KR102578543B1 - Cover window and Display device including the same - Google Patents

Abstract

The present invention includes a base on which a display area and a non-display area surrounding the display area are defined, a first groove located on one side of the base, corresponding to the non-display area, and surrounding the display area, and the first groove. A cover window including a light-shielding pattern including a second groove surrounding the is provided.
In a display device including such a cover window, the adhesion between the cover window and the display panel increases, thereby improving the durability of the display device.

Description

Cover window and display device including the same}

The present invention relates to a display device, and particularly to a cover window in which an adhesive layer can have a desired area, and a display device including the same.

In keeping with the information age, the display field has also developed rapidly, and in response to this, a liquid crystal display device (FPD) has been developed as a flat panel display device (FPD) with the advantages of thinner, lighter, and lower power consumption. Light emitting diode display devices have been developed and are widely applied.

Among these flat panel displays, a liquid crystal display device (LCD) displays images by optical anisotropy and polarization of liquid crystals.

This liquid crystal display device consists of a liquid crystal panel formed by forming a liquid crystal layer between two opposing substrates and bonding them together as an essential component, and a backlight unit is located at the bottom of the liquid crystal panel. The electric field within the liquid crystal panel changes the arrangement direction of the liquid crystal molecules, creating images through differences in transmittance for light from the backlight unit.

Meanwhile, a light-emitting diode display device uses a light-emitting diode panel containing light-emitting diodes as an essential component, and displays images by emitting light when holes and electrons from the anode and cathode combine in the light-emitting layer.

In such a display device, a cover window is attached to the display surface to protect the display panel (liquid crystal panel or light emitting diode panel).

1 is a schematic diagram of a conventional display device.

As shown in FIG. 1, the display device 1 includes a display panel 10, a cover window 20 located on the front side of the display panel 10, that is, on the display surface side, and the cover. It includes an adhesive layer 40 that attaches the window 20 and the display panel 10.

A light shielding pattern 30 is located on the cover window 20 to prevent light leakage from the edge of the display device 1.

The cover window 20 must be firmly attached to the display panel 10 through the adhesive layer 40. The adhesive is applied to the cover window 20 and then temporarily cured. Thereafter, the display panel 10 and the cover window 20 are adhered and placed to face each other and cured again, so that the display panel 10 and the cover window 20 are attached by the adhesive layer 40.

However, in the conventional display device 1, a problem occurs in which the adhesion between the cover window 20 and the display panel 10 is reduced or the adhesive layer 40 is exposed to the outside of the cover window 20, and accordingly, the display device 1 ), a problem of reduced durability occurs.

The present invention seeks to solve the problem of the durability of the display device being reduced due to a decrease in adhesion between the cover window and the display panel or the adhesive layer being exposed to the outside of the cover window.

For this purpose, the present invention includes a base on which a display area and a non-display area surrounding the display area are defined, a first groove located on one side of the base, corresponding to the non-display area, and surrounding the display area, and A cover window including a light-shielding pattern including a second groove surrounding a first groove is provided.

The present invention provides a display device including the above-described cover window, a display panel positioned corresponding to the one side of the cover window, and an adhesive layer positioned between the display panel and the cover window.

In the present invention, the area of the adhesive layer formed on the cover window can be controlled by forming a first groove surrounding the display area and a second groove surrounding the first groove in the light-shielding pattern formed on the cover window.

That is, when the adhesive applied to the inside of the first groove spreads to the edge of the cover window, the first groove acts as a flow buffer pattern of the adhesive to reduce the spreading force of the adhesive, and the second groove acts as a flow blocking pattern of the adhesive. This prevents the adhesive from exceeding the second groove. Accordingly, the area of the adhesive layer is controlled so that the adhesive layer is formed in an area that does not exceed the outer end of the second groove.

Accordingly, in the display device including the cover window, the adhesive layer has a desired area, thereby improving adhesion between the cover window and the display panel, and damage to the adhesive layer is prevented because the adhesive layer is not exposed outside the cover window.

Additionally, the first and second grooves increase the adhesive area between the adhesive layer and the light-shielding pattern formed on the cover window, further improving the adhesion between the cover window and the display panel.

Accordingly, durability can be provided to the display device.

1 is a schematic diagram of a conventional display device.
Figure 2 is a schematic diagram to explain a defective adhesive layer in a cover window.
Figure 3 is a schematic cross-sectional view of a display device according to a first embodiment of the present invention.
Figure 4 is a schematic cross-sectional view of the liquid crystal panel.
Figure 5 is a schematic cross-sectional view of a light emitting diode panel.
Figure 6 is a schematic plan view of a cover window of a display device according to the first embodiment of the present invention.
Figure 7 is a schematic cross-sectional view of a display device according to a second embodiment of the present invention.
Figure 8 is a schematic plan view of a cover window of a display device according to a third embodiment of the present invention.
Figure 9 is a schematic plan view of a cover window of a display device according to a fourth embodiment of the present invention.
Figure 10 is a schematic plan view of a cover window of a display device according to a fifth embodiment of the present invention.
Figure 11 is a schematic plan view of a cover window of a display device according to a sixth embodiment of the present invention.
Figure 12 is a schematic plan view of a cover window of a display device according to a seventh embodiment of the present invention.

The adhesive for forming the adhesive layer must be applied to a certain area of the cover window and spread toward the edge to have the desired area.

However, referring to FIG. 2 for explaining a defect in the adhesive layer in the cover window, the adhesive may spread too widely and the adhesive layer 40 may be exposed to the outside of the cover window 20.

Additionally, because the adhesive layer 40 is formed to have an area smaller than a desired area, the adhesive strength between the cover window 20 and the display panel 10 may be reduced.

That is, because the area of the adhesive layer 40 is not controlled, problems arise such as the adhesion between the cover window 20 and the display panel 10 being reduced or the adhesive layer 40 being exposed to the outside of the cover window 20 .

The present invention aims to solve the problem of the adhesion between the cover window 20 and the display panel 10 being reduced or the adhesive layer 40 being exposed to the outside of the cover window 20 by controlling the area of the adhesive layer.

To solve this problem, the present invention includes a base on which a display area and a non-display area surrounding the display area are defined, a base located on one side of the base, corresponding to the non-display area, and surrounding the display area. A cover window including a light-shielding pattern including a first groove and a second groove surrounding the first groove is provided.

In the cover window of the present invention, the first groove has a smaller volume than the second groove.

In the cover window of the present invention, the first groove has a smaller width than the second groove.

In the cover window of the present invention, the first groove has a smaller depth than the second groove.

In the cover window of the present invention, the light blocking pattern further includes a third groove located between the first groove and the second groove.

In the cover window of the present invention, the third groove is parallel to the first and second grooves.

In the cover window of the present invention, the light blocking pattern further includes a fourth groove connecting the first groove and the third groove.

In the cover window of the present invention, the third groove is connected to the first groove.

In the cover window of the present invention, the depth of each of the first and second grooves is smaller than the thickness of the light-shielding pattern.

From another perspective, the present invention provides a display device including the above-described cover window, a display panel positioned corresponding to the one side of the cover window, and an adhesive layer positioned between the display panel and the cover window. .

In the display device of the present invention, the end of the adhesive layer is located between the first and second grooves.

In the display device of the present invention, the adhesive layer covers the first and second grooves.

Figure 3 is a schematic cross-sectional view of a display device according to a first embodiment of the present invention.

As shown in FIG. 3, the display device 100 includes a display panel 101 in which a display area (DA) and a non-display area (NDA) are defined, and a front surface of the display panel 101, that is, A cover window 130 located on the display surface side and including a base 110 and a light-shielding pattern 120 located on one side of the base 110 and having first grooves 122 and second grooves 124. and an adhesive layer 140 that attaches the cover window 130 and the display panel 101.

The light blocking pattern 120 faces the display panel 101 and is in contact with the adhesive layer 140.

The display panel 101 may be a liquid crystal panel or a light emitting diode panel that displays an image. Although not shown, the display device 100 may further include a case covering the back and side surfaces of the display panel 101. Additionally, the display device 100 may further include a touch panel located between the display panel 101 and the cover window 130.

Referring to FIG. 4 , which is a schematic cross-sectional view of the liquid crystal panel, the display panel 101 has first and second substrates 210 and 250 facing each other, and between the first and second substrates 210 and 250. It is interposed and includes a liquid crystal layer 260 containing liquid crystal molecules 262.

Each of the first and second substrates 210 and 250 may be a glass substrate or a flexible plastic substrate.

A first buffer layer 220 is formed on the first substrate 210, and a thin film transistor (Tr) is formed on the first buffer layer 220. The first buffer layer 220 may be omitted.

A gate electrode 222 is formed on the first buffer layer 220, and a gate insulating film 224 is formed covering the gate electrode 222. Additionally, a gate wire (not shown) connected to the gate electrode 222 is formed on the buffer layer 220.

A semiconductor layer 226 is formed on the gate insulating film 224 to correspond to the gate electrode 222. The semiconductor layer 226 may be made of an oxide semiconductor material. Meanwhile, the semiconductor layer 226 may include an active layer made of amorphous silicon and an ohmic contact layer made of impurity amorphous silicon.

A source electrode 230 and a drain electrode 232 are formed on the semiconductor layer 226 and are spaced apart from each other. Additionally, a data wire (not shown) connected to the source electrode 230 is formed to intersect the gate wire to define a pixel area.

The gate electrode 222, the semiconductor layer 226, the source electrode 230, and the drain electrode 232 constitute a thin film transistor (Tr).

A protective layer 234 having a drain contact hole 236 exposing the drain electrode 232 is formed on the thin film transistor Tr.

On the protective layer 234, a pixel electrode 240 is connected to the drain electrode 232 through the drain contact hole 236, and a common electrode 242 is alternately arranged with the pixel electrode 240. is formed

A second buffer layer 252 is formed on the second substrate 250, and a black matrix 254 that covers non-display areas such as the thin film transistor (Tr), the gate wire, and the data wire is formed on the second buffer layer 252. ) is formed. Additionally, a color filter layer 256 is formed corresponding to the pixel area. The second buffer layer 252 and the black matrix 254 may be omitted.

The first and second substrates 210 and 250 are bonded with a liquid crystal layer 260 therebetween, and the liquid crystal layer 260 is formed by an electric field generated between the pixel electrode 240 and the common electrode 242. ) liquid crystal molecules are driven. Meanwhile, the common electrode 242 may be formed on the second substrate 250.

Although not shown, an alignment film may be formed on the top of each of the first and second substrates 210 and 250 in contact with the liquid crystal layer 260, and on the outside of each of the first and second substrates 210 and 250. A polarizing plate having transmission axes perpendicular to each other may be attached.

Additionally, a backlight unit is disposed below the first substrate 210 to supply light to the display panel 101.

For example, the backlight unit includes a light guide plate located below the display panel 101, a light source located on at least one side of the light guide plate, a reflector located on the back of the light guide plate, and the light guide plate and the display panel 101. ) may include an optical sheet located between them.

Meanwhile, referring to FIG. 5 , which is a schematic cross-sectional view of the light emitting diode panel, the display panel 101 includes a substrate 310, a thin film transistor (Tr) located on the substrate 310, and an upper portion of the substrate 310. It is located in and includes a light emitting diode (D) connected to the thin film transistor (Tr).

The substrate 310 may be a glass substrate or a flexible plastic substrate.

A buffer layer 320 is formed on the substrate 310, and a thin film transistor (Tr) is formed on the buffer layer 320. The buffer layer 320 may be omitted.

A semiconductor layer 322 is formed on the buffer layer 320. The semiconductor layer 322 may be made of an oxide semiconductor material or polycrystalline silicon.

When the semiconductor layer 322 is made of an oxide semiconductor material, a light blocking pattern (not shown) may be formed under the semiconductor layer 322, and the light blocking pattern prevents light from entering the semiconductor layer 322. This prevents the semiconductor layer 322 from being deteriorated by light. Alternatively, the semiconductor layer 322 may be made of polycrystalline silicon, and in this case, both edges of the semiconductor layer 322 may be doped with impurities.

A gate insulating film 324 made of an insulating material is formed on the semiconductor layer 322. The gate insulating film 324 may be made of an inorganic insulating material such as silicon oxide or silicon nitride.

A gate electrode 330 made of a conductive material such as metal is formed on the gate insulating film 324 corresponding to the center of the semiconductor layer 322.

In FIG. 5 , the gate insulating film 324 is formed on the entire surface of the substrate 310, but the gate insulating film 324 may be patterned to have the same shape as the gate electrode 330.

An interlayer insulating film 332 made of an insulating material is formed on the gate electrode 330. The interlayer insulating film 332 may be formed of an inorganic insulating material such as silicon oxide or silicon nitride, or an organic insulating material such as benzocyclobutene or photo-acryl.

The interlayer insulating film 332 has first and second contact holes 334 and 336 exposing both sides of the semiconductor layer 322. The first and second contact holes 334 and 336 are located on both sides of the gate electrode 330 and are spaced apart from the gate electrode 330 .

Here, the first and second contact holes 334 and 336 are also formed within the gate insulating film 324. Alternatively, when the gate insulating film 324 is patterned to have the same shape as the gate electrode 330, the first and second contact holes 334 and 336 may be formed only within the interlayer insulating film 332.

A source electrode 340 and a drain electrode 342 made of a conductive material such as metal are formed on the interlayer insulating film 332.

The source electrode 340 and the drain electrode 342 are positioned spaced apart from each other around the gate electrode 330, and are provided on both sides of the semiconductor layer 322 through the first and second contact holes 334 and 336, respectively. come into contact with

The semiconductor layer 322, the gate electrode 330, the source electrode 340, and the drain electrode 342 form the thin film transistor (Tr), and the thin film transistor (Tr) is a driving element. ) functions as

The thin film transistor (Tr) has a coplanar structure in which the gate electrode 330, the source electrode 342, and the drain electrode 344 are located on the semiconductor layer 320.

In contrast, the thin film transistor (Tr) may have an inverted staggered structure in which the gate electrode is located at the bottom of the semiconductor layer and the source electrode and drain electrode are located at the top of the semiconductor layer. In this case, the semiconductor layer may be made of amorphous silicon.

Although not shown, gate wires and data wires intersect each other to define a pixel area, and a switching element connected to the gate wire and data wire is further formed. The switching element is connected to a thin film transistor (Tr), which is a driving element.

In addition, a power wire is formed parallel to and spaced apart from the data wire or the data wire, and a storage capacitor is further provided to maintain the voltage of the gate electrode of the thin film transistor (Tr), which is a driving element, constant during one frame. It can be configured.

A protective layer 350 having a drain contact hole 352 exposing the drain electrode 342 of the thin film transistor (Tr) is formed to cover the thin film transistor (Tr).

On the protective layer 350, a first electrode 360 connected to the drain electrode 342 of the thin film transistor (Tr) through the drain contact hole 352 is formed separately for each pixel area. The first electrode 360 may be an anode and may be made of a conductive material with a relatively high work function value. For example, the first electrode 360 may be made of a transparent conductive material such as indium-tin-oxide (ITO) or indium-zinc-oxide (IZO). .

A reflective electrode or a reflective layer may be formed on or below the first electrode 360 to increase light efficiency. For example, the reflective electrode or the reflective layer may be made of aluminum-palladium-copper (APC) alloy. The first electrode 360 may have a triple layer structure of ITO/APC/ITO.

Additionally, a bank layer 366 is formed on the protective layer 350 to cover the edge of the first electrode 360. The bank layer 366 exposes the center of the first electrode 360 corresponding to the pixel area.

A light emitting layer 362 is formed on the first electrode 360. The light-emitting layer 362 may have a single-layer structure of an emitting material layer made of a light-emitting material. In addition, in order to increase luminous efficiency, the light-emitting layer 362 includes a hole injection layer, a hole transport layer, a light-emitting material layer, and an electron transport layer ( It may have a multi-layer structure of an electron transporting layer and an electron injection layer.

The light-emitting material layer may include an inorganic light-emitting material such as quantum dots, or an organic light-emitting material.

A second electrode 364 is formed on the plastic substrate 310 on which the light emitting layer 362 is formed. The second electrode 364 is located in front of the display area and is made of a conductive material with a relatively low work function value and can be used as a cathode. For example, the second electrode 364 may be made of any one of aluminum (Al), magnesium (Mg), and aluminum-magnesium alloy (AlMg).

The first electrode 360, the light emitting layer 362, and the second electrode 364 form a light emitting diode (D).

Although not shown, an encapsulation film may be formed on the second electrode 364 to prevent external moisture from penetrating into the light emitting diode (D). The encapsulation film may have a stacked structure of a first inorganic insulating layer, an organic insulating layer, and a second inorganic insulating layer, but is not limited to this. Additionally, a polarizing plate (not shown) may be attached on the encapsulation film to reduce external light reflection. For example, the polarizer may be a circular polarizer.

Referring again to FIG. 3, the cover window 130 includes a base 110 on which a light blocking pattern 120 is formed, and is located on the display surface side of the display panel 101 to protect the display panel 101. do. The cover window 130 corresponds to the display area (DA) and the non-display area (NDA) of the display panel 101, and the light blocking pattern 120 corresponds to the non-display area (NDA).

For example, the base 110 of the cover window 130 may be made of tempered glass or high-hardness plastic.

The light blocking pattern 120 is formed on one side of the base 110 and corresponds to the non-display area (NDA) of the display panel 101 to prevent light leakage from the edge of the display panel 101.

For example, a color-changing material (not shown) may be included in the area of the light-shielding pattern 120 and the color-changing material may change color to form the light-shielding pattern 120 . In this case, as shown in FIG. 3, the light blocking pattern 120 may form a flat surface with the base 110.

Alternatively, the base 110 may have a flat surface and the light blocking pattern 120 may be formed on one side of the base 110. In this case, the light blocking pattern 120 may include black particles (not shown) such as titanium black or carbon black.

In the light blocking pattern 120, first and second grooves 122 and 124 are formed, which are spaced apart from each other and each surround the display area DA.

Referring to FIG. 3 and FIG. 6 which is a schematic plan view of the cover window of the display device according to the first embodiment of the present invention, the light blocking pattern 120 has a first groove 122 surrounding the display area DA. ) and a second groove 124 surrounding the first groove 122 are formed. That is, the second groove 124 is located between the first groove 122 and the end of the base 110 (or the end of the light-shielding pattern 120), and the first groove 122 is located between the first groove 122 and the end of the base 110. It is located between the groove 124 and the display area (DA).

In other words, the cover window 130 includes first and second grooves 122 and 124 each having a closed curve shape, and the first groove 122 is the second groove 124. It is located on the medial side.

The first groove 122 has a first width w1, and the second groove 124 has a second width w2 that is larger than the first width w1. The second groove (w2) may be about 2 to 4 times larger than the first groove (w1). Additionally, the first and second grooves 122 and 124 have substantially the same depth. That is, the first groove 122 has a smaller volume than the second groove 124.

The depth of the first and second grooves 122 and 124 is smaller than the thickness of the light blocking pattern 120. The first and second grooves 122 and 124 are formed to a depth within a range where light leakage can be prevented by the light blocking pattern 120.

The adhesive layer 140 is located between the cover window 130 and the display panel 101 and covers a portion of the light blocking pattern 120. The adhesive layer 140 may be made of optical clear resin (OCR) or optical elastic resin.

The adhesive layer 140 covers the first and second grooves 122 and 124. That is, the first and second grooves 122 and 124 are filled with the adhesive layer 140. In the present invention, since the first and second grooves 122 and 124 are formed in the light blocking pattern 120, the surface area of the light blocking pattern 120 increases. Accordingly, the adhesive force (adhesion) between the adhesive layer 140 and the cover window 130 increases.

Additionally, the area of the adhesive layer 140 is adjusted by the first and second grooves 122 and 124.

That is, after the liquid adhesive is applied to a certain area of the cover window 130, the area of the adhesive layer 140 is determined as the liquid adhesive spreads toward the edge of the cover window 130.

However, when the adhesive is applied shifted to one side, the adhesive layer 140 is formed asymmetrically in the cover window 130. For example, when the adhesive is applied by shifting to the left from the center of the cover window 130, the adhesive layer 140 is spaced a first distance from the left end of the cover window 130 and is positioned at the right end of the cover window 130. It is formed to be spaced apart from the second distance by a second distance greater than the first distance.

Additionally, if the amount of adhesive is too large, the adhesive layer 130 cannot be formed to a desired area.

However, in the present invention, the above problem is prevented by the first and second grooves 122 and 124.

For example, when the adhesive is shifted to one side and applied, the liquid adhesive spreads uniformly along the circumference of the display area DA through the first groove 122. Therefore, in the present invention, the adhesive layer 140 is formed symmetrically in the cover window 130.

In addition, when the amount of adhesive is too large, the spreading speed of the adhesive is controlled by the first groove 122 and when the adhesive reaches the second groove 124, it is larger than the width w1 of the first groove 122. The flow of adhesive is stopped by the second groove 124 having a large width w2. That is, the first groove 122 acts as a buffer pattern for the flow of the liquid adhesive, and the second groove 124 acts as a blocking pattern for the flow of the liquid adhesive.

Accordingly, the end of the adhesive layer 140 is located between the inner line of the first groove 122 and the outer line of the second groove 124. In other words, the first groove 122 is formed to correspond to the minimum extent of the desired area of the adhesive layer 140, and the second groove 124 is formed to correspond to the maximum extent of the desired area of the adhesive layer 140, so that the adhesive layer The end of 140 is located between the first and second grooves 122 and 124 and can be formed to have a desired area.

Additionally, the adhesive layer 140 can be positioned symmetrically within the cover window 130 by the first groove 122.

Therefore, in the display device 100 including the cover window 130 of the present invention, the adhesive layer 140 has a desired area due to the first and second grooves 122 and 124, so that the cover window 130 and the display Adhesion between the panels 101 is improved and damage to the adhesive layer 140 is prevented.

Additionally, the adhesive area between the adhesive layer 140 and the cover window 130 increases due to the first and second grooves 122 and 124, thereby further improving the adhesive force between the cover window 130 and the display panel 101.

Accordingly, the present invention can provide a durable display device 100.

Figure 7 is a schematic cross-sectional view of a display device according to a second embodiment of the present invention.

As shown in FIG. 7, the display device 400 includes a display panel 401 in which a display area (DA) and a non-display area (NDA) are defined, and a front surface of the display panel 401, that is, A cover window 430 located on the display surface side and including a base 410 and a light-shielding pattern 420 located on one side of the base 410 and having first grooves 422 and second grooves 424. and an adhesive layer 440 that attaches the cover window 430 and the display panel 401.

The light blocking pattern 420 faces the display panel 401 and is in contact with the adhesive layer 440.

The display panel 401 may be a liquid crystal panel or a light emitting diode panel that displays an image.

When the display panel 401 is a liquid crystal panel, as shown in FIG. 4, the first and second substrates 210 and 250 face each other and between the first and second substrates 210 and 250. It may include a liquid crystal layer 260 interposed and including liquid crystal molecules 262, a pixel electrode 240, and a common electrode 242.

Meanwhile, when the display panel 401 is a light-emitting diode panel, as shown in FIG. 5, a light-emitting diode (D) located on the substrate 310 is connected to the light-emitting diode (D) and the substrate 310 ) and a thin film transistor (Tr) located between the light emitting diode (D).

The cover window 430 includes a base 410 on which a light blocking pattern 420 is formed, and is located on the display surface side of the display panel 401 to protect the display panel 401. The cover window 430 corresponds to the display area (DA) and the non-display area (NDA) of the display panel 401, and the light blocking pattern 420 corresponds to the non-display area (NDA).

For example, the base 410 of the cover window 430 may be made of tempered glass or high-hardness plastic.

The light blocking pattern 420 is formed on one side of the base 410 and corresponds to the non-display area (NDA) of the display panel 401 to prevent light leakage from the edge of the display panel 401.

For example, the light blocking pattern 420 may include black particles (not shown) such as titanium black or carbon black.

In the light blocking pattern 420, first and second grooves 422 and 424 are formed, which are spaced apart from each other and each surround the display area DA. The first groove 422 surrounds the display area DA, and the second groove 424 surrounds the first groove 122. That is, the second groove 424 is located between the first groove 422 and the end of the base 410 (or the end of the light-shielding pattern 420), and the first groove 422 is located between the first groove 422 and the end of the base 410. It is located between the groove 424 and the display area (DA).

In other words, the cover window 430 includes first and second grooves 422 and 424, each of which has a closed curve (or simple closed curve) shape, and the first groove 422 ) is located inside the second groove 424.

The first groove 422 has a first depth d1, and the second groove 424 has a second depth d2 that is greater than the first depth d1. Additionally, the first and second grooves 422 and 424 have substantially the same width. That is, the first groove 422 has a smaller volume than the second groove 424.

The depth of the first and second grooves 422 and 424 is smaller than the thickness of the light blocking pattern 420. The first and second grooves 422 and 424 are formed to a depth within a range where light leakage can be prevented by the light blocking pattern 120.

The adhesive layer 440 is located between the cover window 430 and the display panel 401 and covers a portion of the light blocking pattern 420. The adhesive layer 440 may be made of optically transparent resin or optically elastic resin.

The adhesive layer 440 covers the first groove 422 and its end is located between the first and second grooves 422 and 424. Alternatively, the adhesive layer 440 may cover both the first and second grooves 422 and 424.

In the present invention, since the first and second grooves 422 and 424 are formed in the light blocking pattern 420, the surface area of the light blocking pattern 420 increases. Accordingly, the adhesive force (adhesion) between the adhesive layer 440 and the cover window 430 increases.

Additionally, the area of the adhesive layer 440 is adjusted by the first and second grooves 422 and 424. That is, the first groove 422 acts as a buffer pattern for the flow of the liquid adhesive, and the second groove 424 acts as a blocking pattern for the flow of the liquid adhesive.

Accordingly, the end of the adhesive layer 440 is located between the inner line of the first groove 422 and the outer line of the second groove 424. In other words, the first groove 422 is formed to correspond to the minimum extent of the desired area of the adhesive layer 440, and the second groove 424 is formed to correspond to the maximum extent of the desired area of the adhesive layer 440, so that the adhesive layer The end of 440 is located between the first and second grooves 422 and 424 and can be formed to have a desired area.

Therefore, in the display device 400 including the cover window 430 of the present invention, the adhesive layer 440 has a desired area due to the first and second grooves 422 and 424, so that the cover window 430 and the display Adhesion between the panels 401 is improved and damage to the adhesive layer 440 is prevented. Additionally, the adhesive area between the adhesive layer 140 and the cover window 430 increases due to the first and second grooves 422 and 424, thereby further improving the adhesive force between the cover window 430 and the display panel 401.

Accordingly, the present invention can provide a durable display device 400.

Figure 8 is a schematic plan view of a cover window of a display device according to a third embodiment of the present invention.

As shown in FIG. 8, in the cover window 530 of the display device according to the third embodiment of the present invention, the light blocking patterns 520 corresponding to the non-display area around the display area DA are spaced apart from each other. First and second grooves 522 and 524 surrounding the display area DA and a third groove 526 located between the first and second grooves 522 and 524 are formed.

The first groove 522 surrounds the display area DA, the third groove 522 surrounds the first groove 522, and the second groove 524 surrounds the fourth groove 526. ) surrounds it. That is, the second groove 524 is located between the first groove 522 and the end of the base (110 in FIG. 3) (or the end of the light blocking pattern 520), and the first groove 522 is It is located between the second groove 524 and the display area DA, and the third groove 526 is located between the first and second grooves 522 and 524.

In other words, the cover window 430 includes first to third grooves 522, 524, and 526 each having a closed curve shape, and the third groove 522 is the second groove ( It is located inside the 524) and outside the first groove 422.

The first groove 522 has a first width (w1 in FIG. 3), and the second groove 524 has a second width (w2 in FIG. 3) larger than the first width (w1). and the third groove 526 has a third width equal to or greater than the first width w1 of the first groove 522 and smaller than the second width w2 of the second groove 524. You can. At this time, the first to third grooves 522, 524, and 526 have substantially the same depth.

In contrast, the first groove 522 has a first depth (d1 in FIG. 3), and the second groove 524 has a second depth (d2 in FIG. 3) greater than the first depth (d1). and the third groove 526 has a third depth equal to or greater than the first depth d1 of the first groove 522 and smaller than the second depth d2 of the second groove 524. You can. At this time, the first to third grooves 522, 524, and 526 have substantially the same width. That is, each of the first groove 522 and the third groove 526 has a smaller volume than the second groove 524.

The adhesive layer (not shown) formed on the cover window 530 is located between the cover window 530 and the display panel (not shown) and covers a portion of the light blocking pattern 520. The adhesive layer may be made of optically transparent resin.

The adhesive layer may cover the first to third grooves 522, 524, and 526. Alternatively, the end of the adhesive layer may be located between the first and third grooves 522 and 526 or between the second and third grooves 526 and 524.

In the present invention, since the first and second grooves 422 and 424 are formed in the light blocking pattern 420, the surface area of the light blocking pattern 420 increases. Accordingly, the adhesive force (adhesion) between the adhesive layer and the cover window 530 increases.

Additionally, the area of the adhesive layer is adjusted by the first to third grooves 522, 524, and 526. That is, the first groove 522 acts as a buffer pattern for the flow of the liquid adhesive, the second groove 524 acts as a blocking pattern for the flow of the liquid adhesive, and the third groove ( 526) acts as a buffer pattern and/or blocking pattern for the flow of liquid adhesive.

Accordingly, the end of the adhesive layer is located between the first groove 522 and the second groove 524.

In the display device including the cover window 530 of the present invention, the adhesive layer has a desired area due to the first to third grooves 522, 524, and 526, thereby increasing the adhesive force (adhesion) between the cover window 530 and the display panel. This is improved and damage to the adhesive layer is prevented. Additionally, the first to third grooves 522, 524, and 526 increase the adhesive area between the adhesive layer 140 and the cover window 530, further improving the adhesion between the cover window 530 and the display panel.

Accordingly, the present invention can provide a durable display device.

Figure 9 is a schematic plan view of a cover window of a display device according to a fourth embodiment of the present invention.

As shown in FIG. 9, in the cover window 630 of the display device according to the fourth embodiment of the present invention, the light blocking patterns 620 corresponding to the non-display area around the display area DA are spaced apart from each other. First and second grooves 622 and 624 surrounding the display area DA and a plurality of third grooves 626 located between the first and second grooves 622 and 624 are formed.

The cover window 630 of the display device according to the fourth embodiment of the present invention shown in FIG. 9 includes the cover window 530 of the display device according to the third embodiment of the present invention shown in FIG. 8 and the third groove ( 626), there is a difference only.

That is, while the third groove 526 in FIG. 8 has a closed curve shape between the first and second grooves 522 and 524, the third groove 626 in FIG. 9 has the shape of a plurality of spaced apart patterns.

Figure 10 is a schematic plan view of a cover window of a display device according to a fifth embodiment of the present invention.

As shown in FIG. 10, in the cover window 730 of the display device according to the fifth embodiment of the present invention, the light blocking patterns 720 corresponding to the non-display area around the display area DA are spaced apart from each other. First and second grooves 722, 724 surrounding the display area DA, a third groove 726 located between the first and second grooves 722, 724, and the first and second grooves 726 A fourth groove 728 connecting the three grooves 722 and 726 is formed.

The cover window 730 of the display device according to the fifth embodiment of the present invention shown in FIG. 10 includes the cover window 530 of the display device according to the third embodiment of the present invention shown in FIG. 8 and the fourth groove ( 728), there is a difference only.

In the cover window 730 of the display device according to the fifth embodiment of the present invention, the adhesive flow from the first groove 722 to the third groove 726 increases due to the fourth groove 728, , it becomes easier to form the end of the adhesive layer (not shown) at a desired position between the first groove 722 and the second groove 724.

Figure 11 is a schematic plan view of a cover window of a display device according to a sixth embodiment of the present invention.

As shown in FIG. 11, in the cover window 830 of the display device according to the sixth embodiment of the present invention, the light blocking patterns 820 corresponding to the non-display area around the display area DA are spaced apart from each other. First and second grooves 822, 824 surrounding the display area DA, a plurality of third grooves 826 located between the first and second grooves 822, 824, and the first A plurality of fourth grooves 828 are formed connecting the groove 822 and the plurality of third grooves 822 and 826.

The cover window 830 of the display device according to the sixth embodiment of the present invention shown in FIG. 11 includes the cover window 630 of the display device according to the fourth embodiment of the present invention shown in FIG. 9 and the fourth groove ( 828), there is a difference only.

In the cover window 830 of the display device according to the sixth embodiment of the present invention, the adhesive flow from the first groove 822 to the third groove 826 increases due to the fourth groove 828, , it becomes easier to form the end of the adhesive layer (not shown) at a desired position between the first groove 822 and the second groove 824.

Figure 12 is a schematic plan view of a cover window of a display device according to a seventh embodiment of the present invention.

As shown in FIG. 12, in the cover window 930 of the display device according to the seventh embodiment of the present invention, the light blocking patterns 920 corresponding to the non-display area around the display area DA are spaced apart from each other. First and second grooves 922 and 924 surrounding the display area DA and a plurality of third grooves 926 located between the first and second grooves 922 and 924 are formed.

The cover window 930 of the display device according to the seventh embodiment of the present invention shown in FIG. 12 includes the cover window 630 of the display device according to the fourth embodiment of the present invention shown in FIG. 9 and the third groove ( There is a difference only in 926).

In the cover window 930 of the display device according to the seventh embodiment of the present invention, the third groove 926 protrudes from the first groove 922 toward the second groove 924, and the third groove 926 protrudes from the first groove 922 toward the second groove 924. The flow of adhesive from the first groove 922 to the second groove 924 increases due to the groove 926. Accordingly, it becomes easier to form the end of the adhesive layer (not shown) at a desired position between the first groove 922 and the second groove 924.

A display device using a cover window in which first and second grooves are formed and the second groove has a width three times larger than the first groove (experimental example), and a display device using a conventional cover window in which no groove is formed (comparison The adhesion strength in Example) was measured and listed in Table 1 below. At this time, Dexerials' HSVR300 product was used as the adhesive layer. (Measure adhesion at the four corners of the display device after complete curing)

[Table 1]

As shown in Table 1, the adhesion between the cover window and the display panel increased in the display device (experimental example) including the cover window according to the embodiment of the present invention. Additionally, the problem of uneven adhesion depending on location in the display device was solved.

That is, as described above, in the present invention, grooves are formed in the light-shielding pattern of the cover window, thereby improving the adhesion between the cover window and the display panel by the adhesive layer, and thus providing a display device with improved durability.

Although the present invention has been described above with reference to preferred embodiments, those skilled in the art may modify the present invention in various ways without departing from the technical spirit and scope of the present invention as set forth in the claims below. and that it can be changed.

100, 400: display device 101, 401: display panel
120, 420, 520, 620, 720, 820, 920: Shading pattern
122, 124, 422, 424, 522, 524, 526, 622, 624, 626, 628, 722, 724, 726, 728, 922, 924, 926: Home
130, 430, 530, 630, 730, 830, 930: Cover window
140, 440: Adhesive layer

Claims (12)

a base defining a display area and a non-display area around the display area; a cover window located on one side of the base, corresponding to the non-display area, and including a light-shielding pattern including a first groove surrounding the display area and a second groove surrounding the first groove;
a display panel positioned corresponding to the one side of the cover window;
Comprising an adhesive layer located between the display panel and the cover window,
The first groove has a smaller volume than the second groove, and the adhesive layer fills the first groove.

delete According to claim 1,
The first groove has a smaller width than the second groove.
According to claim 1,
The display device wherein the first groove has a smaller depth than the second groove.
According to claim 1,
The light blocking pattern further includes a third groove located between the first groove and the second groove.
According to claim 5,
The third groove is parallel to the first and second grooves.
According to claim 6,
The light blocking pattern further includes a fourth groove connecting the first groove and the third groove.
According to claim 5,
The third groove is connected to the first groove.
According to claim 1,
A display device wherein the depth of each of the first and second grooves is smaller than the thickness of the light blocking pattern.

delete According to claim 1,
An end of the adhesive layer is positioned between the first and second grooves.
According to claim 1,
The adhesive layer covers the first and second grooves.

Images