KR20120075863A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: A liquid crystal display device is provided to prevent foreign materials between a rear side of a reflective plate and a protective sheet. CONSTITUTION: A support main(130) includes first to fourth horizontal portions(131). A light guide plate(123) is placed on the support main. A lamp(129) is arranged on one side of the light guide plate. An optical sheet(121) is placed on the light guide plate. A liquid crystal panel(110) is located on the optical sheet. First and second edges are attached to first and second steps of the support main on a reflecting plate(200).

Description

[0001] Liquid crystal display device [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a light weight and thin liquid crystal display device of a liquid crystal display device.

In line with the recent information age, the display field has also been rapidly developed, and a liquid crystal display device (FPD) is a flat panel display device (FPD) having advantages of thinning, light weight, and low power consumption. LCD, plasma display panel device (PDP), electroluminescence display device (ELD), field emission display device (FED), etc. : It is rapidly replacing CRT.

Among them, LCDs are excellent in moving image display and are most actively used in notebooks, monitors, TVs, etc. due to high contrast ratio. The LCDs are devices that do not have their own light emitting elements. It requires a light source.

As a result, a backlight unit having a lamp is provided on the rear side to irradiate light toward the front of the liquid crystal panel, thereby realizing an image of identifiable luminance.

1 is an exploded perspective view of a general liquid crystal display device.

As illustrated, a general liquid crystal display device includes a liquid crystal panel 10, a backlight unit 20, a support main 30, a cover bottom 50, and a top cover 40.

The liquid crystal panel 10 is a part that plays a key role in image expression and is composed of first and second substrates 12 and 14 bonded to each other with a liquid crystal layer interposed therebetween. The printed circuit board 17 is connected to one side edge of the liquid crystal panel 10 through the connection member 15.

In addition, the backlight unit 20 is provided behind the liquid crystal panel 10.

In this case, the backlight unit 20 includes a lamp 29 arranged along the longitudinal direction of at least one edge of the support main 30, a white or silver reflecting plate 25 mounted on the cover bottom 50, and the reflecting plate. The light guide plate 23 mounted on 25 and having a lamp 29 positioned on one side thereof and an optical sheet 21 interposed therebetween.

The liquid crystal panel 10 and the backlight unit 20 have a top cover 40 surrounding the top edge of the liquid crystal panel 10 and a back surface of the backlight unit 20 in a state where the edges are surrounded by the support main 30 having a rectangular frame shape. Cover cover 50 to cover each is coupled in front and rear are integrated through the support main 30 as a medium.

As a result, the light emitted from the lamp 29 is incident on the light incident portion of the light guide plate 23 and refracted in the direction of the liquid crystal panel 10. The light is processed to a high quality of uniform luminance while passing through the optical sheet 21 and the liquid crystal panel. It enters into (10).

As a result, the liquid crystal panel 10 displays an image to the outside.

On the other hand, the liquid crystal display device has recently been widely used, such as a desktop computer monitor and a wall-mounted television, as well as a portable computer. It is actively underway.

However, despite efforts to manufacture a liquid crystal display device in a light weight and a thin shape, there are too many components constituting the liquid crystal display device, which hinders the thinness and light weight of the liquid crystal display device.

In addition, when the cover cover 50 is deleted in order to solve the above problems, the reflection plate 25 is exposed to the outside, causing a problem of damage.

The present invention has been made to solve the above problems, and a first object of the present invention is to provide a thin and lightweight liquid crystal display device.

In addition, the second object is to improve the efficiency of the module process of assembling the reflector, and the third object is to improve the efficiency of the module process of assembling a protective sheet for preventing damage to the reflector.

In order to achieve the object as described above, the present invention includes a first and second horizontal portion facing each other in the longitudinal direction, and a third and fourth horizontal portion perpendicular to the first and second horizontal portion, A support main having a first to fourth step formed of a first end and a second end perpendicular to the first end on a rear surface of the first to fourth horizontal parts; A light guide plate seated in the support main; A lamp arranged on one side of the light guide plate; An optical sheet seated on the light guide plate; A liquid crystal panel positioned on the optical sheet; A chamfer part having a first edge and a second edge attached to the first and second steps of the support main, wherein a part of a corner formed by the first edge and a third edge perpendicular to the first edge is separated. And a reflecting plate forming a corner, wherein an edge formed by the first step and the third step perpendicular to the first step is formed to correspond to the chamfer portion, and the first and second edges are formed in the first and second step. Provided is a liquid crystal display device which is spaced apart from the first end of the apparatus.

In this case, the support main may have a rectangular rim shape formed of the first to fourth horizontal parts and the first to fourth side surfaces perpendicular to the first to fourth horizontal parts, respectively, and the chamfer part includes the first edge and the The third edge is connected to the chamfer surface.

The first end of the first step and the first end of the third step are connected to an alignment end corresponding to the chamfer surface, and the reflector is formed at an edge formed by the chamfer surface and the third edge, the alignment end, and the The edge formed by the first end of the third step is aligned and attached to the rear surface of the support main.

In this case, an angle of an edge formed by the chamfer surface and the third edge and an angle of an edge formed by the first end of the alignment end and the third step are the same.

In addition, the present invention provides a support main device including first and second horizontal parts facing each other in the longitudinal direction, and third and fourth horizontal parts perpendicular to the first and second horizontal parts; A light guide plate seated in the support main; A lamp arranged on one side of the light guide plate; An optical sheet seated on the light guide plate; A liquid crystal panel positioned on the optical sheet; First and second edges attached to the rear surfaces of the first to fourth horizontal portions of the support main and corresponding to the first and second horizontal portions, and third and third perpendicular to the first and second edges. A reflector comprising four edges; A protective sheet attached to the rear surface of the reflecting plate, the protective sheet including first and second edges corresponding to the first and second horizontal portions, and third and fourth edges perpendicular to the first and second edges; And the third edge side of the protective sheet has the same shape as that of the third edge side of the reflective plate.

Here, the first and second edges of the protective sheet are configured with first and second chipping portions covering a portion of the rear surface of the first and second horizontal portions, and are formed at the first and second edges of the protective sheet. The first and second chipping portions are formed spaced apart from the third edge of the protective sheet.

The protruding end is formed at the fourth edge of the protective sheet, and the protective sheet is made of a transparent material having color.

As described above, according to the present invention, by attaching the reflecting plate exposed to the back of the liquid crystal display device at the correct position on the back of the support main, and also the protective sheet for protecting the back of the reflecting plate at the correct position on the back of the reflecting plate, Through this, there is an effect that can prevent the occurrence of a white point defect on the screen, there is an effect that can prevent the generation of foreign matter defects between the back of the reflector and the protective sheet.

In addition, there is an effect to improve the efficiency of the process, there is an effect that can prevent the peeling phenomenon of the reflecting plate and the protective sheet, there is an effect that can prevent the occurrence of defects in the liquid crystal display device.

1 is an exploded perspective view of a general liquid crystal display device.
2 is an exploded perspective view showing a liquid crystal display device according to an embodiment of the present invention.
3 is a schematic cross-sectional view of a partial cross section of FIG. 2 modularized;
4A to 4B are perspective views schematically showing a module process of attaching a reflecting plate.
4C is a schematic plan view of a portion of FIGS. 4A-4B;
Figure 5a is a perspective view schematically showing a module process for attaching a protective sheet.
5B is a top view of FIG. 5A.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

The present invention can be applied to mobile phones, digital multimedia broadcasting (DMB) terminals, small liquid crystal display devices mounted on PDAs (personal digital assistants) and digital cameras, and large liquid crystal display devices used in TVs or computer monitors. In the following, a small liquid crystal display manufactured to 5 inches or less will be described as an example.

FIG. 2 is an exploded perspective view illustrating a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 3 is a cross-sectional view schematically illustrating a partial cross section of FIG.

As shown in FIG. 2, the LCD includes a liquid crystal panel 110, a backlight unit 120, a support main 130, and an adhesive tape 140.

First, the liquid crystal panel 110 plays a key role in image expression, and includes the first and second substrates 112 and 114 bonded to each other with the liquid crystal layer interposed therebetween.

At this time, although not clearly shown in the drawings under the premise of an active matrix method, a plurality of gate lines and data lines intersect on the inner surface of the first substrate 112, which is commonly referred to as a lower substrate or an array substrate, thereby defining pixels. Thin film transistors (TFTs) are provided at each intersection to be connected one-to-one with the transparent pixel electrodes formed in each pixel.

An inner surface of the second substrate 114, called an upper substrate or a color filter substrate, may correspond to each pixel, for example, a color filter of red (R), green (G), and blue (B) color, and these. A black matrix is provided around each other to cover non-display elements such as gate lines, data lines, and thin film transistors. In addition, a transparent common electrode covering them is provided.

The printed circuit board 117 is connected to at least one edge of the liquid crystal panel 110 via a connecting member 115 such as a flexible circuit board, so that the side surface of the support main 130 or the backlight unit 120 is modularized. It is rolled up to the back of and closes.

Although not clearly shown in the drawings, upper and lower alignment layers (not shown) for determining the initial molecular alignment direction of the liquid crystal are interposed between the two substrates 112 and 114 of the liquid crystal panel 110 and the liquid crystal layer. In order to prevent leakage of the liquid crystal layer filled therebetween, a seal pattern is formed along edges of both substrates 112 and 114.

In this case, polarizers (not shown) are attached to outer surfaces of the first and second substrates 112 and 114, respectively.

A backlight unit 120 for supplying light is provided on a rear surface of the liquid crystal panel 110 such that a difference in transmittance of the liquid crystal panel 110 is expressed to the outside.

The backlight unit 120 includes a lamp 129 arranged along at least one edge length direction of the support main 130, a white or silver reflector 200, and a light guide plate 123 mounted on the reflector 200. And it includes an optical sheet 121 interposed thereon.

Although not shown in the drawings, the light shielding tape may further include a light shielding tape between the optical sheet 121 and the liquid crystal panel 110 to prevent light from leaking to portions outside the screen display area of the liquid crystal panel 110.

In addition, a lamp guide for guiding the lamp 129 is further provided, and the lamp guide surrounds the top and bottom and the outside of the lamp 129 with the inner side facing the light guide plate 123 open, and the light with the protection of the lamp 129. Is concentrated in the direction of the light guide plate 123.

In this case, the lamp 129 may be used as a light source, a fluorescent lamp such as a cold cathode fluorescent lamp (external electrode fluorescent lamp) or an external electrode fluorescent lamp (external electrode fluorescent lamp).

Alternatively, a light-emitting diode (LED) may be used as the lamp 129 in addition to the fluorescent lamp, and the lamp guide may be omitted when the light-emitting diode is used.

The light guide plate 123 uniformly spreads the light incident from the lamp 129 into a wide area of the light guide plate 123 while propagating through the light guide plate 123 by several total reflections to provide a surface light source to the liquid crystal panel 110.

The light guide plate 123 may include a pattern of a specific shape on the rear surface to supply a uniform surface light source.

Here, the pattern may be configured in various ways, such as an elliptical pattern, a polygon pattern, a hologram pattern, and the like to guide the light incident into the light guide plate 123. The pattern is formed on the lower surface of the light guide plate 123 by a printing method or an injection method.

In addition, the reflector 200 is positioned on the rear surface of the light guide plate 123 and reflects light passing through the rear surface of the light guide plate 123 toward the liquid crystal panel 110 to improve the brightness of the light.

In this case, the reflector 200 is attached to the rear surface of the modular liquid crystal display and exposed to the outside.

The optical sheet 121 on the light guide plate 123 includes a diffusion sheet and at least one light collecting sheet.

Here, the diffusion sheet is positioned directly on the light guide plate 123, and serves to adjust the direction of light so that the light propagates toward the light collecting sheet while dispersing light incident through the light guide plate 123.

The light diffused through the diffusion sheet by the light collecting sheet is focused in the direction of the liquid crystal panel 110. As a result, the light passing through the light collecting sheet is almost perpendicular to the liquid crystal panel 110.

Meanwhile, the backlight unit 120 having the above-described structure is called a side light method, and a plurality of lamps 129 may be arranged in a plurality of layers along an inner length direction of one edge of the support main 130. It is also possible to arrange them side by side along the inner longitudinal direction of both edges of the main 130 facing each other.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the support main 130 and the adhesive tape 140. The support main 130 is formed by vertically bending the edges thereof in a rectangular frame shape.

That is, the support main 130 is perpendicular to the horizontal portion 131 and the horizontal portion 131 which surrounds a part of the edge rear surface of the backlight unit 120 except for the reflective plate 200, so that the liquid crystal panel 110 and the reflective plate 200 may be disposed. The vertical unit 133 is formed around the edge of the backlight unit 120.

Accordingly, the rear surface of the backlight unit 120, ie, the rear surface of the light guide plate 123, in which the reflector 200 is excluded by the horizontal part 131 of the support main 130 is supported, and the liquid crystal is supported by the vertical part 133. The edge of the backlight unit 120 except the panel 110 and the reflector 200 is surrounded.

At this time, the support main 130 may be referred to as a guide panel or a main support, a mold frame.

The adhesive tape 140 covers the top and side surfaces of the four edges of the liquid crystal panel 110 to open the front surface of the liquid crystal panel 110 to display an image implemented in the liquid crystal panel 110.

The adhesive tape 140 extends outside the vertical portion 133 of the support main 130 to integrally modularize the liquid crystal panel 110 and the support main 130.

That is, the liquid crystal panel 110 and the backlight unit 120 of the present invention prevent the detachment of the backlight unit 120 while the edge is surrounded by the support main 130 and the liquid crystal panel through the adhesive tape 140. The liquid crystal panel 110 may be prevented from being detached by surrounding the upper and side surfaces of the four edges.

This allows the adhesive tape 140 to replace all the inherent roles of the existing top cover (40 in FIG. 1), and instead of all of the inherent role of the existing cover cover (50 in FIG. 1) through the support main 130. By doing so, it is possible to thin the liquid crystal display module by removing the top cover (40 in FIG. 1) and the cover bottom (50 in FIG. 1), and the effect of simplifying and reassembling the process is brought.

In addition, due to the removal of the top cover (40 of FIG. 1) and the cover bottom (50 of FIG. 1) made of a metal material, it is possible to reduce the process cost.

Meanwhile, as shown in FIG. 3, the reflective plate 200 of the present invention is attached to the rear surface of the horizontal portion 131 of the support main 130 through an adhesive material 250 such as a double-sided tape. On the rear surface of the horizontal portion 131 of 130, a step 135 to which the reflective plate 200 is attached is formed.

In particular, the liquid crystal display of the present invention is formed so as to form a chamfer part 210 having one of the corners of the edge of the reflector 200 separated, and the rear surface of the horizontal part 131 of the support main 130. One edge of the stepped portion 135 formed in the is characterized in that the shape made to correspond to the chamfer portion (210).

Therefore, in the process of attaching the reflector 200 to the back surface of the support main 130, a standard for aligning the reflector 200 at the correct position of the back surface of the support main 130 is presented.

Through this, the reflector 200 may be attached to the correct position in the process of attaching the reflector 200 to the rear surface of the support main 130. We will discuss this in more detail later.

In addition, a protective sheet 300 is attached to the rear surface of the reflective plate 200, and the protective sheet 300 of the reflective plate 200 is exposed as the rear surface of the reflective plate 200 is exposed through the deletion of cover cover 50 (FIG. 1). Protects the back.

In this case, a chipping part 310 is formed at both edges of the protective sheet 300.

The protective sheet 300 is removed in the process of assembling the liquid crystal display device into a case (not shown) to complete the finished product.

At this time, the protective sheet 300 is characterized in that the overall shape except for the region in which the chapping portion 310 is formed in the same manner as the reflective plate 200.

Through this, the protective sheet 300 may be attached to the correct position in the process of attaching the protective sheet 300 to the rear surface of the reflecting plate 200. Let's take a closer look at this.

- First Embodiment -

4A to 4B are perspective views schematically illustrating a module process of attaching a reflector plate, and FIG. 4C is a plan view schematically illustrating a part of FIGS. 4A to 4B.

As shown in FIG. 4A, an optical sheet (121 of FIG. 3), a lamp (129 of FIG. 2) and a light guide plate 123 of the liquid crystal panel (110 of FIG. 2) and the backlight unit (120 of FIG. 2) of the liquid crystal display device are shown. ) Is modularized through the support main 130 and the adhesive tape 140.

At this time, the back surface of the first to fourth horizontal portions 131a, 131b, 131c, and 131d of the four edges of the support main 130 are provided with the first to fourth stepped portions 135a, 135b, 135c, 135d) is formed.

The first to fourth steps 135a, 135b, 135c, and 135d are formed inside the support main 130, and the first to fourth steps 135a, 135b, 135c, and 135d each have an angle of the support main 130. Perpendicular to the first stages 136a, 137a and the first stages 136a, 137a perpendicular to the back surface of the horizontal portions 131a, 131b, 131c, and 131d, respectively, of the horizontal portions 131a, 131b, 131c, and 131d. And second stages 136b and 137b parallel to the back surface.

The four edges 201a. 201b, 201c, and 201d of the reflector 200 are attached to the first to fourth stepped portions 135a, 135b, 135c, and 135d, so that the first to fourth horizontal portions of the support main 130 are supported. The rear surfaces of the 131a, 131b, 131c, and 131d and the reflector 200 maintain the same plane.

Here, the reflector 200 is composed of a polyethylene film and a reflective layer coated with silver (Ag) having a 90% reflectance of visible light on the polyethylene film (not shown). ) Is a base film, it is preferable to use a polyethylene series containing terephthalic acid (terephthalic acid) having a good dimensional stability.

The reflective layer (not shown) is formed by depositing silver (Ag) metal particles under a high vacuum by vacuum deposition or sputtering on a polyethylene film (not shown). In this case, in addition to the silver (Ag) metal particles, it may be formed of copper (Cu), aluminum (Al), tin (Sn), gold (Au), stainless steel (SUS), etc., which has excellent reflection efficiency, but absorbs light. It is most preferable to use silver (Ag) which is excellent in the property of mirror-reflecting without.

Although the thickness of such a reflection layer (not shown) is not specifically limited, Although it forms in 50-2000 micrometers, it is preferable to form in the thickness of 500-1000 micrometers.

If the thickness of the reflecting layer (not shown) is less than 50 microns, the reflectance enhancement effect is insignificant, and many voids are generated on the surface of the reflecting layer (not shown). This is because the deposition or sputtering rate is slow, which increases the process time and the process cost.

The reflector 200 is also referred to as an enhanced specular reflector (ESR), and has a reflectance of 98% and a transmittance of 2%, so that most of the light passing through the rear surface of the light guide plate 123 is directed toward the liquid crystal panel (110 in FIG. 3). Make it reflected.

On the other hand, the reflective plate 200 has the first and second edges 201a and 201b, which are two edges facing each other in the longitudinal direction, with the stepped portion 135a of the support main 130 through the adhesive material 250 (see FIG. 3). It is fixed by bonding to the 135b, 135c, 135d, wherein the first and second edges 201a, 201b are the first and second horizontal portions 131a, 131b facing each other in the longitudinal direction of the support main 130. It is attached to the first and second step (135a, 135b) formed in.

At this time, the reflector 200 has the first and second edges 201a and 201b of the reflector 200 in consideration of process errors, and thus the second and second steps 135a and 135b of the support main 130 are provided. It is formed so as not to completely cover the stage 137b.

That is, the ends of the first and second edges 201a and 201b of the reflective plate 200 shown in the drawing are spaced apart from the first end 137a of the first and second stepped portions 135a and 135b by a predetermined distance. It is attached with (d).

Here, in the process of attaching the reflector 200 to the back surface of the support main 130, the first and second edges 201a and 201b and the first and second step 135a of the reflector 200 should be most important. And 135b is a constant distance d from each of the first stages 137a.

At this time, when the distance d of the first and second edges 201a and 201b of the reflector 200 and the first ends 137a of the first and second stepped portions 135a and 135b is not constant, The reflector 200 is biased to one edge of the support main 130.

Therefore, the adhesive material (250 of FIG. 3) formed at the edge of the reflecting plate 200 in the longitudinal direction may be attached to the light guide plate 123, whereby light incident into the light guide plate 123 is adhesive. The material (250 in FIG. 3) is not totally reflected at the portion to which it is attached, causing white point defects on the screen.

Thus, when the reflecting plate 200 is attached to one edge of the support main 130, a process of reattaching the reflecting plate 200 is performed. In this case, the adhesive force of the reflecting plate 200 is lowered to reflect the reflecting plate 200. Peeling phenomenon occurs.

This lowers the efficiency of the process and finally causes a defect of the liquid crystal display.

Accordingly, in the present invention, the chamfer portion 210 is formed at one corner of the reflector 200 and the stepped portions 135a and 135b are formed on the rear surfaces of the horizontal portions 131a, 131b, 131c, and 131d of the support main 130. By forming one corner of the reflective plate 200 to correspond to the chamfer 210 of the reflective plate 200, the first and second edges 201a and 201b of the reflective plate 200 are formed of the first and second stepped portions ( The reflective plate 200 may be attached at an accurate position so as to maintain a predetermined distance d from the first end 137a of the 135a and 135b.

In more detail, as shown in FIGS. 4B and 4C, one edge of the reflector 200 forms the chamfer 210, that is, the first edge 201a and the first edge of the reflector 200. The third edge 201c perpendicular to the edge 201a is connected to the chamfer surface 203 to form the chamfer 210.

The edges of the stepped portions 135a, 135b, 135c, and 135d formed on the rear surfaces of the horizontal parts 131a, 131b, 131c, and 131d of the support main 130, that is, the first stepped portions 135a and the first stepped portions 135a An edge formed by each of the first ends 137a of the third step 135c perpendicular to) corresponds to the chamfer 210 of the reflector 200.

That is, each of the first ends 136a and 137a of the first step 135a and the third step 135c has an alignment end 139 corresponding to the chamfer surface 203 of the reflector 200. Of the corner formed by the angle θ1 of the edge formed by the third edge 201c of the reflector 200 and the chamfer surface 203 and the first end 136a and the aligned end 139 of the third step 135c. The angle θ2 is the same.

Accordingly, in the process of attaching the reflector 200 to the rear surface of the horizontal portions 131a, 131b, 131c, and 131d of the support main 130, the third edge 201c and the chamfer surface 203 of the reflector 200 are formed. Align the corner formed with the edge formed by the first end 136a and the alignment end 139 of the third step 135c of the support main 130, and attach the reflector 200 to the rear surface of the support main 130. When the first and second edges 201a and 201b of the reflector 200 are lower than the first end 137a of the first and second stepped portions 135a and 135b of the support main 130, a predetermined distance d is provided. The reflector 200 may be attached to the correct position to maintain.

As described above, the liquid crystal display of the present invention can attach the reflector 200 to the correct position of the back of the support main 130, thereby preventing the occurrence of white point defects on the screen, and the efficiency of the process Will improve.

In addition, the peeling phenomenon of the reflective plate 200 can be prevented from occurring, so that a defect of the liquid crystal display device can be prevented from occurring.

In the liquid crystal display of the present invention, a protective sheet (300 of FIG. 3) for protecting the reflective plate 200 is attached to the rear surface of the reflective plate 200, and the protective sheet (300 of FIG. 3) is a liquid crystal of the present invention. This is to prevent the reflective plate 200 from being exposed to the outside and being damaged due to the deletion of the cover bottom (50 in FIG. 1) during the modularization of the display device.

The protective sheet 300 of FIG. 3 is removed in the process of assembling the liquid crystal display device into a case (not shown) to complete the finished product.

- Second Embodiment -

5A is a perspective view schematically illustrating a module process of attaching a protective sheet, and FIG. 5B is a plan view of FIG. 5A.

As shown in FIG. 5A, an optical sheet (121 of FIG. 3), a lamp (129 of FIG. 2), and a light guide plate of the liquid crystal panel (110 of FIG. 3) and the backlight unit (120 of FIG. 2) of the liquid crystal display device are shown. 123 of 4a is modularized through the support main 130 and the adhesive tape 140.

In this case, the reflector 200 is attached to the rear surfaces of the first to fourth horizontal parts 131a, 131b, 131c, and 131d at the four edges of the support main 130, where one corner of the reflector 200 is a chamber. One of the stepped portions (135a, 135b, 135c, and 135d in FIG. 4A) formed on the rear surface of the first to fourth horizontal portions 131a, 131b, 131c, and 131d of the support main 130, forming a puddle 210. The edge is formed to correspond to the chamfer portion 210 of the reflecting plate 200.

Through this, the reflector 200 is attached to the correct position on the back of the support main 130.

In addition, a protective sheet 300 is attached to the rear surface of the reflector 200 to protect the reflector 200 from the outside.

Here, the protective sheet 300 is made of a synthetic resin of a transparent material, in particular, may be selected from polyethylene terephthalate (PET), polyethylene (polyethylene), polyamide (polyamide).

At this time, the protective sheet 300 is attached to the correct position on the back of the reflector 200, if the protective sheet 300 is not attached to the correct position on the back of the reflector 200, the back and the protective sheet of the reflector 200 Foreign material defects will occur between the 300.

Therefore, the process of re-attaching the protective sheet 300 is to be carried out, which causes the peeling phenomenon of the protective sheet 300 through a decrease in the adhesive strength of the protective sheet 300, through which, to reduce the efficiency of the process do.

Finally, the liquid crystal display may be defective.

Therefore, in the liquid crystal display of the present invention, by forming a part of the protective sheet 300 in the same shape as the reflective plate 200, the reflective plate 200 in the process of attaching the protective sheet 300 to the rear surface of the reflective plate 200 By using the protective sheet 300 as a reference, the protective sheet 300 can be attached at the correct position on the rear surface of the reflecting plate 200.

Looking at this in more detail, as shown in Figure 5b the overall shape of the protective sheet 300 is formed in a rectangular plate shape corresponding to the size of the reflecting plate 200, wherein the first and second of the reflecting plate 200 The first and second edges 301a and 301b of the protective sheet 300 corresponding to the edges 201a and 201b cover the first and second edges 201a and 201b of the reflector 200 and at the same time support main 130. The first and second chipping portions 310a and 310b to cover up to a portion of the rear surface of the first and second horizontal portions 131a and 131b in which the first and second stepped portions 135a and 135b of FIG. 4A are formed. It is characterized by being formed.

The first and second chipping portions 310a and 310b are formed on the first and second edges 301a and 301b spaced apart from the third edge 301c of the protective sheet 300 by the protective sheet ( The third edge 301c side of the 300 has the same shape as the third edge 201c side of the reflector 200.

Accordingly, in the process of attaching the protective sheet 300 to the rear surface of the reflector 200, the third edge 301c side of the protective sheet 300 is accurately aligned with the third edge 201c side of the reflector 200. Thereafter, the protective sheet 300 is attached to the rear surface of the reflecting plate 200.

Through this, the protective sheet 300 may be attached to the correct position of the rear surface of the reflector plate 200.

At this time, the protective sheet 300 is preferably formed to have a color, such as blue rather than colorless for more accurate alignment.

That is, in the process of attaching the protective sheet 300 to the rear surface of the reflecting plate 200 through the protective sheet 300 having a color to determine the position of the protective sheet 300 more accurately.

The protective sheet 300 includes first and second chipping portions 310a and 310b formed at the first and second edges 301a and 301b of the protective sheet 300. 2 is attached to the rear surface of the reflective plate 200 so as to cover part of the rear surface of the horizontal portions 131a and 131b, and in the process of peeling off the protective sheet 300 later, by the adhesive force between the protective sheet 300 and the reflective plate 200. The reflective plate 200 may be prevented from being peeled off together with the protective sheet 300.

That is, the protective sheet 300 of the present invention is formed in the same shape as the reflecting plate 200 in order to attach to the correct position of the rear surface of the reflecting plate 200, it is attached to align with respect to the reflecting plate 200, this time, When the overall shape of the protective sheet 300 is completely formed in the same manner as the reflective plate 200, the reflective plate 200 together with the protective sheet 300 in the process of peeling the protective sheet 300 in the future of the support main 130 The problem of peeling from the back side may occur.

Therefore, in the protective sheet 300 of the present invention, the adhesive force for bonding the protective sheet 300 to the rear surface of the reflecting plate 200 is not concentrated on the reflecting plate 200, and the first and second chipping parts 310a and 310b are used. By dispersing to the back of the first and second horizontal portions (131a, 131b) of the support main 130 through the), in the process of peeling off the protective sheet 300, the reflecting plate 200 with the protective sheet 300 Peeling is prevented.

The protruding end 320 is formed at one side of the fourth edge 301d of the protective sheet 300. A process of peeling the protective sheet 300 from the reflector 200 by the protruding end 320 may be easily performed.

That is, in the process of assembling the liquid crystal display device in a case (not shown) to complete the finished product, a process of peeling the protective sheet 300 from the reflector 200 is performed. This peeling process is performed by a worker's manual work.

Therefore, the worker can easily perform the peeling process through the protruding end 320 in the process of peeling the protective sheet 300 from the reflecting plate 200. The size of the protruding end 320 is not particularly limited to a size that is easy for a worker's manual work.

As described above, the liquid crystal display device of the present invention attaches the protective sheet 300 to the correct position of the rear surface of the reflecting plate 200, thereby preventing foreign matters from occurring between the rear surface of the reflecting plate 200 and the protective sheet 300. In addition, the adhesive force of the protective sheet 300 is lowered through the process of reattaching the protective sheet 300 to prevent the peeling phenomenon of the protective sheet 300 from occurring.

As a result, the efficiency of the process may be improved, and finally, the defect of the liquid crystal display may be prevented from occurring.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

110: liquid crystal panel 112: first substrate, 114: second substrate
120: backlight unit, 121: optical sheet, 123: light guide plate, 129: lamp
130: support main (131: horizontal portion, 133: vertical portion)
140: adhesive tape
200: reflector, 210: chamfer
300: protective sheet, 310: chapping part

Claims (11)

First and second horizontal portions facing each other in the longitudinal direction, and third and fourth horizontal portions perpendicular to the first and second horizontal portions, wherein the first and second horizontal portions are formed on the rear surface of the first to fourth horizontal portions. A support main having first to fourth stepped portions formed of second stages perpendicular to the first stage;
A light guide plate seated in the support main;
A lamp arranged on one side of the light guide plate;
An optical sheet seated on the light guide plate;
A liquid crystal panel positioned on the optical sheet;
A chamfer part having a first edge and a second edge attached to the first and second steps of the support main, wherein a part of a corner formed by the first edge and a third edge perpendicular to the first edge is separated. Reflector
A corner formed by the first step and the third step perpendicular to the first step is formed to correspond to the chamfer portion, and the first and second edges of the first step and the first step of the second step. Liquid crystal display device is attached spaced apart from the end.
The method of claim 1,
The support main is a rectangular frame having a rectangular frame having first to fourth horizontal portions and first to fourth side surfaces perpendicular to the first to fourth horizontal portions, respectively.
The method of claim 1,
And the chamfer portion wherein the first edge and the third edge are connected to the chamfer surface.
The method of claim 3, wherein
And a first end of the first step and a first end of the third step are connected to an alignment end corresponding to the chamfer surface.
The method of claim 4, wherein
And the reflecting plate to align the edge formed by the chamfer surface and the third edge and the edge formed by the alignment end and the first end of the third step and attach the rear surface of the support main.
The method of claim 5, wherein
And an angle of an edge formed by the chamfer surface and the third edge and an angle formed by the first end of the alignment end and the third step.
A support main unit including first and second horizontal parts facing each other in the longitudinal direction, and third and fourth horizontal parts perpendicular to the first and second horizontal parts;
A light guide plate seated in the support main;
A lamp arranged on one side of the light guide plate;
An optical sheet seated on the light guide plate;
A liquid crystal panel positioned on the optical sheet;
First and second edges attached to the rear surfaces of the first to fourth horizontal portions of the support main and corresponding to the first and second horizontal portions, and third and third perpendicular to the first and second edges. A reflector comprising four edges;
A protective sheet attached to the rear surface of the reflecting plate and including first and second edges corresponding to the first and second horizontal portions, and third and fourth edges perpendicular to the first and second edges;
And a third edge side of the protective sheet having the same shape as that of the third edge side of the reflective plate.
The method of claim 7, wherein
And first and second chipping portions covering portions of the rear surfaces of the first and second horizontal portions at the first and second edges of the protective sheet.
The method of claim 7, wherein
And the first and second chipping portions formed at the first and second edges of the protective sheet to be spaced apart from the third edge of the protective sheet.
The method of claim 7, wherein
And a protruding end formed at the fourth edge of the protective sheet.
The method of claim 7, wherein
The protective sheet is a liquid crystal display device made of a transparent material having a color.

Images