KR20060010224A - Back-light assembly and display having the same - Google Patents

Abstract

Disclosed are a backlight assembly having an improved display quality of an image and a reduced volume, and a display device having the same. The backlight assembly includes a container and a light supply device. The storage container includes a bottom surface with an opening formed therein, and the light supply device includes a driving substrate disposed at a position corresponding to the opening among the outer surfaces of the bottom surface, and a light source mounted on the driving substrate and disposed inside the storage container through the opening. do. By changing the shape of the storage container and installing a light source in the storage container, the volume of the backlight assembly can be further reduced, and the display quality of the image generated from the display device can be further improved.

Description

BACK-LIGHT ASSEMBLY AND DISPLAY HAVING THE SAME}

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

FIG. 2 is a cross-sectional view taken along line I1-I2 of FIG. 1.

3 is a cross-sectional view illustrating a backlight assembly according to a second embodiment of the present invention.

4 is a cross-sectional view illustrating a backlight assembly according to a third embodiment of the present invention.

5 is a cross-sectional view illustrating a backlight assembly according to a fourth embodiment of the present invention.

6 is an exploded perspective view illustrating a backlight assembly according to a fifth embodiment of the present invention.

7 is a conceptual diagram illustrating a display device according to a sixth embodiment of the present invention.

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

100: backlight assembly 200: storage container

300: light supply device 310: driving substrate                 

320: light source 400: fixed cover

450: reflector 470: light mixing member

490: optical member

The present invention relates to a backlight assembly and a display device having the same. More particularly, the present invention relates to a backlight assembly having an improved display quality and a reduced volume of an image, and a display device having the same.

Recently, an information processing device has various forms and various functions, and processes information at a higher speed. The information processed in the information processing apparatus has an electrical signal format. Therefore, in order for the user to visually check the information processed by the information processing apparatus, display apparatuses displaying the information as an image are required.

One of the display devices, a liquid crystal display, displays an image using liquid crystal. The liquid crystal display has advantages of thinner, lighter weight, lower power consumption, and lower driving voltage than other display devices.

Since the liquid crystal of the liquid crystal display device having such an advantage is a non-light emitting device that does not emit light by itself, in order to display an image from the liquid crystal display device, a backlight assembly including light is required.                         

Conventional backlight assemblies include light sources such as a light emitting diode (LED), a cold cathode fluorescent lamp (CCFL), a flat fluorescent lamp (FFL), and the like, to generate light. Among these light sources, cold cathode ray tube lamps and flat panel fluorescent lamps are mainly employed in large display devices, and light emitting diodes are employed in small display devices.

Among these, the light emitting diode includes a red light emitting diode for generating red light, a green light emitting diode for generating green light, and a blue light emitting diode for generating blue light.

The light emitting diode used in the liquid crystal display device is disposed inside the backlight assembly of the liquid crystal display device, whereby the liquid crystal is liquefied by heat generated from the light emitting diode itself, and as a result, the image quality of the display device is greatly degraded.

In addition, the red light emitting diodes, the green light emitting diodes, and the blue light emitting diodes generate white light by mixing the red light, the green light, and the blue light generated from the respective light sources. In addition, the volume of the display device increases due to space.

Therefore, the present invention has been made in view of such a conventional problem, and the first object of the present invention is to improve the display quality of the image by reducing the shape of the storage container and changing the coupling structure of the light emitting diode and the storage container, and the volume is reduced. To provide a backlight assembly.                         

A second object of the present invention is to provide a display device having the backlight assembly.

The backlight assembly for achieving the first object of the present invention includes a storage container and a light supply device. The storage container includes a bottom surface having an opening. The light supply device includes a driving substrate disposed in a position corresponding to the opening of the outer surface of the bottom surface and a light source disposed inside the receiving container through the opening.

In addition, another backlight assembly for achieving the first object of the present invention includes a container, a light supply device and a light mixing member. The storage container includes a bottom surface on which grooves are formed. The light supply device includes a driving substrate disposed in the accommodation groove and a light source mounted on the driving substrate. The light mixing member is disposed spaced apart from the light source by a predetermined distance, and mixes the light generated from the light source.

In addition, the display device for achieving the second object of the present invention includes a backlight assembly and a display panel. The backlight assembly includes a storage container including a bottom surface having an opening formed therein, and a driving substrate disposed at a position corresponding to the opening among the outer surfaces of the bottom surface, and a light source mounted on the driving substrate and disposed in the interior of the storage container through the opening. A feeder. The display panel is disposed in the storage container to change the light generated from the light source into image light including information.

According to the present invention, the heat generated from the light emitting diode mounted on the backlight assembly to generate light necessary for displaying an image is quickly dissipated to the outside, and the volume of space required for mixing the light generated from the light emitting diode is reduced so that the display device can be removed from the display device. Improve the display quality of the generated image.

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

Backlight assembly

Example  One

1 is an exploded perspective view illustrating a backlight assembly according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line I1-I2 of FIG. 1.

1 and 2, the backlight assembly 100 includes a storage container 200 and a light supply device 300.

The storage container 200 includes a bottom surface 210 and sidewalls 220 extending or disposed from an edge of the bottom surface 210. The bottom surface 210 is formed with an opening 212 arranged in the form of a matrix.

The light supply device 300 includes a driving substrate 310 and a light source 320. The light source 320 is disposed at a position corresponding to each opening 212 of the storage container 200.

For example, the light source 320 is a light emitting diode. For example, the light source 320 according to the present exemplary embodiment includes a red light emitting diode R generating red light, a green light emitting diode G generating green light, and a blue light emitting diode B generating blue light.                     

The red light emitting diode (R), the green light emitting diode (G), and the blue light emitting diode (B) are alternately arranged in a matrix form inside the storage container 200 through the opening 212. Alternatively, the light source 320 of the backlight assembly 100 according to the present embodiment may include a white light emitting diode to generate white light.

The light source 320 is disposed on the driving substrate 310, and the light source 320 is turned on by the driving power applied to the driving substrate 310.

Meanwhile, the backlight assembly 100 according to the present embodiment may further include a fixing cover 400 and a reflecting plate 450 for supporting and fixing the light supply device 300.

The fixing cover 400 fixes the driving substrate 310 on which the light source 320 is mounted to the outer surface of the bottom surface 210 of the storage container 200. In the fixing cover 400 according to the present embodiment, the coupling hole 410 is formed at the edge of the fixing cover 400, and the bottom surface 210 of the storage container 200 corresponds to the position of the coupling hole 410. Coupling hole 214 is formed. Therefore, the fixing cover 400 is fixed to the bottom surface 210 of the storage container 200 by the fastening screw 412.

The fixing cover 400 of the present embodiment may further include an insulating member 420. The insulating member 420 is interposed between the fixed cover 400 and the driving substrate 310 to allow the driving substrate 310 to be insulated from the fixed cover 400.

The reflection plate 450 is disposed on the bottom surface 210 of the storage container 200 to reflect the light toward the bottom surface 210 of the light generated from the light source 320. The reflective plate 450 includes a reflective plate opening 452 formed at a position corresponding to the opening 212 formed in the bottom surface 210 of the storage container 200.

Example  2

3 is a cross-sectional view illustrating a backlight assembly according to a second embodiment of the present invention. Except for the lens of the light source, the backlight assembly according to the second embodiment of the present invention has the same configuration as the backlight assembly of the first embodiment described above, and thus the overlapping description thereof will be omitted. The code and name will be used.

Referring to FIG. 3, the light source 320 according to the present embodiment further includes a lens 322 for changing an optical distribution of light generated by the light source 320.

The lens 322 includes a transparent material through which light passes, and surrounds each light source 320. The lens 322 of the present exemplary embodiment has a concave surface of the upper portion of the lens 322, so that the light generated from the light source 320 is refracted by the lens to emit light in a direction inclined at an angle with respect to the vertical.

Example  3

4 is a cross-sectional view illustrating a backlight assembly according to a third embodiment of the present invention. The backlight assembly according to the third embodiment of the present invention has the same configuration as the backlight assembly of the first embodiment described above, except for the light mixing member and the sidewalls of the storage container, and thus a redundant description thereof will be omitted. The same reference numerals and names are used for the elements.

Referring to FIG. 4, the backlight assembly 100 according to the present exemplary embodiment includes a light mixing member 470 mixing light generated from a light source.

The light mixing member 470 is disposed at a spaced apart from the bottom surface 210 of the storage container 200 by a predetermined distance, and light generated by the light source 320 is mixed with, for example, red light, green light, and blue light. White light may be generated on the upper surface of the 470. The light mixing member 470 may reduce the volume of the backlight assembly 100 by greatly reducing the volume required to generate white light by mixing the light generated from the light source 320.

The side wall 220 of the storage container 200 of the present embodiment may further include a step 222 for fixing the light mixing member 470.

Example  4

5 is a cross-sectional view illustrating a backlight assembly according to a fourth embodiment of the present invention. Except for the optical member, the backlight assembly according to the fourth embodiment of the present invention has the same configuration as the backlight assembly of the third embodiment described above, and thus duplicated description thereof will be omitted, and like reference numerals refer to like elements. And names will be used.

Referring to FIG. 5, the backlight assembly 100 of the present exemplary embodiment further includes an optical member 490 for changing an optical characteristic of light passing through the light mixing member 470.

The optical member 490 includes a diffusion sheet 492 and at least one prism sheet 494. The diffusion sheet 492 is disposed on the upper surface of the light mixing member 470, and evenly diffuses the light emitted from the light mixing member 470 to the prism sheet 494. The prism sheet 494 is disposed on the upper surface of the diffusion sheet 492, and condenses the light emitted from the diffusion sheet 492 using reflection and refraction to improve the front viewing angle and brightness of the light.

Example  5

6 is an exploded perspective view illustrating a backlight assembly according to a fifth embodiment of the present invention.

Referring to FIG. 6, the backlight assembly 500 of the present embodiment includes a storage container 600, a light supply device 700, and a light mixing member 800.

The receptacle 600 includes a bottom surface 610 and a sidewall 620 extending or disposed from an edge of the bottom surface 610.

The bottom surface 610 of the storage container 600 is formed with a receiving groove 612 having a channel (channel) or groove (groove) shape. In the present exemplary embodiment, at least two rows of storage grooves 612 are arranged on the bottom surface 610 in a stripe shape, and openings 614 for heat dissipation are formed in the storage grooves 610. In addition, the sidewall 620 of the storage container 600 is further formed with a step 622 for supporting the light mixing member 800.

The light supply device 700 includes a driving substrate 710 disposed in the accommodation groove 612 of the storage container 600 and a light source 720 mounted on the driving substrate.

The driving substrate 710 of the present embodiment may be disposed in the accommodation groove 612 of the storage container 600 through the adhesive or the double-sided adhesive tape. The driving substrate 710 provides driving power to the light source 720.                     

At least one light source 720 is mounted on the driving substrate 710. The light source 720 includes a light emitting diode. For example, the light source 720 of the present embodiment includes a red light emitting diode R, a green light emitting diode G, and a blue light emitting diode B.

The red light emitting diodes R, the green light emitting diodes G, and the blue light emitting diodes B have a matrix shape and are alternately disposed on the driving substrate 710. Alternatively, the light source 720 of the backlight assembly 600 of the present embodiment may include a white light emitting diode for generating white light.

The light mixing member 800 is disposed at a position spaced apart from the bottom surface 610 of the storage container 600, and the light mixing member 800 is disposed at the step 622 formed in the storage container 600.

Light generated from the light source 720, for example, red light, green light, and blue light, passes through the light mixing member 800 and then is mixed on the upper surface of the light mixing member 800 to generate white light. The light mixing member 800 may reduce the volume of the backlight assembly 500 by reducing the space required for mixing light generated from the light source 720.

 The backlight assembly 500 of the present embodiment may further include a reflecting plate 850 and an optical member 870.

The reflector plate 850 is disposed on the bottom surface 610. The reflector 850 reflects the light toward the bottom 710 of the light generated by the light source 720.

The optical member 870 includes a diffusion sheet 872 and at least one prism sheet 874. The diffusion sheet 872 is disposed on the upper surface of the light mixing member 800, and evenly diffuses the light emitted from the light mixing member 800 to the prism sheet 874. The prism sheet 874 is disposed on the upper surface of the diffusion sheet 872, and condenses the light emitted from the diffusion sheet 872 using reflection and refraction to improve the front viewing angle and brightness of the light.

Display

Example  6

7 is a conceptual diagram illustrating a display device according to a sixth embodiment of the present invention. Since the display device according to the sixth embodiment of the present invention has the same configuration and function as the backlight assembly of the first to fifth embodiments described above, duplicate description thereof will be omitted, and like reference numerals refer to like elements. The code and name will be used.

Referring to FIG. 7, the display device 1000 according to the present exemplary embodiment includes a backlight assembly 100 and a display panel 900.

The display panel 900 includes a first substrate 910, a second substrate 920, and a liquid crystal layer 930.

The first substrate 910 includes a plurality of pixel electrodes, a thin film transistor (TFT) applying a driving voltage to the pixel electrode, and signal lines for operating the thin film transistor.

The pixel electrode may include transparent and conductive indium tin oxide (ITO), indium zinc oxide (IZO), and amorphous indium tin oxide (a-ITO).                     

The second substrate 920 is disposed to face the first substrate 910. The second substrate 920 is disposed on the front surface of the second substrate 920 and is disposed on a transparent and conductive common electrode and a color filter facing the pixel electrode, for example, a red color. Filter, green color filter, and blue color filter.

The liquid crystal layer 930 is interposed between the first substrate 910 and the second substrate 920 and rearranged by an electric field difference formed between the pixel electrode and the common electrode. The rearranged liquid crystal layer 920 adjusts the light transmittance of light generated from the light source 320 of the backlight assembly 100, and the light whose light transmittance is adjusted passes through the color filter to display an image.

In this way, the heat generated from the light emitting diode mounted on the backlight assembly to generate the light required to display the image is quickly radiated to the outside, and the volume of space required for mixing the light generated from the light emitting diode is reduced to reduce the volume of the image generated from the display device. Improve display quality.

In the detailed description of the present invention described above with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art having ordinary skill in the art will be described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

Claims (18)

A storage container including a bottom surface having an opening; And And a light supply device including a driving substrate disposed at a position corresponding to the opening of the outer side of the bottom surface, and a light source mounted to the driving substrate and disposed inside the storage container through the opening. Backlight assembly. The backlight assembly of claim 1, wherein the opening is disposed in a matrix form on the bottom surface. The backlight assembly of claim 1, wherein at least two light sources are disposed on the driving substrate. The backlight assembly of claim 1, wherein the light source is a light emitting diode. The backlight assembly of claim 4, wherein the light emitting diode comprises a light emitting diode selected from the group consisting of a red light emitting diode, a green light emitting diode, a blue light emitting diode, and a white light emitting diode. The backlight assembly of claim 1, wherein the storage container further comprises a fixing cover for supporting and fixing the driving substrate. The backlight assembly of claim 1, wherein the light source further comprises a lens for changing an optical distribution of light generated by the light source. The backlight assembly of claim 1, wherein the storage container further comprises a light mixing member disposed at a spaced distance from the bottom surface to mix light generated from the light source. 9. The backlight assembly of claim 8, wherein the housing further comprises an optical member for changing an optical characteristic of light passing through the light mixing member. 10. The backlight assembly of claim 9, wherein the optical member comprises a diffusion sheet and a prism sheet. A storage container including a bottom surface on which a groove-shaped storage groove is formed; A light supply device including a driving substrate disposed in the accommodation groove and a light source mounted on the driving substrate; And And a light mixing member disposed to be spaced apart from the light source at a predetermined interval and for mixing light generated from the light source. 12. The backlight assembly of claim 11, wherein the receiving groove has a stripe shape and at least two rows are disposed on the bottom surface. The backlight assembly of claim 11, wherein an opening for dissipating heat is formed in the accommodation groove. A storage container including a bottom surface having an opening, and a driving substrate disposed at a position corresponding to the opening among the outer surfaces of the bottom surface, and a light source mounted to the driving substrate and disposed inside the storage container through the opening. A backlight assembly comprising a light supply comprising; And And a display panel disposed in the storage container to change the light generated by the light source into image light including information. The display device of claim 14, wherein the opening is arranged in a matrix on the bottom surface. The display device of claim 14, wherein at least one light source is disposed on the driving substrate, and the light source is a light emitting diode. The display device according to claim 14, wherein an optical mixing member for mixing light generated by the light source is disposed between the bottom surface and the display panel. 18. The display device according to claim 17, wherein an optical member for changing an optical characteristic of the light is disposed between the light mixing member and the display panel.

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