of the heat dissipating sheet 320. The bending fixing member 350 has a patterning portion 350P corresponding to the thin film portion THN. For example, the patterning part 350P may have a second inclined surface 350a corresponding to the first inclined surface 320d forming the thin film portion THN of the heat dissipating sheet 320.

Specifically, the bending fixing member 350 may include an upper surface 51, a first side surface 52, a second side surface 53, a lower surface 54, and a second inclined surface 57. The upper surface 51 may be a surface attached to the first back plate BP1. The first side surface 52 may be disposed in an inward direction among two surfaces perpendicular to the upper surface 51, and may be a vertical surface facing the heat dissipation sheet 320. The second side surface 53 may be a vertical surface disposed in an outward direction among two surfaces perpendicular to the upper surface 51. The second side 53 may be a vertical surface disposed to coincide with the first side B11 of the first back plate BP1 and/or the first side B21 of the second back plate BP2.

Although the first side 52 and the second side 53 face each other, their lengths may be different due to the patterning part 350P. For example, the end of the first side 52 and the end of the second side 53 may be connected by the second inclined surface 57. In particular, the slope of the second slope 57 provided by the bending fixing member 350 may correspond to the slope of the first slope 320d provided by the thin film portion THN of the heat dissipation sheet 320.

The first inclined portion 320d of the heat dissipating sheet 320 and the second inclined portion 57 of the bending fixing member 350 are disposed to overlap each other, so that an overlapping portion 1100 is formed in the open portion OPN. Accordingly, in a portion where the bending fixing member 350 and the heat dissipating sheet 320 overlap, the thickness is not increased and the minimum thickness can be uniformly maintained. In addition, since external light incident from the front surface of the cover window 100 is reflected by the heat dissipation sheet 320 and the bending fixing member 350 having substantially uniform reflectivity, a light leakage problem due to a difference in reflectivity does not occur.

<Fourth Example>

Hereinafter, a fourth embodiment of the present application will be described with reference to FIGS. 5 and 8. 8 is a cross-sectional view illustrating a structure of a heat dissipating sheet and a bending fixing member according to a fourth embodiment of the present application. The display device according to the fourth embodiment has almost the same structure as the display device according to the second embodiment. The difference is that the open portion is not formed, and the thin film portion THN has a shape covering the entire area of the open portion.

The display device according to the fourth exemplary embodiment of the present application includes a display panel 300, a first back plate BP1, a second back plate BP2, a heat dissipation sheet 320, a bending fixing member 350, and driving integration. Circuit 333. In FIG. 8, for convenience, the entire display panel 300 is not shown, but only the flexible substrate 311 is shown.

The first back plate BP1 is attached to the lower surface of the display area AA of the display panel 300. The second back plate BP2 is attached to the lower surface of the non-display area NA of the display panel 300. The first back plate BP1 and the second back plate BP2 are disposed at a predetermined distance apart. The panel bending portion 300d of the display panel 300 exposed therebetween is bent, so that the second back plate BP2 overlaps the first back plate BP1 with the bending fixing member 350 therebetween. do. The driving integrated circuit 333 may be mounted on the upper surface of the display panel 300 to which the second back plate BP2 is attached. The driving integrated circuit 333 may be fixedly attached by the bending fixing member 350 with the second back plate BP2 interposed therebetween.

A heat radiation sheet 320 is attached to the lower surface of the first back plate BP1. The heat dissipation sheet 320 includes a thick film portion THC and a thin film portion THN. For example, the thick film portion THC is a portion maintaining the normal configuration of the heat dissipation sheet 320, that is, the laminated structure shown in FIG. 4 and corresponds to most of the heat dissipation sheet 320. The thin film part THN is a region corresponding to the open part OPN of the heat dissipation sheet 320 formed in the first embodiment, and may be defined as a part from which a partial thickness of the heat dissipation sheet 320 is removed. The thin film part (THN) is made thinner than the thick film part (THC) which is the intact heat dissipation sheet 320 by removing the heat dissipation layer 320a from the heat dissipation sheet 320 and removing some thickness of the cushion sheet 320b. It means the formed part. In FIG. 5, the thin film portion THN may be formed over the entire area described as the open portion OPN.

In this case, the bending fixing member 350 may be stacked on the thin film portion THN of the heat dissipating sheet 320. That is, the bending fixing member 350 is not directly attached to the rear surface of the first back plate BP1. In this structure, in the area where the driving integrated circuit 333 is disposed, the thin film portion THN and the bending fixing member 350 are stacked between the first back plate BP1 and the second back plate BP2. It may have a slightly thicker thickness than the other embodiments described. In order to keep the thickness of the portion where the bending fixing member 350 is disposed as thin as possible, it is preferable to form the thin film portion THN in the heat dissipating sheet 320 as thin as possible. In addition, when considering the error in the manufacturing process, it is preferable that the width of the thin film portion THN of the heat dissipation sheet 320 is slightly larger than the width of the bending fixing member 350.

The bending fixing member 350 is directly laminated and attached to the thin film portion THN of the heat dissipating sheet 320. In this structure, since external light incident from the front surface of the cover window 100 is reflected only by the heat dissipation sheet 320, a light leakage problem due to a difference in reflectivity does not occur. Compared with other embodiments, the thickness of the portion where the bending fixing member 350 is disposed is slightly thicker, but since the heat dissipation sheet 320 does not have an open portion and covers the entire cover window 100, there is a light leakage problem. Can be prevented more completely.

A display device according to an exemplary embodiment of the present invention includes a display area AA, a non-display area NA, a heat dissipation sheet 320, a driving circuit unit 330, and a bending fixing member 350. The non-display area NA is extended and bent from one end of the display area AA, and is disposed under the display area AA. The heat dissipation sheet 320 is disposed on the rear surface of the display area AA, and includes an open portion OPN formed on the lower surface of one end of the display area AA. The driving circuit unit 330 is disposed in the non-display area NA. The bending fixing member 350 corresponds to the open portion OPN, and is disposed such that one side overlaps a part of the end side of the heat dissipation sheet 320 and the central portion overlaps the driving circuit portion 330.

For example, the heat dissipation sheet 320 includes a thick film portion THC and a thin film portion THN. The thick film portion THC corresponds to the display area AA and has a uniform first thickness. The thin film portion THN is disposed on an end side surrounding the open portion OPN and has a second thickness thinner than that of the thick film portion THC. One side of the bending fixing member 350 is disposed to overlap the thin film portion THN.

For example, the thin film part THN extends a predetermined distance from the thick film part THC to the open part OPN with a second thickness.

For example, the thin film portion THN is disposed to extend over the entire open portion OPN. The entire bending fixing member 350 is disposed to overlap the thin film portion THN.

For example, the bending fixing member 350 includes a patterning portion 350P corresponding to the thin film portion THN. The patterning part 350P overlaps the thin film part THN, and a region excluding the recessed part 351 is disposed corresponding to the display panel 300 exposed to the open part OPN.

As an example, the thin film part THN extends from the thick film part THC to the open part OPN by a certain distance, and is linearly thinner from the first thickness of the thick film part THC to the minimum thickness according to a certain distance. It has 1 inclined surface 320d.

For example, the bending fixing member 350 is disposed to overlap with a partial region of the thin film portion THN.

As an example, the bending fixing member 350 further includes a patterning portion 350P removed corresponding to the thin film portion THN, and the level of the step of the patterning portion 350P corresponds to a change in the thickness of the thin film portion THN. It has a second inclined surface 57 that changes linearly.

For example, an end of the non-display area NA including the driving circuit unit 330 and bent and disposed under the display area AA is located inside the bending fixing member 350 area.

In addition, the display device according to an exemplary embodiment of the present invention includes a display area AA, a non-display area NA, a heat dissipation sheet 320, a driving circuit unit 330, and a bending fixing member 350. The non-display area NA is extended and bent from one end of the display area AA, and is disposed under the display area AA. The heat dissipation sheet 320 is disposed on the rear surface of the display area AA, and includes an open portion OPN on the lower surface of one end of the display area AA. The driving circuit unit 330 is disposed in the non-display area AA. The bending fixing member 350 corresponds to the inside of the open portion OPN, and is disposed so that one side thereof is spaced apart from the end side of the heat dissipation sheet 320 by a predetermined distance, and the central portion overlaps the driving circuit unit 330.

For example, an end of the non-display area NA including the driving circuit unit 330 and bent and disposed under the display area AA is located inside the bending fixing member 350 area.

For example, the heat radiation sheet 320 includes an adhesive layer 320c, a heat radiation layer 320a, a cushion sheet 320b, and a thin film portion THN. The adhesive layer 320c is disposed toward the display area AA. The heat dissipation layer 320a is disposed toward the driving circuit unit 330. The cushion sheet 320b is interposed between the adhesive layer 320c and the heat dissipation layer 320a. In the thin film portion THN, the adhesive layer 320c and the cushion sheet 320b extend from the edge of the heat dissipation layer 320a to cover the entire open portion OPN. The bending fixing member 350 overlaps the thin film portion THN.

As an example, the bending fixing member 350 further includes a recessed portion 350a formed on a side opposite to the heat dissipating sheet 320. The heat radiation sheet 320 includes an adhesive layer 320c, a heat radiation layer 320a, a cushion sheet 320b, and a thin film portion THN. The adhesive layer 320c is disposed toward the display area AA. The heat dissipation layer 320a is disposed toward the driving circuit unit 330. The cushion sheet 320b is interposed between the adhesive layer 320c and the heat dissipation layer 320a. In the thin film portion THN, the adhesive layer 320c and the cushion sheet 320b extend from the end of the heat dissipation layer 320a to overlap the patterning portion 350P of the bending fixing member 350. The bending fixing member 350 is stacked and disposed on the thin film portion THN.

As an example, the thin film portion THN has a first inclined surface 320d whose thickness is linearly thinned at the edge of the heat dissipation sheet 320. The patterning portion 350P has a second inclined surface 57 corresponding to the first inclined surface 320d of the thin film portion THN.

For example, the patterning portion 350P has a constant step thickness and has a hexahedral shape extending inward a predetermined distance from the end of the bending fixing member 350. The thin film part THN extends so as to overlap with the patterning part 350P at the edge of the heat dissipation sheet 320.

Features, structures, effects, and the like described in the examples of the present application described above are included in at least one example of the present application, and are not necessarily limited to only one example. Further, the features, structures, effects, etc. exemplified in at least one example of the present application may be combined or modified for other examples by a person having ordinary knowledge in the field to which this application belongs. Accordingly, contents related to such combinations and modifications should be construed as being included in the scope of the present application.

The present application described above is not limited to the above-described embodiment and the accompanying drawings, and that various substitutions, modifications, and changes are possible within the scope of the technical matters of the present application. It will be obvious to those who have the knowledge of. Therefore, the scope of the present application is indicated by the claims to be described later, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present application.

100: cover window 300: display panel
AA: display area NA: non-display area
320: heat dissipation sheet 350: bending fixing member
333: driving integrated circuit BP1: first back plate
BP2: second back plate 500: middle frame
700: back cover OPN: open portion
320a: adhesive layer 320b: cushion sheet
320c: heat dissipation layer 320d: first inclined surface
350P: patterning portion 57: second slope
THC: thick film part THN: thin film part

Claims (15)

Display area;
A non-display area extending from one end of the display area and bending the non-display area disposed below the display area;
A heat dissipating sheet disposed on a rear surface of the display area and having an open portion on a bottom surface of the one end of the display area;
A driving circuit part disposed in the non-display area; And
A display device comprising: a bending fixing member corresponding to the open portion, one side overlapping a portion of an end side of the heat dissipating sheet, and a central portion overlapping the driving circuit portion.
The method of claim 1,
The heat dissipation sheet,
A thick film portion corresponding to the display area and having a uniform first thickness; And
It is disposed on an end side along the open portion, and has a thin film portion having a second thickness thinner than the thick portion,
The one side of the bending fixing member is disposed to overlap the thin film portion.
The method of claim 2,
The thin film part,
A display device extending a predetermined distance from the thick film portion to the open portion with the second thickness.
The method of claim 3,
The thin film portion is disposed to extend over the entire open portion,
A display device in which the entire bending fixing member is disposed to overlap the thin film portion.
The method of claim 3,
The bending fixing member,
It has a patterning part corresponding to the thin film part,
The patterning portion overlaps the thin film portion, and an area excluding the patterning portion is disposed to correspond to the display panel exposed to the open portion.
The method of claim 2,
The thin film part,
A display device extending from the thick film portion to the open portion by a predetermined distance and linearly thinning from the first thickness of the thick film portion to a minimum thickness according to the predetermined distance.
The method of claim 6,
The bending fixing member,
A display device disposed to overlap with a partial region of the thin film part.
The method of claim 7,
The bending fixing member,
A display device further comprising a patterning portion removed corresponding to the thin film portion, wherein a level of a step difference of the patterning portion linearly changes in response to a thickness change of the thin film portion.
The method of claim 1,
A display device having the driving circuit unit, and an end of the non-display area that is bent and disposed under the display area is located inside the bending fixing member area.
Display area;
A non-display area extending from one end of the display area and bending the non-display area disposed below the display area;
A heat dissipating sheet disposed on a rear surface of the display area and having an open portion on a bottom surface of the one end of the display area;
A driving circuit part disposed in the non-display area;
A display device including a bending fixing member corresponding within the open portion, one side of which is spaced apart from an end edge of the heat dissipation sheet by a predetermined distance, and a central portion overlapping the driving circuit portion.
The method of claim 10,
A display device having the driving circuit unit, and an end of the non-display area that is bent and disposed under the display area is located inside the bending fixing member area.
The method of claim 10,
The heat dissipation sheet,
An adhesive layer facing the display area;
A heat dissipation layer facing the driving circuit;
A cushion sheet interposed between the adhesive layer and the heat dissipation layer; And
The adhesive layer and the cushion sheet extend from the end of the heat dissipation layer to include a thin film portion covering the entire open portion,
The bending fixing member overlaps the thin film portion.
The method of claim 10,
The bending fixing member further includes a patterning portion formed on a side opposite to the heat dissipation sheet,
The heat dissipation sheet,
An adhesive layer facing the display area;
A heat dissipation layer facing the driving circuit;
A cushion sheet interposed between the adhesive layer and the heat dissipation layer; And
The adhesive layer and the cushion sheet extend from the end of the heat dissipation layer to include a thin film portion overlapping the patterning portion of the bending fixing member,
The bending fixing member is stacked and disposed on the thin film portion.
The method of claim 13,
The thin film part,
It has a first inclined surface that is linearly thinner in thickness at the end of the heat dissipation sheet,
The patterning part,
A display device having a second inclined surface corresponding to the first inclined surface of the thin film part.
The method of claim 13,
The patterning part,
The step thickness is constant and has a hexahedral shape extending inward a certain distance from the end of the bending fixing member,
The thin film part,
A display device extending from an end of the heat dissipation sheet to overlap the patterning portion.

Images