KR100667072B1 - Liquid Crystal Display and Method of fabricating thereof - Google Patents

Abstract

A liquid crystal display device and a method of manufacturing the same are provided. The apparatus and its manufacturing method include a bar covering an IC chip top of an LCD panel formed on the front of the module frame. IC chip of LCD panel can be prevented from being broken or damaged by impact. In addition, even if an external pressure is applied to the liquid crystal display, it provides an advantage of preventing distortion of the LCD panel.

LCD, Module Frame, PCB, FPCB

Description

Liquid crystal display and manufacturing method thereof

1A to 1C are perspective views illustrating a liquid crystal display and a manufacturing method thereof according to the prior art;

2A to 2D are perspective views illustrating a liquid crystal display and a manufacturing method thereof according to the present invention.

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

100, 200: backlight unit assembly 110, 210: reflector

120, 220: module frame 130, 230: light source

140, 240: Light guide plate 160, 260: Optical sheet

180, 280: LCD panel 181, 281: IC chip

190, 290: Printed Circuit Board (PCB)

225: Bar

The present invention relates to a liquid crystal display device and a method of manufacturing the same, and more particularly, to a liquid crystal display device and a method of manufacturing the bar that covers the upper part of the IC chip of the LCD panel formed on the front of the module frame.

Recently, a flat panel display having a merit of small size and light weight by solving problems of weight and size of a cathode ray tube (CRT) has been attracting attention. Such flat panel displays include Liquid Crystal Display (LCD), Organic Electro Luminescence Display (OELD), Field Emitter Display (FED) and Plasma Display (PDP). Panel).

Among such flat panel displays, LCD (Liquid Crystal Display) is an apparatus that changes the optical anisotropy by applying an electric field to the liquid crystal that combines the liquidity and the optical characteristics of the crystal, the power consumption compared to the conventional cathode ray tube (Cathode Ray Tube) It is low, easy to thin and short, large size and high resolution is widely used.

In general, the LCD module structure is largely composed of three units. That is, a driving circuit unit including an LCD panel in which liquid crystal is injected between two substrates, a driver LSI for driving the LCD panel, and a printed circuit board (PCB) attached with various circuit elements. And a back light unit assembly including a backlight.

1A to 1C are perspective views illustrating a liquid crystal display and a method of manufacturing the same according to the prior art, and FIG. 1A is a perspective view of components constituting the backlight unit assembly according to the prior art.

1A and 1B, the backlight unit assembly 100 includes a light source unit 130, a light guide plate 140, an optical sheet 160, a module frame 120, and a reflecting plate 110.

Looking at, the module frame 120 has an opening 126 is formed, the light source portion 130 and the light guide plate 140 is positioned in the opening 126 around the opening 126. The light source unit 130 may be attached to and driven by a flexible printed circuit (FPC) 150.

The optical sheet 160 is positioned on the light guide plate 140. The optical sheet 160 may interpose various optical sheets 160 such as a diffusion plate.

A liquid crystal display panel (hereinafter referred to as an LCD panel) 180 is fixed on the module frame 120 including the optical sheet 160.

In addition, the reflector 110 is interposed below the module frame 120. The reflective plate 110 may be attached by applying an adhesive material to a portion of the module frame 120 except for the opening 126 on the rear surface of the module frame 120.

Referring to FIG. 1C, a PCB 190 is connected to the LCD panel 180. The LCD panel 180 is controlled by the PCB 190.

As described above, the IC chip 181 of the LCD panel 180 is open in the related art. Therefore, when the liquid crystal display device is dropped, the LCD panel 180, in particular, the IC chip 181 may be broken or damaged by an impact. In addition, when an external pressure is applied to the liquid crystal display, a twist occurs and the LCD panel 180 may be damaged.

SUMMARY OF THE INVENTION The present invention has been made in an effort to solve the above-described problems of the prior art, and to provide a liquid crystal display device and a method of manufacturing the same, in which the IC chip of the LCD panel can be protected by torsion due to impact or external pressure. There is this.

In order to achieve the above technical problem, an aspect of the present invention provides a liquid crystal display device. The apparatus has an LCD panel. A backlight unit assembly is located under the LCD panel, and the backlight unit assembly includes a light source unit, a light guide plate, an optical sheet, and a bar covering the upper part of the IC chip of the LCD panel. A module frame and a reflecting plate formed with an opening are provided. It includes a printed circuit board (PCB) connected to the LCD panel. The bar may be formed to open and close. As a result, it is possible to prevent the IC chip of the LCD panel from being broken or damaged by an impact and to prevent twisting of the LCD panel even when an external pressure is applied to the liquid crystal display.

The display device may further include a bezel supporting the module frame and the LCD panel.

The backlight unit assembly may include a reflector plate, a module frame having an opening positioned on the reflector, a light source unit positioned on the reflector through an opening of the module frame, a light guide plate positioned at a side of the light source unit, and an optical member positioned on the light guide plate. It includes a sheet. The module frame may be made of a plastic material, and may use a light emitting diode (LED) or an EL element as the light source unit.

The PCB may be a flexible printed circuit board (hereinafter, referred to as an FPCB).

Another aspect of the present invention to achieve the above technical problem provides a method of manufacturing a liquid crystal display device. The manufacturing method includes providing a backlight unit assembly including a light source unit, a light guide plate, an optical film, and a front surface of which a bar covering an upper portion of the IC chip of the LCD panel is formed, and has a module frame and a reflecting plate having an opening. Fix the LCD panel on the module frame. Providing a PCB, and connecting the PCB with the LCD panel.

The bar formed module frame may be formed using a mold. In particular, when the module frame is a plastic material, an injection mold may be used. The bar may be formed to be opened and closed.

The fixing of the LCD panel on the module frame may include attaching an adhesive tape to the lower portion of the LCD panel and fixing it on the module frame. The adhesive tape may be one in which the area corresponding to the light emitting area of the LCD panel is transparent and the other area is black.

Providing the backlight unit assembly includes interposing the reflector below the module frame. The light guide plate is positioned on the light source part and the light source side on the reflection plate through the opening of the module frame. Positioning the optical sheet on the light guide plate.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings in order to describe the present invention in more detail. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like numbers refer to like elements throughout the specification.

2A to 2D are perspective views illustrating a liquid crystal display device and a manufacturing method thereof according to the present invention, FIG. 2A is a perspective view of components constituting the backlight unit assembly according to the present invention, and FIG. 2B is a module according to the present invention. Perspective view of the frame.

Referring to FIG. 2A, the backlight unit assembly 200 includes a light source unit 230, a light guide plate 240, an optical sheet 260, a module frame 220, and a reflector 210.

The backlight unit assembly 200 illustrated in the present invention relates to a backlight unit assembly that implements a field sequential (FS) -LCD in a liquid crystal display. In general, a TFT LCD uses a color filter to group three pixels that produce R, G, and B (red, green, and blue) to form one pixel, whereas the FS-LCD uses a single pixel as one pixel. It is characteristic. Accordingly, the FS-LCD has been evaluated as being suitable for realizing a video because it has excellent resolution and color reproducibility and a fast response speed.

Looking at the components constituting the backlight unit assembly 200 in detail, first, an opening 226 is formed in the module frame 220. The module frame 220 may be made of a plastic material.

A bar 225 covering the upper part of the IC chip of the LCD panel, which will be described later, is formed in a predetermined region of the front surface of the module frame 220. The bar 225 is formed to cover the upper portion of the IC chip of the LCD panel to be described later. When a shock is applied to the completed LCD module, since the IC chip portion of the LCD panel may be damaged, a bar 225 is formed to protect the portion.

 The module frame 220 in which the bar 225 is formed may be formed using a mold, and thus, the module frame 220 may be formed in advance through a precise mold process before assembling the LCD module. In particular, when the module frame is a plastic material, it is preferable to use an injection mold.

In this embodiment, it can be seen that both ends of the bar 225 are fixed to the module frame 220. In addition, the lower side of the module frame 220 is not blocked by the bar 225, so that the PCB and the LCD panel to be described later can be connected.

2B, another embodiment of a module frame 220 according to the present invention is shown. The bar 225 is formed in the module frame 220, and one end of both ends of the bar 225 is formed to be openable and open without being fixed to the module frame 220. A protrusion is formed in the module frame 220, and a hole is formed at one end of the bar 225 corresponding thereto, so that the protrusion formed in the bar 225 may be fixed to the protrusion.

Alternatively, both ends of the bar 225 are not fixed, and both ends of the bar 225 may be formed to be opened and closed.

Therefore, when assembling the backlight unit assembly 200 and the LCD panel, the assembly is performed while the bar 225 is bent up and opened, and after the assembly is completed, the LCD is closed by closing the bar 225 downward. The IC chip of the panel can be protected.

Referring again to FIG. 2A, the reflector 210 is interposed below the module frame 220. The reflective plate 210 may be attached by applying an adhesive material to a portion other than the opening 226 at the rear of the module frame 220. The reflector 210 serves to reflect the light generated from the light source 230 to the front of the light guide plate 240.

An opening 226 is formed in the module frame 220, and the light source unit 230 is positioned on the reflector 210 exposed through the opening 226. As the light source 230, a light emitting diode (LED) or an EL element can be used. As described above, since the FS-LCD uses a single pixel as one pixel, an LED chip or an EL element capable of emitting R, G, and B (red, green, and blue) can be used.

The light guide plate 240 is positioned at the side of the light source unit 230. The light guide plate 240 serves to guide the light generated from the light source 230 to the side. The light source unit 230 may be attached to and driven by the FPC 250.

The optical sheet 260 is positioned on the light guide plate 240. As the optical sheet 260, a diffusion plate or a brightness enhancement film (BEF) may be interposed.

The diffusion plate is an optical sheet for diffusing light generated from the light source unit 230, and the BEF is a transparent optical sheet for increasing the efficiency of the light source unit using the principle of reflection and refraction.

 Referring to FIG. 2C, the LCD panel 280 is fixed on the backlight unit assembly 200. That is, the LCD panel 280 is fixed on the module frame 220 including the optical sheet 260. After the lower portion of the LCD panel 280 is pushed into the bar 225 formed in the module frame 220, the upper portion of the LCD panel 280 is fixed to the module frame 220.

On the contrary, when the bar 225 is an openable type, the bar 225 may be assembled in an open state. That is, after fixing the LCD panel 280 on the module frame 220 including the optical sheet 260, the bar 225 is closed.

As described above, in the present invention, the IC chip 281 of the LCD panel 280 is protected by the bar 225. Therefore, even when an impact is applied to the liquid crystal display, the LCD panel 280, in particular, the IC chip 281 may be prevented from being broken or damaged by the impact. In addition, even when an external pressure is applied to the liquid crystal display, torsion may be prevented from occurring, thereby preventing damage to the LCD panel 280.

In this case, an adhesive tape may be attached to the lower portion of the LCD panel 280, and the LCD panel 280 may be fixed on the module frame 220. In the adhesive tape, an area corresponding to a light emitting area of the LCD panel 290 is transparent, and other areas are preferably black. Therefore, light emitted from the light source 230 may be prevented from leaking to the outside.

A bezel (not shown) for supporting the module frame 220 and the LCD panel 280 may be formed. The bezel may be formed below the module frame 220 including the reflector 210, or may be formed on the bottom and side surfaces thereof. Therefore, the LCD panel 280 can be more firmly fixed. The bezel may be formed using a metal material such as aluminum or an aluminum alloy.

Referring to FIG. 2D, a PCB 290 is connected to the LCD panel 280. The PCB 290 is a circuit board for controlling the LCD panel 280, and may use a PCB in the form of a rigid board, or may use a flexible printed circuit board (FPCB).

As described above, the PCB 290 may be connected to the LCD panel 280 after the LCD panel 280 is fixed on the module frame 220. Alternatively, the PCB 290 may be connected to the LCD. After connecting to the panel 280, the LCD panel 280 may be fixed on the module frame 220. This completes the liquid crystal display device.

According to the present invention as described above, by forming a bar covering the upper part of the IC chip of the LCD panel on the front of the module frame, it is possible to prevent the IC chip of the LCD panel from being broken or damaged by the impact. In addition, even if an external pressure is applied to the liquid crystal display, it provides an advantage of preventing distortion of the LCD panel.

While the foregoing has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

Claims (16)

A liquid crystal display (LCD) panel; A module frame positioned below the LCD panel, having a reflection plate, a bar disposed on the reflection plate, and covering an upper part of the IC chip of the LCD panel, the module frame having an opening, and positioned on the reflection plate through the opening of the module frame; A back light unit assembly including a light source unit, a light guide plate positioned on a side of the light source unit, and an optical sheet positioned on the light guide plate; And And a printed circuit board (PCB) connected to the LCD panel. The method of claim 1, And the bar is formed to be opened and closed. delete The method of claim 1, And a bezel supporting the module frame and the LCD panel. The method of claim 1, The PCB is a liquid crystal display device, characterized in that the flexible printed circuit board (FPCB). The method of claim 1, The module frame is a liquid crystal display, characterized in that made of a plastic material. The method of claim 1, The light source unit includes a light emitting diode (LED) or an electro luminescence (EL) element. A reflector plate, a bar disposed on the reflector plate and covering an upper portion of the IC chip of the LCD panel, the module frame having an opening, a light source unit positioned on the reflector through the opening of the module frame, and positioned on the light source side Providing a backlight unit assembly including a light guide plate and an optical sheet positioned on the light guide plate; Fix the LCD panel onto the module frame, And providing a printed circuit board (PCB) and connecting the PCB to the LCD panel. The method of claim 8, Providing the backlight unit assembly The reflective plate is interposed below the module frame, Positioning a light guide plate on the light source portion and on the side of the light source portion on the reflecting plate through the opening of the module frame; And arranging an optical sheet on the light guide plate. The method of claim 8, And the module frame on which the bar is formed is formed using a mold. The method of claim 8, The bar is a manufacturing method of the liquid crystal display device, characterized in that formed to be opened and closed. The method of claim 8, Fixing the LCD panel on the module frame Attaching an adhesive tape to the lower portion of the LCD panel and fixing the LCD panel on the module frame. The method of claim 12, The adhesive tape is And an area corresponding to the light emitting area of the LCD panel is transparent, and other areas are black. The method of claim 8, After fixing the LCD panel on the module frame, The method of manufacturing a liquid crystal display device further comprising supporting the module frame and the LCD panel using a bezel. The method of claim 8, The PCB is a method of manufacturing a liquid crystal display device, characterized in that the flexible printed circuit board (FPCB). The method of claim 8, And the light source unit comprises an LED or an EL element.

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