KR20040089838A - Liquid Crystal Display Device and Method for Manufacturing thereof - Google Patents

Abstract

PURPOSE: An LCD(Liquid Crystal Display) and a fabricating method thereof are provided to improve a fabricating process of an LCM(Liquid Crystal Module) and improve the productivity of the LCM by forming insertion devices on a rear surface of a support main by one body. CONSTITUTION: A support main accepts an LCD panel(11) and a backlight part. The LCD panel displays an image. The backlight part supplies uniform light to the LCD panel. PCBs(40a,40b) are electrically connected with the LCD panel, and are installed under the support main. Insertion devices(50,51) are formed on a rear surface of the support main, and the PCBs are inserted into the insertion devices(50,51).

Description

Liquid crystal display device and method for manufacturing thereof

The present invention relates to a liquid crystal display device, and more particularly, to a means for protecting a printed circuit board of the liquid crystal display device.

Recently, the liquid crystal display (LCD) has been characterized by light weight, thinness, low power consumption, and the like, and the quality of the liquid crystal material has been rapidly improved by the improvement of the liquid crystal material and the development of micro pixel processing technology. The trend is widening. For example, the liquid crystal display device is employed as a display device of a notebook computer (NoTebook Personal Computer (hereinafter referred to as "NTPC")). These NTPCs are slimmer and lighter so that users can use the information between mobiles. As a core component of the liquid crystal display device as described above, a liquid crystal display module (hereinafter referred to as "LCM"), which is a flat panel display device including a backlight unit and a liquid crystal display panel, will be described.

1 is a detailed exploded view of a general LCM 10.

As shown in FIG. 1, the LCM 10 may be divided into a backlight unit 12 and a liquid crystal display panel 11, and the backlight unit 12 and the liquid crystal display panel 11 may include a support main 13 and a top. It is supported by the case 20. Reflector plate 12a, light guide plate 12b, diffusion or protection sheet 12c, first prism sheet 12d, second prism sheet 12e and diffusion or protection sheet as a back light portion on support main 13 made of plastic 12f and the liquid crystal display panel 11 are laminated | stacked one by one. Meanwhile, the upper case 20 of the metal material is coupled to the upper side of the liquid crystal display panel 11 and supported by the support main 13 at the lower portion thereof. In addition, one side of the support main is provided with a lamp 25 for emitting light.

In general, printed circuit boards 40a and 40b (hereinafter, referred to as “PCB”) are installed below the support main 13. In the PCBs 40a and 40b, a drive integrated circuit (hereinafter referred to as "D-IC") for driving switch elements (ie, TFT array) of the liquid crystal display panel 11 is mounted. . In addition, the PCBs 40a and 40b are electrically connected to the liquid crystal display panel 11 by TCPs 41a and 41b (Tape Carrier Package (hereinafter referred to as “TCP”)) to control and video signals of the D-ICs. To be delivered to the LCM 10.

FIG. 2 is a rear view of the LCM 11, and the cover shields 30 and 31 are mounted to protect the PCBs 40a and 40b installed on the rear surface of the support main 13 according to the related art. to be.

In the process of assembling the LCM 10, a liquid crystal display panel having PCBs 40a and 40b attached thereto is mounted on the support main 13, and then the PCBs 40a and 40b are connected to the liquid crystal display panel 11. Since the TCPs 41a and 41b are gently folded around the lower edge of the support main 13, the PCBs 40a and 40b are installed below the support main 13. Here, since the PCBs 40a and 40b on which the electrical circuits for driving the switch elements of the liquid crystal display panel are mounted are easily damaged by an external impact, a means for protecting the PCBs 40a and 40b is required. Accordingly, cover shields 30 and 31 are provided as protective covers along the lower surfaces of the PCBs 40a and 40b installed below the support main 13. The PCB is divided into a source PCB 40a mounted along the long side direction of the LCM 10 and a gate PCB 40b mounted along the short side direction. The cover shield 30 corresponds to the source PCB cover shield 30. And a cover shield 31 for the gate PCB, and are provided corresponding to the shape of each PCB.

As shown in FIG. 2, according to the related art, the cover shields 30 and 31 are made of a thin plate or film using stainless steel (SUS) or PET (PolyEthylene Terephthalate) as independent components. In addition, when PET is used as the material of the cover shields 30 and 31, the cover shields 30 and 31 are half-cut on one side of the cover so that the cover shields 30 and 31 can be easily folded to cover the side portions of the LCM 10. Half cutting lines are formed. One end of the cover shield (30, 31) is protected by covering the PCB (40a, 40b), the other end folded along the half cutting line covers the side of the LCM (10). Thereafter, the cover shields 30 and 31 are attached to the rear surface of the support main 13 using double-sided tape or the like.

In general, according to the side mounting method for mounting the LCM (10) in the system, a screw fastening hole (not shown) is formed on the side of the LCM (10), by fastening the screw to the side when fastening with the system The LCM 10 is fixed to the system case or the like. Therefore, a plurality of holes 30a and 31a are formed in the cover shields 30 and 31 to cover the side portions, respectively, corresponding to the screw fastening holes of the LCM 10 and formed in the cover shields 30 and 31. The cover shields 30 and 31 should be attached to the holes 30a and 31a and the screw fastening holes formed on the sides of the LCM 10 to coincide with each other.

According to the prior art as described above has the following problems.

First, the cover shield according to the related art is an independent component, and the manufacturing process of the cover shield is required separately, and an attaching process is required to protect the PCB, which complicates the manufacturing process of the LCM, and performs the attaching process. There is a problem in that the productivity of the LCM is lowered because of the time required for the reattachment operation, etc. occurs.

Second, when PET is used as the material of the cover shield, there is a problem of frequently tearing or breaking along the half cutting line during the packaging or assembly process of the LCM.

Third, when covering the side of the LCM by folding the cover shield along the half cutting line, there was a problem of covering the screw hole for the side mounting fastening formed on the side of the LCM by the assembly tolerance.

Fourth, due to the elasticity of the TCP connecting the PCB, the PCB is not stably installed on the back of the support main, so that the PCB is damaged when bumped against an external object or severe vibration is applied during the assembly process.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a liquid crystal display device having a PCB protection means for more stable and improved productivity.

1 is an exploded perspective view of a typical liquid crystal display module (LCM).

2 is a view of a structure for covering a printed circuit board with a cover shield according to the prior art.

Figure 3 is a back and side view of the support main showing that the insertion fixing device of the present invention is formed.

Figure 4 is a perspective view of a structure for inserting a printed circuit board in the fixing device for insertion of the present invention.

<Description of Symbols for Major Parts of Drawings>

10: liquid crystal display module 13: support main

40a, 40b: printed circuit board 50, 51: inserting device

50a, 51a: horizontal member 50b, 51b: vertical member

In order to achieve the above object, the present invention provides a liquid crystal display panel for displaying an image and a support main housing accommodating a backlight unit for supplying uniform light to the liquid crystal display panel, and an electrical signal connection with the liquid crystal display panel. And a liquid crystal display device including a printed circuit board installed at a lower portion, and an insertion device provided on a rear surface of the support main and into which the printed circuit boards are inserted. To provide.

The liquid crystal display according to the present invention having the above characteristics will be described in more detail with reference to the accompanying drawings.

3 is a rear and side view of the support main 13 showing the structure of the apparatus 50, 51 for inserting a printed circuit board according to the present invention.

The liquid crystal display of the present invention includes a support main 13 for loading a liquid crystal display panel and a backlight unit, PCBs (not shown) installed below the support main 13, and inserting devices into which the PCB is inserted ( 50, 51). The PCB is fixed and protected by insertion into the inserting devices 50, 51. To this end, the inside of the insertion device (50, 51) is provided with a flat receiving portion in which the PCB is inserted in the lower portion of the support main (13).

Here, the insertion devices 50 and 51 respectively include vertical members 50b and 51b extending downward from the rear surface of the support main 13 and horizontal members connecting the vertical members 50b and 51b. And 50a and 51a.

As shown in Fig. 3, the inserting devices 50, 51 are provided on the back of the support main 13 at the position where the PCB is to be installed. The inserting device (50, 51) is a vertical member (50b, 51b) extending downward of the support main to form a step of a constant height so that the PCB can be inserted, and the upper surface of the vertical member (50b, 51b) It consists of horizontal members (50a, 51a) covering. Between the vertical members 50b and 51b, the horizontal members 50a and 51a, and the rear surface of the support main 13, a receiving portion into which the PCB is inserted is formed. In general, the PCB is a thin plate material, when inserted into the inserting device (50, 51) is restrained by the horizontal members (50a, 51a) of the inserting device (50, 51) is not lifted.

In addition, the horizontal members (50a, 51a) is made of a thin plate formed corresponding to the front shape of the inserted PCB, which ensures complete insertion of the PCB to prevent the PCB from being damaged by contact with external objects For sake.

4 is a perspective view showing the rear surface of the support main 13 in which the inserting devices 50 and 51 according to the present invention are formed.

As shown in FIG. 4, inserting devices 50 and 51 into which the PCBs 40a and 40b are inserted are formed on the rear surface of the support main 13, and the inserting devices 50 and 51 are formed. It is preferably formed integrally with the support main 13. In other words, the inserting devices 50 and 51 are integrally formed during the injection molding of the support main 13. In general, the support main 13 is made of plastic, and thus is manufactured by injection molding. At this time, the inserting devices 50 and 51 are integrally formed with the support main 13 at the rear surface.

According to the arrangement of the circuit inside the liquid crystal display panel 11, the number of PCBs mounted on the outside of the panel 11 is different. However, in general, the source PCB 40a is mounted in the long side direction of the liquid crystal display panel 11, and the gate PCB 40b is mounted in the short side direction. Hereinafter, the specific application of the present invention considering the configuration of the PCBs (40a, 40b) will be described in detail.

The PCBs 40a and 40b include a source PCB 40a connected to the side of the liquid crystal display panel 11 in the scene direction, and a gate PCB 40b connected to the side of the short side direction. And a first inserting device 50 into which the source PCB 40a is inserted, and a second inserting device 51 into which the gate PCB 40b is inserted. Here, the configurations of the first inserting device 50 and the second inserting device 51 are the same as in the above-described embodiment. On the other hand, the position and the shape of the insertion device is variable corresponding to the position and the number of the PCB installed in the lower portion of the support main 13 will be seen through the above description.

In addition, it is preferable that both the first inserting device 50 and the second inserting device 51 are integrally formed with the support main 13.

Hereinafter, a method of manufacturing the liquid crystal display device of the present invention having the above configuration will be described in detail with reference to FIG. 4.

In the manufacturing method of the liquid crystal display device of the present invention, the source PCB 40a and the gate PCB 40b are connected to the liquid crystal display panel 11, and the PCBs 40a and 40b are inserted into the back surface of the support main 13, respectively. A first step of forming a first inserting device 50 and a second inserting device 51, and a second step of inserting the source PCB 40a into the first inserting device 50; And a third step of loading the liquid crystal display panel 11 into the support main 13 and a fourth step of inserting the gate PCB 40b into the second inserting device.

Here, the first step is performed such that the first inserting device 50 and the second inserting device 51 are integrally formed with the support main 13 when the support main 13 is ejected. This improves productivity because no additional attachment process is required.

In general, the liquid crystal display panel 11 is mounted on the support main 13 after PCBs 40a and 40b are attached to the side thereof using the TCPs 41a and 41b. This is because the attachment process requires precise technology. Here, the source PCB 40a connected in the long side direction among the PCBs connected to the liquid crystal display panel 11 includes more circuit elements than the gate PCB 40b, so the area is large. On the other hand, the gate PCB 40b is relatively short in width and small in overall size. In addition, even if the configuration is different from the above it will be seen that if the additional circuits concentrated on one of the plurality of PCBs as described above one PCB is large and the other PCBs can be configured to be small.

When the liquid crystal display panel 11 is first loaded on the support main 13 and the source PCB 40a is to be inserted into the first inserting device 50, the size and width of the source PCB 40a are long. The length of the TCP 41a is so short that it is difficult to ensure a free length for insertion, which makes insertion difficult. Therefore, before loading the liquid crystal display panel 11 into the support main 13, the source PCB 40a is first inserted into the first inserting device 50, and then the liquid crystal display panel 11 is inserted into the support main 11. It is preferable to load on top of the. Thereafter, the installation of the PCBs 40a and 40b is completed by inserting the relatively short gate PCB 40b into the second inserting device 51.

As described above, the PCBs 40a and 40b are inserted into the inserting devices 50 and 51, and the PCBs 40a and 40b are protected by being prevented from contacting with an external object and are more stably fixed. .

The insertion device provided in the above-described liquid crystal display of the present invention has the following effects.

First, since the inserting device is integrally formed on the back of the support main, the attachment process is unnecessary, thereby improving the manufacturing process of the LCM, thereby improving the productivity of the LCM.

Second, since the inserting device is a malt formed integrally with the support main, it does not need to be folded separately and can easily prevent a problem of tearing.

Third, since the inserting device is integrally formed during the manufacture of the support main, it is possible to prevent the problem of covering the screw hole for the side mounting by the assembly tolerance generated in the assembling process for the attachment.

Fourth, the PCBs are stably installed by being inserted into the inserting device formed on the back surface of the support main, thereby preventing the PCBs from being lifted up.

Claims (10)

A support main accommodating a liquid crystal display panel for displaying an image and a backlight unit for supplying uniform light to the liquid crystal display panel; Printed circuit boards electrically connected to the liquid crystal display panel and installed under the support main; And And a device for inserting the printed circuit board into the rear surface of the support main. The method of claim 1, The inserting device is Vertical members extending downward from the back of the support main; And a horizontal member covering an upper surface of the vertical member. The method of claim 2, And the horizontal member is a thin plate formed corresponding to the front shape of the inserted printed circuit board. The method of claim 1, And the insertion device is formed integrally with the support main. The method of claim 1, The printed circuit boards may include a source printed circuit board connected to a side of a liquid crystal display panel in a scene direction and a gate printed circuit board connected to a side of a short side, and the inserting apparatus may include a first inserting the source printed circuit board. And a second insertion device into which the gate printed circuit board is inserted. The method of claim 5, wherein The first inserting device and the second inserting device are respectively Vertical members extending downward from the back of the support main; And horizontal members covering the upper surface of the vertical member. The method of claim 6, And the horizontal member is a thin plate formed corresponding to the front shape of the inserted printed circuit board. The method of claim 5, wherein And the first inserting device and the second inserting device are integrally formed with the support main. A first step of connecting a source printed circuit board and a gate printed circuit board to a liquid crystal display panel, and forming a first inserting device and a second inserting device for inserting the printed circuit boards into a rear surface of a support main; Inserting the source printed circuit board into the first inserting device; A third step of mounting a liquid crystal display panel on the support main; And inserting the gate printed circuit board into the second inserting device. The method of claim 9, Wherein the first inserting device and the second inserting device are integrally formed with the support main when the support main is ejected.