KR20240037224A - Organic light emitting display device - Google Patents

Abstract

An organic light emitting display device according to an embodiment of the present specification includes a plastic substrate including a flat area and a bending area, a backplate disposed below the plastic substrate, an adhesive layer disposed below the backplate, and a lower portion of the adhesive layer. It includes a heat dissipation member disposed, wherein the heat dissipation member includes a first part corresponding to the bending area and a second part excluding the first part, and the first part includes a plurality of trenches to facilitate bending of the bending area. , the plurality of trenches may be arranged parallel to the bending axis of the bending area, and the adhesive layer may be arranged to overlap the first and second parts of the heat dissipation member. Through this, when the organic light emitting display device is bent, the heat dissipation member can be prevented from being separated due to bending stress.

Description

Organic light emitting display device {ORGANIC LIGHT EMITTING DISPLAY DEVICE}

This specification relates to an organic light emitting display device.

Recently, displays with excellent characteristics such as thinner, lighter, and lower power consumption have been widely developed and applied to various fields.

Organic Light Emitting Display (OLED device), also called organic electroluminescent diode display or organic electroluminescent display device, is a light emitting layer formed between the cathode, which is an electron injection electrode, and the anode, which is a hole injection electrode. It is a device that emits light by injecting charge into an exciton and then annihilating it by combining electrons and holes. These organic light emitting display devices can be formed on flexible substrates such as plastic, and because they are self-emitting, they have a high contrast ratio and have a response time of several microseconds (㎲), making it possible to implement moving images. It is easy to use, has no viewing angle limitations, is stable even at low temperatures, and can be driven at a relatively low voltage of 5V to 15V DC, making it easy to manufacture and design the driving circuit.

Organic light emitting display devices can be divided into passive matrix type and active matrix type depending on the driving method. Applications and usage environment of active organic light emitting display devices that have low power consumption, high resolution, large size, and various designs. Things are changing in various ways. For example, it can be applied to various fields such as TVs, monitors, and vehicle display devices as well as mobile devices such as smart watches, mobile phones, ultra mobile PCs, e-books, and e-newspapers. And display panels are also changing from the traditional square or rectangular shape to not only curved but also circular.

Recently, research is being conducted to apply organic light emitting display devices to automotive displays. In order to be applied as a vehicle display device, it must be possible to produce not only square, circular, and oval shapes, but also 3D shapes such as curved shapes to suit the interior design. In addition, the environment inside a vehicle has extremely high temperatures, extremely low temperatures, and humidity that are much higher than the environment inside a building where a TV or monitor is used, or the environment where a mobile phone is used, so the reliability standards for vehicle display devices are at a very high level. Due to this usage environment, in-depth research is being conducted to improve/change the structure, operation, and function of organic light emitting display devices for vehicles.

The purpose of this specification is to propose a structure for improving the device lifespan of an organic light emitting display device used as a vehicle display device. In particular, embodiments of the present specification present a structure that can suppress shortening of device lifespan due to heat generation in a display device.

The tasks of this specification are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the purpose as described above, the organic light emitting display device according to an embodiment of the present specification includes a plastic substrate including a flat area and a bending area, a backplate disposed below the plastic substrate, and a bottom of the backplate. It includes an adhesive layer disposed and a heat dissipation member disposed below the adhesive layer, wherein the heat dissipation member includes a first part corresponding to the bending area and a second part excluding the first part, and the first part is a bend of the bending area. It may include a plurality of trenches that facilitate, the plurality of trenches may be arranged parallel to the bending axis of the bending area, and the adhesive layer may be arranged to overlap the first part and the second part of the heat dissipation member.

An organic light emitting display device according to another embodiment of the present specification includes a plastic substrate including a plurality of planar regions and a curved region disposed between the planar regions, a heat dissipation member disposed below the plastic substrate, and a planar region and a heat dissipation member on the heat dissipation member. It includes an adhesive layer arranged to overlap the curved area, the heat dissipation member includes a peeling prevention structure that prevents peeling of the adhesive layer in a portion corresponding to the curved area, and the peeling prevention structure includes a plurality of trenches, and a plurality of trenches. The trench may be arranged parallel to the bending axis of the curved area.

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

Embodiments of the present specification can provide a display device that includes a heat dissipation member to prevent shortening of device lifespan due to heat generation. In addition, it is possible to provide a structure that can prevent peeling of the heat dissipation member when bending the display device.

The effects according to the present invention are not limited to the contents exemplified above, and further various effects are included in the present specification.

1 is an exploded perspective view schematically showing an organic light emitting display device according to an embodiment of the present specification.
FIG. 2 is a cross-sectional view showing a portion of the display panel included in the organic light emitting display device of FIG. 1.
Figure 3 is a cross-sectional view schematically explaining an organic light emitting display device according to an embodiment of the present specification.
FIG. 4 is a diagram schematically showing an organic light emitting display device including a bending area.
Figure 5 is a plan view showing a heat dissipation member according to another embodiment of the present specification.
Figure 6 is a cross-sectional view taken along line II' of Figure 5.
Figure 7 is another cross-sectional view taken along line II' of Figure 5.

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

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are illustrative, and the present invention is not limited to the matters shown. Like reference numerals refer to like elements throughout the specification. Additionally, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. When 'includes', 'has', 'consists of', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the plural is included unless specifically stated otherwise.

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

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

When an element or layer is referred to as “on” another element or layer, it includes instances where the other layer or other element is directly on top of or interposed between the other elements.

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

Like reference numerals refer to like elements throughout the specification.

The size and thickness of each component shown in the drawings are shown for convenience of explanation, and the present invention is not necessarily limited to the size and thickness of the components shown.

Each feature of the various embodiments of the present invention can be partially or fully combined or combined with each other, and as can be fully understood by those skilled in the art, various technical interconnections and operations are possible, and each embodiment may be implemented independently of each other. It may be possible to conduct them together due to a related relationship.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the attached drawings.

1 is an exploded perspective view schematically explaining an organic light emitting display device according to an embodiment of the present invention.

Referring to FIG. 1, an organic light emitting display device 100 according to an embodiment of the present invention includes a display panel 110 that displays an image, a functional member 150, a cover member 130, a back plate 120, It may be composed of a heat dissipation member 140 and various mechanical parts (frame, case, etc.).

The organic light emitting display device 100 includes at least one active area, and an array of pixels is disposed in the active area. One or more inactive areas may be placed around the display area. That is, the non-display area may be adjacent to one or more sides of the display area. In Figure 1, the non-display area surrounds the rectangular display area. However, the shape of the display area and the shape/arrangement of the non-display area adjacent to the display area are not limited to the example shown in FIG. 1. The display area and non-display area may be in a form suitable for the design of an electronic device equipped with the organic light emitting display device 100. Exemplary shapes of the display area are pentagonal, hexagonal, circular, oval, etc.

Each pixel within the display area may include a pixel circuit. The pixel circuit may include one or more switching transistors and one or more driving transistors on a backplane. Each pixel circuit may be electrically connected to a gate line and a data line to communicate with one or more driving circuits, such as a gate driver and a data driver, located in a non-display area.

The driving circuit may be implemented with a thin film transistor (TFT) in the non-display area. This driving circuit may be referred to as a gate-in-panel (GIP). Additionally, some components, such as data driver ICs, are mounted on separate printed circuit boards and circuit films such as FPCB (flexible printed circuit board), COF (chip-on-film), TCP (tape-carrier-package), etc. It can be combined with a connection interface (pad/bump, pin, etc.) placed in a non-display area.

The organic light emitting display device 100 may include various additional elements for generating various signals or driving pixels within the display area. Additional elements for driving pixels may include an inverter circuit, multiplexer, electrostatic discharge (ESD) circuit, etc.

The organic light emitting display device 100 may also include additional elements related to functions other than pixel driving. For example, the organic light emitting display device 100 may include additional elements that provide a touch detection function, a user authentication function (e.g., fingerprint recognition), a multi-level pressure detection function, a tactile feedback function, etc. . The additional elements mentioned above may be located in a non-display area and/or in an external circuit connected to the connection interface.

The functional member 150 may be provided to reinforce mechanical/mechanical and optical characteristics required for the organic light emitting display device 100. The functional member 150 may also include additional elements associated with functions other than pixel driving. For example, the functional member 150 may include additional elements that provide a touch sensing function, a user authentication function (eg, fingerprint recognition), a multi-level pressure sensing function, a tactile feedback function, etc. Additionally, the functional member 150 may include a polarizer or a viewing angle control film that controls display characteristics (eg, external light reflection, color accuracy, luminance, etc.). To explain the viewing angle control film in more detail, if a display device is installed in a car to display images, it may reduce the driver's concentration and interfere with driving. Furthermore, the display device may be a vehicle-mounted device such as a navigation system. In this case, a problem may occur where the image displayed on the display device is reflected from the windshield of the car, interfering with the driver's field of vision. To solve this problem, the display device can prevent unnecessary propagation of light emitted by the display panel in a direction away from the viewing axis. In other words, when a viewing angle control film is provided, unnecessary light leakage in the side direction can be effectively blocked.

The cover member 130 is attached to protect the display panel 110 and the functional member 150 above it. The cover member 130 may be made of a transparent material (glass, plastic, etc.) so that the display area can be viewed. However, an opaque shielding part is provided on the cover member 130 in areas that do not want to be visible to the user (non-display areas, etc.). The cover member 130 is attached to the upper surface of the functional member 150 with a transparent adhesive such as OCA (Optical Clear Adhesive), thereby transmitting light emitted from the display panel 110 to the outside and protecting the display panel from external impact. 110) and functional members 150.

Since the display panel 110 is too thin, the backplate 120 is attached to the back of the display panel 110 to increase the strength and/or rigidity of the display panel 110, and is made of polyethylene naphthalate (PEN). ), polyethylene terephthalate (PET), polyethylene ether phthalate, polycarbonate, polyarylate, polyether imide, polyether sulfonate, It can be made of a thin film composed of polyimide, polyacrylate, or a combination of other suitable polymers. Other suitable materials that can be used to form the backplate 120 may be thin glass, dielectrically shielded metal foil, multilayer polymers, polymer films containing polymer materials in combination with nanoparticles or micro particles, etc. .

The organic light emitting display device according to an embodiment of the present specification may further include a heat dissipation member 140, which will be described in detail in FIG. 3 and below.

FIG. 2 is a cross-sectional view showing a portion of the display panel included in the organic light emitting display device of FIG. 1.

*The display panel 110 has a thin film transistor (TFT), an organic light emitting diode (OLED), and various functional layers located on the base layer 111.

The base layer 111 supports various components of the display panel 100. The base layer 111 may be formed of a transparent insulating material, such as glass or plastic. When the base layer 111 is made of plastic, it may be referred to as a plastic film or a plastic substrate. For example, the base layer 111 may be in the form of a film containing one selected from the group consisting of polyimide-based polymer, polyester-based polymer, silicone-based polymer, acrylic polymer, polyolefin-based polymer, and copolymers thereof. Among these materials, polyimide is widely used as a plastic substrate because it can be applied to high-temperature processes and can be coated. The substrate (array substrate) is also referred to as a concept that includes elements and functional layers formed on the base layer 111, such as a switching TFT, a driving TFT connected to the switching TFT, an organic light emitting device connected to the driving TFT, a protective film, etc. .

A buffer layer may be located on the base layer 111. The buffer layer is a functional layer to protect the thin film transistor (TFT) from impurities such as alkali ions leaking from the base layer 111 or lower layers. The buffer layer may be made of silicon oxide (SiOx), silicon nitride (SiNx), or multiple layers thereof.

A thin film transistor (TFT) is disposed on the base layer 111 or the buffer layer. A thin film transistor (TFT) may have a semiconductor layer (ACT), a gate insulating film 112, a gate electrode (GE), an interlayer insulating film 113, and source and drain electrodes (DE and SE) sequentially arranged. The semiconductor layer (ACT) is located on the base layer 111 or the buffer layer. The semiconductor layer (ACT) may be made of polysilicon (p-Si), in which case a predetermined region may be doped with impurities. Additionally, the semiconductor layer (ACT) may be made of amorphous silicon (a-Si) or may be made of various organic semiconductor materials such as pentacene. Furthermore, the semiconductor layer (ACT) may be made of oxide. The gate insulating film 112 may be formed of an insulating inorganic material such as silicon oxide (SiOx) or silicon nitride (SiNx), or may also be formed of an insulating organic material. The gate electrode (GE) is made of various conductive materials, such as magnesium (Mg), aluminum (Al), nickel (Ni), chromium (Cr), molybdenum (Mo), tungsten (W), gold (Au), or alloys thereof. etc. can be formed.

The interlayer insulating film 113 may be formed of an insulating material such as silicon oxide (SiOx) or silicon nitride (SiNx), and may also be formed of an insulating organic material. By selectively removing the interlayer insulating film 113 and the gate insulating film 112, a contact hole exposing the source and drain regions may be formed.

The source and drain electrodes (SE, DE) are formed on the interlayer insulating film 113 in a single-layer or multi-layer shape using an electrode material.

A planarization layer 114 may be located on the thin film transistor. The planarization layer 114 protects the thin film transistor and planarizes its top. The planarization layer 114 may be formed in various forms, and may be formed of an organic insulating film such as BCB (Benzocyclobutene) or acryl, or an inorganic insulating film such as silicon nitride (SiNx) or silicon oxide (SiOx). Various modifications are possible, such as being formed as a single layer or consisting of double or multiple layers.

An organic light emitting device (OLED) may have a first electrode (A), an organic light emitting layer (EL), and a second electrode (C) arranged sequentially. That is, the organic light emitting device (OLED) includes a first electrode (A) formed on the planarization layer 114, an organic light emitting layer (EL) located on the first electrode (A), and an organic light emitting layer (EL) located on the organic light emitting layer (EL). It may consist of two electrodes (C).

The first electrode (A) is electrically connected to the drain electrode (DE) of the driving thin film transistor through a contact hole. When the panel 110 is a top emission type, the first electrode A may be made of an opaque conductive material with high reflectivity. For example, the first electrode (A) may be formed of silver (Ag), aluminum (Al), gold (Au), molybdenum (Mo), tungsten (W), chromium (Cr), or an alloy thereof. .

The bank 115 is formed in the remaining area excluding the light emitting area. Accordingly, the bank 115 has a bank hole that exposes the first electrode A corresponding to the light emitting area. The bank 115 may be made of an inorganic insulating material such as silicon nitride (SiNx) or silicon oxide (SiOx), or an organic insulating material such as BCB, acrylic resin, or imide resin.

The organic light emitting layer (EL) is located on the first electrode (A) exposed by the bank 115. The organic light emitting layer (EL) may include a light emitting layer, an electron injection layer, an electron transport layer, a hole transport layer, and a hole injection layer. The organic light-emitting layer may be composed of a single light-emitting layer structure that emits a single light, or may be composed of a plurality of light-emitting layers that emit white light.

The second electrode (C) is located on the organic light emitting layer (EL). When the display panel 100 is a top emission type, the second electrode C is made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO). As a result, the light generated in the organic light emitting layer (EL) is emitted to the top of the second electrode (C).

A protective layer 116 and an encapsulation layer 117 are located on the second electrode C. The encapsulation layer 117 prevents oxygen and moisture from penetrating from the outside to prevent oxidation of the light emitting material and electrode material. When an organic light-emitting device is exposed to moisture or oxygen, pixel shrinkage, which reduces the light-emitting area, may occur, or dark spots may appear within the light-emitting area. The encapsulation layer (117) may be composed of an inorganic layer made of glass, metal, aluminum oxide (AlOx), or silicon (Si)-based material, or may have a structure in which organic and inorganic layers are alternately stacked. The inorganic film serves to block the penetration of moisture or oxygen, and the organic film serves to flatten the surface of the inorganic film. The reason for forming the encapsulation layer 117 as multiple thin film layers is to make the movement path of moisture or oxygen longer and more complicated than a single layer, making it difficult for moisture/oxygen to penetrate into the organic light emitting device.

Figure 3 is a diagram explaining the heat dissipation member 140 according to an embodiment of the present specification.

In general, organic light emitting elements of organic light emitting display devices have characteristics of being vulnerable to heat. In harsh environments where temperatures rise and fall rapidly, such as in vehicles, organic light emitting devices may be damaged. In particular, when the temperature of the organic light emitting display device rises due to heat generated from driving the organic light emitting display device and direct external sunlight, the organic light emitting device deteriorates and ultimately reduces the lifespan of the organic light emitting device.

The inventors of the present specification recognized the above-mentioned problems and applied the heat dissipation member 140 to the lower part of the back plate 120 to improve the lifespan of the organic light emitting element of the organic light emitting display device 100. The heat dissipation member 140 may be made of a material with high thermal conductivity, for example, metal. For example, the heat dissipation member 140 may include a metal with excellent thermal conductivity, such as aluminum or aluminum alloy. The heat dissipation member 140 can lower the temperature of the organic light emitting display device 100 by emitting heat generated when the organic light emitting device is driven to the outside.

As described above, the reliability of the organic light emitting display device 100 applied for vehicles has been improved through the application of the heat dissipating member 140. However, the inventors of the present specification have found that when mounting the heat dissipating member as follows, the organic light emitting display device 100 ) It was discovered that problems may occur with the shape of .

FIG. 4 is a diagram schematically showing an organic light emitting display device including a bending area.

The vehicle display device may be manufactured in a shape including a bending area as shown in FIG. 4 depending on the design of the vehicle interior. As described above, vehicle display devices may often be used in environments where temperature and humidity change rapidly. When the vehicle display device has a bent shape and a general heat dissipation member 140 is applied as shown in FIG. 3, the stress of the heat dissipation member 140 and the adhesive layer 160 in the bending area increases. At this time, when the temperature of the display device increases due to the operation of the organic light emitting display device and the external environment, the adhesive 160 between the heat dissipation member 140 and the back plate 120 is peeled in the bending area, ultimately causing the entire heat dissipation member 140 to be damaged. Separation problems may occur. Accordingly, the inventors of the present specification designed a heat dissipation member 140 with a new structure that can solve the problem of the heat dissipation member 140 being separated.

Figure 5 is a schematic plan view showing a heat dissipation member of an organic light emitting display device according to an embodiment of the present specification. Figures 6 and 7 are cross-sectional views taken along line II' of Figure 5.

In FIG. 5 , the remaining configurations except for the heat dissipation member 240 are substantially the same as those described in FIGS. 3 and 4 , so duplicate descriptions are omitted. However, unlike FIGS. 3 and 4, the organic light emitting display device 200 described below has a peeling prevention device formed on the first portion 241 of the heat dissipation member 240 corresponding to the bending area of the organic light emitting display device 200. Since it includes a structure, the following will focus on the differences.

The heat dissipation member 240 may have a first part 241 corresponding to a bending area (or curved area) of the plastic substrate, and a second part 242 excluding the first part 241. For example, the plastic substrate may include two or more flat areas and a bending area (or curved area) between the flat areas. Accordingly, the heat dissipation member 240 includes a first portion 241 corresponding to the curved area, and It may include a second portion 242 corresponding to the planar area. When the plastic substrate has a plurality of bending areas, the first portion 241 of the heat dissipation member 240 may also be formed in a plurality. The peeling prevention structure formed in the first portion 241 can prevent the adhesive layer 260 interposed between the heat dissipation member 240 and the back plate from falling off. The first portion 241 may include a plurality of trenches parallel to the bending axis. When looking at the cross section of the heat dissipation member 240 with reference to FIG. 6, the groove portion in the plurality of trenches of the first part 241 is the second part of the heat dissipation member 240 ( It may have a thickness smaller than the thickness of 242). The second portion 242 has a uniform thickness. Due to the trench shape of the first portion 241, stress due to bending may be reduced in the first portion 241 of the heat dissipation member 240 corresponding to the bending area. That is, the trench of the first part 241 can facilitate bending of the plastic substrate, and the bending stress is reduced to reduce the temperature of the organic light emitting display device 200 due to the operation of the organic light emitting display device 200 and the external environment. Even if the rises, the adhesive 260 between the heat dissipation member 240 and the back plate 220 does not peel off in the bending area, so as shown in FIG. 7, the heat dissipation member 240 is not separated from the upper back plate 220 and is bent. It can maintain its shape.

The first part 241 may further include filler provided to maintain the bending angle. The filler may be a polymer material (resin, etc.). The filler may include a thermal or light (UV) curing initiator. That is, the filler is applied between a plurality of trenches formed in the first part 241 of the heat dissipation member 240 and then cured through heat or light (UV) to enable the heat dissipation member 240 to maintain its bent shape. It plays a role. After the filler is filled, the first portion 241 of the heat dissipation member 240 has no irregularities and can have a flat surface. And the thickness of the first part 241 and the second part 242 becomes the same, so that the surface becomes uniform.

An organic light emitting display device according to an embodiment of the present invention can be described as follows.

An organic light emitting display device according to an embodiment of the present invention includes a plastic substrate including a flat area and a bending area and having an organic light emitting element and a thin film transistor. A back plate is included in the lower part of the plastic substrate, and a heat dissipation member is included in the lower part of the back plate. The heat dissipation member has a first part corresponding to the bending area and a second part excluding the first part, and the first part may include a plurality of trenches that facilitate bending of the bending area. The plastic substrate may have at least two bending areas. The second portion may have a uniform thickness. Therefore, heat generated in all areas of the organic light emitting display device can be dissipated evenly.

The first part may further include a filler provided to maintain the bending angle. For example, the filler may include a polymer material (resin, etc.) containing a heat or photocuring initiator. The thickness of the second portion of the first portion with the filler may be equal to the thickness of the second portion.

A cover window may be further included on the top of the plastic substrate. A functional layer including at least one of a polarizer, a phase retardation plate, a viewing angle control film, and a touch panel may be included between the plastic substrate and the cover window.

Although embodiments of the present specification have been described in detail with reference to the attached drawings, the present specification is not necessarily limited to these embodiments, and various modifications may be made without departing from the technical spirit thereof. Accordingly, the embodiments disclosed in this specification are not intended to limit the technical idea of the present invention, but rather to explain it, and the scope of the technical idea of the present invention is not limited by these embodiments. Each feature of the various embodiments of the present invention can be partially or entirely combined or combined with each other, and can be technically linked and driven in various ways by those skilled in the art, and each embodiment can be implemented independently of each other or together in a related relationship. It may be implemented. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

100, 200: Organic light emitting display device
110, 210: display panel
111: Base layer (plastic substrate)
112: Gate insulating film
113: Interlayer insulation film
114: planarization layer
115: bank
116: protective layer
117: Encapsulation layer
120, 220: backplate
130, 230: Cover window
140, 240: Heat dissipation member
150, 250: functional layer
241: Part 1
242: Part 2

Claims (17)

A plastic substrate including a flat area and a banded area;
a back plate disposed below the plastic substrate;
an adhesive layer disposed below the back plate; and
It includes a heat dissipation member disposed below the adhesive layer,
The heat dissipation member includes a first part corresponding to the bending area and a second part excluding the first part,
The first portion includes a plurality of trenches that facilitate bending of the bending region,
The plurality of trenches are arranged parallel to the bending axis of the bending area,
The adhesive layer is disposed to overlap the first portion and the second portion of the heat dissipation member. According to paragraph 1,
The organic light emitting display device wherein the plurality of trenches prevent peeling of the adhesive layer. According to paragraph 1,
The first part further includes a filler provided to maintain the bending angle,
The organic light emitting display device wherein the filler is disposed only in the plurality of trenches in the first portion of the heat dissipation member. According to paragraph 1,
The second portion has a uniform thickness. According to paragraph 4,
The organic light emitting display device wherein the thickness of the first portion is the same as the thickness of the second portion. According to paragraph 1,
An organic light emitting display device, wherein at least two bending areas are provided on the plastic substrate. According to paragraph 1,
An organic light emitting display device further comprising a cover window disposed on an upper portion of the plastic substrate. In clause 7,
An organic light emitting display device further comprising a functional layer disposed between the plastic substrate and the cover window. According to clause 8,
The functional layer includes at least one of a polarizer, a phase retardation plate, a viewing angle control film, and a touch panel. A plastic substrate including a plurality of flat areas and a curved area disposed between the flat areas;
a heat dissipation member disposed below the plastic substrate; and
On the heat dissipation member, it includes an adhesive layer disposed to overlap the flat area and the curved area,
The heat dissipation member includes a peeling prevention structure that prevents peeling of the adhesive layer in a portion corresponding to the curved area,
The peeling prevention structure includes a plurality of trenches,
An organic light emitting display device, wherein the plurality of trenches are arranged parallel to a bending axis of the curved area. According to clause 10,
An organic light emitting display device further comprising a back plate disposed between the plastic substrate and the heat dissipation member. According to clause 11,
The adhesive layer is disposed between the heat dissipation member and the back plate. According to clause 10,
The peeling prevention structure further includes a filler filling between the plurality of trenches,
An organic light emitting display device, wherein the filler is disposed only in the plurality of trenches. According to clause 13,
The filler maintains the shape of the curved area. According to clause 13,
An organic light emitting display device wherein the filler includes resin. According to clause 10,
An organic light emitting display device further comprising a cover window disposed on an upper portion of the plastic substrate. According to claim 16,
An organic light emitting display device comprising at least one of a polarizer, a phase retardation plate, a viewing angle control film, and a touch panel disposed between the plastic substrate and the cover window.