KR101957839B1 - Display device and method of fabricating the same - Google Patents

Abstract

A display device and a method of manufacturing the same according to the present invention are characterized in that in a side sealing process for closing a side surface of a panel using a black sealant, a foaming agent is added to the black sealant, To thereby prevent side light leakage of the narrow bezel display device and at the same time to secure a good appearance of the product. And a light leakage preventing member formed on a side surface of the panel to prevent side light leakage and including a base resin, a photoinitiator, and an additive, wherein the additive includes a foaming agent to induce minute bubbles on the surface of the light leakage preventing member, And scattering light.

Description

Technical Field [0001] The present invention relates to a display device and a method of manufacturing the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device and a method of manufacturing the same, and more particularly, to a display device in which a narrow bezel is implemented by applying side sealing and a method of manufacturing the same.

In recent information society, display device is more emphasized as a visual information delivery medium and it is necessary to meet requirements such as low power consumption, thinning, light weight, and high image quality in order to take a major position in the future.

A flat panel display device such as a thin film transistor (TFT) liquid crystal display (LCD), an organic light emitting display (OLED), and an electrophoresis display device has been developed It replaces the existing cathode ray tube (CRT).

Such a flat panel display device has been able to increase the size of the device by reducing the weight and volume thereof, and has continuously made research and development on the response speed and image quality, and has made a lot of improvements in terms of quality.

In recent years, along with the research and development in such technical aspects, the necessity of research and development in the design of the product, which can appeal to the consumers, is particularly emphasized. Accordingly, efforts to minimize the thickness of the display device have been steadily progressing, and there has been an increasing demand for a design in which aesthetics that stimulate purchasing appeal to the aesthetic sense of a consumer, and which are enhanced.

Hereinafter, a general display device will be described with reference to the drawings by taking a liquid crystal display device as an example.

1 is an exploded perspective view schematically showing a structure of a general liquid crystal display device.

As shown in the figure, a typical liquid crystal display device includes a panel 10 in which pixels are arranged in a matrix to output an image, drivers 15 and 16 for driving the pixels, And a panel guide 45 for receiving and fixing the panel 10 and the backlight unit.

Although not shown in detail, the panel 10 is composed of a color filter substrate and an array substrate, which are aligned so as to face each other and maintain a uniform cell gap, and a liquid crystal layer formed in a cell gap between the color filter substrate and the array substrate.

A common electrode and a pixel electrode are formed on the panel 10 to which the color filter substrate and the array substrate are bonded to each other. An electric field is applied to the liquid crystal layer. When a voltage is applied to the common electrode, The liquid crystal of the liquid crystal layer is rotated by dielectric anisotropy according to an electric field between the common electrode and the pixel electrode to transmit or block light for each pixel to display characters or images.

In order to control the voltage of the data signal applied to the pixel electrode on a pixel-by-pixel basis, a switching element such as a thin film transistor is separately provided in the pixels.

The upper and lower polarizers (not shown) are attached to the outside of the panel 10, and the lower polarizer polarizes the light passing through the backlight unit. Polarizes the light passing through.

A light emitting diode (LED) assembly 30 for generating light is provided on one side of a light guide plate 42. The backlight unit 30 includes a light guide plate 42, A reflection plate 41 is provided.

The LED assembly 30 includes an LED array 31 and an LED housing 32 to which an LED printed circuit board (PCB) (not shown) for driving the LED array 31 is attached. Lt; / RTI >

The light emitted from the LED array 31 is incident on a side surface of the light guide plate 42 of transparent material and the reflection plate 41 disposed on the back surface of the light guide plate 42 is transmitted to the back surface of the light guide plate 42 The light is reflected toward the optical sheets 43 on the upper surface of the light guide plate 42 to reduce light loss and improve the uniformity.

The panel 10 composed of the color filter substrate and the array substrate is mounted on the upper part of the backlight unit constructed as described above through the panel guide 45. The panel 10 and the panel guide 45 and the backlight unit are screwed And a liquid crystal display device is constructed by combining the liquid crystal display device with a cover bottom 50 and a case top 60 at the bottom.

Since the cover bottom 50 and the case top 60 are essentially used for fixing the liquid crystal display device, the thickness of the liquid crystal display device or the design can not be changed.

Particularly, since the case top 60 covers the top edge of the panel 10, the thickness of the liquid crystal display device can be increased, and the width of the bezel, which is the edge of the liquid crystal display device, A step is formed between the panel 10 and the panel 10, which has been a barrier to devising diverse and delicate designs.

In this case, a light leakage problem occurs in which the light emitted from the backlight unit leaks to the side surface of the panel 10.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device and a method of manufacturing the display device in which a narrow bezel is implemented by applying side sealing.

Another object of the present invention is to provide a display device using the low-gloss sealant to secure a good appearance of a product in a display device using the side sealing, and a method of manufacturing the same.

Other objects and features of the present invention will be described in the following description of the invention and the claims.

According to an aspect of the present invention, there is provided a display device including a panel for outputting an image; And a light leakage preventing member formed on a side surface of the panel to prevent side light leakage and including a base resin, a photoinitiator, and an additive, wherein the additive includes a foaming agent to induce minute bubbles on the surface of the light leakage preventing member, And scattering light.

The additive according to claim 1, wherein the additive further comprises a light shielding material and a curing accelerator.

And the base resin is made of an acrylic copolymer resin.

At this time, the base resin made of an acrylate-based resin is characterized in that it is obtained by irradiating ultraviolet rays to a composition comprising a crosslinkable monomer and a reactive oligomer.

The crosslinkable monomer may be 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, 1,3-butylene glycol diacrylate, neopentyl glycol diacrylate, ethylene glycol diacrylate, Diethylene glycol diacrylate, diethylene glycol diacrylate, propylene glycol dimethacrylate, pentaerythritol tetraacrylate, pentaerythritol diacrylate, pentaerythritol triacrylate, dipentaerythritol triacrylate, dipentaerythritol pentaacrylate , Pentaerythritol hexaacrylate, triethylene glycol diacrylate, polyethylene glycol diacrylate, dipentaerythritol diacrylate, sorbitol triacrylate, bisphenol A diacrylate derivatives, trimethylpropane triacrylate, and methacrylic acid derivatives thereof Lt; RTI ID = 0.0 > of the < / RTI >

The acrylate resin may be at least one selected from the group consisting of 2-ethylhexyl acrylate, tridecyl methacrylate, nonylphenol ethoxylate monoacrylate, beta-carboxyethyl acrylate, isobornyl acrylate, tetrahydroperfuryl acrylate, Selected from the group consisting of acrylic acid, methacrylic acid, methacrylic acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, And is made of at least one material.

Characterized in that the light blocking material comprises colored particles of carbon black.

In this case, the light blocking material may further include a plate-like particle made of a metal oxide.

The curing accelerator is characterized by comprising light diffusing particles.

The foaming agent is characterized by containing an azodicarbonamide (ADCA) series blowing agent.

The foaming agent induces fine bubbles on the surface of the light-preventing member to adjust the surface smoothness to be larger than the visible light region, thereby scattering the incident light.

A method of manufacturing a display device of the present invention includes: providing a panel for outputting an image; Attaching a hydrophilic functional group to the foaming agent; Adding the blowing agent having the hydrophilic functional group to the black sealant; Jetting the black sealant to which the blowing agent is added to the side of the panel and performing a pre-curing process; And a post curing process to finish the sealing.

At this time, the foaming agent is characterized by containing an azodicarbonamide-based foaming agent.

The blowing agent is contained in an amount of 0.1 to 5% by weight based on the whole black sealant.

And the foaming agent is guided to the black sealant surface by the hydrophilic functional group during the preliminary curing step.

At this time, the blowing agent induced on the black sealant surface forms minute bubbles on the black sealant surface.

As described above, the display device and the method of manufacturing the same according to the present invention are characterized in that, in the side sealing of a side surface of a panel using a black sealant, a foaming agent is added to the black sealant, Thereby preventing side light leakage of the low-bezel display device and securing a good appearance of the product.

1 is an exploded perspective view schematically showing a structure of a general liquid crystal display device.
2 is a plan view schematically showing the structure of a liquid crystal display device according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view of an LCD according to an embodiment of the present invention shown in FIG. 2, taken along line AA.
4 is an exemplary view showing the composition of a black sealant according to an embodiment of the present invention.
Figures 5A through 5C show the synthesis of a urethane acrylate oligomer in black sealant according to an embodiment of the present invention.
6 is an exemplary view showing the composition of a foaming agent in a black sealant according to an embodiment of the present invention.
7 is a diagram showing an example of the blowing agent shown in Fig.
8 is a flowchart sequentially illustrating a method of manufacturing a display device according to an embodiment of the present invention.
FIG. 9 is a flowchart sequentially illustrating a side sealing step in the method of manufacturing the display device according to the embodiment of the present invention shown in FIG.
10A to 10C are cross-sectional views sequentially showing a side sealing step in the method of manufacturing the display device according to the embodiment of the present invention shown in FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

2 is a plan view schematically showing the structure of a liquid crystal display device according to an embodiment of the present invention.

3 is a schematic cross-sectional view taken along line A-A of the liquid crystal display according to the embodiment of the present invention shown in FIG.

At this time, although the liquid crystal display device is described as an example of a display device in the present embodiment, the present invention is not limited thereto, and the present invention is also applicable to other flat panel display devices such as an organic light emitting display device and an electrophoretic display device.

Referring to the drawings, a liquid crystal display ("LCD") according to an embodiment of the present invention includes a panel 110 in which pixels are arranged in a matrix form in a pixel unit AA, a driving unit 115 for driving the pixels, A backlight unit (not shown) installed on the rear surface of the panel 110 to supply light over the entire surface of the panel, and a panel guide (not shown) for receiving and fixing the panel 110 and the backlight unit.

The panel 110 includes a color filter substrate 101 and an array substrate 102 bonded to each other such that a uniform cell gap is maintained so as to face the color filter substrate 101 and the array substrate 102, And a liquid crystal layer (not shown).

Although not shown, the color filter substrate 101 is divided into a color filter composed of a plurality of sub-color filters implementing the colors of red, green and blue, A black matrix for blocking light transmitted through the liquid crystal layer, and a transparent common electrode for applying a voltage to the liquid crystal layer.

The array substrate 102 includes a plurality of gate lines and data lines arranged vertically and horizontally to define a plurality of pixel regions, a thin film transistor serving as a switching element formed in a crossing region between the gate lines and the data lines, Lt; / RTI > At this time, in the case of a transverse electric field type liquid crystal display device, a common electrode is formed on the array substrate 102 instead of the color filter substrate 101.

A common electrode and a pixel electrode are formed on the panel 110 where the color filter substrate 101 and the array substrate 102 are bonded together to apply an electric field to the liquid crystal layer. When the voltage of the data signal applied to the pixel electrode is controlled, the liquid crystal of the liquid crystal layer rotates by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode, .

In order to control the voltage of the data signal applied to the pixel electrode on a pixel-by-pixel basis, a switching element such as a thin film transistor is separately provided in the pixels.

The upper and lower polarizers 103 and 104 are attached to the outside of the panel 110. The lower polarizer 104 polarizes the light passing through the backlight unit and the upper polarizer 103, Polarizes the light passing through the panel 110. [

Although not shown, the backlight unit will be described in detail. For example, a reflector may be provided on a cover bottom, and an LED array may be provided on at least one side of the reflector to emit light. A light guide plate for emitting light generated in the LED array toward the panel 101 may be installed.

The light emitted from the LED array is incident on a side surface of the light guide plate having a transparent material. The reflection plate disposed on the back surface of the light guide plate reflects light transmitted to the back surface of the light guide plate toward the optical sheets on the upper surface of the light guide plate, And the uniformity is improved.

Here, the optical sheets according to the embodiments of the present invention include a diffusion sheet, an upper and a lower prism sheet, and a protective sheet may be added.

At this time, not only an edgy type installed on one side of the light guide plate but also a direct type installed on the back side of the panel 110 may be applied to the light source.

A panel 110 composed of the color filter substrate 101 and the array substrate 102 is seated on the upper part of the backlight unit thus configured through a panel guide. The panel 110, the panel guide, and the backlight unit And are coupled to each other by a lower cover bottom through a plurality of fastening means to constitute a liquid crystal display device.

As described above, according to the liquid crystal display device according to the embodiment of the present invention, the thickness of the liquid crystal display device can be reduced by removing the existing case top covering the edge of the panel 110, the width of the bezel of the liquid crystal display device can be reduced, And the step on the front surface of the apparatus can be removed.

At this time, by removing the case tower, light emitted from the backlight unit can leak to the side of the panel 110 through total internal reflection. Therefore, in the embodiment of the present invention, Shielding member 120 is additionally formed on the side surface of the panel 110 in order to block the side surface and to close the side surface. That is, the light leakage preventing member 120 may be formed on the side surfaces of the color filter substrate 101 and the array substrate 102.

The light leakage preventing member 120 may extend to the upper surface of the color filter substrate 101 and may be formed on the upper polarizer 103 formed on the color filter substrate 101, So as to prevent peeling of the upper polarizer 103. The light-preventing member 120 may extend to the lower surface of the array substrate 102.

The light leakage preventing member 120 reinforces the combined force of the color filter substrate 101 and the array substrate 102 and closes the edge portion of the exposed panel 110 that is not covered by the structure, Shielding the light leakage leaking through the side surface of the panel 110.

The panel 110 is generally rectangular in shape so that the light leakage preventing member 120 can be formed on all four sides of the panel 110. However, When the circuit board (flexible printed circuit film) is used, the light leakage preventing member 120 may be formed on only three sides of the panel 110.

The light leakage preventing member 120 may be formed by curing a black sealant of a black resin with ultraviolet (UV) light. At this time, due to the surface gloss of the cured black sealant, The surface of the member 120 may have bright and dark portions due to ruggedness. That is, in the actual process, the black resin is applied by a jetting method, and the surface of the light leakage preventing member 120 has a rugged shape according to the jetting.

In order to solve this problem, it is possible to spray a matting agent using silica. In this case, even if the inorganic silica powder is dispersed in the ultraviolet ray hardening resin having a low viscosity, The workability is deteriorated because it is used.

Accordingly, the embodiment of the present invention provides a method for reducing the glossiness by inducing diffuse reflection on the surface by adding a foaming agent to the black sealant by another method.

4 is a view illustrating an exemplary composition of a black sealant according to an embodiment of the present invention.

5A to 5C are diagrams showing the synthesis of a urethane acrylate oligomer as an example of an acrylic copolymerization resin in a black sealant according to an embodiment of the present invention.

Referring to FIG. 4, the black sealant according to an exemplary embodiment of the present invention may include a base resin 171, a photoinitiator, and additives.

At this time, the additive may include a light blocking material 172, a curing accelerator 173, and a foaming agent 174.

The base resin 171 is a material that becomes the base of the black sealant while bonding the light blocking material 172, the curing accelerator 173 and the foaming agent 174.

The base resin 171 may be made of an acrylic copolymer resin, but is not limited thereto. For example, the base resin 171 made of an acrylate-based resin can be obtained by reacting a composition comprising a crosslinkable monomer and a reactive oligomer by irradiating light such as ultraviolet rays.

Examples of the crosslinkable monomer include 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, 1,3-butylene glycol diacrylate, neopentyl glycol diacrylate, ethylene glycol diacrylate, diethylene Glycol diacrylate, propylene glycol dimethacrylate, pentaerythritol tetraacrylate, pentaerythritol diacrylate, pentaerythritol triacrylate, dipentaerythritol triacrylate, dipentaerythritol pentaacrylate, pentaerythritol triacrylate, Ethylene glycol diacrylate, dipentaerythritol diacrylate, sorbitol triacrylate, bisphenol A diacrylate derivatives, trimethylpropane triacrylate, and methacrylates thereof, such as ethylene glycol diacrylate, ethylene glycol diacrylate, Lt; / RTI >

As shown in FIGS. 5A to 5C, the synthesis of the urethane acrylate series as the reactive oligomer is performed by first synthesizing polyol and diisocyanate to react with each other to form an isocyanate terminal Can be prepared by reacting an acrylate containing a hydroxyl group with an isocyanate.

The acrylate resin may be at least one selected from the group consisting of 2-ethylhexyl acrylate, tridecyl methacrylate, nonylphenol ethoxylate monoacrylate, beta-carboxyethyl acrylate, isobornyl acrylate, tetrahydroperfuryl acrylate, Selected from the group consisting of acrylic acid, methacrylic acid, methacrylic acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, fumaric acid, It can be one or more substances.

The base resin 171 may be contained in an amount ranging from 20 to 90% by weight with respect to the entire black sealant, and the photoinitiator may be included in an amount ranging from 1 to 5% by weight with respect to the entire black sealant.

Next, the light blocking material 172 is a material for preventing light from leaking. That is, the light blocking material 172 is a key material that performs the main function of the black sealant.

The light blocking material 172 comprises colored particles 172a.

At this time, black particles such as carbon black can be used as the colored particles 172a, but the present invention is not limited thereto, and various colored particles capable of realizing a light shielding effect can be used. By way of example, it can be used as titanium oxide (TiO ₂₎ the particles colored particles (172a).

It is preferable that the colorant particles 172a have a particle size of 1000 nm or less because when the particle size of the colored particles 172a exceeds 1000 nm, when the black sealant is applied by a dispenser, the packing wear of the dispenser nozzle .

The colored particles 172a may be included in the black sealant in an amount of 1 to 20% by weight.

The light blocking material 172 may further include a plate-shaped particle 172b. In the case where the plate-shaped particle 172 includes the plate-like particle 172b as compared with the case where the plate-like particle 172b is not included, .

That is, when the plate-shaped particles 172b are included, light is blocked by the plate-shaped particles 172b, thereby preventing light leakage more effectively. Particularly, the plate-shaped particles 172b can be arranged while maintaining their directionality by shrinkage during the curing process, and thus can perform an effective light shielding function. In addition, a side effect that the arrangement of the colored particles 172a is uniformly aligned by the plate-shaped particles 172b can be obtained.

The plate-like particles (172b), but may be made of metal oxide such as aluminum oxide (Al ₂ O _3), it is not necessarily so limited. Like the above-mentioned colored particles 172a, the particle size of the plate-like particles 172b is preferably 1000 nm or less.

The content of the plate-like particles 172b is preferably 5% or less and is not necessarily included, and can be omitted depending on the case.

The curing accelerator 173 is a material for facilitating curing of the base resin 171.

The curing accelerator 173 may include light diffusion particles. That is, for example, when the light diffusion particles are included, ultraviolet rays irradiated upon ultraviolet curing may be diffused in the light diffusion particles at various angles, and thus the base resin 171 may be irradiated with a larger amount of ultraviolet light So that curing of the base resin 171 can be facilitated.

The light-diffusing particles may be spherical or amorphous particles having a high refractive index of 1.5 or more. Particularly, the light diffusion particles are made of a material having a refractive index higher by 0.01 or more, preferably 0.05 or more, than the base resin 171 is suitable for obtaining a light diffusion effect. Such light diffusing particles may be made of polystyrene (PS), polycarbonate (PC), or polyethylene terephthalate (PET), but the present invention is not limited thereto.

The particle size of the light diffusion particles is preferably 1000 nm or less in order to prevent packing wear of the dispenser nozzle.

The curing accelerator 173 may include a blue pigment.

When the blue pigment is included, the transmittance of the ultraviolet ray irradiated for ultraviolet curing is raised, and the curing of the base resin 171 can be promoted. That is, when the blue pigment is used as the curing accelerator 173, the transmittance of ultraviolet light can be improved in the wavelength range of about 400 nm, more specifically, in the wavelength range of 380 nm to 420 nm, The effect of irradiating the ultraviolet rays of the ultraviolet rays can be obtained.

The blue pigment preferably has a particle size of 1000 nm or less.

The hardening accelerator 173 may include both the light diffusing particles and the blue pigment, but may be composed of only the light diffusing particles or may be composed of only the blue pigment.

The curing accelerator 173 may be included in the range of 0.1 to 5% by weight based on the entire black sealant.

Next, the foaming agent 174 generates fine bubbles on the surface of the light-preventing member 120 through curing to induce irregular reflection of light, thereby realizing a matte effect.

6 is a view illustrating an example of the composition of the blowing agent in the black sealant according to the embodiment of the present invention.

FIG. 7 is a drawing showing an example of the blowing agent shown in FIG. 6 by chemical formula, and shows an azodicarbonamide (ADCA) series blowing agent as an example.

Referring to the drawings, the blowing agent 174 according to the embodiment of the present invention is added to the black sealant 170 with the hydrophilic functional group 175 attached thereto.

As the foaming agent 174, an azodicarbonamide-based foaming agent may be used.

During the process of polyaddition reaction with the foaming agent 174, gas is generated and microbubbles are generated. When the azodicarbonamide blowing agent is added to the polyol in the synthesis of the above-mentioned reactive oligomer, these materials react with the isocyanate to generate microbubbles of carbon dioxide or carbon monoxide.

The blowing agent 174 may be included in the range of 0.1 to 5% by weight based on the entire black sealant. For reference, these weight percentages should be 100 weight percent total, but may be less than 100 weight percent overall if other impurities are present.

As described above, in the display device according to the embodiment of the present invention, the foaming agent is added to the black sealant to generate fine bubbles on the surface to induce irregular reflection, so that a pleasant appearance of the product can be secured due to low gloss. That is, the smoothness of the surface of the light-preventing member is adjusted to be larger than that of the visible light region to scatter the incident light, thereby providing a matte effect.

In recent years, as users' emotional quality levels have increased, they have been able to meet the demand for a more refined atmosphere.

Hereinafter, a method of manufacturing a display device according to an embodiment of the present invention will be described in detail with reference to the drawings.

8 is a flowchart sequentially illustrating a method of manufacturing a display device according to an embodiment of the present invention.

FIG. 9 is a flowchart sequentially illustrating a side sealing step in the method of manufacturing the display device according to the embodiment of the present invention shown in FIG.

FIGS. 10A to 10C are cross-sectional views sequentially illustrating the side sealing step in the method of manufacturing the display device according to the embodiment of the present invention shown in FIG.

8 illustrates a method of manufacturing a liquid crystal display device in which a liquid crystal layer is formed by a liquid crystal dropping method. However, the present invention is not limited thereto, and the present invention can be applied to a liquid crystal display The present invention can be applied to a manufacturing method of a liquid crystal display device.

In addition, although a liquid crystal display device is described as an example of a display device as described above, the present invention is not limited thereto, and the present invention is also applicable to other flat panel display devices such as an organic light emitting display device and an electrophoretic display device.

The manufacturing process of the liquid crystal display device can be largely divided into a driving element array process for forming driving elements on the lower array substrate, a color filter process for forming a color filter on the upper color filter substrate, and a cell process.

First, a plurality of gate lines and data lines which are arranged in an array substrate and define a pixel region are formed by an array process, and a thin film transistor which is a driving element connected to the gate line and the data line is formed in each of the pixel regions (S101 ). In addition, a pixel electrode connected to the thin film transistor through the array process and driving the liquid crystal layer as a signal is applied through the thin film transistor is formed.

In addition, the color filter substrate is formed with a color filter layer composed of red, green, and blue sub-color filters that implement color by the color filter process and a common electrode (S102). At this time, when the transverse electric field type liquid crystal display device is manufactured, the common electrode is formed on the array substrate on which the pixel electrode is formed through the array process.

Then, after aligning films are printed on the color filter substrate and the array substrate, alignment control force or surface fixing force (that is, pretilt angle and orientation) is applied to the liquid crystal molecules of the liquid crystal layer formed between the color filter substrate and the array substrate Direction) of the alignment film is provided (S103, S104).

A sealing material is applied to the rubbed color filter substrate to form a predetermined seal pattern, and a liquid crystal layer is formed by dropping liquid crystal on the array substrate (S105, S106).

At this time, a plurality of the color filter substrate and the array substrate are divided into a large-sized mother substrate. In other words, a plurality of panel regions are defined in a large-sized mother substrate, and thin film transistors and color filters, which are driving elements, are formed in each of the panel regions.

At this time, the dropping system dispenses liquid crystal to an image display area of a large-area first mother substrate on which a plurality of array substrates are arranged or a second mother substrate on which a plurality of color filter substrates are arranged using a dispenser, And the liquid crystal is uniformly distributed over the entire image display area by the pressure for attaching the first and second mother substrates to each other, thereby forming a liquid crystal layer.

Therefore, when the liquid crystal layer is formed on the second mother substrate through the dropping method, the seal pattern must be formed in a closed pattern surrounding the periphery of the pixel region so as to prevent the liquid crystal from leaking out of the image display region.

The dropping method can drop the liquid crystal in a shorter time than the vacuum injection method, and the liquid crystal layer can be formed very quickly even when the panel is enlarged. In addition, since only a necessary amount of liquid crystal is dropped onto the substrate, it is possible to prevent an increase in the price of the panel due to the disposal of the expensive liquid crystal such as the vacuum injection method, thereby enhancing the price competitiveness of the product.

Thereafter, the first mother substrate and the second mother substrate are bonded together by applying a pressure in a state in which the first mother substrate and the second mother substrate, to which the liquid crystal is dropped and the sealing material is coated, are aligned, The liquid crystal dropped by the application of pressure is uniformly spread over the entire panel (S107).

By this process, a large number of unit panels having liquid crystal layers are formed on the first and second large-sized mother substrates, and the first and second mother substrates are processed and cut into a plurality of unit panels (S108 ).

At this time, in order to implement the low-bezel, the case top is removed in the embodiment of the present invention. In this state, the side sealing process is performed to close the side surface of the joined panel in order to block the light leakage from the panel side S109).

For this purpose, a black sealant comprising a base resin, a photoinitiator and additives is prepared as described above.

In this case, the black sealant according to the present invention may include a foaming agent for realizing a matte finish treatment of the light-shielding member after curing. To this end, a hydrophilic functional group is attached to a predetermined foaming agent and then added to a black sealant (S210, S202).

For example, an azodicarbonamide-based foaming agent may be used as the foaming agent.

The blowing agent may be included in the range of 0.1 to 5% by weight based on the whole black sealant.

10A, a black sealant 170 according to an embodiment of the present invention to which such a foaming agent 174 is added is disposed between the color filter substrate 101 and the panel 102 to which the array substrate 102 is adhered, And the shape is realized through a pre-curing process (S109-1, S203, S204).

At this time, the foaming agent 174 is led to the surface of the black sealant 170 by the hydrophilic functional group 175, as shown in FIG. 10B.

10C, the foaming agent forms fine bubbles 176 on the surface of the black sealant 170 to induce scattering of light on the surface of the light-shielding member 120 after curing to provide a matte effect .

That is, as described above, the microbubbles 176 are generated by generating gas during the middle addition reaction with the blowing agent. In the synthesis of the above-mentioned reactive oligomer, when the azodicarbonamide blowing agent is added to the polyol, the materials react with the isocyanate to generate minute bubbles 176 of carbon dioxide or carbon monoxide.

As described above, the foaming agent generates microbubbles 176 on the surface of the light-leakage preventing member 120 through curing to induce irregular reflection of light, thereby realizing a matte effect.

Thereafter, the seal is finished through a batch post curing process, and the defect is determined by implementing the appearance shape and the simple attachment test (S109-2, S109-3).

After completing the remaining cell processes, each panel is inspected to fabricate a liquid crystal display device (S110).

While a great many are described in the foregoing description, it should be construed as an example of preferred embodiments rather than limiting the scope of the invention. Therefore, the invention should not be construed as limited to the embodiments described, but should be determined by equivalents to the appended claims and the claims.

101: color filter substrate 102: array substrate
103, 104: polarizer 110: panel
120: light-preventing member 171: base resin
172: light blocking material 172a: colored particle
172b: Platelet-shaped particles 173: Curing accelerator
174: foaming agent 175: hydrophilic functional group
176: Micro bubbles

Claims (17)

A panel for outputting an image; And
And a light leakage preventing member formed on a side surface of the panel to prevent lateral light leakage and comprising a base resin, a photoinitiator and an additive,
Wherein the additive includes a foaming agent, a light blocking material, and a curing accelerator to induce fine bubbles on a surface of the light leakage preventing member to scatter incident light. delete The display device according to claim 1, wherein the base resin is made of an acrylic copolymer resin. 4. The display device according to claim 3, wherein the base resin made of an acrylate-based resin is obtained by irradiating ultraviolet rays to a composition comprising a crosslinkable monomer and a reactive oligomer. 5. The composition according to claim 4, wherein the crosslinking monomer is 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, 1,3-butylene glycol diacrylate, neopentyl glycol diacrylate, ethylene glycol Diethylene glycol diacrylate, diethylene glycol diacrylate, propylene glycol dimethacrylate, pentaerythritol tetraacrylate, pentaerythritol diacrylate, pentaerythritol triacrylate, dipentaerythritol triacrylate, dipentaerythritol triacrylate, Polyglycol diacrylate, dipentaerythritol diacrylate, sorbitol triacrylate, bisphenol A diacrylate derivatives, trimethylpropane triacrylate, and trimethylolpropane triacrylate. And a material selected from the group consisting of these methacrylates Display apparatus as. 5. The composition of claim 4, wherein the acrylate resin is selected from the group consisting of 2-ethylhexyl acrylate, tridecyl methacrylate, nonylphenol ethoxylate monoacrylate, beta-carboxyethyl acrylate, isobornyl acrylate, Acrylate, tetrahydrofurfuryl methacrylate, 4-butylcyclohexyl acrylate, dicyclopentenyl acrylate, dicyclopentenyloxyethyl acrylate, ethoxyethyl acrylate, ethoxylated monoacryl Wherein the display device is a display device. The display device according to claim 1, wherein the light blocking material comprises colored particles of carbon black. 8. The display device according to claim 7, wherein the light blocking material further comprises plate-shaped particles composed of a metal oxide. The display device of claim 1, wherein the curing accelerator comprises light diffusing particles. The display device according to claim 1, wherein the blowing agent comprises an azodicarbonamide (ADCA) series blowing agent. The display device according to claim 1, wherein the blowing agent induces minute bubbles on the surface of the light-blocking member to adjust the smoothness of the surface of the light-blocking member to be larger than a visible light region, thereby scattering the incident light. Providing a panel for outputting an image;
Attaching a hydrophilic functional group to the foaming agent;
Adding the blowing agent having the hydrophilic functional group to the black sealant;
Jetting the black sealant to which the blowing agent is added to the side of the panel and performing a pre-curing process; And
And performing a post curing process to finish the sealing. 13. The method of manufacturing a display device according to claim 12, wherein the foaming agent comprises an azodicarbonamide-based foaming agent. [13] The method of claim 12, wherein the blowing agent is present in an amount ranging from 0.1 to 5% by weight based on the entire black sealant. 13. The method of claim 12, wherein the foaming agent is introduced to the black sealant surface by the hydrophilic functional group during the pre-curing step. 16. The method of claim 15, wherein the blowing agent directed to the black sealant surface forms microbubbles on the black sealant surface. The display device of claim 1, further comprising an upper polarizer and a lower polarizer disposed on upper and lower portions of the panel, respectively, wherein the light leakage preventing member extends to an upper surface of the panel and contacts the upper polarizer.

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