KR20040032162A - Liquid crystal display device, apparatus and method for coating resins used to manufacture the same - Google Patents

Abstract

PURPOSE: A liquid crystal display, an apparatus and a method for coating a resin used for fabricating the liquid crystal display are provided to prevent particles from being introduced into a liquid crystal display panel and manufacture the liquid crystal display using an automated resin coater. CONSTITUTION: A liquid crystal display(1000) includes a liquid crystal display panel(100) for displaying pictures, a back light assembly(200) for providing light to the liquid crystal display, and frames for housing the liquid crystal display panel and the back light assembly. The frames include an upper mold frame(300), a low mold frame(500), a bottom chassis(600) and a top chassis(700). The face of the upper mold frame, on which the liquid crystal display panel is mounted, is coated with a resin(400) for blocking particles. The resin prevents the particles from being introduced between the upper mold frame and the liquid crystal display panel.

Description

Liquid crystal display device, resin coating apparatus and coating method used for manufacturing the same {LIQUID CRYSTAL DISPLAY DEVICE, APPARATUS AND METHOD FOR COATING RESINS USED TO MANUFACTURE THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, a resin coating device used in the manufacture thereof, and a coating method, and more particularly, a liquid crystal display device capable of preventing the inflow of foreign substances to the lower side of the liquid crystal display panel, and a resin used in the production thereof. A coating apparatus and a coating method are related.

1 is a partial perspective view illustrating a coupling relationship between a liquid crystal display panel and an upper mold frame in a general liquid crystal display device.

A general liquid crystal display device includes a liquid crystal display panel for largely displaying an image signal and displaying a screen, a backlight assembly for providing light to the liquid crystal display panel, and a storage container accommodating them.

The storage container may include an upper mold frame and a low mold frame to support the liquid crystal display panel and to accommodate the backlight assembly.

In other words, the low mold frame accommodates the backlight assembly, the upper mold frame is provided above the low mold frame, and an upper part of the upper mold frame supports and accommodates the liquid crystal display panel, and the upper mold The lower part of the frame presses and fixes the optical sheets of the backlight assembly to the low mold frame.

Referring to FIG. 1, the upper mold frame 30 and the upper mold frame which accommodates the liquid crystal display panel 20 and the liquid crystal display panel 20 by supporting edges of the liquid crystal display panel 20 ( 30 shows an optical sheet 60 provided below and providing the liquid crystal display panel 20 with uniform brightness.

The liquid crystal display panel 20 includes a thin film transistor substrate 21 having a thin film transistor (not shown), a color filter substrate 22 coupled to the thin film transistor substrate 21, and a liquid crystal encapsulated therebetween. (Not shown).

The upper mold frame 30 has a rectangular frame shape, and has a bottom surface 31a parallel to the thin film transistor substrate 21 of the liquid crystal display panel 20 and a bottom surface 31a inside the rectangular frame. A stepped portion 31 formed of sidewalls 31b perpendicular to the second side is formed, and the upper mold frame 30 accommodates the liquid crystal display panel 20 in the stepped portion 31.

The liquid crystal display panel 20 is mounted on the bottom surface 31a to be stably supported, and is spaced apart from the optical sheets 60 by a predetermined interval.

Foreign matter flows in between the thin film transistor substrate 21 and the bottom surface 31a on the bottom surface 31a to deteriorate the performance of the optical sheets 60 or the optical sheet 60 due to the foreign materials. In order to prevent the occurrence of defects in the adhesive liquid 40 and the silicone rubber tape (silicon rubber tape) 50 is attached.

The adhesive liquid 40 is applied onto the bottom surface 31a, the silicone rubber tape 50 is attached onto the adhesive liquid 40, and the liquid crystal display panel is formed on the silicone rubber tape 50. 20) Seat.

However, since the adhesive work of the adhesive liquid 40 and the silicone rubber tape 50 used as the foreign material blocking member is performed by hand, the productivity is low, and the quality thereof also varies depending on the worker.

In addition, in the process of attaching the adhesive liquid 40 and the silicone rubber tape 50, the adhesive liquid 40 may flow down to the outside of the bottom surface 31 a, that is, to the optical sheets 60. After the adhesive liquid 40 and the silicone rubber tape 50 are adhered to each other, the adhesive liquid 40 and the silicone rubber tape 50 may be separated from each other.

In addition, since the world-wide design trend follows a narrow bezel into which the size of the monitor looks small and the size of the screen is large, the width W1 of the bottom surface 31a of the upper mold frame 30 is obtained. ) Becomes small, and it becomes difficult to attach the adhesive liquid 40 and the silicone rubber tape 50 by hand on the bottom surface 31a thus reduced.

Accordingly, a first object of the present invention is to provide a liquid crystal display device capable of preventing the inflow of foreign substances to the lower side of the liquid crystal display panel.

A second object of the present invention is to provide an automated resin coating device used in the manufacture of the liquid crystal display device.

A third object of the present invention is to provide a resin coating method for use in the production of the liquid crystal display device using the resin coating device.

1 is a partial perspective view illustrating a coupling relationship between a liquid crystal display panel and an upper mold frame of a general liquid crystal display device.

2 is a cross-sectional view for describing a liquid crystal display device according to an exemplary embodiment of the present invention.

3 is a partial perspective view illustrating a coupling relationship between the liquid crystal display panel and the upper mold frame illustrated in FIG. 2.

4 is a view for explaining a step of applying a resin to the bottom surface of the upper mold frame shown in FIG. 2 using a resin coating device.

<Description of the symbols for the main parts of the drawings>

100: liquid crystal display panel 200: backlight assembly

230: lamp unit 240: light guide plate

250: optical sheet 260: reflector

300: upper mold frame 400: resin

500: low mold frame 600: bottom chassis

700: top chassis 800: resin coating device

The liquid crystal display device for achieving the first object of the present invention, the light generating unit for generating light, a liquid crystal display panel for receiving the light to display an image, parallel to the liquid crystal display panel and the liquid crystal display panel is seated The bottom surface and a side wall perpendicular to the bottom surface are provided on the bottom surface with an accommodating container for accommodating the liquid crystal display panel and adhesiveness to enhance adhesion to the bottom surface, and the liquid crystal display panel and the It includes a foreign matter blocking member for preventing the foreign matter from entering between the bottom surface.

The resin coating device for achieving the second object of the present invention, the foreign material blocking member is formed in order to prevent the foreign matter is inserted between the liquid crystal display panel of the liquid crystal display device and the seating surface of the storage container housing the liquid crystal display panel. A resin coating device comprising: a body having a predetermined resin embedded therein, and a lower side of the body, the injection port receiving the resin from the body and discharging the resin on the seating surface; It is characterized in that the resin is sprayed with a certain amount, and moved with a constant speed along the movement path of the seating surface to apply a resin having a uniform thickness on the seating surface below the movement path of the injection port.

The resin coating method for achieving the third object of the present invention, the foreign material blocking member is formed in order to prevent the foreign material is inserted between the liquid crystal display panel of the liquid crystal display device and the seating surface of the storage container housing the liquid crystal display panel. A resin coating method, comprising: arranging the storage container at a lower side of a resin coating apparatus including a body in which a predetermined resin is embedded and a nozzle connected to the body and receiving the resin from the body and discharging the resin to the outside; Applying a predetermined amount of the resin onto the seating surface through the nozzle, moving the resin coating device at a constant speed along the seating surface, and when the nozzle is returned to the starting point of the resin coating of the seating surface; And terminating the resin coating on the seating surface.

According to such a liquid crystal display device, a resin coating device and a coating method used for manufacturing the same, it is possible not only to prevent foreign matter from flowing between the liquid crystal display panel and the upper mold frame, but also to secure the reliability of the foreign material blocking member. In addition, it is possible to design a bezel (Narrow Bezel) into the application of the foreign matter blocking member by an automated facility.

Hereinafter, a liquid crystal display according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view for describing a liquid crystal display device according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the liquid crystal display device 1000 according to the exemplary embodiment of the present invention provides light to the liquid crystal display panel 100 and the liquid crystal display panel 100 for displaying a screen by applying an image signal largely. It consists of a backlight assembly 200 for receiving and receiving containers for storing them (300, 500, 600, 700).

The liquid crystal display panel 100 includes a thin film transistor (TFT) substrate 110 having a thin film transistor (not shown) and a plurality of color filters. It is made of a color filter substrate 120 provided with a color filter layer (not shown) made of a liquid crystal (not shown) enclosed therebetween.

In addition, the liquid crystal display panel 100 further includes first and second polarizing plates 130a and 130b on the outer sides of both substrates 110 and 120 of the liquid crystal display panel 100, respectively. The first and second polarizers 130a and 130b serve to change light incident to the first and second polarizers 130a and 130b to linearly polarized light, respectively.

Meanwhile, the backlight assembly 200 includes a lamp 210 generating light and a lamp reflector 220 surrounding the lamp 210 and reflecting a part of the light emitted from the lamp 210 to change the light path. And a light guide plate 240 for guiding light incident from the lamp unit 230 toward the liquid crystal display panel 100, and an upper side of the light guide plate 240. Reflector for reflecting light leaking from the light guide plate 240 to the liquid crystal display panel 100 provided at the lower side of the optical sheet 250 and the light guide plate 240 to uniform the brightness of the light toward the light guide plate ( 260).

The optical sheet 250 is a prism sheet for diffusing the light emitted from the light guide plate 240 to the front direction of the liquid crystal display panel 100 according to a refractive effect and the light emitted from the diffuser plate. It consists of a plurality of prism sheet for condensing by using a narrowing the viewing angle.

The storage container includes an upper mold frame 300, a low mold frame 500, a bottom chassis 600, and a top chassis 700.

The low mold frame 500 fixes the lamp unit 230, the light guide plate 240, and the reflecting plate 260 at a designated position, and fixes and stores the optical sheets 250 thereon.

Fixing protrusions 510 are formed on the row mold frame 500 to fix the optical sheets 250, and fixing holes are formed in the optical sheets 250 corresponding to the fixing protrusions 510. (Not shown in the drawing) is formed so that the fixing protrusion 510 and the fixing hole is fastened so that the optical sheet 250 is fixed to the low mold frame 500.

Meanwhile, the upper mold frame 300 is disposed on the row mold frame 500. A lower portion of the upper mold frame 300 presses the optical sheets 250 fixed to the low mold frame 500 toward the low mold frame 500, and an upper portion of the upper mold frame 300 is The liquid crystal display panel 100 is accommodated.

Resin 400 is coated on the surface of the upper mold frame 300 on which the liquid crystal display panel 100 is mounted as a foreign matter blocking member. Accordingly, the liquid crystal display panel 100 is seated on the resin 400, thereby eliminating the gap between the upper mold frame 300 and the liquid crystal display panel 100, and thus allowing the upper mold frame 300 and the liquid crystal to be removed. Foreign matter is prevented from entering into the display panel 100.

The bottom chassis 600 includes a bottom surface and sidewalls extending from the bottom surface, and accommodates the upper and low mold frames 300 and 500 in an inner space formed by the bottom chassis 600.

The top chassis 700 is provided on the liquid crystal display panel 100. The top chassis 700 has a cramped shape consisting of a top surface and sidewalls extending from an edge of the top surface. In this case, an upper surface of the top chassis 700 presses an edge of the liquid crystal display panel 100, and sidewalls of the top chassis 700 are coupled to sidewalls of the bottom chassis 600. As a result, the liquid crystal display 1000 is completed.

The upper mold frame 300 and the low mold frame 500 are separated from each other, but the upper mold frame and the low mold frame are integrally provided to accommodate the liquid crystal display panel 100, and the backlight assembly 200 It is obvious that the object of the present invention can faithfully fulfill the object of the present invention.

3 is a partial perspective view illustrating a coupling relationship between the liquid crystal display panel and the upper mold frame illustrated in FIG. 2.

Referring to FIG. 3, the liquid crystal display panel 100 is seated on the upper mold frame 300 to which the resin 400 is applied, and an optical sheet 250 is disposed below the upper mold frame 300. Is provided.

The upper mold frame 300 has a rectangular frame shape and is provided with a step 310 for accommodating the liquid crystal display panel 100 therein. The step 310 is formed inside a side wall of the upper mold frame 330 corresponding to an edge of the liquid crystal display 100, and is parallel to the thin film transistor substrate 110 of the liquid crystal display panel 100. A bottom surface 310a having a surface and a sidewall 310b perpendicular to the bottom surface 310a are formed.

The foreign material blocking member is formed on the bottom surface 310a of the upper mold frame 300 to prevent foreign substances from flowing between the thin film transistor substrate 110 of the liquid crystal display panel 100 and the bottom surface 310a. Resin 400 is provided.

The resin 400 is provided on the bottom surface 310a of the upper mold frame 300 corresponding to the edge of the liquid crystal display panel 100.

Although the present invention has been described with reference to a resin as a foreign material blocking member, it is preferable that the resin is cured from a liquid state having a high viscosity to have elasticity, and is provided on the bottom surface to provide the liquid crystal display panel and the upper mold frame. It is a material that can prevent the gap between.

As a result, the liquid crystal display panel 110 is seated on the bottom surface 310a and contacts the resin 310a, thereby forming a gap between the liquid crystal display panel 100 and the bottom surface 310a of the upper mold frame. To prevent foreign substances from flowing between the liquid crystal display panel 100 and the upper mold frame 300 to prevent defects in the optical sheet 250 provided under the upper mold frame 300. do.

In addition, by adjusting the coating thickness of the resin 310a, the gap between the liquid crystal display panel 100 and the optical sheets 250 is further separated from the liquid crystal display panel 100 and the optical sheets 250. The failure due to friction can be prevented.

4 is a view for explaining a step of applying a resin to the bottom surface of the upper mold frame shown in FIG. 2 using a resin coating device.

Referring to FIG. 4, the upper mold frame 300 and the resin coating device 800 for coating the resin 400 on the bottom surface 310a of the upper mold frame 300 are illustrated.

First, the resin coating device 800 will be described.

The resin coating device 800 is sprayed while moving a certain amount of resin at a constant speed by an automated facility. To this end, the resin coating device 800 includes a body (not shown) largely provided with a resin in a liquid state, and the injection port 810 for receiving a predetermined amount of liquid resin from the body and supplying it to the outside.

The injection hole 810 is connected to the body and the duct (not shown), and receives the resin from the body and ejects to the outside through the duct.

Therefore, the resin coating device 800 is an automated facility, and the resin coating device 800 moves at a constant speed and sprays a predetermined amount of resin, thereby applying the resin to the bottom surface 310a during the application process. It is possible to form a resin layer having a uniform thickness without breaking. As a result, the resin layer is cured to form a foreign material blocking member.

Hereinafter, the resin coating process will be described in more detail.

The upper mold frame 300 shown in FIG. 3 is provided. The bottom surface 310a of the upper mold frame 300 on which the liquid crystal display panel 100 is mounted should maintain a clean state from which foreign substances are removed.

Thereafter, the upper mold frame 300 is aligned to the lower side of the automated device for applying the resin, that is, the resin coating device 800. Therefore, the injection hole 810 of the resin coating device 800 is opposed to the bottom surface 310a of the upper mold frame 300.

After the alignment of the upper mold frame 300, a resin is applied onto the bottom surface 310a of the upper mold frame 300 from the injection port 810 of the resin coating device 800.

At this time, the resin coating device 800 moves with a constant speed along the movement path of the bottom surface 310a of the upper mold frame 300 already input. That is, since the upper mold frame 300 has four sidewalls 310b, the resin coating device 800 moves at a constant speed along the four sidewalls 310b and the upper mold frame 300. The resin is applied onto four bottom surfaces 310a of the substrate.

Since the resin is generally provided in a liquid state having a very high viscosity, the resin applied onto the four bottom surfaces 310a of the upper mold frame 300 is not broken in the middle of an application process.

The resin coating process is terminated when the resin coating device 800 returns to the position where the resin is applied on the bottom surface 310a through the injection hole 810. Thus, the resin is applied on the bottom surface 310a of the upper mold frame 300 on the bottom surface 310a of the upper mold frame 300.

The resin coating process is completed by curing after a predetermined time after the resin is applied on the bottom surface 310a.

Since the resin applied on the bottom surface 310a is applied by an automated device, it is formed on the bottom surface 310a with a uniform thickness.

In addition, even when the width W2 of the bottom surface 310a of the upper mold frame 300 is narrow, the width W3 of the injection hole 810 of the resin coating device 800 is determined by the bottom surface 310a. The coating process may be performed by adjusting the width W2. Therefore, even when designing a narrow bezel (Narrow Bezel), the application process can be easily performed by an automated facility.

The present invention is not only an edge type liquid crystal display device having a light guide plate and a lamp at an edge of the light guide plate, but also a direct type liquid crystal display device having a plurality of lamps and the plurality of lamps provided below the liquid crystal display panel. Is applied.

As described above, according to the present invention, the resin is applied manually on the bottom surface of the upper mold frame by using an automated resin coating device as a means for preventing foreign matter from entering between the upper mold frame and the liquid crystal display panel. The resin coating process can be performed more quickly and accurately than proceeding.

In addition, by directly applying the resin on the bottom surface, there is no need to use an adhesive, thereby simplifying the process and removing defects caused by the adhesive.

In addition, even when the liquid crystal display adopts a narrow bezel in accordance with global trends and the width of the bottom surface of the upper mold frame is small enough to be impossible manually, the width of the duct of the injection port in the resin coating device. If it is adjusted to the width of the bottom surface, even if the bezel (Narrow Bezel) design is adopted, the automated equipment can accurately apply the resin on the bottom surface.

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

Claims (6)

A light generating unit generating light; A liquid crystal display panel which receives the light and displays an image; A storage container configured to have a bottom surface parallel to the liquid crystal display panel and on which the liquid crystal display panel is seated, and a sidewall perpendicular to the bottom surface to accommodate the liquid crystal display panel; And It is provided on the bottom surface having an adhesive property to strengthen the adhesive force with the bottom surface, characterized in that it comprises a foreign matter blocking member for preventing foreign matter from flowing between the liquid crystal display panel and the bottom surface. Liquid crystal display. The method of claim 1, wherein the storage container, A first accommodating container accommodating the liquid crystal display panel; And And a second storage container for supporting the first storage container and accommodating the light generating unit therein. The liquid crystal display of claim 1, wherein the foreign material blocking member is formed by applying a silicone resin. In the resin coating device for forming a foreign matter blocking member in order to prevent the foreign matter is inserted between the liquid crystal display panel of the liquid crystal display device and the seating surface of the storage container housing the liquid crystal display panel, A body in which a predetermined resin is embedded; And It is provided on the lower side of the body, and receives the resin from the body and includes a jet port for discharging the resin on the seating surface, Injecting a predetermined amount of resin through the injection port, and moves with a constant speed along the movement path of the seating surface to apply a resin having a uniform thickness on the seating surface below the movement path of the injection hole Resin coating device to do. The resin coating device according to claim 4, wherein the resin is a silicone resin. In the resin coating method of forming a foreign matter blocking member in order to prevent the foreign matter is inserted between the liquid crystal display panel of the liquid crystal display device and the seating surface of the storage container housing the liquid crystal display panel, Arranging the storage container at a lower side of the resin coating apparatus including a body having a predetermined resin embedded therein and connected to the body and receiving the resin from the body and discharging the resin to the outside; Applying a predetermined amount of the resin onto the seating surface through the injection hole; Moving the resin coating device at a constant speed along the seating surface; And And terminating the resin coating on the seating surface when the injection port returns to the resin coating start point of the seating surface.