KR101971049B1 - Display device - Google Patents

Abstract

The display device of the present invention can be manufactured by using a black sealant cured in dual light of ultraviolet (UV) and light emitting diodes (LED) a panel for outputting an image, for preventing lateral light leakage of a narrow bezel display device and improving loss of tact time due to curing by dual light; And a light leakage preventing member formed on a side surface of the panel to prevent side light leakage and comprising a base resin, a light blocking material and a curing promoting material, wherein the base resin has a main absorption peak And a photoinitiator consisting of a combination of a minor initiator having an absorption peak in the region of greater than 400 nm of the LED lamp curing machine.

Description

Display device {DISPLAY DEVICE}

The present invention relates to a display device, and more particularly, to a display device capable of implementing a narrow bezel by applying side sealing.

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 in which a narrow bezel is implemented by applying side sealing.

It is another object of the present invention to provide a display device for preventing side light leakage and improving loss of tact time due to curing in a display device using the side sealing.

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 comprising a base resin, a light blocking material and a curing promoting material, wherein the base resin has a main absorption peak And a photoinitiator consisting of a combination of a minor initiator having an absorption peak in the region of greater than 400 nm of the LED lamp curing machine.

The backlight unit may further include a backlight unit installed on a rear surface of the panel to supply light to the panel.

The cover may further include a cover bottom for fixing and fixing the panel and the backlight unit.

And the light leakage preventing member is made of a black sealant cured by the UV and LED lamp curing machine.

The base resin is formed of an acrylate-based polymer.

At this time, the acrylate-based polymer is composed of an acrylate monomer, at least one resin selected as a UV-curable acrylate-based resin reactive with a suitable wavelength, and the photoinitiator.

At this time, the photoinitiator is a combination of a main initiator having a main absorption peak at 385 nm (UV lamp curing machine) and a minor initiator having an absorption peak at 405 nm (LED lamp curing machine) in a long wavelength region.

At this time, in the absorption region calculation of the initiators, the main peak is not changed by Gaussian calculation, and the sub peak is combined so that the light absorption rate in the long wavelength region becomes 50 to 90% with respect to the main peak.

Characterized in that the light blocking material comprises colored particles.

In this case, the colored particles include carbon black.

Characterized in that the light shielding material further comprises plate-shaped particles.

In this case, the platelet-shaped particles are made of a metal oxide of aluminum oxide (Al ₂ O ₃ ).

And the curing accelerating material includes light diffusing particles.

In this case, the curing accelerator may include a blue pigment to enhance transmission of a long wavelength by UV.

As described above, the display device according to the present invention uses a black sealant that is cured to ultraviolet (UV) light and dual light of a light emitting diode (LED) Thereby providing the effect of preventing lateral light leakage of the narrow-bezel display device without losing the tack time due to curing.

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.
5 is an exemplary view showing the function of light diffusing particles in a black sealant according to an embodiment of the present invention.
FIG. 6 is a graph showing absorbance characteristics according to wavelengths of initiators. FIG.
FIGS. 7A to 7C are graphs separately showing absorbance characteristics of the initiators shown in FIG. 6; FIG.
8 is a graph showing transmittance characteristics according to wavelengths of a cured black sealant.
9A and 9B are graphs showing transmittance characteristics depending on whether or not a blue pigment is added.
10A and 10B are photographs showing the internal hardenability of the cured black sealant.
11 is a flowchart sequentially illustrating a method of manufacturing a display device according to an embodiment of the present invention.

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

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to 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) device according to an embodiment of the present invention includes a panel 110 for displaying pixels arranged in a matrix form, a driving unit 115 for driving the pixels, 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 is formed on the side surfaces of the color filter substrate 101 and the array substrate 102.

Although not shown, the light-blocking member 120 may extend to the upper surface of the color filter substrate 101, and may be in contact with the upper polarizer 103 formed on the color filter substrate 101, And may serve 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 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 prevention member 120 may be formed by curing a black sealant of black resin by ultraviolet (UV). In order to improve the light leakage prevention effect of the light leakage prevention member 120, Increase the degree of black.

However, if the blackness of the black sealant is increased, the UV transmittance of the black sealant is lowered, so that hardening of the deep part of the black sealant becomes difficult, and more UV exposure time is required in the same roughness.

Particularly, when a high-intensity LED light source is used, a material having a high optical density (OD) is required to block light leakage from the side of the panel 110, thereby increasing the tack time due to UV curing, There is a possibility that a defect in which the deep portion of the core is uncured. For reference, optical density is a numerical value that expresses the throughput of light through a medium, and light of a certain wavelength can be expressed as a portion of the total energy that passes through the medium.

Therefore, in the embodiment of the present invention, a black sealant which can be hardened not only in UV but also in a light emitting diode (LED) is used in order to increase the deep portion curing efficiency without reducing the tack time, Can be achieved through pigment control.

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

5 is a view illustrating an exemplary function of light diffusing particles in a black sealant according to an embodiment of the present invention.

Referring to FIG. 4, the black sealant according to the embodiment of the present invention comprises a base resin 171, a light blocking material 172, and a curing promoting material 173.

The base resin 171 is a material which becomes the base of the black sealant while bonding the light blocking material 172 and the curing promoting material 173.

The base resin 171 may be made of an acrylate-based polymer, but is not limited thereto. The base resin 171 made of an acrylate-based polymer can be obtained by reacting a composition comprising an acrylate monomer, an acrylate oligomer and a photoinitiator by irradiating light such as UV. In addition, the acrylate-based polymer may be composed of one or more resins selected from acrylate monomers and other resins reactive with a suitable wavelength in a commercially available UV-curable acrylate system, and the photoinitiator.

For example, the acrylate-based polymer may be prepared using an acrylate monomer, two types of urethane acrylate, and a photoinitiator. At this time, the urethane acrylate 1 may have a molecular weight of 1,000 to 5,000 and the urethane acrylate 2 may have a molecular weight of about 5,000 to 10,000.

At this time, the photoinitiator according to an embodiment of the present invention may be composed of a combination of two kinds of photoinitiators which are selected not only for UV but also for curing black sealant in an LED lamp curing machine.

The selection criteria of these two types of photoinitiators are as follows.

6 is a graph showing the absorbance characteristics according to the wavelengths of the initiators.

7A to 7C are graphs separately showing absorbance characteristics of the initiators shown in FIG. 6, and show the absorbance characteristics of Initiator 1, Initiator 2 and Initiator 3.

At this time, the initiators shown in the above figures are represented by Initiator 1, Initiator 2, and Initiator 3 for convenience of explanation.

Referring to the drawings, an initiator having the maximum absorption peak at 370 nm to 400 nm at a full width at half maximum (FWHM) of 15 nm at a wavelength of 385 nm is selected in anticipation of the wavelength of the mass- The curability was confirmed by the absorbance according to the following formula.

Depending on the type of initiator, serious surface and internal hardness balance problems may occur during thickening, and therefore, the most suitable initiator was selected through many experiments.

In addition, since one type of initiator may cause problems in terms of surface and internal hardness during curing, materials that can be used in a dual system of UV and LED lamp curing machines were selected through various combinations.

Among the initiators thus selected, the initiator 1 exhibits a wide absorption range up to the long wavelength band beyond UV, so that it is difficult to use the UV absorber because of its ability to control the UV selective wavelength. For example, the initiators 2 and 3 exhibit maximum absorption peaks at 370 nm to 400 nm And the efficiency of curing is not deteriorated. Thus, a combination of these materials can be selected as a material usable in a dual system of UV and LED lamp curing machines. However, this is only one example, and the materials available for the dual system of UV and LED lamp curing machines can be selected through various choices and combinations.

That is, depending on the wavelengths used by the UV and LED lamp curing apparatuses, the photoinitiator according to the embodiment of the present invention may include, for example, a main initiator having a main absorption peak at 385 nm (UV lamp curing apparatus) And a side initiator having an absorption peak in a curing unit). The inclusion of two or more initiators in this manner allows the range of curing light sources to be broadened.

At this time, in the calculation of the absorption region of the initiator, the main peak does not change by Gaussian calculation, and the sub peak has a light absorption rate of 10% or more of the main peak in the long wavelength region, preferably 50% More preferably at least 70%.

8 is a graph showing the transmittance characteristics according to the wavelength of the cured black sealant.

At this time, FIG. 8 illustrates the transmittance characteristics according to the thickness of the black sealant (300, 570, 700, and 1100 μm), for example.

Referring to FIG. 8, the absorption wavelength range of the combined initiator used in the embodiment of the present invention is 330 nm to 450 nm, and the carbon black strongly absorbs the wavelength of the UV region. This is because, when UV is irradiated and curing is started, most of the carbon black absorbs UV light to be absorbed by the initiator, thereby lowering the reaction efficiency of the initiator and deteriorating the curability.

Accordingly, the curing wavelength of the LED lamp curing apparatus can be grasped and the initiator used in the black sealant can be optimized to the LED lamp curing apparatus through selection and combination of initiator types based on selection criteria. For example, An initiator with good curing efficiency and short tack time can be selected and combined.

Black sealant according to an embodiment of the present invention comprising such initiators For example, when having 4 or more in optical density of 500㎛ thickness can be cured in the curing of the energy of ^{900mJ / cm 2 ~ 1500mJ / cm} 2 LED lamp gyeonghwagi have.

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. As an example, titanium oxide particles can be used as the 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 .

Since the carbon black used as the colored particles 172a absorbs light in the visible light region, an excellent light leakage preventing effect can be obtained when the carbon black is used as the light blocking material 172. [ However, when carbon black is used as the light blocking material 172, UV curing of the base resin 171 may be difficult because the carbon black has a characteristic of absorbing not only the visible light region but also the UV region. However, in the case of the present invention, since the photoinitiator uses a combined photoinitiator which is cured not only in the UV but also in the LED lamp curing machine, even if the carbon black that absorbs light in the UV region is used as the light blocking material 172, 171 can be easily cured.

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 a 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 promoting material 173 may include light diffusion particles. That is, as shown in FIG. 4, when the light diffusion particles 173 'are included, the UV emitted upon UV curing can be diffused in the light diffusion particles 173' at various angles, A larger amount of UV can be irradiated to the resin 171, so that the curing of the base resin 171 can be facilitated.

The light-diffusing particles 173 'may be spherical or amorphous particles having a high refractive index of 1.5 or more. Particularly, the light diffusion particles 173 'are made of a material having a refractive index higher than that of the base resin 171 by 0.01 or more, preferably 0.05 or more. The light diffusion particles 173 'may be made of polystyrene (PS), polycarbonate (PC), or polyethylene terephthalate (PET), but are not limited thereto.

The particle size of the light diffusion particles 173 '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 UV irradiated for UV curing is increased, 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 UV can be improved in the wavelength range of about 400 nm, more specifically, in the wavelength range of 380 nm to 420 nm, so that the base resin 171 has more It is possible to obtain an effect that positive UV is irradiated.

9A and 9B are graphs showing transmittance characteristics depending on whether or not a blue pigment is added.

9B is an enlarged graph showing the transmittance characteristic of the portion A shown in FIG. 9A.

Referring to the above figures, the transmittance at 400 nm of the sample of the comparative example in which carbon black and blue pigment are removed and the sample of the experimental example including carbon black and blue pigment are compared with each other. As a result, by adding a blue series pigment, It can be seen that the large transmittance is improved.

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

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

FIGS. 10A and 10B are photographs showing the internal hardenability of the cured black sealant, respectively, showing samples of black sealants of 500 μm and 700 μm thickness, respectively.

Referring to the drawings, it can be confirmed that the black sealant having a thickness of 500 μm and 700 μm according to the embodiment of the present invention is cured by LED having a wavelength of 400 nm to 405 nm.

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.

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

11 illustrates a method of manufacturing a liquid crystal display device in which a liquid crystal layer is formed by a liquid crystal drop method. However, the present invention is not limited thereto. The present invention can be applied to a liquid crystal display device, 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 arranged in an array substrate and defining pixel regions are formed by an array process, and thin film transistors, which are driving elements connected to the gate lines and the data lines, are formed in each of the pixel regions (S110 ). 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, a color filter layer composed of red, green, and blue sub-color filters, which implement color by a color filter process, and a common electrode are formed on the color filter substrate (S120). 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 (S130, S140).

A sealant 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 (S150, S160).

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 the pressure is uniformly spread over the entire panel (S170).

By such a process, a large number of unit panels having a liquid crystal layer are formed on the first and second mother substrate, and the first and second mother substrates are cut and cut into a plurality of unit panels (S180 ).

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 S190).

For this, a combination of two types of photoinitiators selected to enable curing in an LED lamp curing machine as well as UV is selected according to the above description. The photoinitiator according to an embodiment of the present invention has a main absorption peak at an area of 400 nm or more, The branch may be made of a combination of a main initiator and a minor initiator having an absorption peak at 405 nm, for example in the region of longer wavelengths greater than 400 nm.

At this time, in the calculation of the absorption region of the initiator, the main peak does not change by Gaussian calculation, and the sub peak has a light absorption rate of 10% or more of the main peak in the long wavelength region, preferably 50% Should be combined to be more than 70% level.

A black sealant according to an embodiment of the present invention including such a photoinitiator is dispensed on the side of the panel and a shape is implemented through a pre-curing process (S190-1)

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 (S190-2, S190-3).

After completing the remaining cell processes, the respective panels are inspected to manufacture a liquid crystal display device (S200).

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
173 ': light diffusion particle

Claims (16)

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 light blocking material, and a curing promoting material,
Wherein the base resin comprises a photoinitiator in which a first photoinitiator having a main absorption peak in a first wavelength band and a second photoinitiator having an absorption peak in a second wavelength band different from the first wavelength band are mixed,
Wherein the curing accelerating material comprises a blue pigment. The display device of claim 1, further comprising a backlight unit installed on a rear surface of the panel to supply light to the panel. The display device according to claim 2, further comprising a cover bottom for fastening and fixing the panel and the backlight unit. The display device of claim 1, wherein the first photoinitiator and the second photoinitiator are reacted by light emitted from UV and LED lamp curing units, respectively. The display device of claim 1, wherein the base resin is made of an acrylate-based polymer. The display device of claim 5, wherein the acrylate-based polymer comprises at least one resin selected from an acrylate monomer and a UV curable acrylate system, and the first photo initiator and the second photo initiator. The display device of claim 6, wherein the first wavelength band is a wavelength band of 400 nm or less and the second wavelength band is a wavelength band of 400 nm or more. 7. The method according to claim 6, wherein, in the calculation of the absorption region of the initiators, by Gaussian calculation, the absorption peak of the first photoinitiator is unchanged, and the absorption peak of the second photoinitiator is the absorption peak of the first photoinitiator To 50% to 90%. The display device according to claim 1, wherein the light blocking material comprises colored particles. 10. The display device according to claim 9, wherein the colored particles include carbon black. The display device according to claim 9, wherein the light blocking material further comprises plate-shaped particles. The display device according to claim 11, wherein the plate-like particles are made of a metal oxide of aluminum oxide (Al ₂ O ₃ ). The display device according to claim 1, wherein the curing acceleration material comprises light diffusing particles. delete The display device according to claim 1, wherein the light leakage preventing member is in contact with a polarizing plate extending on both sides of the panel and attached to both sides of the panel. The display device according to claim 1, wherein the light leakage preventing member is in contact with a polarizing plate extending on both sides of the panel and attached to both sides of the panel.

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