KR20190081879A - Display apparatus - Google Patents

Abstract

According to the present invention, a component forming mold for a display device includes: a base part; a shape determining part arranged to form a shape set on the base part; a cutout part which has an inner side in close contact with the outer side of the shape determining part to form a set blade shape, is disposed on the base part, and has an upper end protruding into the side part of the shape determining part; a fixing part disposed on the base to surround the outer circumference of the cutting part; and an inclined coupling part disposed between the cut part and the fixed part, supporting the outer surface of the cut part, and forming an inclined coupling with the cut part. It is possible to efficiently reduce machining dimension error and machining precision by pressing and supporting a lower end part gradually and stably.

Description

Display device {DISPLAY APPARATUS}

The present invention relates to a display device, and more particularly, to a display device capable of efficiently emitting heat.

BACKGROUND ART Organic light emitting diodes (OLEDs) are organic materials made by using a light emission phenomenon that emits light to the outside when a current flows through a fluorescent organic compound. The organic light emitting diode (OLED) Which is more than 1,000 times faster than that of the conventional display device.

OLEDs are classified into Passive Matrix (PM) and Active Matrix (AM) depending on the driving method. Currently, OLEDs are mainly used for displays of small-sized devices such as cellular phones and digital cameras. However, Since there is an advantage in that it is excellent and does not require a backlight unit, the use of the large-area display is gradually increasing.

However, the OLED has a fatal weak point in that when it comes into contact with moisture and air, deterioration of organic matter occurs during light emission, resulting in a short product life.

In addition, OLEDs generate less heat than other display devices, but generate heat due to self-luminescent phenomenon. When the overall temperature of the OLED increases due to the heat, there is a problem in that the life and quality of the OLED are affected.

Particularly, when manufacturing an OLED large-area display, it is more difficult to block the moisture and air introduced from the outside, and the amount of OLED devices used to maintain a high luminance increases, There is a problem. The above problem is a major cause of difficulty in enlarging the OLED display. Accordingly, the OLED display device effectively blocks the OLED device from moisture and air introduced from the outside, and encapsulates the self-heating amount of the OLED device to the outside, Is very urgent.

Accordingly, the present inventors have found that, in order to solve the above-described problems, the present invention has an excellent adhesive property to an OLED substrate and has no fear of breakage. Even when attached to a large-area OLED substrate, moisture and air can be prevented from entering from the inside or outside, It is required to develop a technique having a heat dissipation layer that is excellent in heat dissipation property.

FIG. 1 is a structural view showing the configuration of a conventional OLED display device.

Referring to FIG. 1, a conventional OLED display device has a substrate.

An anode electrode is disposed at an upper end of the substrate 10, and a light emitting layer 11 is disposed at an upper portion of the anode electrode.

A cathode electrode is disposed on the emission layer 11.

A hole injecting layer and a hole transporting layer are stacked and packed between the node electrode and the light emitting layer.

An electron transport layer and an electron injection layer are stacked between the light emitting layer 11 and the cathode electrode.

An encapsulation layer 20 is disposed at an upper end of the cathode electrode.

Here, the node electrode and the cathode electrode are electrically connected to each other.

According to this structure, in the state in which the anode electrode and the cathode electrode are electrically connected to each other, the holes are moved to the light emitting layer 11, and light is emitted through the electrons and the electrons injected into the light emitting layer 11 .

At this time, a predetermined heat is generated in the light emitting layer (11). And the heat is emitted from the light emitting layer 11 to the outside.

That is, in the OLED display device, the above-described light emission emits light by forming excitons in the light emitting layer (EML) by injecting holes (+) and electrons (-) injected from the anode electrode and the cathode electrode.

At this time, according to the efficiency of the device, energy other than light is emitted in the form of heat.

2 is a photograph showing an example in which a blackening phenomenon occurs in a conventional display area.

The heat generated as described above causes a reduction in the lifetime of the OLED element and causes a blackening phenomenon in the display region of the display as shown in Fig.

3 is a cross-sectional view showing a configuration of a conventional OLED display device.

Referring to FIG. 3, a conventional OLED display device has a substrate 10 which is a TFT glass. An OLED element 11 constituting a light emitting layer is disposed on the TFT glass substrate 10.

The OLED element 11 is surrounded by the passivation layer 12.

An adhesive layer 21 is disposed on the upper portion of the passivation layer 12 and a metal layer 22 is disposed on the upper portion of the adhesive layer. The adhesive layer 21 and the metal layer 22 form an encapsulation layer 20.

The metal layer 22 itself acts as a moisture barrier.

According to the above configuration, heat is conventionally transferred through the metal layer 22 for blocking moisture.

Referring to the above configuration, light is generated in the OLED element 11 as the OLED element 11 is driven, and a predetermined heat is generated in the OLED element 11 due to the generation of the light.

The heat is finally discharged to the outside through the passivation layer 12, the adhesive layer 21, and the metal layer 22.

Referring to the temperature profile of FIG. 3, the gradient of the temperature of the heat generated in the OLED element 11 and the temperature finally emitted to the outside through the metal layer 22 has a predetermined slope.

Herein, as the temperature difference is increased, the thermal efficiency is lowered.

That is, as the inclination of the temperature gradient becomes gentler, the heat radiation efficiency may be higher.

In addition, in order to solve the problem that heat other than the light generated in the OLED element 11 accelerates the lifetime of the device, a conventional heat dissipation layer 40 made of a metal such as aluminum is formed on the top of the metal layer 22 However, since the outermost layer is formed of a metal and the emissivity of the metal is low, the heat transferred to the metal layer is not efficiently discharged, but rather the heat generated in the OLED element 11 is blocked. Can not be efficiently discharged to the outside, and the deterioration of the device is accelerated.

A prior art related to the present invention is Korean Patent Laid-Open Publication No. 10-2011-0131381 (published on Dec. 07, 2011), which discloses an OLED device using an insulation and heat dissipation structure and a method of manufacturing the same Is disclosed.

It is an object of the present invention to provide a display device capable of efficiently emitting heat generated in a device to the outside.

It is another object of the present invention to provide a display device capable of simultaneously emitting heat generated in a device through both sides of the substrate.

In order to achieve the above-mentioned object, an embodiment according to the present invention includes: a substrate on which a heating element is disposed; A sealing layer disposed on the heating element to surround the heating element; And a heat dissipation part which is provided on the sealing layer and dissipates heat generated from the heat generating element.

The heat dissipation unit may include a carbon isotope consisting of carbon, and may be formed of graphene, carbon nanotube or diamond.

The heat dissipation unit may be doped in the sealing layer.

The sealing layer may include an adhesive layer surrounding the heating element, and a metal layer disposed on an upper portion of the adhesive layer.

Here, the heat dissipation unit may be included in the adhesive layer and / or the metal layer.

The adhesive layer may include a first adhesive layer surrounding the heating element, and a second adhesive layer disposed at an upper end of the first adhesive layer and including a getter therein.

The heat dissipation unit may be provided at the top of the sealing layer, inside the sealing layer, or at the bottom of the sealing layer.

A passivation layer may be provided between the heat generating element and the sealing layer.

The heat dissipation unit may be disposed between the lower end of the sealing layer and the passivation layer.

The heat dissipation unit may include a layer and / or a doped region.

A polarizing plate having a predetermined polarizing pattern and made of a heat dissipation material may be disposed on the lower end of the substrate.

An auxiliary heat-radiating layer may further be provided on an upper end of the polarizing plate.

INDUSTRIAL APPLICABILITY The present invention has the effect of efficiently discharging heat generated in a device to the outside.

Further, the present invention has an effect that heat generated in the device can be simultaneously discharged through both sides of the substrate.

FIG. 1 is a structural view showing the configuration of a conventional OLED display device.
2 is a photograph showing an example in which a blackening phenomenon occurs in a conventional display area.
3 is a cross-sectional view showing a configuration of a conventional OLED display device.
4 is a cross-sectional view showing a display device of the present invention.
5 is a cross-sectional view showing an example in which an auxiliary heat-radiating layer is further formed on the top of the metal layer according to the present invention.
6 is a cross-sectional view showing the arrangement of heat dissipation units applied to another example of the adhesive layer according to the present invention.
7 is a cross-sectional view showing another arrangement state of the heat dissipation unit applied to another example of the adhesive layer according to the present invention.
8 is a cross-sectional view showing an example in which a heat dissipating portion is formed inside the adhesive layer according to the present invention.
9 is a cross-sectional view showing an example in which the auxiliary heat-radiating layer according to the present invention is applied to the inside of the sealing layer.
10 is a cross-sectional view showing an example in which the auxiliary heat-radiating layer according to the present invention is applied to the outer surface of the sealing layer.
11 is a cross-sectional view showing an example in which the auxiliary heat-radiating layer according to the present invention is disposed so as to surround the passivation layer.
12 is a cross-sectional view showing a display device to which a polarizing plate having a heat radiation function according to the present invention is applied.
13 is a plan view showing the polarizer shown in Fig.
14 is a cross-sectional view showing an example of a polarizing plate and a display device having a heat-radiating portion according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings so that those skilled in the art can easily carry out the present invention.

The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

Hereinafter, the term "an upper (or lower)" or a "top (or lower)" of the substrate means that any structure is disposed or arranged in any manner, as long as any structure is provided or disposed in contact with the upper surface .

Furthermore, the present invention is not limited to a configuration that does not include any other configuration between the substrate and any configuration provided or disposed on (or under) the substrate.

Hereinafter, a display device of the present invention will be described with reference to the accompanying drawings.

4 is a cross-sectional view showing a display device of the present invention.

Referring to FIG. 4, the display device of the present invention is provided with a substrate 100. The substrate 100 may be a TFT glass substrate.

An OLED element 110 is disposed on an upper end of the substrate 100. As described above, the OLED element 110 generates light when driving and generates a predetermined heat. Hereinafter, it is referred to as a heat generating element 110.

A polarizer 120 may be disposed on the lower end of the substrate 100.

A passivation layer 400 may be disposed on the substrate 100 to surround the heat generating element 110.

An encapsulation layer 200 may be disposed on the passivation layer 400.

The sealing layer 200 may be composed of an adhesive layer 210 and a metal layer 220. The adhesive layer 210 may be a single layer and may be disposed on the passivation layer 400. The metal layer 220 may be disposed on the adhesive layer 210.

The heat dissipation unit 300 according to the present invention is provided inside the sealing layer 200 and may be doped into a predetermined doping concentration region of the adhesive layer 210.

Here, the doping concentration of the heat dissipation unit 300 may be set to be higher as it is relatively closer to the heating element 110 in the adhesive layer 210, and may be doped.

Referring to the above configuration, the heat generating element 110 generates light when driving and generates a predetermined heat.

The heat generated in this way can be transmitted to the outside through the sealing layer 200.

Since the heat dissipating unit 300 according to the present invention dissipates heat generated from the heat generating element 110 in the vicinity of the heat generating element 110, heat can be efficiently discharged to the outside.

Here, in the present invention, when the temperature of the heat generated when the heating element 110 is driven is t1 and the temperature of the metal layer 220 emitted to the outside through the metal layer 220 is t2, If it does not exist, it can be efficiently reduced.

That is, heat generated from the heat generating element 110 can be prevented from being absorbed by each layer, and the heat can be released to the outside.

The doping material of the heat dissipating unit 300 according to the present invention may be used as a material having a thermal conductivity of at least 2300 to 5300 W / mK.

That is, the heat dissipation unit 300 includes a carbon isotope composed of carbon, and may be formed of any one of carbon nanotubes, graphenes, and diamonds.

Meanwhile, the doping concentration of the heat dissipating unit 300 according to the present invention may be doped so as to have the same concentration in the adhesive layer 210 at the upper and lower portions with the center layer as a boundary.

The doping concentration may be doped so as to have a concentration higher than that of the outer region in the region corresponding to the shape of the outer periphery of the heat generating member 110 on the outer periphery of the heat generating element 110.

5 is a cross-sectional view showing an example in which an auxiliary heat-radiating layer is further formed on the top of the metal layer according to the present invention.

5, a thick auxiliary heat-dissipating layer 500 may be further formed on the metal layer 220 of the substrate 100, the passivation layer 400, and the sealing encapsulation layer 200 according to the present invention. The auxiliary heat dissipation layer 500 includes carbon isotopes of carbon, and may be formed of any one of carbon nanotubes, graphene, and diamond.

According to the above structure, the heat generated from the heat generating element 110 is prevented from being absorbed by the heat dissipating part 300 and the auxiliary heat dissipating layer 500, which are distributed in the sealing layer 200, The heat can be released to the outside.

Here, in the present invention, the metal layer 220 and the auxiliary heat-radiating layer 500 may be arranged so as to be in surface contact with each other, but may be configured to have concave-convex or curved contact with each other to increase the heat radiation area.

The auxiliary heat sink layer 500 according to the present invention may be disposed on the metal layer 220 or between the metal layer 220 and the adhesive layer 210.

When the auxiliary heat sink layer 500 is disposed between the metal layer 220 and the adhesive layer 210 as described above, the upper end of the auxiliary heat sink layer 500, the lower end of the metal layer 220, The lower end of the layer 500 and the upper end of the adhesive layer 220 may be concave or convex.

6 is a cross-sectional view showing the arrangement of heat dissipation units applied to another example of the adhesive layer according to the present invention.

6, the adhesive layer 210 according to the present invention includes a first adhesive layer 211 surrounding the heat generating element 110, a second adhesive layer 211 disposed on the upper side of the first adhesive layer 211, And a second adhesive layer 212 including a second adhesive layer.

Here, the first adhesive layer 211 may include an olefin material, and the second adhesive layer 212 may further include a getter in addition to the olefin material.

In this construction, the heat dissipating unit 300 according to the present invention may be doped in the second adhesive layer 212 to form a predetermined area.

Here, the heat dissipation unit 300 includes carbon isotopes of carbon, and may be formed of any one of carbon nanotubes, graphenes, and diamonds.

The heat generated from the heat generating element 110 is dissipated through the heat dissipating unit 300 doped in the second adhesive layer 212 of the adhesive layer 210 and discharged through the outside of the metal layer 220 .

Further, in addition to the above structure, the auxiliary heat-radiating layer 500 may be further provided on the upper portion of the metal layer 220.

Of course, the auxiliary heat sink layer 500 may be disposed between the second adhesive layer 212 and the metal layer 220.

According to this configuration, in the present invention, the heat generated from the heat generating element 110 can be dissipated in multiple ways to be discharged to the outside.

7 is a cross-sectional view showing another arrangement state of the heat dissipation unit applied to another example of the adhesive layer according to the present invention.

Referring to FIG. 7, the heat dissipating unit 300 according to the present invention may be doped in the first adhesive layer 211 made of an olefin material to form a predetermined region.

In this case, the doping concentration of the heat dissipating unit 300 may be higher than the doping concentration of the heat dissipating unit 300 in the vicinity of the light emitting device 110.

In this embodiment, as described above, the auxiliary heat dissipation layer 500 may be further provided on the upper side of the metal layer 220, which may be disposed between the metal layer 220 and the second adhesive layer 212 And may further be disposed between the first and second adhesive layers 211 and 212.

According to this configuration, in the present invention, the heat generated from the heat generating element 110 can be dissipated in multiple ways to be discharged to the outside.

The heat dissipation materials of the auxiliary heat dissipation layer 500 and the heat dissipation unit 300 may be made of materials having different thermal conductivities at the corresponding positions.

8 is a cross-sectional view showing an example in which a heat dissipating portion is formed inside the adhesive layer according to the present invention.

Referring to FIG. 8, the adhesive layer 210 according to the present invention may include the first and second adhesive layers 211 and 212 as described above.

The heat dissipating unit 300 according to the present invention may have a predetermined area by doping the first and second adhesive layers 211 and 212 therein.

In this case, the doping concentration of the doping material of the heat dissipating unit 300 may be relatively high in the first adhesive layer 211 than in the second adhesive layer 212. That is, there is an advantage that the doping concentration of the doping material is increased as it is located near the light emitting device 110, and the heat is quickly dissipated while the heat is transferred to the metal layer 220.

Further, in addition to the above structure, the auxiliary heat-radiating layer 500 may be further provided on the upper portion of the metal layer 220.

Of course, the auxiliary heat sink layer 500 may be disposed between the second adhesive layer 212 and the metal layer 220.

According to this configuration, in the present invention, the heat generated from the heat generating element 110 can be dissipated in multiple ways to be discharged to the outside.

FIG. 9 is a cross-sectional view showing an example in which the auxiliary heat-radiating layer according to the present invention is applied to the inside of the sealing layer, and FIG. 10 is a sectional view showing an example in which the auxiliary heat-radiating layer according to the present invention is applied to the outer surface of the sealing layer.

Referring to FIG. 9, the auxiliary heat-radiating layer 500 according to the present invention includes a layer, and may be disposed between the metal layer 220 and the adhesive layer 210 described above.

Here, the adhesive layer 210 according to the present invention may be composed of first and second adhesive layers 211 and 212, which are formed in a laminated structure.

At least one of the first and second adhesive layers 211 and 212 may include a carbon isotope consisting of carbon, and a heat dissipating unit formed of any one of graphene, carbon nanotube, or diamond may be doped.

10, the auxiliary heat-radiating layer 500 may be provided on the top of the metal layer 220. [

In this case, a heat radiation material having a predetermined concentration may be doped into the adhesive layer 210 to further form the heat radiation part 300.

11 is a cross-sectional view showing an example in which the auxiliary heat-radiating layer according to the present invention is disposed so as to surround the passivation layer.

11, the auxiliary heat-radiating layer 500 according to the present invention has a certain thickness around the outer periphery of the passivation layer 400 stacked on the substrate 100 so as to surround the periphery of the heat-generating element 110 .

Accordingly, the auxiliary heat-radiating layer 500 according to the present invention is configured to surround the periphery of the heat-generating element 110, so that it can emit much heat generated from the heat-generating element 110.

In addition, in addition to the above example, the heat dissipation unit 300 according to the present invention described above may be further doped in all or one of the first and second adhesive layers 211 and 212 according to the present invention.

Further, another auxiliary heat dissipation layer may be further provided between the upper end of the metal layer 220 or between the metal layer 220 and the second adhesive layer 212.

According to this configuration, by forming a plurality of heat dissipation structures, it is possible to more effectively reduce the temperature difference described with reference to FIG.

FIG. 12 is a cross-sectional view showing a display device to which a polarizing plate having a heat radiation function according to the present invention is applied, and FIG. 13 is a plan view showing a polarizing plate shown in FIG.

Referring to FIG. 12, a polarizing plate 600 is disposed under the substrate 100 according to the present invention.

The organic light emitting diode (OLED) display device according to the present invention may cause deterioration of display performance due to mutual interference between the light emitted from the self-luminous body and the external natural light (external light) reflected from the internal reflection plate entering from the outside.

To suppress this, the OLED display device includes a polarizing plate 600.

The OLED polarizer 600 is oriented such that the absorption axis of the polarizer and the optical axis (absorption axis) of the retardation compensation film are inclined. As a result, the waveform of the external light reflected by the internal reflection plate is rotated to have a function as an anti-reflection filter.

In the present invention, the polarizing plate 600 has a sloping pattern as shown in FIG. 13, and the material of the polarizing plate 600 includes a carbon isotope consisting of carbon, among which graphene or carbon nano A tube, a diamond, or a diamond.

In accordance with this configuration, the polarizing plate 600 of the present invention is configured such that the heat generated in the above-described heating element 110, including the above-mentioned function of the anti-reflection filter, In addition, the polarizing plate 600 according to the present invention may further include a carbon isotope consisting of carbon in the inside thereof, and a powder made of graphene, carbon nanotube or diamond among them.

The constituent density along the powder may be made denser in the lower portion of the heat generating element 110 and in the vicinity of the heat generating element 110 than in the other regions to further increase the heat radiation efficiency.

14 is a cross-sectional view showing an example of a polarizing plate and a display device having a heat-radiating portion according to the present invention.

Referring to FIG. 14, the polarizer 600 shown in FIG. 13 may be disposed on the lower end of the substrate 100 according to the present invention. The polarizing plate 600 has a function of heat dissipation.

In the second adhesive layer 212 of the sealing layer 200, a carbon isotope consisting of carbon may be doped, and a heat dissipation material composed of graphene, carbon nanotube, or diamond may be doped therein.

Accordingly, in the present invention, the upper and lower portions of the heat generating element 110 disposed on the substrate 100 can have a heat radiating function.

That is, the upper part of the heat generating element 110 radiates heat through the heat dissipating part 300, and the lower part includes a carbon isotope, and a polarizing plate 600 (for example, a carbon nanotube or diamond) The heat dissipation can be performed simultaneously.

Of course, the heat dissipating unit 300 according to the present invention may be doped to the second adhesive layer 212 or to both the first and second adhesive layers 211 and 212.

In the case where the auxiliary heat dissipation layer 500 including carbon isotope composed of carbon and having graphene or carbon nanotubes or diamond is further provided, the upper part of the metal layer 220 or the metal layer 220, 2 adhesive layer 212 or between the first and second adhesive layers 211 and 212 or around the outer periphery of the passivation layer 400. [

For example, the comparative example is a case in which a separate heat radiating portion is not provided on the upper part of the sealing layer, Example 1 is an example in which the auxiliary heat radiating layer according to the present invention is provided on the upper side of the metal layer, And the heat dissipation portion is doped in the adhesive layer.

Comparative Example 1 Example 1 Example 2 Temperature (Celsius) 92.7 87.4 67.0

As can be seen from Table 1, in Example 1 according to the present invention, the temperature of heat generated from the corresponding heating element is 87.4 degrees Celsius when driving the light emitting device, and 67 degrees Celsius in Embodiment 2, It is 97.2 degrees Celsius.

That is, as in the present invention, when the heat dissipating part is formed of graphene, carbon nanotube or diamond and doping the inside of the adhesive layer, heat generated from the heat generating element is dissipated more efficiently, It is possible to prevent deterioration and prolong the service life.

According to the above structure and operation, the embodiments according to the present invention have an advantage that heat generated in the device can be efficiently discharged to the outside.

In addition, embodiments according to the present invention also have the advantage that heat generated in the device can be simultaneously emitted through both sides of the substrate.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

It is to be understood that the foregoing embodiments are illustrative and not restrictive in all respects and that the scope of the present invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

100: substrate
200: sealing layer
210: adhesive layer
211: first adhesive layer
212: second adhesive layer
220: metal layer
300:
400: passivation layer
500: auxiliary heat-radiating layer
600: polarizer

Claims (10)

A substrate on which a heating element is disposed;
A sealing layer disposed on the heating element to surround the heating element; And
A heat dissipation unit which is provided in the sealing layer and dissipates heat generated from the heating element;
/ RTI >
Display device.
The method according to claim 1,
The heat-
Graphene, or carbon nanotube or diamond,
Display device.
The method according to claim 1,
The heat-
Inside the encapsulating layer,
Doped,
Display device.
The method according to claim 1,
The encapsulation layer may be formed,
An adhesive layer surrounding the heating element,
And a metal layer disposed on the top of the adhesive layer,
The heat-
The adhesive layer and / or the metal layer,
Display device.
The method according to claim 1,
The pressure-
A first adhesive layer surrounding the heat generating element,
And a second adhesive layer disposed on an upper end of the first adhesive layer and including a getter therein,
Display device.
The method according to claim 1,
The heat-
The upper end of the sealing layer, the inside of the sealing layer, or the lower end of the sealing layer,
Display device.
The method according to claim 6,
Between the heating element and the sealing layer,
A passivation layer is provided,
The heat-
A lower end of the sealing layer, and a passivation layer disposed between the passivation layer,
Display device.
The method according to claim 6,
The heat-
Layer and / or a doped region,
Display device.
The method according to claim 1,
At the lower end of the substrate,
Wherein a polarizing plate having a set polarizing pattern and made of a heat dissipating material is disposed,
Display device.
The method according to claim 1,
At the upper end of the polarizing plate,
An auxiliary heat-radiating layer is further provided,
Display device.

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