KR20090131082A - Liquid crystal display module - Google Patents

Abstract

PURPOSE: A liquid crystal display module is provided to prevent a liquid crystal layer narrowed in an edge area of a liquid crystal panel from being pressed, thereby preventing ripples in an edge area of the liquid crystal panel. CONSTITUTION: A supporter main mounts a liquid crystal panel(123) using a mounting terminal. The mounting terminal comprises a mounting part and a stepped part. The mounting part is formed with the first height by avoiding an area where the liquid crystal layer exists and induces mounting of the liquid crystal panel. The stepped part is overlapped with a sealant opening area. The stepped part is formed with the second height lower than the first height. The stepped part is spaced from the mounted liquid crystal panel at a fixed interval. The mounting unit is overlapped with an area on which the sealant is applied.

Description

Liquid Crystal Display Module

The present invention relates to a liquid crystal display module, and more particularly to a liquid crystal display module to prevent ripple in the edge region of the liquid crystal panel.

In today's information society, display elements are more important than ever as visual information transfer media. Cathode ray tubes or CRT tubes, which were once mainstream, had problems with weight and volume. In order to overcome the limitations of the cathode ray tube, many kinds of flat panel displays have been developed.

Flat display devices include Liquid Crystal Display (LCD), Field Emission Display (FED), Plasma Display Panel (PDP) and Electro-luminescence (EL). And most of them are commercially available and commercially available.

Among these, in particular, liquid crystal display devices have tended to be gradually widened due to their light weight, thinness, and low power consumption. In accordance with this trend, liquid crystal display devices are used as portable computers such as notebook PCs, office automation equipment, audio / video equipment, indoor and outdoor advertising display devices, and the like. The liquid crystal display device displays a desired image on a screen by adjusting a transmission amount of a light beam according to image signals applied to a plurality of control switches arranged in a matrix. The liquid crystal display is rapidly developing in size and high resolution due to the recent mass production technology and the achievement of R & D.

In general, the liquid crystal display element is composed of a liquid crystal display module and a driving circuit portion for driving the liquid crystal display module.

The liquid crystal display module includes a liquid crystal panel in which liquid crystal cells are arranged in a matrix between two glass substrates, and a back light unit for irradiating light to the liquid crystal panel. In order to prevent light loss, the liquid crystal panel and the backlight unit must be fastened in an integrated form and must be protected from being damaged by an external impact. To this end, a case for a liquid crystal display device formed to surround a backlight unit including an edge of the liquid crystal panel is provided.

There are two types of backlight unit of the liquid crystal display module, a direct type type and an edge type type. In the edge type method, a light source is disposed outside the flat plate, and light is incident on the entire surface of the liquid crystal panel using a transparent light guide plate. In the direct type method, a light source is placed on the back of the liquid crystal panel to directly irradiate the liquid crystal panel.

FIG. 1 is a plan view of a liquid crystal display module employing a conventional edge type backlight unit, and FIG. 2 is a cross-sectional view of FIG. 1 taken along line II ′. In FIG. 2, 'CT' represents a region occupied by the case top, 'PL' represents a panel region occupied by the liquid crystal panel, 'SL' represents a sealant region occupied by the sealant, and 'LC' represents a liquid crystal region occupied by the liquid crystal layer, 'SM' represents the area occupied by the supporter main. 2, reference numeral 38 denotes a light shielding tape for preventing light loss.

1 and 2, the conventional liquid crystal display module includes a supporter main 10, a liquid crystal panel assembly 20 and a backlight unit 30 stacked inside the supporter main 10, and a supporter main 10. The cover bottom 40 to surround the side and the bottom and bottom of the backlight unit 30, and the case top 10 for wrapping the edge of the liquid crystal panel assembly 20 and the side of the cover bottom 40 do.

The liquid crystal panel assembly 20 includes a liquid crystal panel 23 including upper and lower substrates 21 and 22, a liquid crystal layer (not shown), a spacer (not shown), and a sealant 24, and upper and lower polarizers 25 and 26. ). The liquid crystal layer is sandwiched between the upper substrate 21 and the lower substrate 22 and a spacer is formed to maintain a constant gap therebetween. The upper substrate 21 and the lower substrate 22 are bonded by the sealant 24, and the upper polarizer 25 and the lower polarizer 26 are attached to each of the front and rear surfaces thereof.

The supporter main 10 is a mold, and the side wall surface thereof is formed into a stepped stepped surface, and the liquid crystal panel assembly 20 is seated using the stepped surface as a seating end 10a. Although not shown, the backlight unit 130 irradiating light to the liquid crystal panel assembly 20 is also fixed to the inner sidewall surface of the supporter main 10. Here, the backlight unit 130 includes an optical sheet 35, a light guide plate 34, and a reflector 36, including a light source assembly (not shown).

However, in the conventional liquid crystal display module, the liquid crystal panel 23 includes not only the sealant region SL but also a part of the liquid crystal region LC, as shown in FIG. 2, to be stacked on the seating end 10a of the supporter main 10. . Accordingly, in the conventional liquid crystal display module, a ripple is generated in the edge region A of the liquid crystal panel 23 by the liquid crystal region LC that overlaps with the seating end 10a of the supporter main 10. do. This ripple is generated when the liquid crystal layer held in the edge region A of the liquid crystal panel 23 is pressed by the seating end 10a of the supporter main 10.

Accordingly, an object of the present invention is to provide a liquid crystal display module which prevents ripple in the edge region of the liquid crystal panel.

In order to achieve the above object, the liquid crystal display module according to an exemplary embodiment of the present invention includes a sealant having an open area for injecting liquid crystal and bonding the first and second substrates with the substrates, and the sealant open area. A liquid crystal panel having a liquid crystal layer injected between the bonded substrates; And a supporter main for seating the liquid crystal panel using the stepped surface formed on the inner sidewall surface as a seating end. The seating end is formed to a first height avoiding a region where the liquid crystal layer is present, and a seating portion for inducing mounting of the liquid crystal panel, and a second height overlapping the sealant open area and lower than the first height. And a stepped portion spaced apart from the liquid crystal panel seated at a predetermined interval.

The seating portion is formed to overlap the area where the sealant is applied.

The spacing between the seating portion and the stepped portion is 0.1 mm to 0.3 mm.

The spacing between the seat and the step is 0.2 mm.

In order to induce the mounting of the liquid crystal panel assembly, the liquid crystal display module according to the present invention includes a seating portion formed at a first height so as not to overlap with the liquid crystal region corresponding to a region where the liquid crystal injection hole of the liquid crystal panel is not formed, and the liquid crystal of the liquid crystal panel. The seating end is formed by a stepped portion formed at a second height lower than the first height corresponding to the region where the injection hole is formed, so that the liquid crystal layer held in the edge region of the liquid crystal panel is not pressed by the seating end of the supporter main. The occurrence of ripple in the edge region of the panel can be suppressed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 3 to 6.

3 is a plan view illustrating a liquid crystal display module according to an exemplary embodiment of the present invention. FIG. 4 is a cross-sectional view of FIG. 3 taken along II-II ', and FIG. 5 is a cross-sectional view of FIG. 3 taken along III-III'. In FIGS. 4 and 5, 'CT' represents a region occupied by the case top, 'PL' represents a panel region occupied by the liquid crystal panel, 'SL' represents a sealant region occupied by the sealant, and 'LC' occupies a liquid crystal layer. The liquid crystal region, 'SM' represents the region occupied by the supporter main, and 'CP' represents the encapsulation region occupied by the encapsulant. 6 is a perspective view illustrating an inner side surface of a supporter main on which a liquid crystal injection hole side of a liquid crystal panel is seated.

3 to 6, a liquid crystal display module according to an exemplary embodiment of the present invention includes a supporter main 110, a liquid crystal panel assembly 120 and a backlight unit 130 stacked inside the supporter main 110. And, the cover bottom 140 for wrapping the side and bottom of the supporter main 110 and the bottom of the backlight unit 130, the case for wrapping the edge of the liquid crystal panel assembly 120 and the side of the cover bottom 140 The tower 101 is provided.

The liquid crystal panel assembly 120 includes a liquid crystal panel 123 including upper and lower substrates 121 and 122, a liquid crystal layer (not shown), a spacer (not shown), and a sealant 124, and upper and lower polarizers 125 and 126. .

The upper substrate 121 of the liquid crystal panel 123 is formed with a color filter, a common electrode, a black matrix, and the like, which are not shown. In the lower substrate 122 of the liquid crystal panel 123, signal lines such as a data line and a gate line (not shown) are formed, and a thin film transistor (hereinafter referred to as TFT) is formed at the intersection of the data line and the gate line. ) Is formed. The TFT switches the data signal to be transmitted from the data line toward the liquid crystal cell in response to the scan signal (gate pulse) from the gate line. The pixel electrode is formed in the pixel region between the data line and the gate line. In addition, a pad region to which data lines and gate lines are connected is formed at one side of the lower substrate 122, and a driver integrated circuit for applying a driving signal to a TFT is mounted in the pad region. Tape Carrier Package is attached. The tape carrier package supplies the data signal to the data lines from the driver integrated circuit and the scan signal to the gate lines. A liquid crystal layer is sandwiched between the upper substrate 121 and the lower substrate 122, and a spacer is formed to maintain a constant gap therebetween. The upper substrate 121 and the lower substrate 122 are bonded by the sealant 124, and the upper polarizer 125 and the lower polarizer 126 are attached to the front and rear surfaces thereof, respectively. Here, the sealant 124 serves to define the liquid crystal injection space P and the liquid crystal region LC. The liquid crystal injection space P is an open area of the sealant 124 for liquid crystal injection, and induces liquid crystal injection between the upper and lower substrates 121 and 122 bonded by the sealant 124 under a pressurized environment. When the liquid crystal injection is completed, the liquid crystal injection space P is sealed by the encapsulant 128 to prevent external leakage of the injected liquid crystal.

The supporter main 110 is a mold, and the side wall surface thereof is formed into a stepped stepped surface, and the liquid crystal panel assembly 120 is seated using the stepped surface as a seating end. In detail, the mounting end of the supporter main 210 may include a seating portion 112a corresponding to an area (silent area SL) in which the liquid crystal injection hole P of the liquid crystal panel 123 is not formed, and the liquid crystal panel 123. The step part 112b corresponding to the area | region (open seal area) in which liquid crystal injection hole P was formed is provided. The mounting portion 112a is a liquid crystal region LC to prevent the liquid crystal region LC from being pressed by the mounting end 213 of the supporter main 210 when the liquid crystal panel assembly 120 is seated as shown in FIG. 4. In other words, the first height h1 is formed so as not to overlap the liquid crystal region LC. On the other hand, the stepped part 112b is formed at a second height h2 lower than the first height h1 as shown in FIG. 5 and spaced apart from the liquid crystal panel assembly 120 seated on the seating part 112a. The reason why the step portion 112b is formed lower than the mounting portion 112a is that the sealant 124 is not applied to the liquid crystal injection hole P side of the liquid crystal panel 123 as shown in FIGS. 3 and 5, and the liquid crystal region ( LC) takes its place. It is preferable that the interval Δh between the seating portion 112a and the stepped portion 112b shown in FIG. 6 be approximately 0.1 to 0.3 mm. If the distance Δh between the seating portion 112a and the stepped portion 112b is less than 0.1 mm, the seated liquid crystal panel assembly 120 and the stepped portion 112b of the supporter main 110 may come into contact with each other. This is because there is a possibility of light leakage through this interval Δh when the interval Δh between the seating portion 112a and the stepped portion 112b exceeds 0.3 mm. Therefore, the more preferable spacing (DELTA) h between the mounting part 112a and the step part 112b is about 0.2 mm. By changing the mounting end structure of the supporter main 110, the liquid crystal layer held in the edge region of the liquid crystal panel 123 is free from the mounting end pressing phenomenon of the supporter main 110. Although not shown, the backlight unit 130 irradiating light to the liquid crystal panel assembly 120 may also be fixed after being seated on another inner sidewall surface of the supporter main 110.

The backlight unit 130 may include a light source assembly (not shown) for generating light, a light guide plate 134 for converting light incident from the light source assembly into a surface light source, and a reflector plate 136 disposed on a rear surface of the light guide plate 134. And an optical sheet 135 stacked on the light guide plate 134.

Light sources constituting the light source assembly include a cold cathode fluorescent lamp (CCFL), a hot cathode fluorescent lamp (HCFL), an external electrode fluorescent lamp (EEFL), and a light emitting diode (Light). Emitting Diode (LED), and may be preferably a light emitting diode (LED). The light source assembly is driven by the driving power applied to generate light, and the generated light is incident on the light guide plate 134. For this purpose, although not shown, the light source assembly is fixedly supported between the light guide plate 134 and some of the stepped stepped surfaces of the supporter main 110.

The light guide plate 134 converts the line light source incident from the light source assembly to a surface light source by reaching a distance far from the light source assembly through its internal reflection, and guides the light source to the liquid crystal panel assembly 120. A printed pattern is provided on the inner lower surface of the light guide plate 134 so that the light beam passing through the incident surface is reflected at a predetermined inclination angle from the inner lower surface which is the inclined surface and is directed toward the exit surface. The light guide plate 134 is generally formed of polymethylmethacrylate (PMMA) having high strength and not easily being deformed or broken and having good transmittance. The rear side of the light guide plate 134 is provided so that the reflecting plate 136 faces.

The reflector 136 serves to reduce light loss by reflecting light incident to itself through the rear surface of the light guide plate 134 toward the light guide plate 134. When light from the light source assembly is incident on the light guide plate 134, the light traveling to the rear surface of the light guide plate 134 is reflected by the reflector plate 136 to travel toward the exit surface of the light guide plate 134.

When the light incident on the liquid crystal panel 123 is vertical, the light efficiency is increased. The optical sheet 135 generates light emitted from the light guide plate 134 vertically to improve light efficiency. To this end, the optical sheet 135 includes a diffusion sheet for diffusing the light emitted through the exit surface of the light guide plate 134 to the entire area of the liquid crystal panel 123, and an advancing angle of the light emitted from the light guide plate 134. Prismatic sheet to be perpendicular to the 123, and a protective sheet for protecting the prism sheet and the like.

The light blocking tape 138 is attached to one edge of the optical sheet 135 and the mounting portion 112a of the supporter main 110 to prevent leakage of light generated from the light source assembly.

The cover bottom 140 includes a flat portion and a side portion that are vertically bent to surround one bottom and side surfaces of the supporter main 110 and one bottom surface of the reflector plate 136. A screw hole through which a screw (not shown) penetrates is formed in the side portion of the cover bottom 140. The cover bottom 140 is fastened to the supporter main 110 through a screw. The cover bottom 140 may be formed of a metal material, for example, aluminum.

The case top 101 is formed in a rectangular band shape having a flat portion and a side portion bent at right angles to surround one side edge and side surfaces of the liquid crystal panel 123 and the cover bottom 140. The case top 101 protects the liquid crystal panel 123 from external impact by wrapping the edge of the liquid crystal panel 123. The case top 101 is fastened to the supporter main 110 by a screw (not shown).

As described above, the liquid crystal display module according to the embodiment of the present invention is formed at a first height so as not to overlap with the liquid crystal region in response to a region where the liquid crystal injection hole of the liquid crystal panel is not formed, in order to induce mounting of the liquid crystal panel assembly. The mounting end is formed by a step portion formed with a seating portion and a second height lower than the first height corresponding to the region where the liquid crystal injection hole of the liquid crystal panel is formed, and the liquid crystal layer sandwiched by the edge region of the liquid crystal panel is mounted on the supporter main. By preventing it from being pressed by, the occurrence of ripple in the edge region of the liquid crystal panel is suppressed.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

1 is a plan view of a liquid crystal display module employing a conventional edge type backlight unit.

FIG. 2 is a cross-sectional view of FIG. 1 taken along line II ′. FIG.

3 is a plan view showing a liquid crystal display module according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of FIG. 3 taken along II-II '.

5 is a plan view showing a liquid crystal display module according to another embodiment of the present invention.

FIG. 6 is a cross-sectional view of FIG. 5 taken along line III-III '.

<Description of Symbols for Main Parts of Drawings>

101: case top 110: supporter main

112a: seating portion 112b: stepped portion

120: liquid crystal panel assembly 121: upper substrate

122: lower substrate 123: liquid crystal panel

124: sealant 125: upper polarizer

126: lower polarizer 130: backlight unit

134: light guide plate 135: optical sheet

136: reflector 138: shading tape

140: cover bottom

Claims (4)

A liquid crystal panel having first and second substrates, a sealant having an open area for injecting liquid crystals and bonding the substrates, and a liquid crystal layer injected between the bonded substrates through the sealant open area; And A supporter main for mounting the liquid crystal panel using a stepped surface formed on an inner sidewall surface as a mounting end; The seating end is formed to a first height avoiding a region in which the liquid crystal layer is present, and a seating portion for inducing mounting of the liquid crystal panel, and a second height overlapping the sealant open area and lower than the first height. And a stepped portion spaced apart from the liquid crystal panel seated at a predetermined interval. The method of claim 1, And the seating part is formed to overlap the area where the sealant is applied. The method of claim 1, The gap between the seating portion and the stepped portion is a liquid crystal display module, characterized in that 0.1mm ~ 0.3mm. The method of claim 3, wherein Liquid crystal display module characterized in that the interval between the seating portion and the step portion is 0.2mm.

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