KR20060058936A - Liquid crystal display - Google Patents

Abstract

The present invention provides a liquid crystal panel, a plurality of lamps arranged at predetermined intervals to irradiate light behind the liquid crystal panel, and a main light diffusing member disposed between the liquid crystal panel and the lamp to diffuse the light of the lamp. And a bottom chassis for accommodating the lamp, the liquid crystal display further comprising an auxiliary light diffusing member positioned between the lamps adjacent to each other to diffuse light. Thereby, the thickness of a liquid crystal display device can be made thin and the liquid crystal display device which prevents the flow and the curvature of a main optical calculation member can be provided.

Description

Liquid crystal display

1 is an exploded perspective view of a liquid crystal display according to the present invention;

2 is a cross-sectional view of a liquid crystal display device according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: liquid crystal panel 20: mold frame

30: backlight assembly 31: main light diffusion member

32 lamp 34 auxiliary light diffusing member

35: support groove 40: bottom chassis

50: top chassis

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 device which improves the structure of a backlight assembly to reduce the thickness of the liquid crystal display device and prevents the flow and warpage of the main light diffusion member.

In general, a liquid crystal display is a device for displaying a desired image by adjusting the light transmittance of liquid crystal cells arranged in a matrix according to image signal information. The liquid crystal panel forms an image.

The liquid crystal display includes a liquid crystal panel in which liquid crystal cells forming a pixel unit are arranged in a matrix, a driver integrated circuit for driving the liquid crystal cells, and a backlight assembly for uniformly supplying light to the liquid crystal panel.

In the backlight assembly, a lamp, which is a light source, is disposed directly on the rear surface of the liquid crystal panel to irradiate light to the liquid crystal panel. It is divided into the edge (edge) method for irradiating light.

The direct method is mainly used in large liquid crystal display devices that require high brightness due to the low light uniformity and durability but good light utilization efficiency compared to the edge method.

The direct type backlight assembly includes a lamp for illuminating the bottom chassis and irradiating light, a lamp support member for supporting the lamp, a main light diffusing member disposed between the lamp and the liquid crystal panel to diffuse and concentrate light, and a main light diffusing member. And a support column spaced apart from and supported by the lamp.

However, in the conventional direct liquid crystal display device, in order to maintain the uniformity and brightness of the light required in the liquid crystal display device, a constant distance must be maintained between the lamp and the main light diffusing member, so that the thickness of the liquid crystal display device is There is a problem of thickening. In addition, the support column for supporting the main light diffusing member is formed in a conical shape there is a problem that the main light diffusing member is bent or flow by supporting the main light diffusing member as a vertex portion.

Accordingly, an object of the present invention is to provide a liquid crystal display device having a thin thickness and capable of preventing the flow and warpage of the main light diffusing member.

According to the present invention, there is provided a liquid crystal panel and a plurality of lamps arranged at a predetermined distance from each other to irradiate light behind the liquid crystal panel, and disposed between the liquid crystal panel and the lamp to provide light of the lamp. A liquid crystal display comprising a main light diffusing member for diffusing and a bottom chassis for accommodating the lamp, the liquid crystal display further comprising an auxiliary light diffusing member positioned between the adjacent lamps and diffusing light. Is achieved by.

The apparatus may further include a mold frame for supporting the liquid crystal panel spaced apart from the lamp. The auxiliary light diffusing member may be supported by supporting grooves provided at both ends of either the bottom chassis and the mold frame. The upper and lower surfaces are preferably supported by the main light diffusing member and the bottom chassis, respectively.

In addition, the auxiliary light diffusing member is preferably arranged in the longitudinal direction of the lamp in a rectangular pillar shape.

        In addition, the auxiliary light diffusing member preferably guides the light generated from the lamp to the rear surface of the main light diffusing member.

In addition, the auxiliary light diffusion member is preferably made of polymethylmethacrylate (Polymethylmethacrylate).                     

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

Prior to the description, the liquid crystal display device shown in the present specification will be schematically shown with the feature that it is applied to the liquid crystal display device having a direct type backlight assembly.

1 is an exploded perspective view of a liquid crystal display according to the present invention, and FIG. 2 is a cross-sectional view of the liquid crystal display according to the present invention.

As shown in FIG. 1, a liquid crystal display device according to an exemplary embodiment of the present invention includes a liquid crystal panel 10 for forming an image, a driver integrated circuit (not shown) for driving the liquid crystal panel 10, and a liquid crystal. A mold frame 20 supporting the edge of the panel 10, a backlight assembly 30 for irradiating light to the rear surface of the liquid crystal panel 10, and a backlight assembly 30 are accommodated to support the mold frame 20. A bottom chassis 40 and a top chassis 50 coupled to the bottom chassis 40 to cover the entire surface of the liquid crystal panel 10 are included.

The liquid crystal panel 10 is injected between the thin film transistor substrate 11, the color filter substrate 12 attached to face the thin film transistor substrate 11, and the thin film transistor substrate 11 and the color filter substrate 12. It includes a liquid crystal (not shown). The liquid crystal (not shown) is injected between the thin film transistor substrate 11 and the color filter substrate 12 and then sealed. In addition, the liquid crystal panel 10 further includes a front polarizer 13 attached to the front surface of the color filter substrate 12 and a rear polarizer 14 attached to the rear surface of the thin film transistor substrate 11. The liquid crystal panel 10 is arranged in a matrix form of the liquid crystal cells forming a pixel unit, and forms an image by adjusting the light transmittance of the liquid crystal cells in accordance with the image signal information transmitted from the driver integrated circuit (not shown).

In the thin film transistor substrate 11, a plurality of gate lines and a plurality of data lines are formed in a matrix form, and pixel electrodes and thin film transistors (TFTs) are formed at intersections of the gate lines and the data lines. The signal voltage applied through the thin film transistor is applied to the liquid crystal (not shown) by the pixel electrode, and the liquid crystal (not shown) is aligned according to the signal voltage to determine the light transmittance.

The color filter substrate 12 is formed with a color filter made of RGB pixels through which light passes and a predetermined color, and a transparent common electrode (ITO). The color filter substrate 12 has a smaller area than the thin film transistor substrate 11, and a portion where the color filter substrate 12 and the thin film transistor substrate 11 overlap with each other becomes a display area of the liquid crystal panel 10 and does not overlap. The peripheral area of the display area becomes the non-display area of the liquid crystal panel.

The front flat plate 13 and the rear polarizer 14 are arranged to cross-polarize each other, the rear polarizer 14 polarizes the light incident on the liquid crystal panel 10, and the front polarizer 13 serves as an analyzer. .

The driver integrated circuit (not shown) has terminals for electrically connecting, and ends of the gate wiring and the data wiring of the thin film transistor substrate 11 mounted on the thin film transistor substrate 11 and extending from the display area to the non-display area. Is connected to.

The mold frame 20 is formed along the edge of the liquid crystal panel 10 and has a substantially rectangular shape and supports the liquid crystal panel 10 spaced apart from the backlight assembly 30.                     

The backlight assembly 30 includes a main light diffusing member 31 disposed in parallel with a rear surface of the liquid crystal panel 10, and a lamp 32 which irradiates light to the rear surface of the liquid crystal panel 10 through the main light diffusing member 31. And a lamp support member 33 fixed to the bottom chassis 40 to support the lamp 32 and provided between the lamp 32 and the bottom chassis 40 to uniformly irradiate light emitted from the lamp 32. Spread it includes a reflective sheet (not shown) to be directed to the back of the liquid crystal panel 10.

The main light diffusing member 31 is a diffusion sheet that partially diffuses the light irradiated from the lamp 32 to the liquid crystal panel 10 and diffuses the light so that spots do not occur in the liquid crystal panel 10 to further improve the uniformity of the light. 311 and a prism sheet 312 that improves the luminance by allowing the light passing through the diffusion sheet 311 to proceed vertically. In addition, the protective sheet 313 to protect the diffusion sheet 311 and the prism sheet 312 sensitive to dust and scratches and to prevent the external impact or foreign matter inflow.

The lamp 32 emits light, and an electrode part (not shown) connected to an inverter (not shown) and receiving power is formed at an end of the lamp. The lamp 32 is supported by the lamp support member 33.

The reflective sheet (not shown) is positioned between the bottom chassis 40 and the lamp 32 and attached to the inner bottom and side surfaces of the bottom chassis 40. By reflecting the light irradiated from the lamp 32 as much as possible to increase the efficiency of the lamp 32, it is possible to prevent the local dark portion is generated in the display area. In addition, by reflecting the light irradiated in the opposite direction of the liquid crystal panel 10 back to the main light diffusion member 31 to reduce the loss of light, the uniformity of light transmitted from the main light synthesis member 31 toward the liquid crystal panel 10. Contribute to improving.                     

The top chassis 50 has a top front part 52 having a display window 53 and a main body part 51 housing the mold frame 20 and the bottom chassis 40 so that the effective surface of the liquid crystal panel 10 is exposed to the outside. Has

Here, the liquid crystal panel 10 further includes an auxiliary light diffusing member 34 between the plurality of lamps 32 arranged at predetermined intervals to irradiate light behind the liquid crystal panel 10. Both ends of the auxiliary light diffusing member 34 are supported by the support grooves 35 provided at both sides of the bottom chassis 40 or the mold frame 20, and the upper surface of the auxiliary light diffusing member 31 and the bottom surface of the auxiliary light diffusing member 34 are bottomed. It is supported by the chassis 40, respectively. When the reflective sheet (not shown) is attached to the bottom chassis 40, the bottom surface of the auxiliary light diffusing member 34 is supported on the reflective sheet (not shown).

The auxiliary light diffusing member 34 guides the light generated from the lamp 32 to the rear surface of the main light diffusing member 31. The auxiliary light diffusing member 34 diffuses the light irradiated from the lamp 32 to improve the uniformity of the light, and improves the luminance by inducing the light directed toward the back of the main light diffusing member 31 to maintain a constant straight line. Let's do it. As the material of the auxiliary optical acid member 34, polymethyl methacrylate (Polymethylmethancrylate) having a high strength and not easily deformed or broken and having a good transmittance may be used. Of course, the material of the auxiliary optical acid member 34 is not limited to the above material, and may be used as long as the material irradiated and scattered from the lamp 32 can maintain light uniformity and brightness. Do.

It can also be manufactured by one material, and a plurality of materials can be manufactured in layers, such as the main optical learning member 31. In addition, a protective layer may be provided to prevent external impact or inflow of foreign substances.

The auxiliary light diffusing member 34 fills between the lamps 32 while being arranged in the longitudinal direction of the lamp 32 in a rectangular pillar shape. The shape of the auxiliary light diffusing member 34 is not limited to the rectangular pillar, but may be manufactured in a polygonal or amorphous shape that may fill the gap between the lamps 32. In addition, the main light diffusing member support column (not shown) may support the main light diffusing member together with the auxiliary light diffusing member 34 while passing through the auxiliary light diffusing member 34, and has only the auxiliary light diffusing member 34 without the supporting column. The diffusion member 31 may be supported.

With this configuration, the operation and effects of the liquid crystal display according to the exemplary embodiment of the present invention will be described. The light irradiated from the lamp 32 by the auxiliary light diffusing member 34 provided between the lamps 32 is diffused and dispersed. It is led to the back of the main light diffusing member 31. The light irradiated to the rear of the lamp 32 is reflected by a reflecting sheet (not shown) to pass through the auxiliary light diffusing member 34, and the light irradiated to the side passes through the auxiliary overdiffusion member 34 to uniform the light. It is irradiated to the back surface of the main light diffusing member 31 while maintaining performance and brightness. Due to the diffusion and dispersion of the light by the auxiliary light diffusing members 34 filled between the adjacent lamps 32, the width of the predetermined interval between the lamps 32 and the main light diffusing members 31 is reduced, thereby reducing the liquid crystal display. The device becomes thinner. Then, the lamp 32 is closer to the liquid crystal panel 10, so that the brightness of the light is improved.

In addition, the margin of thickness control of the liquid crystal panel 10 is increased, thereby enabling product implementation of various thicknesses and characteristics.

On the other hand, it is possible to implement a liquid crystal display device having the same performance while using a smaller number of lamps 32 than the conventional backlight assembly 30.

In addition, the upper surface of the auxiliary light diffusing member 34 is supported by the main light diffusing member 31, preventing the main light diffusing member 31 from flowing and warping, and the inside of the backlight assembly is filled with the auxiliary light diffusing member 34 The robustness of the liquid crystal display device is improved.

As described above, according to the present invention, the thickness of the liquid crystal display device can be reduced by the auxiliary light diffusing members between the lamps, and a liquid crystal display device can be provided which prevents the flow and warpage of the main light diffusing members.

Claims (5)

A liquid crystal panel, a plurality of lamps arranged at predetermined intervals to irradiate light behind the liquid crystal panel, a main light diffusing member disposed between the liquid crystal panel and the lamps to diffuse light of the lamps, and the lamps In the liquid crystal display comprising a bottom chassis for receiving the, And an auxiliary light diffusing member positioned between the lamps adjacent to each other to diffuse light. The method of claim 1, Further comprising a mold frame for supporting the liquid crystal panel spaced apart from the lamp, Both ends of the auxiliary light diffusing member are supported by support grooves provided at both sides of the bottom chassis and the mold frame, and the top and bottom surfaces are respectively supported by the main light diffusing member and the bottom chassis. Liquid crystal display device. The method of claim 1, And the auxiliary light diffusing member is arranged in the longitudinal direction of the lamp in a rectangular pillar shape.         The method of claim 1,         And the auxiliary light diffusing member guides the light generated from the lamp to the rear surface of the main light diffusing member. The method of claim 1, The auxiliary light diffusing member is made of polymethyl methacrylate (Polymethylmethacrylate).

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