KR20080045820A - Liquid crystal display module - Google Patents

Abstract

An LCD(Liquid Crystal Display) module is provided to fix a light guide plate and optical sheets simultaneously using a sheet fixing member to reduce the number of assembling components, and reduce the manufacturing cost. An LCD module includes an LCD panel(610), a lamp(621) providing light to the LCD panel, a light guide plate(622), a plurality of optical sheets(624a,624b,624c), a main support(630), and a fixing pad(660). The light guide plate is located at the side of the lamp, converts light emitted from the lamp to a plane light and provides the plane light to the LCD panel. The optical sheets are located on the light guide plate and have ears(625) at the sides thereof. The main support supports the LCD panel and is combined with the ears to support the sides of the optical sheets. The fixing pad extended to the light guide plate to simultaneously fix the side of the light guide plate and the optical sheets covers the ears.

Description

Liquid Crystal Display Module {LIQUID CRYSTAL DISPLAY MODULE}

1 is a plan view illustrating an appearance of a liquid crystal display module according to the related art.

FIG. 2 is an enlarged view illustrating a coupling relationship between an optical sheet and a sheet fixing member in region A of FIG. 1.

3 is a cross-sectional view of a liquid crystal display module according to the prior art.

4 is a perspective view illustrating a coupling relationship between a fixing pad and a light guide plate according to an exemplary embodiment of the present invention.

5 is a side view showing a fixing pad according to an embodiment of the present invention.

6 is an exploded perspective view illustrating a liquid crystal display module according to an exemplary embodiment of the present invention.

7 is a cross-sectional view illustrating a liquid crystal display module according to an exemplary embodiment of the present invention.

(Explanation of symbols for the main parts of the drawing)

110, 630: support main 111, 631: rib

113, 635: coupling groove 120, 624: a plurality of optical sheets

123 and 625: Ear parts 130 and 622: Light guide plate

140, 660: fixed pad 150: double-sided tape

610: liquid crystal panel 612: drive driver

620: backlight unit 621: lamp

623: reflective sheet 624a: diffusion sheet

624b: prism sheet 624c: protective sheet

640: bottom cover 650: top case

The present invention relates to a liquid crystal display device, and more particularly, to a module structure of a liquid crystal display device for preventing the light guide plate from flowing.

In general, a liquid crystal display (LCD) is formed by arranging two substrates on which electric field generating electrodes are formed to face each other, forming a liquid crystal layer between the two substrates, and then applying a voltage to the two electrodes. By moving the liquid crystal molecules of the liquid crystal layer by the electric field, it is a device that represents the image by controlling the light transmittance that varies accordingly.

The liquid crystal display includes a liquid crystal display module (LCM), a driving circuit unit for driving the liquid crystal display module, and an external case.

The liquid crystal display module includes a liquid crystal panel in which liquid crystal cells are arranged in a matrix form between two glass substrates, a backlight unit for supplying light to the liquid crystal panel, a cover for protecting them, and the like.

Hereinafter, the module structure of the liquid crystal display according to the related art will be described in detail.

1 is a plan view illustrating an appearance of a liquid crystal display module according to the prior art, and FIG. 2 is an enlarged view illustrating a coupling relationship between an optical sheet and a sheet fixing member in region A of FIG. 1, and FIG. It is sectional drawing of a liquid crystal display module.

1 to 3, a liquid crystal display module according to the related art includes a liquid crystal panel 10, a backlight unit (not shown) for supplying light to the liquid crystal panel 10, a liquid crystal panel 10, and a backlight unit. It includes a support main 30 for receiving, the bottom cover 40 on which the backlight unit is seated while supporting the lower surface of the support main 30.

In addition, the backlight unit includes a light guide plate 22 for guiding light generated from a lamp toward the front liquid crystal panel 10, a plurality of optical sheets 24 positioned above the light guide plate 22, and a lower part of the light guide plate 22. And a reflective sheet 23 positioned at.

In this case, the light guide plate 22 is an indispensable element in the edge type structure in which the lamp is installed at the side, and is formed between the liquid crystal panel 10 and the bottom cover 40.

A plurality of optical sheets 24 are provided between the liquid crystal panel 10 and the light guide plate 22 to uniformly diffuse and collect light incident from the light guide plate 22.

The plurality of optical sheets 24 are fixed by the combination of the support main 30 and the bottom cover 40, or are supported by a separate fixing means, for example, the sheet fixing member 26, to the support main 30. It is fixed to the main 30.

1 and 2 illustrate a structure in which the sheet fixing member 26, the optical sheet 24, and the support main 30 are coupled to each other, and the support main 30 has an ear 25 of the plurality of optical sheets 40. A plurality of coupling grooves 30a are formed to be coupled.

Therefore, the coupling groove 30a of the support main 30 and the plurality of ear portions 25 are combined in a one-to-one manner to mount the plurality of optical sheets 24 in the support main 30, and to fix the sheets on each ear portion 25. The member 26 is provided to fix the plurality of optical sheets 24.

In general, the plurality of optical sheets 24 are susceptible to external impact or heat, and thus, when a problem such as wrinkles or folding occurs in the optical sheet 24 occurs, the optical sheet 24 may not function properly. It has been a cause of poor image quality.

However, since the sheet fixing member 26 fixes the optical sheet 24 to the support main 30 by the double-sided tape, it is possible to prevent wrinkles of the optical sheet 30.

However, since the liquid crystal display module according to the related art does not fix the light guide plate 22, a gap occurs between the bottom cover 40 surrounding the side surface of the light guide plate 22, and the light guide plate 22 flows through the gap. Done.

In addition, when the thickness of the light guide plate 22 becomes smaller as the light incident part enters the light incident part, the light guide plate 22 is formed by a relatively large space between the lower part of the light guide plate 22 and the bottom cover 40. ) Up and down flow is severe.

When the light guide plate 22 flows, noise is generated and a defect may occur due to noise.

Accordingly, an object of the present invention is to provide a liquid crystal display module which can prevent the occurrence of noise and defects caused by noise by preventing the light guide plate from flowing.

Another object of the present invention is to provide a liquid crystal display that can simplify assembly parts and reduce material costs by configuring the optical sheet as well as the light guide plate to be fixed at the same time by using a sheet fixing member for fixing the optical sheet. It is.

Further technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above are clearly understood by those skilled in the art from the following description. It can be understood.

The liquid crystal display module according to the present invention for achieving the technical problem is located in the liquid crystal panel, a lamp for supplying light to the liquid crystal panel, the side of the lamp, and converts the light incident from the lamp into planar light A light guide plate for advancing toward the liquid crystal panel, a plurality of optical sheets disposed on an upper part of the light guide plate, and supporting a plurality of optical sheets having a plurality of ears formed on a side thereof, and supporting the liquid crystal panel, and coupled to each of the ears to support side surfaces of the plurality of optical sheets. And a fixing pad covering the main portion and the plurality of ears, the width of which extends to the light guide plate to simultaneously fix not only the optical sheet but also the sides of the light guide plate.

Specific details of other embodiments are included in the detailed description and the drawings. Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. Like reference numerals refer to like elements throughout.

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

4 is a perspective view illustrating a coupling relationship between a fixing pad and a light guide plate according to an exemplary embodiment of the present invention, and illustrates a structure in which a fixing pad for fixing an optical sheet is coupled to the light guide plate and the support main.

Referring to FIG. 4, the support main 110 according to the exemplary embodiment of the present invention has a rectangular shape so as to support the edge of the liquid crystal panel positioned in front. The inner side wall surface is formed as a stepped stepped portion so as to support the rear backlight unit.

In addition, the support main 110 includes a rib part 111 supporting the liquid crystal panel on four sides and to which the optical sheet 120 is coupled.

In addition, the rib 111 is provided with a coupling groove 113 to fix the optical sheet 120.

At least one or more coupling grooves 113 may be formed along the rib part 111.

The light guide plate 130 for guiding the light generated from the lamp of the backlight unit to the front liquid crystal panel is accommodated in the rear surface of the support main 110 configured as described above, and the light guide plate 130 proceeds from the light guide plate 130 above the light guide plate 130. A plurality of optical sheets 120 are formed to diffuse and focus light.

In this case, the plurality of optical sheets 120 is formed with an ear portion 123 coupled to the support main 110 in the coupling groove 113.

Ear portion 123 may be formed one by one on both sides facing each other, or may be formed one or more. Alternatively, all four sides may be formed. In this case, the number of ear parts 123 is formed at least one or more per one side.

The fixing pad 140 is positioned in the coupling groove 113 of the support main 110 to fix the side of the light guide plate 130 as well as the plurality of optical sheets 120.

In detail, the fixing pad 140 is positioned on the ears 123 of the plurality of optical sheets 120 seated in the coupling groove 113, and the width W thereof is the width W1 of the ears 123. ) And extends to the light guide plate 130 to simultaneously cover the top surfaces of the plurality of optical sheets 120 and the light guide plate 130. Accordingly, not only the plurality of optical sheets 120 but also the light guide plate 130 are simultaneously fixed.

At this time, in consideration of the aperture ratio of the light, the width W of the fixing pad 140 is larger than the width W1 of the ear part 123 and extends to the light guide plate 130, but smaller than the display portion (not shown) of the light guide plate 130. Good to do.

5 is a side view showing a fixing pad according to an embodiment of the present invention.

As shown in FIG. 5, the fixing pad 140 fixes the plurality of optical sheets 120 and the light guide plate 130 by the double-sided tape 150.

The material of the fixing pad 140 is selected by selecting one of polyethylene terephtalate (PET), polyvinyl chloride (PVC), and polycarbonate (PC).

The double-sided tape 150 is provided on both sides of the fixing pad 140 on the long axis direction and is attached to the rib 111 of the support main 110.

That is, the center of the fixing pad 140 without the double-sided tape 150 is located at the ear 123 of the optical sheet 120, and both sides of the fixing pad 140 with the double-sided tape 150 are supported. The plurality of optical sheets 120 and the light guide plate 130 are fixed by being attached to the ribs 111 of the main 110.

The double-sided tape 150 is not limited to the structure as shown, it can be provided on the fixing pad 140, as a whole.

Hereinafter, a configuration of the liquid crystal display module to which the main part of the present invention described above is applied will be described.

6 is an exploded perspective view illustrating a liquid crystal display module according to an exemplary embodiment of the present invention, and FIG. 7 is a cross-sectional view illustrating a liquid crystal display module according to an exemplary embodiment of the present invention.

Referring to FIG. 6, a liquid crystal display module according to an exemplary embodiment of the present invention includes a liquid crystal panel 610, a backlight unit 620 for supplying light to the liquid crystal panel 610, a liquid crystal panel 610, and a backlight unit 620. A bottom cover 640 surrounding the bottom of the support main 630 supporting the main body 630, the bottom of the support main 630, and seating the backlight unit 620, and a top case 650 covering the front edge of the liquid crystal panel 610. Include.

The liquid crystal panel 610 is coupled with a driving driver 612 for driving unit pixels formed in the liquid crystal panel 610.

The drive driver 612 typically includes a gate drive driver and a data drive driver.

The backlight unit 620 is attached to a lamp 621 for generating light, a light guide plate 622 for providing the light generated from the lamp 621 to the front of the liquid crystal panel 610, and a rear surface of the light guide plate 622. And a reflective sheet 623 for reflecting the light emitted backward to improve the efficiency of the light, and a plurality of optical sheets 624 stacked on the front surface of the light guide plate 622 to scatter the light emitted from the light guide plate 622. do.

The lamp 621 uses any one of a Cold Cathode Fluorescent Lamp (CCFL), an External Electrode Fluorescent Lamp (EEFL), and a Light Emitting Diode (LED).

The light guide plate 622 converts the light generated by the lamp 621 into planar light, and guides the converted light toward the front liquid crystal panel 610.

As shown in the drawing, the light guide plate 622 may be formed to have a smaller thickness toward the side of the light incident portion than the light incident portion to which light is incident, or may be formed in a flat shape having a predetermined thickness.

Alternatively, a plurality of dot patterns may be formed on the bottom surface of the light guide plate 622 to increase light scattering efficiency.

The plurality of optical sheets 624 are for diffusing and condensing light incident from the light guide plate 622, and are provided with a diffusion sheet 624a, a prism sheet 624b, and a protective sheet 624c as shown. In some cases, it may be provided with two diffusion sheets and two prism sheets.

In the plurality of optical sheets 624 configured as described above, ear parts 625 coupled to the support main 630 are formed on the side thereof.

At this time, each ear 625 may be formed only on both sides facing each other, or all four sides of the optical sheet 624 may be formed. In addition, at least one ear portion 625 is formed at each side portion.

The support main 630 is provided in a rectangular frame shape, and a stepped stepped portion is formed on an inner sidewall surface to accommodate the upper liquid crystal panel 610 and the lower backlight unit 620. Therefore, the support main 630 is fixed to the liquid crystal panel 610 by combining with the bottom cover 640 supporting the liquid crystal panel 610 from the lower side.

The front edge of the support main 630 is provided with a rib portion 631 supporting the liquid crystal panel 610 and guiding the plurality of optical sheets 624, and the rib portion 631 has an ear portion of the optical sheet 624. 625 is inserted to form a coupling groove 635 for seating the optical sheet 624 on the support main 630.

Here, the coupling groove 635 may be modified and changed according to the position and shape of the ear portion 625 formed in the optical sheet 624.

Therefore, the liquid crystal display module according to the embodiment of the present invention is assembled as follows.

As illustrated in FIG. 7, the reflective sheet 623 of the backlight unit 620 is seated on the inner bottom of the bottom cover 640, and the light guide plate 622 and the plurality of optical sheets 624 are disposed on the reflective sheet 623. , And lamps (not shown) are seated in sequence.

At this time, the ear part 625 of the optical sheet 624 is inserted into the coupling groove 635 of the support main 630, so that the support main 630 supports the side edge of the optical sheet 624.

In addition, the liquid crystal panel 610 is seated on the upper side of the optical sheet 624 by the support main 630, and the top case 650 is covered on the front surface of the liquid crystal panel 610 to be assembled with the bottom cover 640.

Here, a fixing pad 660 is provided at an ear portion 625 of the optical sheet 624 to fix the heat sensitive optical sheet 624, and the fixing pad 660 overlaps the size of the ear portion 625 so as to fix the pad. Both sides of 660 are coupled to support main 630 by double sided tape.

As shown in the cross-sectional view of FIG. 7, the width W of the fixing pad 660 extends to the light guide plate 622 to simultaneously fix the light guide plate 622 as well as the plurality of optical sheets 624. .

In particular, the extended portion of the fixing pad 660 extending toward the light guide plate 622 is formed by the plurality of optical sheets 624 and the light guide plate by the load of the top case 650 pressed from the front and the bottom cover 640 supported from below. 622 is pressed, thereby preventing the flow of the light guide plate 622 as well as the plurality of optical sheets 624.

Accordingly, the liquid crystal display module according to the embodiment of the present invention does not require a separate work process, and extends the fixing pad 660 for fixing the optical sheet 624 to the light guide plate 622 to prevent the flow of the light guide plate 622. By preventing the noise, noise and defects due to the flow of the light guide plate 622 are eliminated.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that.

Therefore, since the embodiments described above are provided to completely inform the scope of the invention to those skilled in the art, it should be understood that they are exemplary in all respects and not limited. The invention is only defined by the scope of the claims.

The liquid crystal display module according to the present invention made as described above does not require a separate manufacturing process in order to prevent the flow of the light guide plate, and is easy to apply, and simultaneously fixes the assembly part by fixing the optical sheet and the light guide plate through one fixing pad. This can simplify and reduce material costs.

In addition, the process of combining the optical sheet and the light guide plate is simple, which saves the processing time, thereby contributing to the increase in production.

Claims (12)

Liquid crystal panels; A lamp for supplying light to the liquid crystal panel; A light guide plate positioned at a side of the lamp and configured to convert light incident from the lamp into planar light and propagate it toward the liquid crystal panel; A plurality of optical sheets disposed on the light guide plate and having a plurality of ears formed on a side thereof; A support main that supports the liquid crystal panel and is coupled to each of the ear parts to support side surfaces of the plurality of optical sheets; And A fixing pad covering each of the plurality of ear portions, the width of which extends to the light guide plate to simultaneously fix not only the optical sheet but also the sides of the light guide plate Liquid crystal display module comprising a. The method of claim 1, The fixing pad may be configured by selecting any one of polyethylene terephtalate (PET), polyvinyl chloride (PVC), and polycarbonate (PC). The method of claim 1, The fixing pad is fixed by a double-sided tape. The method of claim 3, And the double-sided tape is formed only at both sides in the long axis direction of the fixing pad. The method of claim 1, The width of the fixing pad is larger than the width of the ear portion and less than the display portion of the light guide plate. The method of claim 1, And the ear portion is formed only at both side portions facing each other. The method of claim 1, And the ear portion is formed on all four sides of each of the optical sheets. The method of claim 1, The light guide plate is formed in the liquid crystal display module characterized in that the thickness is gradually smaller toward the light incident portion than the light incident portion where the light is incident. The method of claim 1, And a plurality of dot patterns formed on a lower surface of the light guide plate. The method of claim 1, The support main liquid crystal display module, characterized in that a plurality of coupling grooves are formed to be coupled to the ear. The method of claim 10, The plurality of coupling grooves are deformed according to the position and shape of the ear portion. The method of claim 1, And a reflective sheet disposed on a rear surface of the light guide plate to reflect light leaked to the lower portion of the light guide plate.

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