KR20060110652A - Backlight assembly and display apparatus having the same - Google Patents

Abstract

A backlight assembly and a display device having the same are provided to reduce a brightness difference between a region corresponding to lamps and a region between the lamps by providing a container having convex portions diffusing and reflecting light emitted from the lamps to the region between the lamps. Lamps generate light. A container(150) receives the lamps, and has a convex portion at one side. The convex portion protrudes to have a curved shape to reflect light from the lamps. The convex portion is placed between the lamps. The convex portion is formed to extend in a longitudinal direction of the lamps.

Description

BACKLIGHT ASSEMBLY AND DISPLAY APPARATUS HAVING THE SAME}

1 is an exploded perspective view showing a backlight assembly according to an embodiment of the present invention.

2 is a perspective view showing the storage container shown in FIG.

3 is a cross-sectional view taken along the line II ′ of FIG. 1.

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

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

100: backlight assembly 110: lamp

120: diffusion plate 130, 140: side mold

150: storage container 153: convex portion

154: support 200: display panel assembly

300: top chassis 400: liquid crystal display device

The present invention relates to a backlight assembly and a display device having the same, and more particularly, to a backlight assembly capable of improving display characteristics and a display device having the same.

In general, the liquid crystal display includes a liquid crystal display panel for displaying an image and a backlight assembly for providing uniform light to the liquid crystal display panel.

The backlight assembly is classified into an edge type backlight assembly and a direct type backlight assembly according to the position of the light source. The direct type backlight assembly includes a plurality of lamps under the liquid crystal display panel, and the lamps irradiate light onto the front surface of the liquid crystal display panel.

Since the lamps are located at a predetermined distance apart, the area between and between the lamps is relatively lower in brightness than the area corresponding to the lamps. Accordingly, the backlight assembly cannot provide uniform light to the liquid crystal display panel because the region between the lamps and the corresponding region is apparently perceived as a dark portion, thereby degrading display characteristics of the liquid crystal display device.

It is an object of the present invention to provide a backlight assembly capable of providing uniform light.

Another object of the present invention is to provide a display device having the above-described backlight assembly.

A backlight assembly according to one feature for realizing the object of the present invention described above consists of lamps and a container.

Lamps generate light. The storage container houses the lamps, and has a convex portion protruding to have a curved surface to reflect light from the lamps on one surface. At this time, the convex portion is located between two lamps adjacent to each other.

In addition, the display device according to one feature for realizing the above object of the present invention comprises a display panel and a backlight assembly.

The display panel displays an image using light. The backlight assembly includes lamps and a container. The lamps generate light and provide the light to the display panel. The storage container has a bottom surface provided under the lamps, and a convex portion protruding from the bottom surface to reflect the light from the lamps. At this time, the convex portion is located between two lamps adjacent to each other.

According to the backlight assembly and the display device having the same, the convex portion diffuses and reflects the light emitted from the lamp to prevent the area corresponding to the lamps from being recognized as the dark portion, and thus emits light having uniform luminance. Can be.

Hereinafter, with reference to the accompanying drawings, it will be described in detail the present invention.

1 is an exploded perspective view showing a backlight assembly according to an embodiment of the present invention, Figure 2 is a perspective view showing the storage container shown in FIG.

Referring to FIG. 1, the backlight assembly 100 accommodates a plurality of lamps 110 generating light, a diffuser plate 120 provided on the lamps 110, and the lamps 110. First and second side mold (130, 140), and the storage container 150 for receiving the first and second side mold (130, 140).

The lamps 110 are spaced apart at predetermined intervals and receive the power from the outside to generate the light. In the present exemplary embodiment, the lamps 110 may include first to twelfth lamps, but the number of the lamps may be increased or decreased according to the size of the backlight assembly 100.

The diffusion plate 120 is provided above the lamps 110 and diffuses and emits light from the lamps 110.

Although not shown in the drawing, the backlight assembly 100 is provided above the diffuser plate 120 to improve the characteristics of the light passing through the diffuser plate 120, for example, an increase in luminance and an uniformity of the luminance. The sheets may further be provided. To this end, the optical sheets may include various optical sheets, for example, a prism sheet for collecting light from the diffusion plate 120.

The first and second side molds 130 and 140 are positioned at both ends of the lamps 110, respectively. The first and second side molds 130 and 140 accommodate both ends of the lamps 110. In this case, the first and second side molds 130 and 140 are positioned at both sides of the light emitting area where the light of the lamps 110 is generated.

Although not shown in the drawings, lamp fixing parts fixing the positions of the lamps 110 are positioned at both ends of the lamps 110, respectively. The lamp fixing parts may be inserted at both ends of the lamps 110 in the form of clip coupling to fix the positions of the lamps 110. In this case, the lamp fixing parts are accommodated in the first and second side molds 130 and 140.

End portions corresponding to both ends of the lamps 120 may be seated on the first and second side molds 130 and 140. Although not shown, the first and second side molds 130 and 140 may have stepped portions supporting end portions of the diffusion plate 120.

The storage container 150 accommodates the first and second side molds 130 and 140 in which the lamps 110 and the diffusion plate 120 are accommodated.

The storage container 150 has a bottom surface 151 provided below the lamps 110, a side wall 152 extending from an edge of the bottom surface 151, and a plurality of protrusions protruding from the bottom surface 151. It includes the convex portion 153 of the.

Since the bottom surface 151 is made of a synthetic resin of white color, the bottom surface 151 has a function of reflecting light leaked from the lamps 110. Accordingly, the backlight assembly 100 does not need to further include a reflector reflecting the light under the lamps 110, thereby reducing manufacturing costs.

As shown in FIG. 2, the convex portions 153 extend in the longitudinal direction of the lamps 110 and have the curved surface. In this embodiment, the convex portions 153 may be formed of first to twelfth convex portions, but the number of the convex portions may be increased or decreased according to the number of the lamps.

The convex portions 153 may have a semicircular shape when viewed in the longitudinal direction of the lamps 110. That is, when the convex portions 153 are formed to have corners like a prism shape when viewed in the longitudinal direction of the lamps 110, dark lines are generated at the corners. Therefore, the convex portions 153 may be formed in a shape having a gentle curve so as to prevent such dark lines and diffuse the light to provide the diffuser plate 120 with light having a uniform brightness.

Referring to FIG. 1 again, the convex portions 153 are disposed in the same direction as the direction in which the lamps 110 are arranged, and are spaced apart from each other at predetermined intervals. Each convex portion is located corresponding to the light emitting area between two lamps adjacent to each other. Here, one convex portion is positioned between two lamps adjacent to each other. Accordingly, when viewed from the top of the lamps 110, the lamps 110 and the convex portions 153 are alternately positioned one by one.

The convex portions 153 reflect the light emitted between the lamps 110 to prevent the dark portion from occurring between the lamps 110. That is, since the area between the lamps 110 is lower in brightness than the area where the lamps 110 are located, it may be recognized as a dark part. The convex portions 153 diffuse and reflect the light emitted between the lamps 110 to improve the use efficiency of the light emitted between the lamps 110.

Therefore, the convex portions 153 may improve the luminance between the lamps 110, thereby reducing the luminance difference between the area where the lamps 110 are located and the area where the lamps 110 are spaced apart from each other. Can be.

As such, the convex portions 153 diffuse and reflect the light between the lamps 110 and provide the light to the diffuser plate 120, and thus, between the diffuser plate 120 and the lamps 110. The separation distance can be reduced.

That is, the luminance of the region corresponding to the lamps 110 is significantly higher than the luminance of the region corresponding to the lamps 110. Therefore, a suitable amount of light can be diffused between the lamps 110 and the diffuser plate 120 so that the light emitted from the lamps 110 is uniformly provided to the diffuser plate 120. Space is needed. Accordingly, the diffusion plate 120 is spaced apart from the lamps 110 by a proper distance to secure a space in which the light from the lamps 110 can be diffused.

If the separation distance between the lamps 110 and the diffusion plate 120 is too close, an appropriate space for diffusing the light cannot be secured, so that the light from the lamps 110 It may not be uniformly provided to the diffusion plate 120. In particular, as the luminance difference between the region corresponding to the lamps 110 and the region between the lamps 110 and the corresponding region increases, the separation distance between the diffuser plate 120 and the lamps 110 increases. In addition, as the separation distance between the lamps 110 and the diffusion plate 120 increases, the overall brightness of the backlight assembly 100 may decrease.

Since the convex portions 153 primarily diffuse light emitted between the lamps 110 and provide the diffused light to the diffusion plate 120, the lamps 110 are located. The luminance difference between an area and an area between the lamps 110 may be reduced. Therefore, since the backlight assembly 100 may reduce the distance between the lamps 110 and the diffuser plate 120, the backlight assembly 100 may reduce the thickness of the backlight assembly 100 and the backlight assembly 100. Can improve the overall brightness.

In addition, since the thickness of the area where the convex portions 153 is provided is thicker than the thickness of the area where the convex portions 153 are not provided, the bottom surface 151 has an improved strength. do. In addition, the convex portions 153 have a shock absorbing effect. Accordingly, the storage container 150 can prevent the bottom surface 151 from being bent, even if an impact is applied from the outside.

The storage container 150 further includes first to third support parts 154a, 154b, and 154c for supporting the diffusion plate 120.

In this embodiment, the container 150 has three supports 154a, 154b, and 154c, but the number of the supports 154a, 154b, and 154c increases with the size of the backlight assembly 100. Can be reduced.

The first to third supporting parts 154a, 154b, and 154c protrude from the convex parts 153, and support the diffusion plate 120 to separate the distance between the diffusion plate 120 and the lamps 110. Keep it uniform.

The first and second side molds 130 and 140 support two edge regions of the diffusion plate 120 that face each other. Accordingly, the central portion of the diffuser plate 120 is bent toward the lamps 110 such that the distance between the lamps 110 and the diffuser plate 120 is not uniform.

The first to third supporting parts 154a, 154b, and 154c partially support the remaining areas except the edge area of the diffusion plate 120 to prevent the central portion of the diffusion plate 120 from bending.

The first to third supports 154a, 154b, and 154c are arranged in a zigzag form and are formed on only a few of the convex portions 153.

3 is a cross-sectional view taken along the line II ′ of FIG. 1. In this embodiment, the arrangement relationship between the convex portions 153 and the lamps 110 may include the first to third lamps 111, 112, and 113 and the second and third convex portions 153a and 153b. ) As an example.

Referring to FIG. 3, the first to third lamps 111, 112, and 113 are sequentially disposed on the bottom surface 151 of the storage container 150. The second and third convex portions 153a and 153b protruding from the bottom surface 151 are located correspondingly between the first to third lamps 111, 112 and 113.

In detail, the second convex portion 153a is positioned between the first lamp 111 and the second lamp 112, and the third convex portion 153b is positioned on the second lamp 112. And corresponding to the third lamp 113.

The second convex portion 153a diffuses and reflects the light L1 emitted from the first and second lamps 111 and 112 between the first and second lamps 111 and 112. . The third convex portion 153b diffuses and reflects the light emitted from the second and third lamps 112 and 113 to the second lamp 112 and the third lamp 113.

As such, the second and third convex portions 153a and 153b may be disposed between the first to third lamps 111, 112 and 113. The light incident from the light is diffused and emitted. Accordingly, the luminance difference between the region corresponding to the first to third lamps 111, 112, and 113 and the region corresponding to the first to third lamps 111, 112, and 113 may be reduced. As such, the backlight assembly 100 may emit uniform light.

In addition, since the second and third convex portions 153a and 153b diffuse and reflect light emitted between the first to third lamps 111, 112 and 113, the first to third lamps ( The distance D between the 111, 112, and 113 and the diffusion plate 120 may be reduced. Accordingly, the backlight assembly 100 can improve the overall brightness and reduce the overall thickness.

Meanwhile, the first support part 154a is partially provided on the upper surface of the third convex part 153b. The first support part 154a protrudes from the third convex part 153b to support the diffusion plate 120 provided on the first to third lamps 111, 112, and 113.

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

Referring to FIG. 4, the liquid crystal display device 400 may include a display panel assembly 200 displaying an image using light, a backlight assembly 100 providing the light to the display panel assembly 200, and the display. The top chassis 300 guides the position of the panel assembly 200.

The display panel assembly 200 receives an image signal and displays a liquid crystal display panel 210 and a data side and gate side printed circuit board 220 that provides the image signal to the liquid crystal display panel 210. 230, and data side and gate side tape carrier packages (TCP) 240 and 250 electrically connected to the liquid crystal display panel 210.

The liquid crystal display panel 210 includes a thin film transistor substrate (TFT) 211, a color filter substrate 212 coupled to the TFT substrate 211 so as to face each other, and the TFT substrate 211 and the TFT. It includes a liquid crystal layer 213 injected between the color filter substrate 212.

The TFT substrate 211 includes a plurality of pixels (not shown) in a matrix form. Each pixel is defined by a gate line (not shown) extending in a first direction, a data line (not shown) extending in a second direction orthogonal to the first direction and insulated from and intersecting the gate line. A pixel electrode is provided. In addition, a TFT is formed in each pixel to be connected to the gate line, the data line, and the pixel electrode.

In the color filter substrate 212, an RGB color pixel (not shown) expressing a predetermined color using the light is formed by a thin film process, and a common electrode facing the pixel electrode is formed.

The liquid crystal layer 213 is interposed between the TFT substrate 211 and the color filter substrate 212. The liquid crystal layer 213 is arranged in a specific direction by an electric field formed between the pixel electrode and the common electrode to adjust the transmittance of light provided from the backlight assembly 100.

The data side printed circuit board 220 is provided on a source side of the liquid crystal display panel 210. The data side printed circuit board 220 includes a driving chip for generating the driving signal for driving the liquid crystal display panel 210, a timing controller for adjusting the timing of the driving signal, and a data signal for storing the data signal. Memory and the like are mounted.

The gate side printed circuit board 230 is provided on the gate side of the liquid crystal display panel 210. The gate side printed circuit board 230 includes the driving chip, the timing controller, and a memory for storing the gate signal.

In this embodiment, the display panel assembly 200 has two printed circuit boards 220 and 230, but one printing in which the functions of the data side and the sheet side printed circuit boards 220 and 230 are integrated. It may be provided with a circuit board.

One end of the data side printed circuit board 220 is provided with the data side TCPs 240. The data side TCPs 240 are electrically connected to the liquid crystal display panel 210 and the data side printed circuit board 220 to receive the driving signal and the data signal applied from the printed circuit board 220. The liquid crystal display panel 210 is provided.

The gate-side TCPs 250 are attached to one end of the gate-side printed circuit board 230. The gate side TCPs 240 are electrically connected to the liquid crystal display panel 210 and the gate side printed circuit board 230 so that the gate signal and the driving signal are applied from the gate side printed circuit board 230. Is provided to the liquid crystal display panel 210.

The backlight assembly 100 provided below the display panel assembly 200 provides uniform light to the liquid crystal display panel 210. Since the backlight assembly 100 has the same configuration as that of the backlight assembly illustrated in FIG. 1, reference numerals will be given together, and redundant description thereof will be omitted.

The backlight assembly 100 accommodates a plurality of lamps 110 generating light, a diffuser plate 120 provided on the lamps 110, and the lamps 110. And first and second side molds 130 and 140, and a storage container 150 accommodating the first and second side molds 130 and 140.

The storage container 150 has a bottom surface 151 provided below the lamps 110, a side wall 152 extending from an edge of the bottom surface 151, and a plurality of protrusions protruding from the bottom surface 151. It includes the convex portion 153 of the. The convex parts 153 diffuse and reflect light emitted between the lamps 110. Accordingly, since the convex parts 153 may improve the brightness between the lamps 110, the difference in brightness between the area where the lamps 110 are located and the area where the lamps 110 are spaced apart from each other is increased. Can be reduced.

As such, since the convex parts 153 diffuse and reflect the light between the lamps 110, the distance between the diffuser plate 120 and the lamps 110 may be reduced. Accordingly, the liquid crystal display device 400 may reduce the overall thickness.

Although not shown in the figure, the liquid crystal display device 400 may further include a mold frame for accommodating the liquid crystal display panel 210. The mold frame is provided on the backlight assembly 100, and has a bottom surface opened so that light from the backlight assembly 100 is provided to the liquid crystal display panel 210.

The top chassis 300 is provided on the liquid crystal display panel 210. The top chassis 300 guides the position of the liquid crystal display panel 210 and is fixed to the liquid crystal display panel 210 by combining with the storage container 150 provided in the backlight assembly 100.

According to the present invention described above, the liquid crystal display device includes a storage container having convex portions for diffusing and reflecting light emitted from the lamps to a region formed between the lamp and the lamp. The convex portions diffuse and reflect light from the lamps to provide to the diffuser plate, thereby reducing the luminance difference between the lamp and the corresponding area and between the lamps and the corresponding area. Accordingly, the backlight assembly can prevent the dark portion from occurring between the lamps and the corresponding area, thereby providing light having a uniform brightness to the liquid crystal display panel, and the liquid crystal display device can improve display characteristics. have.

Further, since the convex portions first diffuse the light emitted from the lamps between the lamps and then provide the diffuser plate, the luminance difference between the lamp and the corresponding area and the lamp and the corresponding area can be reduced. Accordingly, the backlight assembly can reduce the distance between the lamps and the diffuser plate, thereby reducing the overall thickness.

In addition, when the distance between the lamps and the diffusion plate is reduced, the brightness of the backlight assembly is increased, thereby improving display characteristics of the liquid crystal display device.

Although described above with reference to the embodiments, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below. I can understand.

Claims (7)

Lamps for generating light; And And a receiving container accommodating the lamps, and having a convex portion protruding to have a curved surface to reflect light from the lamps on one surface thereof. The backlight assembly of claim 1, wherein the convex portion is positioned between the lamps. The backlight assembly of claim 1, wherein the convex portion extends in the longitudinal direction of the lamps. The backlight assembly of claim 1, further comprising a diffusion member disposed on the lamps to diffuse and emit the light. The method of claim 4, wherein the storage container, And a support portion protruding from the convex portion to support the diffusion member to maintain a uniform distance between the lamps and the diffusion member. The backlight assembly of claim 5, wherein the support part is integrally formed with the convex part. A display panel displaying an image using light; And And a backlight assembly having lamps for generating the light and providing the light to the display panel, and a receiving container accommodating the lamps and having a convex portion protruding to have a curved surface to reflect light from the lamps. Characterized by a backlight assembly.

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