KR20060065132A - Liquid crystal display module - Google Patents

Abstract

The present invention provides a liquid crystal display module capable of fixing and supporting an optical member.

The liquid crystal display module according to the present invention includes a light guide plate having at least one ear portion formed at a side thereof, and a support main having a light guide plate accommodating the light guide plate and fitting into the ear portion.

Description

Liquid Crystal Display Module             

1 is a view showing a liquid crystal display module according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line A-A 'of FIG. 1; FIG.

3 is a view showing an example in which a surface of a light guide plate is prism treated.

4 is a view showing a liquid crystal display module according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view taken along the line BB ′ in FIG. 4; FIG.

FIG. 6 is a view illustrating the light guide plate of FIG. 4 as viewed from the liquid crystal panel direction. FIG.

7 is a view showing a liquid crystal display module according to a third embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

2, 52: Case top 4, 52: Pad area

6, 56: liquid crystal panel 8, 58: tape carrier package

10, 60: drive integrated circuit 14, 64: optical sheet

16, 66: light guide plate 18, 68: reflector plate

20, 70: lamp 22, 72: lamp housing

24, 74: support main 28: extension

30: prism 78, 128: ear                 

80, 130: fixing groove

The present invention relates to a liquid crystal display module, and more particularly, to provide a liquid crystal display module capable of fixing and supporting an optical member.

In general, a liquid crystal display (LCD) is a representative flat panel display that displays an image by adjusting the transmission amount of the light beam to correspond to an image signal. In particular, liquid crystal display devices have tended to be gradually widened due to their light weight, thinness, and low power consumption. In accordance with this trend, liquid crystal displays have been applied to display devices of office automation devices and notebook computers. In addition, in order to meet the needs of users, liquid crystal display devices are progressing toward larger screens, higher definition, and lower power consumption.

Meanwhile, the liquid crystal display device displays a desired image on a screen by adjusting the transmission amount of the light beam according to an image signal applied to a plurality of control switches arranged in a matrix form.

Since the liquid crystal display device is not a self-luminous display device, a light source such as a back light is required. There are two types of backlight for the liquid crystal display device, a direct type type and an edge type type.                         

In the edge type method, a fluorescent lamp is installed outside the flat plate, and light is incident from the fluorescent lamp onto the entire surface of the liquid crystal panel using a transparent light guide plate. In addition, since the edge type backlight unit uses a light guide plate, the thickness of the backlight unit is relatively thin. The direct type method is a method of directly dimming the front surface of the liquid crystal panel by placing a light source on the rear surface of the liquid crystal panel. Thus, a plurality of light sources may be disposed to increase luminance and widen the light emitting surface as compared to the edge type method. However, in the case of the edge type, there is a disadvantage that the weight is heavier than the direct type backlight unit due to the use of the light guide plate, and the overall light efficiency of the backlight unit is lowered due to the light absorbed and extinguished in the light guide plate. In addition, in the case of the direct type, the light efficiency is better than the edge type, but high power consumption and heat generation due to the use of multiple lamps are pointed out as disadvantages. In addition, since the light guide plate does not exist between the lamp and the optical sheet, the underground type has a predetermined distance between the lamp and the optical sheet, thereby increasing the thickness of the backlight unit.

Such liquid crystal display devices include a light source such as a backlight, optical sheets for generating light from the light source toward the liquid crystal panel to improve light efficiency, a light guide plate that is a light path for directing light from the light source toward the liquid crystal panel, Cases are needed for supporting and fixing. To this end, liquid crystal display devices are laminated to the case by stacking the above-described light source, optical sheet, light guide plate, etc. on the back of the liquid crystal panel. As such, the quality of the liquid crystal display device may be improved according to the method of fixing the optical member to the case, and therefore, a method of more effectively fixing the backlight unit including the optical member and the optical sheet inside the backlight unit should be devised.

Accordingly, an object of the present invention is to provide a liquid crystal display module capable of fixing and supporting an optical member.

In order to achieve the above object, the liquid crystal display module according to the present invention comprises a light guide plate having at least one ear portion formed on the side; In addition to receiving the light guide plate, a support main having a fixing groove matching the ear portion is provided.

A liquid crystal panel for displaying an image using light emitted from the light guide plate, at least one lamp for irradiating light to the light guide plate, a lamp housing for wrapping the lamp and reflecting light from the lamp, and the light guide plate A reflective sheet for reflecting the light emitted to the back of the light guide plate, and at least one optical sheet positioned between the light guide plate and the liquid crystal panel.

The lamp is located at one side of the light guide plate, and the ear portion is formed at the other side of the light guide plate.

A liquid crystal display module according to a second embodiment of the present invention includes a light guide plate having at least one fixing groove formed on a side thereof; In addition to receiving the light guide plate, a support main having an ear portion formed in the fixing groove is provided.

A liquid crystal panel for displaying an image using light emitted from the light guide plate, at least one lamp for irradiating light to the light guide plate, a lamp housing for wrapping the lamp and reflecting light from the lamp, and the light guide plate A reflective sheet for reflecting the light emitted to the back of the light guide plate, and at least one optical sheet positioned between the light guide plate and the liquid crystal panel.

The lamp is located at one side of the light guide plate, and the fixing groove is formed at the other side of the light guide plate.

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

Hereinafter, a liquid crystal display module according to the present invention will be described in detail with reference to FIGS. 1 to 6.

1 is a view showing a liquid crystal display module according to a first embodiment of the present invention.

Referring to FIG. 1, a liquid crystal display module according to the present invention includes a support main 24, a backlight unit and a liquid crystal panel 6 stacked in the support main 24, and a support main 24. A case arranged to support the liquid crystal panel 6 and to surround the edges of the liquid crystal panel 6 and the side surfaces of the support main 24 and the guide panel 7 for fixing the optical sheets 14 of the backlight unit. Case Top (2) is provided.

The support main 24 is a mold, and a side wall thereof is formed into a stepped stepped surface, on which a seating portion on which the optical sheets 14a, 14b, 14c, and 14d are mounted is formed. In addition, in order to fix and support the light guide plate 16 seated on the seating part, the support main 24 is formed with an extension 28 protruding to the upper edge of the light guide plate 16. The extension 28 presses the upper edge of the light guide plate 16 to fix and support the light guide plate 16. The innermost layer of the support main 24 has a backlight comprising a reflective sheet 18, a light guide plate 16, a plurality of optical sheets 14, a lamp 20 and a lamp housing 22 surrounding the lamp. The unit is mounted.

The backlight unit includes a lamp 20, a lamp housing 22 surrounding the lamp, a light guide plate 16 for propagating light incident from the lamp toward the liquid crystal panel 6, and a rear surface of the light guide plate 16. A reflective sheet 18 and optical sheets 14 stacked on the light guide plate 16 are provided.

The light guide plate 16 provides a path of light so that the light generated from the lamp 20 can spread to the lower front surface of the liquid crystal panel 6. The light guide plate 16 is mainly made of Poly Methyl Metharylate Acrylate (PMMA). The lamp 20 and the lamp housing 22 are positioned at one side of the light guide plate 16 to be used as a light source of the liquid crystal panel 6. The light guide plate 16 is supported and fixed by a support main 24 provided on the rear surface with the reflection plate therebetween.

Light generated by the lamp 20 is incident on the light guide plate 16 through an incident surface formed on the side of the light guide plate 16.

The lamp housing 22 is formed to surround the lamp 20, and reflects light generated from the lamp 20 toward an incident surface formed on the side of the light guide plate 16.

The liquid crystal panel 6 is composed of an upper substrate and a lower substrate, not shown. The liquid crystal is injected between the upper substrate and the lower substrate of the liquid crystal panel 6 and has a spacer (not shown) for maintaining a constant gap between the upper substrate and the lower substrate. On the upper substrate of the liquid crystal panel 6, a color filter, a common electrode, a black matrix, and the like, which are not shown, are formed. In addition, signal lines such as data lines and gate lines (not shown) are formed on the lower substrate of the liquid crystal panel 6, and thin film transistors (TFTs) are formed at the intersections of the data lines and the gate lines. The thin film transistor switches the data signal to be transmitted from the data line toward the liquid crystal cell in response to the scan signal (or gate pulse) from the gate line. The pixel electrode is formed in the pixel region between the data line and the gate line. In addition, a signal line pad region 4 to which data lines and gate lines are respectively connected is formed at one side of the liquid crystal panel 6, and in this pad region 4, driver driving integrated for applying a driving signal to the thin film transistor. A tape carrier package 8 in which the circuit 10 is mounted is attached. This tape carrier package supplies a data signal from the driver driver integrated circuit 10 to the data lines. In addition, the scan signal is supplied to the gate lines.

The upper polarizing sheet 4a is attached to the upper substrate of the liquid crystal panel 6, and the lower polarizing sheet 4b is attached to the rear surface of the lower substrate.

The case top 2 is manufactured in the form of a square strip having a flat portion and a side portion bent at a right angle. The case top 2 is fastened to the edge of the liquid crystal panel 6 and the support main 24 to be wrapped.

The guide panel 7 supports the liquid crystal panel 6 and is fixed to the upper surface of the support main 24 to fix the optical sheets 14. To this end, the side of the guide panel (7) has a fixing portion for fixing the liquid crystal panel (6), the back is formed with a projection groove into which the projection of the support main 24 is inserted.

The reflective sheet 18 serves to reduce light loss by re-reflecting light incident to itself through the rear surface of the light guide plate 16 toward the light guide plate 16. That is, when the light from the lamp is incident on the light guide plate 16, the light traveling to the lower surface and the side surface of the light guide plate 16 is reflected by the reflective sheet 18 to travel toward the front surface.

When the light incident on the liquid crystal panel 6 is vertical, the light efficiency is increased. The plurality of optical sheets 14 generates light emitted from the light guide plate 16 vertically to improve light efficiency. To this end, two sheets of light diffusing the light emitted from the light guide plate 16 to the entire area, the lower diffusion sheet 14d and the propagation angle of the light diffused by the lower diffusion sheet 14d are raised perpendicularly to the liquid crystal panel 6. Top prism sheets 14b and 14c and upper diffusion sheet 14a for diffusing light via the two prism sheets 14b and 14c. Accordingly, the light emitted from the light guide plate 16 is incident on the liquid crystal panel via the plurality of optical sheets 14.

In this method of assembling the liquid crystal display module, the reflective sheet 18 and the light guide plate 16 are sequentially stacked on the support main 24. Then, the optical sheets 14 are stacked on the seating portion of the support main 24.

After the optical sheets 14 are assembled on the support main 24, the liquid crystal panel is mounted on the optical sheets 14. Then, the case top 2 is assembled to surround the edge of the fixed liquid crystal panel 6 and the side surface of the support main 24.                     

FIG. 2 is a cross-sectional view of FIG. 1 taken along the line A-A '.

Referring to FIG. 2, the top of the case 2, the first polarizing sheet 4a, the liquid crystal panel 6, the second polarizing sheet 4b, the guide panel 7, the optical sheets 14, and the light guide plate from the top. (16), the reflection sheet 18 and the support main 24 are laminated in order. In addition, the lamp 20 and the lamp housing 22 are located in the invisible portion of the cross section and the direction looking at FIG. 2. As shown in FIG. 2, the light guide plate 16 is supported by the extension 28 of the support main 24.

3 illustrates an example in which a surface of the light guide plate is prism-treated.

2 and 3, in the first embodiment, the extension 28 of the support main 24 directly presses the light guide plate 16. Therefore, when the prism 30 is formed on the front surface of the light guide plate 16 as shown in FIG. 3, the prism 30 is pressurized by the extension part 28. This is a small problem in the fixed state, but when the movement or vibration occurs, the prism 30 is broken or broken occurs. As a result, when a deformation occurs in the shape of the prism 30, a gap may occur between the light guide plate 16 and the support main 24, which may cause a problem that the light guide plate 16 is not fixed.

It is intended to suggest a method for improving this through the second embodiment of the present invention.

4 is a view showing a liquid crystal display module according to a second embodiment of the present invention.

Hereinafter, detailed description of the same configuration as the first embodiment of the present invention will be omitted.

Referring to FIG. 4, the liquid crystal display module according to the present invention is disposed on the support main 74, the backlight unit and the liquid crystal panel 56 stacked inside the support main 74, and the support main 74. A guide panel 57 for supporting the liquid crystal panel 56 and fixing the optical sheets 64 of the backlight unit, and a case top 52 for wrapping the edge of the liquid crystal panel 56 and the side surface of the support main 74. ).

The support main 74 is a mold, and the side wall inside thereof is formed into a stepped stepped surface, on which a seating portion on which the optical sheets 64a, 64b, 64c, and 64d are mounted is formed. In addition, the support main 74 is formed with a fixing groove 80 for mating with the ear portion 78 formed in the light guide plate 66 in order to fix and support the light guide plate 66 seated on the mounting portion. The innermost layer of the support main 74 has a backlight comprising a reflective sheet 68, a light guide plate 66, a plurality of optical sheets 64, a lamp 70 and a lamp housing 72 surrounding the lamp. The unit is mounted.

The backlight unit includes a lamp 70, a lamp housing 72 surrounding the lamp, a light guide plate 66 for propagating light incident from the lamp toward the liquid crystal panel 56, and a rear surface of the light guide plate 66. A reflective sheet 68 and optical sheets 64 stacked on the light guide plate 66 are provided.

The light guide plate 66 provides a path of light so that the light generated from the lamp 70 spreads on the lower front surface of the liquid crystal panel 56. This light guide plate 66 is mainly made of poly methyl methacrylate (PMMA). A lamp 70 and a lamp housing 72 are positioned at one side of the light guide plate 66 to be used as a light source of the liquid crystal panel 56. The light guide plate 66 is supported and fixed by the support main 74 provided on the rear surface with the reflection plate therebetween. To this end, an ear portion 78 having a stepped portion formed on the side of the liquid crystal panel 56 is formed on a side surface of the light guide plate 66 where the lamp 70 is not located. The ear portion 78 is fixed to the fixing groove 80 formed to correspond to the support main 74 to fix the light guide plate 66 to the support main 74. In addition, the ear portion 78 is molded of the same material as the light guide plate 66 at the time of molding the light guide plate 66. It is desirable that the ear portion 78 be as small as possible. This is different depending on the size of the liquid crystal panel 56, but since the ear portion 78 is made of the same material as the light guide plate 66, if a plurality of ear portions 78 are formed or the length of the projection is long, light leakage and refraction may occur. There is concern. Here, in the case of the structure in which the lamp 70 is assembled on both sides of the light guide plate 66, the light guide plate 66 is concave in the center portion between the lamps 70, that is, formed in the shape of a bow tie, in this case also the lamps Ear portions 78 are formed on the surface where 70 is not located. This protrusion may be formed in large numbers according to the size and support strength of the liquid crystal panel 56.

FIG. 5 is a cross-sectional view of FIG. 4 taken along the line BB ′.

Referring to FIG. 5, the top of the case 52, the first polarizing sheet 54a, the liquid crystal panel 56, the second polarizing sheet 54b, the guide panel 57, the optical sheets 64, and the light guide plate from the top. 66, the reflection sheet 68 and the support main 74 are laminated in order. In addition, the lamp 70 and the lamp housing 72 are located in the invisible portion of the direction and the cross-sectional view of FIG. 5.

The left and right inner surfaces of the light guide plate 66 and the left and right inner surfaces of the support main 74 shown in FIG. 5 are provided with an ear portion 78 and a fixing groove 80 corresponding thereto.

FIG. 6 is a view showing the light guide plate of FIG. 4 viewed from the direction of the liquid crystal panel, and FIG. 6 is a view showing the light guide plate having a pair of ear parts.

The ear portion 78 is preferably formed on the side of the light guide plate 66 in which the lamp 70 is not located. In addition, the shape of the stepped portion may be changed if the shape is to be engaged with the fixing groove 80 to support the light guide plate. In addition, when the light guide plate 66 and the support main 74 according to the second embodiment of the present invention are applied to the large-screen liquid crystal display module, a plurality of ear parts 78 may be formed.

7 is a diagram illustrating a liquid crystal display module according to a third embodiment of the present invention.

In the liquid crystal display module according to the third embodiment of the present invention, unlike the second embodiment, an ear part is formed in the support main, and a fixing groove corresponding thereto is formed in the light guide plate. Hereinafter, detailed description of the same configuration and effects as those of the second embodiment will be omitted.

Referring to FIG. 7, a liquid crystal display module according to a third embodiment of the present invention includes a support main 124, a backlight unit and a liquid crystal panel 106 stacked inside the support main 124, and a support main 124. The guide panel 107 and the edge of the liquid crystal panel 106 and the side surface of the support main 124 which are disposed on the support panel 107 to support the liquid crystal panel 106 and to fix the optical sheets 114 of the backlight unit. It has a case top 102 for.

In the support main 124, an ear portion 128 formed in the light guide plate 66 of the second embodiment is formed on the inner side of the support main 124, and a fixing groove 130 is formed in the light guide plate 130 to match the support main 124. However, in the third embodiment, in order to abut the ear 128 and the fixing groove 130, the direction of the ear end 128 is formed to face the rear surface of the light guide plate 116, unlike the second embodiment.

 As described above, the liquid crystal display module according to the present invention forms an ear portion and a fixing groove for fixing and supporting the light guide plate in the light guide plate and the support main, respectively. Accordingly, the liquid crystal display module of the present invention can be fixed and supported by the optical member. In addition, by forming an ear at the side of the light guide plate, the edge of the light guide plate can be used, and unnecessary portions of the light guide plate can be reduced, thereby reducing the weight of the liquid crystal display module. In addition, since the ear portion formed on the side of the light guide plate does not directly press the light guide plate front portion, it is possible to form a prism or the like on the front surface of the light guide plate.

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 (6)

A light guide plate having at least one ear portion formed on a side surface thereof; A liquid crystal display module comprising a support main accommodating the light guide plate and having a fixing groove matching the ear portion. The method of claim 1, A liquid crystal panel which displays an image using light emitted from the light guide plate; At least one lamp for irradiating light to the light guide plate; A lamp housing that wraps the lamp and reflects light from the lamp, A reflection sheet for reflecting the light emitted to the rear surface of the light guide plate to the light guide plate; And at least one optical sheet disposed between the light guide plate and the liquid crystal panel. The method of claim 2, The lamp is located on one side of the light guide plate, And the ear part is formed at the other side of the light guide plate. A light guide plate having at least one fixing groove formed on a side thereof; A liquid crystal display module comprising a support main which accommodates the light guide plate and has an ear portion that matches the fixing groove. The method of claim 4, wherein A liquid crystal panel which displays an image using light emitted from the light guide plate; At least one lamp for irradiating light to the light guide plate; A lamp housing that wraps the lamp and reflects light from the lamp, A reflection sheet for reflecting the light emitted to the rear surface of the light guide plate to the light guide plate; And at least one optical sheet disposed between the light guide plate and the liquid crystal panel. The method of claim 5, wherein The lamp is located on one side of the light guide plate, The fixing groove is formed on the other side of the light guide plate.

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