KR20080067845A - Display device - Google Patents

Abstract

A display device is provided to prevent an ESD(Electrostatic Discharge) defect from being generated between an FPCB(Flexible Printed Circuit Board) and a bottom chassis by modifying the shape of a bonding member arranged between the FPCB and the bottom chassis. A display device comprises a display panel(100), a bottom chassis(800), an FPCB(220), and a bonding member(900). The bottom chassis receives the display panel. As part of the bottom chassis is sectioned, a section part(830) is formed. Also the bottom chassis has a sidewall part(820d) as an edge of the bottom chassis is perpendicularly bent. The FPCB, connected to a side of the display part, is bent toward the rear side of the bottom chassis. The bonding member is arranged between the FPCB and the bottom chassis. The bonding member covers a portion of the section part. Partially bent, the bonding member covers the sidewall part.

Description

Display device {DISPLAY DEVICE}

1 is a perspective view illustrating a liquid crystal display according to the present invention.

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

3 is a rear view illustrating a state before the adhesive member of the liquid crystal display according to the present invention is bonded.

4 is a rear view illustrating a bonding state of the adhesive member of the liquid crystal display according to the present invention.

5 is a perspective view showing a modification of the adhesive member according to the present invention.

6 is a rear view illustrating a state in which the adhesive member of FIG. 5 is bonded.

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

100: liquid crystal display panel 220: FPC

222: electronic component 300: light source unit

400: Light guide plate 500: Reflector

600: optical sheet 700: mold frame

720: storage space 800: lower chassis

900: adhesive member 920: protrusion

The present invention relates to a display device, and more particularly, to a display device for preventing a defect caused by electrostatic discharge (ESD) on a liquid crystal display panel.

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 (FPC) provided at one side of the liquid crystal display panel to drive the liquid crystal display panel from an external signal, and a backlight for providing light to the liquid crystal display panel. And a lower chassis accommodating the liquid crystal display panel and the backlight assembly.

One end of the FPC 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. In this case, an insulating double-sided tape is provided between the FPC disposed on the rear surface of the lower chassis and the lower chassis to prevent ESD that may occur between the FPC and the lower chassis.

In addition, the lower chassis is angled (Angle) processing so that the four edges are bent, one side is formed with a cut portion is removed so that a large number of parts mounted on the FPC is accommodated. At this time, the cutout is bent to the upper side of the cutout to supplement the strength of the area in which the plurality of parts formed on one surface of the FPC is accommodated to compensate for the strength of the portion.

However, the upper bent sidewall portion formed on the inner side of the cutout may interfere with a plurality of parts of the FPC housed in the cutout, and an electrostatic defect, ie, ESD is generated in the parts and the lower chassis by the interference. Can be.

This may cause a fatal defect in the productivity of the LCD module, and in particular, if the defect occurs after the product is completed, the aftermath may cause a problem that may be further increased.

In order to solve the above problems, an object of the present invention is to provide a display device for preventing the ESD failure between the FPC and the lower chassis.

In order to achieve the above object, the liquid crystal display of the present invention includes a display panel, a lower chassis having a sidewall portion bent from the edge and having a cutout portion formed to receive the display panel and partially cut off, and the display portion. And a flexible printed circuit board connected to one side of the panel and bent to the rear surface of the lower chassis, and an adhesive member provided between the lower chassis and the flexible printed circuit board, wherein the adhesive member covers a portion of the cutout.

The adhesive member covering a part of the cutout part is bent to cover the sidewall part.

The adhesive member is characterized in that a sheath is formed in a portion so that a portion of the adhesive member is bent.

The adhesive member is characterized in that the protrusion formed to protrude so that a portion of the adhesive member is bent.

A plurality of electronic components are formed on one surface of the flexible printed circuit board, and the electronic components are accommodated in the cutout of the lower chassis.

The adhesive member is an insulating double-sided tape.

The display panel is a liquid crystal display panel, and further comprises a backlight assembly for providing light to the liquid crystal display panel.

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 different forms, only these embodiments are intended to complete the disclosure of the present invention, the scope of the invention to those skilled in the art It is provided to inform you. Like reference numerals in the drawings refer to like elements.

1 is a perspective view showing a liquid crystal display according to the present invention, Figure 2 is a cross-sectional view showing a combined state of the liquid crystal display according to the present invention, Figure 3 is an adhesive member of the liquid crystal display according to the present invention is bonded 4 is a rear view showing a state in which an adhesive member of the liquid crystal display according to the present invention is bonded, and FIG. 5 is a perspective view showing a modified example of the adhesive member according to the present invention. 6 is a rear view illustrating a state in which the adhesive member of FIG. 5 is bonded.

1 and 2, a liquid crystal display according to the present invention includes a liquid crystal display panel 100, a backlight assembly 1000 that provides light to the liquid crystal display panel 100, and the liquid crystal display panel 100. And a lower chassis 800 for accommodating and fixing the backlight assembly 1000, and an adhesive member 900 provided under the lower chassis 800.

The liquid crystal display panel 100 includes a color filter (CF) substrate 110 and a thin film transistor (TFT) substrate 120 disposed under the CF substrate 110. An integrated circuit chip (IC) 210 and a flexible printed circuit board (FPC) 220 are mounted on one side of the liquid crystal display panel 100.

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. In the TFT substrate 120, a TFT having a matrix form is formed, and the source and gate terminals of the TFTs are connected to the data line and the gate line, respectively, and the 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 to the gate line and the data line of the liquid crystal display panel 100, respectively. In addition, one end of the FPC 220 is connected to one side of the TFT substrate 120 to convert an external signal of an analog type inputted through the pad unit 250 formed at the other end of the FPC 220 into a digital signal, thereby converting the IC into an IC. It serves to supply 210. In this case, a plurality of electronic components 222 are mounted on one surface of the FPC 220, and the electronic components 222 are accommodated in the storage space 720 formed in the mold frame 700.

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 FPC 220 mounted on the TFT substrate 120. . That is, the passivation layer 230 is formed to cover the IC 210 and the FPC 220.

The backlight assembly 1000 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. The optical sheet 600 includes a light source unit 300, a light guide plate 400, a reflective plate 500, and a mold frame 700 for accommodating the 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.

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 mold frame 700 is formed in a rectangular frame shape and serves to sequentially receive the components of the backlight assembly 1000 and the liquid crystal display panel 100. 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 light source accommodating part 710 for accommodating the light source part 300 is formed at one inner side of the mold frame 700, and a bar-shaped accommodating part is shown below the mold frame 700. The space 720 is formed. That is, the FPC 220 connected to the liquid crystal display panel 100 is bent to the rear surface of the lower chassis 800 in the storage space 720 so that a plurality of electronic components 222 formed on one surface of the FPC 220 are seated. do.

The lower chassis 800 accommodates the mold frame 700 on which the liquid crystal display panel 100 and the backlight assembly 1000 are mounted, and a base 810 having a cutout 830 formed therein, and Side wall portions 820 (820a to 820d) bent upward from the edge of the base 810. In the cutout 830 formed on the base 810, a plurality of parts 222 formed on the FPC 220 bent to the rear surface of the lower chassis 800 may be seated in the storage space 720 of the mold frame 700. It serves to store. In addition, the side wall portion 820 is bent in an "L" shape from the edge of the base 810, the side wall portion 820d of the base 810, the cut portion 830 is formed is a side wall portion formed on the remaining three sides It is formed lower than the height (820a ~ 820c), the side wall portion 820d of the base 810 where the cutout 830 is formed is coupled to one side of the storage space 720 formed under the mold frame 700. . Accordingly, the sidewall portion 820d of the base 810 where the cutout 830 is formed serves to compensate for the strength of the region in which the plurality of electronic components 222 formed on one surface of the FPC 220 is accommodated.

The adhesive member 900 is provided on the rear surface of the lower chassis 800, and specifically, is provided between the FPC 220 and the lower chassis 800 that are bent to the rear surface of the lower chassis 800. That is, the adhesive member 900 serves to fix the FPC 220 to the lower chassis 800 and to prevent ESD that may occur when the FPC 220 and the lower chassis 800 touch each other. Do it. At this time, it is preferable that the adhesive member 900 uses an insulating double-sided tape.

Hereinafter, the adhesive member is attached to the lower chassis and looks at the adhesive state with the FPC.

3 and 4, a storage space 720 is provided under the mold frame 700 to accommodate a plurality of electronic components 222 formed in the FPC 220, and the storage space 720 is provided. The side wall portion 820d of the base 810 where the cutout 830 of the lower chassis 800 is formed is coupled to one side wall of the bottom wall. In addition, the adhesive member 900 is formed in a rectangular plate shape, and is cut on one surface so as to correspond to the cutout 830 of the lower chassis 800, and specifically, the cross section of the cutout 830 is formed. It is formed to be smaller than the length. In addition, the sheath 910 is formed so as to extend to the cut surface of the adhesive member 900, when a force is applied to the adhesive member 900 in which the sheath 910 is formed, the direction perpendicular to the adhesive member 900 Bent and bent.

That is, the adhesive member 900 is formed to be equal to or slightly larger than the area where the FPC 220 is in contact with the lower chassis 800. Specifically, the adhesive member 900 is a part of the rear surface of the lower chassis 800. And is attached to cover a portion of the cutout 830.

Thereafter, the FPC 220 mounted on the liquid crystal display panel 100 mounted on the mold frame 700 is bent to the rear surface of the lower chassis 800 and adhered to the lower chassis 800. Is bonded with. In this case, the plurality of electronic components 222 formed on the FPC 220 are accommodated in the storage space 720 formed under the mold frame 700 via the cutout 830 formed on the lower chassis 800. The adhesive member 900 covering a portion of the cutout 830 of the lower chassis 800 may be formed by the electronic component 222 seated in the storage space 720 of the mold frame 700. The cutout portion 830 of the () is bent to cover the side wall portion 820d of the lower chassis base 810.

Therefore, the adhesive member 900 is provided between the electronic component 222 formed on one surface of the FPC 220 and the side wall portion 820d of the lower chassis base 810 in which the cutout 830 is formed, thereby providing the electrons. The contact between the component 222 and the lower chassis 800 may be blocked to prevent interference and ESD that may occur between the electronic component 222 and the lower chassis 800.

In addition, the adhesive member 900 may be formed as shown in FIG. 5. That is, the adhesive member 900 is formed in a rectangular plate shape, one side of the adhesive member 900 is cut to correspond to the cutout 830 of the lower chassis 800, the adhesive member to cover a portion of the cut portion ( A protrusion 920 protruding inward of the cut surface of the 900 is formed. In this case, the protrusion 920 may be integrally formed with the adhesive member 900, or may extend from the adhesive member 900.

Thus, as shown in FIG. 6, the adhesive member 900 is attached to cover a part of the rear surface of the lower chassis 800 and a part of the cutout 830, and specifically, the protrusion 920 may be formed. It is bonded to cover a portion of the cutout 830 of the lower chassis 800.

Subsequently, the FPC 220 mounted on the liquid crystal display panel 100 mounted on the mold frame 700 is bent to the rear surface of the lower chassis 800 and adhered to the lower chassis 800. And the plurality of electronic components 222 formed on the FPC 220 are stored in the storage space 720 formed under the mold frame 700 via the cutout 830 formed on the lower chassis 800. The protrusion 920 covering a portion of the cutout 830 of the lower chassis 800 may include a base 810 having the cutout 830 of the lower chassis 800 formed by the electronic component 222. It is bent to cover the side wall part 820d of.

Therefore, the protrusion 920 formed on the adhesive member 900 is a sidewall portion of the base 810 where the electronic component 222 formed on one surface of the FPC 220 and the cutout 830 of the lower chassis 800 are formed. 820d is provided to prevent contact between the electronic component 222 and the lower chassis 800, thereby preventing ESD that may be generated between the electronic component 222 and the lower chassis 800. Can be.

Although the liquid crystal display device has been described above by way of example, the present invention is not limited thereto, and the liquid crystal display device may be applied to various display devices such as a PDP, a FED, and an OLED.

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, by changing the shape of the adhesive member provided between the FPC and the lower chassis of the present invention, there is an effect that can prevent the ESD can be generated in the display device.

In addition, the present invention by changing the shape of the adhesive member provided between the FPC and the lower chassis, there is an effect that can increase the process yield without adding an additional cost of a single piece.

Claims (7)

A lower panel having a display panel, a cutout in which a portion of the display panel is received, a cutout portion formed therein, a sidewall portion bent vertically from an edge thereof, and a flexible printing connected to one side of the display panel and bent to the rear surface of the lower chassis A circuit board, and an adhesive member provided between the lower chassis and the flexible printed circuit board, And the adhesive member covers a portion of the cutout. The display device of claim 1, wherein the adhesive member covering a part of the cutout part is bent to cover the sidewall part. The display device of claim 2, wherein a cut is formed on a portion of the adhesive member such that a portion of the adhesive member is bent. The display device of claim 2, wherein the adhesive member has a protrusion formed to protrude so that a portion of the adhesive member is bent. The display device according to any one of claims 2 to 4, wherein a plurality of electronic components are formed on one surface of the flexible printed circuit board, and the electronic components are stored in the cutout of the lower chassis. The display device of claim 5, wherein the adhesive member is an insulating double-sided tape. The display device of claim 6, wherein the display panel is a liquid crystal display panel, and further comprises a backlight assembly for providing light to the liquid crystal display panel.

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