KR20030095908A - Liquid crystal display module - Google Patents

Abstract

PURPOSE: A liquid crystal display module is provided to solve darkness of an edge part of a liquid crystal display by applying a light guide plate without a stopper and fix the light guide plate and protect a lamp by applying a lamp housing acting as a stopper. CONSTITUTION: A lamp generates an optical beam. A lamp housing(72) is formed to shield the lamp for improving the optical efficiency. A light guide plate(71) is formed to guide the optical beam generated from the lamp without a stopper. A support main(70) supports a back light unit without a stopper. The lamp housing includes protrusions which are bent to shield the lamp at a lower part of the lamp housing and a bent part which is bent to shield the lamp at an upper part of the lamp housing. The protrusions and the bent part of the lamp housing prevent the light guide plate from directly contacting with the lamp, and absorb a shock applied to the lamp by the light guide plate.

Description

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 device, and more particularly, to a liquid crystal display module which reduces brightness deterioration at an edge portion and prevents lamp breakage.

Typically, a liquid crystal display (hereinafter referred to as "LCD") is a plurality of liquid crystal cells arranged in a matrix form and a plurality of control switches for switching the video signal to be supplied to each of these liquid crystal cells The transmission amount of the light beam supplied from the backlight unit is adjusted by the configured liquid crystal panel to display a desired image on the screen.

Referring to FIG. 1, a liquid crystal display module according to the related art includes a main frame 10 in which liquid crystal display devices are accommodated, a backlight unit 13 mounted horizontally on an upper portion of the support main 10, and In addition, the optical sheets 14 mounted horizontally on the upper part of the backlight unit 13, the board assembly 19 mounted horizontally on the upper part of the optical sheets 14, the edges of the board assembly 19 and the support main A top case 20 surrounding the side of the top 10 and a bottom cover 9 in contact with the side of the top case 20 to surround the bottom surface of the LCD module.

The support main 10 is made of a mold, a metal, etc., and serves to fix and support the backlight unit 13. The backlight unit 13 is attached to the lamp housing 2 in which the lamp 12 is mounted, and the light guide plate 11 and the light guide plate 11 for converting light incident from the lamp 12 into a surface light source. It includes optical sheets 14 for increasing the light efficiency incident toward (6). Here, the optical sheets 14 are stacked in a plurality of sheets, such as a diffusion sheet, a prism sheet, and a protective sheet. In the liquid crystal panel 6, liquid crystal is injected between two glass substrates each having a polarizing plate attached thereto, and each of the liquid crystal pixel cells arranged in a matrix form is driven by a thin film transistor (TFT). Between the signal line pad 7 formed at the left edge of the liquid crystal panel 6 and the printed circuit board 8 provided below the liquid crystal panel 10, a drive integrated circuit ( A tape carrier package (hereinafter referred to as "TCP") 5 on which an integrated circuit: "IC" 3 is mounted is installed. The top case 20 and the bottom cover 9 are fixed to each other by screws (not shown) with their side surfaces overlapping each other.

The backlight unit 13 includes a lamp 12 for generating a light beam, a light guide plate 11 having a structure that becomes thinner in order to guide the light beam generated in the lamp 12 toward the liquid crystal panel 6, and a lamp ( On the lamp housing 2 formed to increase the light efficiency of the light 12 and the bottom and side surfaces of the light guide plate 11, a reflector (not shown) is formed to allow the light beam generated by the lamp 12 to travel to the liquid crystal panel. . The lamp 12 is configured to combine the "U" shaped lamp housing 2 of metal material to increase the light efficiency. The lamp 12 and the lamp housing 2 may be combined to be referred to as a "lamp assembly". The lamp assembly is attached to an edge of the light guide plate 11 to form the backlight unit 13.

2 to 4, a stepped stopper 15 is engaged with the stepped stopper 16 of the support main 10 at the edge of the light guide plate 11 of the backlight unit according to the related art. The lamp housing 2 of the conventional backlight unit surrounds the lamp 12 in a “U” shape as shown in FIGS. 3 and 4 and stops the light leakage between the light guide plate 11 and the lamp 12. It is formed in a structure surrounding a portion of the bottom. Therefore, when the light guide plate 11 moves inside the liquid crystal display device, the light guide plate 11 directly touches the lamp 12. As a result, the stoppers 15 and 16 are provided to prevent the light guide plate 11 from being pushed toward the lamp 12 to damage the lamp 12. That is, the stoppers 15 and 16 prevent the light guide plate 11 from moving when the shock is applied to the liquid crystal display, thereby preventing the lamp 12 from being damaged.

However, the stopper 15 of the conventional backlight unit illustrated in FIG. 5 is formed on the side of the edge portion of the light guide plate 11 in contact with the lamp 12 so that the support main meshes with the stopper 15 of the light guide plate 11. A stopper (not shown) partially blocks the light beam 52 generated from the lamp 12. As a result, the conventional liquid crystal display has a dark section at the edge portion where the stopper is located. In addition, the stopper 65 of the backlight unit of another conventional type shown in FIG. 6 is formed on the side surface of the light guide plate 61 far from the lamp. At this time, the light guide plate 61 has a structure in which the thickness becomes relatively thinner toward the farther from the lamp 12. Therefore, the liquid crystal display of this type has another problem in that the stopper 65 portion of the light guide plate 61 is easily damaged when a predetermined shock is applied. Therefore, the conventional liquid crystal display device has a problem of causing darkening of the edge portion or damage of the lamp.

Accordingly, it is an object of the present invention to provide a liquid crystal display module that is to reduce the decrease in brightness at the edge portion and to prevent lamp breakage.

1 is a perspective view showing a liquid crystal display module according to the prior art.

FIG. 2 is a perspective view illustrating a backlight unit and a support main of the liquid crystal display module illustrated in FIG. 1.

3 is a cross-sectional view taken along the line AA ′ of FIG. 2.

FIG. 4 is a perspective view briefly illustrating a backlight unit and a support main of the liquid crystal display module of FIG. 2.

5 is a perspective view illustrating a stopper portion of the backlight unit of FIG. 2.

6 is a perspective view illustrating another stopper part of the conventional backlight unit.

7 is a perspective view illustrating a backlight unit and a support main according to an exemplary embodiment of the present invention.

8 is a perspective view illustrating a backlight unit according to a first embodiment of the present invention.

FIG. 9 is a cross-sectional view illustrating the lamp housing according to the first embodiment of the present disclosure, taken along the line BB ′ of FIG. 8.

10 is an exploded perspective view illustrating a backlight unit according to a first embodiment of the present invention.

11 is a perspective view illustrating a backlight unit and a support main according to a first embodiment of the present invention.

12 is an exploded perspective view illustrating a backlight unit according to a second embodiment of the present invention.

13 is a perspective view illustrating a backlight unit and a support main according to a second embodiment of the present invention.

14 is an exploded perspective view illustrating a backlight unit according to a third embodiment of the present invention.

15 is a perspective view illustrating a backlight unit and a support main according to a third embodiment of the present invention.

16 is a cross-sectional view illustrating a lamp housing according to a third embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

2,72,122,142: lamp housing 3: drive integrated circuit

5: tape carrier package 6: liquid crystal panel

7: signal line pad 8: printed circuit board

9: bottom cover 10: support main

11,61,71: Light guide plate 12: Lamp

13 backlight unit 14 optical sheet

15,65: Light guide plate stopper 16: Support main stopper

19: board assembly 20: top case

29 cable connector 52 light beam

70: support main 73: support

74a, 74b, 143a, 143b, 144a, 144b: stopper of lamp housing

In order to achieve the above object, the liquid crystal display device module according to the present invention is formed on a lamp housing for irradiating light, a light guide plate having an incident surface opposite to the lamp, a lamp housing surrounding at least a portion of the lamp, and a lamp housing A stopper for suppressing the flow of the light guide plate is provided.

In the present invention, the lamp housing has vertical surface portions facing the lamps on opposite sides of the light guide plate with the lamps interposed therebetween, and horizontal surface portions bent at right angles from the vertical surface portions and opposed in parallel to the top and bottom of the lamps, respectively.

In the present invention, the stopper is bent toward the incident surface of the light guide plate in each of the horizontal surfaces.

In the present invention, the stopper includes an inclined portion bent toward the incidence surface of the light guide plate at both ends of at least one of the horizontal surfaces, and a horizontal extension portion disposed between the inclined portions and extending parallel to the horizontal surface from the horizontal surface.

In the present invention, the stopper has an inclined portion formed to be inclined toward the incident surface of the light guide plate on at least one of the horizontal surfaces.

In the present invention, the horizontal surface on which the inclined portion is formed is characterized in that it overlaps with the bottom portion of the light guide plate.

In the present invention, another horizontal plane facing the horizontal plane on which the inclined portion is formed is characterized in that it overlaps with a portion of the upper surface of the light guide plate.

In the present invention, the stopper is inclined at an angle of approximately 45 degrees from the horizontal surface portion.

In the present invention, both side surfaces of the light guide plate are flat.

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.

A preferred embodiment of the present invention will be described with reference to FIGS. 7 to 16.

Referring to FIG. 7, a liquid crystal display module according to embodiments of the present invention includes a lamp (not shown) that generates a light beam, a lamp housing 72 formed to surround the lamp, and to improve light efficiency, and guide the light beam. It is formed so as to support the backlight unit consisting of a light guide plate 71 without a stopper, the light guide plate 71 and the like, and a support main 70 without a stopper.

Since the liquid crystal display module of the present invention has a structure in which the light guide plate and the stopper of the support main of the conventional liquid crystal display module are removed, a method for protecting the lamp and fixing the light guide plate 71 is required. Accordingly, the liquid crystal display module of the present invention uses a lamp housing having projections that replace the light guide plate and the stopper of the support main.

This will be described in detail with reference to FIGS. 8 to 16.

8 to 11, there is shown a backlight unit and a support main according to a first embodiment of the present invention.

Referring to FIG. 8, the backlight unit according to the first embodiment of the present invention includes a lamp 12 which emits a light beam as a light source, a lamp housing 72 having a stopper surrounding the lamp, and a light guide plate 71 without a stopper. ).

9 to 11, the lamp housing 72 of the backlight unit according to the first embodiment of the present invention surrounds the lamp 12 and the lower portion of the light guide plate 71 below the lamp housing 72. Support portion 75 surrounding the bottom surface, the bent projections (74a, 74b) to surround the lamp in the lower portion of the lamp housing 72, and the bent portion (73) to surround the lamp on the upper portion of the lamp housing 72 ). The supporting part 75 prevents light leakage between the lamp 12 and the light guide plate 71. The projections 74a and 74b and the bent portion 73 have angles θ that are bent within 45 ° in the lamp housing 72 as shown in FIG. 10. The bent portion 73 and the projections 74a and 74b prevent the light guide plate 71 from directly contacting the lamp 12 as shown in FIG. 11, and absorb the impact applied to the lamp 12 by the light guide plate 71. . That is, the bent portion 73 and the protrusions 74a and 74b of the lamp housing 72 serve as a stopper of the backlight unit. Therefore, the liquid crystal display module according to the first embodiment of the present invention includes a light guide plate 71 and a support main 70 without a stopper.

12 to 13, the lamp housing 122 of the backlight unit according to the second embodiment of the present invention surrounds the lamp 12 and surrounds the bottom surface of the light guide plate 71 under the lamp housing 122. The support 125, a curved protrusion 124 to surround the lamp at the lower portion of the lamp housing 122, and a curved curved portion 123 to surround the lamp at the upper portion of the lamp housing 122. The cross section of the backlight unit has the same cross section as the first embodiment of the present invention illustrated in FIG. 9.

The supporting part 125 of the lamp housing 122 prevents light leakage between the lamp 12 and the light guide plate 71. As shown in FIG. 13, the protrusion 124 and the bend 123 have a Θ angle that is bent within 45 ° of the lamp housing 122. The protrusion 124 and the curved portion 123 prevent the light guide plate 71 and the lamp 12 from directly contacting each other, and absorb the shock applied to the lamp 12 by the light guide plate 71. That is, the protrusion 124 and the curved portion 123 of the lamp housing 122 serve as a stopper of the backlight unit. Therefore, the LCD module according to the second embodiment of the present invention includes a light guide plate 71 and a support main 70 without a stopper.

14 to 16, the lamp housing 142 of the backlight unit according to the third embodiment of the present invention surrounds the lamp 12 and surrounds the bottom surface of the light guide plate 71 under the lamp housing 142. Lower support 145, lower protrusions 144a and 144b curved to surround the lamp under the lamp housing 142, and curved upper protrusion 143a to surround the lamp on the upper portion of the lamp housing 142. 143b and an upper support part 147 surrounding the upper surface of the light guide plate 71 on the lamp housing 142. The lower support part 145 and the upper support part 147 prevent light leakage between the lamp 12 and the light guide plate 71. The lower protrusions 144a and 144b and the upper protrusions 143a and 143b have angles θ that are bent within 45 ° in the lamp housing 142 as shown in FIG. 15. The lower protrusions 144a and 144b and the upper protrusions 143a and 143b prevent direct contact between the light guide plate 71 and the lamp 12 as shown in FIG. 16, and the light guide plate 71 is applied to the lamp 12. Absorb the shock. That is, the lower protrusions 144a and 144b and the upper protrusions 143a and 143b of the lamp housing 142 serve as stoppers of the backlight unit. Therefore, the liquid crystal display module according to the third exemplary embodiment of the present invention includes the light guide plate 71 and the support main 70 without the stopper.

Accordingly, the liquid crystal display module of the present invention includes a light guide plate and a support main without a stopper, thereby preventing the light beams generated from the lamps from being blocked, thereby eliminating the darkness of the edge portion of the liquid crystal display device. The lamp housing 72 serving as a stopper secures the light guide plate 71 and protects the lamp 12 from the impact of the light guide plate 71.

As described above, the backlight unit according to the present invention can eliminate the dark portion of the edge portion of the liquid crystal display by adopting the light guide plate from which the stopper is removed, and also employs a lamp housing positioned above and below the light guide plate and acting as a stopper. And protects the lamp from the impact 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 (9)

Lamp for irradiating light, A light guide plate having an incident surface opposite the lamp; A lamp housing surrounding at least a portion of the lamp, And a stopper formed on the lamp housing to suppress the flow of the light guide plate. The method of claim 1, The lamp housing, A vertical surface portion opposed to the lamp on the opposite side of the light guide plate with the lamp interposed therebetween; And a horizontal surface portion each bent at a right angle from the vertical surface portion and facing in parallel to the top and bottom of the lamp. The method of claim 2, The stopper is, And a bending portion toward the entrance surface of the light guide plate in each of the horizontal planes. The method of claim 2, The stopper is, An inclined portion bent toward an incident surface of the light guide plate at an end of at least one of the horizontal surfaces; And a horizontal extension part positioned between the inclined parts and extending from the horizontal plane. The method of claim 2, The stopper is, And an inclined portion formed to be inclined toward the incident surface of the light guide plate on at least one of the horizontal surfaces. The method of claim 5, And the horizontal surface on which the inclined portion is formed overlaps with a portion of the bottom surface of the light guide plate. The method of claim 6, And another horizontal surface facing the horizontal surface on which the inclined portion is formed overlaps with a portion of the upper surface of the light guide plate. The method according to any one of claims 2 to 5, And said stopper is inclined at an angle within approximately 45 [deg.] From the horizontal plane portion. The method of claim 1, And both side surfaces of the light guide plate are flat.