KR20100062589A - Liquid crystal display module - Google Patents

Abstract

The present invention relates to a liquid crystal display module to reduce the width of the bezel area.

The liquid crystal display module includes a liquid crystal panel including a first substrate, a first polarizer attached to the first substrate, a second substrate bonded to the first substrate, and a second polarizer attached to a portion of a rear surface of the second substrate. assembly; A supporter main positioned below the liquid crystal panel assembly and supporting the second polarizing plate by using a flat upper surface; And a backlight unit supported on the inner sidewall of the supporter main to irradiate light to the liquid crystal panel assembly; The outer surface of the supporter main perpendicular to the upper surface protrudes by a predetermined gap with respect to the outermost edge surface of the liquid crystal panel assembly.

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 reduce the width of the bezel area.

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.

The flat panel display includes a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), and an electro-luminescence (EL). And most of them are commercially available and commercially available.

Among these, in particular, liquid crystal display devices tend to be gradually widened due to their light weight, thinness, and low power consumption. According to this trend, liquid crystal displays are being 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 form. The liquid crystal display is rapidly developing in size and high resolution due to the recent mass production technology and R & D.

In general, a liquid crystal display device 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. The liquid crystal panel and the backlight unit are fastened in an integrated form to prevent light loss and are protected by a set cover for the liquid crystal display device so as not to be damaged by an external impact.

The backlight unit of the liquid crystal display module is roughly divided into a direct type and an edge type. In the edge type method, a light source is disposed outside the flat plate and light is incident on 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 taken along line II ′ of FIG. 1. 1 and 2, "BA" represents a bezel area and "AA" represents an active display area, respectively.

1 and 2, a 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.

The liquid crystal panel assembly 20 includes a liquid crystal panel 23 including an upper substrate 21 and a lower substrate 22, an upper polarizer 25 and a sewer polarizer 26 attached to the liquid crystal panel 23. . A 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 a sealant, and an upper polarizer 25 and a lower polarizer 26 are attached to the front surface of the upper substrate 21 and the rear surface of the lower substrate 22, respectively. .

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. The guide wall 12 constituting the stepped step surface serves to guide the mounting of the liquid crystal panel assembly 20. In order to protect the liquid crystal panel assembly 20 from external impact, the guide wall 12 is spaced by a predetermined gap G with respect to the outermost edge surface of the liquid crystal panel 23. The backlight unit 30 irradiating light to the liquid crystal panel assembly 20 is also fixed to the supporter main 10 after being seated.

The backlight unit 30 includes a light guide plate 32, a reflector 34, optical sheets 36, and a light blocking member 38, including a light source assembly (not shown).

However, in the conventional LCD, since the thickness W of the guide wall 12 occupies approximately 35% of the bezel area BA, it serves as a big obstacle in reducing the bezel area BA. For this reason, it is difficult to meet the recent trend of conventional liquid crystal display modules becoming more and more compact.

Accordingly, an object of the present invention is to provide a liquid crystal display module to reduce the bezel area.

In order to achieve the above object, a liquid crystal display module according to an embodiment of the present invention is a first substrate, a first polarizing plate attached on the first substrate, a second substrate and the second substrate bonded to the first substrate and the second substrate A liquid crystal panel assembly including a second polarizing plate attached to a portion of a rear surface thereof; A supporter main positioned below the liquid crystal panel assembly and supporting the second polarizing plate by using a flat upper surface; And a backlight unit supported on the inner sidewall of the supporter main to irradiate light to the liquid crystal panel assembly; The outer surface of the supporter main perpendicular to the upper surface may protrude by a predetermined gap with respect to the outermost edge of the liquid crystal panel assembly.

The liquid crystal display module may further include a plurality of guide protrusions protruding from an edge of the upper surface in a space between the rear surface of the second substrate on which the second polarizing plate is not attached and the upper surface.

A light blocking member is interposed between the upper surface and the second polarizing plate.

The height of the guide protrusion may be greater than the thickness of the light blocking member and smaller than the sum of the thickness of the light blocking member and the thickness of the lower polarizing plate.

The guide protrusion may be separately mounted to the supporter main or integrally molded to the supporter main.

Instead of removing the guide wall for guiding the liquid crystal panel assembly during assembly, the liquid crystal display module according to the present invention has a plurality of guide protrusions located along the upper edge of the supporter main, thereby eliminating misalignment in the assembling process. The width of the region can be reduced by the width occupied by the conventional guide protrusion.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 3 to 5.

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. 5 is a plan view of the liquid crystal display module for explaining the position where the guide protrusion is formed. In FIG. 4, "BA" represents a bezel area, and "AA" represents an active display area, respectively.

3 to 5, 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 stacked on the supporter main 110, and a supporter main 110. The backlight unit 130 is stacked on the supporter main 110 is provided with a guide protrusion 112 for aligning the liquid crystal panel assembly 120 and the backlight unit 130.

The liquid crystal panel assembly 120 includes an upper substrate 121, a lower substrate 122, a liquid crystal panel 123 including a liquid crystal layer, a spacer, and a sealant, an upper polarizer 125, and a lower polarizer 126.

A color filter, a common electrode, a black matrix, and the like are formed on the upper substrate 121 of the liquid crystal panel 123. Signal lines such as data lines and gate lines are formed on the lower substrate 122 of the liquid crystal panel 123, and thin film transistors (hereinafter referred to as TFTs) are formed at the intersections of the data lines and the gate lines. do. 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 driver integrated circuit 124 for applying a driving signal to the TFT is formed in the pad region. On Glass). The pad electrodes of the driver integrated circuit 124 are connected to a flexible printed circuit (FPC) via an anisotropic conductive film (ACF) to receive driving signals from a printed circuit board (PCB). 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. The upper polarizer 125 is attached to the front surface of the upper substrate 121, and the lower polarizer 126 is attached to the rear surface of the lower substrate 122.

The supporter main 110 uses the flat upper surface 110a as mold water and the stepped surface 110b forming an inner sidewall to light the liquid crystal panel assembly 120 together with the liquid crystal panel assembly 120. The backlight unit 130 to be irradiated is laminated. Specifically, the liquid crystal panel assembly 120 is supported on the upper surface 110a of the supporter main 110, and the backlight unit 130 is supported on the stepped surface 110b of the supporter main 110. The outer surface 110c perpendicular to the upper surface 110a of the supporter main 110 protrudes outwardly by the impact protection gap G with respect to the outermost edge surface of the liquid crystal panel 123. The supporter main 110 of the present invention does not require a guide wall for stacking the liquid crystal panel, unlike the related art. Therefore, according to the present invention, the width of the bezel area BA can be reduced by the thickness of the guide wall compared with the conventional method.

The backlight unit 130 includes a light source assembly for generating light, a light source FPC attached to the light source assembly to supply driving power from the outside, a light guide plate 132 for converting light incident from the light source assembly into a surface light source, A reflector plate 134 positioned under the light guide plate 132 to reflect light traveling toward the bottom and side surfaces of the light guide plate 132 toward the upper surface; and optical sheets for controlling the diffusion and propagation direction of light through the light guide plate 132. 136 and a light shielding member 138 for preventing unnecessary leakage of light.

Light sources constituting the light source assembly include a cold cathode fluorescent lamp (CCFL), a hot cathode fluorescent lamp (HCFL), an external external fluorescent lamp (EEFL) and a light emitting diode (EEFL). Light Emitting Diode (LED) may be any one, and preferably, a light emitting diode (LED) may be used. The light source assembly is driven by the driving power supplied from the light source FPC to generate light and to inject the generated light into the light guide plate 132.

The light guide plate 132 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 132 is generally formed of polymethylmethacrylate (PMMA), which has high strength and is not easily deformed or broken and has good transmittance. The rear side of the light guide plate 132 is provided so that the reflecting plate 134 faces.

The reflective plate 134 is fixed to the stepped surface 110b of the supporter main 110 to support the light guide plate 132. The reflector 134 serves to reduce light loss by reflecting light incident to itself through the rear surface of the light guide plate 132 toward the light guide plate 132. Light incident on the light guide plate 132 from the light source assembly is reflected at a predetermined inclination angle in the light guide plate 132 so as to uniformly travel toward the exit surface of the light guide plate 132. At this time, the light traveling to the lower surface and the side surface of the light guide plate 132 is reflected back to the reflecting plate 134 and proceeds toward the exit surface.

The optical sheets 136 are diffused sheets for diffusing the light emitted through the exit surface of the light guide plate 132 to all regions, and the traveling angle of the light emitted from the light guide plate 132 is perpendicular to the liquid crystal panel 123. And a protective sheet for protecting the prism sheet. Through this, the optical sheets 136 increase the light efficiency irradiated to the liquid crystal panel assembly 120.

The light blocking member 138 is attached to the upper edge of the topmost optical sheet of the optical sheets 136 and the edge of the top surface 110a of the supporter main 110 so that light generated from the light source assembly leaks into the bezel area BA. To prevent them. The light blocking member 510 may be any one as long as it can shield light with a thin thickness such as a black tape or a black film.

The guide protrusion 112 protrudes from an edge of the upper surface 110a of the supporter main 110 and is positioned in a space between the upper surface 110a and the lower substrate 122. The guide protrusion 112 serves to prevent misalignment between the liquid crystal panel assembly 120 and the backlight unit 130, which may occur in the assembly process due to the removal of the guide wall. To this end, a plurality of guide protrusions 112 are formed along the edge of the upper surface 110a of the supporter main 110 as shown in FIG. 5. The guide protrusion 112 may be separately mounted to the supporter main 110 or may be integrally formed with the supporter main 110. The protruding height H1 of the guide protrusion 112 is greater than the thickness of the light blocking member 138 and the space height H2 between the upper surface 110a of the supporter main 110 and the lower substrate 122, that is, the light blocking member ( 138 is less than the sum of the thickness of the lower polarizer 126.

As described above, the liquid crystal display module according to the present invention has a plurality of guide protrusions located along the top edge of the supporter main, instead of removing the guide wall for guiding the liquid crystal panel assembly during assembly, Without the misalignment, the width of the bezel area can be reduced by the width occupied by the conventional guide protrusion.

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 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 '.

5 is a plan view of a liquid crystal display module for explaining a position where the guide protrusion is formed.

<Description of Symbols for Main Parts of Drawings>

110: main supporter 112: guide projection

120: liquid crystal panel assembly 121: upper substrate

122: lower substrate 123: liquid crystal panel

125,126 polarizer 130: backlight unit

132: light guide plate 134: reflector

136: optical sheets 138: light blocking member

Claims (5)

A liquid crystal panel assembly including a first substrate, a first polarizer attached to the first substrate, a second substrate bonded to the first substrate, and a second polarizer attached to a portion of a rear surface of the second substrate; A supporter main positioned below the liquid crystal panel assembly and supporting the second polarizing plate by using a flat upper surface; And A backlight unit supported on the inner sidewall of the supporter main to irradiate light to the liquid crystal panel assembly; The outer surface of the supporter main perpendicular to the upper surface protrudes by a predetermined gap with respect to the outermost edge of the liquid crystal panel assembly. The method of claim 1, And a plurality of guide protrusions protruding from an edge of the upper surface in a space formed between the rear surface of the second substrate to which the second polarizing plate is not attached and the upper surface. The method of claim 2, And a light blocking member interposed between the upper surface and the second polarizing plate. The method of claim 3, wherein The height of the guide projection is greater than the thickness of the light blocking member, the liquid crystal display module, characterized in that less than the sum of the thickness of the light blocking member and the thickness of the lower polarizing plate. The method of claim 3, wherein And the guide protrusion is separately attached to the supporter main or integrally formed in the supporter main.

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