KR20090131583A - Liquid crystal display module - Google Patents

Abstract

PURPOSE: A liquid crystal display module with a mounting terminal for a liquid crystal panel is provided to prevent a liquid crystal layer narrowed in the edge area of the liquid crystal panel from being pressed by the mounting terminal of a supporter main, thereby suppressing ripples in the edge area of the liquid crystal panel. CONSTITUTION: A sealant(124) bonds the first and second substrates(121,122). A liquid crystal layer is inserted between the bonded substrates. A supporter main(110) uses a stepped surface formed in the sidewall of the inside as a mounting terminal to mount a liquid crystal panel. The mounting terminal(113) comprises a mounting unit(111) and a stepped unit(112). The mounting unit is overlapped with the region in which the sealant is applied and guides the mounting of the liquid crystal panel. The stepped unit is overlapped with the region in which the liquid crystal layer is formed and is lower than the mounting portion.

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 30 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 30 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, according to an embodiment of the present invention, a liquid crystal display module having a backlight unit includes a liquid crystal sandwiched between first and second substrates, a sealant for bonding the substrates, and the bonded substrates. A liquid crystal panel having a layer; 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 overlapped with the sealant-coated area and formed to a first height to induce mounting of the liquid crystal panel, and a second height overlapping with the area where the liquid crystal layer is formed and lower than the first height. And a step portion spaced apart from the liquid crystal panel formed at a predetermined interval.

The stepped portion is formed by extending a predetermined gap toward the seating portion corresponding to the sealant coated region.

The constant gap is 0.1 to 0.2 mm.

The step gap between the seating portion and the step portion is smaller than the thickness of the optical sheet constituting the backlight unit.

The step gap between the seating part and the step part is 0.1 to 0.2 mm.

The liquid crystal display module according to the present invention is formed so as to step the seating end of the supporter main 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, Ripple occurrence can be suppressed.

Furthermore, the liquid crystal display module according to the present invention is formed so as to step the seating end of the supporter main without changing the structure (area) of the light guide plate 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. By doing so, it is possible to effectively suppress the occurrence of ripple in the edge region of the liquid crystal panel while maintaining the light guide plate efficiency to the maximum.

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. 4 is a cross-sectional view taken along the line II-II 'of FIG. 3. In FIG. 4, '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.

3 and 4, the 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. ), A cover bottom 140 to surround the side and bottom of the supporter main 110 and a bottom of the backlight unit 130, and an edge of the liquid crystal panel assembly 120 and a side of the cover bottom 140. The case top 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 respectively connected is formed at one side of the lower substrate 122, and a tape not shown in which a driver integrated circuit for applying a driving signal to a TFT is mounted on the pad region. A 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.

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 113 as a seating end 113. Specifically, the mounting end 113 of the supporter main 110 is a mounting portion 111 formed at a first height h1 for mounting the liquid crystal panel assembly 120, and when the liquid crystal panel assembly 120 is seated. In order to prevent the liquid crystal region LC from being pressed by the seating end 113 of the supporter main 110, the stepped part 112 is formed to have a second height h2 lower than the first height h1. . The stepped portion 112 is formed in the region A overlapping the liquid crystal region LC. In consideration of the work tolerance, the first gap g1, that is, toward the seating portion 111 corresponding to the sealant region SL, It may be formed to extend by 0.1 ~ 0.2mm. The gap between the seating portion 111 and the stepped portion 112 is about a second gap g2 smaller than the thickness of the optical sheet 135, that is, about 0.1 to 0.2 mm to prevent the flow of the optical sheet 135. It is preferable to. As such, the liquid crystal layer held in the edge area A of the liquid crystal panel 123 due to the step of the mounting end 113 of the supporter main 110 is not affected by the pressing of the mounting end 113 of the supporter main 110. Will not. 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 light guide plate 134 disposed under the light guide plate 134. And a reflecting plate 136 for reflecting the light traveling toward the lower surface and the side toward the upper surface, and an optical sheet 135 for controlling the diffusion and propagation direction of the light passing through 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 reaches light far from the light source assembly through its internal reflection through the light incident from the light source assembly. 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 the light from the light source assembly is incident on the light guide plate 134, the light traveling toward the lower surface and the side 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.

The light emitted through the exit surface of the light guide plate 134 is controlled by the optical sheet 135 to diffuse and travel. 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. 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 111 of the supporter main 110 to prevent leakage of light generated from the light source assembly.

The cover bottom 140 is installed to surround one bottom and side surfaces of the supporter main 110 and one bottom surface of the reflector plate 136. The cover bottom 140 may be formed of a metal material, for example, aluminum.

The case top 101 is installed 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.

As described above, the liquid crystal display module according to the exemplary embodiment of the present invention is formed such that the mounting end 113 of the supporter main 110 is stepped so that the liquid crystal layer held in the edge region A of the liquid crystal panel 123 is supported. By preventing it from being pressed by the mounting end 113 of the main 110, ripple generation in the edge area A of this liquid crystal panel 123 is suppressed.

In addition, the liquid crystal display module according to the exemplary embodiment of the present invention is formed so as to step the seating end 113 of the supporter main 110 without changing the structure (area / width) of the light guide plate 134 so that the edge of the liquid crystal panel 123 is fixed. By preventing the liquid crystal layer held in the area from being pressed by the seating end 113 of the supporter main 110, ripple generation in the edge area of the liquid crystal panel 123 is maintained while maximizing the light guide plate 134 efficiency. It can be effectively suppressed.

5 is a plan view illustrating a liquid crystal display module according to another exemplary embodiment of the present invention. FIG. 6 is a cross-sectional view of FIG. 5 taken along line III-III '. In FIG. 6, '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.

5 and 6, a liquid crystal display module according to another embodiment of the present invention includes a supporter main 210, a liquid crystal panel assembly 120 and a backlight unit 230 stacked inside the supporter main 210. ), A cover bottom 140 to surround the side and bottom of the supporter main 210 and a bottom of the backlight unit 230, and an edge of the liquid crystal panel assembly 120 and a side of the cover bottom 140. The case top 101 is provided.

Since the case top 101, the liquid crystal panel assembly 120, and the cover bottom 140 are substantially the same as those shown in FIG. 4, the same reference numerals are given to those of FIG. 4, and detailed description thereof will be omitted. Let's do it. The light shielding tape 138, the optical sheet 135 and the reflecting plate 136 constituting the backlight unit 230 are substantially the same as those of the backlight unit 130 shown in FIG. The same reference numerals as in FIG. 4 are used, and detailed description thereof will be omitted.

The supporter main 210 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 the seating end 213. In detail, the mounting end 213 of the supporter main 210 may 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. The width W is reduced so as not to correspond to the area LC. Here, the mounting end 213 of the supporter main 210 may be further reduced by a third gap g3, that is, 0.1 to 0.2 mm, toward the sealant area SL in consideration of a work tolerance. In this way, the liquid crystal layer held in the edge region of the liquid crystal panel 123 by the reduction in the width W of the mounting end 213 of the supporter main 210 is influenced by the pressing phenomenon of the mounting end 213 of the supporter main 210. Will not receive.

The light guide plate 234 transmits the light incident from the light source assembly to a distance far from the light source assembly through its internal reflection. The light guide plate 234 is generally formed of polymethylmethacrylate (PMMA) having high strength and not easily being deformed or broken and having good transmittance. The width of the light guide plate 234 becomes larger as the width of the seating end 213 of the supporter main 210 is reduced. That is, the width of the light guide plate 234 is increased by about 4 mm, that is, about 1.1 mm on one side of the light guide plate 234.

As described above, the liquid crystal display module according to another embodiment of the present invention reduces the width of the mounting end 113 of the supporter main 210 so as not to correspond to the liquid crystal region LC so that the liquid crystal layer is seated on the supporter main 210. By not pressing by the end 213, ripple generation in the edge region of the liquid crystal panel 123 is suppressed. However, in the liquid crystal display module according to another embodiment of the present invention, as the width of the seating end 213 of the supporter main 210 is reduced, the width of the light guide plate 234 is increased to one side to be generated from the backlight unit 230. There is a disadvantage in that the brightness of the light falls approximately 2-3%.

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

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 (5)

In the liquid crystal display module having a backlight unit, A liquid crystal panel having first and second substrates, a sealant for bonding the substrates, and a liquid crystal layer sandwiched between the bonded substrates; 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 overlapped with the sealant-coated area and formed to a first height to induce mounting of the liquid crystal panel, and a second height lower than the first height and overlapping with the area where the liquid crystal layer is formed. And a stepped portion spaced apart from the liquid crystal panel formed and seated at predetermined intervals. The method of claim 1, And the stepped portion is formed by extending a predetermined gap toward the seating portion corresponding to the sealant coated region. The method of claim 2, The predetermined gap is a liquid crystal display module, characterized in that 0.1 ~ 0.2㎜. The method of claim 1, And a step gap between the seating part and the step part is smaller than a thickness of the optical sheet constituting the backlight unit. The method of claim 4, wherein And a step gap between the seating part and the step part is 0.1 to 0.2 mm.

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