KR20080041017A - Storage member and liquid crystal display device having same - Google Patents

Abstract

The present invention provides an accommodating member for accommodating a backlight assembly, the base including a base, a sidewall portion bent upward from the edges of the three sides of the base, and a protrusion bent downward from the edges of the remaining one side of the base.

As described above, the present invention reinforces the strength of the storage member without a separate member, and prevents the backlight assembly from bending when the FPCB mounting operation is performed, thereby preventing damage to the liquid crystal display device. .

Description

A storage member and a liquid crystal display having the same {CHASSIS AND LIQUID CRYSTAL DISPLAY DEVICE HAVING THE SAME}

1 is an exploded perspective view illustrating a liquid crystal display device having a lower chassis according to the present invention.

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

3 is a perspective view of a lower chassis according to the present invention.

Figure 4 is a rear perspective view of the lower chassis according to the present invention from the rear.

5 is a rear perspective view showing a modification of the lower chassis according to the present invention.

 <Description of the code | symbol about the principal part of drawings>

100: liquid crystal display panel 220: flexible printed circuit board

300: light source unit 400: light guide plate

500: reflector 600: optical sheet

700: mold frame 710: storage space

800: lower chassis 810: protrusion

The present invention relates to a liquid crystal display device, and more particularly, to an accommodating member for preventing damage to the liquid crystal display device and a liquid crystal display device having the same.

In general, a flat panel display (FPD) is a display device essential for realizing a compact and lightweight system such as a monitor of a desktop computer, a portable computer such as a notebook computer, a PDA, or a mobile phone terminal. The device includes a liquid crystal display (LCD), a plasma display panel (PDP), a field emission display (FED), and the like.

In particular, LCD has been attracting attention as an alternative means of overcoming the shortcomings of conventional cathode ray tube (CRT) due to the advantages of miniaturization, light weight and low power consumption, and now requires a flat panel display device. It is applied to various small and medium sized products.

The LCD includes a liquid crystal display panel, a flexible printed circuit board (FPCB) provided at one side of the liquid crystal display panel to drive the liquid crystal display panel from an external signal, and provides light to the liquid crystal display panel. The backlight assembly includes a mold frame and a lower chassis for accommodating the backlight assembly.

One end of the FPCB is coupled to one side of the liquid crystal display panel, and the other end is bent to be located at the rear of the lower chassis. At this time, the other end of the FPCB is located on the rear surface of the lower chassis by a fixing member such as a double-sided tape.

The lower chassis is angled at three edges, and one side is partially removed to accommodate the FPCB mounted with a plurality of electronic components in a mold frame, thereby making it impossible to angle.

In addition, the FPCB in which a plurality of electronic components are mounted is located in the part where the lower chassis is removed, and the backlight assembly when bending and bonding the FPCB because the liquid crystal display panel at the upper part of the lower chassis in this area is also composed of one sheet. Is bent, which causes damage to the liquid crystal display.

In addition, since the thickness of the panel and the thickness of the lower chassis are becoming thinner in recent years, the strength supplementation for the portion is increasingly required.

In order to solve the above problems, an object of the present invention is to provide an accommodating member and a liquid crystal display device having the same for preventing damage to the liquid crystal display device by the rear mounting of the FPCB.

In order to achieve the above object, the housing member for accommodating the backlight assembly of the present invention includes a base, a side wall portion bent upward from the edges of the three sides of the base, and a protrusion bent downward from the edges of the remaining one side of the base. Include.

The base is characterized in that a portion of one side is cut.

The protrusion may include a sidewall portion bent to the bottom of the base and a flat portion bent vertically from the sidewall portion.

In addition, the liquid crystal display device of the present invention for achieving the above object is a liquid crystal display panel for displaying an image, a backlight assembly for providing light to the liquid crystal display panel, and a lower chassis for fixing the liquid crystal display panel and the backlight assembly And, one side is in contact with the liquid crystal display panel, the other side is bent to the back of the backlight assembly, one side includes a flexible printed circuit board mounted with a plurality of electronic components, the bottom of the lower chassis is bent from the back Characterized in that the formed protrusions.

And a mold frame for accommodating the backlight assembly, and an accommodation space for accommodating the electronic component is formed under the mold frame.

The lower chassis includes a base and a sidewall portion bent upward from the edges of the three sides of the base, wherein the protrusion is bent downward from the edges of the other one side of the base.

The base is characterized in that a portion of one side is cut.

The protrusion may include a sidewall portion bent to the bottom of the base and a flat portion bent vertically from the sidewall portion.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you. Like reference numerals in the drawings refer to like elements.

1 is an exploded perspective view showing a liquid crystal display device having a lower chassis according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a perspective view of a lower chassis according to the present invention, and FIG. FIG. 5 is a rear perspective view of the lower chassis according to the present invention, and FIG. 5 is a rear perspective view illustrating a modification of the lower chassis of the present invention.

1 and 2, a liquid crystal display according to the present invention includes a display assembly 1000, a backlight assembly 2000 that provides light to the display assembly 1000, the display assembly 1000, and a backlight. And an accommodating member 3000 for accommodating and fixing the assembly 2000.

The display assembly 1000 includes a liquid crystal display panel 100, an integrated circuit chip IC 210 mounted on one side of the liquid crystal display panel 100, and a liquid crystal display panel 100. The connected flexible printed circuit board (FPCB) 220 is included.

The liquid crystal display panel 100 includes a color filter (CF) substrate 110 and a thin firt transistor (TFT) substrate 120 disposed under the CF substrate 110.

The CF substrate 110 is coated with a common electrode made of a color filter on one surface and a transparent conductor such as indium tin oxide (ITO) or indium zinc oxide (IZO) on the color filter. have.

In the TFT substrate 120, a TFT having a matrix form is formed, and the source and gate terminals of the TFTs are respectively connected to a data line and a gate line, and a pixel electrode is connected to the drain terminal.

The IC 210 is mounted on one side of the TFT substrate 120 to provide a data signal, a gate driving signal, which are signals for driving the liquid crystal display panel 100, and a plurality of timing signals for applying these signals at an appropriate time. And a gate driving signal and a data driving signal are applied to the gate line and the data line of the liquid crystal display panel 100, respectively.

One end of the FPCB 220 is connected to one side of the TFT substrate 120, and converts an external signal of an analog type, which is input through the pad unit 250 formed at the other end of the FPCB 220, into a digital signal, thereby converting the IC ( 210 serves to supply. In this case, as illustrated in FIG. 2, the FPCB 220 includes a plurality of electronic components 240 mounted on one surface of the FPCB 220, and the electronic components 240 are formed on the mold frame 700. It is stored in the storage space 710.

In addition, one side of the TFT substrate 120 may apply a protective film 230 on the TFT substrate 120 to protect the IC 210 and the FPCB 220 mounted on the TFT substrate 120. . That is, the passivation layer 230 is formed to cover the IC 210 and the FPCB 220.

The backlight assembly 2000 may include a light source unit 300, a light guide plate 400 coupled to the light source unit 300, a reflector plate 500 provided below the light guide plate 400, and an upper portion of the light guide plate 400. Optical sheet 600.

The light source unit 300 is installed on the side of the light guide plate 400, and the light source unit 300 includes an LED device 310 and a substrate 320 on which the LED device 310 is mounted. The LED device 310 is a side view type device, and the LED device 310 emits light toward the side of the light guide plate 400. In addition, the substrate 320 is a flexible printed circuit board having excellent bending, and a circuit (not shown) is formed therein to supply external power to the LED device 310 through the circuit.

In the drawing, the light source unit 300 is installed on one side of the liquid crystal display panel 100 opposite to the light guide plate 400 positioned under the driving units 210 and 220, but is located below the driving units 210 and 220. Of course, it can be stored in the frame 700.

The light guide plate 400 is coupled to one side of the light source unit 300 and is formed as a rectangular or square plate. The light guide plate 400 serves to change light having an optical distribution in the form of a point light source or a linear light source into light having an optical distribution in the form of a surface light source.

The reflector 500 is provided under the light guide plate 400, and reflects some light emitted from the lower part of the light guide plate 400 to the light exit surface of the backlight assembly 2000 to increase the light efficiency and to reduce the reflection of the entire incident light. Adjust the light emitting surface to have a uniform luminance distribution.

The optical sheet 600 includes a diffuser plate 610 and at least one prism sheet 620 and is disposed above the light guide plate 400 to uniformize the luminance distribution of light emitted from the light guide plate 400. do.

The accommodation member 3000 serves to accommodate the display assembly 1000 and the backlight assembly 2000, and includes a mold frame 700 and a lower chassis 800.

The mold frame 700 is formed in a rectangular frame shape and serves to sequentially receive the backlight assembly 2000 and the display assembly 1000. That is, components of the backlight assembly 2000 are sequentially received inside the mold frame 700, and the liquid crystal display panel 100 is seated on the mold frame 700. In this case, a bar-shaped storage space 710 is formed at a lower side of the mold frame 700 in a vertical direction of the mold frame 700, and the liquid crystal display panel 1000 is formed in the storage space 710. As the FPCB 220 is bent, the electronic component 240 formed on one surface of the FPCB 220 is received.

The lower chassis 800 accommodates and supports a plurality of sheets and the liquid crystal display panel 100 accommodated in the mold frame 700 and is combined with an upper chassis (not shown) to form the display assembly 1000 and the backlight assembly 2000. It serves to fix the.

That is, as shown in FIG. 3, the lower chassis 800 includes a base 820 partially cut and sidewall portions 830 to 850 bent upward from edges of three sides of the base 820. Specifically, a portion of one side where sidewalls 830 to 850 are not formed is cut at the edge of base 820.

In addition, as shown in FIG. 4, the bottom of the lower chassis 800 has an edge of the base 820 positioned in the cut-out area with a hemming treatment on the back of the base 820 ( 810 is formed. That is, the protrusion 810 includes a sidewall 812 protruding outwardly from the edge rear surface of the base 820 and a flat portion 814 vertically bent from the sidewall 812.

Therefore, when the FPCB 220 is bent to the rear surface of the lower chassis 800, the electronic components 240 formed on one surface of the FPCB 220 are accommodated in the storage space 710 of the mold frame 700. The FPCB 220 is bonded to the back of the base 820 by an adhesive means 900 such as a double-sided tape through the protrusion 810 formed on the bottom of the lower chassis 800, and formed on the lower chassis 800. The protrusion 810 increases the strength in the B direction to prevent bending of the backlight assembly 2000 when bonding the FPCB 220 to the rear surface of the lower chassis 800, thereby preventing damage to the liquid crystal display. can do. At this time, the side wall 812 of the protrusion 810 is preferably formed almost the same as the thickness of the adhesive means 900, such as double-sided tape. In this case, the lower chassis 800 may prevent the problem that the lower chassis 800 may be bent along the long side of the base 820 by the protrusion 810.

The lower chassis 800 may be configured as shown in FIG. 5. That is, referring to FIG. 5, the lower chassis 800 includes a base 820 and sidewall portions 832, 842, and 850 vertically bent at edges of three sides of the base 820. At the edge of the base 820 where the parts 832, 842, and 850 are not formed, a protrusion 810 extending from the rear surface of the base 820 is formed. The protrusion 810 includes a sidewall 812 protruding from the rear of an edge of the base 820, and a flat portion 814 vertically bent from the sidewall 812.

In this case, the lengths of the sidewall portions 832 and 842 facing each other may be shorter than the lengths of the sidewall portions 830 and 840 illustrated in FIG. 4, so as to cover only a portion of the sidewalls of the mold frame 700. have. That is, by shortening the lengths of the sidewall portions 832 and 842, when the FPCB 220 is bent to the rear surface of the lower chassis 800, the FPCB 220 is completely in contact with the electronic component 240 formed in the FPCB 220. Therefore, the electronic component 240 may be stably stored in the storage space 710 of the mold frame 700. In addition, when the FPCB 220 is bonded to the rear surface of the lower chassis 800, the bending of the backlight assembly 2000 may be prevented by the protrusion 810 formed on the lower chassis 800, whereby the liquid crystal is prevented. Damage to the display device can be prevented.

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

As described above, the housing member and the liquid crystal display device having the same of the present invention reinforce the strength of the housing member without a separate member, and can prevent the backlight assembly from bending when the FPCB mounting or the like proceeds. There is an effect that can prevent damage to the liquid crystal display device.

Claims (8)

An accommodation member for housing the backlight assembly, Bass, A side wall portion bent upward from an edge of three sides of the base; A protrusion bent downward from the edge of the remaining one side of the base Storage member comprising a. The housing member according to claim 1, wherein a portion of one side of the base is cut out. The receiving member of claim 2, wherein the protrusion includes a sidewall portion bent downwardly from the base and a flat portion bent vertically from the sidewall portion. A liquid crystal display panel for displaying an image, a backlight assembly for providing light to the liquid crystal display panel, a lower chassis for fixing the liquid crystal display panel and the backlight assembly, one side of the liquid crystal display panel and the other side of the backlight assembly Bend to the back side of, and one side includes a flexible printed circuit board mounted with a plurality of electronic components, And a protrusion bent from the rear surface of the lower chassis. The liquid crystal display of claim 4, further comprising a mold frame for accommodating the backlight assembly, and an accommodating space for accommodating the electronic component is formed under the mold frame. The liquid crystal display of claim 5, wherein the lower chassis includes a base and a sidewall portion bent upward from three edges of the base, and the protrusion is bent downward from an edge of the other side of the base. . The liquid crystal display of claim 6, wherein a portion of one side of the base is cut out. The liquid crystal display of claim 7, wherein the protrusion includes a sidewall portion bent downwardly from the base and a flat portion bent vertically from the sidewall portion.

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