KR101225902B1 - Front protect panel unified front framework of display and tv containong the same - Google Patents

Abstract

The present invention relates to a front protective panel formed integrally with the front edge of a display and a TV including the same. A 100 wt. Parts polymer blend, 2 to 10 parts by weight of a fluidizing agent is added, and the polymer blend is a polycarbonate resin. Mounted on the front of displays such as PDP TVs, LCD TVs, Borderless TVs, and 3D TVs by using an injection resin composition composed of 80 to 90% by weight and 10 to 20% by weight of a polymer resin having negative birefringence. The present invention relates to an optical panel made of a low birefringent polymer blended plastic resin, which provides an integrated cabinet for cabinets, thereby improving the appearance and reducing the thickness of a TV.

Description

FRONT PROTECT PANEL UNIFIED FRONT FRAMEWORK OF DISPLAY AND TV CONTAINONG THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front protective panel integrally formed with the front edge of a display and a TV including the same, and is mounted on the front of a display such as a PDP TV, an LCD TV, a borderless TV, and a 3D TV, and has a low birefringence. An optical panel made of a polymer blended plastic resin and a technique for manufacturing a cabinet protecting a liquid crystal module as an integrated body.

In general, a display device such as an LCD TV includes a front cabinet and a rear cabinet in the form of an external case for protecting an image output panel.

At this time, the front cabinet includes an edge called a bezel. The cabinet includes an opening corresponding to the size of the image output panel at the center thereof.

Next, an image output panel is coupled to the opening, and a panel made of glass is mounted on the front surface to protect the image output panel.

On the other hand, in recent years, a borderless type has been applied to remove the front edge in accordance with the trend of improving the appearance of the display device.

However, in the case of the borderless type front glass panel, it is difficult to form the glass, and the adhesive property with the cabinet is poor, so that its application is not easy.

In addition, the use of the front panel is also increasing in 3D displays. In the case of 3D TVs, in particular, 3D glasses such as polarized glasses or shutter glass should be used. There is a problem that can not watch a clear screen is increased.

The present invention is to manufacture a display panel for minimizing birefringence, using a resin composition for injection compression molding mixed with a high-molecular polymer blend optical compensation additive or coupling agent, by using the same is manufactured integrally with the cabinet It is an object of the present invention to provide an integrated front protective panel which forms a front panel, thereby reducing the manufacturing cost, reducing the overall product thickness, and the like.

In addition, the present invention is produced by the injection compression molding method using the above composition, the birefringence is minimized, can be easily applied to a borderless display device, it is possible to obtain the same image quality as the glass panel Its purpose is to provide a TV.

Cabinet integrated front protection panel according to an embodiment of the present invention is a front protection panel for protecting the liquid crystal module of the display, using a transparent resin composition of the outer casing portion of the outer case of the liquid crystal module and integral injection structure Characterized in that formed.

Here, the cabinet integrated front protection panel includes a screw coupling portion formed in the edge portion for coupling with the rear cabinet of the outer case portion, the frame portion formed integrally characterized in that the side thickness is 0.1 ~ 30mm thick. The thickness of the front protective panel is characterized in that 3 ~ 10mm.

Next, the transparent resin composition is 2 to 10 parts by weight of a fluidizing agent is added to 100 parts by weight of the polymer blend, the polymer blend is 80 to 90% by weight of a polycarbonate resin and a polymer resin having a negative birefringence 10 ~ It is characterized by consisting of 20% by weight.

In this case, the polycarbonate resin is characterized in that consisting of bisphenol A, the polycarbonate resin is trimethyl-cycloheqd-bisphenol-A having a trimethylcyclohexyl group, 3,3,3 ', 3'-tetra And copolymerized with at least one of methyl-1 (3,3,3 ', 3'-tetramethyl-1), l-spiro-biindane and fluorene-bisphenol-A.

In addition, it is preferable to use the melt index (MI) of the polycarbonate is 50 ~ 60g / 10 minutes, 300 ℃.

Next, the negative birefringence polymer resin is characterized in that it comprises at least one of polystyrene (PS) and dicyclopentadiene (DCPD) polymer, the molecular weight of the polystyrene (PS) is 150,000 ~ 200,000 It is characterized by.

In addition, the negative birefringent polymer resin further comprises at least one of polymethyl methacrylate (PMMA) and polycarbonate (PC) made of bisphenol having a fluorene structure. .

Next, the fluidizing agent is characterized in that the low molecular weight of the molecular weight of 1,000 ~ 10,000, the low molecular weight is characterized in that it has a negative birefringence.

Next, the transparent resin composition further comprises an optical compensation additive and a coupling agent (Coupling agent), the optical compensation additive is characterized in that the crystal (needle) or rod (rod) form , The optical compensation additive is SrCO ₃ characterized in that.

Next, the optical compensation additive is added to 0.5 parts by weight or less based on 100 parts by weight of the polymer blend.

At this time, the coupling agent is characterized in that the coupling agent of Ti series.

In addition, the TV according to an embodiment of the present invention is a cabinet integrated front protection panel, the liquid crystal module mounted on the inner side of the front protection panel and the rear of the liquid crystal module to protect the rear, combined with the cabinet integrated front protection panel It characterized in that it comprises a cabinet.

In this case, the TV is any one of an LCD TV, a PDP TV, a borderless TV and a 3D TV.

By using the injection molding composition according to the present invention, it is possible to easily produce a panel having a low birefringence and high transmittance. In addition, injection molding may be integrated with a cabinet that protects the liquid crystal module including the image output panel.

Therefore, the present invention can reduce the manufacturing cost of the display device, and provides an effect that can be easily expanded its utilization.

In addition, the front panel for a TV manufactured using the composition according to the present invention, while providing a low birefringence and high strength, such as glass, easy to form and light weight, LCD TV, PDP TV, borderless It can be easily applied to any of the boardless TVs and 3D TVs, and provides the effect of easily extending the usability.

1 is an exploded perspective view showing a TV display device to which the integrated front protection panel according to an embodiment of the present invention is applied.
2 and 3 are perspective views illustrating a front protection panel according to other embodiments of the present invention.

Hereinafter, a front protection panel integrally formed with a front edge of a display according to the present invention and a TV including the same will be described in detail with reference to the accompanying drawings.

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.

1 is an exploded perspective view showing a TV display device to which the integrated front protection panel according to an embodiment of the present invention is applied.

Referring to FIG. 1, a cabinet-integrated front protection panel 100 is coupled to a front surface of the liquid crystal module 120, and a rear cabinet 130 including a display pedestal or a cradle is coupled to the rear surface.

In this case, the display device of the present invention as described above representatively shows a general LCD TV structure, it can be applied to both LED TV including the LED backlight, 3D TV and PDP devices including the 3D display liquid crystal module.

In this case, the front cabinet and the rear cabinet are combined first, and the product is manufactured in such a manner that the glass panel is bonded to the bezel area of the front cabinet.

However, such a conventional case has a lot of problems, such as the weight of the glass panel is heavy to increase the bezel portion area for adhesion, or it is not easy to mold the glass panel to the bezel portion.

In addition, in the case of the existing 3D TV has a birefringence on the front panel, which is an injection molding, there are problems in which two images are seen, or a three-dimensional feeling is degraded, causing dizziness.

Therefore, the front panel had to be used as glass, but the glass panel had the same problem as described above, and thus its application was not easy.

In order to solve this problem, the present invention intends to develop a panel that can be easily applied to a borderless TV or a 3D TV using a resin composition without being constrained by conditions such as a molding method or a processing time.

In this case, in the case of a conventional injection product, since birefringence occurs due to residual stress and orientation during injection, injection compression molding method using polycarbonate (PC) and polymethyl methacrylate (PMMA) to minimize birefringence. Was applied, and the method of proceeding as slowly as possible was used.

Therefore, in this invention, by developing the resin composition which has a birefringence low enough to replace a glass panel, it was made easy to carry out injection molding of a front protection panel.

In addition, by further injection molding to be integrated with the edge of the front cabinet, it is possible to minimize the bezel area, thereby enabling a true borderless (Boarderless) form can be completed.

Therefore, the birefringence of the resin composition according to the present invention will be described in more detail as follows.

In the following, in particular, the components of the resin composition for injection according to the present invention and their addition ranges will be described in detail.

First, the resin composition for injection according to the present invention is added 2 to 10 parts by weight of a fluidizing agent based on 100 parts by weight of the polymer blend. At this time, it is preferable that the polymer blend is made of 80 to 90% by weight of polycarbonate resin and 10 to 20% by weight of polymer resin having negative birefringence.

The principle of the composition combination of the present invention as described above is a method of reducing birefringence from the resin composition raw material step, rather than a processing step, by mixing compositions having opposite birefringence of positive and negative signs, mutual birefringence To offset.

Here, the birefringence positive / negative is determined by the difference between the polarization rate in the polymer main chain direction and the polarization rate in the polymer side chain direction. For example, a polycarbonate resin made of bisphenol A in which the polarization rate in the polymer main chain direction is larger than the polarization rate in the polymer side chain direction becomes a positive birefringence, and a poly made of bisphenol having a fluorene structure in which the polarization rate in the polymer side chain direction is increased. The carbonate resin becomes negative birefringent.

Accordingly, the present invention provides an injection resin composition which minimizes birefringence by using a fluidizing agent, an optical compensation additive, or the like in a polymer blend resin in which the composition ratio of a material composition having such birefringence is adjusted.

Polycarbonate

As described above, the polycarbonate resin may be formed of bisphenol A having a positive birefringence, but having a trimethylcyclohexyl group (trimethyl-cycloheqd-bisphenol-A), 3,3,3 ', 3' Copolymers with one or more of -tetramethyl-1 (3,3,3 ', 3'-tetramethyl-1), l-spiro-biindane, and fluorene-bisphenol-A.

In addition, it is preferable to use the melt index (MI) of polycarbonate which is 50-60 g / 10min at 300 degreeC.

As such, the polycarbonate of the present invention having the above-described characteristics is preferably added within the range of 80 to 90 wt% in the polymer blend resin.

If the content of polycarbonate is less than 80% by weight, the desired strength cannot be obtained as the front panel.

On the contrary, when the content of the polycarbonate exceeds 90% by weight, the positive birefringence may be excessively strong, and a process of canceling the birefringence may not be normally performed using a resin composition having negative birefringence.

In addition, when the melt index of the polycarbonate is less than 50g / 10min at 300 ° C, fluidity is inferior, and birefringence is too large due to residual stress and orientation during injection, so that birefringence remains large even when injection compression molding is performed.

On the contrary, the limit value of the melt index of polycarbonate is not particularly limited, but an injection molding product having excellent strength and impact resistance and low birefringence in a range of 60 g / 10 min and 300 ° C. or less can be obtained.

Polymer resin with negative birefringence

Next, the negative birefringence polymer resin is preferably used a polymer resin containing at least one of polystyrene (PS) and dicyclopentadiene (DCPD) polymer.

In this case, in the case of polystyrene (PS), the molecular weight thereof is preferably used in a range of 150,000 to 200,000, and the molecular weight range is applicable to the entire polymer resin having negative birefringence.

In addition, the negative birefringence polymer resin preferably includes a resin further comprising at least one of polymethyl methacrylate (PMMA) and polycarbonate (PC) made of bisphenol having a fluorene structure.

It is preferable to add the polymer resin which has the negative birefringence which has the above characteristic in 10 to 20weight% of a range.

When the content range of the polymer resin having a negative birefringence is less than 10% by weight, or if the molecular weight is less than 150,000, the action of canceling the positive birefringence of the polycarbonate may be insufficient. And this can be applied within the limits of compatibility.

On the contrary, when the content range of the polymer resin having negative birefringence exceeds 20% by weight or the molecular weight range exceeds 200,000, the negative birefringence may be reversed, resulting in an increase in the birefringence of the injection molding. In some cases, the compatibility may be deteriorated, and thus may not be applicable to the optical.

Fluidizing agent

Next, the fluidizing agent uses a low molecular weight of 1,000 to 10,000 molecular weight, the low molecular weight is preferably used having a negative birefringence.

In this case, when the molecular weight of the low molecular weight is less than 1,000, the fluidity may be lowered to increase the birefringence of the injection molding.

On the contrary, when the molecular weight of the low molecular weight exceeds 10,000, the fluidity is excessively increased, and injection compression molding may not be normally performed.

Optical Compensation Additives and Coupling Agents

Next, an optical compensation additive and a coupling agent may be further added to the resin composition according to the present invention.

Here, the optical compensation additive is preferably used in the form of a needle (needle) or rod (rod) crystal, it is preferable to use SrCO ₃ as an example.

At this time, the optical compensation additive is preferably added to 0.5 parts by weight or less based on 100 parts by weight of the polymer blend.

When the range of addition of the optical compensation additive exceeds 0.5 parts by weight based on 100 parts by weight of the polymer blend, the birefringence of the extrudate may be increased, so it is preferable to limit the addition range.

Next, it is preferable to use a coupling agent of Ti series.

Coupling agent of Ti series (titanate) increases the adhesion between the interface of the inorganic filler and the interface of the polymer has the effect of improving the binding force and dispersibility with the polymer matrix (matrix).

In this way, the increase in dispersibility and the decrease in viscosity may have an effect of reducing residual stress during injection, and may enable high filling to improve moldability.

Injection molding method

In one embodiment according to the present invention compounding the polycarbonate resin and polystyrene resin (compounding) first, and compounding (second) compounding (compounding) by adding SrCO ₃ or a fluidizing agent based on the resin to prepare a resin (pellets) It was.

Here, using the pelletized resin, it is possible to complete the panel production by molding the injection molded product in the form of a film by using a twin screw extruder.

Next, using the resin composition for injection according to the present invention described above, to produce an injection molded product and look at its birefringence characteristics are as follows.

2 and 3 are perspective views illustrating a front protection panel according to embodiments of the present invention.

Figure 2 shows an embodiment in which the front protective panel according to the present invention is formed by integrally injection molding the rim which becomes the bezel area on the rear (back side) of the panel, and Figure 3 shows the overall display by minimizing the thickness of the rim. One embodiment is shown to reduce the thickness of the device.

First, referring to FIG. 2, an integral front protective panel 100 injection molded in a form in which the front cabinet 110 is coupled to an inner edge portion of the front panel 150 may be seen.

In this case, since the existing front panel adhesive area that becomes the bezel area is minimized, the front cabinet 110 may be formed to be almost similar to the size of the liquid crystal module.

In addition, by further forming a screw coupling portion 160 to facilitate the coupling with the rear cabinet 130 in the front cabinet 110, so that the defect of the outer case for protecting the liquid crystal module 120 can be made more easily. can do.

Therefore, the volumetric increase is minimized, and a slimmer and beautifully shaped product can be completed.

Here, the thickness of the front panel 150 is preferably formed to 3 ~ 10mm by the injection compression molding method.

When the thickness of the panel is less than 3mm, desired strength characteristics cannot be obtained as the front panel, and when the thickness of the panel exceeds 10mm, the birefringence may be increased.

In addition, it is preferable to form the side thickness (H ₁ ) of the front cabinet 110 to be the edge portion is 0.1 ~ 30mm.

FIG. 2 illustrates a case in which the side thickness H ₁ of the front cabinet 110 secures a predetermined thickness or more. When the thickness exceeds 30 mm, the cabinet is unnecessarily thick, and the injection process efficiency may be reduced. In addition, the thickness of the entire product can also be increased.

In addition, FIG. 3 illustrates a case in which the side thickness H2 of the front cabinet 210 is almost absent. In this case, when the side thickness of the front cabinet 210 is less than 0.1 mm, the front panel 250 and Since the rear cabinet is directly coupled, the front panel and the cabinet may not be accurately aligned, and the bonding process may not be easily controlled, and thus the product manufacturing may be inefficient.

Therefore, in the present invention, by forming an integrally combined edge portion of the front cabinet for protecting the liquid crystal module on the front panel, it is possible to facilitate the manufacture of the display device.

As described above, by using the injection composition according to the present invention, it is possible to easily manufacture a panel having a low birefringence and a high permeability, to reduce the manufacturing cost, and to easily expand its utility. Can be.

In addition, using the composition according to the present invention, while providing a low birefringence and high strength, such as glass, its molding is easy and the weight of the injection molding can be reduced, LCD TV, PDP TV, Borderless (Boarderless) It is easily applicable to any one of a TV and a 3D TV.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. These changes and modifications may be made without departing from the scope of the present invention. Accordingly, the scope of the present invention should be determined by the following claims.

100, 200: integrated front protection panel
110, 210: front cabinet 120: liquid crystal module
130: rear cabinet 150, 250: front panel
160: screw connection

Claims (20)

Front protection panel to protect the LCD module of the display,
The transparent resin composition is formed as an integral injection structure with the edge of the front cabinet of the outer case portion of the liquid crystal module,
The transparent resin composition
2 to 10 parts by weight of a fluidizing agent is added to 100 parts by weight of the polymer blend, and the polymer blend is made of 80 to 90% by weight of a polycarbonate resin and 10 to 20% by weight of a polymer resin having negative birefringence. Cabinet integrated front protection panel.
The method of claim 1,
The cabinet integrated front protection panel
Cabinet-integrated front protection panel comprising a screw coupling portion formed in the edge portion for coupling with the rear cabinet of the outer case portion.
The method of claim 1,
The frame portion formed integrally
Cabinet-integrated front protective panel, characterized in that the thickness of the side thickness of 0.1 ~ 30mm.
The method of claim 1,
The thickness of the front protection panel
Cabinet-integrated front protective panel, characterized in that 3 ~ 10mm.
delete The method of claim 1,
The polycarbonate resin is
Cabinet-integrated front protective panel comprising bisphenol A.
The method of claim 1,
The polycarbonate resin is
Trimethyl-cycloheqd-bisphenol-A, 3,3,3 ', 3'-tetramethyl-1 (3,3,3', 3'-tetramethyl-1), l- with a trimethylcyclohexyl group Cabinet-integrated front protective panel characterized in that copolymerized with at least one of spiro-biindane and fluorene-bisphenol-A.
The method of claim 1,
Melt index (MI) of the polycarbonate is
Cabinet-integrated front protective panel, characterized in that 50 ~ 60g / 10 minutes, 300 ℃.
The method of claim 1,
The polymer resin having negative birefringence is
A cabinet integrated front protective panel comprising at least one of polystyrene (PS) and dicyclopentadiene (DCPD) polymers.
10. The method of claim 9,
The molecular weight of the polystyrene (PS) is
Cabinet integrated front protection panel, characterized in that 150,000 ~ 200,000.
10. The method of claim 9,
The polymer resin having negative birefringence is
A cabinet integrated front protective panel further comprising at least one of polymethyl methacrylate (PMMA) and polycarbonate (PC) made of bisphenol having a fluorene structure.
The method of claim 1,
The glidant is
Cabinet-integrated front protective panel, characterized in that the low molecular weight of 1,000 to 10,000 molecular weight.
The method of claim 12,
The low molecular weight is
Cabinet-integrated front protective panel characterized by having a negative birefringence.
The method of claim 1,
The transparent resin composition
An integrated cabinet protection front panel further comprising an optical compensation additive and a coupling agent.
15. The method of claim 14,
The optical compensation additive
Cabinet-integrated front protective panel, characterized in that the crystal in the form of needles or rods.
15. The method of claim 14,
The optical compensation additive
Cabinet integrated front protective panel, characterized in that SrCO ₃ .
15. The method of claim 14,
The optical compensation additive
Cabinet integrated front protection panel, characterized in that added to less than 0.5 parts by weight based on 100 parts by weight of the polymer blend.
15. The method of claim 14,
The coupling agent
Cabinet-integrated front protective panel, characterized in that the Ti series coupling agent.
19. A cabinet integrated front protective panel according to any one of claims 1 to 4 and 6 to 18;
A liquid crystal module mounted inside the front protection panel; And
And a rear cabinet which protects a rear surface of the liquid crystal module and is coupled to the cabinet integrated front protective panel.
20. The method of claim 19,
The TV is
An LCD TV, a PDP TV, a borderless TV, or a 3D TV.

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