KR20070002876A - Liquid crystal display device module - Google Patents

Abstract

An LCD module is provided to minimize a contact area between a light guide plate and a support main by forming a plurality of protrusions on an inner sidewall of the support main contacting the light guide plate. A lamp(120) generates a light beam. The lamp is mounted at a lamp housing(118). A light guide plate(106) is disposed at a side of the lamp, converts light incident from the lamp to a surface light source, and guides the surface light source toward the liquid crystal panel. A support main has an inner sidewall molded as a stepped surface, receives the liquid crystal panel, the lamp, the lamp housing and the light guide plate, and includes first, second and third sidewalls facing the light guide plate. At least one protrusion(102) is formed at each of the first, second and third sidewalls, and has a gentle curvature. The protrusion has a ratio of height to width of 3:100 or more. A height of the protrusion is 0.3 mm, and a width thereof is 10 mm or more.

Description

Liquid Crystal Display Module {LIQUID CRYSTAL DISPLAY DEVICE MODULE}

1 is a perspective view showing the configuration of a conventional liquid crystal display module.

Figure 2a is a perspective view showing a part of a liquid crystal display module according to the present invention.

FIG. 2B is an enlarged view of region I of FIG. 2A

FIG. 2C is a cross-sectional view of the liquid crystal display module taken along the line II-II ′ of FIG. 2A.

*** Description of the major symbols in the drawings ***

2, 102: support main 102 ': protrusion

102a, 102b, 102c: first, second and third sidewall surfaces

6, 106: light guide plate 106a, 106b, 106c: side surface of the light guide plate

h: height w: width

The present invention relates to a liquid crystal display module, and more particularly, to a liquid crystal display module capable of preventing mechanical noise between the support main and the light guide plate and preventing light leakage between the support main and the light guide plate.

In general, a flat panel display may be classified into a light emitting flat panel display and a light receiving flat panel display. A flat panel display includes a flat cathode ray tube, a plasma display panel, an electroluminescent device, and a fluorescent display. And light emitting diodes, and the like, and the light receiving type flat panel display includes a liquid crystal display module.

Since the liquid crystal display module itself does not emit light to form an image, a backlight unit is provided on a rear surface thereof to display an image even in a dark place.

General requirements of the backlight unit for liquid crystal display modules include high brightness, high efficiency, uniformity of brightness, long life, thinness, low weight and low cost, and high efficiency long life lamps are required for notebook computers to reduce power consumption. The dragon backlight unit requires high brightness.

FIG. 1 is an exploded perspective view illustrating a configuration of a conventional general liquid crystal display module. As shown in the drawing, a liquid crystal display module includes a liquid crystal panel 10 in which pixels are arranged in a matrix form, and a side surface of the liquid crystal panel 10. And a gate unit 50 and a data driver 52 connected to each other, and a backlight unit 60 disposed on the rear surface of the liquid crystal panel 10 to irradiate light.

The liquid crystal panel 10 includes a thin film transistor array substrate and a color filter substrate bonded together to maintain a uniform cell-gap opposite to each other, and a liquid crystal layer formed at a distance between the color filter substrate and the thin film transistor array substrate.

A common electrode and a pixel electrode are formed on the liquid crystal panel where the thin film transistor array substrate and the color filter substrate are bonded to apply an electric field to the liquid crystal layer. That is, when the voltage of the data signal applied to the pixel electrode is controlled while the voltage is applied to the common electrode, the liquid crystal of the liquid crystal layer rotates by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode. By adjusting the transmittance of light for each pixel, a character or an image is displayed.

On the other hand, in order to control the voltage of the data signal applied to the pixel electrode for each pixel, switching elements such as thin film transistors are separately provided in the pixels.

The gate driver 50 and the data driver 52 are combined with the liquid crystal panel 10 in various forms to supply scan signals and image information to gate lines and data lines formed in the liquid crystal panel 10, thereby providing liquid crystals. The pixels of the panel 10 are driven.

The backlight unit 60 may include a lamp 20 for generating a light beam, a lamp housing 18 surrounding the lamp 20, and a light guide plate for guiding the light beam generated by the lamp 20 toward the liquid crystal panel 10. 6) and a reflector 4 provided on the bottom and side surfaces of the light guide plate 6 to guide the light beam generated by the lamp 20 to the liquid crystal panel 10. In addition, various patterns of the optical sheet 12 for scattering and reflecting light may be additionally attached or engraved thereon to emit light beams trapped inside the LGP 6 to the outside due to the incident critical angle.

In addition, the liquid crystal panel 10 and the backlight unit 60 are wrapped by the support main 2, and the rear surfaces of the wrapped liquid crystal panel 10 and the backlight unit 60 are supported by the lower cover 14. do. The lower cover 14 includes a flat portion and a side portion that are vertically bent to surround the bottom and side surfaces of one side of the support main 2. In addition, the top case 16 is combined with the support main 2 to surround the edge of the liquid crystal panel 10 and the lower cover 14. The top case 16 has a flat portion and a side portion bent at right angles. It is manufactured in the form of a square band to fix the support main (2) and the liquid crystal panel (10).

On the other hand, in the conventional liquid crystal display module configured as described above, since the support main is in surface contact with the light guide plate to support the light guide plate, the contact area between the light guide plate and the support main is increased, and when friction occurs due to torsion between the light guide plate and the support main, The distance had a problem that the mechanical noise occurs badly.

In particular, when the liquid crystal display module is used as a portable product, the components of the liquid crystal display module may not be fixed to a certain position by external force, and flow as the user moves the position. Due to the change in the position of the liquid crystal display module components, the possibility that the support main and the light guide plate collide with each other increases, and thus mechanical noise of the liquid crystal display module is further increased.

Accordingly, the present invention has been made to solve the above problems, by forming a plurality of protrusions on the inner side wall surface of the support main in contact with the light guide plate to minimize the contact area between the light guide plate and the support main, thereby the light guide plate and the support main It is an object of the present invention to provide a backlight unit and a liquid crystal display module using the same that can prevent mechanical noise caused by friction therebetween.

In addition, the present invention is formed by a gentle inclined portion having a ratio of height to width of 3: 100 or more, by minimizing the gap between the light guide plate and the support main, it is possible to prevent the light leakage occurs in the gap. Another object is to provide a liquid crystal display module.

Other objects and features of the present invention will be described in the configuration and claims of the invention described below.

Therefore, for the above purpose, the liquid crystal display module according to the present invention, a liquid crystal panel; A lamp for generating a light beam; A lamp housing equipped with the lamp; A light guide plate disposed at a side of the lamp to convert light incident from the lamp into a surface light source and to guide the surface light source toward the liquid crystal panel; And a support main having an inner side wall formed into a stepped step surface to seat the liquid crystal panel, the lamp, the lamp housing and the light guide plate, and defining first, second and third side wall surfaces facing the light guide plate. And at least one protrusion formed on each of the first, second, and third sidewall surfaces, the protrusion having a moderate curvature, wherein the protrusion has a height to width ratio of 3: 100 or more. Characterized in that formed.

The liquid crystal display module may include an optical sheet attached to an upper portion of the light guide plate to increase light efficiency incident to the liquid crystal panel; A reflection plate attached to a rear surface and a side surface of the light guide plate to reflect light emitted to the rear surface of the light guide plate to the liquid crystal panel; A lower cover surrounding one bottom and a side of the support main; And a top case surrounding the edge and the lower cover of the liquid crystal panel.

The liquid crystal panel may include a thin film transistor array substrate and a color filter substrate which are bonded to face each other so that a uniform cell gap is maintained; A liquid crystal layer formed in a space between the thin film transistor array substrate and the color filter substrate; A common electrode and a pixel electrode for driving the liquid crystal of the liquid crystal layer; And a switching device for switching the common electrode and the pixel electrode.

Hereinafter, a liquid crystal display module according to the present invention will be described in detail with reference to the accompanying drawings.

2A is a perspective view illustrating a portion of a liquid crystal display module according to an exemplary embodiment of the present invention, and FIG. 2B is a cross-sectional view illustrating a cross section of the liquid crystal display module taken along line II ′ of FIG. 2A.

First, as shown in FIG. 2A, the liquid crystal display module according to the present invention includes a lamp 120 generating a light beam, a 'c' shaped lamp housing 118 on which the lamp 120 is mounted, and The light guide plate of the wedge-shaped structure is disposed on the side of the lamp 120, converts the light incident from the lamp 120 into a surface light source, and gradually becomes thinner to guide the surface light source toward the liquid crystal panel 110 ( 106).

In addition, the light guide plate 106, the lamp 120, and the support housing 102 formed with a stepped step surface are formed on the outside of the lamp housing 118, and the light guide plate 106 and the lamp are provided. 120 and the lamp housing 118 are seated.

On the other hand, the first, second and third sidewall surfaces 102a, 102b, 102c on the support main 102 opposite to the first, second and third side surfaces 106a, 106b, 106c of the light guide plate 106. Each of the projections having at least one smooth curvature is formed on the N) to minimize the contact area between the support main 102 and the light guide plate 106.

That is, the first, second, and third side surfaces 106a, 106b, 106c of the light guide plate 106 and the first, second, and third sidewall surfaces 102a, 102b, 102c of the support main 102 are transferred to the front side. In order to prevent direct contact over the area, the support is formed by forming at least one projection 102 'in each of the first, second and third sidewall surfaces 102a, 102b, 102c of the support main 102. The main 102 and the light guide plate 106 do not make surface contact but make point contact or line contact.

The protrusion 102 ′ has a cross section, for example, in the form of an embossing, and makes contact with the light guide plate 106 at the top of the embossing.

As a result, the liquid crystal display module according to the present invention forms a plurality of protrusions 102 ′ on the sidewall surfaces 102a, 102b, 102c of the support main 102, thereby contacting the support main 102 with the light guide plate 106. By minimizing the area, it is possible to prevent mechanical noise generated by friction between the support main 102 and the light guide plate 106.

FIG. 2B is an enlarged view of region I of FIG. 2A and shows an enlarged view of one protrusion 102 ′ according to the present invention.

As shown in the figure, the protrusion 102 'of the present invention is formed such that its height (h) to width (w) has a ratio of 3: 100 or more, so that the protrusion 102' is supported from the support main 102. The shape is formed so that a gentle inclination is made between the region where the c) starts and the top of the projection 102 '. For example, when the height h of the protrusion 102 'is formed to be 0.3 mm, the width w is formed to be at least 10 mm or more.

This is for minimizing a gap formed between the light guide plate 106 and the support main 102 to prevent light leakage from occurring in the gap.

Substantially, when the ratio of the width w to the height h of the protrusion 102 'is less than 33.3, the gap area between the light guide plate 106 and the support main 102 increases, through the gap. Light leakage becomes remarkable, and uneven brightness is realized on the liquid crystal display module, thereby deteriorating the appearance of the liquid crystal display module.

Therefore, in the liquid crystal display module according to the present invention, the protrusions 102 'formed on the first, second, and third sidewall surfaces 102a, 102b, and 102c of the support main 102 have the smoothest curvature. It is possible to prevent the defects such as light leakage from occurring.

FIG. 2C is a cross-sectional view of the liquid crystal display module taken along the line II-II 'of FIG. 2A. In addition to the structure shown in FIG.

As shown in the figure, the liquid crystal display module includes a support main 102 and a backlight unit 160 and a liquid crystal panel stacked in the support main 102 and covered by the support main 102. 110, a bottom cover 114 surrounding the bottom and side of one side of the support main 102, and a top case surrounding the edge and the bottom cover 114 of the liquid crystal panel 110 ( 116.

The support main 102 has an inner sidewall surface formed into a stepped stepped surface, and the innermost layer has an optical sheet 112 and a lamp housing including a reflecting plate 104, a light guide plate 106, a diffusion sheet and a prism sheet. A backlight unit 160 including (not shown) is mounted, and a liquid crystal panel 110 having upper and lower polarizers 122 and 124 attached thereto is stacked thereon.

The optical sheets 112 are attached to the upper part of the light guide plate 106 to increase the light efficiency incident toward the liquid crystal panel 110, and the reflecting plate 104 is attached to the rear and side surfaces of the light guide plate 106 to The light emitted to the rear surface is reflected to the liquid crystal panel 110.

The light guide plate 106 may be formed using a transparent optical resin, mainly a PMMA resin called acryl, and is manufactured by injection molding, and the light generated from the lamp is incident on the side of the light guide plate 106, thereby providing optical It is emitted to the liquid crystal panel 110 via the sheets 112 to implement an image.

In fact, in the light guide plate, the scattered light beam does not have a constant direction and is diffusely reflected at various angles to be emitted to the outside. The prism sheet is mounted on the light guide plate in order to collect the light in the front direction perpendicular to the surface, thereby improving the surface luminance viewed from the front. However, since the price of the prism sheets is high, a prism light guide plate in which fine prism irregularities are formed directly on the upper surface of the light guide plate may be used.

The lamp housing is formed of a metal material, and is configured to increase the light efficiency of the lamp. In addition, it is formed to be bent in the 'c' shape, the light guide plate 106 is inserted into the 'c' bending of the lamp housing. Although not shown in the drawings, the lamp housing may be formed by extending a portion of the reflector plate 104 in a '-' shape.

On the other hand, the liquid crystal panel 110 is a thin film transistor array substrate 110b and the color filter substrate 110a which are bonded to each other while maintaining a constant cell gap, and the thin film transistor array substrate 110b and the color filter substrate. It consists of a liquid crystal layer (not shown) filled in the space of the 110a.

A plurality of pixels defined by gate lines and data lines are formed on the thin film transistor array substrate 110b, and a driving element such as a thin film transistor is formed in each pixel. The color filter substrate 110a may generate a light blocking region to prevent light leakage from occurring above the gate line, data line, and thin film transistor regions formed on the thin film transistor array substrate 110b. A black matrix and a color filter layer for real color are formed. In addition, a pixel electrode and a common electrode are formed on the thin film transistor array substrate 110b and the color filter substrate 110a, respectively, and an alignment layer for orienting liquid crystal molecules of the liquid crystal layer is coated. In this case, the liquid crystal panel may be an in-plane switching mode liquid crystal panel in which both the common electrode and the pixel electrode are formed on the thin film transistor array substrate.

The embodiments described above are illustrated to illustrate the present invention, and do not limit the scope of the present invention.

Accordingly, the scope of the invention should be determined by the appended claims rather than by the foregoing description.

As described above, the liquid crystal display module according to the present invention forms a plurality of protrusions on the inner sidewall surface of the support main in contact with the light guide plate to minimize the contact area between the light guide plate and the support main, thereby reducing friction between the light guide plate and the support main. Prevents the occurrence of mechanical noise.

In addition, the protrusion is formed of a gentle slope having a ratio of height to width of 3: 100 or more, thereby minimizing a gap between the light guide plate and the support main, thereby preventing light leakage from occurring in the gap, Improve the reliability of the product.

Claims (6)

A liquid crystal panel; A lamp for generating a light beam; A lamp housing equipped with the lamp; A light guide plate disposed at a side of the lamp to convert light incident from the lamp into a surface light source and to guide the surface light source toward the liquid crystal panel; And A support main formed inside the side wall of the stepped step surface to seat the liquid crystal panel, the lamp, the lamp housing and the light guide plate, and defining first, second and third side wall surfaces facing the light guide plate; And At least one is formed on each of the first, second, and third side wall surface, and comprises a projection having a gentle curvature, And the protrusion is formed to have a ratio of height to width of 3: 100 or more. The liquid crystal display module according to claim 1, wherein the height of the protrusion is 0.3 mm and the width is 10 mm or more. The liquid crystal display module of claim 1, wherein the light guide plate and the protrusion are in point contact or line contact. The liquid crystal display module according to claim 1, wherein the light guide plate is formed in a wedge-shaped structure in which the thickness of one side becomes thinner and guides the light beam generated by the lamp toward the liquid crystal panel. The liquid crystal display module of claim 1, wherein An optical sheet attached to an upper portion of the light guide plate to increase light efficiency incident to the liquid crystal panel; A reflection plate attached to a rear surface and a side surface of the light guide plate to reflect light emitted to the rear surface of the light guide plate to the liquid crystal panel; A lower cover surrounding one bottom and a side of the support main; And And a top case surrounding the edge and the bottom cover of the liquid crystal panel. The liquid crystal panel of claim 1, wherein A thin film transistor array substrate and a color filter substrate bonded together to maintain a uniform cell-gap opposite to each other; A liquid crystal layer formed in a space between the thin film transistor array substrate and the color filter substrate; A common electrode and a pixel electrode for driving the liquid crystal of the liquid crystal layer; And And a switching device for switching the common electrode and the pixel electrode.

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