KR20040037606A - Liquid crystal display module and assembling method thereof - Google Patents

Abstract

PURPOSE: An LCD module is provided to insert a curved portion formed on at least one of optical sheets into a groove of a support main or a predetermined gap between the support main and the optical sheets, thereby preventing the optical sheets from moving by the inserted curved portion. CONSTITUTION: A back light unit and an LCD panel(40) are accumulated inside a support main(32). A cover bottom(44) covers one lower side and a certain side of the support main(32). A top case(46) covers edges of the LCD panel(40) and the cover bottom(44). A liquid crystal is injected between a lower substrate(40b) for mounting switching elements and an upper substrate(40a) for disposing color filters. A lower polarizer(52) polarizes an optical beam passing through optical sheets(42). An upper polarizer(54) polarizes an optical beam passing through the LCD panel(40). The lower polarizer(52) and the upper polarizer(54) are attached to the LCD panel(40). The cover bottom(46) is used to fix the support main(32) and the LCD panel(40).

Description

Liquid Crystal Display Module And Assembling Method Thereof}

The present invention relates to a liquid crystal display module, and more particularly to a liquid crystal display module that can prevent the flow of the optical sheet.

A conventional notebook personal computer (hereinafter referred to as "NTPC") is manufactured in the size of a notebook so that a user can use information between mobiles. In such NTPC, a liquid crystal display module (hereinafter referred to as "LCM") is used as a display device for displaying information.

The LCM is composed of a liquid crystal panel and a driving circuit portion for driving the liquid crystal panel. The liquid crystal panel is composed of liquid crystal cells arranged in a matrix form between two glass substrates and switch elements for switching signals supplied to these liquid crystal cells, respectively. Since the liquid crystal display module includes a glass substrate as described above, the case may be easily damaged by an external impact. Thus, a case that surrounds and protects the exterior of the liquid crystal display module is used to prevent damage to the liquid crystal display module due to external impact.

Referring to FIG. 1, a conventional liquid crystal display module includes a support main 2, a backlight unit and a liquid crystal panel 10 stacked inside the support main 2, and one side of the support main 2. A cover bottom 14 surrounding the bottom and side surfaces and a top case 16 surrounding the edge and the cover bottom 14 of the liquid crystal panel 10 are provided.

The support main 2 is a mold, and the side wall surface thereof is formed into a stepped stepped surface. The innermost layer of the support main 2 has a backlight including an optical sheet 12 including a reflector plate 4, a light guide plate 6, an upper / lower diffusion sheet and an upper / lower prism sheet and a lamp housing (not shown). The liquid crystal panel 10 in which the liquid crystal is injected is stacked between the upper and lower substrates 10a and 10b on which the unit is mounted and the polarizers 22 and 24 are attached.

The light guide plate 6 guides a light beam generated from a light source (not shown) toward the liquid crystal panel 10. The optical sheet 12 including the upper / lower diffusion sheet and the upper / lower prism sheets causes the light beam guided by the light guide plate 6 to travel perpendicular to the front surface. The upper and lower diffusion sheets 12a and 12b are disposed on the light guide plate 6 to diffuse light emitted from the light guide plate 6, and the upper and lower prism sheets 12c and 12d are disposed on the upper diffusion sheet 12b. It is arranged to focus the light emitted from the diffusion sheet. In addition, the optical sheet 12 may be further provided with a protective sheet disposed on the upper prism sheet 12d to protect the upper prism sheet 12d and to increase luminance. These optical sheets 12 are fixed to the support main 2 by a double-sided adhesive tape 18.

Liquid crystal is injected into the liquid crystal panel 10 between the lower substrate 10a on which the switch elements are mounted and the upper substrate 10b on which the color filter is formed. In addition, the lower polarizing plate 22 polarizes the light beam via the optical sheet 12, and the upper polarizing plate 24 serves to polarize the light beam via the liquid crystal panel 10. The lower polarizing plate 22 and the upper polarizing plate 24 are attached to the liquid crystal panel 10.

The cover bottom 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.

The top case 16 is formed to fix the support main 2 and the liquid crystal panel 10. The top case 16 is manufactured in the form of a square strip having a flat portion and a side portion bent at right angles.

As shown in FIG. 2, the support main 2 of the conventional liquid crystal display module has a step portion 26 formed thereon so that the protrusion 18 of the optical sheets 12 may be seated. Since the protrusions 18 of the optical sheets 12 are seated on the stepped portion 26, the positions of the optical sheets 12 may be fixed, thereby preventing the phenomenon of flow of the optical sheets 12. However, the left and right flow phenomenon of the optical sheets 12 can be prevented by the step 27 of the support main 2, but the optical sheets 12 can be separated upward from the support main 2. There is a problem.

In order to solve this problem, as shown in FIG. 3, the pad 8 is formed to cover the protrusion 18 of the optical sheets 12. The pad 8 prevents the top-side separation of the optical sheets 12. However, when the liquid crystal display module flows due to a predetermined gap d between the light guide plate 6 and the support main 2 shown in FIG. 2 or when an impact is applied from the outside, the pad 8 and the double-sided adhesive tape 18 The optical sheets 12 fixed to the support main 2 by means of) are wrinkled or scratched on the surface of the light guide plate 6 by beads included in the lower diffusion sheet 12a shown in FIGS. 4 and 5. There is a problem that (A) occurs.

Accordingly, an object of the present invention is to provide a liquid crystal display module that can prevent the flow of the optical sheet.

1 is a cross-sectional view showing a conventional liquid crystal display module.

FIG. 2 is a plan view illustrating in detail the optical sheets and the support main shown in FIG. 1.

FIG. 3 is a view illustrating a pad for fixing the optical sheets shown in FIG. 2 to the support main.

4 is a plan view illustrating in detail a bead included in the diffusion sheet shown in FIG.

FIG. 5 is a cross-sectional view illustrating a light guide plate on which scratches are generated by the beads shown in FIG. 4.

6 is a cross-sectional view illustrating a liquid crystal display module according to a first embodiment of the present invention.

FIG. 7 is a perspective view illustrating a process of inserting a bent portion of the lower diffusion sheet illustrated in FIG. 6 into a groove of the support main.

8A and 8B illustrate a bending process of the lower diffusion sheet illustrated in FIG. 7.

9 is a cross-sectional view illustrating a liquid crystal display module according to a second embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

2,32: support main 4,34: reflector

6,36 light guide plate 10,40 liquid crystal panel

12,42: Optical sheet 14,44: Cover bottom

16,46 case top 18,48,72 protrusions

20: Bead 22, 24, 52, 54: polarizing plate

26,56 step 50: bend

60: home

In order to achieve the above object, the liquid crystal display module according to the present invention comprises at least one or more optical sheets, a bent portion formed to be bent in at least one of the optical sheets, and a support main in which a bent portion is inserted. It is characterized by including.

The liquid crystal display module may further include a protrusion formed to protrude outward from at least one of the optical sheets, and a step portion formed on the support main to seat the protrusions of the optical sheets.

The bent portion is characterized in that formed by bending a portion of the protrusion.

The groove is formed in the stepped portion.

The depth of the groove is characterized in that formed above the height of the bent portion.

The depth of the groove is characterized in that about 3 ~ 6 [mm].

Located below the optical sheets and characterized in that it further comprises a light guide plate for converting light from the light source into a surface light source.

The optical sheet having the bent portion is characterized in that the light diffusion sheet for diffusing light through the light guide plate.

In order to achieve the above object, a liquid crystal display module according to another embodiment of the present invention is a light guide plate, a support main formed to support the light guide plate and having a predetermined gap therebetween, the light guide plate being positioned on the light guide plate. At least one optical sheet having a bent portion is formed so as to be inserted into a predetermined gap between the mains.

The optical sheet is a light diffusion sheet for diffusing light through the light guide plate.

In order to achieve the above object, the method of assembling the liquid crystal display module according to the present invention comprises the steps of mounting the light guide plate in the support main, and inserting the bent portion bent in at least one of the optical sheets into the groove formed on the support main And mounting the liquid crystal panel on the optical sheets.

Other objects and features of the present invention in addition to the above object will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 6 to 9.

6 is a cross-sectional view illustrating a liquid crystal display module according to a first embodiment of the present invention.

Referring to FIG. 6, the liquid crystal display module according to the first exemplary embodiment of the present invention includes a support main 32, a backlight unit and a liquid crystal panel 40 stacked inside the support main 32, A cover bottom 44 surrounding one bottom and side of the support main 32 and a top case 46 surrounding the edge and the cover bottom 44 of the liquid crystal panel 40 are provided. .

Liquid crystal is injected into the liquid crystal panel 40 between the lower substrate 40b on which the switch elements are mounted and the upper substrate 40a on which the color filter is formed. In addition, the lower polarizing plate 52 polarizes the light beam via the optical sheet 42, and the upper polarizing plate 54 serves to polarize the light beam via the liquid crystal panel 40. The lower polarizing plate 52 and the upper polarizing plate 54 are attached to the liquid crystal panel 40.

The cover bottom 44 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 32.

The top case 46 is formed to fix the support main 32 and the liquid crystal panel 40. The top case 46 is manufactured in the form of a square strip having a flat portion and a side portion bent at a right angle.

The support main 32 is a mold, and the side wall surface thereof is formed into a stepped stepped surface. The support main 32 has a stepped portion to prevent the flow of the optical sheets 42 and to fix the projections 48 of the optical sheets 42 to fix the positions of the optical sheets 42. 56). The step portion 56 is formed with a groove 60 having a predetermined width and depth so that the bent portion 50 of at least one of the optical sheets 42 can be inserted. For example, the groove 60 is formed to have a predetermined depth of about 3 to 6 mm and a predetermined width of about 0.1 to 0.2 mm.

The innermost layer of the support main 32 includes an optical sheet 42 including a reflector plate 34, a light guide plate 36, an upper / lower diffusion sheet and an upper / lower prism sheet and a lamp housing (not shown). The backlight unit is mounted, and the liquid crystal panel 40 in which the liquid crystal is injected is stacked between the upper and lower substrates 40a and 40b to which the polarizing plates 52 and 54 are attached.

The backlight unit includes a light guide plate 36 for converting light generated from a light source into a surface light source, and a reflection plate positioned at a rear surface of the light guide plate 36 to reflect light emitted to the rear surface of the light guide plate 36 toward the liquid crystal panel 40. 34 and optical sheets 42 for improving the efficiency of light emitted from the light guide plate 36.

The light guide plate 36 is generally formed of polymethylmethacrylate (PMMA) having high strength and not easily being deformed or broken and having good transmittance. The reflector 34 serves to reduce light loss by reflecting light incident to itself through the back of the light guide plate 36 toward the light guide plate 36.

The optical sheets 42 have upper and lower diffusion sheets 42a and 42b for diffusing the light emitted through the exit surface of the light guide plate 36 to the entire area, and the propagation angle of the light emitted from the light guide plate 36. Upper and lower prism sheets 42c and 42d are formed to be perpendicular to the panel 40. In addition, the optical sheets 42 may be further provided with a protective sheet disposed on the upper prism sheet 42d to protect the upper prism sheet 42d and to increase luminance. The pads 38 are positioned on the optical sheets 42 to prevent the upper side of the optical sheets 42 from escaping.

At least one of such optical sheets 42 forms a bent portion 50 to be bent into the groove 60 of the support main 32. For example, the bent portion 50 is formed in the lower diffusion sheet 42a adjacent to the light guide plate 36 among the optical sheets, and is inserted into the groove 60 of the support main 32. The bent portion 50 is formed by bending a part of the protruding portion 48 of the lower diffusion sheet 42a. The height of the bent portion 50 is formed to be less than or equal to the height of the groove 60 of the support main 32.

The bent portion 50 of the lower diffusion sheet 42a is formed to extend from the protrusion 48 with the fold line 52 therebetween as shown in FIG. 8A. The bending portion 50 is folded to form an angle of about 90 ° with the protrusion 48 as shown in FIG. 8B with the fold line 52 alternately formed between the cutting portion and the non-cutting portion. Is bent and inserted into the groove (60) of. That is, the bent portion 50 of the lower diffusion sheet 42a is folded and inserted into the groove 60 of the support main 32 with the fold line 52 interposed therebetween, and the protrusion 48 of the lower diffusion sheet 42a is inserted. ) Is formed to be seated on the step portion 56 of the support main 32. As such, the bent portion 50 bent by a predetermined pressure with the fold line 52 interposed therebetween may be formed to form an angle of about 90 ° with the protrusion 48 at the time of manufacturing the lower diffusion sheet 42a.

Looking at the assembling method of the liquid crystal display module according to the first embodiment of the present invention, the light guide plate 36 is mounted in the support main 32 having the groove 60 and formed to be bent in the lower diffusion sheet 42a. The bent portion 50 is inserted into the groove 60 of the support main 32. Optical sheets 42b, 42c, and 42d other than the lower diffusion sheet 42a inserted into the grooves 60 of the support main 32 are sequentially stacked on the lower diffusion sheet 42a. The liquid crystal panel 40 is mounted on the optical sheets 42. Subsequently, the bottom and side surfaces of the support main 32 are wrapped with the cover bottom 44, and the edge and the cover bottom 44 of the liquid crystal panel 40 are wrapped with the top case 46.

As described above, the liquid crystal display module according to the first embodiment of the present invention can prevent the flow of the lower diffusion sheet when the liquid crystal display module vibrates by inserting the bent portion of the lower diffusion sheet into the groove of the support main. Accordingly, at least one of the light guide plate and the bottom diffusion sheet caused by the beads of the lower diffusion sheet may be prevented. In addition, the light traveling to the outside by the predetermined gap between the optical sheets and the support main can be blocked by the bent portion of the lower diffusion sheet, thereby preventing light loss.

9 is a cross-sectional view illustrating a liquid crystal display module according to a second embodiment of the present invention.

Referring to FIG. 9, the liquid crystal display module according to the second exemplary embodiment of the present invention is compared with the liquid crystal display module illustrated in FIG. 5 except that the bent portion of the lower diffusion sheet is inserted into a predetermined gap between the light guide plate and the support main company. With the same components.

The optical sheets 42 according to the second embodiment of the present invention include upper and lower diffusion sheets 42a and 42b for diffusing light emitted through the exit surface of the light guide plate 36 to the entire area, and the light guide plate 36. And the upper and lower prism sheets 42c and 42d for vertically advancing angles of the light emitted from the &lt; RTI ID = 0.0 &gt; In addition, the optical sheets 42 may be further provided with a protective sheet disposed on the upper prism sheet 42d to protect the upper prism sheet 42d and to increase luminance.

At least one of the protrusions 72 of the optical sheets 42 may be inserted into a predetermined gap 70 between the support main 32 and the light guide plate 36. Here, the predetermined gap 70 is formed to have a width into which at least one of the optical sheets 42 can be inserted.

For example, the protrusion 72 of the lower diffusion sheet 42a adjacent to the light guide plate 36 of the optical sheets 42 is inserted into a predetermined gap 70 between the support main 32 and the light guide plate 36. The protruding portion 72 is formed to protrude from the lower diffusion sheet 42a and bend. The height of the protrusion 72 is smaller than or equal to the height of the predetermined gap 70 between the support main 32 and the light guide plate 36.

The protruding portion 72 of the lower diffusion sheet 42a is folded at about 90 ° and bent and inserted into a predetermined gap 70 between the support main 32 and the light guide plate 36 by a predetermined pressure. Alternatively, the protrusions 72 may be formed to be bent at about 90 ° when the lower diffusion sheet 42a is manufactured.

Looking at the assembling method of the liquid crystal display module according to the second embodiment of the present invention, after mounting the light guide plate 36 in the support main 32 support the protrusion 72 formed to be bent on the lower diffusion sheet (42a) It is inserted into a predetermined gap 70 between the main 32 and the light guide plate 36. The optical sheets 42b, 42c, and 42d other than the lower diffusion sheet 42a inserted into the predetermined gap 70 are sequentially stacked on the lower diffusion sheet 42a. The liquid crystal panel 40 is mounted on the optical sheets 42. Subsequently, the bottom and side surfaces of the support main 32 are wrapped with the cover bottom 44, and the edge and the cover bottom 44 of the liquid crystal panel 40 are wrapped with the top case 46.

As described above, the liquid crystal display module according to the second embodiment of the present invention can prevent the flow of the lower diffusion sheet when the liquid crystal display module vibrates by inserting a bent portion of the lower diffusion sheet into a predetermined gap between the support main and the light guide plate. Accordingly, at least one of the light guide plate and the bottom diffusion sheet caused by the beads of the lower diffusion sheet may be prevented. In addition, the light traveling to the outside by the predetermined gap between the optical sheets and the support main can be blocked by the protrusion of the lower diffusion sheet, thereby preventing the light loss.

As described above, the liquid crystal display module according to the present invention inserts the bent portion formed in at least one of the optical sheets into a groove of the support main or a predetermined gap between the support main and the optical sheet. By the bent portion inserted into the groove or the predetermined gap of the support main, it is possible to prevent the flow of the optical sheets. In addition, since the double-sided adhesive tape for fixing the optical sheet to the support main body is unnecessary, the number of parts can be reduced and the wrinkles of the optical sheet due to the double-sided tape can be prevented.

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.

Claims (11)

At least one or more optical sheets, A bent part formed to be bent in at least one of the optical sheets; And a support main in which a groove is formed to insert the bent portion. The method of claim 1, A protrusion formed to protrude outward from at least one of the optical sheets; And a stepped portion formed on the support main so that the protrusions of the optical sheets are seated. The method of claim 2, The bent portion is a liquid crystal display module, characterized in that formed by bending a portion of the protrusion. The method of claim 2, And the groove is formed in the stepped portion. The method of claim 1, The depth of the groove is a liquid crystal display module, characterized in that formed above the height of the bent portion. The method of claim 5, wherein And a depth of the groove is about 3 to 6 [mm]. The method of claim 1, And a light guide plate positioned below the optical sheets and configured to convert light from a light source into a surface light source. The method of claim 7, wherein And the optical sheet having the bent portion is a light diffusion sheet for diffusing light through the light guide plate. The light guide plate, A support main that supports the light guide plate and is formed with the light guide plate and a predetermined gap therebetween; And at least one optical sheet disposed on the light guide plate and having a bent portion formed to be inserted into a predetermined gap between the light guide plate and the support main. The method of claim 9, And the optical sheet is a light diffusing sheet for diffusing light through the light guide plate. In the method of assembling a liquid crystal panel, a light guide plate and at least one optical sheet on a support main, Mounting the light guide plate in the support main; Inserting a bent portion bent in at least one of the optical sheets into a groove formed on the support main; And mounting the liquid crystal panel on the optical sheets.