KR101507156B1 - Liquid Crystal Display Module - Google Patents

Abstract

The present invention relates to a liquid crystal display module that prevents ripples in an edge region of a liquid crystal panel.

The liquid crystal display module includes a first substrate and a second substrate, a sealant for attaching the substrates, and a liquid crystal panel having a liquid crystal layer sandwiched between the bonded substrates. And a supporter main body for seating the liquid crystal panel with a stepped surface formed on a sidewall of the inner side as a seating end; The liquid crystal display device according to any one of claims 1 to 3, wherein the liquid crystal layer is formed on the transparent substrate. And a step portion spaced apart from the liquid crystal panel by a predetermined distance. The seating portion is formed so as not to overlap the region where the liquid crystal layer is formed.

Description

A liquid crystal display module (Liquid Crystal Display Module)

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display module, and more particularly, to a liquid crystal display module that prevents ripples in an edge region of a liquid crystal panel.

In recent information society, the importance of display devices as visual information delivery media is emphasized more than ever. Cathode Ray Tube or CRT, which was once mainstream, had a problem in weight and volume. In order to overcome the limitations of such a cathode ray tube, many kinds of flat panel display devices are being developed.

The flat panel display device 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 commercialized and commercially available.

Particularly, the liquid crystal display device is in a trend of widening its application range due to features such as light weight, thinness, and low power consumption driving. In accordance with this trend, liquid crystal display devices are used in portable computers such as notebook PCs, office automation devices, audio / video devices, indoor and outdoor advertisement display devices, and the like. The liquid crystal display device displays a desired image on the screen by controlling the transmission amount of the light beam according to an image signal applied to a plurality of control switches arranged in a matrix form. This liquid crystal display device is rapidly developing with a large size and high resolution due to recent achievements of mass production technology and research and development.

Generally, 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 is composed of a liquid crystal panel in which liquid crystal cells are arranged in a matrix form between two glass substrates and a backlight unit for irradiating the liquid crystal panel with light. The liquid crystal panel and the backlight unit need to be tightly integrated in order to prevent light loss and also be protected so as not to be damaged by an external impact. For this purpose, a liquid crystal display element case is provided which is formed to surround the backlight unit including the edge of the liquid crystal panel.

There are two types of backlight units of the liquid crystal display module: direct-type and edge-type. In the edge type method, a light source is disposed on the outer surface of a flat plate, and light is incident on the entire surface of the liquid crystal panel from a light source using a transparent light guide plate. In the direct type, a light source is placed on the back surface 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 backlight unit of a conventional edge type, and FIG. 2 is a sectional view taken along line I-I 'of FIG. In FIG. 2, 'CT' denotes a region occupied by the case top, 'PL' denotes a panel region occupied by the liquid crystal panel, 'SL' denotes a sealant region occupied by the sealant, 'LC' denotes a liquid crystal region occupied by the liquid crystal layer, 'SM' represents the area occupied by the supporter main. In FIG. 2, reference numeral 38 denotes a light-shielding tape for preventing light loss.

1 and 2, a conventional liquid crystal display module includes a supporter main body 10, a liquid crystal panel assembly 20 and a backlight unit 30 laminated inside the supporter main body 10, a supporter main body 10 A cover bottom 40 for wrapping the side and bottom of the backlight unit 30 and the bottom of the backlight unit 30 and a case top 10 for wrapping the edges of the liquid crystal panel assembly 20 and the sides 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 ). Between the upper substrate 21 and the lower substrate 22, a liquid crystal layer is sandwiched and a spacer is formed to maintain a constant interval between the liquid crystal layer and the lower substrate 22. The upper substrate 21 and the lower substrate 22 are bonded together by a sealant 24, and an upper polarizer 25 and a lower polarizer 26 are attached to the front and back surfaces, respectively.

The supporter main body 10 is a mold, and the sidewall surface of the supporter main body 10 is formed into a stepped stepped surface, and the liquid crystal panel assembly 20 is seated on the stepped surface 10a. Although not shown, the backlight unit 30 for irradiating light to the liquid crystal panel assembly 20 is also fixed on the inner side wall of the supporter main body 10. Here, the backlight unit 30 includes an optical sheet 35, a light guide plate 34, and a reflection plate 36 including a light source assembly (not shown).

In the conventional liquid crystal display module, the liquid crystal panel 23 is stacked on the seating end 10a of the supporter main body 10 including not only the sealant area SL but also a part of the liquid crystal area LC as shown in FIG. 2 . Accordingly, in the conventional liquid crystal display module, ripple is generated in the edge region A of the liquid crystal panel 23 by the liquid crystal region LC which is superimposed and seated on the seating end 10a of the supporter main body 10 do. This ripple is generated when the liquid crystal layer sandwiched by the edge region A of the liquid crystal panel 23 is pressed by the seating end 10a of the supporter main body 10. [

Accordingly, an object of the present invention is to provide a liquid crystal display module which prevents ripples 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 first and second substrates, a sealant for attaching the substrates to each other, A liquid crystal panel having a layer; And a supporter main body for seating the liquid crystal panel with a stepped surface formed on a sidewall of the inner side as a seating end; The liquid crystal display device according to any one of claims 1 to 3, wherein the liquid crystal layer is formed on the transparent substrate. And a step portion spaced apart from the liquid crystal panel by a predetermined distance. The seating portion is formed so as not to overlap the region where the liquid crystal layer is formed.

The stepped portion is formed to extend by a predetermined gap toward the seat portion corresponding to the region to which the sealant is applied.

The constant gap is 0.1 to 0.2 mm.

And a step distance between the seating portion and the stepped portion is smaller than a thickness of the optical sheet constituting the backlight unit.

The step distance between the seat portion and the step portion is 0.1 to 0.2 mm.

The liquid crystal display module according to the present invention is formed so that the seating end of the supporter main body is stepped so that the liquid crystal layer sandwiched by the edge region of the liquid crystal panel is not pressed by the seating end of the supporter main body, The occurrence of ripples can be suppressed.

Further, in the liquid crystal display module according to the present invention, the seating end of the supporter main body is formed so as to be stepped without changing the structure (area) of the light guide plate so that the liquid crystal layer sandwiched by the edge region of the liquid crystal panel is not pressed by the seating end of the supporter main It is possible to effectively suppress the occurrence of ripples in the edge region of the liquid crystal panel while maintaining the efficiency of the light guide plate at the maximum.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 3 to 6. FIG.

3 is a plan view showing a liquid crystal display module according to an embodiment of the present invention. 4 is a cross-sectional view taken along line II-II 'of FIG. In FIG. 4, 'CT' denotes a region occupied by the case top, 'PL' denotes a panel region occupied by the liquid crystal panel, 'SL' denotes a sealant region occupied by the sealant, 'LC' denotes a liquid crystal region occupied by the liquid crystal layer, 'SM' represents the area occupied by the supporter main.

3 and 4, a liquid crystal display module according to an embodiment of the present invention includes a supporter main 110, a liquid crystal panel assembly 120 stacked inside the supporter main 110, and a backlight unit 130 A cover bottom 140 for covering the side surface and the bottom surface of the supporter main body 110 and the bottom surface of the backlight unit 130 and a cover bottom 140 for covering the edge of the liquid crystal panel assembly 120 and the side surface of the cover bottom 140 And a case top 101.

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 .

A color filter, a common electrode, a black matrix, and the like (not shown) are formed on the upper substrate 121 of the liquid crystal panel 123. Signal lines such as data lines and gate lines, not shown, 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 intersections of the data lines and the gate lines. 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. A pixel electrode is formed in the pixel region between the data line and the gate line. In addition, a pad region to which the data lines and the gate lines are connected is formed on one side of the lower substrate 122, and a pad (not shown) having a driver integrated circuit for applying a driving signal to the TFT is mounted on the pad region. A carrier package (Tape Carrier Package) is attached. The tape carrier package supplies a data signal from the driver integrated circuit to the data lines and supplies a scan signal to the gate lines. Between the upper substrate 121 and the lower substrate 122, a liquid crystal layer is sandwiched and spacers are formed to maintain a constant interval between the liquid crystal layers 121 and 122. The upper substrate 121 and the lower substrate 122 are bonded together by a sealant 124 and an upper polarizer 125 and a lower polarizer 126 are attached to the front and back surfaces, respectively.

The supporter main body 110 is a mold, and the sidewall surface of the supporter main body 110 is formed into a stepped stepped surface, and the liquid crystal panel assembly 120 is seated with the stepped surface as the seating end 113. Specifically, the seating end 113 of the supporter main 110 includes a seating part 111 formed at a first height h1 for seating the liquid crystal panel assembly 120, And a step portion 112 formed at a second height h2 lower than the first height h1 to prevent the liquid crystal region LC from being pressed by the seating end 113 of the supporter main 110 . The step portion 112 is formed in the region A overlapping with the liquid crystal region LC and the first gap g1 toward the seating portion 111 corresponding to the sealant region SL, And may be formed to extend by 0.1 to 0.2 mm. The gap between the seating portion 111 and the step portion 112 is set to a second gap g2 smaller than the thickness of the optical sheet 135 to prevent the optical sheet 135 from flowing, . The liquid crystal layer sandwiched by the edge region A of the liquid crystal panel 123 due to the step difference of the seating end 113 of the supporter main 110 is not affected by the pressing of the seating end 113 of the supporter main 110 . Although not shown, the backlight unit 130 for irradiating light to the liquid crystal panel assembly 120 is also mounted on another inner sidewall of the supporter main 110 and fixed thereon.

The backlight unit 130 includes a light source assembly (not shown) for generating light, a light guide plate 134 for converting the light incident from the light source assembly into a surface light source, a light guide plate 134 positioned below the light guide plate 134, And a reflection plate 136 for reflecting the light traveling toward the side surface to the upper surface and an optical sheet 135 for adjusting the diffusion and the traveling direction of the light transmitted through the light guide plate 134.

The light source assembly includes a cold cathode fluorescent lamp (CCFL), a hot cathode fluorescent lamp (HCFL), an external electrode fluorescent lamp (EEFL), a light emitting diode (Light Emitting Diode) Emitting diode (LED), and preferably a light-emitting diode (LED) may be used. The light source assembly generates light by being driven by an applied driving power, and causes the generated light to enter the light guide plate 134. For this, the light source assembly is fixedly supported between the light guide plate 134 and a part of the stepped stepped surfaces of the supporter main 110, though not shown.

The light guide plate 134 allows the light incident from the light source assembly to reach a distance from the light source assembly through its internal reflection. The light guide plate 134 is formed of PMMA (Polymethylmethacrylate) which has high strength and is not easily deformed or broken, and has a high transmittance. On the back surface of the light guide plate 134, a reflection plate 136 is provided so as to face each other.

The reflection plate 136 serves to reduce light loss by reflecting light incident on the light guide plate 134 toward the light guide plate 134 through the back surface of the light guide plate 134. When light from the light source assembly is incident on the light guide plate 134, light traveling to the lower surface and the side surface of the light guide plate 134 is reflected by the reflection plate 136 and proceeds toward the exit surface of the light guide plate 134.

The light emitted from the light exit surface of the light guide plate 134 is diffused and traveled by the optical sheet 135. To this end, the optical sheet 135 includes a diffusion sheet for diffusing the light emitted via the exit surface of the light guide plate 134 to the entire area of the liquid crystal panel 123 and a diffusion sheet for diffusing the light emitted from the light guide plate 134, A prism sheet that is perpendicular to the prism sheet 123, and a protective sheet that protects the prism sheet.

The light shielding tape 138 is attached on one edge of the optical sheet 135 and on the seating 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 cover one side bottom surface and side surface of the supporter main 110 and one bottom surface of the reflection plate 136. The cover bottom 140 may be formed of a metal material, such as aluminum.

The case top 101 is installed to surround one side edge and side surface of the liquid crystal panel 123 and the cover bottom 140. The case 101 covers the edge of the liquid crystal panel 123 to protect the liquid crystal panel 123 from an external impact.

As described above, the liquid crystal display module according to the embodiment of the present invention is configured such that the seating end 113 of the supporter main 110 is formed so as to be stepped so that the liquid crystal layer sandwiched by the edge region A of the liquid crystal panel 123, The liquid crystal panel 123 is prevented from being pressed by the seating end 113 of the main body 110 to suppress the occurrence of ripples in the edge region A of the liquid crystal panel 123. [

The liquid crystal display module according to an embodiment of the present invention may be configured such that the seating end 113 of the supporter main 110 is stepped without changing the structure (area / width) of the light guide plate 134, The liquid crystal layer sandwiched by the region is prevented from being pressed by the seating end 113 of the supporter main 110 and the ripple generation in the edge region of the liquid crystal panel 123 can be suppressed It can be suppressed effectively.

5 is a plan view of a liquid crystal display module according to another embodiment of the present invention. 6 is a cross-sectional view taken along line III-III 'of FIG. In FIG. 6, 'CT' denotes a region occupied by the case top, 'PL' denotes a panel region occupied by the liquid crystal panel, 'SL' denotes a sealant region occupied by the sealant, 'LC' denotes 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 stacked inside the supporter main 210, and a backlight unit 230 A cover bottom 140 for covering the side surfaces and the bottom surface of the supporter main body 210 and the bottom surface of the backlight unit 230 and a cover bottom 140 for covering the edges of the liquid crystal panel assembly 120 and the side surface of the cover bottom 140. [ And a case top 101.

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, and therefore, the same reference numerals as those in Fig. 4 are assigned thereto, . The light shielding tape 138 and 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. Are denoted by the same reference numerals as those in Fig. 4, and a detailed description thereof will be omitted.

The supporter main body 210 is a mold and its inner side wall surface is formed into a stepped stepped surface, and the liquid crystal panel assembly 120 is seated with the stepped surface as a seating end 213. More specifically, the seating end 213 of the supporter main 210 is fixed to the liquid crystal panel LC by the liquid crystal panel 210 to prevent the liquid crystal area LC from being pressed by the seating end 213 of the supporter main 210 when the liquid crystal panel assembly 120 is seated. The width W is formed so as not to correspond to the region LC. In this case, the seating end 213 of the supporter main 210 may be further reduced by a third gap g3, i.e., 0.1 to 0.2 mm, toward the sealant region SL in consideration of the work tolerance. The liquid crystal layer sandwiched by the edge region of the liquid crystal panel 123 by reducing the width W of the seating end 213 of the supporter main 210 is greater than the influence of the pressing end 213 of the supporter main 210 .

The light guide plate 234 allows the light incident from the light source assembly to reach a distance from the light source assembly through its internal reflection. The light guide plate 234 is formed of PMMA (Polymethylmethacrylate), which has high strength and is not easily deformed or broken, and has a high 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 unevenly widened as compared with the conventional one, and the fourth gap g4, that is, 1.1 mm is increased.

The liquid crystal display module according to another embodiment of the present invention reduces the width of the seating end 113 of the supporter main 210 so as not to correspond to the liquid crystal area LC, It is possible to suppress the occurrence of ripples in the edge region of the liquid crystal panel 123 by preventing the liquid crystal panel 123 from being pressed by the step 213. [ However, in the liquid crystal display module according to another embodiment of the present invention, the width of the light guide plate 234 is increased to the width side by the reduced width of the seating end 213 of the supporter main 210, There is a disadvantage in that the luminance of the emitted light is reduced by about 2 to 3%.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the 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 backlight unit.

Fig. 2 is a cross-sectional view taken along line I-I 'of Fig. 1; 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 taken along line II-II 'of FIG. 3; FIG.

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 taken along line III-III 'of FIG. 5; FIG.

Description of the Related Art

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 plate 130: back light unit

134: light guide plate 135: optical sheet

136: Reflector 138: Shading tape

140: Cover Bottom

Claims (5)

In a liquid crystal display module having a backlight unit, A liquid crystal panel having first and second substrates, a sealant for attaching the substrates, and a liquid crystal layer sandwiched between the bonded substrates; And And a supporter main body having a stepped surface formed on a sidewall of the inner side thereof as a stepped end to seat the liquid crystal panel; The liquid crystal display device according to any one of claims 1 to 3, wherein the liquid crystal layer is formed on the transparent substrate. And a step portion spaced apart from the liquid crystal panel by a predetermined distance, Wherein the seating portion is formed so as not to overlap with the region where the liquid crystal layer is formed and the step portion is formed to extend by a certain gap toward the seating portion corresponding to the region to which the sealant is applied and the predetermined gap is 0.1 to 0.2 mm Liquid crystal display module characterized by. delete delete The method according to claim 1, Wherein a step distance between the seating portion and the stepped portion is smaller than a thickness of the optical sheet constituting the backlight unit. 5. The method of claim 4, Wherein a step distance between the seating portion and the stepped portion is 0.1 to 0.2 mm.

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